target/loongarch/cpu.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * QEMU LoongArch CPU
   4  *
   5  * Copyright (c) 2021 Loongson Technology Corporation Limited
   6  */
   7
   8 #ifndef LOONGARCH_CPU_H
   9 #define LOONGARCH_CPU_H
  10
  11 #include "qemu/int128.h"
  12 #include "exec/cpu-defs.h"
  13 #include "fpu/softfloat-types.h"
  14 #include "hw/registerfields.h"
  15 #include "qemu/timer.h"
  16 #ifndef CONFIG_USER_ONLY
  17 #include "exec/memory.h"
  18 #endif
  19 #include "cpu-csr.h"
  20
  21 #define IOCSRF_TEMP             0
  22 #define IOCSRF_NODECNT          1
  23 #define IOCSRF_MSI              2
  24 #define IOCSRF_EXTIOI           3
  25 #define IOCSRF_CSRIPI           4
  26 #define IOCSRF_FREQCSR          5
  27 #define IOCSRF_FREQSCALE        6
  28 #define IOCSRF_DVFSV1           7
  29 #define IOCSRF_GMOD             9
  30 #define IOCSRF_VM               11
  31
  32 #define VERSION_REG             0x0
  33 #define FEATURE_REG             0x8
  34 #define VENDOR_REG              0x10
  35 #define CPUNAME_REG             0x20
  36 #define MISC_FUNC_REG           0x420
  37 #define IOCSRM_EXTIOI_EN        48
  38
  39 #define IOCSR_MEM_SIZE          0x428
  40
  41 #define TCG_GUEST_DEFAULT_MO (0)
  42
  43 #define FCSR0_M1    0x1f         /* FCSR1 mask, Enables */
  44 #define FCSR0_M2    0x1f1f0000   /* FCSR2 mask, Cause and Flags */
  45 #define FCSR0_M3    0x300        /* FCSR3 mask, Round Mode */
  46 #define FCSR0_RM    8            /* Round Mode bit num on fcsr0 */
  47
  48 FIELD(FCSR0, ENABLES, 0, 5)
  49 FIELD(FCSR0, RM, 8, 2)
  50 FIELD(FCSR0, FLAGS, 16, 5)
  51 FIELD(FCSR0, CAUSE, 24, 5)
  52
  53 #define GET_FP_CAUSE(REG)      FIELD_EX32(REG, FCSR0, CAUSE)
  54 #define SET_FP_CAUSE(REG, V) \
  55     do { \
  56         (REG) = FIELD_DP32(REG, FCSR0, CAUSE, V); \
  57     } while (0)
  58 #define UPDATE_FP_CAUSE(REG, V) \
  59     do { \
  60         (REG) |= FIELD_DP32(0, FCSR0, CAUSE, V); \
  61     } while (0)
  62
  63 #define GET_FP_ENABLES(REG)    FIELD_EX32(REG, FCSR0, ENABLES)
  64 #define SET_FP_ENABLES(REG, V) \
  65     do { \
  66         (REG) = FIELD_DP32(REG, FCSR0, ENABLES, V); \
  67     } while (0)
  68
  69 #define GET_FP_FLAGS(REG)      FIELD_EX32(REG, FCSR0, FLAGS)
  70 #define SET_FP_FLAGS(REG, V) \
  71     do { \
  72         (REG) = FIELD_DP32(REG, FCSR0, FLAGS, V); \
  73     } while (0)
  74
  75 #define UPDATE_FP_FLAGS(REG, V) \
  76     do { \
  77         (REG) |= FIELD_DP32(0, FCSR0, FLAGS, V); \
  78     } while (0)
  79
