1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * QEMU LoongArch CPU 4 * 5 * Copyright (c) 2021 Loongson Technology Corporation Limited 6 */ 7 8 #ifndef LOONGARCH_CPU_H 9 #define LOONGARCH_CPU_H 10 11 #include "qemu/int128.h" 12 #include "exec/cpu-defs.h" 13 #include "fpu/softfloat-types.h" 14 #include "hw/registerfields.h" 15 #include "qemu/timer.h" 16 #ifndef CONFIG_USER_ONLY 17 #include "exec/memory.h" 18 #endif 19 #include "cpu-csr.h" 20 21 #define IOCSRF_TEMP 0 22 #define IOCSRF_NODECNT 1 23 #define IOCSRF_MSI 2 24 #define IOCSRF_EXTIOI 3 25 #define IOCSRF_CSRIPI 4 26 #define IOCSRF_FREQCSR 5 27 #define IOCSRF_FREQSCALE 6 28 #define IOCSRF_DVFSV1 7 29 #define IOCSRF_GMOD 9 30 #define IOCSRF_VM 11 31 32 #define VERSION_REG 0x0 33 #define FEATURE_REG 0x8 34 #define VENDOR_REG 0x10 35 #define CPUNAME_REG 0x20 36 #define MISC_FUNC_REG 0x420 37 #define IOCSRM_EXTIOI_EN 48 38 39 #define IOCSR_MEM_SIZE 0x428 40 41 #define TCG_GUEST_DEFAULT_MO (0) 42 43 #define FCSR0_M1 0x1f /* FCSR1 mask, Enables */ 44 #define FCSR0_M2 0x1f1f0000 /* FCSR2 mask, Cause and Flags */ 45 #define FCSR0_M3 0x300 /* FCSR3 mask, Round Mode */ 46 #define FCSR0_RM 8 /* Round Mode bit num on fcsr0 */ 47 48 FIELD(FCSR0, ENABLES, 0, 5) 49 FIELD(FCSR0, RM, 8, 2) 50 FIELD(FCSR0, FLAGS, 16, 5) 51 FIELD(FCSR0, CAUSE, 24, 5) 52 53 #define GET_FP_CAUSE(REG) FIELD_EX32(REG, FCSR0, CAUSE) 54 #define SET_FP_CAUSE(REG, V) \ 55 do { \ 56 (REG) = FIELD_DP32(REG, FCSR0, CAUSE, V); \ 57 } while (0) 58 #define UPDATE_FP_CAUSE(REG, V) \ 59 do { \ 60 (REG) |= FIELD_DP32(0, FCSR0, CAUSE, V); \ 61 } while (0) 62 63 #define GET_FP_ENABLES(REG) FIELD_EX32(REG, FCSR0, ENABLES) 64 #define SET_FP_ENABLES(REG, V) \ 65 do { \ 66 (REG) = FIELD_DP32(REG, FCSR0, ENABLES, V); \ 67 } while (0) 68 69 #define GET_FP_FLAGS(REG) FIELD_EX32(REG, FCSR0, FLAGS) 70 #define SET_FP_FLAGS(REG, V) \ 71 do { \ 72 (REG) = FIELD_DP32(REG, FCSR0, FLAGS, V); \ 73 } while (0) 74 75 #define UPDATE_FP_FLAGS(REG, V) \ 76 do { \ 77 (REG) |= FIELD_DP32(0, FCSR0, FLAGS, V); \ 78 } while (0) 79 80 #define FP_INEXACT 1 81 #define FP_UNDERFLOW 2 82 #define FP_OVERFLOW 4 83 #define FP_DIV0 8 84 #define FP_INVALID 16 85 86 #define EXCODE(code, subcode) ( ((subcode) << 6) | (code) ) 87 #define EXCODE_MCODE(code) ( (code) & 