target/sh4/cpu.h

   1 /*
   2  *  SH4 emulation
   3  *
   4  *  Copyright (c) 2005 Samuel Tardieu
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef SH4_CPU_H
  21 #define SH4_CPU_H
  22
  23 #include "qemu-common.h"
  24 #include "cpu-qom.h"
  25
  26 #define TARGET_LONG_BITS 32
  27 #define ALIGNED_ONLY
  28
  29 /* CPU Subtypes */
  30 #define SH_CPU_SH7750  (1 << 0)
  31 #define SH_CPU_SH7750S (1 << 1)
  32 #define SH_CPU_SH7750R (1 << 2)
  33 #define SH_CPU_SH7751  (1 << 3)
  34 #define SH_CPU_SH7751R (1 << 4)
  35 #define SH_CPU_SH7785  (1 << 5)
  36 #define SH_CPU_SH7750_ALL (SH_CPU_SH7750 | SH_CPU_SH7750S | SH_CPU_SH7750R)
  37 #define SH_CPU_SH7751_ALL (SH_CPU_SH7751 | SH_CPU_SH7751R)
  38
  39 #define CPUArchState struct CPUSH4State
  40
  41 #include "exec/cpu-defs.h"
  42
  43 #include "fpu/softfloat.h"
  44
  45 #define TARGET_PAGE_BITS 12     /* 4k XXXXX */
  46
  47 #define TARGET_PHYS_ADDR_SPACE_BITS 32
  48 #ifdef CONFIG_USER_ONLY
  49 # define TARGET_VIRT_ADDR_SPACE_BITS 31
  50 #else
  51 # define TARGET_VIRT_ADDR_SPACE_BITS 32
  52 #endif
  53
  54 #define SR_MD 30
  55 #define SR_RB 29
  56 #define SR_BL 28
  57 #define SR_FD 15
  58 #define SR_M  9
  59 #define SR_Q  8
  60 #define SR_I3 7
  61 #define SR_I2 6
  62 #define SR_I1 5
  63 #define SR_I0 4
  64 #define SR_S  1
  65 #define SR_T  0
  66
  67 #define FPSCR_MASK             (0x003fffff)
  68 #define FPSCR_FR               (1 << 21)
  69 #define FPSCR_SZ               (1 << 20)
  70 #define FPSCR_PR               (1 << 19)
  71 #define FPSCR_DN               (1 << 18)
  72 #define FPSCR_CAUSE_MASK       (0x3f << 12)
  73 #define FPSCR_CAUSE_SHIFT      (12)
  74 #define FPSCR_CAUSE_E          (1 << 17)
  75 #define FPSCR_CAUSE_V          (1 << 16)
  76 #define FPSCR_CAUSE_Z          (1 << 15)
  77 #define FPSCR_CAUSE_O          (1 << 14)
  78 #define FPSCR_CAUSE_U          (1 << 13)
  79 #define FPSCR_CAUSE_I          (1 << 12)
  80 #define FPSCR_ENABLE_MASK      (0x1f << 7)
  81 #define FPSCR_ENABLE_SHIFT     (7)
  82 #define FPSCR_ENABLE_V         (1 << 11)
  83 #define FPSCR_ENABLE_Z         (1 << 10)
  84 #define FPSCR_ENABLE_O         (1 << 9)
  85 #define FPSCR_ENABLE_U         (1 << 8)
  86 #define FPSCR_ENABLE_I         (1 << 7)
  87 #define FPSCR_FLAG_MASK        (0x1f << 2)
  88 #define FPSCR_FLAG_SHIFT       (2)
  89 #define FPSCR_FLAG_V           (1 << 6)
  90 #define FPSCR_FLAG_Z           (1 << 5)
  91 #define FPSCR_FLAG_O           (1 << 4)
  92 #define FPSCR_FLAG_U           (1 << 3)
  93 #define FPSCR_FLAG_I           (1 << 2)
  94 #define FPSCR_RM_MASK          (0x03 << 0)
  95 #define FPSCR_RM_NEAREST       (0 << 0)
  96 #define FPSCR_RM_ZERO          (1 << 0)
  97
  98 #define DELAY_SLOT_MASK        0x7
  99 #define DELAY_SLOT             (1 << 0)
 100 #define DELAY_SLOT_CONDITIONAL (1 << 1)
 101 #define DELAY_SLOT_RTE         (1 << 2)
 102
 103 #define TB_FLAG_PENDING_MOVCA  (1 << 3)
 104
 105 #define GUSA_SHIFT             4
 106 #ifdef CONFIG_USER_ONLY
 107 #define GUSA_EXCLUSIVE         (1 << 12)
 108 #define GUSA_MASK              ((0xff << GUSA_SHIFT) | GUSA_EXCLUSIVE)
 109 #else
 110 /* Provide dummy versions of the above to allow tests against tbflags
 111    to be elided while avoiding ifdefs.  */
 112 #define GUSA_EXCLUSIVE         0
 113 #define GUSA_MASK              0
 114 #endif
 115
 116 #define TB_FLAG_ENVFLAGS_MASK  (DELAY_SLOT_MASK | GUSA_MASK)
 117
 118 typedef struct tlb_t {
 119     uint32_t vpn;               /* virtual page number */
 120     uint32_t ppn;               /* physical page number */
 121     uint32_t size;              /* mapped page size in bytes */
 122     uint8_t asid;               /* address space identifier */
 123     uint8_t v:1;                /* validity */
 124     uint8_t sz:2;               /* page size */
 125     uint8_t sh:1;               /* share status */
