target-arm/helper.c

   1 #include "cpu.h"
   2 #include "internals.h"
   3 #include "exec/gdbstub.h"
   4 #include "exec/helper-proto.h"
   5 #include "qemu/host-utils.h"
   6 #include "sysemu/arch_init.h"
   7 #include "sysemu/sysemu.h"
   8 #include "qemu/bitops.h"
   9 #include "qemu/crc32c.h"
  10 #include "exec/cpu_ldst.h"
  11 #include "arm_ldst.h"
  12 #include <zlib.h> /* For crc32 */
  13
  14 #ifndef CONFIG_USER_ONLY
  15 static inline int get_phys_addr(CPUARMState *env, target_ulong address,
  16                                 int access_type, int is_user,
  17                                 hwaddr *phys_ptr, int *prot,
  18                                 target_ulong *page_size);
  19
  20 /* Definitions for the PMCCNTR and PMCR registers */
  21 #define PMCRD   0x8
  22 #define PMCRC   0x4
  23 #define PMCRE   0x1
  24 #endif
  25
  26 static int vfp_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg)
  27 {
  28     int nregs;
  29
  30     /* VFP data registers are always little-endian.  */
  31     nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
  32     if (reg < nregs) {
  33         stfq_le_p(buf, env->vfp.regs[reg]);
  34         return 8;
  35     }
  36     if (arm_feature(env, ARM_FEATURE_NEON)) {
  37         /* Aliases for Q regs.  */
  38         nregs += 16;
  39         if (reg < nregs) {
  40             stfq_le_p(buf, env->vfp.regs[(reg - 32) * 2]);
  41             stfq_le_p(buf + 8, env->vfp.regs[(reg - 32) * 2 + 1]);
  42             return 16;
  43         }
  44     }
  45     switch (reg - nregs) {
  46     case 0: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSID]); return 4;
  47     case 1: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSCR]); return 4;
  48     case 2: stl_p(buf, env->vfp.xregs[ARM_VFP_FPEXC]); return 4;
  49     }
  50     return 0;
  51 }
  52
  53 static int vfp_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
  54 {
  55     int nregs;
  56
  57     nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
  58     if (reg < nregs) {
  59         env->vfp.regs[reg] = ldfq_le_p(buf);
  60         return 8;
  61     }
  62     if (arm_feature(env, ARM_FEATURE_NEON)) {
  63         nregs += 16;
  64         if (reg < nregs) {
  65             env->vfp.regs[(reg - 32) * 2] = ldfq_le_p(buf);
  66             env->vfp.regs[(reg - 32) * 2 + 1] = ldfq_le_p(buf + 8);
  67             return 16;
  68         }
  69     }
  70     switch (reg - nregs) {
  71     case 0: env->vfp.xregs[ARM_VFP_FPSID] = ldl_p(buf); return 4;
  72     case 1: env->vfp.xregs[ARM_VFP_FPSCR] = ldl_p(buf); return 4;
  73     case 2: env->vfp.xregs[ARM_VFP_FPEXC] = ldl_p(buf) & (1 << 30); return 4;
  74     }
  75     return 0;
  76 }
  77
  78 static int aarch64_fpu_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg)
  79 {
  80     switch (reg) {
  81     case 0 ... 31:
  82         /* 128 bit FP register */
  83         stfq_le_p(buf, env->vfp.regs[reg * 2]);
  84         stfq_le_p(buf + 8, env->vfp.regs[reg * 2 + 1]);
  85         return 16;
  86     case 32:
  87         /* FPSR */
  88         stl_p(buf, vfp_get_fpsr(env));
  89         return 4;
  90     case 33:
  91         /* FPCR */
  92         stl_p(buf, vfp_get_fpcr(env));
  93         return 4;
  94     default:
  95         return 0;
  96     }
  97 }
  98
  99 static int aarch64_fpu_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
 100 {
 101     switch (reg) {
 102     case 0 ... 31:
 103         /* 128 bit FP register */
 104         env->vfp.regs[reg * 2] = ldfq_le_p(buf);
 105         env->vfp.regs[reg * 2 + 1] = ldfq_le_p(buf + 8);
 106         return 16;
 107     case 32:
 108         /* FPSR */
 109         vfp_set_fpsr(env, ldl_p(buf));
 110         return 4;
 111     case 33:
 112         /* FPCR */
 113         vfp_set_fpcr(env, ldl_p(buf));
 114         return 4;
 115     default:
 116         return 0;
 117     }
 118 }
 119
 120 static uint64_t raw_read(CPUARMState *env, const ARMCPRegInfo *ri)
 121 {
 122     if (cpreg_field_is_64bit(ri)) {
 123         return CPREG_FIELD64(env, ri);
 124     } else {
 125         return CPREG_FIELD32(env, ri);
 126     }
 127 }
 128
 129 static void raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
 130                       uint64_t value)
 131 {
 132     if (cpreg_field_is_64bit(ri)) {
 133         CPREG_FIELD64(env, ri) = value;
 134     } else {
 135         CPREG_FIELD32(env, ri) = value;
 136     }
 137 }
 138
 139 static uint64_t read_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri)
 140 {
 141     /* Raw read of a coprocessor register (as needed for migration, etc). */
 142     if (ri->type & ARM_CP_CONST) {
 143         return ri->resetvalue;
 144     } else if (ri->raw_readfn) {
 145         return ri->raw_readfn(env, ri);
 146     } else if (ri->readfn) {
 147         return ri->readfn(env, ri);
 148     } else {
 149         return raw_read(env, ri);
 150     }
 151 }
 152
 153 static void write_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri,
 154                              uint64_t v)
 155 {
 156     /* Raw write of a coprocessor register (as needed for migration, etc).
 157      * Note that constant registers are treated as write-ignored; the
 158      * caller should check for success by whether a readback gives the
 159      * value written.
 160      */
 161     if (ri->type & ARM_CP_CONST) {
 162         return;
 163     } else if (ri->raw_writefn) {
 164         ri->raw_writefn(env, ri, v);
 165     } else if (ri->writefn) {
 166         ri->writefn(env, ri, v);
 167     } else {
 168         raw_write(env, ri, v);
 169     }
 170 }
 171
 172 bool write_cpustate_to_list(ARMCPU *cpu)
 173 {
 174     /* Write the coprocessor state from cpu->env to the (index,value) list. */
 175     int i;
 176     bool ok = true;
 177
 178     for (i = 0; i < cpu->cpreg_array_len; i++) {
 179         uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
 180         const ARMCPRegInfo *ri;
 181
 182         ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
 183         if (!ri) {
 184             ok = false;
 185             continue;
 186         }
 187         if (ri->type & ARM_CP_NO_MIGRATE) {
 188             continue;
 189         }
 190         cpu->cpreg_values[i] = read_raw_cp_reg(&cpu->env, ri);
 191     }
 192     return ok;
 193 }
 194
 195 bool write_list_to_cpustate(ARMCPU *cpu)
 196 {
 197     int i;
 198     bool ok = true;
 199
 200     for (i = 0; i < cpu->cpreg_array_len; i++) {
 201         uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
 202         uint64_t v = cpu->cpreg_values[i];
 203         const ARMCPRegInfo *ri;
 204
 205         ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
 206         if (!ri) {
 207             ok = false;
 208             continue;
 209         }
 210         if (ri->type & ARM_CP_NO_MIGRATE) {
 211             continue;
 212         }
 213         /* Write value and confirm it reads back as written
 214          * (to catch read-only registers and partially read-only
 215          * registers where the incoming migration value doesn't match)
 216          */
 217         write_raw_cp_reg(&cpu->env, ri, v);
 218         if (read_raw_cp_reg(&cpu->env, ri) != v) {
 219             ok = false;
 220         }
 221     }
 222     return ok;
 223 }
 224
 225 static void add_cpreg_to_list(gpointer key, gpointer opaque)
 226 {
 227     ARMCPU *cpu = opaque;
 228     uint64_t regidx;
 229     const ARMCPRegInfo *ri;
 230
 231     regidx = *(uint32_t *)key;
 232     ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
 233
 234     if (!(ri->type & ARM_CP_NO_MIGRATE)) {
 235         cpu->cpreg_indexes[cpu->cpreg_array_len] = cpreg_to_kvm_id(regidx);
 236         /* The value array need not be initialized at this point */
 237         cpu->cpreg_array_len++;
 238     }
 239 }
 240
 241 static void count_cpreg(gpointer key, gpointer opaque)
 242 {
 243     ARMCPU *cpu = opaque;
 244     uint64_t regidx;
 245     const ARMCPRegInfo *ri;
 246
 247     regidx = *(uint32_t *)key;
 248     ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
 249
 250     if (!(ri->type & ARM_CP_NO_MIGRATE)) {
 251         cpu->cpreg_array_len++;
 252     }
 253 }
 254
 255 static gint cpreg_key_compare(gconstpointer a, gconstpointer b)
 256 {
 257     uint64_t aidx = cpreg_to_kvm_id(*(uint32_t *)a);
 258     uint64_t bidx = cpreg_to_kvm_id(*(uint32_t *)b);
 259
 260     if (aidx > bidx) {
 261         return 1;
 262     }
 263     if (aidx < bidx) {
 264         return -1;
 265     }
 266     return 0;
 267 }
 268
 269 static void cpreg_make_keylist(gpointer key, gpointer value, gpointer udata)
 270 {
 271     GList **plist = udata;
 272
 273     *plist = g_list_prepend(*plist, key);
 274 }
 275
 276 void init_cpreg_list(ARMCPU *cpu)
 277 {
 278     /* Initialise the cpreg_tuples[] array based on the cp_regs hash.
 279      * Note that we require cpreg_tuples[] to be sorted by key ID.
 280      */
 281     GList *keys = NULL;
 282     int arraylen;
 283
 284     g_hash_table_foreach(cpu->cp_regs, cpreg_make_keylist, &keys);
 285
 286     keys = g_list_sort(keys, cpreg_key_compare);
 287
 288     cpu->cpreg_array_len = 0;
 289
 290     g_list_foreach(keys, count_cpreg, cpu);
 291
 292     arraylen = cpu->cpreg_array_len;
 293     cpu->cpreg_indexes = g_new(uint64_t, arraylen);
 294     cpu->cpreg_values = g_new(uint64_t, arraylen);
 295     cpu->cpreg_vmstate_indexes = g_new(uint64_t, arraylen);
 296     cpu->cpreg_vmstate_values = g_new(uint64_t, arraylen);
 297     cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
 298     cpu->cpreg_array_len = 0;
 299
 300     g_list_foreach(keys, add_cpreg_to_list, cpu);
 301
 302     assert(cpu->cpreg_array_len == arraylen);
 303
 304     g_list_free(keys);
 305 }
 306
 307 /* Return true if extended addresses are enabled.
 308  * This is always the case if our translation regime is 64 bit,
 309  * but depends on TTBCR.EAE for 32 bit.
 310  */
 311 static inline bool extended_addresses_enabled(CPUARMState *env)
 312 {
 313     return arm_el_is_aa64(env, 1)
 314         || ((arm_feature(env, ARM_FEATURE_LPAE)
 315              && (env->cp15.c2_control & (1U << 31))));
 316 }
 317
 318 static void dacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
 319 {
 320     ARMCPU *cpu = arm_env_get_cpu(env);
 321
 322     raw_write(env, ri, value);
 323     tlb_flush(CPU(cpu), 1); /* Flush TLB as domain not tracked in TLB */
 324 }
 325
 326 static void fcse_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
 327 {
 328     ARMCPU *cpu = arm_env_get_cpu(env);
 329
 330     if (raw_read(env, ri) != value) {
 331         /* Unlike real hardware the qemu TLB uses virtual addresses,
 332          * not modified virtual addresses, so this causes a TLB flush.
 333          */
 334         tlb_flush(CPU(cpu), 1);
 335         raw_write(env, ri, value);
 336     }
 337 }
 338
 339 static void contextidr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 340                              uint64_t value)
 341 {
 342     ARMCPU *cpu = arm_env_get_cpu(env);
 343
 344     if (raw_read(env, ri) != value && !arm_feature(env, ARM_FEATURE_MPU)
 345         && !extended_addresses_enabled(env)) {
 346         /* For VMSA (when not using the LPAE long descriptor page table
 347          * format) this register includes the ASID, so do a TLB flush.
 348          * For PMSA it is purely a process ID and no action is needed.
 349          */
 350         tlb_flush(CPU(cpu), 1);
 351     }
 352     raw_write(env, ri, value);
 353 }
 354
 355 static void tlbiall_write(CPUARMState *env, const ARMCPRegInfo *ri,
 356                           uint64_t value)
 357 {
 358     /* Invalidate all (TLBIALL) */
 359     ARMCPU *cpu = arm_env_get_cpu(env);
 360
 361     tlb_flush(CPU(cpu), 1);
 362 }
 363
 364 static void tlbimva_write(CPUARMState *env, const ARMCPRegInfo *ri,
 365                           uint64_t value)
 366 {
 367     /* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */
 368     ARMCPU *cpu = arm_env_get_cpu(env);
 369
 370     tlb_flush_page(CPU(cpu), value & TARGET_PAGE_MASK);
 371 }
 372
 373 static void tlbiasid_write(CPUARMState *env, const ARMCPRegInfo *ri,
 374                            uint64_t value)
 375 {
 376     /* Invalidate by ASID (TLBIASID) */
 377     ARMCPU *cpu = arm_env_get_cpu(env);
 378
 379     tlb_flush(CPU(cpu), value == 0);
 380 }
 381
 382 static void tlbimvaa_write(CPUARMState *env, const ARMCPRegInfo *ri,
 383                            uint64_t value)
 384 {
 385     /* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */
 386     ARMCPU *cpu = arm_env_get_cpu(env);
 387
 388     tlb_flush_page(CPU(cpu), value & TARGET_PAGE_MASK);
 389 }
 390
 391 static const ARMCPRegInfo cp_reginfo[] = {
 392     /* DBGDIDR: just RAZ. In particular this means the "debug architecture
 393      * version" bits will read as a reserved value, which should cause
 394      * Linux to not try to use the debug hardware.
 395      */
 396     { .name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0,
 397       .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
 398     { .name = "FCSEIDR", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 0,
 399       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c13_fcse),
 400       .resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, },
 401     { .name = "CONTEXTIDR", .state = ARM_CP_STATE_BOTH,
 402       .opc0 = 3, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 1,
 403       .access = PL1_RW,
 404       .fieldoffset = offsetof(CPUARMState, cp15.contextidr_el1),
 405       .resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, },
 406     REGINFO_SENTINEL
 407 };
 408
 409 static const ARMCPRegInfo not_v8_cp_reginfo[] = {
 410     /* NB: Some of these registers exist in v8 but with more precise
 411      * definitions that don't use CP_ANY wildcards (mostly in v8_cp_reginfo[]).
 412      */
 413     /* MMU Domain access control / MPU write buffer control */
 414     { .name = "DACR", .cp = 15,
 415       .crn = 3, .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
 416       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c3),
 417       .resetvalue = 0, .writefn = dacr_write, .raw_writefn = raw_write, },
 418     /* ??? This covers not just the impdef TLB lockdown registers but also
 419      * some v7VMSA registers relating to TEX remap, so it is overly broad.
 420      */
 421     { .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = CP_ANY,
 422       .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
 423     /* MMU TLB control. Note that the wildcarding means we cover not just
 424      * the unified TLB ops but also the dside/iside/inner-shareable variants.
 425      */
 426     { .name = "TLBIALL", .cp = 15, .crn = 8, .crm = CP_ANY,
 427       .opc1 = CP_ANY, .opc2 = 0, .access = PL1_W, .writefn = tlbiall_write,
 428       .type = ARM_CP_NO_MIGRATE },
 429     { .name = "TLBIMVA", .cp = 15, .crn = 8, .crm = CP_ANY,
 430       .opc1 = CP_ANY, .opc2 = 1, .access = PL1_W, .writefn = tlbimva_write,
 431       .type = ARM_CP_NO_MIGRATE },
 432     { .name = "TLBIASID", .cp = 15, .crn = 8, .crm = CP_ANY,
 433       .opc1 = CP_ANY, .opc2 = 2, .access = PL1_W, .writefn = tlbiasid_write,
 434       .type = ARM_CP_NO_MIGRATE },
 435     { .name = "TLBIMVAA", .cp = 15, .crn = 8, .crm = CP_ANY,
 436       .opc1 = CP_ANY, .opc2 = 3, .access = PL1_W, .writefn = tlbimvaa_write,
 437       .type = ARM_CP_NO_MIGRATE },
 438     /* Cache maintenance ops; some of this space may be overridden later. */
 439     { .name = "CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
 440       .opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
 441       .type = ARM_CP_NOP | ARM_CP_OVERRIDE },
 442     REGINFO_SENTINEL
 443 };
 444
 445 static const ARMCPRegInfo not_v6_cp_reginfo[] = {
 446     /* Not all pre-v6 cores implemented this WFI, so this is slightly
 447      * over-broad.
 448      */
 449     { .name = "WFI_v5", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = 2,
 450       .access = PL1_W, .type = ARM_CP_WFI },
 451     REGINFO_SENTINEL
 452 };
 453
 454 static const ARMCPRegInfo not_v7_cp_reginfo[] = {
 455     /* Standard v6 WFI (also used in some pre-v6 cores); not in v7 (which
 456      * is UNPREDICTABLE; we choose to NOP as most implementations do).
 457      */
 458     { .name = "WFI_v6", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
 459       .access = PL1_W, .type = ARM_CP_WFI },
 460     /* L1 cache lockdown. Not architectural in v6 and earlier but in practice
 461      * implemented in 926, 946, 1026, 1136, 1176 and 11MPCore. StrongARM and
 462      * OMAPCP will override this space.
 463      */
 464     { .name = "DLOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 0,
 465       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_data),
 466       .resetvalue = 0 },
 467     { .name = "ILOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 1,
 468       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_insn),
 469       .resetvalue = 0 },
 470     /* v6 doesn't have the cache ID registers but Linux reads them anyway */
 471     { .name = "DUMMY", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = CP_ANY,
 472       .access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
 473       .resetvalue = 0 },
 474     REGINFO_SENTINEL
 475 };
 476
 477 static void cpacr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 478                         uint64_t value)
 479 {
 480     uint32_t mask = 0;
 481
 482     /* In ARMv8 most bits of CPACR_EL1 are RES0. */
 483     if (!arm_feature(env, ARM_FEATURE_V8)) {
 484         /* ARMv7 defines bits for unimplemented coprocessors as RAZ/WI.
 485          * ASEDIS [31] and D32DIS [30] are both UNK/SBZP without VFP.
 486          * TRCDIS [28] is RAZ/WI since we do not implement a trace macrocell.
 487          */
 488         if (arm_feature(env, ARM_FEATURE_VFP)) {
 489             /* VFP coprocessor: cp10 & cp11 [23:20] */
 490             mask |= (1 << 31) | (1 << 30) | (0xf << 20);
 491
 492             if (!arm_feature(env, ARM_FEATURE_NEON)) {
 493                 /* ASEDIS [31] bit is RAO/WI */
 494                 value |= (1 << 31);
 495             }
 496
 497             /* VFPv3 and upwards with NEON implement 32 double precision
 498              * registers (D0-D31).
 499              */
 500             if (!arm_feature(env, ARM_FEATURE_NEON) ||
 501                     !arm_feature(env, ARM_FEATURE_VFP3)) {
 502                 /* D32DIS [30] is RAO/WI if D16-31 are not implemented. */
 503                 value |= (1 << 30);
 504             }
 505         }
 506         value &= mask;
 507     }
 508     env->cp15.c1_coproc = value;
 509 }
 510
 511 static const ARMCPRegInfo v6_cp_reginfo[] = {
 512     /* prefetch by MVA in v6, NOP in v7 */
 513     { .name = "MVA_prefetch",
 514       .cp = 15, .crn = 7, .crm = 13, .opc1 = 0, .opc2 = 1,
 515       .access = PL1_W, .type = ARM_CP_NOP },
 516     { .name = "ISB", .cp = 15, .crn = 7, .crm = 5, .opc1 = 0, .opc2 = 4,
 517       .access = PL0_W, .type = ARM_CP_NOP },
 518     { .name = "DSB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 4,
 519       .access = PL0_W, .type = ARM_CP_NOP },
 520     { .name = "DMB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 5,
 521       .access = PL0_W, .type = ARM_CP_NOP },
 522     { .name = "IFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 2,
 523       .access = PL1_RW,
 524       .fieldoffset = offsetofhigh32(CPUARMState, cp15.far_el1),
 525       .resetvalue = 0, },
 526     /* Watchpoint Fault Address Register : should actually only be present
 527      * for 1136, 1176, 11MPCore.
 528      */
 529     { .name = "WFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 1,
 530       .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0, },
 531     { .name = "CPACR", .state = ARM_CP_STATE_BOTH, .opc0 = 3,
 532       .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2,
 533       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_coproc),
 534       .resetvalue = 0, .writefn = cpacr_write },
 535     REGINFO_SENTINEL
 536 };
 537
 538 static CPAccessResult pmreg_access(CPUARMState *env, const ARMCPRegInfo *ri)
 539 {
 540     /* Performance monitor registers user accessibility is controlled
 541      * by PMUSERENR.
 542      */
 543     if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) {
 544         return CP_ACCESS_TRAP;
 545     }
 546     return CP_ACCESS_OK;
 547 }
 548
 549 #ifndef CONFIG_USER_ONLY
 550 static void pmcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 551                        uint64_t value)
 552 {
 553     /* Don't computer the number of ticks in user mode */
 554     uint32_t temp_ticks;
 555
 556     temp_ticks = qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) *
 557                   get_ticks_per_sec() / 1000000;
 558
 559     if (env->cp15.c9_pmcr & PMCRE) {
 560         /* If the counter is enabled */
 561         if (env->cp15.c9_pmcr & PMCRD) {
 562             /* Increment once every 64 processor clock cycles */
 563             env->cp15.c15_ccnt = (temp_ticks/64) - env->cp15.c15_ccnt;
 564         } else {
 565             env->cp15.c15_ccnt = temp_ticks - env->cp15.c15_ccnt;
 566         }
 567     }
 568
 569     if (value & PMCRC) {
 570         /* The counter has been reset */
 571         env->cp15.c15_ccnt = 0;
 572     }
 573
 574     /* only the DP, X, D and E bits are writable */
 575     env->cp15.c9_pmcr &= ~0x39;
 576     env->cp15.c9_pmcr |= (value & 0x39);
 577
 578     if (env->cp15.c9_pmcr & PMCRE) {
 579         if (env->cp15.c9_pmcr & PMCRD) {
 580             /* Increment once every 64 processor clock cycles */
 581             temp_ticks /= 64;
 582         }
 583         env->cp15.c15_ccnt = temp_ticks - env->cp15.c15_ccnt;
 584     }
 585 }
 586
 587 static uint64_t pmccntr_read(CPUARMState *env, const ARMCPRegInfo *ri)
 588 {
 589     uint32_t total_ticks;
 590
 591     if (!(env->cp15.c9_pmcr & PMCRE)) {
 592         /* Counter is disabled, do not change value */
 593         return env->cp15.c15_ccnt;
 594     }
 595
 596     total_ticks = qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) *
 597                   get_ticks_per_sec() / 1000000;
 598
 599     if (env->cp15.c9_pmcr & PMCRD) {
 600         /* Increment once every 64 processor clock cycles */
 601         total_ticks /= 64;
 602     }
 603     return total_ticks - env->cp15.c15_ccnt;
 604 }
 605
 606 static void pmccntr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 607                         uint64_t value)
 608 {
 609     uint32_t total_ticks;
 610
 611     if (!(env->cp15.c9_pmcr & PMCRE)) {
 612         /* Counter is disabled, set the absolute value */
 613         env->cp15.c15_ccnt = value;
 614         return;
 615     }
 616
 617     total_ticks = qemu_clock_get_us(QEMU_CLOCK_VIRTUAL) *
 618                   get_ticks_per_sec() / 1000000;
 619
 620     if (env->cp15.c9_pmcr & PMCRD) {
 621         /* Increment once every 64 processor clock cycles */
 622         total_ticks /= 64;
 623     }
 624     env->cp15.c15_ccnt = total_ticks - value;
 625 }
 626 #endif
 627
 628 static void pmcntenset_write(CPUARMState *env, const ARMCPRegInfo *ri,
 629                             uint64_t value)
 630 {
 631     value &= (1 << 31);
 632     env->cp15.c9_pmcnten |= value;
 633 }
 634
 635 static void pmcntenclr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 636                              uint64_t value)
 637 {
 638     value &= (1 << 31);
 639     env->cp15.c9_pmcnten &= ~value;
 640 }
 641
 642 static void pmovsr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 643                          uint64_t value)
 644 {
 645     env->cp15.c9_pmovsr &= ~value;
 646 }
 647
 648 static void pmxevtyper_write(CPUARMState *env, const ARMCPRegInfo *ri,
 649                              uint64_t value)
 650 {
 651     env->cp15.c9_pmxevtyper = value & 0xff;
 652 }
 653
 654 static void pmuserenr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 655                             uint64_t value)
 656 {
 657     env->cp15.c9_pmuserenr = value & 1;
 658 }
 659
 660 static void pmintenset_write(CPUARMState *env, const ARMCPRegInfo *ri,
 661                              uint64_t value)
 662 {
 663     /* We have no event counters so only the C bit can be changed */
 664     value &= (1 << 31);
 665     env->cp15.c9_pminten |= value;
 666 }
 667
 668 static void pmintenclr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 669                              uint64_t value)
 670 {
 671     value &= (1 << 31);
 672     env->cp15.c9_pminten &= ~value;
 673 }
 674
 675 static void vbar_write(CPUARMState *env, const ARMCPRegInfo *ri,
 676                        uint64_t value)
 677 {
 678     /* Note that even though the AArch64 view of this register has bits
 679      * [10:0] all RES0 we can only mask the bottom 5, to comply with the
 680      * architectural requirements for bits which are RES0 only in some
 681      * contexts. (ARMv8 would permit us to do no masking at all, but ARMv7
 682      * requires the bottom five bits to be RAZ/WI because they're UNK/SBZP.)
 683      */
 684     raw_write(env, ri, value & ~0x1FULL);
 685 }
 686
 687 static uint64_t ccsidr_read(CPUARMState *env, const ARMCPRegInfo *ri)
 688 {
 689     ARMCPU *cpu = arm_env_get_cpu(env);
 690     return cpu->ccsidr[env->cp15.c0_cssel];
 691 }
 692
 693 static void csselr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 694                          uint64_t value)
 695 {
 696     raw_write(env, ri, value & 0xf);
 697 }
 698
 699 static uint64_t isr_read(CPUARMState *env, const ARMCPRegInfo *ri)
 700 {
 701     CPUState *cs = ENV_GET_CPU(env);
 702     uint64_t ret = 0;
 703
 704     if (cs->interrupt_request & CPU_INTERRUPT_HARD) {
 705         ret |= CPSR_I;
 706     }
 707     if (cs->interrupt_request & CPU_INTERRUPT_FIQ) {
 708         ret |= CPSR_F;
 709     }
 710     /* External aborts are not possible in QEMU so A bit is always clear */
 711     return ret;
 712 }
 713
 714 static const ARMCPRegInfo v7_cp_reginfo[] = {
 715     /* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped
 716      * debug components
 717      */
 718     { .name = "DBGDRAR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
 719       .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
 720     { .name = "DBGDSAR", .cp = 14, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
 721       .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
 722     /* the old v6 WFI, UNPREDICTABLE in v7 but we choose to NOP */
 723     { .name = "NOP", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
 724       .access = PL1_W, .type = ARM_CP_NOP },
 725     /* Performance monitors are implementation defined in v7,
 726      * but with an ARM recommended set of registers, which we
 727      * follow (although we don't actually implement any counters)
 728      *
 729      * Performance registers fall into three categories:
 730      *  (a) always UNDEF in PL0, RW in PL1 (PMINTENSET, PMINTENCLR)
 731      *  (b) RO in PL0 (ie UNDEF on write), RW in PL1 (PMUSERENR)
 732      *  (c) UNDEF in PL0 if PMUSERENR.EN==0, otherwise accessible (all others)
 733      * For the cases controlled by PMUSERENR we must set .access to PL0_RW
 734      * or PL0_RO as appropriate and then check PMUSERENR in the helper fn.
 735      */
 736     { .name = "PMCNTENSET", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 1,
 737       .access = PL0_RW, .resetvalue = 0,
 738       .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten),
 739       .writefn = pmcntenset_write,
 740       .accessfn = pmreg_access,
 741       .raw_writefn = raw_write },
 742     { .name = "PMCNTENCLR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 2,
 743       .access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten),
 744       .accessfn = pmreg_access,
 745       .writefn = pmcntenclr_write,
 746       .type = ARM_CP_NO_MIGRATE },
 747     { .name = "PMOVSR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 3,
 748       .access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmovsr),
 749       .accessfn = pmreg_access,
 750       .writefn = pmovsr_write,
 751       .raw_writefn = raw_write },
 752     /* Unimplemented so WI. */
 753     { .name = "PMSWINC", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 4,
 754       .access = PL0_W, .accessfn = pmreg_access, .type = ARM_CP_NOP },
 755     /* Since we don't implement any events, writing to PMSELR is UNPREDICTABLE.
