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 2.1 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 "cpu-qom.h"
  24 #include "exec/cpu-defs.h"
  25 #include "qemu/cpu-float.h"
  26
  27 /* CPU Subtypes */
  28 #define SH_CPU_SH7750  (1 << 0)
  29 #define SH_CPU_SH7750S (1 << 1)
  30 #define SH_CPU_SH7750R (1 << 2)
  31 #define SH_CPU_SH7751  (1 << 3)
  32 #define SH_CPU_SH7751R (1 << 4)
  33 #define SH_CPU_SH7785  (1 << 5)
  34 #define SH_CPU_SH7750_ALL (SH_CPU_SH7750 | SH_CPU_SH7750S | SH_CPU_SH7750R)
  35 #define SH_CPU_SH7751_ALL (SH_CPU_SH7751 | SH_CPU_SH7751R)
  36
  37 #define SR_MD 30
  38 #define SR_RB 29
  39 #define SR_BL 28
  40 #define SR_FD 15
  41 #define SR_M  9
  42 #define SR_Q  8
  43 #define SR_I3 7
  44 #define SR_I2 6
  45 #define SR_I1 5
  46 #define SR_I0 4
  47 #define SR_S  1
  48 #define SR_T  0
  49
  50 #define FPSCR_MASK             (0x003fffff)
  51 #define FPSCR_FR               (1 << 21)
  52 #define FPSCR_SZ               (1 << 20)
  53 #define FPSCR_PR               (1 << 19)
  54 #define FPSCR_DN               (1 << 18)
  55 #define FPSCR_CAUSE_MASK       (0x3f << 12)
  56 #define FPSCR_CAUSE_SHIFT      (12)
  57 #define FPSCR_CAUSE_E          (1 << 17)
  58 #define FPSCR_CAUSE_V          (1 << 16)
  59 #define FPSCR_CAUSE_Z          (1 << 15)
  60 #define FPSCR_CAUSE_O          (1 << 14)
  61 #define FPSCR_CAUSE_U          (1 << 13)
  62 #define FPSCR_CAUSE_I          (1 << 12)
  63 #define FPSCR_ENABLE_MASK      (0x1f << 7)
  64 #define FPSCR_ENABLE_SHIFT     (7)
  65 #define FPSCR_ENABLE_V         (1 << 11)
  66 #define FPSCR_ENABLE_Z         (1 << 10)
  67 #define FPSCR_ENABLE_O         (1 << 9)
  68 #define FPSCR_ENABLE_U         (1 << 8)
  69 #define FPSCR_ENABLE_I         (1 << 7)
  70 #define FPSCR_FLAG_MASK        (0x1f << 2)
  71 #define FPSCR_FLAG_SHIFT       (2)
  72 #define FPSCR_FLAG_V           (1 << 6)
  73 #define FPSCR_FLAG_Z           (1 << 5)
  74 #define FPSCR_FLAG_O           (1 << 4)
  75 #define FPSCR_FLAG_U           (1 << 3)
  76 #define FPSCR_FLAG_I           (1 << 2)
  77 #define FPSCR_RM_MASK          (0x03 << 0)
  78 #define FPSCR_RM_NEAREST       (0 << 0)
  79 #define FPSCR_RM_ZERO          (1 << 0)
  80
  81 #define TB_FLAG_DELAY_SLOT       (1 << 0)
  82 #define TB_FLAG_DELAY_SLOT_COND  (1 << 1)
  83 #define TB_FLAG_DELAY_SLOT_RTE   (1 << 2)
  84 #define TB_FLAG_PENDING_MOVCA    (1 << 3)
  85 #define TB_FLAG_GUSA_SHIFT       4                      /* [11:4] */
  86 #define TB_FLAG_GUSA_EXCLUSIVE   (1 << 12)
  87 #define TB_FLAG_UNALIGN          (1 << 13)
  88 #define TB_FLAG_SR_FD            (1 << SR_FD)           /* 15 */
  89 #define TB_FLAG_FPSCR_PR         FPSCR_PR               /* 19 */
  90 #define TB_FLAG_FPSCR_SZ         FPSCR_SZ               /* 20 */
  91 #define TB_FLAG_FPSCR_FR         FPSCR_FR               /* 21 */
  92 #define TB_FLAG_SR_RB            (1 << SR_RB)           /* 29 */
  93 #define TB_FLAG_SR_MD            (1 << SR_MD)           /* 30 */
  94
  95 #define TB_FLAG_DELAY_SLOT_MASK  (TB_FLAG_DELAY_SLOT |       \
  96                                   TB_FLAG_DELAY_SLOT_COND |  \
  97                                   TB_FLAG_DELAY_SLOT_RTE)
  98 #define TB_FLAG_GUSA_MASK        ((0xff << TB_FLAG_GUSA_SHIFT) | \
  99                                   TB_FLAG_GUSA_EXCLUSIVE)
 100 #define TB_FLAG_FPSCR_MASK       (TB_FLAG_FPSCR_PR | \
 101                                   TB_FLAG_FPSCR_SZ | \
 102                                   TB_FLAG_FPSCR_FR)
 103 #define TB_FLAG_SR_MASK          (TB_FLAG_SR_FD | \
 104                                   TB_FLAG_SR_RB | \
 105                                   TB_FLAG_SR_MD)
 106 #define TB_FLAG_ENVFLAGS_MASK    (TB_FLAG_DELAY_SLOT_MASK | \
 107                                   TB_FLAG_GUSA_MASK)
 108
 109 typedef struct tlb_t {
 110     uint32_t vpn;               /* virtual page number */
