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 DELAY_SLOT_MASK 0x7 82 #define DELAY_SLOT (1 << 0) 83 #define DELAY_SLOT_CONDITIONAL (1 << 1) 84 #define DELAY_SLOT_RTE (1 << 2) 85 86 #define TB_FLAG_PENDING_MOVCA (1 << 3) 87 #define TB_FLAG_UNALIGN (1 << 4) 88 89 #define GUSA_SHIFT 4 90 #ifdef CONFIG_USER_ONLY 91 #define GUSA_EXCLUSIVE (1 << 12) 92 #define GUSA_MASK ((0xff << GUSA_SHIFT) | GUSA_EXCLUSIVE) 93 #else 94 /* Provide dummy versions of the above to allow tests against tbflags 95 to be elided while avoiding ifdefs. */ 96 #define GUSA_EXCLUSIVE 0 97 #define GUSA_MASK 0 98 #endif 99 100 #define TB_FLAG_ENVFLAGS_MASK (DELAY_SLOT_MASK | GUSA_MASK) 101 102 typedef struct tlb_t { 103 uint32_t vpn; /* virtual page number */ 104 uint32_t ppn; /* physical page number */ 105 uint32_t size; /* mapped page size in bytes */ 106 uint8_t asid; /* address space identifier */ 107 uint8_t v:1; /* validity */ 108 uint8_t sz:2; /* page size */ 109 uint8_t sh:1; /* share status */ 110 uint8_t c:1; /* cacheability */ 111 uint8_t pr:2; /* protection key */ 112 uint8_t d:1; /* dirty */ 113 uint8_t wt:1; /* write through */ 114 uint8_t sa:3; /* space attribute (PCMCIA) */ 115 uint8_t tc:1; /* timing control */ 116 } tlb_t; 117 118 #define UTLB_SIZE 64 119 #define ITLB_SIZE 4 120 121 #define TARGET_INSN_START_EXTRA_WORDS 1 122 123 enum sh_features { 124 SH_FEATURE_SH4A = 1, 125 SH_FEATURE_BCR3_AND_BCR4 = 2, 126 }; 127 128 typedef struct memory_content { 129 uint32_t address; 130 uint32_t value; 131 struct memory_content *next; 132 } memory_content; 133 134 typedef struct CPUArchState { 135 uint32_t flags; /* general execution flags */ 136 uint32_t gregs[24]; /* general registers */ 137 float32 fregs[32]; /* floating point registers */ 138 uint32_t sr; /* status register (with T split out) */ 139 uint32_t sr_m; /* M bit of status register */ 140 uint32_t sr_q; /* Q bit of status register */ 141 uint32_t sr_t; /* T bit of status register */ 142 uint32_t ssr; /* saved status register */ 143 uint32_t spc; /* saved program counter */ 144 uint32_t gbr; /* global base register */ 145 uint32_t vbr; /* vector base register */ 146 uint32_t sgr; /* saved global register 15 */ 147 uint32_t dbr; /* debug base register */ 148 uint32_t pc; /* program counter */ 149 uint32_t delayed_pc; /* target of delayed branch */ 150 uint32_t delayed_cond; /* condition of delayed branch */ 151 uint32_t mach; /* multiply and accumulate high */ 152 uint32_t macl; /* multiply and accumulate low */ 153 uint32_t pr; /* procedure register */ 154 uint32_t fpscr; /* floating point status/control register */ 155 uint32_t fpul; /* floating point communication register */ 156 157 /* float point status register */ 158 float_status fp_status; 159 160 /* Those belong to the specific unit (SH7750) but are handled here */ 161 uint32_t mmucr; /* MMU control register */ 162 uint32_t pteh; /* page table entry high register */ 163 uint32_t ptel; /* page table entry low register */ 164 uint32_t ptea; /* page table entry assistance register */ 165 