  80 #define FP_INEXACT        1
  81 #define FP_UNDERFLOW      2
  82 #define FP_OVERFLOW       4
  83 #define FP_DIV0           8
  84 #define FP_INVALID        16
  85
  86 #define EXCODE(code, subcode) ( ((subcode) << 6) | (code) )
  87 #define EXCODE_MCODE(code)    ( (code) & 0x3f )
  88 #define EXCODE_SUBCODE(code)  ( (code) >> 6 )
  89
  90 #define  EXCCODE_EXTERNAL_INT        64   /* plus external interrupt number */
  91 #define  EXCCODE_INT                 EXCODE(0, 0)
  92 #define  EXCCODE_PIL                 EXCODE(1, 0)
  93 #define  EXCCODE_PIS                 EXCODE(2, 0)
  94 #define  EXCCODE_PIF                 EXCODE(3, 0)
  95 #define  EXCCODE_PME                 EXCODE(4, 0)
  96 #define  EXCCODE_PNR                 EXCODE(5, 0)
  97 #define  EXCCODE_PNX                 EXCODE(6, 0)
  98 #define  EXCCODE_PPI                 EXCODE(7, 0)
  99 #define  EXCCODE_ADEF                EXCODE(8, 0) /* Different exception subcode */
 100 #define  EXCCODE_ADEM                EXCODE(8, 1)
 101 #define  EXCCODE_ALE                 EXCODE(9, 0)
 102 #define  EXCCODE_BCE                 EXCODE(10, 0)
 103 #define  EXCCODE_SYS                 EXCODE(11, 0)
 104 #define  EXCCODE_BRK                 EXCODE(12, 0)
 105 #define  EXCCODE_INE                 EXCODE(13, 0)
 106 #define  EXCCODE_IPE                 EXCODE(14, 0)
 107 #define  EXCCODE_FPD                 EXCODE(15, 0)
 108 #define  EXCCODE_SXD                 EXCODE(16, 0)
 109 #define  EXCCODE_ASXD                EXCODE(17, 0)
 110 #define  EXCCODE_FPE                 EXCODE(18, 0) /* Different exception subcode */
 111 #define  EXCCODE_VFPE                EXCODE(18, 1)
 112 #define  EXCCODE_WPEF                EXCODE(19, 0) /* Different exception subcode */
 113 #define  EXCCODE_WPEM                EXCODE(19, 1)
 114 #define  EXCCODE_BTD                 EXCODE(20, 0)
 115 #define  EXCCODE_BTE                 EXCODE(21, 0)
 116 #define  EXCCODE_DBP                 EXCODE(26, 0) /* Reserved subcode used for debug */
 117
 118 /* cpucfg[0] bits */
 119 FIELD(CPUCFG0, PRID, 0, 32)
 120
 121 /* cpucfg[1] bits */
 122 FIELD(CPUCFG1, ARCH, 0, 2)
 123 FIELD(CPUCFG1, PGMMU, 2, 1)
 124 FIELD(CPUCFG1, IOCSR, 3, 1)
 125 FIELD(CPUCFG1, PALEN, 4, 8)
 126 FIELD(CPUCFG1, VALEN, 12, 8)
 127 FIELD(CPUCFG1, UAL, 20, 1)
 128 FIELD(CPUCFG1, RI, 21, 1)
 129 FIELD(CPUCFG1, EP, 22, 1)
 130 FIELD(CPUCFG1, RPLV, 23, 1)
 131 FIELD(CPUCFG1, HP, 24, 1)
 132 FIELD(CPUCFG1, IOCSR_BRD, 25, 1)
 133 FIELD(CPUCFG1, MSG_INT, 26, 1)
 134
 135 /* cpucfg[1].arch */