0x3f ) 88 #define EXCODE_SUBCODE(code) ( (code) >> 6 ) 89 90 #define EXCCODE_EXTERNAL_INT 64 /* plus external interrupt number */ 91 #define EXCCODE_INT EXCODE(0, 0) 92 #define EXCCODE_PIL EXCODE(1, 0) 93 #define EXCCODE_PIS EXCODE(2, 0) 94 #define EXCCODE_PIF EXCODE(3, 0) 95 #define EXCCODE_PME EXCODE(4, 0) 96 #define EXCCODE_PNR EXCODE(5, 0) 97 #define EXCCODE_PNX EXCODE(6, 0) 98 #define EXCCODE_PPI EXCODE(7, 0) 99 #define EXCCODE_ADEF EXCODE(8, 0) /* Different exception subcode */ 100 #define EXCCODE_ADEM EXCODE(8, 1) 101 #define EXCCODE_ALE EXCODE(9, 0) 102 #define EXCCODE_BCE EXCODE(10, 0) 103 #define EXCCODE_SYS EXCODE(11, 0) 104 #define EXCCODE_BRK EXCODE(12, 0) 105 #define EXCCODE_INE EXCODE(13, 0) 106 #define EXCCODE_IPE EXCODE(14, 0) 107 #define EXCCODE_FPD EXCODE(15, 0) 108 #define EXCCODE_SXD EXCODE(16, 0) 109 #define EXCCODE_ASXD EXCODE(17, 0) 110 #define EXCCODE_FPE EXCODE(18, 0) /* Different exception subcode */ 111 #define EXCCODE_VFPE EXCODE(18, 1) 112 #define EXCCODE_WPEF EXCODE(19, 0) /* Different exception subcode */ 113 #define EXCCODE_WPEM EXCODE(19, 1) 114 #define EXCCODE_BTD EXCODE(20, 0) 115 #define EXCCODE_BTE EXCODE(21, 0) 116 #define EXCCODE_DBP EXCODE(26, 0) /* Reserved subcode used for debug */ 117 118 /* cpucfg[0] bits */ 119 FIELD(CPUCFG0, PRID, 0, 32) 120 121 /* cpucfg[1] bits */ 122 FIELD(CPUCFG1, ARCH, 0, 2) 123 FIELD(CPUCFG1, PGMMU, 2, 1) 124 FIELD(CPUCFG1, IOCSR, 3, 1) 125 FIELD(CPUCFG1, PALEN, 4, 8) 126 FIELD(CPUCFG1, VALEN, 12, 8) 127 FIELD(CPUCFG1, UAL, 20, 1) 128 FIELD(CPUCFG1, RI, 21, 1) 129 FIELD(CPUCFG1, EP, 22, 1) 130 FIELD(CPUCFG1, RPLV, 23, 1) 131 FIELD(CPUCFG1, HP, 24, 1) 132 FIELD(CPUCFG1, IOCSR_BRD, 25, 1) 133 FIELD(CPUCFG1, MSG_INT, 26, 1) 134 135 /* cpucfg[1].arch */ 136 #define CPUCFG1_ARCH_LA32R 0 137 #define CPUCFG1_ARCH_LA32 1 138 #define CPUCFG1_ARCH_LA64 2 139 140 /* cpucfg[2] bits */ 141 FIELD(CPUCFG2, FP, 0, 1) 142 FIELD(CPUCFG2, FP_SP, 1, 1) 143 FIELD(CPUCFG2, FP_DP, 2, 1) 144 FIELD(CPUCFG2, FP_VER, 3, 3) 145 FIELD(CPUCFG2, LSX, 6, 1) 146 FIELD(CPUCFG2, LASX, 7, 1) 147 FIELD(CPUCFG2, COMPLEX, 8, 1) 148 FIELD(CPUCFG2, CRYPTO, 9, 1) 149 FIELD(CPUCFG2, LVZ, 10, 1) 150 FIELD(CPUCFG2, LVZ_VER, 11, 3) 151 FIELD(CPUCFG2, LLFTP, 14, 1) 152 FIELD(CPUCFG2, LLFTP_VER, 15, 3) 