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