 136 #define CPUCFG1_ARCH_LA32R       0
 137 #define CPUCFG1_ARCH_LA32        1
 138 #define CPUCFG1_ARCH_LA64        2
 139
 140 /* cpucfg[2] bits */
 141 FIELD(CPUCFG2, FP, 0, 1)
 142 FIELD(CPUCFG2, FP_SP, 1, 1)
 143 FIELD(CPUCFG2, FP_DP, 2, 1)
 144 FIELD(CPUCFG2, FP_VER, 3, 3)
 145 FIELD(CPUCFG2, LSX, 6, 1)
 146 FIELD(CPUCFG2, LASX, 7, 1)
 147 FIELD(CPUCFG2, COMPLEX, 8, 1)
 148 FIELD(CPUCFG2, CRYPTO, 9, 1)
 149 FIELD(CPUCFG2, LVZ, 10, 1)
 150 FIELD(CPUCFG2, LVZ_VER, 11, 3)
 151 FIELD(CPUCFG2, LLFTP, 14, 1)
 152 FIELD(CPUCFG2, LLFTP_VER, 15, 3)
 153 FIELD(CPUCFG2, LBT_X86, 18, 1)
 154 FIELD(CPUCFG2, LBT_ARM, 19, 1)
 155 FIELD(CPUCFG2, LBT_MIPS, 20, 1)
 156 FIELD(CPUCFG2, LSPW, 21, 1)
 157 FIELD(CPUCFG2, LAM, 22, 1)
 158
 159 /* cpucfg[3] bits */
 160 FIELD(CPUCFG3, CCDMA, 0, 1)
 161 FIELD(CPUCFG3, SFB, 1, 1)
 162 FIELD(CPUCFG3, UCACC, 2, 1)
 163 FIELD(CPUCFG3, LLEXC, 3, 1)
 164 FIELD(CPUCFG3, SCDLY, 4, 1)
 165 FIELD(CPUCFG3, LLDBAR, 5, 1)
 166 FIELD(CPUCFG3, ITLBHMC, 6, 1)
 167 FIELD(CPUCFG3, ICHMC, 7, 1)
 168 FIELD(CPUCFG3, SPW_LVL, 8, 3)
 169 FIELD(CPUCFG3, SPW_HP_HF, 11, 1)
 170 FIELD(CPUCFG3, RVA, 12, 1)
 171 FIELD(CPUCFG3, RVAMAX, 13, 4)
 172
 173 /* cpucfg[4] bits */
 174 FIELD(CPUCFG4, CC_FREQ, 0, 32)
 175
 176 /* cpucfg[5] bits */
 177 FIELD(CPUCFG5, CC_MUL, 0, 16)
 178 FIELD(CPUCFG5, CC_DIV, 16, 16)
 179
 180 /* cpucfg[6] bits */
 181 FIELD(CPUCFG6, PMP, 0, 1)
 182 FIELD(CPUCFG6, PMVER, 1, 3)
 183 FIELD(CPUCFG6, PMNUM, 4, 4)
 184 FIELD(CPUCFG6, PMBITS, 8, 6)
 185 FIELD(CPUCFG6, UPM, 14, 1)
 186
 187 /* cpucfg[16] bits */
 188 FIELD(CPUCFG16, L1_IUPRE, 0, 1)
 189 FIELD(CPUCFG16, L1_IUUNIFY, 1, 1)
 190 FIELD(CPUCFG16, L1_DPRE, 2, 1)
 191 FIELD(CPUCFG16, L2_IUPRE, 3, 1)
 192 FIELD(CPUCFG16, L2_IUUNIFY, 4, 1)
 193 FIELD(CPUCFG16, L2_IUPRIV, 5, 1)
 194 FIELD(CPUCFG16, L2_IUINCL, 6, 1)
 195 FIELD(CPUCFG16, L2_DPRE, 7, 1)
 196 FIELD(CPUCFG16, L2_DPRIV, 8, 1)
 197 FIELD(CPUCFG16, L2_DINCL, 9, 1)
 198 FIELD(CPUCFG16, L3_IUPRE, 10, 1)
 199 FIELD(CPUCFG16, L3_IUUNIFY, 11, 1)
 200 FIELD(CPUCFG16, L3_IUPRIV, 12, 1)
 201 FIELD(CPUCFG16, L3_IUINCL, 13, 1)
 202 FIELD(CPUCFG16, L3_DPRE, 14, 1)
 203 FIELD(CPUCFG16, L3_DPRIV, 15, 1)
 204 FIELD(CPUCFG16, L3_DINCL, 16, 1)
 205
 206 /* cpucfg[17] bits */
 207 FIELD(CPUCFG17, L1IU_WAYS, 0, 16)
 208 FIELD(CPUCFG17, L1IU_SETS, 16, 8)
 209 FIELD(CPUCFG17, L1IU_SIZE, 24, 7)
 210
 211 /* cpucfg[18] bits */
 212 FIELD(CPUCFG18, L1D_WAYS, 0, 16)
 213 FIELD(CPUCFG18, L1D_SETS, 16, 8)
 214 FIELD(CPUCFG18, L1D_SIZE, 24, 7)
 215
 216 /* cpucfg[19] bits */
 217 FIELD(CPUCFG19, L2IU_WAYS, 0, 16)