 756      * We choose to RAZ/WI.
 757      */
 758     { .name = "PMSELR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 5,
 759       .access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0,
 760       .accessfn = pmreg_access },
 761 #ifndef CONFIG_USER_ONLY
 762     { .name = "PMCCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 0,
 763       .access = PL0_RW, .resetvalue = 0, .type = ARM_CP_IO,
 764       .readfn = pmccntr_read, .writefn = pmccntr_write,
 765       .accessfn = pmreg_access },
 766 #endif
 767     { .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1,
 768       .access = PL0_RW,
 769       .fieldoffset = offsetof(CPUARMState, cp15.c9_pmxevtyper),
 770       .accessfn = pmreg_access, .writefn = pmxevtyper_write,
 771       .raw_writefn = raw_write },
 772     /* Unimplemented, RAZ/WI. */
 773     { .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2,
 774       .access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0,
 775       .accessfn = pmreg_access },
 776     { .name = "PMUSERENR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 0,
 777       .access = PL0_R | PL1_RW,
 778       .fieldoffset = offsetof(CPUARMState, cp15.c9_pmuserenr),
 779       .resetvalue = 0,
 780       .writefn = pmuserenr_write, .raw_writefn = raw_write },
 781     { .name = "PMINTENSET", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 1,
 782       .access = PL1_RW,
 783       .fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
 784       .resetvalue = 0,
 785       .writefn = pmintenset_write, .raw_writefn = raw_write },
 786     { .name = "PMINTENCLR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 2,
 787       .access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
 788       .fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
 789       .resetvalue = 0, .writefn = pmintenclr_write, },
 790     { .name = "VBAR", .state = ARM_CP_STATE_BOTH,
 791       .opc0 = 3, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 0,
 792       .access = PL1_RW, .writefn = vbar_write,
 793       .fieldoffset = offsetof(CPUARMState, cp15.vbar_el[1]),
 794       .resetvalue = 0 },
 795     { .name = "SCR", .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 0,
 796       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_scr),
 797       .resetvalue = 0, },
 798     { .name = "CCSIDR", .state = ARM_CP_STATE_BOTH,
 799       .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 0,
 800       .access = PL1_R, .readfn = ccsidr_read, .type = ARM_CP_NO_MIGRATE },
 801     { .name = "CSSELR", .state = ARM_CP_STATE_BOTH,
 802       .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 2, .opc2 = 0,
 803       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c0_cssel),
 804       .writefn = csselr_write, .resetvalue = 0 },
 805     /* Auxiliary ID register: this actually has an IMPDEF value but for now
 806      * just RAZ for all cores:
 807      */
 808     { .name = "AIDR", .state = ARM_CP_STATE_BOTH,
 809       .opc0 = 3, .opc1 = 1, .crn = 0, .crm = 0, .opc2 = 7,
 810       .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
 811     /* Auxiliary fault status registers: these also are IMPDEF, and we
 812      * choose to RAZ/WI for all cores.
 813      */
 814     { .name = "AFSR0_EL1", .state = ARM_CP_STATE_BOTH,
 815       .opc0 = 3, .opc1 = 0, .crn = 5, .crm = 1, .opc2 = 0,
 816       .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
 817     { .name = "AFSR1_EL1", .state = ARM_CP_STATE_BOTH,
 818       .opc0 = 3, .opc1 = 0, .crn = 5, .crm = 1, .opc2 = 1,
 819       .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
 820     /* MAIR can just read-as-written because we don't implement caches
 821      * and so don't need to care about memory attributes.
 822      */
 823     { .name = "MAIR_EL1", .state = ARM_CP_STATE_AA64,
 824       .opc0 = 3, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 0,
 825       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.mair_el1),
 826       .resetvalue = 0 },
 827     /* For non-long-descriptor page tables these are PRRR and NMRR;
 828      * regardless they still act as reads-as-written for QEMU.
 829      * The override is necessary because of the overly-broad TLB_LOCKDOWN
 830      * definition.
 831      */
 832     { .name = "MAIR0", .state = ARM_CP_STATE_AA32, .type = ARM_CP_OVERRIDE,
 833       .cp = 15, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 0, .access = PL1_RW,
 834       .fieldoffset = offsetoflow32(CPUARMState, cp15.mair_el1),
 835       .resetfn = arm_cp_reset_ignore },
 836     { .name = "MAIR1", .state = ARM_CP_STATE_AA32, .type = ARM_CP_OVERRIDE,
 837       .cp = 15, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 1, .access = PL1_RW,
 838       .fieldoffset = offsetofhigh32(CPUARMState, cp15.mair_el1),
 839       .resetfn = arm_cp_reset_ignore },
 840     { .name = "ISR_EL1", .state = ARM_CP_STATE_BOTH,
 841       .opc0 = 3, .opc1 = 0, .crn = 12, .crm = 1, .opc2 = 0,
 842       .type = ARM_CP_NO_MIGRATE, .access = PL1_R, .readfn = isr_read },
 843     REGINFO_SENTINEL
 844 };
 845
 846 static void teecr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 847                         uint64_t value)
 848 {
 849     value &= 1;
 850     env->teecr = value;
 851 }
 852
 853 static CPAccessResult teehbr_access(CPUARMState *env, const ARMCPRegInfo *ri)
 854 {
 855     if (arm_current_pl(env) == 0 && (env->teecr & 1)) {
 856         return CP_ACCESS_TRAP;
 857     }
 858     return CP_ACCESS_OK;
 859 }
 860
 861 static const ARMCPRegInfo t2ee_cp_reginfo[] = {
 862     { .name = "TEECR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 6, .opc2 = 0,
 863       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, teecr),
 864       .resetvalue = 0,
 865       .writefn = teecr_write },
 866     { .name = "TEEHBR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 6, .opc2 = 0,
 867       .access = PL0_RW, .fieldoffset = offsetof(CPUARMState, teehbr),
 868       .accessfn = teehbr_access, .resetvalue = 0 },
 869     REGINFO_SENTINEL
 870 };
 871
 872 static const ARMCPRegInfo v6k_cp_reginfo[] = {
 873     { .name = "TPIDR_EL0", .state = ARM_CP_STATE_AA64,
 874       .opc0 = 3, .opc1 = 3, .opc2 = 2, .crn = 13, .crm = 0,
 875       .access = PL0_RW,
 876       .fieldoffset = offsetof(CPUARMState, cp15.tpidr_el0), .resetvalue = 0 },
 877     { .name = "TPIDRURW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 2,
 878       .access = PL0_RW,
 879       .fieldoffset = offsetoflow32(CPUARMState, cp15.tpidr_el0),
 880       .resetfn = arm_cp_reset_ignore },
 881     { .name = "TPIDRRO_EL0", .state = ARM_CP_STATE_AA64,
 882       .opc0 = 3, .opc1 = 3, .opc2 = 3, .crn = 13, .crm = 0,
 883       .access = PL0_R|PL1_W,
 884       .fieldoffset = offsetof(CPUARMState, cp15.tpidrro_el0), .resetvalue = 0 },
 885     { .name = "TPIDRURO", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 3,
 886       .access = PL0_R|PL1_W,
 887       .fieldoffset = offsetoflow32(CPUARMState, cp15.tpidrro_el0),
 888       .resetfn = arm_cp_reset_ignore },
 889     { .name = "TPIDR_EL1", .state = ARM_CP_STATE_BOTH,
 890       .opc0 = 3, .opc1 = 0, .opc2 = 4, .crn = 13, .crm = 0,
 891       .access = PL1_RW,
 892       .fieldoffset = offsetof(CPUARMState, cp15.tpidr_el1), .resetvalue = 0 },
 893     REGINFO_SENTINEL
 894 };
 895
 896 #ifndef CONFIG_USER_ONLY
 897
 898 static CPAccessResult gt_cntfrq_access(CPUARMState *env, const ARMCPRegInfo *ri)
 899 {
 900     /* CNTFRQ: not visible from PL0 if both PL0PCTEN and PL0VCTEN are zero */
 901     if (arm_current_pl(env) == 0 && !extract32(env->cp15.c14_cntkctl, 0, 2)) {
 902         return CP_ACCESS_TRAP;
 903     }
 904     return CP_ACCESS_OK;
 905 }
 906
 907 static CPAccessResult gt_counter_access(CPUARMState *env, int timeridx)
 908 {
 909     /* CNT[PV]CT: not visible from PL0 if ELO[PV]CTEN is zero */
 910     if (arm_current_pl(env) == 0 &&
 911         !extract32(env->cp15.c14_cntkctl, timeridx, 1)) {
 912         return CP_ACCESS_TRAP;
 913     }
 914     return CP_ACCESS_OK;
 915 }
 916
 917 static CPAccessResult gt_timer_access(CPUARMState *env, int timeridx)
 918 {
 919     /* CNT[PV]_CVAL, CNT[PV]_CTL, CNT[PV]_TVAL: not visible from PL0 if
 920      * EL0[PV]TEN is zero.
 921      */
 922     if (arm_current_pl(env) == 0 &&
 923         !extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
 924         return CP_ACCESS_TRAP;
 925     }
 926     return CP_ACCESS_OK;
 927 }
 928
 929 static CPAccessResult gt_pct_access(CPUARMState *env,
 930                                          const ARMCPRegInfo *ri)
 931 {
 932     return gt_counter_access(env, GTIMER_PHYS);
 933 }
 934
 935 static CPAccessResult gt_vct_access(CPUARMState *env,
 936                                          const ARMCPRegInfo *ri)
 937 {
 938     return gt_counter_access(env, GTIMER_VIRT);
 939 }
 940
 941 static CPAccessResult gt_ptimer_access(CPUARMState *env, const ARMCPRegInfo *ri)
 942 {
 943     return gt_timer_access(env, GTIMER_PHYS);
 944 }
 945
 946 static CPAccessResult gt_vtimer_access(CPUARMState *env, const ARMCPRegInfo *ri)
 947 {
 948     return gt_timer_access(env, GTIMER_VIRT);
 949 }
 950
 951 static uint64_t gt_get_countervalue(CPUARMState *env)
 952 {
 953     return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / GTIMER_SCALE;
 954 }
 955
 956 static void gt_recalc_timer(ARMCPU *cpu, int timeridx)
 957 {
 958     ARMGenericTimer *gt = &cpu->env.cp15.c14_timer[timeridx];
 959
 960     if (gt->ctl & 1) {
 961         /* Timer enabled: calculate and set current ISTATUS, irq, and
 962          * reset timer to when ISTATUS next has to change
 963          */
 964         uint64_t count = gt_get_countervalue(&cpu->env);
 965         /* Note that this must be unsigned 64 bit arithmetic: */
 966         int istatus = count >= gt->cval;
 967         uint64_t nexttick;
 968
 969         gt->ctl = deposit32(gt->ctl, 2, 1, istatus);
 970         qemu_set_irq(cpu->gt_timer_outputs[timeridx],
 971                      (istatus && !(gt->ctl & 2)));
 972         if (istatus) {
 973             /* Next transition is when count rolls back over to zero */
 974             nexttick = UINT64_MAX;
 975         } else {
 976             /* Next transition is when we hit cval */
 977             nexttick = gt->cval;
 978         }
 979         /* Note that the desired next expiry time might be beyond the
 980          * signed-64-bit range of a QEMUTimer -- in this case we just
 981          * set the timer for as far in the future as possible. When the
 982          * timer expires we will reset the timer for any remaining period.
 983          */
 984         if (nexttick > INT64_MAX / GTIMER_SCALE) {
 985             nexttick = INT64_MAX / GTIMER_SCALE;
 986         }
 987         timer_mod(cpu->gt_timer[timeridx], nexttick);
 988     } else {
 989         /* Timer disabled: ISTATUS and timer output always clear */
 990         gt->ctl &= ~4;
 991         qemu_set_irq(cpu->gt_timer_outputs[timeridx], 0);
 992         timer_del(cpu->gt_timer[timeridx]);
 993     }
 994 }
 995
 996 static void gt_cnt_reset(CPUARMState *env, const ARMCPRegInfo *ri)
 997 {
 998     ARMCPU *cpu = arm_env_get_cpu(env);
 999     int timeridx = ri->opc1 & 1;
1000
1001     timer_del(cpu->gt_timer[timeridx]);
1002 }
1003
1004 static uint64_t gt_cnt_read(CPUARMState *env, const ARMCPRegInfo *ri)
1005 {
1006     return gt_get_countervalue(env);
1007 }
1008
1009 static void gt_cval_write(CPUARMState *env, const ARMCPRegInfo *ri,
1010                           uint64_t value)
1011 {
1012     int timeridx = ri->opc1 & 1;
1013
1014     env->cp15.c14_timer[timeridx].cval = value;
1015     gt_recalc_timer(arm_env_get_cpu(env), timeridx);
1016 }
1017
1018 static uint64_t gt_tval_read(CPUARMState *env, const ARMCPRegInfo *ri)
1019 {
1020     int timeridx = ri->crm & 1;
1021
1022     return (uint32_t)(env->cp15.c14_timer[timeridx].cval -
1023                       gt_get_countervalue(env));
1024 }
1025
1026 static void gt_tval_write(CPUARMState *env, const ARMCPRegInfo *ri,
1027                           uint64_t value)
1028 {
1029     int timeridx = ri->crm & 1;
1030
1031     env->cp15.c14_timer[timeridx].cval = gt_get_countervalue(env) +
1032         + sextract64(value, 0, 32);
1033     gt_recalc_timer(arm_env_get_cpu(env), timeridx);
1034 }
1035
1036 static void gt_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri,
1037                          uint64_t value)
1038 {
1039     ARMCPU *cpu = arm_env_get_cpu(env);
1040     int timeridx = ri->crm & 1;
1041     uint32_t oldval = env->cp15.c14_timer[timeridx].ctl;
1042
1043     env->cp15.c14_timer[timeridx].ctl = deposit64(oldval, 0, 2, value);
1044     if ((oldval ^ value) & 1) {
1045         /* Enable toggled */
1046         gt_recalc_timer(cpu, timeridx);
1047     } else if ((oldval ^ value) & 2) {
1048         /* IMASK toggled: don't need to recalculate,
1049          * just set the interrupt line based on ISTATUS
1050          */
1051         qemu_set_irq(cpu->gt_timer_outputs[timeridx],
1052                      (oldval & 4) && !(value & 2));
1053     }
1054 }
1055
1056 void arm_gt_ptimer_cb(void *opaque)
1057 {
1058     ARMCPU *cpu = opaque;
1059
1060     gt_recalc_timer(cpu, GTIMER_PHYS);
1061 }
1062
1063 void arm_gt_vtimer_cb(void *opaque)
1064 {
1065     ARMCPU *cpu = opaque;
1066
1067     gt_recalc_timer(cpu, GTIMER_VIRT);
1068 }
1069
1070 static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
1071     /* Note that CNTFRQ is purely reads-as-written for the benefit
1072      * of software; writing it doesn't actually change the timer frequency.
1073      * Our reset value matches the fixed frequency we implement the timer at.
1074      */
1075     { .name = "CNTFRQ", .cp = 15, .crn = 14, .crm = 0, .opc1 = 0, .opc2 = 0,
1076       .type = ARM_CP_NO_MIGRATE,
1077       .access = PL1_RW | PL0_R, .accessfn = gt_cntfrq_access,
1078       .fieldoffset = offsetoflow32(CPUARMState, cp15.c14_cntfrq),
1079       .resetfn = arm_cp_reset_ignore,
1080     },
1081     { .name = "CNTFRQ_EL0", .state = ARM_CP_STATE_AA64,
1082       .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 0,
1083       .access = PL1_RW | PL0_R, .accessfn = gt_cntfrq_access,
1084       .fieldoffset = offsetof(CPUARMState, cp15.c14_cntfrq),
1085       .resetvalue = (1000 * 1000 * 1000) / GTIMER_SCALE,
1086     },
1087     /* overall control: mostly access permissions */
1088     { .name = "CNTKCTL", .state = ARM_CP_STATE_BOTH,
1089       .opc0 = 3, .opc1 = 0, .crn = 14, .crm = 1, .opc2 = 0,
1090       .access = PL1_RW,
1091       .fieldoffset = offsetof(CPUARMState, cp15.c14_cntkctl),
1092       .resetvalue = 0,
1093     },
1094     /* per-timer control */
1095     { .name = "CNTP_CTL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 1,
1096       .type = ARM_CP_IO | ARM_CP_NO_MIGRATE, .access = PL1_RW | PL0_R,
1097       .accessfn = gt_ptimer_access,
1098       .fieldoffset = offsetoflow32(CPUARMState,
1099                                    cp15.c14_timer[GTIMER_PHYS].ctl),
1100       .resetfn = arm_cp_reset_ignore,
1101       .writefn = gt_ctl_write, .raw_writefn = raw_write,
1102     },
1103     { .name = "CNTP_CTL_EL0", .state = ARM_CP_STATE_AA64,
1104       .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 1,
1105       .type = ARM_CP_IO, .access = PL1_RW | PL0_R,
1106       .accessfn = gt_ptimer_access,
1107       .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].ctl),
1108       .resetvalue = 0,
1109       .writefn = gt_ctl_write, .raw_writefn = raw_write,
1110     },
1111     { .name = "CNTV_CTL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 1,
1112       .type = ARM_CP_IO | ARM_CP_NO_MIGRATE, .access = PL1_RW | PL0_R,
1113       .accessfn = gt_vtimer_access,
1114       .fieldoffset = offsetoflow32(CPUARMState,
1115                                    cp15.c14_timer[GTIMER_VIRT].ctl),
1116       .resetfn = arm_cp_reset_ignore,
1117       .writefn = gt_ctl_write, .raw_writefn = raw_write,
1118     },
1119     { .name = "CNTV_CTL_EL0", .state = ARM_CP_STATE_AA64,
1120       .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 1,
1121       .type = ARM_CP_IO, .access = PL1_RW | PL0_R,
1122       .accessfn = gt_vtimer_access,
1123       .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].ctl),
1124       .resetvalue = 0,
1125       .writefn = gt_ctl_write, .raw_writefn = raw_write,
1126     },
1127     /* TimerValue views: a 32 bit downcounting view of the underlying state */
1128     { .name = "CNTP_TVAL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 0,
1129       .type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
1130       .accessfn = gt_ptimer_access,
1131       .readfn = gt_tval_read, .writefn = gt_tval_write,
1132     },
1133     { .name = "CNTP_TVAL_EL0", .state = ARM_CP_STATE_AA64,
1134       .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 0,
1135       .type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
1136       .readfn = gt_tval_read, .writefn = gt_tval_write,
1137     },
1138     { .name = "CNTV_TVAL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 0,
1139       .type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
1140       .accessfn = gt_vtimer_access,
1141       .readfn = gt_tval_read, .writefn = gt_tval_write,
1142     },
1143     { .name = "CNTV_TVAL_EL0", .state = ARM_CP_STATE_AA64,
1144       .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 0,
1145       .type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
1146       .readfn = gt_tval_read, .writefn = gt_tval_write,
1147     },
1148     /* The counter itself */
1149     { .name = "CNTPCT", .cp = 15, .crm = 14, .opc1 = 0,
1150       .access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE | ARM_CP_IO,
1151       .accessfn = gt_pct_access,
1152       .readfn = gt_cnt_read, .resetfn = arm_cp_reset_ignore,
1153     },
1154     { .name = "CNTPCT_EL0", .state = ARM_CP_STATE_AA64,
1155       .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 1,
1156       .access = PL0_R, .type = ARM_CP_NO_MIGRATE | ARM_CP_IO,
1157       .accessfn = gt_pct_access,
1158       .readfn = gt_cnt_read, .resetfn = gt_cnt_reset,
1159     },
1160     { .name = "CNTVCT", .cp = 15, .crm = 14, .opc1 = 1,
1161       .access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE | ARM_CP_IO,
1162       .accessfn = gt_vct_access,
1163       .readfn = gt_cnt_read, .resetfn = arm_cp_reset_ignore,
1164     },
1165     { .name = "CNTVCT_EL0", .state = ARM_CP_STATE_AA64,
1166       .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 2,
1167       .access = PL0_R, .type = ARM_CP_NO_MIGRATE | ARM_CP_IO,
1168       .accessfn = gt_vct_access,
1169       .readfn = gt_cnt_read, .resetfn = gt_cnt_reset,
1170     },
1171     /* Comparison value, indicating when the timer goes off */
1172     { .name = "CNTP_CVAL", .cp = 15, .crm = 14, .opc1 = 2,
1173       .access = PL1_RW | PL0_R,
1174       .type = ARM_CP_64BIT | ARM_CP_IO | ARM_CP_NO_MIGRATE,
1175       .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval),
1176       .accessfn = gt_ptimer_access, .resetfn = arm_cp_reset_ignore,
1177       .writefn = gt_cval_write, .raw_writefn = raw_write,
1178     },
1179     { .name = "CNTP_CVAL_EL0", .state = ARM_CP_STATE_AA64,
1180       .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 2,
1181       .access = PL1_RW | PL0_R,
1182       .type = ARM_CP_IO,
1183       .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval),
1184       .resetvalue = 0, .accessfn = gt_vtimer_access,
1185       .writefn = gt_cval_write, .raw_writefn = raw_write,
1186     },
1187     { .name = "CNTV_CVAL", .cp = 15, .crm = 14, .opc1 = 3,
1188       .access = PL1_RW | PL0_R,
1189       .type = ARM_CP_64BIT | ARM_CP_IO | ARM_CP_NO_MIGRATE,
1190       .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval),
1191       .accessfn = gt_vtimer_access, .resetfn = arm_cp_reset_ignore,
1192       .writefn = gt_cval_write, .raw_writefn = raw_write,
1193     },
1194     { .name = "CNTV_CVAL_EL0", .state = ARM_CP_STATE_AA64,
1195       .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 2,
1196       .access = PL1_RW | PL0_R,
1197       .type = ARM_CP_IO,
1198       .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval),
1199       .resetvalue = 0, .accessfn = gt_vtimer_access,
1200       .writefn = gt_cval_write, .raw_writefn = raw_write,
1201     },
1202     REGINFO_SENTINEL
1203 };
1204
1205 #else
1206 /* In user-mode none of the generic timer registers are accessible,
1207  * and their implementation depends on QEMU_CLOCK_VIRTUAL and qdev gpio outputs,
1208  * so instead just don't register any of them.
1209  */
1210 static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
1211     REGINFO_SENTINEL
1212 };
1213
1214 #endif
1215
1216 static void par_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
1217 {
1218     if (arm_feature(env, ARM_FEATURE_LPAE)) {
1219         raw_write(env, ri, value);
1220     } else if (arm_feature(env, ARM_FEATURE_V7)) {
1221         raw_write(env, ri, value & 0xfffff6ff);
1222     } else {
1223         raw_write(env, ri, value & 0xfffff1ff);
1224     }
1225 }
1226
1227 #ifndef CONFIG_USER_ONLY
1228 /* get_phys_addr() isn't present for user-mode-only targets */
1229
1230 static CPAccessResult ats_access(CPUARMState *env, const ARMCPRegInfo *ri)
1231 {
1232     if (ri->opc2 & 4) {
1233         /* Other states are only available with TrustZone; in
1234          * a non-TZ implementation these registers don't exist
1235          * at all, which is an Uncategorized trap. This underdecoding
1236          * is safe because the reginfo is NO_MIGRATE.
1237          */
1238         return CP_ACCESS_TRAP_UNCATEGORIZED;
1239     }
1240     return CP_ACCESS_OK;
1241 }
1242
1243 static void ats_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
1244 {
1245     hwaddr phys_addr;
1246     target_ulong page_size;
1247     int prot;
1248     int ret, is_user = ri->opc2 & 2;
1249     int access_type = ri->opc2 & 1;
1250
1251     ret = get_phys_addr(env, value, access_type, is_user,
1252                         &phys_addr, &prot, &page_size);
1253     if (extended_addresses_enabled(env)) {
1254         /* ret is a DFSR/IFSR value for the long descriptor
1255          * translation table format, but with WnR always clear.
1256          * Convert it to a 64-bit PAR.
1257          */
1258         uint64_t par64 = (1 << 11); /* LPAE bit always set */
1259         if (ret == 0) {
1260             par64 |= phys_addr & ~0xfffULL;
1261             /* We don't set the ATTR or SH fields in the PAR. */
1262         } else {
1263             par64 |= 1; /* F */
1264             par64 |= (ret & 0x3f) << 1; /* FS */
1265             /* Note that S2WLK and FSTAGE are always zero, because we don't
1266              * implement virtualization and therefore there can't be a stage 2
1267              * fault.
1268              */
1269         }
1270         env->cp15.par_el1 = par64;
1271     } else {
1272         /* ret is a DFSR/IFSR value for the short descriptor
1273          * translation table format (with WnR always clear).
1274          * Convert it to a 32-bit PAR.
1275          */
1276         if (ret == 0) {
1277             /* We do not set any attribute bits in the PAR */
1278             if (page_size == (1 << 24)
1279                 && arm_feature(env, ARM_FEATURE_V7)) {
1280                 env->cp15.par_el1 = (phys_addr & 0xff000000) | 1 << 1;
1281             } else {
1282                 env->cp15.par_el1 = phys_addr & 0xfffff000;
1283             }
1284         } else {
1285             env->cp15.par_el1 = ((ret & (1 << 10)) >> 5) |
1286                 ((ret & (1 << 12)) >> 6) |
1287                 ((ret & 0xf) << 1) | 1;
1288         }
1289     }
1290 }
1291 #endif
1292
1293 static const ARMCPRegInfo vapa_cp_reginfo[] = {
1294     { .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0,
1295       .access = PL1_RW, .resetvalue = 0,
1296       .fieldoffset = offsetoflow32(CPUARMState, cp15.par_el1),
1297       .writefn = par_write },
1298 #ifndef CONFIG_USER_ONLY
1299     { .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY,
1300       .access = PL1_W, .accessfn = ats_access,
1301       .writefn = ats_write, .type = ARM_CP_NO_MIGRATE },
1302 #endif
1303     REGINFO_SENTINEL
1304 };
1305
1306 /* Return basic MPU access permission bits.  */
1307 static uint32_t simple_mpu_ap_bits(uint32_t val)
1308 {
1309     uint32_t ret;
1310     uint32_t mask;
1311     int i;
1312     ret = 0;
1313     mask = 3;
1314     for (i = 0; i < 16; i += 2) {
1315         ret |= (val >> i) & mask;
1316         mask <<= 2;
1317     }
1318     return ret;
1319 }
1320
1321 /* Pad basic MPU access permission bits to extended format.  */
1322 static uint32_t extended_mpu_ap_bits(uint32_t val)
1323 {
1324     uint32_t ret;
1325     uint32_t mask;
1326     int i;
1327     ret = 0;
1328     mask = 3;
1329     for (i = 0; i < 16; i += 2) {
1330         ret |= (val & mask) << i;
1331         mask <<= 2;
1332     }
1333     return ret;
1334 }
1335
1336 static void pmsav5_data_ap_write(CPUARMState *env, const ARMCPRegInfo *ri,
1337                                  uint64_t value)
1338 {
1339     env->cp15.pmsav5_data_ap = extended_mpu_ap_bits(value);
1340 }
1341
1342 static uint64_t pmsav5_data_ap_read(CPUARMState *env, const ARMCPRegInfo *ri)
1343 {
1344     return simple_mpu_ap_bits(env->cp15.pmsav5_data_ap);
1345 }
1346
1347 static void pmsav5_insn_ap_write(CPUARMState *env, const ARMCPRegInfo *ri,
1348                                  uint64_t value)
1349 {
1350     env->cp15.pmsav5_insn_ap = extended_mpu_ap_bits(value);
1351 }
1352
1353 static uint64_t pmsav5_insn_ap_read(CPUARMState *env, const ARMCPRegInfo *ri)
1354 {
1355     return simple_mpu_ap_bits(env->cp15.pmsav5_insn_ap);
1356 }
1357
1358 static const ARMCPRegInfo pmsav5_cp_reginfo[] = {
1359     { .name = "DATA_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
1360       .access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
1361       .fieldoffset = offsetof(CPUARMState, cp15.pmsav5_data_ap),
1362       .resetvalue = 0,
1363       .readfn = pmsav5_data_ap_read, .writefn = pmsav5_data_ap_write, },
1364     { .name = "INSN_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
1365       .access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
1366       .fieldoffset = offsetof(CPUARMState, cp15.pmsav5_insn_ap),
1367       .resetvalue = 0,
1368       .readfn = pmsav5_insn_ap_read, .writefn = pmsav5_insn_ap_write, },
1369     { .name = "DATA_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 2,
1370       .access = PL1_RW,
1371       .fieldoffset = offsetof(CPUARMState, cp15.pmsav5_data_ap),
1372       .resetvalue = 0, },
1373     { .name = "INSN_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 3,
1374       .access = PL1_RW,
1375       .fieldoffset = offsetof(CPUARMState, cp15.pmsav5_insn_ap),
1376       .resetvalue = 0, },
1377     { .name = "DCACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
1378       .access = PL1_RW,
1379       .fieldoffset = offsetof(CPUARMState, cp15.c2_data), .resetvalue = 0, },
1380     { .name = "ICACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
1381       .access = PL1_RW,
1382       .fieldoffset = offsetof(CPUARMState, cp15.c2_insn), .resetvalue = 0, },
1383     /* Protection region base and size registers */
1384     { .name = "946_PRBS0", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0,
1385       .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1386       .fieldoffset = offsetof(CPUARMState, cp15.c6_region[0]) },
1387     { .name = "946_PRBS1", .cp = 15, .crn = 6, .crm = 1, .opc1 = 0,
1388       .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1389       .fieldoffset = offsetof(CPUARMState, cp15.c6_region[1]) },
1390     { .name = "946_PRBS2", .cp = 15, .crn = 6, .crm = 2, .opc1 = 0,
1391       .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1392       .fieldoffset = offsetof(CPUARMState, cp15.c6_region[2]) },
1393     { .name = "946_PRBS3", .cp = 15, .crn = 6, .crm = 3, .opc1 = 0,
1394       .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1395       .fieldoffset = offsetof(CPUARMState, cp15.c6_region[3]) },
1396     { .name = "946_PRBS4", .cp = 15, .crn = 6, .crm = 4, .opc1 = 0,
1397       .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1398       .fieldoffset = offsetof(CPUARMState, cp15.c6_region[4]) },
1399     { .name = "946_PRBS5", .cp = 15, .crn = 6, .crm = 5, .opc1 = 0,
1400       .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1401       .fieldoffset = offsetof(CPUARMState, cp15.c6_region[5]) },
1402     { .name = "946_PRBS6", .cp = 15, .crn = 6, .crm = 6, .opc1 = 0,
1403       .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1404       .fieldoffset = offsetof(CPUARMState, cp15.c6_region[6]) },
1405     { .name = "946_PRBS7", .cp = 15, .crn = 6, .crm = 7, .opc1 = 0,
1406       .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0,
1407       .fieldoffset = offsetof(CPUARMState, cp15.c6_region[7]) },
1408     REGINFO_SENTINEL
1409 };
1410
1411 static void vmsa_ttbcr_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
1412                                  uint64_t value)
1413 {
1414     int maskshift = extract32(value, 0, 3);
1415
1416     if (arm_feature(env, ARM_FEATURE_LPAE) && (value & (1 << 31))) {
1417         value &= ~((7 << 19) | (3 << 14) | (0xf << 3));
1418     } else {
1419         value &= 7;
1420     }
1421     /* Note that we always calculate c2_mask and c2_base_mask, but
1422      * they are only used for short-descriptor tables (ie if EAE is 0);
1423      * for long-descriptor tables the TTBCR fields are used differently
1424      * and the c2_mask and c2_base_mask values are meaningless.