 111     uint32_t ppn;               /* physical page number */
 112     uint32_t size;              /* mapped page size in bytes */
 113     uint8_t asid;               /* address space identifier */
 114     uint8_t v:1;                /* validity */
 115     uint8_t sz:2;               /* page size */
 116     uint8_t sh:1;               /* share status */
 117     uint8_t c:1;                /* cacheability */
 118     uint8_t pr:2;               /* protection key */
 119     uint8_t d:1;                /* dirty */
 120     uint8_t wt:1;               /* write through */
 121     uint8_t sa:3;               /* space attribute (PCMCIA) */
 122     uint8_t tc:1;               /* timing control */
 123 } tlb_t;
 124
 125 #define UTLB_SIZE 64
 126 #define ITLB_SIZE 4
 127
 128 #define TARGET_INSN_START_EXTRA_WORDS 1
 129
 130 enum sh_features {
 131     SH_FEATURE_SH4A = 1,
 132     SH_FEATURE_BCR3_AND_BCR4 = 2,
 133 };
 134
 135 typedef struct memory_content {
 136     uint32_t address;
 137     uint32_t value;
 138     struct memory_content *next;
 139 } memory_content;
 140
 141 typedef struct CPUArchState {
 142     uint32_t flags;             /* general execution flags */
 143     uint32_t gregs[24];         /* general registers */
 144     float32 fregs[32];          /* floating point registers */
 145     uint32_t sr;                /* status register (with T split out) */
 146     uint32_t sr_m;              /* M bit of status register */
 147     uint32_t sr_q;              /* Q bit of status register */
 148     uint32_t sr_t;              /* T bit of status register */
 149     uint32_t ssr;               /* saved status register */
 150     uint32_t spc;               /* saved program counter */
 151     uint32_t gbr;               /* global base register */
 152     uint32_t vbr;               /* vector base register */
 153     uint32_t sgr;               /* saved global register 15 */
 154     uint32_t dbr;               /* debug base register */
 155     uint32_t pc;                /* program counter */
 156     uint32_t delayed_pc;        /* target of delayed branch */
 157     uint32_t delayed_cond;      /* condition of delayed branch */
 158     uint32_t mach;              /* multiply and accumulate high */
 159     uint32_t macl;              /* multiply and accumulate low */
 160     uint32_t pr;                /* procedure register */
 161     uint32_t fpscr;             /* floating point status/control register */
 162     uint32_t fpul;              /* floating point communication register */
 163
 164     /* float point status register */
 165     float_status fp_status;
 166
 167     /* Those belong to the specific unit (SH7750) but are handled here */
 168     uint32_t mmucr;             /* MMU control register */
 169     uint32_t pteh;              /* page table entry high register */
 170     uint32_t ptel;              /* page table entry low register */
 171     uint32_t ptea;              /* page table entry assistance register */
 172     uint32_t ttb;               /* translation table base register */
 173     uint32_t tea;               /* TLB exception address register */
 174     uint32_t tra;               /* TRAPA exception register */
 175     uint32_t expevt;            /* exception event register */
 176     uint32_t intevt;            /* interrupt event register */
 177
 178     tlb_t itlb[ITLB_SIZE];      /* instruction translation table */
 179     tlb_t utlb[UTLB_SIZE];      /* unified translation table */
 180
 181     /* LDST = LOCK_ADDR != -1.  */
 182     uint32_t lock_addr;
 183     uint32_t lock_value;
 184
 185     /* Fields up to this point are cleared by a CPU reset */
 186     struct {} end_reset_fields;
 187
 188     /* Fields from here on are preserved over CPU reset. */
 189     int id;                     /* CPU model */
 190
