1 /* mips internal definitions and helpers 2 * 3 * This work is licensed under the terms of the GNU GPL, version 2 or later. 4 * See the COPYING file in the top-level directory. 5 */ 6 7 #ifndef MIPS_INTERNAL_H 8 #define MIPS_INTERNAL_H 9 10 11 /* MMU types, the first four entries have the same layout as the 12 CP0C0_MT field. */ 13 enum mips_mmu_types { 14 MMU_TYPE_NONE, 15 MMU_TYPE_R4000, 16 MMU_TYPE_RESERVED, 17 MMU_TYPE_FMT, 18 MMU_TYPE_R3000, 19 MMU_TYPE_R6000, 20 MMU_TYPE_R8000 21 }; 22 23 struct mips_def_t { 24 const char *name; 25 int32_t CP0_PRid; 26 int32_t CP0_Config0; 27 int32_t CP0_Config1; 28 int32_t CP0_Config2; 29 int32_t CP0_Config3; 30 int32_t CP0_Config4; 31 int32_t CP0_Config4_rw_bitmask; 32 int32_t CP0_Config5; 33 int32_t CP0_Config5_rw_bitmask; 34 int32_t CP0_Config6; 35 int32_t CP0_Config7; 36 target_ulong CP0_LLAddr_rw_bitmask; 37 int CP0_LLAddr_shift; 38 int32_t SYNCI_Step; 39 int32_t CCRes; 40 int32_t CP0_Status_rw_bitmask; 41 int32_t CP0_TCStatus_rw_bitmask; 42 int32_t CP0_SRSCtl; 43 int32_t CP1_fcr0; 44 int32_t CP1_fcr31_rw_bitmask; 45 int32_t CP1_fcr31; 46 int32_t MSAIR; 47 int32_t SEGBITS; 48 int32_t PABITS; 49 int32_t CP0_SRSConf0_rw_bitmask; 50 int32_t CP0_SRSConf0; 51 int32_t CP0_SRSConf1_rw_bitmask; 52 int32_t CP0_SRSConf1; 53 int32_t CP0_SRSConf2_rw_bitmask; 54 int32_t CP0_SRSConf2; 55 int32_t CP0_SRSConf3_rw_bitmask; 56 int32_t CP0_SRSConf3; 57 int32_t CP0_SRSConf4_rw_bitmask; 58 int32_t CP0_SRSConf4; 59 int32_t CP0_PageGrain_rw_bitmask; 60 int32_t CP0_PageGrain; 61 target_ulong CP0_EBaseWG_rw_bitmask; 62 int insn_flags; 63 enum mips_mmu_types mmu_type; 64 }; 65 66 extern const struct mips_def_t mips_defs[]; 67 extern const int mips_defs_number; 68 69 enum CPUMIPSMSADataFormat { 70 DF_BYTE = 0, 71 DF_HALF, 72 DF_WORD, 73 DF_DOUBLE 74 }; 75 76 void mips_cpu_do_interrupt(CPUState *cpu); 77 bool mips_cpu_exec_interrupt(CPUState *cpu, int int_req); 78 void mips_cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf, 79 int flags); 80 hwaddr mips_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); 81 int mips_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); 82 int mips_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); 83 void mips_cpu_do_unaligned_access(CPUState *cpu, vaddr addr, 84 MMUAccessType access_type, 85 int mmu_idx, uintptr_t retaddr); 86 87 #if !defined(CONFIG_USER_ONLY) 88 89 typedef struct r4k_tlb_t r4k_tlb_t; 90 struct r4k_tlb_t { 91 target_ulong VPN; 92 uint32_t PageMask; 93 uint16_t ASID; 94 unsigned int G:1; 95 unsigned int C0:3; 96 unsigned int C1:3; 97 unsigned int V0:1; 98 unsigned int V1:1; 99 unsigned int D0:1; 100 unsigned int D1:1; 101 unsigned int XI0:1; 102 unsigned int XI1:1; 103 unsigned int RI0:1; 104 unsigned int RI1:1; 105 unsigned int EHINV:1; 106 uint64_t PFN[2]; 107 }; 108 109 struct CPUMIPSTLBContext { 110 uint32_t nb_tlb; 111 uint32_t tlb_in_use; 112 int (*map_address)(struct CPUMIPSState *env, hwaddr *physical, int *prot, 113 target_ulong address, int rw, int access_type); 114 void (*helper_tlbwi)(struct CPUMIPSState *env); 115 void (*helper_tlbwr)(struct CPUMIPSState *env); 116 void (*helper_tlbp)(struct CPUMIPSState *env); 117 void (*helper_tlbr)(struct CPUMIPSState *env); 118 void (*helper_tlbinv)(struct CPUMIPSState *env); 119 void (*helper_tlbinvf)(struct CPUMIPSState *env); 120 union { 121 struct { 122 r4k_tlb_t tlb[MIPS_TLB_MAX]; 123 } r4k; 124 } mmu; 125 }; 126 127 int no_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot, 128 target_ulong address, int rw, int access_type); 129 int fixed_mmu_map_address(CPUMIPSState *env, hwaddr *physical, int *prot, 130 target_ulong address, int rw, int access_type); 131 int r4k_map_address(CPUMIPSState *env, hwaddr *physical, int *prot, 132 target_ulong address, int rw, int access_type); 133 void r4k_helper_tlbwi(CPUMIPSState *env); 134 void r4k_helper_tlbwr(CPUMIPSState *env); 135 void r4k_helper_tlbp(CPUMIPSState *env); 136 void r4k_helper_tlbr(CPUMIPSState *env); 137 void r4k_helper_tlbinv(CPUMIPSState *env); 138 void r4k_helper_tlbinvf(CPUMIPSState *env); 139 void r4k_invalidate_tlb(CPUMIPSState *env, int idx, int use_extra); 140 141 void mips_cpu_unassigned_access(CPUState *cpu, hwaddr addr, 142 bool is_write, bool is_exec, int unused, 143 unsigned size); 144 hwaddr cpu_mips_translate_address(CPUMIPSState *env, target_ulong address, 145 int rw); 146 #endif 147 148 #define cpu_signal_handler cpu_mips_signal_handler 149 150 #ifndef CONFIG_USER_ONLY 151 extern const struct VMStateDescription vmstate_mips_cpu; 152 #endif 153 154 static inline bool cpu_mips_hw_interrupts_enabled(CPUMIPSState *env) 155 { 156 return (env->CP0_Status & (1 << CP0St_IE)) && 157 !(env->CP0_Status & (1 << CP0St_EXL)) && 158 !(env->CP0_Status & (1 << CP0St_ERL)) && 159 !(env->hflags & MIPS_HFLAG_DM) && 160 /* Note that the TCStatus IXMT field is initialized to zero, 161 and only MT capable cores can set it to one. So we don't 162 need to check for MT capabilities here. */ 163 !(env->active_tc.CP0_TCStatus & (1 << CP0TCSt_IXMT)); 164 } 165 166 /* Check if there is pending and not masked out interrupt */ 167 static inline bool cpu_mips_hw_interrupts_pending(CPUMIPSState *env) 168 { 169 int32_t pending; 170 int32_t status; 171 bool r; 172 173 pending = env->CP0_Cause & CP0Ca_IP_mask; 174 status = env->CP0_Status & CP0Ca_IP_mask; 175 176 if (env->CP0_Config3 & (1 << CP0C3_VEIC)) { 177 /* A MIPS configured with a vectorizing external interrupt controller 178 will feed a vector into the Cause pending lines. The core treats 179 the status lines as a vector level, not as indiviual masks. */ 180 r = pending > status; 181 } else { 182 /* A MIPS configured with compatibility or VInt (Vectored Interrupts) 183 treats the pending lines as individual interrupt lines, the status 184 lines are individual masks. */ 185 r = (pending & status) != 0; 186 } 187 return r; 188 } 189 190 void mips_tcg_init(void); 191 192 /* TODO QOM'ify CPU reset and remove */ 193 void cpu_state_reset(CPUMIPSState *s); 194 void cpu_mips_realize_env(CPUMIPSState *env); 195 196 /* cp0_timer.c */ 197 uint32_t cpu_mips_get_random(CPUMIPSState *env); 198 uint32_t cpu_mips_get_count(CPUMIPSState *env); 199 void cpu_mips_store_count(CPUMIPSState *env, uint32_t value); 200 void cpu_mips_store_compare(CPUMIPSState *env, uint32_t value); 201 void cpu_mips_start_count(CPUMIPSState *env); 202 void cpu_mips_stop_count(CPUMIPSState *env); 203 204 /* helper.c */ 205 int mips_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int size, int rw, 206 int mmu_idx); 207 208 /* op_helper.c */ 209 uint32_t float_class_s(uint32_t arg, float_status *fst); 210 uint64_t float_class_d(uint64_t arg, float_status *fst); 211 212 extern unsigned int ieee_rm[]; 213 int ieee_ex_to_mips(int xcpt); 214 215 static