1425      */
1426     raw_write(env, ri, value);
1427     env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> maskshift);
1428     env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> maskshift);
1429 }
1430
1431 static void vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1432                              uint64_t value)
1433 {
1434     ARMCPU *cpu = arm_env_get_cpu(env);
1435
1436     if (arm_feature(env, ARM_FEATURE_LPAE)) {
1437         /* With LPAE the TTBCR could result in a change of ASID
1438          * via the TTBCR.A1 bit, so do a TLB flush.
1439          */
1440         tlb_flush(CPU(cpu), 1);
1441     }
1442     vmsa_ttbcr_raw_write(env, ri, value);
1443 }
1444
1445 static void vmsa_ttbcr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1446 {
1447     env->cp15.c2_base_mask = 0xffffc000u;
1448     raw_write(env, ri, 0);
1449     env->cp15.c2_mask = 0;
1450 }
1451
1452 static void vmsa_tcr_el1_write(CPUARMState *env, const ARMCPRegInfo *ri,
1453                                uint64_t value)
1454 {
1455     ARMCPU *cpu = arm_env_get_cpu(env);
1456
1457     /* For AArch64 the A1 bit could result in a change of ASID, so TLB flush. */
1458     tlb_flush(CPU(cpu), 1);
1459     raw_write(env, ri, value);
1460 }
1461
1462 static void vmsa_ttbr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1463                             uint64_t value)
1464 {
1465     /* 64 bit accesses to the TTBRs can change the ASID and so we
1466      * must flush the TLB.
1467      */
1468     if (cpreg_field_is_64bit(ri)) {
1469         ARMCPU *cpu = arm_env_get_cpu(env);
1470
1471         tlb_flush(CPU(cpu), 1);
1472     }
1473     raw_write(env, ri, value);
1474 }
1475
1476 static const ARMCPRegInfo vmsa_cp_reginfo[] = {
1477     { .name = "DFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
1478       .access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
1479       .fieldoffset = offsetoflow32(CPUARMState, cp15.esr_el[1]),
1480       .resetfn = arm_cp_reset_ignore, },
1481     { .name = "IFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
1482       .access = PL1_RW,
1483       .fieldoffset = offsetof(CPUARMState, cp15.ifsr_el2), .resetvalue = 0, },
1484     { .name = "ESR_EL1", .state = ARM_CP_STATE_AA64,
1485       .opc0 = 3, .crn = 5, .crm = 2, .opc1 = 0, .opc2 = 0,
1486       .access = PL1_RW,
1487       .fieldoffset = offsetof(CPUARMState, cp15.esr_el[1]), .resetvalue = 0, },
1488     { .name = "TTBR0_EL1", .state = ARM_CP_STATE_BOTH,
1489       .opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
1490       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el1),
1491       .writefn = vmsa_ttbr_write, .resetvalue = 0 },
1492     { .name = "TTBR1_EL1", .state = ARM_CP_STATE_BOTH,
1493       .opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
1494       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.ttbr1_el1),
1495       .writefn = vmsa_ttbr_write, .resetvalue = 0 },
1496     { .name = "TCR_EL1", .state = ARM_CP_STATE_AA64,
1497       .opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
1498       .access = PL1_RW, .writefn = vmsa_tcr_el1_write,
1499       .resetfn = vmsa_ttbcr_reset, .raw_writefn = raw_write,
1500       .fieldoffset = offsetof(CPUARMState, cp15.c2_control) },
1501     { .name = "TTBCR", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
1502       .access = PL1_RW, .type = ARM_CP_NO_MIGRATE, .writefn = vmsa_ttbcr_write,
1503       .resetfn = arm_cp_reset_ignore, .raw_writefn = vmsa_ttbcr_raw_write,
1504       .fieldoffset = offsetoflow32(CPUARMState, cp15.c2_control) },
1505     /* 64-bit FAR; this entry also gives us the AArch32 DFAR */
1506     { .name = "FAR_EL1", .state = ARM_CP_STATE_BOTH,
1507       .opc0 = 3, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 0,
1508       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.far_el1),
1509       .resetvalue = 0, },
1510     REGINFO_SENTINEL
1511 };
1512
1513 static void omap_ticonfig_write(CPUARMState *env, const ARMCPRegInfo *ri,
1514                                 uint64_t value)
1515 {
1516     env->cp15.c15_ticonfig = value & 0xe7;
1517     /* The OS_TYPE bit in this register changes the reported CPUID! */
1518     env->cp15.c0_cpuid = (value & (1 << 5)) ?
1519         ARM_CPUID_TI915T : ARM_CPUID_TI925T;
1520 }
1521
1522 static void omap_threadid_write(CPUARMState *env, const ARMCPRegInfo *ri,
1523                                 uint64_t value)
1524 {
1525     env->cp15.c15_threadid = value & 0xffff;
1526 }
1527
1528 static void omap_wfi_write(CPUARMState *env, const ARMCPRegInfo *ri,
1529                            uint64_t value)
1530 {
1531     /* Wait-for-interrupt (deprecated) */
1532     cpu_interrupt(CPU(arm_env_get_cpu(env)), CPU_INTERRUPT_HALT);
1533 }
1534
1535 static void omap_cachemaint_write(CPUARMState *env, const ARMCPRegInfo *ri,
1536                                   uint64_t value)
1537 {
1538     /* On OMAP there are registers indicating the max/min index of dcache lines
1539      * containing a dirty line; cache flush operations have to reset these.
1540      */
1541     env->cp15.c15_i_max = 0x000;
1542     env->cp15.c15_i_min = 0xff0;
1543 }
1544
1545 static const ARMCPRegInfo omap_cp_reginfo[] = {
1546     { .name = "DFSR", .cp = 15, .crn = 5, .crm = CP_ANY,
1547       .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_OVERRIDE,
1548       .fieldoffset = offsetoflow32(CPUARMState, cp15.esr_el[1]),
1549       .resetvalue = 0, },
1550     { .name = "", .cp = 15, .crn = 15, .crm = 0, .opc1 = 0, .opc2 = 0,
1551       .access = PL1_RW, .type = ARM_CP_NOP },
1552     { .name = "TICONFIG", .cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0,
1553       .access = PL1_RW,
1554       .fieldoffset = offsetof(CPUARMState, cp15.c15_ticonfig), .resetvalue = 0,
1555       .writefn = omap_ticonfig_write },
1556     { .name = "IMAX", .cp = 15, .crn = 15, .crm = 2, .opc1 = 0, .opc2 = 0,
1557       .access = PL1_RW,
1558       .fieldoffset = offsetof(CPUARMState, cp15.c15_i_max), .resetvalue = 0, },
1559     { .name = "IMIN", .cp = 15, .crn = 15, .crm = 3, .opc1 = 0, .opc2 = 0,
1560       .access = PL1_RW, .resetvalue = 0xff0,
1561       .fieldoffset = offsetof(CPUARMState, cp15.c15_i_min) },
1562     { .name = "THREADID", .cp = 15, .crn = 15, .crm = 4, .opc1 = 0, .opc2 = 0,
1563       .access = PL1_RW,
1564       .fieldoffset = offsetof(CPUARMState, cp15.c15_threadid), .resetvalue = 0,
1565       .writefn = omap_threadid_write },
1566     { .name = "TI925T_STATUS", .cp = 15, .crn = 15,
1567       .crm = 8, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
1568       .type = ARM_CP_NO_MIGRATE,
1569       .readfn = arm_cp_read_zero, .writefn = omap_wfi_write, },
1570     /* TODO: Peripheral port remap register:
1571      * On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller
1572      * base address at $rn & ~0xfff and map size of 0x200 << ($rn & 0xfff),
1573      * when MMU is off.
1574      */
1575     { .name = "OMAP_CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
1576       .opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
1577       .type = ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE,
1578       .writefn = omap_cachemaint_write },
1579     { .name = "C9", .cp = 15, .crn = 9,
1580       .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW,
1581       .type = ARM_CP_CONST | ARM_CP_OVERRIDE, .resetvalue = 0 },
1582     REGINFO_SENTINEL
1583 };
1584
1585 static void xscale_cpar_write(CPUARMState *env, const ARMCPRegInfo *ri,
1586                               uint64_t value)
1587 {
1588     value &= 0x3fff;
1589     if (env->cp15.c15_cpar != value) {
1590         /* Changes cp0 to cp13 behavior, so needs a TB flush.  */
1591         tb_flush(env);
1592         env->cp15.c15_cpar = value;
1593     }
1594 }
1595
1596 static const ARMCPRegInfo xscale_cp_reginfo[] = {
1597     { .name = "XSCALE_CPAR",
1598       .cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
1599       .fieldoffset = offsetof(CPUARMState, cp15.c15_cpar), .resetvalue = 0,
1600       .writefn = xscale_cpar_write, },
1601     { .name = "XSCALE_AUXCR",
1602       .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1, .access = PL1_RW,
1603       .fieldoffset = offsetof(CPUARMState, cp15.c1_xscaleauxcr),
1604       .resetvalue = 0, },
1605     /* XScale specific cache-lockdown: since we have no cache we NOP these
1606      * and hope the guest does not really rely on cache behaviour.
1607      */
1608     { .name = "XSCALE_LOCK_ICACHE_LINE",
1609       .cp = 15, .opc1 = 0, .crn = 9, .crm = 1, .opc2 = 0,
1610       .access = PL1_W, .type = ARM_CP_NOP },
1611     { .name = "XSCALE_UNLOCK_ICACHE",
1612       .cp = 15, .opc1 = 0, .crn = 9, .crm = 1, .opc2 = 1,
1613       .access = PL1_W, .type = ARM_CP_NOP },
1614     { .name = "XSCALE_DCACHE_LOCK",
1615       .cp = 15, .opc1 = 0, .crn = 9, .crm = 2, .opc2 = 0,
1616       .access = PL1_RW, .type = ARM_CP_NOP },
1617     { .name = "XSCALE_UNLOCK_DCACHE",
1618       .cp = 15, .opc1 = 0, .crn = 9, .crm = 2, .opc2 = 1,
1619       .access = PL1_W, .type = ARM_CP_NOP },
1620     REGINFO_SENTINEL
1621 };
1622
1623 static const ARMCPRegInfo dummy_c15_cp_reginfo[] = {
1624     /* RAZ/WI the whole crn=15 space, when we don't have a more specific
1625      * implementation of this implementation-defined space.
1626      * Ideally this should eventually disappear in favour of actually
1627      * implementing the correct behaviour for all cores.
1628      */
1629     { .name = "C15_IMPDEF", .cp = 15, .crn = 15,
1630       .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
1631       .access = PL1_RW,
1632       .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE | ARM_CP_OVERRIDE,
1633       .resetvalue = 0 },
1634     REGINFO_SENTINEL
1635 };
1636
1637 static const ARMCPRegInfo cache_dirty_status_cp_reginfo[] = {
1638     /* Cache status: RAZ because we have no cache so it's always clean */
1639     { .name = "CDSR", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 6,
1640       .access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1641       .resetvalue = 0 },
1642     REGINFO_SENTINEL
1643 };
1644
1645 static const ARMCPRegInfo cache_block_ops_cp_reginfo[] = {
1646     /* We never have a a block transfer operation in progress */
1647     { .name = "BXSR", .cp = 15, .crn = 7, .crm = 12, .opc1 = 0, .opc2 = 4,
1648       .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1649       .resetvalue = 0 },
1650     /* The cache ops themselves: these all NOP for QEMU */
1651     { .name = "IICR", .cp = 15, .crm = 5, .opc1 = 0,
1652       .access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1653     { .name = "IDCR", .cp = 15, .crm = 6, .opc1 = 0,
1654       .access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1655     { .name = "CDCR", .cp = 15, .crm = 12, .opc1 = 0,
1656       .access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1657     { .name = "PIR", .cp = 15, .crm = 12, .opc1 = 1,
1658       .access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1659     { .name = "PDR", .cp = 15, .crm = 12, .opc1 = 2,
1660       .access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1661     { .name = "CIDCR", .cp = 15, .crm = 14, .opc1 = 0,
1662       .access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1663     REGINFO_SENTINEL
1664 };
1665
1666 static const ARMCPRegInfo cache_test_clean_cp_reginfo[] = {
1667     /* The cache test-and-clean instructions always return (1 << 30)
1668      * to indicate that there are no dirty cache lines.
1669      */
1670     { .name = "TC_DCACHE", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 3,
1671       .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1672       .resetvalue = (1 << 30) },
1673     { .name = "TCI_DCACHE", .cp = 15, .crn = 7, .crm = 14, .opc1 = 0, .opc2 = 3,
1674       .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1675       .resetvalue = (1 << 30) },
1676     REGINFO_SENTINEL
1677 };
1678
1679 static const ARMCPRegInfo strongarm_cp_reginfo[] = {
1680     /* Ignore ReadBuffer accesses */
1681     { .name = "C9_READBUFFER", .cp = 15, .crn = 9,
1682       .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
1683       .access = PL1_RW, .resetvalue = 0,
1684       .type = ARM_CP_CONST | ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE },
1685     REGINFO_SENTINEL
1686 };
1687
1688 static uint64_t mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri)
1689 {
1690     CPUState *cs = CPU(arm_env_get_cpu(env));
1691     uint32_t mpidr = cs->cpu_index;
1692     /* We don't support setting cluster ID ([8..11]) (known as Aff1
1693      * in later ARM ARM versions), or any of the higher affinity level fields,
1694      * so these bits always RAZ.
1695      */
1696     if (arm_feature(env, ARM_FEATURE_V7MP)) {
1697         mpidr |= (1U << 31);
1698         /* Cores which are uniprocessor (non-coherent)
1699          * but still implement the MP extensions set
1700          * bit 30. (For instance, A9UP.) However we do
1701          * not currently model any of those cores.
1702          */
1703     }
1704     return mpidr;
1705 }
1706
1707 static const ARMCPRegInfo mpidr_cp_reginfo[] = {
1708     { .name = "MPIDR", .state = ARM_CP_STATE_BOTH,
1709       .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 5,
1710       .access = PL1_R, .readfn = mpidr_read, .type = ARM_CP_NO_MIGRATE },
1711     REGINFO_SENTINEL
1712 };
1713
1714 static const ARMCPRegInfo lpae_cp_reginfo[] = {
1715     /* NOP AMAIR0/1: the override is because these clash with the rather
1716      * broadly specified TLB_LOCKDOWN entry in the generic cp_reginfo.
1717      */
1718     { .name = "AMAIR0", .state = ARM_CP_STATE_BOTH,
1719       .opc0 = 3, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 0,
1720       .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE,
1721       .resetvalue = 0 },
1722     /* AMAIR1 is mapped to AMAIR_EL1[63:32] */
1723     { .name = "AMAIR1", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 1,
1724       .access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE,
1725       .resetvalue = 0 },
1726     /* 64 bit access versions of the (dummy) debug registers */
1727     { .name = "DBGDRAR", .cp = 14, .crm = 1, .opc1 = 0,
1728       .access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
1729     { .name = "DBGDSAR", .cp = 14, .crm = 2, .opc1 = 0,
1730       .access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
1731     { .name = "PAR", .cp = 15, .crm = 7, .opc1 = 0,
1732       .access = PL1_RW, .type = ARM_CP_64BIT,
1733       .fieldoffset = offsetof(CPUARMState, cp15.par_el1), .resetvalue = 0 },
1734     { .name = "TTBR0", .cp = 15, .crm = 2, .opc1 = 0,
1735       .access = PL1_RW, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE,
1736       .fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el1),
1737       .writefn = vmsa_ttbr_write, .resetfn = arm_cp_reset_ignore },
1738     { .name = "TTBR1", .cp = 15, .crm = 2, .opc1 = 1,
1739       .access = PL1_RW, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE,
1740       .fieldoffset = offsetof(CPUARMState, cp15.ttbr1_el1),
1741       .writefn = vmsa_ttbr_write, .resetfn = arm_cp_reset_ignore },
1742     REGINFO_SENTINEL
1743 };
1744
1745 static uint64_t aa64_fpcr_read(CPUARMState *env, const ARMCPRegInfo *ri)
1746 {
1747     return vfp_get_fpcr(env);
1748 }
1749
1750 static void aa64_fpcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1751                             uint64_t value)
1752 {
1753     vfp_set_fpcr(env, value);
1754 }
1755
1756 static uint64_t aa64_fpsr_read(CPUARMState *env, const ARMCPRegInfo *ri)
1757 {
1758     return vfp_get_fpsr(env);
1759 }
1760
1761 static void aa64_fpsr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1762                             uint64_t value)
1763 {
1764     vfp_set_fpsr(env, value);
1765 }
1766
1767 static CPAccessResult aa64_daif_access(CPUARMState *env, const ARMCPRegInfo *ri)
1768 {
1769     if (arm_current_pl(env) == 0 && !(env->cp15.c1_sys & SCTLR_UMA)) {
1770         return CP_ACCESS_TRAP;
1771     }
1772     return CP_ACCESS_OK;
1773 }
1774
1775 static void aa64_daif_write(CPUARMState *env, const ARMCPRegInfo *ri,
1776                             uint64_t value)
1777 {
1778     env->daif = value & PSTATE_DAIF;
1779 }
1780
1781 static CPAccessResult aa64_cacheop_access(CPUARMState *env,
1782                                           const ARMCPRegInfo *ri)
1783 {
1784     /* Cache invalidate/clean: NOP, but EL0 must UNDEF unless
1785      * SCTLR_EL1.UCI is set.
1786      */
1787     if (arm_current_pl(env) == 0 && !(env->cp15.c1_sys & SCTLR_UCI)) {
1788         return CP_ACCESS_TRAP;
1789     }
1790     return CP_ACCESS_OK;
1791 }
1792
1793 static void tlbi_aa64_va_write(CPUARMState *env, const ARMCPRegInfo *ri,
1794                                uint64_t value)
1795 {
1796     /* Invalidate by VA (AArch64 version) */
1797     ARMCPU *cpu = arm_env_get_cpu(env);
1798     uint64_t pageaddr = value << 12;
1799     tlb_flush_page(CPU(cpu), pageaddr);
1800 }
1801
1802 static void tlbi_aa64_vaa_write(CPUARMState *env, const ARMCPRegInfo *ri,
1803                                 uint64_t value)
1804 {
1805     /* Invalidate by VA, all ASIDs (AArch64 version) */
1806     ARMCPU *cpu = arm_env_get_cpu(env);
1807     uint64_t pageaddr = value << 12;
1808     tlb_flush_page(CPU(cpu), pageaddr);
1809 }
1810
1811 static void tlbi_aa64_asid_write(CPUARMState *env, const ARMCPRegInfo *ri,
1812                                  uint64_t value)
1813 {
1814     /* Invalidate by ASID (AArch64 version) */
1815     ARMCPU *cpu = arm_env_get_cpu(env);
1816     int asid = extract64(value, 48, 16);
1817     tlb_flush(CPU(cpu), asid == 0);
1818 }
1819
1820 static CPAccessResult aa64_zva_access(CPUARMState *env, const ARMCPRegInfo *ri)
1821 {
1822     /* We don't implement EL2, so the only control on DC ZVA is the
1823      * bit in the SCTLR which can prohibit access for EL0.
1824      */
1825     if (arm_current_pl(env) == 0 && !(env->cp15.c1_sys & SCTLR_DZE)) {
1826         return CP_ACCESS_TRAP;
1827     }
1828     return CP_ACCESS_OK;
1829 }
1830
1831 static uint64_t aa64_dczid_read(CPUARMState *env, const ARMCPRegInfo *ri)
1832 {
1833     ARMCPU *cpu = arm_env_get_cpu(env);
1834     int dzp_bit = 1 << 4;
1835
1836     /* DZP indicates whether DC ZVA access is allowed */
1837     if (aa64_zva_access(env, NULL) != CP_ACCESS_OK) {
1838         dzp_bit = 0;
1839     }
1840     return cpu->dcz_blocksize | dzp_bit;
1841 }
1842
1843 static CPAccessResult sp_el0_access(CPUARMState *env, const ARMCPRegInfo *ri)
1844 {
1845     if (!env->pstate & PSTATE_SP) {
1846         /* Access to SP_EL0 is undefined if it's being used as
1847          * the stack pointer.
1848          */
1849         return CP_ACCESS_TRAP_UNCATEGORIZED;
1850     }
1851     return CP_ACCESS_OK;
1852 }
1853
1854 static uint64_t spsel_read(CPUARMState *env, const ARMCPRegInfo *ri)
1855 {
1856     return env->pstate & PSTATE_SP;
1857 }
1858
1859 static void spsel_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t val)
1860 {
1861     update_spsel(env, val);
1862 }
1863
1864 static const ARMCPRegInfo v8_cp_reginfo[] = {
1865     /* Minimal set of EL0-visible registers. This will need to be expanded
1866      * significantly for system emulation of AArch64 CPUs.