153 FIELD(CPUCFG2, LBT_X86, 18, 1) 154 FIELD(CPUCFG2, LBT_ARM, 19, 1) 155 FIELD(CPUCFG2, LBT_MIPS, 20, 1) 156 FIELD(CPUCFG2, LSPW, 21, 1) 157 FIELD(CPUCFG2, LAM, 22, 1) 158 159 /* cpucfg[3] bits */ 160 FIELD(CPUCFG3, CCDMA, 0, 1) 161 FIELD(CPUCFG3, SFB, 1, 1) 162 FIELD(CPUCFG3, UCACC, 2, 1) 163 FIELD(CPUCFG3, LLEXC, 3, 1) 164 FIELD(CPUCFG3, SCDLY, 4, 1) 165 FIELD(CPUCFG3, LLDBAR, 5, 1) 166 FIELD(CPUCFG3, ITLBHMC, 6, 1) 167 FIELD(CPUCFG3, ICHMC, 7, 1) 168 FIELD(CPUCFG3, SPW_LVL, 8, 3) 169 FIELD(CPUCFG3, SPW_HP_HF, 11, 1) 170 FIELD(CPUCFG3, RVA, 12, 1) 171 FIELD(CPUCFG3, RVAMAX, 13, 4) 172 173 /* cpucfg[4] bits */ 174 FIELD(CPUCFG4, CC_FREQ, 0, 32) 175 176 /* cpucfg[5] bits */ 177 FIELD(CPUCFG5, CC_MUL, 0, 16) 178 FIELD(CPUCFG5, CC_DIV, 16, 16) 179 180 /* cpucfg[6] bits */ 181 FIELD(CPUCFG6, PMP, 0, 1) 182 FIELD(CPUCFG6, PMVER, 1, 3) 183 FIELD(CPUCFG6, PMNUM, 4, 4) 184 FIELD(CPUCFG6, PMBITS, 8, 6) 185 FIELD(CPUCFG6, UPM, 14, 1) 186 187 /* cpucfg[16] bits */ 188 FIELD(CPUCFG16, L1_IUPRE, 0, 1) 189 FIELD(CPUCFG16, L1_IUUNIFY, 1, 1) 190 FIELD(CPUCFG16, L1_DPRE, 2, 1) 191 FIELD(CPUCFG16, L2_IUPRE, 3, 1) 192 FIELD(CPUCFG16, L2_IUUNIFY, 4, 1) 193 FIELD(CPUCFG16, L2_IUPRIV, 5, 1) 194 FIELD(CPUCFG16, L2_IUINCL, 6, 1) 195 FIELD(CPUCFG16, L2_DPRE, 7, 1) 196 FIELD(CPUCFG16, L2_DPRIV, 8, 1) 197 FIELD(CPUCFG16, L2_DINCL, 9, 1) 198 FIELD(CPUCFG16, L3_IUPRE, 10, 1) 199 FIELD(CPUCFG16, L3_IUUNIFY, 11, 1) 200 FIELD(CPUCFG16, L3_IUPRIV, 12, 1) 201 FIELD(CPUCFG16, L3_IUINCL, 13, 1) 202 FIELD(CPUCFG16, L3_DPRE, 14, 1) 203 FIELD(CPUCFG16, L3_DPRIV, 15, 1) 204 FIELD(CPUCFG16, L3_DINCL, 16, 1) 205 206 /* cpucfg[17] bits */ 207 FIELD(CPUCFG17, L1IU_WAYS, 0, 16) 208 FIELD(CPUCFG17, L1IU_SETS, 16, 8) 209 FIELD(CPUCFG17, L1IU_SIZE, 24, 7) 210 211 /* cpucfg[18] bits */ 212 FIELD(CPUCFG18, L1D_WAYS, 0, 16) 213 FIELD(CPUCFG18, L1D_SETS, 16, 8) 214 FIELD(CPUCFG18, L1D_SIZE, 24, 7) 215 216 /* cpucfg[19] bits */ 217 FIELD(CPUCFG19, L2IU_WAYS, 0, 16) 218 FIELD(CPUCFG19, L2IU_SETS, 16, 8) 219 FIELD(CPUCFG19, L2IU_SIZE, 24, 7) 220 221 /* cpucfg[20] bits */ 222 FIELD(CPUCFG20, L3IU_WAYS, 0, 16) 223 FIELD(CPUCFG20, L3IU_SETS, 16, 8) 224 FIELD(CPUCFG20, L3IU_SIZE, 24, 7) 225 226 /*CSR_CRMD */ 227 FIELD(CSR_CRMD, PLV, 0, 2) 228 FIELD(CSR_CRMD, IE, 2, 1) 229 FIELD(CSR_CRMD, DA, 