inline void restore_rounding_mode(CPUMIPSState *env) 216 { 217 set_float_rounding_mode(ieee_rm[env->active_fpu.fcr31 & 3], 218 &env->active_fpu.fp_status); 219 } 220 221 static inline void restore_flush_mode(CPUMIPSState *env) 222 { 223 set_flush_to_zero((env->active_fpu.fcr31 & (1 << FCR31_FS)) != 0, 224 &env->active_fpu.fp_status); 225 } 226 227 static inline void restore_fp_status(CPUMIPSState *env) 228 { 229 restore_rounding_mode(env); 230 restore_flush_mode(env); 231 restore_snan_bit_mode(env); 232 } 233 234 static inline void restore_msa_fp_status(CPUMIPSState *env) 235 { 236 float_status *status = &env->active_tc.msa_fp_status; 237 int rounding_mode = (env->active_tc.msacsr & MSACSR_RM_MASK) >> MSACSR_RM; 238 bool flush_to_zero = (env->active_tc.msacsr & MSACSR_FS_MASK) != 0; 239 240 set_float_rounding_mode(ieee_rm[rounding_mode], status); 241 set_flush_to_zero(flush_to_zero, status); 242 set_flush_inputs_to_zero(flush_to_zero, status); 243 } 244 245 static inline void restore_pamask(CPUMIPSState *env) 246 { 247 if (env->hflags & MIPS_HFLAG_ELPA) { 248 env->PAMask = (1ULL << env->PABITS) - 1; 249 } else { 250 env->PAMask = PAMASK_BASE; 251 } 252 } 253 254 static inline int mips_vpe_active(CPUMIPSState *env) 255 { 256 int active = 1; 257 258 /* Check that the VPE is enabled. */ 259 if (!(env->mvp->CP0_MVPControl & (1 << CP0MVPCo_EVP))) { 260 active = 0; 261 } 262 /* Check that the VPE is activated. */ 263 if (!(env->CP0_VPEConf0 & (1 << CP0VPEC0_VPA))) { 264 active = 0; 265 } 266 267 /* Now verify that there are active thread contexts in the VPE. 268 269 This assumes the CPU model will internally reschedule threads 270 if the active one goes to sleep. If there are no threads available 271 the active one will be in a sleeping state, and we can turn off 272 the entire VPE. */ 273 if (!(env->active_tc.CP0_TCStatus & (1 << CP0TCSt_A))) { 274 /* TC is not activated. */ 275 active = 0; 276 } 277 if (env->active_tc.CP0_TCHalt & 1) { 278 /* TC is in halt state. */ 279 active = 0; 280 } 281 282 return active; 283 } 284 285 static inline int mips_vp_active(CPUMIPSState *env) 286 { 287 CPUState *other_cs = first_cpu; 288 289 /* Check if the VP disabled other VPs (which means the VP is enabled) */ 290 if ((env->CP0_VPControl >> CP0VPCtl_DIS) & 1) { 291 return 1; 292 } 293 294 /* Check if the virtual processor is disabled due to a DVP */ 295 CPU_FOREACH(other_cs) { 296 MIPSCPU *other_cpu = MIPS_CPU(other_cs); 297 if ((&other_cpu->env != env) && 298 ((other_cpu->env.CP0_VPControl >> CP0VPCtl_DIS) & 1)) { 299 return 0; 300 } 301 } 302 return 1; 303 } 304 305 static inline void compute_hflags(CPUMIPSState *env) 306 { 307 env->hflags &= ~(MIPS_HFLAG_COP1X | MIPS_HFLAG_64 | MIPS_HFLAG_CP0 | 308 MIPS_HFLAG_F64 | MIPS_HFLAG_FPU | MIPS_HFLAG_KSU | 309 MIPS_HFLAG_AWRAP | MIPS_HFLAG_DSP | MIPS_HFLAG_DSPR2 | 310 MIPS_HFLAG_SBRI | MIPS_HFLAG_MSA | MIPS_HFLAG_FRE | 311 MIPS_HFLAG_ELPA | MIPS_HFLAG_ERL); 312 if (env->CP0_Status & (1 << CP0St_ERL)) { 313 env->hflags |= MIPS_HFLAG_ERL; 314 } 315 if (!(env->CP0_Status & (1 << CP0St_EXL)) && 316 !(env->CP0_Status & (1 << CP0St_ERL)) && 317 !(env->hflags & MIPS_HFLAG_DM)) { 318 env->hflags |= (env->CP0_Status >> CP0St_KSU) & MIPS_HFLAG_KSU; 319 } 320 #if defined(TARGET_MIPS64) 321 if ((env->insn_flags & ISA_MIPS3) && 322 (((env->hflags & MIPS_HFLAG_KSU) != MIPS_HFLAG_UM) || 323 (env->CP0_Status & (1 << CP0St_PX)) || 324 (env->CP0_Status & (1 << CP0St_UX)))) { 325 env->hflags |= MIPS_HFLAG_64; 326 } 327 328 if (!