1867      */
1868     { .name = "NZCV", .state = ARM_CP_STATE_AA64,
1869       .opc0 = 3, .opc1 = 3, .opc2 = 0, .crn = 4, .crm = 2,
1870       .access = PL0_RW, .type = ARM_CP_NZCV },
1871     { .name = "DAIF", .state = ARM_CP_STATE_AA64,
1872       .opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 4, .crm = 2,
1873       .type = ARM_CP_NO_MIGRATE,
1874       .access = PL0_RW, .accessfn = aa64_daif_access,
1875       .fieldoffset = offsetof(CPUARMState, daif),
1876       .writefn = aa64_daif_write, .resetfn = arm_cp_reset_ignore },
1877     { .name = "FPCR", .state = ARM_CP_STATE_AA64,
1878       .opc0 = 3, .opc1 = 3, .opc2 = 0, .crn = 4, .crm = 4,
1879       .access = PL0_RW, .readfn = aa64_fpcr_read, .writefn = aa64_fpcr_write },
1880     { .name = "FPSR", .state = ARM_CP_STATE_AA64,
1881       .opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 4, .crm = 4,
1882       .access = PL0_RW, .readfn = aa64_fpsr_read, .writefn = aa64_fpsr_write },
1883     { .name = "DCZID_EL0", .state = ARM_CP_STATE_AA64,
1884       .opc0 = 3, .opc1 = 3, .opc2 = 7, .crn = 0, .crm = 0,
1885       .access = PL0_R, .type = ARM_CP_NO_MIGRATE,
1886       .readfn = aa64_dczid_read },
1887     { .name = "DC_ZVA", .state = ARM_CP_STATE_AA64,
1888       .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 4, .opc2 = 1,
1889       .access = PL0_W, .type = ARM_CP_DC_ZVA,
1890 #ifndef CONFIG_USER_ONLY
1891       /* Avoid overhead of an access check that always passes in user-mode */
1892       .accessfn = aa64_zva_access,
1893 #endif
1894     },
1895     { .name = "CURRENTEL", .state = ARM_CP_STATE_AA64,
1896       .opc0 = 3, .opc1 = 0, .opc2 = 2, .crn = 4, .crm = 2,
1897       .access = PL1_R, .type = ARM_CP_CURRENTEL },
1898     /* Cache ops: all NOPs since we don't emulate caches */
1899     { .name = "IC_IALLUIS", .state = ARM_CP_STATE_AA64,
1900       .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 1, .opc2 = 0,
1901       .access = PL1_W, .type = ARM_CP_NOP },
1902     { .name = "IC_IALLU", .state = ARM_CP_STATE_AA64,
1903       .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 0,
1904       .access = PL1_W, .type = ARM_CP_NOP },
1905     { .name = "IC_IVAU", .state = ARM_CP_STATE_AA64,
1906       .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 5, .opc2 = 1,
1907       .access = PL0_W, .type = ARM_CP_NOP,
1908       .accessfn = aa64_cacheop_access },
1909     { .name = "DC_IVAC", .state = ARM_CP_STATE_AA64,
1910       .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 1,
1911       .access = PL1_W, .type = ARM_CP_NOP },
1912     { .name = "DC_ISW", .state = ARM_CP_STATE_AA64,
1913       .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 2,
1914       .access = PL1_W, .type = ARM_CP_NOP },
1915     { .name = "DC_CVAC", .state = ARM_CP_STATE_AA64,
1916       .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 10, .opc2 = 1,
1917       .access = PL0_W, .type = ARM_CP_NOP,
1918       .accessfn = aa64_cacheop_access },
1919     { .name = "DC_CSW", .state = ARM_CP_STATE_AA64,
1920       .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 10, .opc2 = 2,
1921       .access = PL1_W, .type = ARM_CP_NOP },
1922     { .name = "DC_CVAU", .state = ARM_CP_STATE_AA64,
1923       .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 11, .opc2 = 1,
1924       .access = PL0_W, .type = ARM_CP_NOP,
1925       .accessfn = aa64_cacheop_access },
1926     { .name = "DC_CIVAC", .state = ARM_CP_STATE_AA64,
1927       .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 14, .opc2 = 1,
1928       .access = PL0_W, .type = ARM_CP_NOP,
1929       .accessfn = aa64_cacheop_access },
1930     { .name = "DC_CISW", .state = ARM_CP_STATE_AA64,
1931       .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 14, .opc2 = 2,
1932       .access = PL1_W, .type = ARM_CP_NOP },
1933     /* TLBI operations */
1934     { .name = "TLBI_VMALLE1IS", .state = ARM_CP_STATE_AA64,
1935       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 0,
1936       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1937       .writefn = tlbiall_write },
1938     { .name = "TLBI_VAE1IS", .state = ARM_CP_STATE_AA64,
1939       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 1,
1940       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1941       .writefn = tlbi_aa64_va_write },
1942     { .name = "TLBI_ASIDE1IS", .state = ARM_CP_STATE_AA64,
1943       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 2,
1944       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1945       .writefn = tlbi_aa64_asid_write },
1946     { .name = "TLBI_VAAE1IS", .state = ARM_CP_STATE_AA64,
1947       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 3,
1948       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1949       .writefn = tlbi_aa64_vaa_write },
1950     { .name = "TLBI_VALE1IS", .state = ARM_CP_STATE_AA64,
1951       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 5,
1952       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1953       .writefn = tlbi_aa64_va_write },
1954     { .name = "TLBI_VAALE1IS", .state = ARM_CP_STATE_AA64,
1955       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 7,
1956       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1957       .writefn = tlbi_aa64_vaa_write },
1958     { .name = "TLBI_VMALLE1", .state = ARM_CP_STATE_AA64,
1959       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 0,
1960       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1961       .writefn = tlbiall_write },
1962     { .name = "TLBI_VAE1", .state = ARM_CP_STATE_AA64,
1963       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 1,
1964       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1965       .writefn = tlbi_aa64_va_write },
1966     { .name = "TLBI_ASIDE1", .state = ARM_CP_STATE_AA64,
1967       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 2,
1968       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1969       .writefn = tlbi_aa64_asid_write },
1970     { .name = "TLBI_VAAE1", .state = ARM_CP_STATE_AA64,
1971       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 3,
1972       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1973       .writefn = tlbi_aa64_vaa_write },
1974     { .name = "TLBI_VALE1", .state = ARM_CP_STATE_AA64,
1975       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 5,
1976       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1977       .writefn = tlbi_aa64_va_write },
1978     { .name = "TLBI_VAALE1", .state = ARM_CP_STATE_AA64,
1979       .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 7,
1980       .access = PL1_W, .type = ARM_CP_NO_MIGRATE,
1981       .writefn = tlbi_aa64_vaa_write },
1982 #ifndef CONFIG_USER_ONLY
1983     /* 64 bit address translation operations */
1984     { .name = "AT_S1E1R", .state = ARM_CP_STATE_AA64,
1985       .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 0,
1986       .access = PL1_W, .type = ARM_CP_NO_MIGRATE, .writefn = ats_write },
1987     { .name = "AT_S1E1W", .state = ARM_CP_STATE_AA64,
1988       .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 1,
1989       .access = PL1_W, .type = ARM_CP_NO_MIGRATE, .writefn = ats_write },
1990     { .name = "AT_S1E0R", .state = ARM_CP_STATE_AA64,
1991       .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 2,
1992       .access = PL1_W, .type = ARM_CP_NO_MIGRATE, .writefn = ats_write },
1993     { .name = "AT_S1E0W", .state = ARM_CP_STATE_AA64,
1994       .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 3,
1995       .access = PL1_W, .type = ARM_CP_NO_MIGRATE, .writefn = ats_write },
1996 #endif
1997     /* 32 bit TLB invalidates, Inner Shareable */
1998     { .name = "TLBIALLIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 0,
1999       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbiall_write },
2000     { .name = "TLBIMVAIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 1,
2001       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbimva_write },
2002     { .name = "TLBIASIDIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 2,
2003       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbiasid_write },
2004     { .name = "TLBIMVAAIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 3,
2005       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbimvaa_write },
2006     { .name = "TLBIMVALIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 5,
2007       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbimva_write },
2008     { .name = "TLBIMVAALIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 7,
2009       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbimvaa_write },
2010     /* 32 bit ITLB invalidates */
2011     { .name = "ITLBIALL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 5, .opc2 = 0,
2012       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbiall_write },
2013     { .name = "ITLBIMVA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 5, .opc2 = 1,
2014       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbimva_write },
2015     { .name = "ITLBIASID", .cp = 15, .opc1 = 0, .crn = 8, .crm = 5, .opc2 = 2,
2016       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbiasid_write },
2017     /* 32 bit DTLB invalidates */
2018     { .name = "DTLBIALL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 6, .opc2 = 0,
2019       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbiall_write },
2020     { .name = "DTLBIMVA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 6, .opc2 = 1,
2021       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbimva_write },
2022     { .name = "DTLBIASID", .cp = 15, .opc1 = 0, .crn = 8, .crm = 6, .opc2 = 2,
2023       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbiasid_write },
2024     /* 32 bit TLB invalidates */
2025     { .name = "TLBIALL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 0,
2026       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbiall_write },
2027     { .name = "TLBIMVA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 1,
2028       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbimva_write },
2029     { .name = "TLBIASID", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 2,
2030       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbiasid_write },
2031     { .name = "TLBIMVAA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 3,
2032       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbimvaa_write },
2033     { .name = "TLBIMVAL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 5,
2034       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbimva_write },
2035     { .name = "TLBIMVAAL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 7,
2036       .type = ARM_CP_NO_MIGRATE, .access = PL1_W, .writefn = tlbimvaa_write },
2037     /* 32 bit cache operations */
2038     { .name = "ICIALLUIS", .cp = 15, .opc1 = 0, .crn = 7, .crm = 1, .opc2 = 0,
2039       .type = ARM_CP_NOP, .access = PL1_W },
2040     { .name = "BPIALLUIS", .cp = 15, .opc1 = 0, .crn = 7, .crm = 1, .opc2 = 6,
2041       .type = ARM_CP_NOP, .access = PL1_W },
2042     { .name = "ICIALLU", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 0,
2043       .type = ARM_CP_NOP, .access = PL1_W },
2044     { .name = "ICIMVAU", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 1,
2045       .type = ARM_CP_NOP, .access = PL1_W },
2046     { .name = "BPIALL", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 6,
2047       .type = ARM_CP_NOP, .access = PL1_W },
2048     { .name = "BPIMVA", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 7,
2049       .type = ARM_CP_NOP, .access = PL1_W },
2050     { .name = "DCIMVAC", .cp = 15, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 1,
2051       .type = ARM_CP_NOP, .access = PL1_W },
2052     { .name = "DCISW", .cp = 15, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 2,
2053       .type = ARM_CP_NOP, .access = PL1_W },
2054     { .name = "DCCMVAC", .cp = 15, .opc1 = 0, .crn = 7, .crm = 10, .opc2 = 1,
2055       .type = ARM_CP_NOP, .access = PL1_W },
2056     { .name = "DCCSW", .cp = 15, .opc1 = 0, .crn = 7, .crm = 10, .opc2 = 2,
2057       .type = ARM_CP_NOP, .access = PL1_W },
2058     { .name = "DCCMVAU", .cp = 15, .opc1 = 0, .crn = 7, .crm = 11, .opc2 = 1,
2059       .type = ARM_CP_NOP, .access = PL1_W },
2060     { .name = "DCCIMVAC", .cp = 15, .opc1 = 0, .crn = 7, .crm = 14, .opc2 = 1,
2061       .type = ARM_CP_NOP, .access = PL1_W },
2062     { .name = "DCCISW", .cp = 15, .opc1 = 0, .crn = 7, .crm = 14, .opc2 = 2,
2063       .type = ARM_CP_NOP, .access = PL1_W },
2064     /* MMU Domain access control / MPU write buffer control */
2065     { .name = "DACR", .cp = 15,
2066       .opc1 = 0, .crn = 3, .crm = 0, .opc2 = 0,
2067       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c3),
2068       .resetvalue = 0, .writefn = dacr_write, .raw_writefn = raw_write, },
2069     /* Dummy implementation of monitor debug system control register:
2070      * we don't support debug.
2071      */
2072     { .name = "MDSCR_EL1", .state = ARM_CP_STATE_AA64,
2073       .opc0 = 2, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 2,
2074       .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
2075     /* We define a dummy WI OSLAR_EL1, because Linux writes to it. */
2076     { .name = "OSLAR_EL1", .state = ARM_CP_STATE_AA64,
2077       .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 4,
2078       .access = PL1_W, .type = ARM_CP_NOP },
2079     { .name = "ELR_EL1", .state = ARM_CP_STATE_AA64,
2080       .type = ARM_CP_NO_MIGRATE,
2081       .opc0 = 3, .opc1 = 0, .crn = 4, .crm = 0, .opc2 = 1,
2082       .access = PL1_RW,
2083       .fieldoffset = offsetof(CPUARMState, elr_el[1]) },
2084     { .name = "SPSR_EL1", .state = ARM_CP_STATE_AA64,
2085       .type = ARM_CP_NO_MIGRATE,
2086       .opc0 = 3, .opc1 = 0, .crn = 4, .crm = 0, .opc2 = 0,
2087       .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, banked_spsr[0]) },
2088     /* We rely on the access checks not allowing the guest to write to the
2089      * state field when SPSel indicates that it's being used as the stack
2090      * pointer.
2091      */
2092     { .name = "SP_EL0", .state = ARM_CP_STATE_AA64,
2093       .opc0 = 3, .opc1 = 0, .crn = 4, .crm = 1, .opc2 = 0,
2094       .access = PL1_RW, .accessfn = sp_el0_access,
2095       .type = ARM_CP_NO_MIGRATE,
2096       .fieldoffset = offsetof(CPUARMState, sp_el[0]) },
2097     { .name = "SPSel", .state = ARM_CP_STATE_AA64,
2098       .opc0 = 3, .opc1 = 0, .crn = 4, .crm = 2, .opc2 = 0,
2099       .type = ARM_CP_NO_MIGRATE,
2100       .access = PL1_RW, .readfn = spsel_read, .writefn = spsel_write },
2101     REGINFO_SENTINEL
2102 };
2103
2104 /* Used to describe the behaviour of EL2 regs when EL2 does not exist.  */
2105 static const ARMCPRegInfo v8_el3_no_el2_cp_reginfo[] = {
2106     { .name = "VBAR_EL2", .state = ARM_CP_STATE_AA64,
2107       .opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 0,
2108       .access = PL2_RW,
2109       .readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore },
2110     REGINFO_SENTINEL
2111 };
2112
2113 static const ARMCPRegInfo v8_el2_cp_reginfo[] = {
2114     { .name = "ELR_EL2", .state = ARM_CP_STATE_AA64,
2115       .type = ARM_CP_NO_MIGRATE,
2116       .opc0 = 3, .opc1 = 4, .crn = 4, .crm = 0, .opc2 = 1,
2117       .access = PL2_RW,
2118       .fieldoffset = offsetof(CPUARMState, elr_el[2]) },
2119     { .name = "SPSR_EL2", .state = ARM_CP_STATE_AA64,
2120       .type = ARM_CP_NO_MIGRATE,
2121       .opc0 = 3, .opc1 = 4, .crn = 4, .crm = 0, .opc2 = 0,
2122       .access = PL2_RW, .fieldoffset = offsetof(CPUARMState, banked_spsr[6]) },
2123     { .name = "VBAR_EL2", .state = ARM_CP_STATE_AA64,
2124       .opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 0,
2125       .access = PL2_RW, .writefn = vbar_write,
2126       .fieldoffset = offsetof(CPUARMState, cp15.vbar_el[2]),
2127       .resetvalue = 0 },
2128     REGINFO_SENTINEL
2129 };
2130
2131 static const ARMCPRegInfo v8_el3_cp_reginfo[] = {
2132     { .name = "ELR_EL3", .state = ARM_CP_STATE_AA64,
2133       .type = ARM_CP_NO_MIGRATE,
2134       .opc0 = 3, .opc1 = 6, .crn = 4, .crm = 0, .opc2 = 1,
2135       .access = PL3_RW,
2136       .fieldoffset = offsetof(CPUARMState, elr_el[3]) },
2137     { .name = "SPSR_EL3", .state = ARM_CP_STATE_AA64,
2138       .type = ARM_CP_NO_MIGRATE,
2139       .opc0 = 3, .opc1 = 6, .crn = 4, .crm = 0, .opc2 = 0,
2140       .access = PL3_RW, .fieldoffset = offsetof(CPUARMState, banked_spsr[7]) },
2141     { .name = "VBAR_EL3", .state = ARM_CP_STATE_AA64,
2142       .opc0 = 3, .opc1 = 6, .crn = 12, .crm = 0, .opc2 = 0,
2143       .access = PL3_RW, .writefn = vbar_write,
2144       .fieldoffset = offsetof(CPUARMState, cp15.vbar_el[3]),
2145       .resetvalue = 0 },
2146     REGINFO_SENTINEL
2147 };
2148
2149 static void sctlr_write(CPUARMState *env, const ARMCPRegInfo *ri,
2150                         uint64_t value)
2151 {
2152     ARMCPU *cpu = arm_env_get_cpu(env);
2153
2154     if (raw_read(env, ri) == value) {
2155         /* Skip the TLB flush if nothing actually changed; Linux likes
2156          * to do a lot of pointless SCTLR writes.
2157          */
2158         return;
2159     }
2160
2161     raw_write(env, ri, value);
2162     /* ??? Lots of these bits are not implemented.  */
2163     /* This may enable/disable the MMU, so do a TLB flush.  */
2164     tlb_flush(CPU(cpu), 1);
2165 }
2166
2167 static CPAccessResult ctr_el0_access(CPUARMState *env, const ARMCPRegInfo *ri)
2168 {
2169     /* Only accessible in EL0 if SCTLR.UCT is set (and only in AArch64,
2170      * but the AArch32 CTR has its own reginfo struct)
2171      */
2172     if (arm_current_pl(env) == 0 && !(env->cp15.c1_sys & SCTLR_UCT)) {
2173         return CP_ACCESS_TRAP;
2174     }
2175     return CP_ACCESS_OK;
2176 }
2177
2178 static void define_aarch64_debug_regs(ARMCPU *cpu)
2179 {
2180     /* Define breakpoint and watchpoint registers. These do nothing
2181      * but read as written, for now.
2182      */
2183     int i;
2184
2185     for (i = 0; i < 16; i++) {
2186         ARMCPRegInfo dbgregs[] = {
2187             { .name = "DBGBVR", .state = ARM_CP_STATE_AA64,
2188               .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 4,
2189               .access = PL1_RW,
2190               .fieldoffset = offsetof(CPUARMState, cp15.dbgbvr[i]) },
2191             { .name = "DBGBCR", .state = ARM_CP_STATE_AA64,
2192               .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 5,
2193               .access = PL1_RW,
2194               .fieldoffset = offsetof(CPUARMState, cp15.dbgbcr[i]) },
2195             { .name = "DBGWVR", .state = ARM_CP_STATE_AA64,
2196               .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 6,
2197               .access = PL1_RW,
2198               .fieldoffset = offsetof(CPUARMState, cp15.dbgwvr[i]) },
2199             { .name = "DBGWCR", .state = ARM_CP_STATE_AA64,
2200               .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 7,
2201               .access = PL1_RW,
2202               .fieldoffset = offsetof(CPUARMState, cp15.dbgwcr[i]) },
2203                REGINFO_SENTINEL
2204         };
2205         define_arm_cp_regs(cpu, dbgregs);
2206     }
2207 }
2208
2209 void register_cp_regs_for_features(ARMCPU *cpu)
2210 {
2211     /* Register all the coprocessor registers based on feature bits */
2212     CPUARMState *env = &cpu->env;
2213     if (arm_feature(env, ARM_FEATURE_M)) {
2214         /* M profile has no coprocessor registers */
2215         return;
2216     }
2217
2218     define_arm_cp_regs(cpu, cp_reginfo);
2219     if (!arm_feature(env, ARM_FEATURE_V8)) {
2220         /* Must go early as it is full of wildcards that may be
2221          * overridden by later definitions.
2222          */
2223         define_arm_cp_regs(cpu, not_v8_cp_reginfo);
2224     }
2225
2226     if (arm_feature(env, ARM_FEATURE_V6)) {
2227         /* The ID registers all have impdef reset values */
2228         ARMCPRegInfo v6_idregs[] = {
2229             { .name = "ID_PFR0", .state = ARM_CP_STATE_BOTH,
2230               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 0,
2231               .access = PL1_R, .type = ARM_CP_CONST,
2232               .resetvalue = cpu->id_pfr0 },
2233             { .name = "ID_PFR1", .state = ARM_CP_STATE_BOTH,
2234               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 1,
2235               .access = PL1_R, .type = ARM_CP_CONST,
2236               .resetvalue = cpu->id_pfr1 },
2237             { .name = "ID_DFR0", .state = ARM_CP_STATE_BOTH,
2238               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 2,
2239               .access = PL1_R, .type = ARM_CP_CONST,
2240               .resetvalue = cpu->id_dfr0 },
2241             { .name = "ID_AFR0", .state = ARM_CP_STATE_BOTH,
2242               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 3,
2243               .access = PL1_R, .type = ARM_CP_CONST,
2244               .resetvalue = cpu->id_afr0 },
2245             { .name = "ID_MMFR0", .state = ARM_CP_STATE_BOTH,
2246               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 4,
2247               .access = PL1_R, .type = ARM_CP_CONST,
2248               .resetvalue = cpu->id_mmfr0 },
2249             { .name = "ID_MMFR1", .state = ARM_CP_STATE_BOTH,
2250               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 5,
2251               .access = PL1_R, .type = ARM_CP_CONST,
2252               .resetvalue = cpu->id_mmfr1 },
2253             { .name = "ID_MMFR2", .state = ARM_CP_STATE_BOTH,
2254               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 6,
2255               .access = PL1_R, .type = ARM_CP_CONST,
2256               .resetvalue = cpu->id_mmfr2 },
2257             { .name = "ID_MMFR3", .state = ARM_CP_STATE_BOTH,
2258               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 7,
2259               .access = PL1_R, .type = ARM_CP_CONST,
2260               .resetvalue = cpu->id_mmfr3 },
2261             { .name = "ID_ISAR0", .state = ARM_CP_STATE_BOTH,
2262               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 0,
2263               .access = PL1_R, .type = ARM_CP_CONST,
2264               .resetvalue = cpu->id_isar0 },
2265             { .name = "ID_ISAR1", .state = ARM_CP_STATE_BOTH,
2266               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 1,
2267               .access = PL1_R, .type = ARM_CP_CONST,
2268               .resetvalue = cpu->id_isar1 },
2269             { .name = "ID_ISAR2", .state = ARM_CP_STATE_BOTH,
2270               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 2,
2271               .access = PL1_R, .type = ARM_CP_CONST,
2272               .resetvalue = cpu->id_isar2 },
2273             { .name = "ID_ISAR3", .state = ARM_CP_STATE_BOTH,
2274               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 3,
2275               .access = PL1_R, .type = ARM_CP_CONST,
2276               .resetvalue = cpu->id_isar3 },
2277             { .name = "ID_ISAR4", .state = ARM_CP_STATE_BOTH,
2278               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 4,
2279               .access = PL1_R, .type = ARM_CP_CONST,
2280               .resetvalue = cpu->id_isar4 },
2281             { .name = "ID_ISAR5", .state = ARM_CP_STATE_BOTH,
2282               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 5,
2283               .access = PL1_R, .type = ARM_CP_CONST,
2284               .resetvalue = cpu->id_isar5 },
2285             /* 6..7 are as yet unallocated and must RAZ */
2286             { .name = "ID_ISAR6", .cp = 15, .crn = 0, .crm = 2,
2287               .opc1 = 0, .opc2 = 6, .access = PL1_R, .type = ARM_CP_CONST,
2288               .resetvalue = 0 },
2289             { .name = "ID_ISAR7", .cp = 15, .crn = 0, .crm = 2,
2290               .opc1 = 0, .opc2 = 7, .access = PL1_R, .type = ARM_CP_CONST,
2291               .resetvalue = 0 },
2292             REGINFO_SENTINEL
2293         };
2294         define_arm_cp_regs(cpu, v6_idregs);
2295         define_arm_cp_regs(cpu, v6_cp_reginfo);
2296     } else {
2297         define_arm_cp_regs(cpu, not_v6_cp_reginfo);
2298     }
2299     if (arm_feature(env, ARM_FEATURE_V6K)) {
2300         define_arm_cp_regs(cpu, v6k_cp_reginfo);
2301     }
2302     if (arm_feature(env, ARM_FEATURE_V7)) {
2303         /* v7 performance monitor control register: same implementor
2304          * field as main ID register, and we implement only the cycle
2305          * count register.
2306          */
2307 #ifndef CONFIG_USER_ONLY
2308         ARMCPRegInfo pmcr = {
2309             .name = "PMCR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 0,
2310             .access = PL0_RW, .resetvalue = cpu->midr & 0xff000000,
2311             .type = ARM_CP_IO,
2312             .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcr),
2313             .accessfn = pmreg_access, .writefn = pmcr_write,
2314             .raw_writefn = raw_write,
2315         };
2316         define_one_arm_cp_reg(cpu, &pmcr);
2317 #endif
2318         ARMCPRegInfo clidr = {
2319             .name = "CLIDR", .state = ARM_CP_STATE_BOTH,
2320             .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 1,
2321             .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->clidr
2322         };
2323         define_one_arm_cp_reg(cpu, &clidr);
2324         define_arm_cp_regs(cpu, v7_cp_reginfo);
2325     } else {
2326         define_arm_cp_regs(cpu, not_v7_cp_reginfo);
2327     }
2328     if (arm_feature(env, ARM_FEATURE_V8)) {
2329         /* AArch64 ID registers, which all have impdef reset values */
2330         ARMCPRegInfo v8_idregs[] = {
2331             { .name = "ID_AA64PFR0_EL1", .state = ARM_CP_STATE_AA64,
2332               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 0,
2333               .access = PL1_R, .type = ARM_CP_CONST,
2334               .resetvalue = cpu->id_aa64pfr0 },
2335             { .name = "ID_AA64PFR1_EL1", .state = ARM_CP_STATE_AA64,
2336               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 1,
2337               .access = PL1_R, .type = ARM_CP_CONST,
2338               .resetvalue = cpu->id_aa64pfr1},
2339             { .name = "ID_AA64DFR0_EL1", .state = ARM_CP_STATE_AA64,
2340               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 0,
2341               .access = PL1_R, .type = ARM_CP_CONST,
2342               /* We mask out the PMUVer field, beacuse we don't currently
2343                * implement the PMU. Not advertising it prevents the guest
2344                * from trying to use it and getting UNDEFs on registers we
2345                * don't implement.
2346                */
2347               .resetvalue = cpu->id_aa64dfr0 & ~0xf00 },
2348             { .name = "ID_AA64DFR1_EL1", .state = ARM_CP_STATE_AA64,
2349               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 1,
2350               .access = PL1_R, .type = ARM_CP_CONST,
2351               .resetvalue = cpu->id_aa64dfr1 },
2352             { .name = "ID_AA64AFR0_EL1", .state = ARM_CP_STATE_AA64,
2353               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 4,
2354               .access = PL1_R, .type = ARM_CP_CONST,
2355               .resetvalue = cpu->id_aa64afr0 },
2356             { .name = "ID_AA64AFR1_EL1", .state = ARM_CP_STATE_AA64,
2357               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 5,
2358               .access = PL1_R, .type = ARM_CP_CONST,
2359               .resetvalue = cpu->id_aa64afr1 },
2360             { .name = "ID_AA64ISAR0_EL1", .state = ARM_CP_STATE_AA64,
2361               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 0,
2362               .access = PL1_R, .type = ARM_CP_CONST,
2363               .resetvalue = cpu->id_aa64isar0 },
2364             { .name = "ID_AA64ISAR1_EL1", .state = ARM_CP_STATE_AA64,
2365               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 1,
2366               .access = PL1_R, .type = ARM_CP_CONST,
2367               .resetvalue = cpu->id_aa64isar1 },
2368             { .name = "ID_AA64MMFR0_EL1", .state = ARM_CP_STATE_AA64,
2369               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 0,
2370               .access = PL1_R, .type = ARM_CP_CONST,
2371               .resetvalue = cpu->id_aa64mmfr0 },
2372             { .name = "ID_AA64MMFR1_EL1", .state = ARM_CP_STATE_AA64,
2373               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 1,
2374               .access = PL1_R, .type = ARM_CP_CONST,
2375               .resetvalue = cpu->id_aa64mmfr1 },
2376             { .name = "MVFR0_EL1", .state = ARM_CP_STATE_AA64,
2377               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 0,
2378               .access = PL1_R, .type = ARM_CP_CONST,
2379               .resetvalue = cpu->mvfr0 },
2380             { .name = "MVFR1_EL1", .state = ARM_CP_STATE_AA64,
2381               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 1,
2382               .access = PL1_R, .type = ARM_CP_CONST,
2383               .resetvalue = cpu->mvfr1 },
2384             { .name = "MVFR2_EL1", .state = ARM_CP_STATE_AA64,
2385               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 2,
2386               .access = PL1_R, .type = ARM_CP_CONST,
2387               .resetvalue = cpu->mvfr2 },
2388             REGINFO_SENTINEL
2389         };
2390         ARMCPRegInfo rvbar = {
2391             .name = "RVBAR_EL1", .state = ARM_CP_STATE_AA64,
2392             .opc0 = 3, .opc1 = 0, .crn = 12, .crm = 0, .opc2 = 2,
2393             .type = ARM_CP_CONST, .access = PL1_R, .resetvalue = cpu->rvbar
2394         };
2395         define_one_arm_cp_reg(cpu, &rvbar);
2396         define_arm_cp_regs(cpu, v8_idregs);
2397         define_arm_cp_regs(cpu, v8_cp_reginfo);
2398         define_aarch64_debug_regs(cpu);
2399     }
2400     if (arm_feature(env, ARM_FEATURE_EL2)) {
2401         define_arm_cp_regs(cpu, v8_el2_cp_reginfo);
2402     } else {
2403         /* If EL2 is missing but higher ELs are enabled, we need to
2404          * register the no_el2 reginfos.
2405          */
2406         if (arm_feature(env, ARM_FEATURE_EL3)) {
2407             define_arm_cp_regs(cpu, v8_el3_no_el2_cp_reginfo);
2408         }
2409     }
2410     if (arm_feature(env, ARM_FEATURE_EL3)) {
2411         define_arm_cp_regs(cpu, v8_el3_cp_reginfo);
2412     }
2413     if (arm_feature(env, ARM_FEATURE_MPU)) {
2414         /* These are the MPU registers prior to PMSAv6. Any new
2415          * PMSA core later than the ARM946 will require that we
2416          * implement the PMSAv6 or PMSAv7 registers, which are
2417          * completely different.
2418          */
2419         assert(!arm_feature(env, ARM_FEATURE_V6));
2420         define_arm_cp_regs(cpu, pmsav5_cp_reginfo);
2421     } else {
2422         define_arm_cp_regs(cpu, vmsa_cp_reginfo);
2423     }
2424     if (arm_feature(env, ARM_FEATURE_THUMB2EE)) {
2425         define_arm_cp_regs(cpu, t2ee_cp_reginfo);
2426     }
2427     if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) {
2428         define_arm_cp_regs(cpu, generic_timer_cp_reginfo);
2429     }
2430     if (arm_feature(env, ARM_FEATURE_VAPA)) {
2431         define_arm_cp_regs(cpu, vapa_cp_reginfo);
2432     }
2433     if (arm_feature(env, ARM_FEATURE_CACHE_TEST_CLEAN)) {
2434         define_arm_cp_regs(cpu, cache_test_clean_cp_reginfo);
2435     }
2436     if (arm_feature(env, ARM_FEATURE_CACHE_DIRTY_REG)) {
2437         define_arm_cp_regs(cpu, cache_dirty_status_cp_reginfo);
2438     }
2439     if (arm_feature(env, ARM_FEATURE_CACHE_BLOCK_OPS)) {
2440         define_arm_cp_regs(cpu, cache_block_ops_cp_reginfo);
2441     }
2442     if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
2443         define_arm_cp_regs(cpu, omap_cp_reginfo);
2444     }
2445     if (arm_feature(env, ARM_FEATURE_STRONGARM)) {
2446         define_arm_cp_regs(cpu, strongarm_cp_reginfo);
2447     }
2448     if (arm_feature(env, ARM_FEATURE_XSCALE)) {
2449         define_arm_cp_regs(cpu, xscale_cp_reginfo);
2450     }
2451     if (arm_feature(env, ARM_FEATURE_DUMMY_C15_REGS)) {
2452         define_arm_cp_regs(cpu, dummy_c15_cp_reginfo);
2453     }
2454     if (arm_feature(env, ARM_FEATURE_LPAE)) {
2455         define_arm_cp_regs(cpu, lpae_cp_reginfo);
2456     }
2457     /* Slightly awkwardly, the OMAP and StrongARM cores need all of
2458      * cp15 crn=0 to be writes-ignored, whereas for other cores they should
2459      * be read-only (ie write causes UNDEF exception).
2460      */
2461     {
2462         ARMCPRegInfo id_pre_v8_midr_cp_reginfo[] = {
2463             /* Pre-v8 MIDR space.
2464              * Note that the MIDR isn't a simple constant register because
2465              * of the TI925 behaviour where writes to another register can
2466              * cause the MIDR value to change.
2467              *
2468              * Unimplemented registers in the c15 0 0 0 space default to
2469              * MIDR. Define MIDR first as this entire space, then CTR, TCMTR
2470              * and friends override accordingly.
2471              */
2472             { .name = "MIDR",
2473               .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = CP_ANY,
2474               .access = PL1_R, .resetvalue = cpu->midr,
2475               .writefn = arm_cp_write_ignore, .raw_writefn = raw_write,
2476               .fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid),
2477               .type = ARM_CP_OVERRIDE },
2478             /* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
2479             { .name = "DUMMY",
2480               .cp = 15, .crn = 0, .crm = 3, .opc1 = 0, .opc2 = CP_ANY,
2481               .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2482             { .name = "DUMMY",
2483               .cp = 15, .crn = 0, .crm = 4, .opc1 = 0, .opc2 = CP_ANY,
2484               .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2485             { .name = "DUMMY",
2486               .cp = 15, .crn = 0, .crm = 5, .opc1 = 0, .opc2 = CP_ANY,
2487               .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2488             { .name = "DUMMY",
2489               .cp = 15, .crn = 0, .crm = 6, .opc1 = 0, .opc2 = CP_ANY,
2490               .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2491             { .name = "DUMMY",
2492               .cp = 15, .crn = 0, .crm = 7, .opc1 = 0, .opc2 = CP_ANY,
2493               .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2494             REGINFO_SENTINEL
2495         };
2496         ARMCPRegInfo id_v8_midr_cp_reginfo[] = {
2497             /* v8 MIDR -- the wildcard isn't necessary, and nor is the
2498              * variable-MIDR TI925 behaviour. Instead we have a single
2499              * (strictly speaking IMPDEF) alias of the MIDR, REVIDR.