 191     /* The features that we should emulate. See sh_features above.  */
 192     uint32_t features;
 193
 194     void *intc_handle;
 195     int in_sleep;               /* SR_BL ignored during sleep */
 196     memory_content *movcal_backup;
 197     memory_content **movcal_backup_tail;
 198 } CPUSH4State;
 199
 200 /**
 201  * SuperHCPU:
 202  * @env: #CPUSH4State
 203  *
 204  * A SuperH CPU.
 205  */
 206 struct ArchCPU {
 207     /*< private >*/
 208     CPUState parent_obj;
 209     /*< public >*/
 210
 211     CPUNegativeOffsetState neg;
 212     CPUSH4State env;
 213 };
 214
 215
 216 void superh_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
 217 int superh_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
 218 int superh_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
 219 G_NORETURN void superh_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
 220                                                MMUAccessType access_type, int mmu_idx,
 221                                                uintptr_t retaddr);
 222
 223 void sh4_translate_init(void);
 224 void sh4_cpu_list(void);
 225
 226 #if !defined(CONFIG_USER_ONLY)
 227 hwaddr superh_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
 228 bool superh_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 229                          MMUAccessType access_type, int mmu_idx,
 230                          bool probe, uintptr_t retaddr);
 231 void superh_cpu_do_interrupt(CPUState *cpu);
 232 bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req);
 233 void cpu_sh4_invalidate_tlb(CPUSH4State *s);
 234 uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
 235                                        hwaddr addr);
 236 void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
 237                                     uint32_t mem_value);
 238 uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
 239                                        hwaddr addr);
 240 void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
 241                                     uint32_t mem_value);
 242 uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
 243                                        hwaddr addr);
 244 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
 245                                     uint32_t mem_value);
 246 uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
 247                                        hwaddr addr);
 248 void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
 249                                     uint32_t mem_value);
 250 #endif
 251
 252 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr);
 253
 254 void cpu_load_tlb(CPUSH4State * env);
 255
 256 #define SUPERH_CPU_TYPE_SUFFIX "-" TYPE_SUPERH_CPU
 257 #define SUPERH_CPU_TYPE_NAME(model) model SUPERH_CPU_TYPE_SUFFIX
 258 #define CPU_RESOLVING_TYPE TYPE_SUPERH_CPU
 259
 260 #define cpu_list sh4_cpu_list
 261
 262 /* MMU modes definitions */
 263 #define MMU_USER_IDX 1
 264 static inline int cpu_mmu_index (CPUSH4State *env, bool ifetch)
 265 {
 266     /* The instruction in a RTE delay slot is fetched in privileged
 267        mode, but executed in user mode.  */
 268     if (ifetch && (env->flags & TB_FLAG_DELAY_SLOT_RTE)) {
 269         return 0;
 270     } else {
 271         return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0;
 272     }
 273 }
 274
 275 #include "exec/cpu-all.h"
 276
 277 /* MMU control register */
 278 #define MMUCR    0x1F000010
 279 #define MMUCR_AT (1<<0)
 280 #define MMUCR_TI (1<<2)
 281 #define MMUCR_SV (1<<8)
 282 #define MMUCR_URC_BITS (6)
 283 #define MMUCR_URC_OFFSET (10)
 284 #define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS)
 285 #define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET)
 286 static inline int cpu_mmucr_urc (uint32_t mmucr)
 287 {
 288     return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET);
 289 }