 218 FIELD(CPUCFG19, L2IU_SETS, 16, 8)
 219 FIELD(CPUCFG19, L2IU_SIZE, 24, 7)
 220
 221 /* cpucfg[20] bits */
 222 FIELD(CPUCFG20, L3IU_WAYS, 0, 16)
 223 FIELD(CPUCFG20, L3IU_SETS, 16, 8)
 224 FIELD(CPUCFG20, L3IU_SIZE, 24, 7)
 225
 226 /*CSR_CRMD */
 227 FIELD(CSR_CRMD, PLV, 0, 2)
 228 FIELD(CSR_CRMD, IE, 2, 1)
 229 FIELD(CSR_CRMD, DA, 3, 1)
 230 FIELD(CSR_CRMD, PG, 4, 1)
 231 FIELD(CSR_CRMD, DATF, 5, 2)
 232 FIELD(CSR_CRMD, DATM, 7, 2)
 233 FIELD(CSR_CRMD, WE, 9, 1)
 234
 235 extern const char * const regnames[32];
 236 extern const char * const fregnames[32];
 237
 238 #define N_IRQS      13
 239 #define IRQ_TIMER   11
 240 #define IRQ_IPI     12
 241
 242 #define LOONGARCH_STLB         2048 /* 2048 STLB */
 243 #define LOONGARCH_MTLB         64   /* 64 MTLB */
 244 #define LOONGARCH_TLB_MAX      (LOONGARCH_STLB + LOONGARCH_MTLB)
 245
 246 /*
 247  * define the ASID PS E VPPN field of TLB
 248  */
 249 FIELD(TLB_MISC, E, 0, 1)
 250 FIELD(TLB_MISC, ASID, 1, 10)
 251 FIELD(TLB_MISC, VPPN, 13, 35)
 252 FIELD(TLB_MISC, PS, 48, 6)
 253
 254 #define LSX_LEN    (128)
 255 #define LASX_LEN   (256)
 256
 257 typedef union VReg {
 258     int8_t   B[LASX_LEN / 8];
 259     int16_t  H[LASX_LEN / 16];
 260     int32_t  W[LASX_LEN / 32];
 261     int64_t  D[LASX_LEN / 64];
 262     uint8_t  UB[LASX_LEN / 8];
 263     uint16_t UH[LASX_LEN / 16];
 264     uint32_t UW[LASX_LEN / 32];
 265     uint64_t UD[LASX_LEN / 64];
 266     Int128   Q[LASX_LEN / 128];
 267 } VReg;
 268
 269 typedef union fpr_t fpr_t;
 270 union fpr_t {
 271     VReg  vreg;
 272 };
 273
 274 struct LoongArchTLB {
 275     uint64_t tlb_misc;
 276     /* Fields corresponding to CSR_TLBELO0/1 */
 277     uint64_t tlb_entry0;
 278     uint64_t tlb_entry1;
 279 };
 280 typedef struct LoongArchTLB LoongArchTLB;
 281
 282 typedef struct CPUArchState {
 283     uint64_t gpr[32];
 284     uint64_t pc;
 285
 286     fpr_t fpr[32];
 287     float_status fp_status;
 288     bool cf[8];
 289
 290     uint32_t fcsr0;
 291     uint32_t fcsr0_mask;
 292
 293     uint32_t cpucfg[21];
 294
 295     uint64_t lladdr; /* LL virtual address compared against SC */
 296     uint64_t llval;
 297
 298     /* LoongArch CSRs */
 299     uint64_t CSR_CRMD;
 300     uint64_t CSR_PRMD;
 301     uint64_t CSR_EUEN;
 302     uint64_t CSR_MISC;
 303     uint64_t CSR_ECFG;
 304     uint64_t CSR_ESTAT;
 305     uint64_t CSR_ERA;
 306     uint64_t CSR_BADV;
 307     uint64_t CSR_BADI;
 308     uint64_t CSR_EENTRY;
 309     uint64_t CSR_TLBIDX;
 310     uint64_t CSR_TLBEHI;