2500              */
2501             { .name = "MIDR_EL1", .state = ARM_CP_STATE_BOTH,
2502               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 0, .opc2 = 0,
2503               .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->midr },
2504             { .name = "REVIDR_EL1", .state = ARM_CP_STATE_BOTH,
2505               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 0, .opc2 = 6,
2506               .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->midr },
2507             REGINFO_SENTINEL
2508         };
2509         ARMCPRegInfo id_cp_reginfo[] = {
2510             /* These are common to v8 and pre-v8 */
2511             { .name = "CTR",
2512               .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 1,
2513               .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->ctr },
2514             { .name = "CTR_EL0", .state = ARM_CP_STATE_AA64,
2515               .opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 0, .crm = 0,
2516               .access = PL0_R, .accessfn = ctr_el0_access,
2517               .type = ARM_CP_CONST, .resetvalue = cpu->ctr },
2518             /* TCMTR and TLBTR exist in v8 but have no 64-bit versions */
2519             { .name = "TCMTR",
2520               .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 2,
2521               .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2522             { .name = "TLBTR",
2523               .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 3,
2524               .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
2525             REGINFO_SENTINEL
2526         };
2527         ARMCPRegInfo crn0_wi_reginfo = {
2528             .name = "CRN0_WI", .cp = 15, .crn = 0, .crm = CP_ANY,
2529             .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_W,
2530             .type = ARM_CP_NOP | ARM_CP_OVERRIDE
2531         };
2532         if (arm_feature(env, ARM_FEATURE_OMAPCP) ||
2533             arm_feature(env, ARM_FEATURE_STRONGARM)) {
2534             ARMCPRegInfo *r;
2535             /* Register the blanket "writes ignored" value first to cover the
2536              * whole space. Then update the specific ID registers to allow write
2537              * access, so that they ignore writes rather than causing them to
2538              * UNDEF.
2539              */
2540             define_one_arm_cp_reg(cpu, &crn0_wi_reginfo);
2541             for (r = id_pre_v8_midr_cp_reginfo;
2542                  r->type != ARM_CP_SENTINEL; r++) {
2543                 r->access = PL1_RW;
2544             }
2545             for (r = id_cp_reginfo; r->type != ARM_CP_SENTINEL; r++) {
2546                 r->access = PL1_RW;
2547             }
2548         }
2549         if (arm_feature(env, ARM_FEATURE_V8)) {
2550             define_arm_cp_regs(cpu, id_v8_midr_cp_reginfo);
2551         } else {
2552             define_arm_cp_regs(cpu, id_pre_v8_midr_cp_reginfo);
2553         }
2554         define_arm_cp_regs(cpu, id_cp_reginfo);
2555     }
2556
2557     if (arm_feature(env, ARM_FEATURE_MPIDR)) {
2558         define_arm_cp_regs(cpu, mpidr_cp_reginfo);
2559     }
2560
2561     if (arm_feature(env, ARM_FEATURE_AUXCR)) {
2562         ARMCPRegInfo auxcr = {
2563             .name = "ACTLR_EL1", .state = ARM_CP_STATE_BOTH,
2564             .opc0 = 3, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 1,
2565             .access = PL1_RW, .type = ARM_CP_CONST,
2566             .resetvalue = cpu->reset_auxcr
2567         };
2568         define_one_arm_cp_reg(cpu, &auxcr);
2569     }
2570
2571     if (arm_feature(env, ARM_FEATURE_CBAR)) {
2572         if (arm_feature(env, ARM_FEATURE_AARCH64)) {
2573             /* 32 bit view is [31:18] 0...0 [43:32]. */
2574             uint32_t cbar32 = (extract64(cpu->reset_cbar, 18, 14) << 18)
2575                 | extract64(cpu->reset_cbar, 32, 12);
2576             ARMCPRegInfo cbar_reginfo[] = {
2577                 { .name = "CBAR",
2578                   .type = ARM_CP_CONST,
2579                   .cp = 15, .crn = 15, .crm = 0, .opc1 = 4, .opc2 = 0,
2580                   .access = PL1_R, .resetvalue = cpu->reset_cbar },
2581                 { .name = "CBAR_EL1", .state = ARM_CP_STATE_AA64,
2582                   .type = ARM_CP_CONST,
2583                   .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 3, .opc2 = 0,
2584                   .access = PL1_R, .resetvalue = cbar32 },
2585                 REGINFO_SENTINEL
2586             };
2587             /* We don't implement a r/w 64 bit CBAR currently */
2588             assert(arm_feature(env, ARM_FEATURE_CBAR_RO));
2589             define_arm_cp_regs(cpu, cbar_reginfo);
2590         } else {
2591             ARMCPRegInfo cbar = {
2592                 .name = "CBAR",
2593                 .cp = 15, .crn = 15, .crm = 0, .opc1 = 4, .opc2 = 0,
2594                 .access = PL1_R|PL3_W, .resetvalue = cpu->reset_cbar,
2595                 .fieldoffset = offsetof(CPUARMState,
2596                                         cp15.c15_config_base_address)
2597             };
2598             if (arm_feature(env, ARM_FEATURE_CBAR_RO)) {
2599                 cbar.access = PL1_R;
2600                 cbar.fieldoffset = 0;
2601                 cbar.type = ARM_CP_CONST;
2602             }
2603             define_one_arm_cp_reg(cpu, &cbar);
2604         }
2605     }
2606
2607     /* Generic registers whose values depend on the implementation */
2608     {
2609         ARMCPRegInfo sctlr = {
2610             .name = "SCTLR", .state = ARM_CP_STATE_BOTH,
2611             .opc0 = 3, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
2612             .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_sys),
2613             .writefn = sctlr_write, .resetvalue = cpu->reset_sctlr,
2614             .raw_writefn = raw_write,
2615         };
2616         if (arm_feature(env, ARM_FEATURE_XSCALE)) {
2617             /* Normally we would always end the TB on an SCTLR write, but Linux
2618              * arch/arm/mach-pxa/sleep.S expects two instructions following
2619              * an MMU enable to execute from cache.  Imitate this behaviour.
2620              */
2621             sctlr.type |= ARM_CP_SUPPRESS_TB_END;
2622         }
2623         define_one_arm_cp_reg(cpu, &sctlr);
2624     }
2625 }
2626
2627 ARMCPU *cpu_arm_init(const char *cpu_model)
2628 {
2629     return ARM_CPU(cpu_generic_init(TYPE_ARM_CPU, cpu_model));
2630 }
2631
2632 void arm_cpu_register_gdb_regs_for_features(ARMCPU *cpu)
2633 {
2634     CPUState *cs = CPU(cpu);
2635     CPUARMState *env = &cpu->env;
2636
2637     if (arm_feature(env, ARM_FEATURE_AARCH64)) {
2638         gdb_register_coprocessor(cs, aarch64_fpu_gdb_get_reg,
2639                                  aarch64_fpu_gdb_set_reg,
2640                                  34, "aarch64-fpu.xml", 0);
2641     } else if (arm_feature(env, ARM_FEATURE_NEON)) {
2642         gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
2643                                  51, "arm-neon.xml", 0);
2644     } else if (arm_feature(env, ARM_FEATURE_VFP3)) {
2645         gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
2646                                  35, "arm-vfp3.xml", 0);
2647     } else if (arm_feature(env, ARM_FEATURE_VFP)) {
2648         gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
2649                                  19, "arm-vfp.xml", 0);
2650     }
2651 }
2652
2653 /* Sort alphabetically by type name, except for "any". */
2654 static gint arm_cpu_list_compare(gconstpointer a, gconstpointer b)
2655 {
2656     ObjectClass *class_a = (ObjectClass *)a;
2657     ObjectClass *class_b = (ObjectClass *)b;
2658     const char *name_a, *name_b;
2659
2660     name_a = object_class_get_name(class_a);
2661     name_b = object_class_get_name(class_b);
2662     if (strcmp(name_a, "any-" TYPE_ARM_CPU) == 0) {
2663         return 1;
2664     } else if (strcmp(name_b, "any-" TYPE_ARM_CPU) == 0) {
2665         return -1;
2666     } else {
2667         return strcmp(name_a, name_b);
2668     }
2669 }
2670
2671 static void arm_cpu_list_entry(gpointer data, gpointer user_data)
2672 {
2673     ObjectClass *oc = data;
2674     CPUListState *s = user_data;
2675     const char *typename;
2676     char *name;
2677
2678     typename = object_class_get_name(oc);
2679     name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_ARM_CPU));
2680     (*s->cpu_fprintf)(s->file, "  %s\n",
2681                       name);
2682     g_free(name);
2683 }
2684
2685 void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
2686 {
2687     CPUListState s = {
2688         .file = f,
2689         .cpu_fprintf = cpu_fprintf,
2690     };
2691     GSList *list;
2692
2693     list = object_class_get_list(TYPE_ARM_CPU, false);
2694     list = g_slist_sort(list, arm_cpu_list_compare);
2695     (*cpu_fprintf)(f, "Available CPUs:\n");
2696     g_slist_foreach(list, arm_cpu_list_entry, &s);
2697     g_slist_free(list);
2698 #ifdef CONFIG_KVM
2699     /* The 'host' CPU type is dynamically registered only if KVM is
2700      * enabled, so we have to special-case it here:
2701      */
2702     (*cpu_fprintf)(f, "  host (only available in KVM mode)\n");
2703 #endif
2704 }
2705
2706 static void arm_cpu_add_definition(gpointer data, gpointer user_data)
2707 {
2708     ObjectClass *oc = data;
2709     CpuDefinitionInfoList **cpu_list = user_data;
2710     CpuDefinitionInfoList *entry;
2711     CpuDefinitionInfo *info;
2712     const char *typename;
2713
2714     typename = object_class_get_name(oc);
2715     info = g_malloc0(sizeof(*info));
2716     info->name = g_strndup(typename,
2717                            strlen(typename) - strlen("-" TYPE_ARM_CPU));
2718
2719     entry = g_malloc0(sizeof(*entry));
2720     entry->value = info;
2721     entry->next = *cpu_list;
2722     *cpu_list = entry;
2723 }
2724
2725 CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
2726 {
2727     CpuDefinitionInfoList *cpu_list = NULL;
2728     GSList *list;
2729
2730     list = object_class_get_list(TYPE_ARM_CPU, false);
2731     g_slist_foreach(list, arm_cpu_add_definition, &cpu_list);
2732     g_slist_free(list);
2733
2734     return cpu_list;
2735 }
2736
2737 static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
2738                                    void *opaque, int state,
2739                                    int crm, int opc1, int opc2)
2740 {
2741     /* Private utility function for define_one_arm_cp_reg_with_opaque():
2742      * add a single reginfo struct to the hash table.
2743      */
2744     uint32_t *key = g_new(uint32_t, 1);
2745     ARMCPRegInfo *r2 = g_memdup(r, sizeof(ARMCPRegInfo));
2746     int is64 = (r->type & ARM_CP_64BIT) ? 1 : 0;
2747     if (r->state == ARM_CP_STATE_BOTH && state == ARM_CP_STATE_AA32) {
2748         /* The AArch32 view of a shared register sees the lower 32 bits
2749          * of a 64 bit backing field. It is not migratable as the AArch64
2750          * view handles that. AArch64 also handles reset.
2751          * We assume it is a cp15 register.
2752          */
2753         r2->cp = 15;
2754         r2->type |= ARM_CP_NO_MIGRATE;
2755         r2->resetfn = arm_cp_reset_ignore;
2756 #ifdef HOST_WORDS_BIGENDIAN
2757         if (r2->fieldoffset) {
2758             r2->fieldoffset += sizeof(uint32_t);
2759         }
2760 #endif
2761     }
2762     if (state == ARM_CP_STATE_AA64) {
2763         /* To allow abbreviation of ARMCPRegInfo
2764          * definitions, we treat cp == 0 as equivalent to
2765          * the value for "standard guest-visible sysreg".
2766          */
2767         if (r->cp == 0) {
2768             r2->cp = CP_REG_ARM64_SYSREG_CP;
2769         }
2770         *key = ENCODE_AA64_CP_REG(r2->cp, r2->crn, crm,
2771                                   r2->opc0, opc1, opc2);
2772     } else {
2773         *key = ENCODE_CP_REG(r2->cp, is64, r2->crn, crm, opc1, opc2);
2774     }
2775     if (opaque) {
2776         r2->opaque = opaque;
2777     }
2778     /* reginfo passed to helpers is correct for the actual access,
2779      * and is never ARM_CP_STATE_BOTH:
2780      */
2781     r2->state = state;
2782     /* Make sure reginfo passed to helpers for wildcarded regs
2783      * has the correct crm/opc1/opc2 for this reg, not CP_ANY:
2784      */
2785     r2->crm = crm;
2786     r2->opc1 = opc1;
2787     r2->opc2 = opc2;
2788     /* By convention, for wildcarded registers only the first
2789      * entry is used for migration; the others are marked as
2790      * NO_MIGRATE so we don't try to transfer the register
2791      * multiple times. Special registers (ie NOP/WFI) are
2792      * never migratable.
2793      */
2794     if ((r->type & ARM_CP_SPECIAL) ||
2795         ((r->crm == CP_ANY) && crm != 0) ||
2796         ((r->opc1 == CP_ANY) && opc1 != 0) ||
2797         ((r->opc2 == CP_ANY) && opc2 != 0)) {
2798         r2->type |= ARM_CP_NO_MIGRATE;
2799     }
2800
2801     /* Overriding of an existing definition must be explicitly
2802      * requested.
2803      */
2804     if (!(r->type & ARM_CP_OVERRIDE)) {
2805         ARMCPRegInfo *oldreg;
2806         oldreg = g_hash_table_lookup(cpu->cp_regs, key);
2807         if (oldreg && !(oldreg->type & ARM_CP_OVERRIDE)) {
2808             fprintf(stderr, "Register redefined: cp=%d %d bit "
2809                     "crn=%d crm=%d opc1=%d opc2=%d, "
2810                     "was %s, now %s\n", r2->cp, 32 + 32 * is64,
2811                     r2->crn, r2->crm, r2->opc1, r2->opc2,
2812                     oldreg->name, r2->name);
2813             g_assert_not_reached();
2814         }
2815     }
2816     g_hash_table_insert(cpu->cp_regs, key, r2);
2817 }
2818
2819
2820 void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
2821                                        const ARMCPRegInfo *r, void *opaque)
2822 {
2823     /* Define implementations of coprocessor registers.
2824      * We store these in a hashtable because typically
2825      * there are less than 150 registers in a space which
2826      * is 16*16*16*8*8 = 262144 in size.
2827      * Wildcarding is supported for the crm, opc1 and opc2 fields.
2828      * If a register is defined twice then the second definition is
2829      * used, so this can be used to define some generic registers and
2830      * then override them with implementation specific variations.
2831      * At least one of the original and the second definition should
2832      * include ARM_CP_OVERRIDE in its type bits -- this is just a guard
2833      * against accidental use.
2834      *
2835      * The state field defines whether the register is to be
2836      * visible in the AArch32 or AArch64 execution state. If the
2837      * state is set to ARM_CP_STATE_BOTH then we synthesise a
2838      * reginfo structure for the AArch32 view, which sees the lower
2839      * 32 bits of the 64 bit register.
2840      *
2841      * Only registers visible in AArch64 may set r->opc0; opc0 cannot
2842      * be wildcarded. AArch64 registers are always considered to be 64
2843      * bits; the ARM_CP_64BIT* flag applies only to the AArch32 view of
2844      * the register, if any.
2845      */
2846     int crm, opc1, opc2, state;
2847     int crmmin = (r->crm == CP_ANY) ? 0 : r->crm;
2848     int crmmax = (r->crm == CP_ANY) ? 15 : r->crm;
2849     int opc1min = (r->opc1 == CP_ANY) ? 0 : r->opc1;
2850     int opc1max = (r->opc1 == CP_ANY) ? 7 : r->opc1;
2851     int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2;
2852     int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2;
2853     /* 64 bit registers have only CRm and Opc1 fields */
2854     assert(!((r->type & ARM_CP_64BIT) && (r->opc2 || r->crn)));
2855     /* op0 only exists in the AArch64 encodings */
2856     assert((r->state != ARM_CP_STATE_AA32) || (r->opc0 == 0));
2857     /* AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless */
2858     assert((r->state != ARM_CP_STATE_AA64) || !(r->type & ARM_CP_64BIT));
2859     /* The AArch64 pseudocode CheckSystemAccess() specifies that op1
2860      * encodes a minimum access level for the register. We roll this
2861      * runtime check into our general permission check code, so check
2862      * here that the reginfo's specified permissions are strict enough
2863      * to encompass the generic architectural permission check.
2864      */
2865     if (r->state != ARM_CP_STATE_AA32) {
2866         int mask = 0;
2867         switch (r->opc1) {
2868         case 0: case 1: case 2:
2869             /* min_EL EL1 */
2870             mask = PL1_RW;
2871             break;
2872         case 3:
2873             /* min_EL EL0 */
2874             mask = PL0_RW;
2875             break;
2876         case 4:
2877             /* min_EL EL2 */
2878             mask = PL2_RW;
2879             break;
2880         case 5:
2881             /* unallocated encoding, so not possible */
2882             assert(false);
2883             break;
2884         case 6:
2885             /* min_EL EL3 */
2886             mask = PL3_RW;
2887             break;
2888         case 7:
2889             /* min_EL EL1, secure mode only (we don't check the latter) */
2890             mask = PL1_RW;
2891             break;
2892         default:
2893             /* broken reginfo with out-of-range opc1 */
2894             assert(false);
2895             break;
2896         }
2897         /* assert our permissions are not too lax (stricter is fine) */
2898         assert((r->access & ~mask) == 0);
2899     }
2900
2901     /* Check that the register definition has enough info to handle
2902      * reads and writes if they are permitted.
2903      */
2904     if (!(r->type & (ARM_CP_SPECIAL|ARM_CP_CONST))) {
2905         if (r->access & PL3_R) {
2906             assert(r->fieldoffset || r->readfn);
2907         }
2908         if (r->access & PL3_W) {
2909             assert(r->fieldoffset || r->writefn);
2910         }
2911     }
2912     /* Bad type field probably means missing sentinel at end of reg list */
2913     assert(cptype_valid(r->type));
2914     for (crm = crmmin; crm <= crmmax; crm++) {
2915         for (opc1 = opc1min; opc1 <= opc1max; opc1++) {
2916             for (opc2 = opc2min; opc2 <= opc2max; opc2++) {
2917                 for (state = ARM_CP_STATE_AA32;
2918                      state <= ARM_CP_STATE_AA64; state++) {
2919                     if (r->state != state && r->state != ARM_CP_STATE_BOTH) {
2920                         continue;
2921                     }
2922                     add_cpreg_to_hashtable(cpu, r, opaque, state,
2923                                            crm, opc1, opc2);
2924                 }
2925             }
2926         }
2927     }
2928 }
2929
2930 void define_arm_cp_regs_with_opaque(ARMCPU *cpu,
2931                                     const ARMCPRegInfo *regs, void *opaque)
2932 {
2933     /* Define a whole list of registers */
2934     const ARMCPRegInfo *r;
2935     for (r = regs; r->type != ARM_CP_SENTINEL; r++) {
2936         define_one_arm_cp_reg_with_opaque(cpu, r, opaque);
2937     }
2938 }
2939
2940 const ARMCPRegInfo *get_arm_cp_reginfo(GHashTable *cpregs, uint32_t encoded_cp)
2941 {
2942     return g_hash_table_lookup(cpregs, &encoded_cp);
2943 }
2944
2945 void arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri,
2946                          uint64_t value)
2947 {
2948     /* Helper coprocessor write function for write-ignore registers */
2949 }
2950
2951 uint64_t arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri)
2952 {
2953     /* Helper coprocessor write function for read-as-zero registers */
2954     return 0;
2955 }
2956
2957 void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *opaque)
2958 {
2959     /* Helper coprocessor reset function for do-nothing-on-reset registers */
2960 }
2961
2962 static int bad_mode_switch(CPUARMState *env, int mode)
2963 {
2964     /* Return true if it is not valid for us to switch to
2965      * this CPU mode (ie all the UNPREDICTABLE cases in
2966      * the ARM ARM CPSRWriteByInstr pseudocode).
2967      */
2968     switch (mode) {
2969     case ARM_CPU_MODE_USR:
2970     case ARM_CPU_MODE_SYS:
2971     case ARM_CPU_MODE_SVC:
2972     case ARM_CPU_MODE_ABT:
2973     case ARM_CPU_MODE_UND:
2974     case ARM_CPU_MODE_IRQ:
2975     case ARM_CPU_MODE_FIQ:
2976         return 0;
2977     default:
2978         return 1;
2979     }
2980 }
2981
2982 uint32_t cpsr_read(CPUARMState *env)
2983 {
2984     int ZF;
2985     ZF = (env->ZF == 0);
2986     return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) |
2987         (env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27)
2988         | (env->thumb << 5) | ((env->condexec_bits & 3) << 25)
2989         | ((env->condexec_bits & 0xfc) << 8)
2990         | (env->GE << 16) | (env->daif & CPSR_AIF);
2991 }
2992
2993 void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
2994 {
2995     if (mask & CPSR_NZCV) {
2996         env->ZF = (~val) & CPSR_Z;
2997         env->NF = val;
2998         env->CF = (val >> 29) & 1;
2999         env->VF = (val << 3) & 0x80000000;
3000     }
3001     if (mask & CPSR_Q)
3002         env->QF = ((val & CPSR_Q) != 0);
3003     if (mask & CPSR_T)
3004         env->thumb = ((val & CPSR_T) != 0);
3005     if (mask & CPSR_IT_0_1) {
3006         env->condexec_bits &= ~3;
3007         env->condexec_bits |= (val >> 25) & 3;
3008     }
3009     if (mask & CPSR_IT_2_7) {
3010         env->condexec_bits &= 3;
3011         env->condexec_bits |= (val >> 8) & 0xfc;
3012     }
3013     if (mask & CPSR_GE) {
3014         env->GE = (val >> 16) & 0xf;
3015     }
3016
3017     env->daif &= ~(CPSR_AIF & mask);
3018     env->daif |= val & CPSR_AIF & mask;
3019
3020     if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
3021         if (bad_mode_switch(env, val & CPSR_M)) {
3022             /* Attempt to switch to an invalid mode: this is UNPREDICTABLE.
3023              * We choose to ignore the attempt and leave the CPSR M field
3024              * untouched.
3025              */
3026             mask &= ~CPSR_M;
3027         } else {
3028             switch_mode(env, val & CPSR_M);
3029         }
3030     }
3031     mask &= ~CACHED_CPSR_BITS;
3032     env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask);
3033 }
3034
3035 /* Sign/zero extend */
3036 uint32_t HELPER(sxtb16)(uint32_t x)
3037 {
3038     uint32_t res;
3039     res = (uint16_t)(int8_t)x;
3040     res |= (uint32_t)(int8_t)(x >> 16) << 16;
3041     return res;
3042 }
3043
3044 uint32_t HELPER(uxtb16)(uint32_t x)
3045 {
3046     uint32_t res;
3047     res = (uint16_t)(uint8_t)x;
3048     res |= (uint32_t)(uint8_t)(x >> 16) << 16;
3049     return res;
3050 }
3051
3052 uint32_t HELPER(clz)(uint32_t x)
3053 {
3054     return clz32(x);
3055 }
3056
3057 int32_t HELPER(sdiv)(int32_t num, int32_t den)
3058 {
3059     if (den == 0)
3060       return 0;
3061     if (num == INT_MIN && den == -1)
3062       return INT_MIN;
3063     return num / den;
3064 }
3065
3066 uint32_t HELPER(udiv)(uint32_t num, uint32_t den)
3067 {
3068     if (den == 0)
3069       return 0;
3070     return num / den;
3071 }
3072
3073 uint32_t HELPER(rbit)(uint32_t x)
3074 {
3075     x =  ((x & 0xff000000) >> 24)
3076        | ((x & 0x00ff0000) >> 8)
3077        | ((x & 0x0000ff00) << 8)
3078        | ((x & 0x000000ff) << 24);
3079     x =  ((x & 0xf0f0f0f0) >> 4)
3080        | ((x & 0x0f0f0f0f) << 4);
3081     x =  ((x & 0x88888888) >> 3)
3082        | ((x & 0x44444444) >> 1)
3083        | ((x & 0x22222222) << 1)
3084        | ((x & 0x11111111) << 3);
3085     return x;
3086 }
3087
3088 #if defined(CONFIG_USER_ONLY)
3089
3090 void arm_cpu_do_interrupt(CPUState *cs)
3091 {
3092     cs->exception_index = -1;
3093 }
3094
3095 int arm_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
3096                              int mmu_idx)
3097 {
3098     ARMCPU *cpu = ARM_CPU(cs);
3099     CPUARMState *env = &cpu->env;
3100
3101     env->exception.vaddress = address;
3102     if (rw == 2) {
3103         cs->exception_index = EXCP_PREFETCH_ABORT;
3104     } else {
3105         cs->exception_index = EXCP_DATA_ABORT;
3106     }
3107     return 1;
3108 }
3109
3110 /* These should probably raise undefined insn exceptions.  */
3111 void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
3112 {
3113     ARMCPU *cpu = arm_env_get_cpu(env);
3114
3115     cpu_abort(CPU(cpu), "v7m_msr %d\n", reg);
3116 }
3117
3118 uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg)
3119 {
3120     ARMCPU *cpu = arm_env_get_cpu(env);
3121
3122     cpu_abort(CPU(cpu), "v7m_mrs %d\n", reg);
3123     return 0;
3124 }
3125
3126 void switch_mode(CPUARMState *env, int mode)
3127 {
3128     ARMCPU *cpu = arm_env_get_cpu(env);
3129
3130     if (mode != ARM_CPU_MODE_USR) {
3131         cpu_abort(CPU(cpu), "Tried to switch out of user mode\n");
3132     }
3133 }
3134
3135 void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
3136 {
3137     ARMCPU *cpu = arm_env_get_cpu(env);
3138
3139     cpu_abort(CPU(cpu), "banked r13 write\n");
3140 }
3141
3142 uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
3143 {
3144     ARMCPU *cpu = arm_env_get_cpu(env);
3145
3146     cpu_abort(CPU(cpu), "banked r13 read\n");
3147     return 0;
3148 }
3149
3150 #else
3151
3152 /* Map CPU modes onto saved register banks.  */
3153 int bank_number(int mode)
3154 {
3155     switch (mode) {
3156     case ARM_CPU_MODE_USR:
3157     case ARM_CPU_MODE_SYS:
3158         return 0;
3159     case ARM_CPU_MODE_SVC:
3160         return 1;
3161     case ARM_CPU_MODE_ABT:
3162         return 2;
3163     case ARM_CPU_MODE_UND:
3164         return 3;
3165     case ARM_CPU_MODE_IRQ:
3166         return 4;
3167     case ARM_CPU_MODE_FIQ:
3168         return 5;
3169     case ARM_CPU_MODE_HYP:
3170         return 6;
3171     case ARM_CPU_MODE_MON:
3172         return 7;
3173     }
3174     hw_error("bank number requested for bad CPSR mode value 0x%x\n", mode);
3175 }
3176
3177 void switch_mode(CPUARMState *env, int mode)
3178 {
3179     int old_mode;
3180     int i;
3181
3182     old_mode = env->uncached_cpsr & CPSR_M;
3183     if (mode == old_mode)
3184         return;
3185
3186     if (old_mode == ARM_CPU_MODE_FIQ) {
3187         memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t));
3188         memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t));
3189     } else if (mode == ARM_CPU_MODE_FIQ) {
3190         memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t));
3191         memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t));
3192     }
3193
3194     i = bank_number(old_mode);
3195     env->banked_r13[i] = env->regs[13];
3196     env->banked_r14[i] = env->regs[14];
3197     env->banked_spsr[i] = env->spsr;
3198
3199     i = bank_number(mode);
3200     env->regs[13] = env->banked_r13[i];
3201     env->regs[14] = env->banked_r14[i];
3202     env->spsr = env->banked_spsr[i];
3203 }
3204
3205 static void v7m_push(CPUARMState *env, uint32_t val)
3206 {
3207     CPUState *cs = CPU(arm_env_get_cpu(env));
3208
3209     env->regs[13] -= 4;
3210     stl_phys(cs->as, env->regs[13], val);
3211 }
3212
3213 static uint32_t v7m_pop(CPUARMState *env)
3214 {
3215     CPUState *cs = CPU(arm_env_get_cpu(env));
3216     uint32_t val;
3217
3218     val = ldl_phys(cs->as, env->regs[13]);
3219     env->regs[13] += 4;
3220     return val;
3221 }
3222
3223 /* Switch to V7M main or process stack pointer.  */
3224 static void switch_v7m_sp(CPUARMState *env, int process)
3225 {
3226     uint32_t tmp;
3227     if (env->v7m.current_sp != process) {
3228         tmp = env->v7m.other_sp;
3229         env->v7m.other_sp = env->regs[13];
3230         env->regs[13] = tmp;
3231         env->v7m.current_sp = process;
3232     }
3233 }
3234
3235 static void do_v7m_exception_exit(CPUARMState *env)
3236 {
3237     uint32_t type;
3238     uint32_t xpsr;
3239
3240     type = env->regs[15];
3241     if (env->v7m.exception != 0)
3242         armv7m_nvic_complete_irq(env->nvic, env->v7m.exception);
3243
3244     /* Switch to the target stack.  */
3245     switch_v7m_sp(env, (type & 4) != 0);
3246     /* Pop registers.  */
3247     env->regs[0] = v7m_pop(env);
3248     env->regs[1] = v7m_pop(env);
3249     env->regs[2] = v7m_pop(env);
3250     env->regs[3] = v7m_pop(env);
3251     env->regs[12] = v7m_pop(env);
3252     env->regs[14] = v7m_pop(env);
3253     env->regs[15] = v7m_pop(env);
3254     xpsr = v7m_pop(env);
3255     xpsr_write(env, xpsr, 0xfffffdff);
3256     /* Undo stack alignment.  */
3257     if (xpsr & 0x200)
3258         env->regs[13] |= 4;
3259     /* ??? The exception return type specifies Thread/Handler mode.  However
3260        this is also implied by the xPSR value. Not sure what to do
3261        if there is a mismatch.  */
3262     /* ??? Likewise for mismatches between the CONTROL register and the stack
3263        pointer.  */
3264 }
3265
3266 void arm_v7m_cpu_do_interrupt(CPUState *cs)
3267 {
3268     ARMCPU *cpu = ARM_CPU(cs);
3269     CPUARMState *env = &cpu->env;
3270     uint32_t xpsr = xpsr_read(env);
3271     uint32_t lr;
3272     uint32_t addr;
3273
3274     arm_log_exception(cs->exception_index);
3275
3276     lr = 0xfffffff1;
3277     if (env->v7m.current_sp)
3278         lr |= 4;
3279     if (env->v7m.exception == 0)
3280         lr |= 8;
3281
3282     /* For exceptions we just mark as pending on the NVIC, and let that
3283        handle it.  */
3284     /* TODO: Need to escalate if the current priority is higher than the
3285        one we're raising.  */
3286     switch (cs->exception_index) {
3287     case EXCP_UDEF:
3288         armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE);
3289         return;
3290     case EXCP_SWI:
3291         /* The PC already points to the next instruction.  */
3292         armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC);
3293         return;
3294     case EXCP_PREFETCH_ABORT:
3295     case EXCP_DATA_ABORT:
3296         /* TODO: if we implemented the MPU registers, this is where we
3297          * should set the MMFAR, etc from exception.fsr and exception.vaddress.
