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