 311     uint64_t CSR_TLBELO0;
 312     uint64_t CSR_TLBELO1;
 313     uint64_t CSR_ASID;
 314     uint64_t CSR_PGDL;
 315     uint64_t CSR_PGDH;
 316     uint64_t CSR_PGD;
 317     uint64_t CSR_PWCL;
 318     uint64_t CSR_PWCH;
 319     uint64_t CSR_STLBPS;
 320     uint64_t CSR_RVACFG;
 321     uint64_t CSR_PRCFG1;
 322     uint64_t CSR_PRCFG2;
 323     uint64_t CSR_PRCFG3;
 324     uint64_t CSR_SAVE[16];
 325     uint64_t CSR_TID;
 326     uint64_t CSR_TCFG;
 327     uint64_t CSR_TVAL;
 328     uint64_t CSR_CNTC;
 329     uint64_t CSR_TICLR;
 330     uint64_t CSR_LLBCTL;
 331     uint64_t CSR_IMPCTL1;
 332     uint64_t CSR_IMPCTL2;
 333     uint64_t CSR_TLBRENTRY;
 334     uint64_t CSR_TLBRBADV;
 335     uint64_t CSR_TLBRERA;
 336     uint64_t CSR_TLBRSAVE;
 337     uint64_t CSR_TLBRELO0;
 338     uint64_t CSR_TLBRELO1;
 339     uint64_t CSR_TLBREHI;
 340     uint64_t CSR_TLBRPRMD;
 341     uint64_t CSR_MERRCTL;
 342     uint64_t CSR_MERRINFO1;
 343     uint64_t CSR_MERRINFO2;
 344     uint64_t CSR_MERRENTRY;
 345     uint64_t CSR_MERRERA;
 346     uint64_t CSR_MERRSAVE;
 347     uint64_t CSR_CTAG;
 348     uint64_t CSR_DMW[4];
 349     uint64_t CSR_DBG;
 350     uint64_t CSR_DERA;
 351     uint64_t CSR_DSAVE;
 352     uint64_t CSR_CPUID;
 353
 354 #ifndef CONFIG_USER_ONLY
 355     LoongArchTLB  tlb[LOONGARCH_TLB_MAX];
 356
 357     AddressSpace address_space_iocsr;
 358     MemoryRegion system_iocsr;
 359     MemoryRegion iocsr_mem;
 360     bool load_elf;
 361     uint64_t elf_address;
 362     /* Store ipistate to access from this struct */
 363     DeviceState *ipistate;
 364 #endif
 365 } CPULoongArchState;
 366
 367 /**
 368  * LoongArchCPU:
 369  * @env: #CPULoongArchState
 370  *
 371  * A LoongArch CPU.
 372  */
 373 struct ArchCPU {
 374     /*< private >*/
 375     CPUState parent_obj;
 376     /*< public >*/
 377
 378     CPULoongArchState env;
 379     QEMUTimer timer;
 380     uint32_t  phy_id;
 381
 382     /* 'compatible' string for this CPU for Linux device trees */
 383     const char *dtb_compatible;
 384 };
 385
 386 #define TYPE_LOONGARCH_CPU "loongarch-cpu"
 387 #define TYPE_LOONGARCH32_CPU "loongarch32-cpu"
 388 #define TYPE_LOONGARCH64_CPU "loongarch64-cpu"
 389
 390 OBJECT_DECLARE_CPU_TYPE(LoongArchCPU, LoongArchCPUClass,
 391                         LOONGARCH_CPU)
 392
 393 /**
 394  * LoongArchCPUClass:
 395  * @parent_realize: The parent class' realize handler.
 396  * @parent_phases: The parent class' reset phase handlers.
 397  *
 398  * A LoongArch CPU model.