uint32_t ttb; /* translation table base register */ 166 uint32_t tea; /* TLB exception address register */ 167 uint32_t tra; /* TRAPA exception register */ 168 uint32_t expevt; /* exception event register */ 169 uint32_t intevt; /* interrupt event register */ 170 171 tlb_t itlb[ITLB_SIZE]; /* instruction translation table */ 172 tlb_t utlb[UTLB_SIZE]; /* unified translation table */ 173 174 /* LDST = LOCK_ADDR != -1. */ 175 uint32_t lock_addr; 176 uint32_t lock_value; 177 178 /* Fields up to this point are cleared by a CPU reset */ 179 struct {} end_reset_fields; 180 181 /* Fields from here on are preserved over CPU reset. */ 182 int id; /* CPU model */ 183 184 /* The features that we should emulate. See sh_features above. */ 185 uint32_t features; 186 187 void *intc_handle; 188 int in_sleep; /* SR_BL ignored during sleep */ 189 memory_content *movcal_backup; 190 memory_content **movcal_backup_tail; 191 } CPUSH4State; 192 193 /** 194 * SuperHCPU: 195 * @env: #CPUSH4State 196 * 197 * A SuperH CPU. 198 */ 199 struct ArchCPU { 200 /*< private >*/ 201 CPUState parent_obj; 202 /*< public >*/ 203 204 CPUNegativeOffsetState neg; 205 CPUSH4State env; 206 }; 207 208 209 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, int mmu_idx, 215 uintptr_t retaddr) QEMU_NORETURN; 216 217 void sh4_translate_init(void); 218 void sh4_cpu_list(void); 219 220 #if !defined(CONFIG_USER_ONLY) 221 bool superh_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 222 MMUAccessType access_type, int mmu_idx, 223 bool probe, uintptr_t retaddr); 224 void superh_cpu_do_interrupt(CPUState *cpu); 225 bool superh_cpu_exec_interrupt(CPUState *cpu, int int_req); 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_list sh4_cpu_list 254 255 /* MMU modes definitions */ 256 #define MMU_USER_IDX 1 257 static inline int cpu_mmu_index (CPUSH4State *env, bool ifetch) 258 { 259 /* The instruction in a RTE delay slot is fetched in privileged 260 mode, but executed in user mode. */ 261 if (ifetch && (env->flags & DELAY_SLOT_RTE)) { 262 return 0; 263 } else { 264 return (env->sr & (1u << SR_MD)) == 0 ? 1 : 0; 265 } 266 } 267 268 #include "exec/cpu-all.h" 269 270 /* MMU control register */ 271 #define MMUCR 0x1F000010 272 #define MMUCR_AT (1<<0) 273 #define MMUCR_TI (1<<2) 274 #define MMUCR_SV (1<<8) 275 #define MMUCR_URC_BITS (6) 276 #define MMUCR_URC_OFFSET (10) 277 #define MMUCR_URC_SIZE (1 << MMUCR_URC_BITS) 278 #define MMUCR_URC_MASK (((MMUCR_URC_SIZE) - 1) << MMUCR_URC_OFFSET) 279 static inline int cpu_mmucr_urc (uint32_t mmucr) 280 { 281 return ((mmucr & MMUCR_URC_MASK) >> MMUCR_URC_OFFSET); 282 } 283 284 /* PTEH : Page Translation Entry High register */ 285 #define PTEH_ASID_BITS (8) 286 #define PTEH_ASID_SIZE (1 << PTEH_ASID_BITS) 287 #define PTEH_ASID_MASK (PTEH_ASID_SIZE - 1) 288 #define cpu_pteh_asid(pteh) ((pteh) & PTEH_ASID_MASK) 289 #define PTEH_VPN_BITS (22) 290 #define PTEH_VPN_OFFSET (10) 291 #define PTEH_VPN_SIZE (1 << PTEH_VPN_BITS) 292 #define PTEH_VPN_MASK (((PTEH_VPN_SIZE) - 1) << PTEH_VPN_OFFSET) 293 static