(env->insn_flags & ISA_MIPS3)) { 329 env->hflags |= MIPS_HFLAG_AWRAP; 330 } else if (((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_UM) && 331 !(env->CP0_Status & (1 << CP0St_UX))) { 332 env->hflags |= MIPS_HFLAG_AWRAP; 333 } else if (env->insn_flags & ISA_MIPS64R6) { 334 /* Address wrapping for Supervisor and Kernel is specified in R6 */ 335 if ((((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_SM) && 336 !(env->CP0_Status & (1 << CP0St_SX))) || 337 (((env->hflags & MIPS_HFLAG_KSU) == MIPS_HFLAG_KM) && 338 !(env->CP0_Status & (1 << CP0St_KX)))) { 339 env->hflags |= MIPS_HFLAG_AWRAP; 340 } 341 } 342 #endif 343 if (((env->CP0_Status & (1 << CP0St_CU0)) && 344 !(env->insn_flags & ISA_MIPS32R6)) || 345 !(env->hflags & MIPS_HFLAG_KSU)) { 346 env->hflags |= MIPS_HFLAG_CP0; 347 } 348 if (env->CP0_Status & (1 << CP0St_CU1)) { 349 env->hflags |= MIPS_HFLAG_FPU; 350 } 351 if (env->CP0_Status & (1 << CP0St_FR)) { 352 env->hflags |= MIPS_HFLAG_F64; 353 } 354 if (((env->hflags & MIPS_HFLAG_KSU) != MIPS_HFLAG_KM) && 355 (env->CP0_Config5 & (1 << CP0C5_SBRI))) { 356 env->hflags |= MIPS_HFLAG_SBRI; 357 } 358 if (env->insn_flags & ASE_DSPR2) { 359 /* Enables access MIPS DSP resources, now our cpu is DSP ASER2, 360 so enable to access DSPR2 resources. */ 361 if (env->CP0_Status & (1 << CP0St_MX)) { 362 env->hflags |= MIPS_HFLAG_DSP | MIPS_HFLAG_DSPR2; 363 } 364 365 } else if (env->insn_flags & ASE_DSP) { 366 /* Enables access MIPS DSP resources, now our cpu is DSP ASE, 367 so enable to access DSP resources. */ 368 if (env->CP0_Status & (1 << CP0St_MX)) { 369 env->hflags |= MIPS_HFLAG_DSP; 370 } 371 372 } 373 if (env->insn_flags & ISA_MIPS32R2) { 374 if (env->active_fpu.fcr0 & (1 << FCR0_F64)) { 375 env->hflags |= MIPS_HFLAG_COP1X; 376 } 377 } else if (env->insn_flags & ISA_MIPS32) { 378 if (env->hflags & MIPS_HFLAG_64) { 379 env->hflags |= MIPS_HFLAG_COP1X; 380 } 381 } else if (env->insn_flags & ISA_MIPS4) { 382 /* All supported MIPS IV CPUs use the XX (CU3) to enable 383 and disable the MIPS IV extensions to the MIPS III ISA. 384 Some other MIPS IV CPUs ignore the bit, so the check here 385 would be too restrictive for them. */ 386 if (env->CP0_Status & (1U << CP0St_CU3)) { 387 env->hflags |= MIPS_HFLAG_COP1X; 388 } 389 } 390 if (env->insn_flags & ASE_MSA) { 391 if (env->CP0_Config5 & (1 << CP0C5_MSAEn)) { 392 env->hflags |= MIPS_HFLAG_MSA; 393 } 394 } 395 if (env->active_fpu.fcr0 & (1 << FCR0_FREP)) { 396 if (env->CP0_Config5 & (1 << CP0C5_FRE)) { 397 env->hflags |= MIPS_HFLAG_FRE; 398 } 399 } 400 if (env->CP0_Config3 & (1 << CP0C3_LPA)) { 401 if (env->CP0_PageGrain & (1 << CP0PG_ELPA)) { 402 env->hflags |= MIPS_HFLAG_ELPA; 403 } 404 } 405 } 406 407 void cpu_mips_tlb_flush(CPUMIPSState *env); 408 void sync_c0_status(CPUMIPSState *env, CPUMIPSState *cpu, int tc); 409 void cpu_mips_store_status(CPUMIPSState *env, target_ulong val); 410 void cpu_mips_store_cause(CPUMIPSState *env, target_ulong val); 411 412 void QEMU_NORETURN do_raise_exception_err(CPUMIPSState *env, uint32_t exception, 413 int error_code, uintptr_t pc); 414 415 static inline void QEMU_NORETURN do_raise_exception(CPUMIPSState *env, 416 uint32_t exception, 417 uintptr_t pc) 418 { 419 do_raise_exception_err(env, exception, 0, pc); 420 } 421 422 #endif 423