 126     uint8_t c:1;                /* cacheability */
 127     uint8_t pr:2;               /* protection key */
 128     uint8_t d:1;                /* dirty */
 129     uint8_t wt:1;               /* write through */
 130     uint8_t sa:3;               /* space attribute (PCMCIA) */
 131     uint8_t tc:1;               /* timing control */
 132 } tlb_t;
 133
 134 #define UTLB_SIZE 64
 135 #define ITLB_SIZE 4
 136
 137 #define NB_MMU_MODES 2
 138 #define TARGET_INSN_START_EXTRA_WORDS 1
 139
 140 enum sh_features {
 141     SH_FEATURE_SH4A = 1,
 142     SH_FEATURE_BCR3_AND_BCR4 = 2,
 143 };
 144
 145 typedef struct memory_content {
 146     uint32_t address;
 147     uint32_t value;
 148     struct memory_content *next;
 149 } memory_content;
 150
 151 typedef struct CPUSH4State {
 152     uint32_t flags;             /* general execution flags */
 153     uint32_t gregs[24];         /* general registers */
 154     float32 fregs[32];          /* floating point registers */
 155     uint32_t sr;                /* status register (with T split out) */
 156     uint32_t sr_m;              /* M bit of status register */
 157     uint32_t sr_q;              /* Q bit of status register */
 158     uint32_t sr_t;              /* T bit of status register */
 159     uint32_t ssr;               /* saved status register */
 160     uint32_t spc;               /* saved program counter */
 161     uint32_t gbr;               /* global base register */
 162     uint32_t vbr;               /* vector base register */
 163     uint32_t sgr;               /* saved global register 15 */
 164     uint32_t dbr;               /* debug base register */
 165     uint32_t pc;                /* program counter */
 166     uint32_t delayed_pc;        /* target of delayed branch */
 167     uint32_t delayed_cond;      /* condition of delayed branch */
 168     uint32_t mach;              /* multiply and accumulate high */
 169     uint32_t macl;              /* multiply and accumulate low */
 170     uint32_t pr;                /* procedure register */
 171     uint32_t fpscr;             /* floating point status/control register */
 172     uint32_t fpul;              /* floating point communication register */
 173
 174     /* float point status register */
 175     float_status fp_status;
 176
 177     /* Those belong to the specific unit (SH7750) but are handled here */
 178     uint32_t mmucr;             /* MMU control register */
 179     uint32_t pteh;              /* page table entry high register */
 180     uint32_t ptel;              /* page table entry low register */
 181     uint32_t ptea;              /* page table entry assistance register */
 182     uint32_t ttb;               /* tranlation table base register */
 183     uint32_t tea;               /* TLB exception address register */
 184     uint32_t tra;               /* TRAPA exception register */
 185     uint32_t expevt;            /* exception event register */
 186     uint32_t intevt;            /* interrupt event register */
 187
 188     tlb_t itlb[ITLB_SIZE];      /* instruction translation table */
 189     tlb_t utlb[UTLB_SIZE];      /* unified translation table */
 190
 191     uint32_t ldst;
 192
 193     /* Fields up to this point are cleared by a CPU reset */
 194     struct {} end_reset_fields;
 195
 196     CPU_COMMON
 197
 198     /* Fields from here on are preserved over CPU reset. */
 199     int id;                     /* CPU model */
 200
 201     /* The features that we should emulate. See sh_features above.  */
 202     uint32_t features;
 203
 204     void *intc_handle;
 205     int in_sleep;               /* SR_BL ignored during sleep */
 206     memory_content *movcal_backup;
 207     memory_content **movcal_backup_tail;
 208 } CPUSH4State;
 209
 210 /**
 211  * SuperHCPU:
 212  * @env: #CPUSH4State
 213  *
 214  * A SuperH CPU.