 290
 291 /* PTEH : Page Translation Entry High register */
 292 #define PTEH_ASID_BITS (8)
 293 #define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS)
 294 #define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1)
 295 #define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK)
 296 #define PTEH_VPN_BITS (22)
 297 #define PTEH_VPN_OFFSET (10)
 298 #define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS)
 299 #define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET)
 300 static inline int cpu_pteh_vpn (uint32_t pteh)
 301 {
 302     return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET);
 303 }
 304
 305 /* PTEL : Page Translation Entry Low register */
 306 #define PTEL_V        (1 << 8)
 307 #define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8)
 308 #define PTEL_C        (1 << 3)
 309 #define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3)
 310 #define PTEL_D        (1 << 2)
 311 #define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2)
 312 #define PTEL_SH       (1 << 1)
 313 #define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1)
 314 #define PTEL_WT       (1 << 0)
 315 #define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT)
 316
 317 #define PTEL_SZ_HIGH_OFFSET  (7)
 318 #define PTEL_SZ_HIGH  (1 << PTEL_SZ_HIGH_OFFSET)
 319 #define PTEL_SZ_LOW_OFFSET   (4)
 320 #define PTEL_SZ_LOW   (1 << PTEL_SZ_LOW_OFFSET)
 321 static inline int cpu_ptel_sz (uint32_t ptel)
 322 {
 323     int sz;
 324     sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET;
 325     sz <<= 1;
 326     sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET;
 327     return sz;
 328 }
 329
 330 #define PTEL_PPN_BITS (19)
 331 #define PTEL_PPN_OFFSET (10)
 332 #define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS)
 333 #define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET)
 334 static inline int cpu_ptel_ppn (uint32_t ptel)
 335 {
 336     return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET);
 337 }
 338
 339 #define PTEL_PR_BITS   (2)
 340 #define PTEL_PR_OFFSET (5)
 341 #define PTEL_PR_SIZE (1 << PTEL_PR_BITS)
 342 #define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET)
 343 static inline int cpu_ptel_pr (uint32_t ptel)
 344 {
 345     return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET);
 346 }
 347
 348 /* PTEA : Page Translation Entry Assistance register */
 349 #define PTEA_SA_BITS (3)
 350 #define PTEA_SA_SIZE (1 << PTEA_SA_BITS)
 351 #define PTEA_SA_MASK (PTEA_SA_SIZE - 1)
 352 #define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK)
 353 #define PTEA_TC        (1 << 3)
 354 #define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3)
 355
 356 static inline target_ulong cpu_read_sr(CPUSH4State *env)
 357 {
 358     return env->sr | (env->sr_m << SR_M) |
 359                      (env->sr_q << SR_Q) |
 360                      (env->sr_t << SR_T);
 361 }
 362
 363 static inline void cpu_write_sr(CPUSH4State *env, target_ulong sr)
 364 {
 365     env->sr_m = (sr >> SR_M) & 1;
 366     env->sr_q = (sr >> SR_Q) & 1;
 367     env->sr_t = (sr >> SR_T) & 1;
 368     env->sr = sr & ~((1u << SR_M) | (1u << SR_Q) | (1u << SR_T));
 369 }
 370
 371 static inline void cpu_get_tb_cpu_state(CPUSH4State *env, target_ulong *pc,
 372                                         target_ulong *cs_base, uint32_t *flags)
 373 {
 374     *pc = env->pc;
 375     /* For a gUSA region, notice the end of the region.  */
 376     *cs_base = env->flags & TB_FLAG_GUSA_MASK ? env->gregs[0] : 0;
 377     *flags = env->flags
 378             | (env->fpscr & TB_FLAG_FPSCR_MASK)
 379             | (env->sr & TB_FLAG_SR_MASK)
 380             | (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 3 */
 381 #ifdef CONFIG_USER_ONLY
 382     *flags |= TB_FLAG_UNALIGN * !env_cpu(env)->prctl_unalign_sigbus;
 383 #endif
 384 }
 385
 386 #endif /* SH4_CPU_H */