3298          */
3299         armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM);
3300         return;
3301     case EXCP_BKPT:
3302         if (semihosting_enabled) {
3303             int nr;
3304             nr = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff;
3305             if (nr == 0xab) {
3306                 env->regs[15] += 2;
3307                 env->regs[0] = do_arm_semihosting(env);
3308                 qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
3309                 return;
3310             }
3311         }
3312         armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG);
3313         return;
3314     case EXCP_IRQ:
3315         env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic);
3316         break;
3317     case EXCP_EXCEPTION_EXIT:
3318         do_v7m_exception_exit(env);
3319         return;
3320     default:
3321         cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
3322         return; /* Never happens.  Keep compiler happy.  */
3323     }
3324
3325     /* Align stack pointer.  */
3326     /* ??? Should only do this if Configuration Control Register
3327        STACKALIGN bit is set.  */
3328     if (env->regs[13] & 4) {
3329         env->regs[13] -= 4;
3330         xpsr |= 0x200;
3331     }
3332     /* Switch to the handler mode.  */
3333     v7m_push(env, xpsr);
3334     v7m_push(env, env->regs[15]);
3335     v7m_push(env, env->regs[14]);
3336     v7m_push(env, env->regs[12]);
3337     v7m_push(env, env->regs[3]);
3338     v7m_push(env, env->regs[2]);
3339     v7m_push(env, env->regs[1]);
3340     v7m_push(env, env->regs[0]);
3341     switch_v7m_sp(env, 0);
3342     /* Clear IT bits */
3343     env->condexec_bits = 0;
3344     env->regs[14] = lr;
3345     addr = ldl_phys(cs->as, env->v7m.vecbase + env->v7m.exception * 4);
3346     env->regs[15] = addr & 0xfffffffe;
3347     env->thumb = addr & 1;
3348 }
3349
3350 /* Handle a CPU exception.  */
3351 void arm_cpu_do_interrupt(CPUState *cs)
3352 {
3353     ARMCPU *cpu = ARM_CPU(cs);
3354     CPUARMState *env = &cpu->env;
3355     uint32_t addr;
3356     uint32_t mask;
3357     int new_mode;
3358     uint32_t offset;
3359
3360     assert(!IS_M(env));
3361
3362     arm_log_exception(cs->exception_index);
3363
3364     /* TODO: Vectored interrupt controller.  */
3365     switch (cs->exception_index) {
3366     case EXCP_UDEF:
3367         new_mode = ARM_CPU_MODE_UND;
3368         addr = 0x04;
3369         mask = CPSR_I;
3370         if (env->thumb)
3371             offset = 2;
3372         else
3373             offset = 4;
3374         break;
3375     case EXCP_SWI:
3376         if (semihosting_enabled) {
3377             /* Check for semihosting interrupt.  */
3378             if (env->thumb) {
3379                 mask = arm_lduw_code(env, env->regs[15] - 2, env->bswap_code)
3380                     & 0xff;
3381             } else {
3382                 mask = arm_ldl_code(env, env->regs[15] - 4, env->bswap_code)
3383                     & 0xffffff;
3384             }
3385             /* Only intercept calls from privileged modes, to provide some
3386                semblance of security.  */
3387             if (((mask == 0x123456 && !env->thumb)
3388                     || (mask == 0xab && env->thumb))
3389                   && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
3390                 env->regs[0] = do_arm_semihosting(env);
3391                 qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
3392                 return;
3393             }
3394         }
3395         new_mode = ARM_CPU_MODE_SVC;
3396         addr = 0x08;
3397         mask = CPSR_I;
3398         /* The PC already points to the next instruction.  */
3399         offset = 0;
3400         break;
3401     case EXCP_BKPT:
3402         /* See if this is a semihosting syscall.  */
3403         if (env->thumb && semihosting_enabled) {
3404             mask = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff;
3405             if (mask == 0xab
3406                   && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
3407                 env->regs[15] += 2;
3408                 env->regs[0] = do_arm_semihosting(env);
3409                 qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
3410                 return;
3411             }
3412         }
3413         env->exception.fsr = 2;
3414         /* Fall through to prefetch abort.  */
3415     case EXCP_PREFETCH_ABORT:
3416         env->cp15.ifsr_el2 = env->exception.fsr;
3417         env->cp15.far_el1 = deposit64(env->cp15.far_el1, 32, 32,
3418                                       env->exception.vaddress);
3419         qemu_log_mask(CPU_LOG_INT, "...with IFSR 0x%x IFAR 0x%x\n",
3420                       env->cp15.ifsr_el2, (uint32_t)env->exception.vaddress);
3421         new_mode = ARM_CPU_MODE_ABT;
3422         addr = 0x0c;
3423         mask = CPSR_A | CPSR_I;
3424         offset = 4;
3425         break;
3426     case EXCP_DATA_ABORT:
3427         env->cp15.esr_el[1] = env->exception.fsr;
3428         env->cp15.far_el1 = deposit64(env->cp15.far_el1, 0, 32,
3429                                       env->exception.vaddress);
3430         qemu_log_mask(CPU_LOG_INT, "...with DFSR 0x%x DFAR 0x%x\n",
3431                       (uint32_t)env->cp15.esr_el[1],
3432                       (uint32_t)env->exception.vaddress);
3433         new_mode = ARM_CPU_MODE_ABT;
3434         addr = 0x10;
3435         mask = CPSR_A | CPSR_I;
3436         offset = 8;
3437         break;
3438     case EXCP_IRQ:
3439         new_mode = ARM_CPU_MODE_IRQ;
3440         addr = 0x18;
3441         /* Disable IRQ and imprecise data aborts.  */
3442         mask = CPSR_A | CPSR_I;
3443         offset = 4;
3444         break;
3445     case EXCP_FIQ:
3446         new_mode = ARM_CPU_MODE_FIQ;
3447         addr = 0x1c;
3448         /* Disable FIQ, IRQ and imprecise data aborts.  */
3449         mask = CPSR_A | CPSR_I | CPSR_F;
3450         offset = 4;
3451         break;
3452     default:
3453         cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
3454         return; /* Never happens.  Keep compiler happy.  */
3455     }
3456     /* High vectors.  */
3457     if (env->cp15.c1_sys & SCTLR_V) {
3458         /* when enabled, base address cannot be remapped.  */
3459         addr += 0xffff0000;
3460     } else {
3461         /* ARM v7 architectures provide a vector base address register to remap
3462          * the interrupt vector table.
3463          * This register is only followed in non-monitor mode, and has a secure
3464          * and un-secure copy. Since the cpu is always in a un-secure operation
3465          * and is never in monitor mode this feature is always active.
3466          * Note: only bits 31:5 are valid.
3467          */
3468         addr += env->cp15.vbar_el[1];
3469     }
3470     switch_mode (env, new_mode);
3471     env->spsr = cpsr_read(env);
3472     /* Clear IT bits.  */
3473     env->condexec_bits = 0;
3474     /* Switch to the new mode, and to the correct instruction set.  */
3475     env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
3476     env->daif |= mask;
3477     /* this is a lie, as the was no c1_sys on V4T/V5, but who cares
3478      * and we should just guard the thumb mode on V4 */
3479     if (arm_feature(env, ARM_FEATURE_V4T)) {
3480         env->thumb = (env->cp15.c1_sys & SCTLR_TE) != 0;
3481     }
3482     env->regs[14] = env->regs[15] + offset;
3483     env->regs[15] = addr;
3484     cs->interrupt_request |= CPU_INTERRUPT_EXITTB;
3485 }
3486
3487 /* Check section/page access permissions.
3488    Returns the page protection flags, or zero if the access is not
3489    permitted.  */
3490 static inline int check_ap(CPUARMState *env, int ap, int domain_prot,
3491                            int access_type, int is_user)
3492 {
3493   int prot_ro;
3494
3495   if (domain_prot == 3) {
3496     return PAGE_READ | PAGE_WRITE;
3497   }
3498
3499   if (access_type == 1)
3500       prot_ro = 0;
3501   else
3502       prot_ro = PAGE_READ;
3503
3504   switch (ap) {
3505   case 0:
3506       if (arm_feature(env, ARM_FEATURE_V7)) {
3507           return 0;
3508       }
3509       if (access_type == 1)
3510           return 0;
3511       switch (env->cp15.c1_sys & (SCTLR_S | SCTLR_R)) {
3512       case SCTLR_S:
3513           return is_user ? 0 : PAGE_READ;
3514       case SCTLR_R:
3515           return PAGE_READ;
3516       default:
3517           return 0;
3518       }
3519   case 1:
3520       return is_user ? 0 : PAGE_READ | PAGE_WRITE;
3521   case 2:
3522       if (is_user)
3523           return prot_ro;
3524       else
3525           return PAGE_READ | PAGE_WRITE;
3526   case 3:
3527       return PAGE_READ | PAGE_WRITE;
3528   case 4: /* Reserved.  */
3529       return 0;
3530   case 5:
3531       return is_user ? 0 : prot_ro;
3532   case 6:
3533       return prot_ro;
3534   case 7:
3535       if (!arm_feature (env, ARM_FEATURE_V6K))
3536           return 0;
3537       return prot_ro;
3538   default:
3539       abort();
3540   }
3541 }
3542
3543 static uint32_t get_level1_table_address(CPUARMState *env, uint32_t address)
3544 {
3545     uint32_t table;
3546
3547     if (address & env->cp15.c2_mask)
3548         table = env->cp15.ttbr1_el1 & 0xffffc000;
3549     else
3550         table = env->cp15.ttbr0_el1 & env->cp15.c2_base_mask;
3551
3552     table |= (address >> 18) & 0x3ffc;
3553     return table;
3554 }
3555
3556 static int get_phys_addr_v5(CPUARMState *env, uint32_t address, int access_type,
3557                             int is_user, hwaddr *phys_ptr,
3558                             int *prot, target_ulong *page_size)
3559 {
3560     CPUState *cs = CPU(arm_env_get_cpu(env));
3561     int code;
3562     uint32_t table;
3563     uint32_t desc;
3564     int type;
3565     int ap;
3566     int domain;
3567     int domain_prot;
3568     hwaddr phys_addr;
3569
3570     /* Pagetable walk.  */
3571     /* Lookup l1 descriptor.  */
3572     table = get_level1_table_address(env, address);
3573     desc = ldl_phys(cs->as, table);
3574     type = (desc & 3);
3575     domain = (desc >> 5) & 0x0f;
3576     domain_prot = (env->cp15.c3 >> (domain * 2)) & 3;
3577     if (type == 0) {
3578         /* Section translation fault.  */
3579         code = 5;
3580         goto do_fault;
3581     }
3582     if (domain_prot == 0 || domain_prot == 2) {
3583         if (type == 2)
3584             code = 9; /* Section domain fault.  */
3585         else
3586             code = 11; /* Page domain fault.  */
3587         goto do_fault;
3588     }
3589     if (type == 2) {
3590         /* 1Mb section.  */
3591         phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
3592         ap = (desc >> 10) & 3;
3593         code = 13;
3594         *page_size = 1024 * 1024;
3595     } else {
3596         /* Lookup l2 entry.  */
3597         if (type == 1) {
3598             /* Coarse pagetable.  */
3599             table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
3600         } else {
3601             /* Fine pagetable.  */
3602             table = (desc & 0xfffff000) | ((address >> 8) & 0xffc);
3603         }
3604         desc = ldl_phys(cs->as, table);
3605         switch (desc & 3) {
3606         case 0: /* Page translation fault.  */
3607             code = 7;
3608             goto do_fault;
3609         case 1: /* 64k page.  */
3610             phys_addr = (desc & 0xffff0000) | (address & 0xffff);
3611             ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
3612             *page_size = 0x10000;
3613             break;
3614         case 2: /* 4k page.  */
3615             phys_addr = (desc & 0xfffff000) | (address & 0xfff);
3616             ap = (desc >> (4 + ((address >> 9) & 6))) & 3;
3617             *page_size = 0x1000;
3618             break;
3619         case 3: /* 1k page.  */
3620             if (type == 1) {
3621                 if (arm_feature(env, ARM_FEATURE_XSCALE)) {
3622                     phys_addr = (desc & 0xfffff000) | (address & 0xfff);
3623                 } else {
3624                     /* Page translation fault.  */
3625                     code = 7;
3626                     goto do_fault;
3627                 }
3628             } else {
3629                 phys_addr = (desc & 0xfffffc00) | (address & 0x3ff);
3630             }
3631             ap = (desc >> 4) & 3;
3632             *page_size = 0x400;
3633             break;
3634         default:
3635             /* Never happens, but compiler isn't smart enough to tell.  */
3636             abort();
3637         }
3638         code = 15;
3639     }
3640     *prot = check_ap(env, ap, domain_prot, access_type, is_user);
3641     if (!*prot) {
3642         /* Access permission fault.  */
3643         goto do_fault;
3644     }
3645     *prot |= PAGE_EXEC;
3646     *phys_ptr = phys_addr;
3647     return 0;
3648 do_fault:
3649     return code | (domain << 4);
3650 }
3651
3652 static int get_phys_addr_v6(CPUARMState *env, uint32_t address, int access_type,
3653                             int is_user, hwaddr *phys_ptr,
3654                             int *prot, target_ulong *page_size)
3655 {
3656     CPUState *cs = CPU(arm_env_get_cpu(env));
3657     int code;
3658     uint32_t table;
3659     uint32_t desc;
3660     uint32_t xn;
3661     uint32_t pxn = 0;
3662     int type;
3663     int ap;
3664     int domain = 0;
3665     int domain_prot;
3666     hwaddr phys_addr;
3667
3668     /* Pagetable walk.  */
3669     /* Lookup l1 descriptor.  */
3670     table = get_level1_table_address(env, address);
3671     desc = ldl_phys(cs->as, table);
3672     type = (desc & 3);
3673     if (type == 0 || (type == 3 && !arm_feature(env, ARM_FEATURE_PXN))) {
3674         /* Section translation fault, or attempt to use the encoding
3675          * which is Reserved on implementations without PXN.
3676          */
3677         code = 5;
3678         goto do_fault;
3679     }
3680     if ((type == 1) || !(desc & (1 << 18))) {
3681         /* Page or Section.  */
3682         domain = (desc >> 5) & 0x0f;
3683     }
3684     domain_prot = (env->cp15.c3 >> (domain * 2)) & 3;
3685     if (domain_prot == 0 || domain_prot == 2) {
3686         if (type != 1) {
3687             code = 9; /* Section domain fault.  */
3688         } else {
3689             code = 11; /* Page domain fault.  */
3690         }
3691         goto do_fault;
3692     }
3693     if (type != 1) {
3694         if (desc & (1 << 18)) {
3695             /* Supersection.  */
3696             phys_addr = (desc & 0xff000000) | (address & 0x00ffffff);
3697             *page_size = 0x1000000;
3698         } else {
3699             /* Section.  */
3700             phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
3701             *page_size = 0x100000;
3702         }
3703         ap = ((desc >> 10) & 3) | ((desc >> 13) & 4);
3704         xn = desc & (1 << 4);
3705         pxn = desc & 1;
3706         code = 13;
3707     } else {
3708         if (arm_feature(env, ARM_FEATURE_PXN)) {
3709             pxn = (desc >> 2) & 1;
3710         }
3711         /* Lookup l2 entry.  */
3712         table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
3713         desc = ldl_phys(cs->as, table);
3714         ap = ((desc >> 4) & 3) | ((desc >> 7) & 4);
3715         switch (desc & 3) {
3716         case 0: /* Page translation fault.  */
3717             code = 7;
3718             goto do_fault;
3719         case 1: /* 64k page.  */
3720             phys_addr = (desc & 0xffff0000) | (address & 0xffff);
3721             xn = desc & (1 << 15);
3722             *page_size = 0x10000;
3723             break;
3724         case 2: case 3: /* 4k page.  */
3725             phys_addr = (desc & 0xfffff000) | (address & 0xfff);
3726             xn = desc & 1;
3727             *page_size = 0x1000;
3728             break;
3729         default:
3730             /* Never happens, but compiler isn't smart enough to tell.  */
3731             abort();
3732         }
3733         code = 15;
3734     }
3735     if (domain_prot == 3) {
3736         *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
3737     } else {
3738         if (pxn && !is_user) {
3739             xn = 1;
3740         }
3741         if (xn && access_type == 2)
3742             goto do_fault;
3743
3744         /* The simplified model uses AP[0] as an access control bit.  */
3745         if ((env->cp15.c1_sys & SCTLR_AFE) && (ap & 1) == 0) {
3746             /* Access flag fault.  */
3747             code = (code == 15) ? 6 : 3;
3748             goto do_fault;
3749         }
3750         *prot = check_ap(env, ap, domain_prot, access_type, is_user);
3751         if (!*prot) {
3752             /* Access permission fault.  */
3753             goto do_fault;
3754         }
3755         if (!xn) {
3756             *prot |= PAGE_EXEC;
3757         }
3758     }
3759     *phys_ptr = phys_addr;
3760     return 0;
3761 do_fault:
3762     return code | (domain << 4);
3763 }
3764
3765 /* Fault type for long-descriptor MMU fault reporting; this corresponds
3766  * to bits [5..2] in the STATUS field in long-format DFSR/IFSR.
3767  */
3768 typedef enum {
3769     translation_fault = 1,
3770     access_fault = 2,
3771     permission_fault = 3,
3772 } MMUFaultType;
3773
3774 static int get_phys_addr_lpae(CPUARMState *env, target_ulong address,
3775                               int access_type, int is_user,
3776                               hwaddr *phys_ptr, int *prot,
3777                               target_ulong *page_size_ptr)
3778 {
3779     CPUState *cs = CPU(arm_env_get_cpu(env));
3780     /* Read an LPAE long-descriptor translation table. */
3781     MMUFaultType fault_type = translation_fault;
3782     uint32_t level = 1;
3783     uint32_t epd;
3784     int32_t tsz;
3785     uint32_t tg;
3786     uint64_t ttbr;
3787     int ttbr_select;
3788     hwaddr descaddr, descmask;
3789     uint32_t tableattrs;
3790     target_ulong page_size;
3791     uint32_t attrs;
3792     int32_t granule_sz = 9;
3793     int32_t va_size = 32;
3794     int32_t tbi = 0;
3795
3796     if (arm_el_is_aa64(env, 1)) {
3797         va_size = 64;
3798         if (extract64(address, 55, 1))
3799             tbi = extract64(env->cp15.c2_control, 38, 1);
3800         else
3801             tbi = extract64(env->cp15.c2_control, 37, 1);
3802         tbi *= 8;
3803     }
3804
3805     /* Determine whether this address is in the region controlled by
3806      * TTBR0 or TTBR1 (or if it is in neither region and should fault).
3807      * This is a Non-secure PL0/1 stage 1 translation, so controlled by
3808      * TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32:
3809      */
3810     uint32_t t0sz = extract32(env->cp15.c2_control, 0, 6);
3811     if (arm_el_is_aa64(env, 1)) {
3812         t0sz = MIN(t0sz, 39);
3813         t0sz = MAX(t0sz, 16);
3814     }
3815     uint32_t t1sz = extract32(env->cp15.c2_control, 16, 6);
3816     if (arm_el_is_aa64(env, 1)) {
3817         t1sz = MIN(t1sz, 39);
3818         t1sz = MAX(t1sz, 16);
3819     }
3820     if (t0sz && !extract64(address, va_size - t0sz, t0sz - tbi)) {
3821         /* there is a ttbr0 region and we are in it (high bits all zero) */
3822         ttbr_select = 0;
3823     } else if (t1sz && !extract64(~address, va_size - t1sz, t1sz - tbi)) {
3824         /* there is a ttbr1 region and we are in it (high bits all one) */
3825         ttbr_select = 1;
3826     } else if (!t0sz) {
3827         /* ttbr0 region is "everything not in the ttbr1 region" */
3828         ttbr_select = 0;
3829     } else if (!t1sz) {
3830         /* ttbr1 region is "everything not in the ttbr0 region" */
3831         ttbr_select = 1;
3832     } else {
3833         /* in the gap between the two regions, this is a Translation fault */
3834         fault_type = translation_fault;
3835         goto do_fault;
3836     }
3837
3838     /* Note that QEMU ignores shareability and cacheability attributes,
3839      * so we don't need to do anything with the SH, ORGN, IRGN fields
3840      * in the TTBCR.  Similarly, TTBCR:A1 selects whether we get the
3841      * ASID from TTBR0 or TTBR1, but QEMU's TLB doesn't currently
3842      * implement any ASID-like capability so we can ignore it (instead
3843      * we will always flush the TLB any time the ASID is changed).
3844      */
3845     if (ttbr_select == 0) {
3846         ttbr = env->cp15.ttbr0_el1;
3847         epd = extract32(env->cp15.c2_control, 7, 1);
3848         tsz = t0sz;
3849
3850         tg = extract32(env->cp15.c2_control, 14, 2);
3851         if (tg == 1) { /* 64KB pages */
3852             granule_sz = 13;
3853         }
3854         if (tg == 2) { /* 16KB pages */
3855             granule_sz = 11;
3856         }
3857     } else {
3858         ttbr = env->cp15.ttbr1_el1;
3859         epd = extract32(env->cp15.c2_control, 23, 1);
3860         tsz = t1sz;
3861
3862         tg = extract32(env->cp15.c2_control, 30, 2);
3863         if (tg == 3)  { /* 64KB pages */
3864             granule_sz = 13;
3865         }
3866         if (tg == 1) { /* 16KB pages */
3867             granule_sz = 11;
3868         }
3869     }
3870
3871     if (epd) {
3872         /* Translation table walk disabled => Translation fault on TLB miss */
3873         goto do_fault;
3874     }
3875
3876     /* The starting level depends on the virtual address size which can be
3877      * up to 48-bits and the translation granule size.
3878      */
3879     if ((va_size - tsz) > (granule_sz * 4 + 3)) {
3880         level = 0;
3881     } else if ((va_size - tsz) > (granule_sz * 3 + 3)) {
3882         level = 1;
3883     } else {
3884         level = 2;
3885     }
3886
3887     /* Clear the vaddr bits which aren't part of the within-region address,
3888      * so that we don't have to special case things when calculating the
3889      * first descriptor address.
3890      */
3891     if (tsz) {
3892         address &= (1ULL << (va_size - tsz)) - 1;
3893     }
3894
3895     descmask = (1ULL << (granule_sz + 3)) - 1;
3896
3897     /* Now we can extract the actual base address from the TTBR */
3898     descaddr = extract64(ttbr, 0, 48);
3899     descaddr &= ~((1ULL << (va_size - tsz - (granule_sz * (4 - level)))) - 1);
3900
3901     tableattrs = 0;
3902     for (;;) {
3903         uint64_t descriptor;
3904
3905         descaddr |= (address >> (granule_sz * (4 - level))) & descmask;
3906         descaddr &= ~7ULL;
3907         descriptor = ldq_phys(cs->as, descaddr);
3908         if (!(descriptor & 1) ||
3909             (!(descriptor & 2) && (level == 3))) {
3910             /* Invalid, or the Reserved level 3 encoding */
3911             goto do_fault;
3912         }
3913         descaddr = descriptor & 0xfffffff000ULL;
3914
3915         if ((descriptor & 2) && (level < 3)) {
3916             /* Table entry. The top five bits are attributes which  may
3917              * propagate down through lower levels of the table (and
3918              * which are all arranged so that 0 means "no effect", so
3919              * we can gather them up by ORing in the bits at each level).
3920              */
3921             tableattrs |= extract64(descriptor, 59, 5);
3922             level++;
3923             continue;
3924         }
3925         /* Block entry at level 1 or 2, or page entry at level 3.
3926          * These are basically the same thing, although the number
3927          * of bits we pull in from the vaddr varies.
3928          */
3929         page_size = (1 << ((granule_sz * (4 - level)) + 3));
3930         descaddr |= (address & (page_size - 1));
3931         /* Extract attributes from the descriptor and merge with table attrs */
3932         attrs = extract64(descriptor, 2, 10)
3933             | (extract64(descriptor, 52, 12) << 10);
3934         attrs |= extract32(tableattrs, 0, 2) << 11; /* XN, PXN */
3935         attrs |= extract32(tableattrs, 3, 1) << 5; /* APTable[1] => AP[2] */
3936         /* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1
3937          * means "force PL1 access only", which means forcing AP[1] to 0.
3938          */
3939         if (extract32(tableattrs, 2, 1)) {
3940             attrs &= ~(1 << 4);
3941         }
3942         /* Since we're always in the Non-secure state, NSTable is ignored. */
3943         break;
3944     }
3945     /* Here descaddr is the final physical address, and attributes
3946      * are all in attrs.
3947      */
3948     fault_type = access_fault;
3949     if ((attrs & (1 << 8)) == 0) {
3950         /* Access flag */
3951         goto do_fault;
3952     }
3953     fault_type = permission_fault;
3954     if (is_user && !(attrs & (1 << 4))) {
3955         /* Unprivileged access not enabled */
3956         goto do_fault;
3957     }
3958     *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
3959     if ((arm_feature(env, ARM_FEATURE_V8) && is_user && (attrs & (1 << 12))) ||
3960         (!arm_feature(env, ARM_FEATURE_V8) && (attrs & (1 << 12))) ||
3961         (!is_user && (attrs & (1 << 11)))) {
3962         /* XN/UXN or PXN. Since we only implement EL0/EL1 we unconditionally
3963          * treat XN/UXN as UXN for v8.