 215  */
 216 struct SuperHCPU {
 217     /*< private >*/
 218     CPUState parent_obj;
 219     /*< public >*/
 220
 221     CPUSH4State env;
 222 };
 223
 224 static inline SuperHCPU *sh_env_get_cpu(CPUSH4State *env)
 225 {
 226     return container_of(env, SuperHCPU, env);
 227 }
 228
 229 #define ENV_GET_CPU(e) CPU(sh_env_get_cpu(e))
 230
 231 #define ENV_OFFSET offsetof(SuperHCPU, env)
 232
 233 void superh_cpu_do_interrupt(CPUState *cpu);
 234 bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req);
 235 void superh_cpu_dump_state(CPUState *cpu, FILE *f,
 236                            fprintf_function cpu_fprintf, int flags);
 237 hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 238 int superh_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
 239 int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 240 void superh_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
 241                                     MMUAccessType access_type,
 242                                     int mmu_idx, uintptr_t retaddr);
 243
 244 void sh4_translate_init(void);
 245 int cpu_sh4_signal_handler(int host_signum, void *pinfo,
 246                            void *puc);
 247 int superh_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw,
 248                                 int mmu_idx);
 249
 250 void sh4_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 251 #if !defined(CONFIG_USER_ONLY)
 252 void cpu_sh4_invalidate_tlb(CPUSH4State *s);
 253 uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
 254                                        hwaddr addr);
 255 void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
 256                                     uint32_t mem_value);
 257 uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
 258                                        hwaddr addr);
 259 void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
 260                                     uint32_t mem_value);
 261 uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
 262                                        hwaddr addr);
 263 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
 264                                     uint32_t mem_value);
 265 uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
 266                                        hwaddr addr);
 267 void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
 268                                     uint32_t mem_value);
 269 #endif
 270
 271 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);
 272
 273 void cpu_load_tlb(CPUSH4State * env);
 274
 275 #define cpu_init(cpu_model) cpu_generic_init(TYPE_SUPERH_CPU, cpu_model)
 276
 277 #define cpu_signal_handler cpu_sh4_signal_handler
 278 #define cpu_list sh4_cpu_list
 279
 280 /* MMU modes definitions */
 281 #define MMU_MODE0_SUFFIX _kernel
 282 #define MMU_MODE1_SUFFIX _user
 283 #define MMU_USER_IDX 1
 284 static inline int cpu_mmu_index (CPUSH4State *env, bool ifetch)
 285 {
 286     /* The instruction in a RTE delay slot is fetched in privileged
 287        mode, but executed in user mode.  */
 288     if (ifetch && (env->flags & DELAY_SLOT_RTE)) {
 289         return 0;
 290     } else {
 291         return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0;
 292     }
 293 }
 294
 295 #include "exec/cpu-all.h"
 296
 297 /* Memory access type */
 298 enum {
 299     /* Privilege */
 300     ACCESS_PRIV = 0x01,
 301     /* Direction */
 302     ACCESS_WRITE = 0x02,
 303     /* Type of instruction */
 304     ACCESS_CODE = 0x10,
 305     ACCESS_INT = 0x20
 306 };
 307
 308 /* MMU control register */
 309 #define MMUCR    0x1F000010
 310 #define MMUCR_AT (1<<0)
 311 #define MMUCR_TI (1<<2)
 312 #define MMUCR_SV (1<<8)
 313 #define MMUCR_URC_BITS (6)
 314 #define MMUCR_URC_OFFSET (10)
 315 #define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS)
 316 #define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET)
 317 static inline int cpu_mmucr_urc (uint32_t mmucr)
 318 {