3, 1) 230 FIELD(CSR_CRMD, PG, 4, 1) 231 FIELD(CSR_CRMD, DATF, 5, 2) 232 FIELD(CSR_CRMD, DATM, 7, 2) 233 FIELD(CSR_CRMD, WE, 9, 1) 234 235 extern const char * const regnames[32]; 236 extern const char * const fregnames[32]; 237 238 #define N_IRQS 13 239 #define IRQ_TIMER 11 240 #define IRQ_IPI 12 241 242 #define LOONGARCH_STLB 2048 /* 2048 STLB */ 243 #define LOONGARCH_MTLB 64 /* 64 MTLB */ 244 #define LOONGARCH_TLB_MAX (LOONGARCH_STLB + LOONGARCH_MTLB) 245 246 /* 247 * define the ASID PS E VPPN field of TLB 248 */ 249 FIELD(TLB_MISC, E, 0, 1) 250 FIELD(TLB_MISC, ASID, 1, 10) 251 FIELD(TLB_MISC, VPPN, 13, 35) 252 FIELD(TLB_MISC, PS, 48, 6) 253 254 #define LSX_LEN (128) 255 #define LASX_LEN (256) 256 257 typedef union VReg { 258 int8_t B[LASX_LEN / 8]; 259 int16_t H[LASX_LEN / 16]; 260 int32_t W[LASX_LEN / 32]; 261 int64_t D[LASX_LEN / 64]; 262 uint8_t UB[LASX_LEN / 8]; 263 uint16_t UH[LASX_LEN / 16]; 264 uint32_t UW[LASX_LEN / 32]; 265 uint64_t UD[LASX_LEN / 64]; 266 Int128 Q[LASX_LEN / 128]; 267 } VReg; 268 269 typedef union fpr_t fpr_t; 270 union fpr_t { 271 VReg vreg; 272 }; 273 274 struct LoongArchTLB { 275 uint64_t tlb_misc; 276 /* Fields corresponding to CSR_TLBELO0/1 */ 277 uint64_t tlb_entry0; 278 uint64_t tlb_entry1; 279 }; 280 typedef struct LoongArchTLB LoongArchTLB; 281 282 typedef struct CPUArchState { 283 uint64_t gpr[32]; 284 uint64_t pc; 285 286 fpr_t fpr[32]; 287 float_status fp_status; 288 bool cf[8]; 289 290 uint32_t fcsr0; 291 uint32_t fcsr0_mask; 292 293 uint32_t cpucfg[21]; 294 295 uint64_t lladdr; /* LL virtual address compared against SC */ 296 uint64_t llval; 297 298 /* LoongArch CSRs */ 299 uint64_t CSR_CRMD; 300 uint64_t CSR_PRMD; 301 uint64_t CSR_EUEN; 302 uint64_t CSR_MISC; 303 uint64_t CSR_ECFG; 304 uint64_t CSR_ESTAT; 305 uint64_t CSR_ERA; 306 uint64_t CSR_BADV; 307 uint64_t CSR_BADI; 308 uint64_t CSR_EENTRY; 309 uint64_t CSR_TLBIDX; 310 uint64_t CSR_TLBEHI; 311 uint64_t CSR_TLBELO0; 312 uint64_t CSR_TLBELO1; 313 uint64_t CSR_ASID; 314 uint64_t CSR_PGDL; 315 uint64_t CSR_PGDH; 316 uint64_t CSR_PGD; 317 uint64_t CSR_PWCL; 318 uint64_t CSR_PWCH; 319 uint64_t CSR_STLBPS; 320 uint64_t CSR_RVACFG; 321 uint64_t CSR_PRCFG1; 322 uint64_t CSR_PRCFG2; 323 uint64_t CSR_PRCFG3; 324 uint64_t CSR_SAVE[16]; 325 