3964          */
3965         if (access_type == 2) {
3966             goto do_fault;
3967         }
3968         *prot &= ~PAGE_EXEC;
3969     }
3970     if (attrs & (1 << 5)) {
3971         /* Write access forbidden */
3972         if (access_type == 1) {
3973             goto do_fault;
3974         }
3975         *prot &= ~PAGE_WRITE;
3976     }
3977
3978     *phys_ptr = descaddr;
3979     *page_size_ptr = page_size;
3980     return 0;
3981
3982 do_fault:
3983     /* Long-descriptor format IFSR/DFSR value */
3984     return (1 << 9) | (fault_type << 2) | level;
3985 }
3986
3987 static int get_phys_addr_mpu(CPUARMState *env, uint32_t address,
3988                              int access_type, int is_user,
3989                              hwaddr *phys_ptr, int *prot)
3990 {
3991     int n;
3992     uint32_t mask;
3993     uint32_t base;
3994
3995     *phys_ptr = address;
3996     for (n = 7; n >= 0; n--) {
3997         base = env->cp15.c6_region[n];
3998         if ((base & 1) == 0)
3999             continue;
4000         mask = 1 << ((base >> 1) & 0x1f);
4001         /* Keep this shift separate from the above to avoid an
4002            (undefined) << 32.  */
4003         mask = (mask << 1) - 1;
4004         if (((base ^ address) & ~mask) == 0)
4005             break;
4006     }
4007     if (n < 0)
4008         return 2;
4009
4010     if (access_type == 2) {
4011         mask = env->cp15.pmsav5_insn_ap;
4012     } else {
4013         mask = env->cp15.pmsav5_data_ap;
4014     }
4015     mask = (mask >> (n * 4)) & 0xf;
4016     switch (mask) {
4017     case 0:
4018         return 1;
4019     case 1:
4020         if (is_user)
4021           return 1;
4022         *prot = PAGE_READ | PAGE_WRITE;
4023         break;
4024     case 2:
4025         *prot = PAGE_READ;
4026         if (!is_user)
4027             *prot |= PAGE_WRITE;
4028         break;
4029     case 3:
4030         *prot = PAGE_READ | PAGE_WRITE;
4031         break;
4032     case 5:
4033         if (is_user)
4034             return 1;
4035         *prot = PAGE_READ;
4036         break;
4037     case 6:
4038         *prot = PAGE_READ;
4039         break;
4040     default:
4041         /* Bad permission.  */
4042         return 1;
4043     }
4044     *prot |= PAGE_EXEC;
4045     return 0;
4046 }
4047
4048 /* get_phys_addr - get the physical address for this virtual address
4049  *
4050  * Find the physical address corresponding to the given virtual address,
4051  * by doing a translation table walk on MMU based systems or using the
4052  * MPU state on MPU based systems.
4053  *
4054  * Returns 0 if the translation was successful. Otherwise, phys_ptr,
4055  * prot and page_size are not filled in, and the return value provides
4056  * information on why the translation aborted, in the format of a
4057  * DFSR/IFSR fault register, with the following caveats:
4058  *  * we honour the short vs long DFSR format differences.
4059  *  * the WnR bit is never set (the caller must do this).
4060  *  * for MPU based systems we don't bother to return a full FSR format
4061  *    value.
4062  *
4063  * @env: CPUARMState
4064  * @address: virtual address to get physical address for
4065  * @access_type: 0 for read, 1 for write, 2 for execute
4066  * @is_user: 0 for privileged access, 1 for user
4067  * @phys_ptr: set to the physical address corresponding to the virtual address
4068  * @prot: set to the permissions for the page containing phys_ptr
4069  * @page_size: set to the size of the page containing phys_ptr
4070  */
4071 static inline int get_phys_addr(CPUARMState *env, target_ulong address,
4072                                 int access_type, int is_user,
4073                                 hwaddr *phys_ptr, int *prot,
4074                                 target_ulong *page_size)
4075 {
4076     /* Fast Context Switch Extension.  */
4077     if (address < 0x02000000)
4078         address += env->cp15.c13_fcse;
4079
4080     if ((env->cp15.c1_sys & SCTLR_M) == 0) {
4081         /* MMU/MPU disabled.  */
4082         *phys_ptr = address;
4083         *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
4084         *page_size = TARGET_PAGE_SIZE;
4085         return 0;
4086     } else if (arm_feature(env, ARM_FEATURE_MPU)) {
4087         *page_size = TARGET_PAGE_SIZE;
4088         return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
4089                                  prot);
4090     } else if (extended_addresses_enabled(env)) {
4091         return get_phys_addr_lpae(env, address, access_type, is_user, phys_ptr,
4092                                   prot, page_size);
4093     } else if (env->cp15.c1_sys & SCTLR_XP) {
4094         return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
4095                                 prot, page_size);
4096     } else {
4097         return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
4098                                 prot, page_size);
4099     }
4100 }
4101
4102 int arm_cpu_handle_mmu_fault(CPUState *cs, vaddr address,
4103                              int access_type, int mmu_idx)
4104 {
4105     ARMCPU *cpu = ARM_CPU(cs);
4106     CPUARMState *env = &cpu->env;
4107     hwaddr phys_addr;
4108     target_ulong page_size;
4109     int prot;
4110     int ret, is_user;
4111     uint32_t syn;
4112     bool same_el = (arm_current_pl(env) != 0);
4113
4114     is_user = mmu_idx == MMU_USER_IDX;
4115     ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot,
4116                         &page_size);
4117     if (ret == 0) {
4118         /* Map a single [sub]page.  */
4119         phys_addr &= ~(hwaddr)0x3ff;
4120         address &= ~(target_ulong)0x3ff;
4121         tlb_set_page(cs, address, phys_addr, prot, mmu_idx, page_size);
4122         return 0;
4123     }
4124
4125     /* AArch64 syndrome does not have an LPAE bit */
4126     syn = ret & ~(1 << 9);
4127
4128     /* For insn and data aborts we assume there is no instruction syndrome
4129      * information; this is always true for exceptions reported to EL1.
4130      */
4131     if (access_type == 2) {
4132         syn = syn_insn_abort(same_el, 0, 0, syn);
4133         cs->exception_index = EXCP_PREFETCH_ABORT;
4134     } else {
4135         syn = syn_data_abort(same_el, 0, 0, 0, access_type == 1, syn);
4136         if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6)) {
4137             ret |= (1 << 11);
4138         }
4139         cs->exception_index = EXCP_DATA_ABORT;
4140     }
4141
4142     env->exception.syndrome = syn;
4143     env->exception.vaddress = address;
4144     env->exception.fsr = ret;
4145     return 1;
4146 }
4147
4148 hwaddr arm_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
4149 {
4150     ARMCPU *cpu = ARM_CPU(cs);
4151     hwaddr phys_addr;
4152     target_ulong page_size;
4153     int prot;
4154     int ret;
4155
4156     ret = get_phys_addr(&cpu->env, addr, 0, 0, &phys_addr, &prot, &page_size);
4157
4158     if (ret != 0) {
4159         return -1;
4160     }
4161
4162     return phys_addr;
4163 }
4164
4165 void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
4166 {
4167     if ((env->uncached_cpsr & CPSR_M) == mode) {
4168         env->regs[13] = val;
4169     } else {
4170         env->banked_r13[bank_number(mode)] = val;
4171     }
4172 }
4173
4174 uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
4175 {
4176     if ((env->uncached_cpsr & CPSR_M) == mode) {
4177         return env->regs[13];
4178     } else {
4179         return env->banked_r13[bank_number(mode)];
4180     }
4181 }
4182
4183 uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg)
4184 {
4185     ARMCPU *cpu = arm_env_get_cpu(env);
4186
4187     switch (reg) {
4188     case 0: /* APSR */
4189         return xpsr_read(env) & 0xf8000000;
4190     case 1: /* IAPSR */
4191         return xpsr_read(env) & 0xf80001ff;
4192     case 2: /* EAPSR */
4193         return xpsr_read(env) & 0xff00fc00;
4194     case 3: /* xPSR */
4195         return xpsr_read(env) & 0xff00fdff;
4196     case 5: /* IPSR */
4197         return xpsr_read(env) & 0x000001ff;
4198     case 6: /* EPSR */
4199         return xpsr_read(env) & 0x0700fc00;
4200     case 7: /* IEPSR */
4201         return xpsr_read(env) & 0x0700edff;
4202     case 8: /* MSP */
4203         return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13];
4204     case 9: /* PSP */
4205         return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp;
4206     case 16: /* PRIMASK */
4207         return (env->daif & PSTATE_I) != 0;
4208     case 17: /* BASEPRI */
4209     case 18: /* BASEPRI_MAX */
4210         return env->v7m.basepri;
4211     case 19: /* FAULTMASK */
4212         return (env->daif & PSTATE_F) != 0;
4213     case 20: /* CONTROL */
4214         return env->v7m.control;
4215     default:
4216         /* ??? For debugging only.  */
4217         cpu_abort(CPU(cpu), "Unimplemented system register read (%d)\n", reg);
4218         return 0;
4219     }
4220 }
4221
4222 void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
4223 {
4224     ARMCPU *cpu = arm_env_get_cpu(env);
4225
4226     switch (reg) {
4227     case 0: /* APSR */
4228         xpsr_write(env, val, 0xf8000000);
4229         break;
4230     case 1: /* IAPSR */
4231         xpsr_write(env, val, 0xf8000000);
4232         break;
4233     case 2: /* EAPSR */
4234         xpsr_write(env, val, 0xfe00fc00);
4235         break;
4236     case 3: /* xPSR */
4237         xpsr_write(env, val, 0xfe00fc00);
4238         break;
4239     case 5: /* IPSR */
4240         /* IPSR bits are readonly.  */
4241         break;
4242     case 6: /* EPSR */
4243         xpsr_write(env, val, 0x0600fc00);
4244         break;
4245     case 7: /* IEPSR */
4246         xpsr_write(env, val, 0x0600fc00);
4247         break;
4248     case 8: /* MSP */
4249         if (env->v7m.current_sp)
4250             env->v7m.other_sp = val;
4251         else
4252             env->regs[13] = val;
4253         break;
4254     case 9: /* PSP */
4255         if (env->v7m.current_sp)
4256             env->regs[13] = val;
4257         else
4258             env->v7m.other_sp = val;
4259         break;
4260     case 16: /* PRIMASK */
4261         if (val & 1) {
4262             env->daif |= PSTATE_I;
4263         } else {
4264             env->daif &= ~PSTATE_I;
4265         }
4266         break;
4267     case 17: /* BASEPRI */
4268         env->v7m.basepri = val & 0xff;
4269         break;
4270     case 18: /* BASEPRI_MAX */
4271         val &= 0xff;
4272         if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0))
4273             env->v7m.basepri = val;
4274         break;
4275     case 19: /* FAULTMASK */
4276         if (val & 1) {
4277             env->daif |= PSTATE_F;
4278         } else {
4279             env->daif &= ~PSTATE_F;
4280         }
4281         break;
4282     case 20: /* CONTROL */
4283         env->v7m.control = val & 3;
4284         switch_v7m_sp(env, (val & 2) != 0);
4285         break;
4286     default:
4287         /* ??? For debugging only.  */
4288         cpu_abort(CPU(cpu), "Unimplemented system register write (%d)\n", reg);
4289         return;
4290     }
4291 }
4292
4293 #endif
4294
4295 void HELPER(dc_zva)(CPUARMState *env, uint64_t vaddr_in)
4296 {
4297     /* Implement DC ZVA, which zeroes a fixed-length block of memory.
4298      * Note that we do not implement the (architecturally mandated)
4299      * alignment fault for attempts to use this on Device memory
4300      * (which matches the usual QEMU behaviour of not implementing either
4301      * alignment faults or any memory attribute handling).
4302      */
4303
4304     ARMCPU *cpu = arm_env_get_cpu(env);
4305     uint64_t blocklen = 4 << cpu->dcz_blocksize;
4306     uint64_t vaddr = vaddr_in & ~(blocklen - 1);
4307
4308 #ifndef CONFIG_USER_ONLY
4309     {
4310         /* Slightly awkwardly, QEMU's TARGET_PAGE_SIZE may be less than
4311          * the block size so we might have to do more than one TLB lookup.
4312          * We know that in fact for any v8 CPU the page size is at least 4K
4313          * and the block size must be 2K or less, but TARGET_PAGE_SIZE is only
4314          * 1K as an artefact of legacy v5 subpage support being present in the
4315          * same QEMU executable.
4316          */
4317         int maxidx = DIV_ROUND_UP(blocklen, TARGET_PAGE_SIZE);
4318         void *hostaddr[maxidx];
4319         int try, i;
4320
4321         for (try = 0; try < 2; try++) {
4322
4323             for (i = 0; i < maxidx; i++) {
4324                 hostaddr[i] = tlb_vaddr_to_host(env,
4325                                                 vaddr + TARGET_PAGE_SIZE * i,
4326                                                 1, cpu_mmu_index(env));
4327                 if (!hostaddr[i]) {
4328                     break;
4329                 }
4330             }
4331             if (i == maxidx) {
4332                 /* If it's all in the TLB it's fair game for just writing to;
4333                  * we know we don't need to update dirty status, etc.
4334                  */
4335                 for (i = 0; i < maxidx - 1; i++) {
4336                     memset(hostaddr[i], 0, TARGET_PAGE_SIZE);
4337                 }
4338                 memset(hostaddr[i], 0, blocklen - (i * TARGET_PAGE_SIZE));
4339                 return;
4340             }
4341             /* OK, try a store and see if we can populate the tlb. This
4342              * might cause an exception if the memory isn't writable,
4343              * in which case we will longjmp out of here. We must for
4344              * this purpose use the actual register value passed to us
4345              * so that we get the fault address right.
4346              */
4347             helper_ret_stb_mmu(env, vaddr_in, 0, cpu_mmu_index(env), GETRA());
4348             /* Now we can populate the other TLB entries, if any */
4349             for (i = 0; i < maxidx; i++) {
4350                 uint64_t va = vaddr + TARGET_PAGE_SIZE * i;
4351                 if (va != (vaddr_in & TARGET_PAGE_MASK)) {
4352                     helper_ret_stb_mmu(env, va, 0, cpu_mmu_index(env), GETRA());
4353                 }
4354             }
4355         }
4356
4357         /* Slow path (probably attempt to do this to an I/O device or
4358          * similar, or clearing of a block of code we have translations
4359          * cached for). Just do a series of byte writes as the architecture
4360          * demands. It's not worth trying to use a cpu_physical_memory_map(),
4361          * memset(), unmap() sequence here because:
4362          *  + we'd need to account for the blocksize being larger than a page
4363          *  + the direct-RAM access case is almost always going to be dealt
4364          *    with in the fastpath code above, so there's no speed benefit
4365          *  + we would have to deal with the map returning NULL because the
4366          *    bounce buffer was in use
4367          */
4368         for (i = 0; i < blocklen; i++) {
4369             helper_ret_stb_mmu(env, vaddr + i, 0, cpu_mmu_index(env), GETRA());
4370         }
4371     }
4372 #else
4373     memset(g2h(vaddr), 0, blocklen);
4374 #endif
4375 }
4376
4377 /* Note that signed overflow is undefined in C.  The following routines are
4378    careful to use unsigned types where modulo arithmetic is required.
4379    Failure to do so _will_ break on newer gcc.  */
4380
4381 /* Signed saturating arithmetic.  */
4382
4383 /* Perform 16-bit signed saturating addition.  */
4384 static inline uint16_t add16_sat(uint16_t a, uint16_t b)
4385 {
4386     uint16_t res;
4387
4388     res = a + b;
4389     if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) {
4390         if (a & 0x8000)
4391             res = 0x8000;
4392         else
4393             res = 0x7fff;
4394     }
4395     return res;
4396 }
4397
4398 /* Perform 8-bit signed saturating addition.  */
4399 static inline uint8_t add8_sat(uint8_t a, uint8_t b)
4400 {
4401     uint8_t res;
4402
4403     res = a + b;
4404     if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) {
4405         if (a & 0x80)
4406             res = 0x80;
4407         else
4408             res = 0x7f;
4409     }
4410     return res;
4411 }
4412
4413 /* Perform 16-bit signed saturating subtraction.  */
4414 static inline uint16_t sub16_sat(uint16_t a, uint16_t b)
4415 {
4416     uint16_t res;
4417
4418     res = a - b;
4419     if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) {
4420         if (a & 0x8000)
4421             res = 0x8000;
4422         else
4423             res = 0x7fff;
4424     }
4425     return res;
4426 }
4427
4428 /* Perform 8-bit signed saturating subtraction.  */
4429 static inline uint8_t sub8_sat(uint8_t a, uint8_t b)
4430 {
4431     uint8_t res;
4432
4433     res = a - b;
4434     if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) {
4435         if (a & 0x80)
4436             res = 0x80;
4437         else
4438             res = 0x7f;
4439     }
4440     return res;
4441 }
4442
4443 #define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16);
4444 #define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16);
4445 #define ADD8(a, b, n)  RESULT(add8_sat(a, b), n, 8);
4446 #define SUB8(a, b, n)  RESULT(sub8_sat(a, b), n, 8);
4447 #define PFX q
4448
4449 #include "op_addsub.h"
4450
4451 /* Unsigned saturating arithmetic.  */
4452 static inline uint16_t add16_usat(uint16_t a, uint16_t b)
4453 {
4454     uint16_t res;
4455     res = a + b;
4456     if (res < a)
4457         res = 0xffff;
4458     return res;
4459 }
4460
4461 static inline uint16_t sub16_usat(uint16_t a, uint16_t b)
4462 {
4463     if (a > b)
4464         return a - b;
4465     else
4466         return 0;
4467 }
4468
4469 static inline uint8_t add8_usat(uint8_t a, uint8_t b)
4470 {
4471     uint8_t res;
4472     res = a + b;
4473     if (res < a)
4474         res = 0xff;
4475     return res;
4476 }
4477
4478 static inline uint8_t sub8_usat(uint8_t a, uint8_t b)
4479 {
4480     if (a > b)
4481         return a - b;
4482     else
4483         return 0;
4484 }
4485
4486 #define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16);
4487 #define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16);
4488 #define ADD8(a, b, n)  RESULT(add8_usat(a, b), n, 8);
4489 #define SUB8(a, b, n)  RESULT(sub8_usat(a, b), n, 8);
4490 #define PFX uq
4491
4492 #include "op_addsub.h"
4493
4494 /* Signed modulo arithmetic.  */
4495 #define SARITH16(a, b, n, op) do { \
4496     int32_t sum; \
4497     sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \
4498     RESULT(sum, n, 16); \
4499     if (sum >= 0) \
4500         ge |= 3 << (n * 2); \
4501     } while(0)
4502
4503 #define SARITH8(a, b, n, op) do { \
4504     int32_t sum; \
4505     sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \
4506     RESULT(sum, n, 8); \
4507     if (sum >= 0) \
4508         ge |= 1 << n; \
4509     } while(0)
4510
4511
4512 #define ADD16(a, b, n) SARITH16(a, b, n, +)
4513 #define SUB16(a, b, n) SARITH16(a, b, n, -)
4514 #define ADD8(a, b, n)  SARITH8(a, b, n, +)
4515 #define SUB8(a, b, n)  SARITH8(a, b, n, -)
4516 #define PFX s
4517 #define ARITH_GE
4518
4519 #include "op_addsub.h"
4520
4521 /* Unsigned modulo arithmetic.  */
4522 #define ADD16(a, b, n) do { \
4523     uint32_t sum; \
4524     sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \
4525     RESULT(sum, n, 16); \
4526     if ((sum >> 16) == 1) \
4527         ge |= 3 << (n * 2); \
4528     } while(0)
4529
4530 #define ADD8(a, b, n) do { \
4531     uint32_t sum; \
4532     sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \
4533     RESULT(sum, n, 8); \
4534     if ((sum >> 8) == 1) \
4535         ge |= 1 << n; \
4536     } while(0)
4537
4538 #define SUB16(a, b, n) do { \
4539     uint32_t sum; \
4540     sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \
4541     RESULT(sum, n, 16); \
4542     if ((sum >> 16) == 0) \
4543         ge |= 3 << (n * 2); \
4544     } while(0)
4545
4546 #define SUB8(a, b, n) do { \
4547     uint32_t sum; \
4548     sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \
4549     RESULT(sum, n, 8); \
4550     if ((sum >> 8) == 0) \
4551         ge |= 1 << n; \
4552     } while(0)
4553
4554 #define PFX u
4555 #define ARITH_GE
4556
4557 #include "op_addsub.h"
4558
4559 /* Halved signed arithmetic.  */
4560 #define ADD16(a, b, n) \
4561   RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16)
4562 #define SUB16(a, b, n) \
4563   RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16)
4564 #define ADD8(a, b, n) \
4565   RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8)
4566 #define SUB8(a, b, n) \
4567   RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8)
4568 #define PFX sh
4569
4570 #include "op_addsub.h"
4571
4572 /* Halved unsigned arithmetic.  */
4573 #define ADD16(a, b, n) \
4574   RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16)
4575 #define SUB16(a, b, n) \
4576   RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16)
4577 #define ADD8(a, b, n) \
4578   RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8)
4579 #define SUB8(a, b, n) \
4580   RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8)
4581 #define PFX uh
4582
4583 #include "op_addsub.h"
4584
4585 static inline uint8_t do_usad(uint8_t a, uint8_t b)
4586 {
4587     if (a > b)
4588         return a - b;
4589     else
4590         return b - a;
4591 }
4592
4593 /* Unsigned sum of absolute byte differences.  */
4594 uint32_t HELPER(usad8)(uint32_t a, uint32_t b)
4595 {
4596     uint32_t sum;
4597     sum = do_usad(a, b);
4598     sum += do_usad(a >> 8, b >> 8);
4599     sum += do_usad(a >> 16, b >>16);
4600     sum += do_usad(a >> 24, b >> 24);
4601     return sum;
4602 }
4603
4604 /* For ARMv6 SEL instruction.  */
4605 uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b)
4606 {
4607     uint32_t mask;
4608
4609     mask = 0;
4610     if (flags & 1)
4611         mask |= 0xff;
4612     if (flags & 2)
4613         mask |= 0xff00;
4614     if (flags & 4)
4615         mask |= 0xff0000;
4616     if (flags & 8)
4617         mask |= 0xff000000;
4618     return (a & mask) | (b & ~mask);
4619 }
4620
4621 /* VFP support.  We follow the convention used for VFP instructions:
4622    Single precision routines have a "s" suffix, double precision a
4623    "d" suffix.  */
4624
4625 /* Convert host exception flags to vfp form.  */
4626 static inline int vfp_exceptbits_from_host(int host_bits)
4627 {
4628     int target_bits = 0;
4629
4630     if (host_bits & float_flag_invalid)
4631         target_bits |= 1;
4632     if (host_bits & float_flag_divbyzero)
4633         target_bits |= 2;
4634     if (host_bits & float_flag_overflow)
4635         target_bits |= 4;
4636     if (host_bits & (float_flag_underflow | float_flag_output_denormal))
4637         target_bits |= 8;
4638     if (host_bits & float_flag_inexact)
4639         target_bits |= 0x10;
4640     if (host_bits & float_flag_input_denormal)
4641         target_bits |= 0x80;
4642     return target_bits;
4643 }
4644
4645 uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env)
4646 {
4647     int i;
4648     uint32_t fpscr;
4649
4650     fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
4651             | (env->vfp.vec_len << 16)
4652             | (env->vfp.vec_stride << 20);
4653     i = get_float_exception_flags(&env->vfp.fp_status);
4654     i |= get_float_exception_flags(&env->vfp.standard_fp_status);
4655     fpscr |= vfp_exceptbits_from_host(i);
4656     return fpscr;
4657 }
4658
4659 uint32_t vfp_get_fpscr(CPUARMState *env)
4660 {
4661     return HELPER(vfp_get_fpscr)(env);
4662 }
4663
4664 /* Convert vfp exception flags to target form.  */
4665 static inline int vfp_exceptbits_to_host(int target_bits)
4666 {
4667     int host_bits = 0;
4668
4669     if (target_bits & 1)
4670         host_bits |= float_flag_invalid;
4671     if (target_bits & 2)
4672         host_bits |= float_flag_divbyzero;
4673     if (target_bits & 4)
4674         host_bits |= float_flag_overflow;
4675     if (target_bits & 8)
4676         host_bits |= float_flag_underflow;
4677     if (target_bits & 0x10)
4678         host_bits |= float_flag_inexact;
4679     if (target_bits & 0x80)
4680         host_bits |= float_flag_input_denormal;
4681     return host_bits;
4682 }
4683
4684 void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
4685 {
4686     int i;
4687     uint32_t changed;
4688
4689     changed = env->vfp.xregs[ARM_VFP_FPSCR];
4690     env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
4691     env->vfp.vec_len = (val >> 16) & 7;
4692     env->vfp.vec_stride = (val >> 20) & 3;
4693
4694     changed ^= val;
4695     if (changed & (3 << 22)) {
4696         i = (val >> 22) & 3;
4697         switch (i) {
4698         case FPROUNDING_TIEEVEN:
4699             i = float_round_nearest_even;
4700             break;
4701         case FPROUNDING_POSINF:
4702             i = float_round_up;
4703             break;
4704         case FPROUNDING_NEGINF:
4705             i = float_round_down;
4706             break;
4707         case FPROUNDING_ZERO:
4708             i = float_round_to_zero;
4709             break;
4710         }
4711         set_float_rounding_mode(i, &env->vfp.fp_status);
4712     }
4713     if (changed & (1 << 24)) {
4714         set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
4715         set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
4716     }
4717     if (changed & (1 << 25))
4718         set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status);
4719
4720     i = vfp_exceptbits_to_host(val);
4721     set_float_exception_flags(i, &env->vfp.fp_status);
4722     set_float_exception_flags(0, &env->vfp.standard_fp_status);
4723 }
4724
4725 void vfp_set_fpscr(CPUARMState *env, uint32_t val)
4726 {
4727     HELPER(vfp_set_fpscr)(env, val);
4728 }
4729
4730 #define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
4731
4732 #define VFP_BINOP(name) \
4733 float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \
4734 { \
4735     float_status *fpst = fpstp; \
4736     return float32_ ## name(a, b, fpst); \
4737 } \
4738 float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \
4739 { \
4740     float_status *fpst = fpstp; \
4741     return float64_ ## name(a, b, fpst); \
4742 }
4743 VFP_BINOP(add)
4744 VFP_BINOP(sub)
4745 VFP_BINOP(mul)
4746 VFP_BINOP(div)
4747 VFP_BINOP(min)
4748 VFP_BINOP(max)
4749 VFP_BINOP(minnum)
4750 VFP_BINOP(maxnum)
4751 #undef VFP_BINOP
4752
4753 float32 VFP_HELPER(neg, s)(float32 a)
4754 {
4755     return float32_chs(a);
4756 }
4757
4758 float64 VFP_HELPER(neg, d)(float64 a)
4759 {
4760     return float64_chs(a);
4761 }
4762
4763 float32 VFP_HELPER(abs, s)(float32 a)
4764 {
4765     return float32_abs(a);
4766 }
4767
4768 float64 VFP_HELPER(abs, d)(float64 a)
4769 {
4770     return float64_abs(a);
4771 }
4772
4773 float32 VFP_HELPER(sqrt, s)(float32 a, CPUARMState *env)
4774 {
4775     return float32_sqrt(a, &env->vfp.fp_status);
4776 }
4777
4778 float64 VFP_HELPER(sqrt, d)(float64 a, CPUARMState *env)
4779 {
4780     return float64_sqrt(a, &env->vfp.fp_status);
4781 }
4782
4783 /* XXX: check quiet/signaling case */
4784 #define DO_VFP_cmp(p, type) \
4785 void VFP_HELPER(cmp, p)(type a, type b, CPUARMState *env)  \
4786 { \
4787     uint32_t flags; \
4788     switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \
4789     case 0: flags = 0x6; break; \
4790     case -1: flags = 0x8; break; \
4791     case 1: flags = 0x2; break; \
4792     default: case 2: flags = 0x3; break; \
4793     } \
4794     env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
4795         | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
4796 } \
4797 void VFP_HELPER(cmpe, p)(type a, type b, CPUARMState *env) \
4798 { \
4799     uint32_t flags; \
4800     switch(type ## _compare(a, b, &env->vfp.fp_status)) { \
4801     case 0: flags = 0x6; break; \
4802     case -1: flags = 0x8; break; \
4803     case 1: flags = 0x2; break; \
4804     default: case 2: flags = 0x3; break; \
4805     } \
4806     env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
4807         | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
4808 }
4809 DO_VFP_cmp(s, float32)
4810 DO_VFP_cmp(d, float64)
4811 #undef DO_VFP_cmp
4812
4813 /* Integer to float and float to integer conversions */
4814
4815 #define CONV_ITOF(name, fsz, sign) \
4816     float##fsz HELPER(name)(uint32_t x, void *fpstp) \
4817 { \
4818     float_status *fpst = fpstp; \
4819     return sign##int32_to_##float##fsz((sign##int32_t)x, fpst); \
4820 }
4821
4822 #define CONV_FTOI(name, fsz, sign, round) \
4823 uint32_t HELPER(name)(float##fsz x, void *fpstp) \
4824 { \
4825     float_status *fpst = fpstp; \
4826     if (float##fsz##_is_any_nan(x)) { \
4827         float_raise(float_flag_invalid, fpst); \
4828         return 0; \
4829     } \
4830     return float##fsz##_to_##sign##int32##round(x, fpst); \
4831 }
4832
4833 #define FLOAT_CONVS(name, p, fsz, sign) \
4834 CONV_ITOF(vfp_##name##to##p, fsz, sign) \
4835 CONV_FTOI(vfp_to##name##p, fsz, sign, ) \
4836 CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero)
4837
4838 FLOAT_CONVS(si, s, 32, )
4839 FLOAT_CONVS(si, d, 64, )
4840 FLOAT_CONVS(ui, s, 32, u)
4841 FLOAT_CONVS(ui, d, 64, u)
4842
4843 #undef CONV_ITOF
4844 #undef CONV_FTOI
4845 #undef FLOAT_CONVS
4846
4847 /* floating point conversion */
4848 float64 VFP_HELPER(fcvtd, s)(float32 x, CPUARMState *env)
4849 {
4850     float64 r = float32_to_float64(x, &env->vfp.fp_status);
4851     /* ARM requires that S<->D conversion of any kind of NaN generates
4852      * a quiet NaN by forcing the most significant frac bit to 1.