 319     return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET);
 320 }
 321
 322 /* PTEH : Page Translation Entry High register */
 323 #define PTEH_ASID_BITS (8)
 324 #define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS)
 325 #define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1)
 326 #define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK)
 327 #define PTEH_VPN_BITS (22)
 328 #define PTEH_VPN_OFFSET (10)
 329 #define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS)
 330 #define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET)
 331 static inline int cpu_pteh_vpn (uint32_t pteh)
 332 {
 333     return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET);
 334 }
 335
 336 /* PTEL : Page Translation Entry Low register */
 337 #define PTEL_V        (1 << 8)
 338 #define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8)
 339 #define PTEL_C        (1 << 3)
 340 #define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3)
 341 #define PTEL_D        (1 << 2)
 342 #define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2)
 343 #define PTEL_SH       (1 << 1)
 344 #define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1)
 345 #define PTEL_WT       (1 << 0)
 346 #define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT)
 347
 348 #define PTEL_SZ_HIGH_OFFSET  (7)
 349 #define PTEL_SZ_HIGH  (1 << PTEL_SZ_HIGH_OFFSET)
 350 #define PTEL_SZ_LOW_OFFSET   (4)
 351 #define PTEL_SZ_LOW   (1 << PTEL_SZ_LOW_OFFSET)
 352 static inline int cpu_ptel_sz (uint32_t ptel)
 353 {
 354     int sz;
 355     sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET;
 356     sz <<= 1;
 357     sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET;
 358     return sz;
 359 }
 360
 361 #define PTEL_PPN_BITS (19)
 362 #define PTEL_PPN_OFFSET (10)
 363 #define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS)
 364 #define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET)
 365 static inline int cpu_ptel_ppn (uint32_t ptel)
 366 {
 367     return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET);
 368 }
 369
 370 #define PTEL_PR_BITS   (2)
 371 #define PTEL_PR_OFFSET (5)
 372 #define PTEL_PR_SIZE (1 << PTEL_PR_BITS)
 373 #define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET)
 374 static inline int cpu_ptel_pr (uint32_t ptel)
 375 {
 376     return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET);
 377 }
 378
 379 /* PTEA : Page Translation Entry Assistance register */
 380 #define PTEA_SA_BITS (3)
 381 #define PTEA_SA_SIZE (1 << PTEA_SA_BITS)
 382 #define PTEA_SA_MASK (PTEA_SA_SIZE - 1)
 383 #define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK)
 384 #define PTEA_TC        (1 << 3)
 385 #define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3)
 386
 387 static inline target_ulong cpu_read_sr(CPUSH4State *env)
 388 {
 389     return env->sr | (env->sr_m << SR_M) |
 390                      (env->sr_q << SR_Q) |
 391                      (env->sr_t << SR_T);
 392 }
 393
 394 static inline void cpu_write_sr(CPUSH4State *env, target_ulong sr)
 395 {
 396     env->sr_m = (sr >> SR_M) & 1;
 397     env->sr_q = (sr >> SR_Q) & 1;
 398     env->sr_t = (sr >> SR_T) & 1;
 399     env->sr = sr & ~((1u << SR_M) | (1u << SR_Q) | (1u << SR_T));
 400 }
 401
 402 static inline void cpu_get_tb_cpu_state(CPUSH4State *env, target_ulong *pc,
 403                                         target_ulong *cs_base, uint32_t *flags)
 404 {
 405     *pc = env->pc;
 406     /* For a gUSA region, notice the end of the region.  */
 407     *cs_base = env->flags & GUSA_MASK ? env->gregs[0] : 0;
 408     *flags = env->flags /* TB_FLAG_ENVFLAGS_MASK: bits 0-2, 4-12 */
 409             | (env->fpscr & (FPSCR_FR | FPSCR_SZ | FPSCR_PR))  /* Bits 19-21 */
 410             | (env->sr & ((1u << SR_MD) | (1u << SR_RB)))      /* Bits 29-30 */
 411             | (env->sr & (1u << SR_FD))                        /* Bit 15 */
 412             | (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 3 */
 413 }
 414
 415 #endif /* SH4_CPU_H */