uint64_t CSR_TID; 326 uint64_t CSR_TCFG; 327 uint64_t CSR_TVAL; 328 uint64_t CSR_CNTC; 329 uint64_t CSR_TICLR; 330 uint64_t CSR_LLBCTL; 331 uint64_t CSR_IMPCTL1; 332 uint64_t CSR_IMPCTL2; 333 uint64_t CSR_TLBRENTRY; 334 uint64_t CSR_TLBRBADV; 335 uint64_t CSR_TLBRERA; 336 uint64_t CSR_TLBRSAVE; 337 uint64_t CSR_TLBRELO0; 338 uint64_t CSR_TLBRELO1; 339 uint64_t CSR_TLBREHI; 340 uint64_t CSR_TLBRPRMD; 341 uint64_t CSR_MERRCTL; 342 uint64_t CSR_MERRINFO1; 343 uint64_t CSR_MERRINFO2; 344 uint64_t CSR_MERRENTRY; 345 uint64_t CSR_MERRERA; 346 uint64_t CSR_MERRSAVE; 347 uint64_t CSR_CTAG; 348 uint64_t CSR_DMW[4]; 349 uint64_t CSR_DBG; 350 uint64_t CSR_DERA; 351 uint64_t CSR_DSAVE; 352 uint64_t CSR_CPUID; 353 354 #ifndef CONFIG_USER_ONLY 355 LoongArchTLB tlb[LOONGARCH_TLB_MAX]; 356 357 AddressSpace address_space_iocsr; 358 MemoryRegion system_iocsr; 359 MemoryRegion iocsr_mem; 360 bool load_elf; 361 uint64_t elf_address; 362 /* Store ipistate to access from this struct */ 363 DeviceState *ipistate; 364 #endif 365 } CPULoongArchState; 366 367 /** 368 * LoongArchCPU: 369 * @env: #CPULoongArchState 370 * 371 * A LoongArch CPU. 372 */ 373 struct ArchCPU { 374 /*< private >*/ 375 CPUState parent_obj; 376 /*< public >*/ 377 378 CPULoongArchState env; 379 QEMUTimer timer; 380 uint32_t phy_id; 381 382 /* 'compatible' string for this CPU for Linux device trees */ 383 const char *dtb_compatible; 384 }; 385 386 #define TYPE_LOONGARCH_CPU "loongarch-cpu" 387 #define TYPE_LOONGARCH32_CPU "loongarch32-cpu" 388 #define TYPE_LOONGARCH64_CPU "loongarch64-cpu" 389 390 OBJECT_DECLARE_CPU_TYPE(LoongArchCPU, LoongArchCPUClass, 391 LOONGARCH_CPU) 392 393 /** 394 * LoongArchCPUClass: 395 * @parent_realize: The parent class' realize handler. 396 * @parent_phases: The parent class' reset phase handlers. 397 * 398 * A LoongArch CPU model. 399 */ 400 struct LoongArchCPUClass { 401 /*< private >*/ 402 CPUClass parent_class; 403 /*< public >*/ 404 405 DeviceRealize parent_realize; 406 ResettablePhases parent_phases; 407 }; 408 409 /* 410 * LoongArch CPUs has 4 privilege levels. 