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