4853      */
4854     return float64_maybe_silence_nan(r);
4855 }
4856
4857 float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env)
4858 {
4859     float32 r =  float64_to_float32(x, &env->vfp.fp_status);
4860     /* ARM requires that S<->D conversion of any kind of NaN generates
4861      * a quiet NaN by forcing the most significant frac bit to 1.
4862      */
4863     return float32_maybe_silence_nan(r);
4864 }
4865
4866 /* VFP3 fixed point conversion.  */
4867 #define VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
4868 float##fsz HELPER(vfp_##name##to##p)(uint##isz##_t  x, uint32_t shift, \
4869                                      void *fpstp) \
4870 { \
4871     float_status *fpst = fpstp; \
4872     float##fsz tmp; \
4873     tmp = itype##_to_##float##fsz(x, fpst); \
4874     return float##fsz##_scalbn(tmp, -(int)shift, fpst); \
4875 }
4876
4877 /* Notice that we want only input-denormal exception flags from the
4878  * scalbn operation: the other possible flags (overflow+inexact if
4879  * we overflow to infinity, output-denormal) aren't correct for the
4880  * complete scale-and-convert operation.
4881  */
4882 #define VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, round) \
4883 uint##isz##_t HELPER(vfp_to##name##p##round)(float##fsz x, \
4884                                              uint32_t shift, \
4885                                              void *fpstp) \
4886 { \
4887     float_status *fpst = fpstp; \
4888     int old_exc_flags = get_float_exception_flags(fpst); \
4889     float##fsz tmp; \
4890     if (float##fsz##_is_any_nan(x)) { \
4891         float_raise(float_flag_invalid, fpst); \
4892         return 0; \
4893     } \
4894     tmp = float##fsz##_scalbn(x, shift, fpst); \
4895     old_exc_flags |= get_float_exception_flags(fpst) \
4896         & float_flag_input_denormal; \
4897     set_float_exception_flags(old_exc_flags, fpst); \
4898     return float##fsz##_to_##itype##round(tmp, fpst); \
4899 }
4900
4901 #define VFP_CONV_FIX(name, p, fsz, isz, itype)                   \
4902 VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype)                     \
4903 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, _round_to_zero) \
4904 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
4905
4906 #define VFP_CONV_FIX_A64(name, p, fsz, isz, itype)               \
4907 VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype)                     \
4908 VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
4909
4910 VFP_CONV_FIX(sh, d, 64, 64, int16)
4911 VFP_CONV_FIX(sl, d, 64, 64, int32)
4912 VFP_CONV_FIX_A64(sq, d, 64, 64, int64)
4913 VFP_CONV_FIX(uh, d, 64, 64, uint16)
4914 VFP_CONV_FIX(ul, d, 64, 64, uint32)
4915 VFP_CONV_FIX_A64(uq, d, 64, 64, uint64)
4916 VFP_CONV_FIX(sh, s, 32, 32, int16)
4917 VFP_CONV_FIX(sl, s, 32, 32, int32)
4918 VFP_CONV_FIX_A64(sq, s, 32, 64, int64)
4919 VFP_CONV_FIX(uh, s, 32, 32, uint16)
4920 VFP_CONV_FIX(ul, s, 32, 32, uint32)
4921 VFP_CONV_FIX_A64(uq, s, 32, 64, uint64)
4922 #undef VFP_CONV_FIX
4923 #undef VFP_CONV_FIX_FLOAT
4924 #undef VFP_CONV_FLOAT_FIX_ROUND
4925
4926 /* Set the current fp rounding mode and return the old one.
4927  * The argument is a softfloat float_round_ value.
4928  */
4929 uint32_t HELPER(set_rmode)(uint32_t rmode, CPUARMState *env)
4930 {
4931     float_status *fp_status = &env->vfp.fp_status;
4932
4933     uint32_t prev_rmode = get_float_rounding_mode(fp_status);
4934     set_float_rounding_mode(rmode, fp_status);
4935
4936     return prev_rmode;
4937 }
4938
4939 /* Set the current fp rounding mode in the standard fp status and return
4940  * the old one. This is for NEON instructions that need to change the
4941  * rounding mode but wish to use the standard FPSCR values for everything
4942  * else. Always set the rounding mode back to the correct value after
4943  * modifying it.
4944  * The argument is a softfloat float_round_ value.
4945  */
4946 uint32_t HELPER(set_neon_rmode)(uint32_t rmode, CPUARMState *env)
4947 {
4948     float_status *fp_status = &env->vfp.standard_fp_status;
4949
4950     uint32_t prev_rmode = get_float_rounding_mode(fp_status);
4951     set_float_rounding_mode(rmode, fp_status);
4952
4953     return prev_rmode;
4954 }
4955
4956 /* Half precision conversions.  */
4957 static float32 do_fcvt_f16_to_f32(uint32_t a, CPUARMState *env, float_status *s)
4958 {
4959     int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
4960     float32 r = float16_to_float32(make_float16(a), ieee, s);
4961     if (ieee) {
4962         return float32_maybe_silence_nan(r);
4963     }
4964     return r;
4965 }
4966
4967 static uint32_t do_fcvt_f32_to_f16(float32 a, CPUARMState *env, float_status *s)
4968 {
4969     int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
4970     float16 r = float32_to_float16(a, ieee, s);
4971     if (ieee) {
4972         r = float16_maybe_silence_nan(r);
4973     }
4974     return float16_val(r);
4975 }
4976
4977 float32 HELPER(neon_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env)
4978 {
4979     return do_fcvt_f16_to_f32(a, env, &env->vfp.standard_fp_status);
4980 }
4981
4982 uint32_t HELPER(neon_fcvt_f32_to_f16)(float32 a, CPUARMState *env)
4983 {
4984     return do_fcvt_f32_to_f16(a, env, &env->vfp.standard_fp_status);
4985 }
4986
4987 float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env)
4988 {
4989     return do_fcvt_f16_to_f32(a, env, &env->vfp.fp_status);
4990 }
4991
4992 uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUARMState *env)
4993 {
4994     return do_fcvt_f32_to_f16(a, env, &env->vfp.fp_status);
4995 }
4996
4997 float64 HELPER(vfp_fcvt_f16_to_f64)(uint32_t a, CPUARMState *env)
4998 {
4999     int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
5000     float64 r = float16_to_float64(make_float16(a), ieee, &env->vfp.fp_status);
5001     if (ieee) {
5002         return float64_maybe_silence_nan(r);
5003     }
5004     return r;
5005 }
5006
5007 uint32_t HELPER(vfp_fcvt_f64_to_f16)(float64 a, CPUARMState *env)
5008 {
5009     int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
5010     float16 r = float64_to_float16(a, ieee, &env->vfp.fp_status);
5011     if (ieee) {
5012         r = float16_maybe_silence_nan(r);
5013     }
5014     return float16_val(r);
5015 }
5016
5017 #define float32_two make_float32(0x40000000)
5018 #define float32_three make_float32(0x40400000)
5019 #define float32_one_point_five make_float32(0x3fc00000)
5020
5021 float32 HELPER(recps_f32)(float32 a, float32 b, CPUARMState *env)
5022 {
5023     float_status *s = &env->vfp.standard_fp_status;
5024     if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
5025         (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
5026         if (!(float32_is_zero(a) || float32_is_zero(b))) {
5027             float_raise(float_flag_input_denormal, s);
5028         }
5029         return float32_two;
5030     }
5031     return float32_sub(float32_two, float32_mul(a, b, s), s);
5032 }
5033
5034 float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUARMState *env)
5035 {
5036     float_status *s = &env->vfp.standard_fp_status;
5037     float32 product;
5038     if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
5039         (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
5040         if (!(float32_is_zero(a) || float32_is_zero(b))) {
5041             float_raise(float_flag_input_denormal, s);
5042         }
5043         return float32_one_point_five;
5044     }
5045     product = float32_mul(a, b, s);
5046     return float32_div(float32_sub(float32_three, product, s), float32_two, s);
5047 }
5048
5049 /* NEON helpers.  */
5050
5051 /* Constants 256 and 512 are used in some helpers; we avoid relying on
5052  * int->float conversions at run-time.  */
5053 #define float64_256 make_float64(0x4070000000000000LL)
5054 #define float64_512 make_float64(0x4080000000000000LL)
5055 #define float32_maxnorm make_float32(0x7f7fffff)
5056 #define float64_maxnorm make_float64(0x7fefffffffffffffLL)
5057
5058 /* Reciprocal functions
5059  *
5060  * The algorithm that must be used to calculate the estimate
5061  * is specified by the ARM ARM, see FPRecipEstimate()
5062  */
5063
5064 static float64 recip_estimate(float64 a, float_status *real_fp_status)
5065 {
5066     /* These calculations mustn't set any fp exception flags,
5067      * so we use a local copy of the fp_status.
5068      */
5069     float_status dummy_status = *real_fp_status;
5070     float_status *s = &dummy_status;
5071     /* q = (int)(a * 512.0) */
5072     float64 q = float64_mul(float64_512, a, s);
5073     int64_t q_int = float64_to_int64_round_to_zero(q, s);
5074
5075     /* r = 1.0 / (((double)q + 0.5) / 512.0) */
5076     q = int64_to_float64(q_int, s);
5077     q = float64_add(q, float64_half, s);
5078     q = float64_div(q, float64_512, s);
5079     q = float64_div(float64_one, q, s);
5080
5081     /* s = (int)(256.0 * r + 0.5) */
5082     q = float64_mul(q, float64_256, s);
5083     q = float64_add(q, float64_half, s);
5084     q_int = float64_to_int64_round_to_zero(q, s);
5085
5086     /* return (double)s / 256.0 */
5087     return float64_div(int64_to_float64(q_int, s), float64_256, s);
5088 }
5089
5090 /* Common wrapper to call recip_estimate */
5091 static float64 call_recip_estimate(float64 num, int off, float_status *fpst)
5092 {
5093     uint64_t val64 = float64_val(num);
5094     uint64_t frac = extract64(val64, 0, 52);
5095     int64_t exp = extract64(val64, 52, 11);
5096     uint64_t sbit;
5097     float64 scaled, estimate;
5098
5099     /* Generate the scaled number for the estimate function */
5100     if (exp == 0) {
5101         if (extract64(frac, 51, 1) == 0) {
5102             exp = -1;
5103             frac = extract64(frac, 0, 50) << 2;
5104         } else {
5105             frac = extract64(frac, 0, 51) << 1;
5106         }
5107     }
5108
5109     /* scaled = '0' : '01111111110' : fraction<51:44> : Zeros(44); */
5110     scaled = make_float64((0x3feULL << 52)
5111                           | extract64(frac, 44, 8) << 44);
5112
5113     estimate = recip_estimate(scaled, fpst);
5114
5115     /* Build new result */
5116     val64 = float64_val(estimate);
5117     sbit = 0x8000000000000000ULL & val64;
5118     exp = off - exp;
5119     frac = extract64(val64, 0, 52);
5120
5121     if (exp == 0) {
5122         frac = 1ULL << 51 | extract64(frac, 1, 51);
5123     } else if (exp == -1) {
5124         frac = 1ULL << 50 | extract64(frac, 2, 50);
5125         exp = 0;
5126     }
5127
5128     return make_float64(sbit | (exp << 52) | frac);
5129 }
5130
5131 static bool round_to_inf(float_status *fpst, bool sign_bit)
5132 {
5133     switch (fpst->float_rounding_mode) {
5134     case float_round_nearest_even: /* Round to Nearest */
5135         return true;
5136     case float_round_up: /* Round to +Inf */
5137         return !sign_bit;
5138     case float_round_down: /* Round to -Inf */
5139         return sign_bit;
5140     case float_round_to_zero: /* Round to Zero */
5141         return false;
5142     }
5143
5144     g_assert_not_reached();
5145 }
5146
5147 float32 HELPER(recpe_f32)(float32 input, void *fpstp)
5148 {
5149     float_status *fpst = fpstp;
5150     float32 f32 = float32_squash_input_denormal(input, fpst);
5151     uint32_t f32_val = float32_val(f32);
5152     uint32_t f32_sbit = 0x80000000ULL & f32_val;
5153     int32_t f32_exp = extract32(f32_val, 23, 8);
5154     uint32_t f32_frac = extract32(f32_val, 0, 23);
5155     float64 f64, r64;
5156     uint64_t r64_val;
5157     int64_t r64_exp;
5158     uint64_t r64_frac;
5159
5160     if (float32_is_any_nan(f32)) {
5161         float32 nan = f32;
5162         if (float32_is_signaling_nan(f32)) {
5163             float_raise(float_flag_invalid, fpst);
5164             nan = float32_maybe_silence_nan(f32);
5165         }
5166         if (fpst->default_nan_mode) {
5167             nan =  float32_default_nan;
5168         }
5169         return nan;
5170     } else if (float32_is_infinity(f32)) {
5171         return float32_set_sign(float32_zero, float32_is_neg(f32));
5172     } else if (float32_is_zero(f32)) {
5173         float_raise(float_flag_divbyzero, fpst);
5174         return float32_set_sign(float32_infinity, float32_is_neg(f32));
5175     } else if ((f32_val & ~(1ULL << 31)) < (1ULL << 21)) {
5176         /* Abs(value) < 2.0^-128 */
5177         float_raise(float_flag_overflow | float_flag_inexact, fpst);
5178         if (round_to_inf(fpst, f32_sbit)) {
5179             return float32_set_sign(float32_infinity, float32_is_neg(f32));
5180         } else {
5181             return float32_set_sign(float32_maxnorm, float32_is_neg(f32));
5182         }
5183     } else if (f32_exp >= 253 && fpst->flush_to_zero) {
5184         float_raise(float_flag_underflow, fpst);
5185         return float32_set_sign(float32_zero, float32_is_neg(f32));
5186     }
5187
5188
5189     f64 = make_float64(((int64_t)(f32_exp) << 52) | (int64_t)(f32_frac) << 29);
5190     r64 = call_recip_estimate(f64, 253, fpst);
5191     r64_val = float64_val(r64);
5192     r64_exp = extract64(r64_val, 52, 11);
5193     r64_frac = extract64(r64_val, 0, 52);
5194
5195     /* result = sign : result_exp<7:0> : fraction<51:29>; */
5196     return make_float32(f32_sbit |
5197                         (r64_exp & 0xff) << 23 |
5198                         extract64(r64_frac, 29, 24));
5199 }
5200
5201 float64 HELPER(recpe_f64)(float64 input, void *fpstp)
5202 {
5203     float_status *fpst = fpstp;
5204     float64 f64 = float64_squash_input_denormal(input, fpst);
5205     uint64_t f64_val = float64_val(f64);
5206     uint64_t f64_sbit = 0x8000000000000000ULL & f64_val;
5207     int64_t f64_exp = extract64(f64_val, 52, 11);
5208     float64 r64;
5209     uint64_t r64_val;
5210     int64_t r64_exp;
5211     uint64_t r64_frac;
5212
5213     /* Deal with any special cases */
5214     if (float64_is_any_nan(f64)) {
5215         float64 nan = f64;
5216         if (float64_is_signaling_nan(f64)) {
5217             float_raise(float_flag_invalid, fpst);
5218             nan = float64_maybe_silence_nan(f64);
5219         }
5220         if (fpst->default_nan_mode) {
5221             nan =  float64_default_nan;
5222         }
5223         return nan;
5224     } else if (float64_is_infinity(f64)) {
5225         return float64_set_sign(float64_zero, float64_is_neg(f64));
5226     } else if (float64_is_zero(f64)) {
5227         float_raise(float_flag_divbyzero, fpst);
5228         return float64_set_sign(float64_infinity, float64_is_neg(f64));
5229     } else if ((f64_val & ~(1ULL << 63)) < (1ULL << 50)) {
5230         /* Abs(value) < 2.0^-1024 */
5231         float_raise(float_flag_overflow | float_flag_inexact, fpst);
5232         if (round_to_inf(fpst, f64_sbit)) {
5233             return float64_set_sign(float64_infinity, float64_is_neg(f64));
5234         } else {
5235             return float64_set_sign(float64_maxnorm, float64_is_neg(f64));
5236         }
5237     } else if (f64_exp >= 1023 && fpst->flush_to_zero) {
5238         float_raise(float_flag_underflow, fpst);
5239         return float64_set_sign(float64_zero, float64_is_neg(f64));
5240     }
5241
5242     r64 = call_recip_estimate(f64, 2045, fpst);
5243     r64_val = float64_val(r64);
5244     r64_exp = extract64(r64_val, 52, 11);
5245     r64_frac = extract64(r64_val, 0, 52);
5246
5247     /* result = sign : result_exp<10:0> : fraction<51:0> */
5248     return make_float64(f64_sbit |
5249                         ((r64_exp & 0x7ff) << 52) |
5250                         r64_frac);
5251 }
5252
5253 /* The algorithm that must be used to calculate the estimate
5254  * is specified by the ARM ARM.
5255  */
5256 static float64 recip_sqrt_estimate(float64 a, float_status *real_fp_status)
5257 {
5258     /* These calculations mustn't set any fp exception flags,
5259      * so we use a local copy of the fp_status.
5260      */
5261     float_status dummy_status = *real_fp_status;
5262     float_status *s = &dummy_status;
5263     float64 q;
5264     int64_t q_int;
5265
5266     if (float64_lt(a, float64_half, s)) {
5267         /* range 0.25 <= a < 0.5 */
5268
5269         /* a in units of 1/512 rounded down */
5270         /* q0 = (int)(a * 512.0);  */
5271         q = float64_mul(float64_512, a, s);
5272         q_int = float64_to_int64_round_to_zero(q, s);
5273
5274         /* reciprocal root r */
5275         /* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0);  */
5276         q = int64_to_float64(q_int, s);
5277         q = float64_add(q, float64_half, s);
5278         q = float64_div(q, float64_512, s);
5279         q = float64_sqrt(q, s);
5280         q = float64_div(float64_one, q, s);
5281     } else {
5282         /* range 0.5 <= a < 1.0 */
5283
5284         /* a in units of 1/256 rounded down */
5285         /* q1 = (int)(a * 256.0); */
5286         q = float64_mul(float64_256, a, s);
5287         int64_t q_int = float64_to_int64_round_to_zero(q, s);
5288
5289         /* reciprocal root r */
5290         /* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */
5291         q = int64_to_float64(q_int, s);
5292         q = float64_add(q, float64_half, s);
5293         q = float64_div(q, float64_256, s);
5294         q = float64_sqrt(q, s);
5295         q = float64_div(float64_one, q, s);
5296     }
5297     /* r in units of 1/256 rounded to nearest */
5298     /* s = (int)(256.0 * r + 0.5); */
5299
5300     q = float64_mul(q, float64_256,s );
5301     q = float64_add(q, float64_half, s);
5302     q_int = float64_to_int64_round_to_zero(q, s);
5303
5304     /* return (double)s / 256.0;*/
5305     return float64_div(int64_to_float64(q_int, s), float64_256, s);
5306 }
5307
5308 float32 HELPER(rsqrte_f32)(float32 input, void *fpstp)
5309 {
5310     float_status *s = fpstp;
5311     float32 f32 = float32_squash_input_denormal(input, s);
5312     uint32_t val = float32_val(f32);
5313     uint32_t f32_sbit = 0x80000000 & val;
5314     int32_t f32_exp = extract32(val, 23, 8);
5315     uint32_t f32_frac = extract32(val, 0, 23);
5316     uint64_t f64_frac;
5317     uint64_t val64;
5318     int result_exp;
5319     float64 f64;
5320
5321     if (float32_is_any_nan(f32)) {
5322         float32 nan = f32;
5323         if (float32_is_signaling_nan(f32)) {
5324             float_raise(float_flag_invalid, s);
5325             nan = float32_maybe_silence_nan(f32);
5326         }
5327         if (s->default_nan_mode) {
5328             nan =  float32_default_nan;
5329         }
5330         return nan;
5331     } else if (float32_is_zero(f32)) {
5332         float_raise(float_flag_divbyzero, s);
5333         return float32_set_sign(float32_infinity, float32_is_neg(f32));
5334     } else if (float32_is_neg(f32)) {
5335         float_raise(float_flag_invalid, s);
5336         return float32_default_nan;
5337     } else if (float32_is_infinity(f32)) {
5338         return float32_zero;
5339     }
5340
5341     /* Scale and normalize to a double-precision value between 0.25 and 1.0,
5342      * preserving the parity of the exponent.  */
5343
5344     f64_frac = ((uint64_t) f32_frac) << 29;
5345     if (f32_exp == 0) {
5346         while (extract64(f64_frac, 51, 1) == 0) {
5347             f64_frac = f64_frac << 1;
5348             f32_exp = f32_exp-1;
5349         }
5350         f64_frac = extract64(f64_frac, 0, 51) << 1;
5351     }
5352
5353     if (extract64(f32_exp, 0, 1) == 0) {
5354         f64 = make_float64(((uint64_t) f32_sbit) << 32
5355                            | (0x3feULL << 52)
5356                            | f64_frac);
5357     } else {
5358         f64 = make_float64(((uint64_t) f32_sbit) << 32
5359                            | (0x3fdULL << 52)
5360                            | f64_frac);
5361     }
5362
5363     result_exp = (380 - f32_exp) / 2;
5364
5365     f64 = recip_sqrt_estimate(f64, s);
5366
5367     val64 = float64_val(f64);
5368
5369     val = ((result_exp & 0xff) << 23)
5370         | ((val64 >> 29)  & 0x7fffff);
5371     return make_float32(val);
5372 }
5373
5374 float64 HELPER(rsqrte_f64)(float64 input, void *fpstp)
5375 {
5376     float_status *s = fpstp;
5377     float64 f64 = float64_squash_input_denormal(input, s);
5378     uint64_t val = float64_val(f64);
5379     uint64_t f64_sbit = 0x8000000000000000ULL & val;
5380     int64_t f64_exp = extract64(val, 52, 11);
5381     uint64_t f64_frac = extract64(val, 0, 52);
5382     int64_t result_exp;
5383     uint64_t result_frac;
5384
5385     if (float64_is_any_nan(f64)) {
5386         float64 nan = f64;
5387         if (float64_is_signaling_nan(f64)) {
5388             float_raise(float_flag_invalid, s);
5389             nan = float64_maybe_silence_nan(f64);
5390         }
5391         if (s->default_nan_mode) {
5392             nan =  float64_default_nan;
5393         }
5394         return nan;
5395     } else if (float64_is_zero(f64)) {
5396         float_raise(float_flag_divbyzero, s);
5397         return float64_set_sign(float64_infinity, float64_is_neg(f64));
5398     } else if (float64_is_neg(f64)) {
5399         float_raise(float_flag_invalid, s);
5400         return float64_default_nan;
5401     } else if (float64_is_infinity(f64)) {
5402         return float64_zero;
5403     }
5404
5405     /* Scale and normalize to a double-precision value between 0.25 and 1.0,
5406      * preserving the parity of the exponent.  */
5407
5408     if (f64_exp == 0) {
5409         while (extract64(f64_frac, 51, 1) == 0) {
5410             f64_frac = f64_frac << 1;
5411             f64_exp = f64_exp - 1;
5412         }
5413         f64_frac = extract64(f64_frac, 0, 51) << 1;
5414     }
5415
5416     if (extract64(f64_exp, 0, 1) == 0) {
5417         f64 = make_float64(f64_sbit
5418                            | (0x3feULL << 52)
5419                            | f64_frac);
5420     } else {
5421         f64 = make_float64(f64_sbit
5422                            | (0x3fdULL << 52)
5423                            | f64_frac);
5424     }
5425
5426     result_exp = (3068 - f64_exp) / 2;
5427
5428     f64 = recip_sqrt_estimate(f64, s);
5429
5430     result_frac = extract64(float64_val(f64), 0, 52);
5431
5432     return make_float64(f64_sbit |
5433                         ((result_exp & 0x7ff) << 52) |
5434                         result_frac);
5435 }
5436
5437 uint32_t HELPER(recpe_u32)(uint32_t a, void *fpstp)
5438 {
5439     float_status *s = fpstp;
5440     float64 f64;
5441
5442     if ((a & 0x80000000) == 0) {
5443         return 0xffffffff;
5444     }
5445
5446     f64 = make_float64((0x3feULL << 52)
5447                        | ((int64_t)(a & 0x7fffffff) << 21));
5448
5449     f64 = recip_estimate(f64, s);
5450
5451     return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
5452 }
5453
5454 uint32_t HELPER(rsqrte_u32)(uint32_t a, void *fpstp)
5455 {
5456     float_status *fpst = fpstp;
5457     float64 f64;
5458
5459     if ((a & 0xc0000000) == 0) {
5460         return 0xffffffff;
5461     }
5462
5463     if (a & 0x80000000) {
5464         f64 = make_float64((0x3feULL << 52)
5465                            | ((uint64_t)(a & 0x7fffffff) << 21));
5466     } else { /* bits 31-30 == '01' */
5467         f64 = make_float64((0x3fdULL << 52)
5468                            | ((uint64_t)(a & 0x3fffffff) << 22));
5469     }
5470
5471     f64 = recip_sqrt_estimate(f64, fpst);
5472
5473     return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
5474 }
5475
5476 /* VFPv4 fused multiply-accumulate */
5477 float32 VFP_HELPER(muladd, s)(float32 a, float32 b, float32 c, void *fpstp)
5478 {
5479     float_status *fpst = fpstp;
5480     return float32_muladd(a, b, c, 0, fpst);
5481 }
5482
5483 float64 VFP_HELPER(muladd, d)(float64 a, float64 b, float64 c, void *fpstp)
5484 {
5485     float_status *fpst = fpstp;
5486     return float64_muladd(a, b, c, 0, fpst);
5487 }
5488
5489 /* ARMv8 round to integral */
5490 float32 HELPER(rints_exact)(float32 x, void *fp_status)
5491 {
5492     return float32_round_to_int(x, fp_status);
5493 }
5494
5495 float64 HELPER(rintd_exact)(float64 x, void *fp_status)
5496 {
5497     return float64_round_to_int(x, fp_status);
5498 }
5499
5500 float32 HELPER(rints)(float32 x, void *fp_status)
5501 {
5502     int old_flags = get_float_exception_flags(fp_status), new_flags;
5503     float32 ret;
5504
5505     ret = float32_round_to_int(x, fp_status);
5506
5507     /* Suppress any inexact exceptions the conversion produced */
5508     if (!(old_flags & float_flag_inexact)) {
5509         new_flags = get_float_exception_flags(fp_status);
5510         set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status);
5511     }
5512
5513     return ret;
5514 }
5515
5516 float64 HELPER(rintd)(float64 x, void *fp_status)
5517 {
5518     int old_flags = get_float_exception_flags(fp_status), new_flags;
5519     float64 ret;
5520
5521     ret = float64_round_to_int(x, fp_status);
5522
5523     new_flags = get_float_exception_flags(fp_status);
5524
5525     /* Suppress any inexact exceptions the conversion produced */
5526     if (!(old_flags & float_flag_inexact)) {
5527         new_flags = get_float_exception_flags(fp_status);
5528         set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status);
5529     }
5530
5531     return ret;
5532 }
5533
5534 /* Convert ARM rounding mode to softfloat */
5535 int arm_rmode_to_sf(int rmode)
5536 {
5537     switch (rmode) {
5538     case FPROUNDING_TIEAWAY:
5539         rmode = float_round_ties_away;
5540         break;
5541     case FPROUNDING_ODD:
5542         /* FIXME: add support for TIEAWAY and ODD */
5543         qemu_log_mask(LOG_UNIMP, "arm: unimplemented rounding mode: %d\n",
5544                       rmode);
5545     case FPROUNDING_TIEEVEN:
5546     default:
5547         rmode = float_round_nearest_even;
5548         break;
5549     case FPROUNDING_POSINF:
5550         rmode = float_round_up;
5551         break;
5552     case FPROUNDING_NEGINF:
5553         rmode = float_round_down;
5554         break;
5555     case FPROUNDING_ZERO:
5556         rmode = float_round_to_zero;
5557         break;
5558     }
5559     return rmode;
5560 }
5561
5562 /* CRC helpers.
5563  * The upper bytes of val (above the number specified by 'bytes') must have
5564  * been zeroed out by the caller.
5565  */
5566 uint32_t HELPER(crc32)(uint32_t acc, uint32_t val, uint32_t bytes)
5567 {
5568     uint8_t buf[4];
5569
5570     stl_le_p(buf, val);
5571
5572     /* zlib crc32 converts the accumulator and output to one's complement.  */
5573     return crc32(acc ^ 0xffffffff, buf, bytes) ^ 0xffffffff;
5574 }
5575
5576 uint32_t HELPER(crc32c)(uint32_t acc, uint32_t val, uint32_t bytes)
5577 {
5578     uint8_t buf[4];
5579
5580     stl_le_p(buf, val);
5581
5582     /* Linux crc32c converts the output to one's complement.  */
5583     return crc32c(acc, buf, bytes) ^ 0xffffffff;
5584 }