 399  */
 400 struct LoongArchCPUClass {
 401     /*< private >*/
 402     CPUClass parent_class;
 403     /*< public >*/
 404
 405     DeviceRealize parent_realize;
 406     ResettablePhases parent_phases;
 407 };
 408
 409 /*
 410  * LoongArch CPUs has 4 privilege levels.
 411  * 0 for kernel mode, 3 for user mode.
 412  * Define an extra index for DA(direct addressing) mode.
 413  */
 414 #define MMU_PLV_KERNEL   0
 415 #define MMU_PLV_USER     3
 416 #define MMU_IDX_KERNEL   MMU_PLV_KERNEL
 417 #define MMU_IDX_USER     MMU_PLV_USER
 418 #define MMU_IDX_DA       4
 419
 420 static inline int cpu_mmu_index(CPULoongArchState *env, bool ifetch)
 421 {
 422 #ifdef CONFIG_USER_ONLY
 423     return MMU_IDX_USER;
 424 #else
 425     if (FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PG)) {
 426         return FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PLV);
 427     }
 428     return MMU_IDX_DA;
 429 #endif
 430 }
 431
 432 static inline bool is_la64(CPULoongArchState *env)
 433 {
 434     return FIELD_EX32(env->cpucfg[1], CPUCFG1, ARCH) == CPUCFG1_ARCH_LA64;
 435 }
 436
 437 static inline bool is_va32(CPULoongArchState *env)
 438 {
 439     /* VA32 if !LA64 or VA32L[1-3] */
 440     bool va32 = !is_la64(env);
 441     uint64_t plv = FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PLV);
 442     if (plv >= 1 && (FIELD_EX64(env->CSR_MISC, CSR_MISC, VA32) & (1 << plv))) {
 443         va32 = true;
 444     }
 445     return va32;
 446 }
 447
 448 static inline void set_pc(CPULoongArchState *env, uint64_t value)
 449 {
 450     if (is_va32(env)) {
 451         env->pc = (uint32_t)value;
 452     } else {
 453         env->pc = value;
 454     }
 455 }
 456
 457 /*
 458  * LoongArch CPUs hardware flags.
 459  */
 460 #define HW_FLAGS_PLV_MASK   R_CSR_CRMD_PLV_MASK  /* 0x03 */
 461 #define HW_FLAGS_CRMD_PG    R_CSR_CRMD_PG_MASK   /* 0x10 */
 462 #define HW_FLAGS_EUEN_FPE   0x04
 463 #define HW_FLAGS_EUEN_SXE   0x08
 464 #define HW_FLAGS_EUEN_ASXE  0x10
 465 #define HW_FLAGS_VA32       0x20
 466
 467 static inline void cpu_get_tb_cpu_state(CPULoongArchState *env, vaddr *pc,
 468                                         uint64_t *cs_base, uint32_t *flags)
 469 {
 470     *pc = env->pc;
 471     *cs_base = 0;
 472     *flags = env->CSR_CRMD & (R_CSR_CRMD_PLV_MASK | R_CSR_CRMD_PG_MASK);
 473     *flags |= FIELD_EX64(env->CSR_EUEN, CSR_EUEN, FPE) * HW_FLAGS_EUEN_FPE;
 474     *flags |= FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE) * HW_FLAGS_EUEN_SXE;
 475     *flags |= FIELD_EX64(env->CSR_EUEN, CSR_EUEN, ASXE) * HW_FLAGS_EUEN_ASXE;
 476     *flags |= is_va32(env) * HW_FLAGS_VA32;
 477 }
 478
 479 void loongarch_cpu_list(void);
 480
 481 #define cpu_list loongarch_cpu_list
 482
 483 #include "exec/cpu-all.h"
 484
 485 #define LOONGARCH_CPU_TYPE_SUFFIX "-" TYPE_LOONGARCH_CPU
 486 #define LOONGARCH_CPU_TYPE_NAME(model) model LOONGARCH_CPU_TYPE_SUFFIX
 487 #define CPU_RESOLVING_TYPE TYPE_LOONGARCH_CPU
 488
 489 #endif /* LOONGARCH_CPU_H */