411 * 0 for kernel mode, 3 for user mode. 412 * Define an extra index for DA(direct addressing) mode. 413 */ 414 #define MMU_PLV_KERNEL 0 415 #define MMU_PLV_USER 3 416 #define MMU_IDX_KERNEL MMU_PLV_KERNEL 417 #define MMU_IDX_USER MMU_PLV_USER 418 #define MMU_IDX_DA 4 419 420 static inline int cpu_mmu_index(CPULoongArchState *env, bool ifetch) 421 { 422 #ifdef CONFIG_USER_ONLY 423 return MMU_IDX_USER; 424 #else 425 if (FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PG)) { 426 return FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PLV); 427 } 428 return MMU_IDX_DA; 429 #endif 430 } 431 432 static inline bool is_la64(CPULoongArchState *env) 433 { 434 return FIELD_EX32(env->cpucfg[1], CPUCFG1, ARCH) == CPUCFG1_ARCH_LA64; 435 } 436 437 static inline bool is_va32(CPULoongArchState *env) 438 { 439 /* VA32 if !LA64 or VA32L[1-3] */ 440 bool va32 = !is_la64(env); 441 uint64_t plv = FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PLV); 442 if (plv >= 1 && (FIELD_EX64(env->CSR_MISC, CSR_MISC, VA32) & (1 << plv))) { 443 va32 = true; 444 } 445 return va32; 446 } 447 448 static inline void set_pc(CPULoongArchState *env, uint64_t value) 449 { 450 if (is_va32(env)) { 451 env->pc = (uint32_t)value; 452 } else { 453 env->pc = value; 454 } 455 } 456 457 /* 458 * LoongArch CPUs hardware flags. 459 */ 460 #define HW_FLAGS_PLV_MASK R_CSR_CRMD_PLV_MASK /* 0x03 */ 461 #define HW_FLAGS_EUEN_FPE 0x04 462 #define HW_FLAGS_EUEN_SXE 0x08 463 #define HW_FLAGS_CRMD_PG R_CSR_CRMD_PG_MASK /* 0x10 */ 464 #define HW_FLAGS_VA32 0x20 465 #define HW_FLAGS_EUEN_ASXE 0x40 466 467 static inline void cpu_get_tb_cpu_state(CPULoongArchState *env, vaddr *pc, 468 uint64_t *cs_base, uint32_t *flags) 469 { 470 *pc = env->pc; 471 *cs_base = 0; 472 *flags = env->CSR_CRMD & (R_CSR_CRMD_PLV_MASK | R_CSR_CRMD_PG_MASK); 473 *flags |= FIELD_EX64(env->CSR_EUEN, CSR_EUEN, FPE) * HW_FLAGS_EUEN_FPE; 474 *flags |= FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE) * HW_FLAGS_EUEN_SXE; 475 *flags |= FIELD_EX64(env->CSR_EUEN, CSR_EUEN, ASXE) * HW_FLAGS_EUEN_ASXE; 476 *flags |= is_va32(env) * HW_FLAGS_VA32; 477 } 478 479 void loongarch_cpu_list(void); 480 481 #define cpu_list loongarch_cpu_list 482 483 #include "exec/cpu-all.h" 484 485 #define LOONGARCH_CPU_TYPE_SUFFIX "-" TYPE_LOONGARCH_CPU 486 #define LOONGARCH_CPU_TYPE_NAME(model) model LOONGARCH_CPU_TYPE_SUFFIX 487 #define CPU_RESOLVING_TYPE TYPE_LOONGARCH_CPU 488 489 #endif /* LOONGARCH_CPU_H */ 490