inline int cpu_pteh_vpn (uint32_t pteh) 294 { 295 return ((pteh & PTEH_VPN_MASK) >> PTEH_VPN_OFFSET); 296 } 297 298 /* PTEL : Page Translation Entry Low register */ 299 #define PTEL_V (1 << 8) 300 #define cpu_ptel_v(ptel) (((ptel) & PTEL_V) >> 8) 301 #define PTEL_C (1 << 3) 302 #define cpu_ptel_c(ptel) (((ptel) & PTEL_C) >> 3) 303 #define PTEL_D (1 << 2) 304 #define cpu_ptel_d(ptel) (((ptel) & PTEL_D) >> 2) 305 #define PTEL_SH (1 << 1) 306 #define cpu_ptel_sh(ptel)(((ptel) & PTEL_SH) >> 1) 307 #define PTEL_WT (1 << 0) 308 #define cpu_ptel_wt(ptel) ((ptel) & PTEL_WT) 309 310 #define PTEL_SZ_HIGH_OFFSET (7) 311 #define PTEL_SZ_HIGH (1 << PTEL_SZ_HIGH_OFFSET) 312 #define PTEL_SZ_LOW_OFFSET (4) 313 #define PTEL_SZ_LOW (1 << PTEL_SZ_LOW_OFFSET) 314 static inline int cpu_ptel_sz (uint32_t ptel) 315 { 316 int sz; 317 sz = (ptel & PTEL_SZ_HIGH) >> PTEL_SZ_HIGH_OFFSET; 318 sz <<= 1; 319 sz |= (ptel & PTEL_SZ_LOW) >> PTEL_SZ_LOW_OFFSET; 320 return sz; 321 } 322 323 #define PTEL_PPN_BITS (19) 324 #define PTEL_PPN_OFFSET (10) 325 #define PTEL_PPN_SIZE (1 << PTEL_PPN_BITS) 326 #define PTEL_PPN_MASK (((PTEL_PPN_SIZE) - 1) << PTEL_PPN_OFFSET) 327 static inline int cpu_ptel_ppn (uint32_t ptel) 328 { 329 return ((ptel & PTEL_PPN_MASK) >> PTEL_PPN_OFFSET); 330 } 331 332 #define PTEL_PR_BITS (2) 333 #define PTEL_PR_OFFSET (5) 334 #define PTEL_PR_SIZE (1 << PTEL_PR_BITS) 335 #define PTEL_PR_MASK (((PTEL_PR_SIZE) - 1) << PTEL_PR_OFFSET) 336 static inline int cpu_ptel_pr (uint32_t ptel) 337 { 338 return ((ptel & PTEL_PR_MASK) >> PTEL_PR_OFFSET); 339 } 340 341 /* PTEA : Page Translation Entry Assistance register */ 342 #define PTEA_SA_BITS (3) 343 #define PTEA_SA_SIZE (1 << PTEA_SA_BITS) 344 #define PTEA_SA_MASK (PTEA_SA_SIZE - 1) 345 #define cpu_ptea_sa(ptea) ((ptea) & PTEA_SA_MASK) 346 #define PTEA_TC (1 << 3) 347 #define cpu_ptea_tc(ptea) (((ptea) & PTEA_TC) >> 3) 348 349 static inline target_ulong cpu_read_sr(CPUSH4State *env) 350 { 351 return env->sr | (env->sr_m << SR_M) | 352 (env->sr_q << SR_Q) | 353 (env->sr_t << SR_T); 354 } 355 356 static inline void cpu_write_sr(CPUSH4State *env, target_ulong sr) 357 { 358 env->sr_m = (sr >> SR_M) & 1; 359 env->sr_q = (sr >> SR_Q) & 1; 360 env->sr_t = (sr >> SR_T) & 1; 361 env->sr = sr & ~((1u << SR_M) | (1u << SR_Q) | (1u << SR_T)); 362 } 363 364 static inline void cpu_get_tb_cpu_state(CPUSH4State *env, target_ulong *pc, 365 target_ulong *cs_base, uint32_t *flags) 366 { 367 *pc = env->pc; 368 /* For a gUSA region, notice the end of the region. */ 369 *cs_base = env->flags & GUSA_MASK ? env->gregs[0] : 0; 370 *flags = env->flags /* TB_FLAG_ENVFLAGS_MASK: bits 0-2, 4-12 */ 371 | (env->fpscr & (FPSCR_FR | FPSCR_SZ | FPSCR_PR)) /* Bits 19-21 */ 372 | (env->sr & ((1u << SR_MD) | (1u << SR_RB))) /* Bits 29-30 */ 373 | (env->sr & (1u << SR_FD)) /* Bit 15 */ 374 | (env->movcal_backup ? TB_FLAG_PENDING_MOVCA : 0); /* Bit 3 */ 375 #ifdef CONFIG_USER_ONLY 376 *flags |= TB_FLAG_UNALIGN * !env_cpu(env)->prctl_unalign_sigbus; 377 #endif 378 } 379 380 #endif /* SH4_CPU_H */ 381