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 #include "qemu/osdep.h" 9 #include "qemu/log.h" 10 #include "qemu/qemu-print.h" 11 #include "qapi/error.h" 12 #include "qemu/module.h" 13 #include "sysemu/qtest.h" 14 #include "exec/exec-all.h" 15 #include "cpu.h" 16 #include "internals.h" 17 #include "fpu/softfloat-helpers.h" 18 #include "cpu-csr.h" 19 #include "sysemu/reset.h" 20 #include "tcg/tcg.h" 21 22 const char * const regnames[32] = { 23 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", 24 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", 25 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", 26 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", 27 }; 28 29 const char * const fregnames[32] = { 30 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", 31 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", 32 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", 33 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", 34 }; 35 36 static const char * const excp_names[] = { 37 [EXCCODE_INT] = "Interrupt", 38 [EXCCODE_PIL] = "Page invalid exception for load", 39 [EXCCODE_PIS] = "Page invalid exception for store", 40 [EXCCODE_PIF] = "Page invalid exception for fetch", 41 [EXCCODE_PME] = "Page modified exception", 42 [EXCCODE_PNR] = "Page Not Readable exception", 43 [EXCCODE_PNX] = "Page Not Executable exception", 44 [EXCCODE_PPI] = "Page Privilege error", 45 [EXCCODE_ADEF] = "Address error for instruction fetch", 46 [EXCCODE_ADEM] = "Address error for Memory access", 47 [EXCCODE_SYS] = "Syscall", 48 [EXCCODE_BRK] = "Break", 49 [EXCCODE_INE] = "Instruction Non-Existent", 50 [EXCCODE_IPE] = "Instruction privilege error", 51 [EXCCODE_FPD] = "Floating Point Disabled", 52 [EXCCODE_FPE] = "Floating Point Exception", 53 [EXCCODE_DBP] = "Debug breakpoint", 54 [EXCCODE_BCE] = "Bound Check Exception", 55 [EXCCODE_SXD] = "128 bit vector instructions Disable exception", 56 }; 57 58 const char *loongarch_exception_name(int32_t exception) 59 { 60 assert(excp_names[exception]); 61 return excp_names[exception]; 62 } 63 64 void G_NORETURN do_raise_exception(CPULoongArchState *env, 65 uint32_t exception, 66 uintptr_t pc) 67 { 68 CPUState *cs = env_cpu(env); 69 70 qemu_log_mask(CPU_LOG_INT, "%s: %d (%s)\n", 71 __func__, 72 exception, 73 loongarch_exception_name(exception)); 74 cs->exception_index = exception; 75 76 cpu_loop_exit_restore(cs, pc); 77 } 78 79 static void loongarch_cpu_set_pc(CPUState *cs, vaddr value) 80 { 81 LoongArchCPU *cpu = LOONGARCH_CPU(cs); 82 CPULoongArchState *env = &cpu->env; 83 84 env->pc = value; 85 } 86 87 static vaddr loongarch_cpu_get_pc(CPUState *cs) 88 { 89 LoongArchCPU *cpu = LOONGARCH_CPU(cs); 90 CPULoongArchState *env = &cpu->env; 91 92 return env->pc; 93 } 94 95 #ifndef CONFIG_USER_ONLY 96 #include "hw/loongarch/virt.h" 97 98 void loongarch_cpu_set_irq(void *opaque, int irq, int level) 99 { 100 LoongArchCPU *cpu = opaque; 101 CPULoongArchState *env = &cpu->env; 102 CPUState *cs = CPU(cpu); 103 104 if (irq < 0 || irq >= N_IRQS) { 105 return; 106 } 107 108 env->CSR_ESTAT = deposit64(env->CSR_ESTAT, irq, 1, level != 0); 109 110 if (FIELD_EX64(env->CSR_ESTAT, CSR_ESTAT, IS)) { 111 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 112 } else { 113 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 114 } 115 } 116 117 static inline bool cpu_loongarch_hw_interrupts_enabled(CPULoongArchState *env) 118 { 119 bool ret = 0; 120 121 ret = (FIELD_EX64(env->CSR_CRMD, CSR_CRMD, IE) && 122 !(FIELD_EX64(env->CSR_DBG, CSR_DBG, DST))); 123 124 return ret; 125 } 126 127 /* Check if there is pending and not masked out interrupt */ 128 static inline bool cpu_loongarch_hw_interrupts_pending(CPULoongArchState *env) 129 { 130 uint32_t pending; 131 uint32_t status; 132 133 pending = FIELD_EX64(env->CSR_ESTAT, CSR_ESTAT, IS); 134 status = FIELD_EX64(env->CSR_ECFG, CSR_ECFG, LIE); 135 136 return (pending & status) != 0; 137 } 138 139 static void loongarch_cpu_do_interrupt(CPUState *cs) 140 { 141 LoongArchCPU *cpu = LOONGARCH_CPU(cs); 142 CPULoongArchState *env = &cpu->env; 143 bool update_badinstr = 1; 144 int cause = -1; 145 const char *name; 146 bool tlbfill = FIELD_EX64(env->CSR_TLBRERA, CSR_TLBRERA, ISTLBR); 147 uint32_t vec_size = FIELD_EX64(env->CSR_ECFG, CSR_ECFG, VS); 148 149 if (cs->exception_index != EXCCODE_INT) { 150 if (cs->exception_index < 0 || 151 cs->exception_index >= ARRAY_SIZE(excp_names)) { 152 name = "unknown"; 153 } else { 154 name = excp_names[cs->exception_index]; 155 } 156 157 qemu_log_mask(CPU_LOG_INT, 158 "%s enter: pc " TARGET_FMT_lx " ERA " TARGET_FMT_lx 159 " TLBRERA " TARGET_FMT_lx " %s exception\n", __func__, 160 env->pc, env->CSR_ERA, env->CSR_TLBRERA, name); 161 } 162 163 switch (cs->exception_index) { 164 case EXCCODE_DBP: 165 env->CSR_DBG = FIELD_DP64(env->CSR_DBG, CSR_DBG, DCL, 1); 166 env->CSR_DBG = FIELD_DP64(env->CSR_DBG, CSR_DBG, ECODE, 0xC); 167 goto set_DERA; 168 set_DERA: 169 env->CSR_DERA = env->pc; 170 env->CSR_DBG = FIELD_DP64(env->CSR_DBG, CSR_DBG, DST, 1); 171 env->pc = env->CSR_EENTRY + 0x480; 172 break; 173 case EXCCODE_INT: 174 if (FIELD_EX64(env->CSR_DBG, CSR_DBG, DST)) { 175 env->CSR_DBG = FIELD_DP64(env->CSR_DBG, CSR_DBG, DEI, 1); 176 goto set_DERA; 177 } 178 QEMU_FALLTHROUGH; 179 case EXCCODE_PIF: 180 case EXCCODE_ADEF: 181 cause = cs->exception_index; 182 update_badinstr = 0; 183 break; 184 case EXCCODE_SYS: 185 case EXCCODE_BRK: 186 case EXCCODE_INE: 187 case EXCCODE_IPE: 188 case EXCCODE_FPD: 189 case EXCCODE_FPE: 190 case EXCCODE_SXD: 191 env->CSR_BADV = env->pc; 192 QEMU_FALLTHROUGH; 193 case EXCCODE_BCE: 194 case EXCCODE_ADEM: 195 case EXCCODE_PIL: 196 case EXCCODE_PIS: 197 case EXCCODE_PME: 198 case EXCCODE_PNR: 199 case EXCCODE_PNX: 200 case EXCCODE_PPI: 201 cause = cs->exception_index; 202 break; 203 default: 204 qemu_log("Error: exception(%d) has not been supported\n", 205 cs->exception_index); 206 abort(); 207 } 208 209 if (update_badinstr) { 210 env->CSR_BADI = cpu_ldl_code(env, env->pc); 211 } 212 213 /* Save PLV and IE */ 214 if (tlbfill) { 215 env->CSR_TLBRPRMD = FIELD_DP64(env->CSR_TLBRPRMD, CSR_TLBRPRMD, PPLV, 216 FIELD_EX64(env->CSR_CRMD, 217 CSR_CRMD, PLV)); 218 env->CSR_TLBRPRMD = FIELD_DP64(env->CSR_TLBRPRMD, CSR_TLBRPRMD, PIE, 219 FIELD_EX64(env->CSR_CRMD, CSR_CRMD, IE)); 220 /* set the DA mode */ 221 env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, DA, 1); 222 env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, PG, 0); 223 env->CSR_TLBRERA = FIELD_DP64(env->CSR_TLBRERA, CSR_TLBRERA, 224 PC, (env->pc >> 2)); 225 } else { 226 env->CSR_ESTAT = FIELD_DP64(env->CSR_ESTAT, CSR_ESTAT, ECODE, 227 EXCODE_MCODE(cause)); 228 env->CSR_ESTAT = FIELD_DP64(env->CSR_ESTAT, CSR_ESTAT, ESUBCODE, 229 EXCODE_SUBCODE(cause)); 230 env->CSR_PRMD = FIELD_DP64(env->CSR_PRMD, CSR_PRMD, PPLV, 231 FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PLV)); 232 env->CSR_PRMD = FIELD_DP64(env->CSR_PRMD, CSR_PRMD, PIE, 233 FIELD_EX64(env->CSR_CRMD, CSR_CRMD, IE)); 234 env->CSR_ERA = env->pc; 235 } 236 237 env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, PLV, 0); 238 env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, IE, 0); 239 240 if (vec_size) { 241 vec_size = (1 << vec_size) * 4; 242 } 243 244 if (cs->exception_index == EXCCODE_INT) { 245 /* Interrupt */ 246 uint32_t vector = 0; 247 uint32_t pending = FIELD_EX64(env->CSR_ESTAT, CSR_ESTAT, IS); 248 pending &= FIELD_EX64(env->CSR_ECFG, CSR_ECFG, LIE); 249 250 /* Find the highest-priority interrupt. */ 251 vector = 31 - clz32(pending); 252 env->pc = env->CSR_EENTRY + (EXCCODE_EXTERNAL_INT + vector) * vec_size; 253 qemu_log_mask(CPU_LOG_INT, 254 "%s: PC " TARGET_FMT_lx " ERA " TARGET_FMT_lx 255 " cause %d\n" " A " TARGET_FMT_lx " D " 256 TARGET_FMT_lx " vector = %d ExC " TARGET_FMT_lx "ExS" 257 TARGET_FMT_lx "\n", 258 __func__, env->pc, env->CSR_ERA, 259 cause, env->CSR_BADV, env->CSR_DERA, vector, 260 env->CSR_ECFG, env->CSR_ESTAT); 261 } else { 262 if (tlbfill) { 263 env->pc = env->CSR_TLBRENTRY; 264 } else { 265 env->pc = env->CSR_EENTRY; 266 env->pc += EXCODE_MCODE(cause) * vec_size; 267 } 268 qemu_log_mask(CPU_LOG_INT, 269 "%s: PC " TARGET_FMT_lx " ERA " TARGET_FMT_lx 270 " cause %d%s\n, ESTAT " TARGET_FMT_lx 271 " EXCFG " TARGET_FMT_lx " BADVA " TARGET_FMT_lx 272 "BADI " TARGET_FMT_lx " SYS_NUM " TARGET_FMT_lu 273 " cpu %d asid " TARGET_FMT_lx "\n", __func__, env->pc, 274 tlbfill ? env->CSR_TLBRERA : env->CSR_ERA, 275 cause, tlbfill ? "(refill)" : "", env->CSR_ESTAT, 276 env->CSR_ECFG, 277 tlbfill ? env->CSR_TLBRBADV : env->CSR_BADV, 278 env->CSR_BADI, env->gpr[11], cs->cpu_index, 279 env->CSR_ASID); 280 } 281 cs->exception_index = -1; 282 } 283 284 static void loongarch_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, 285 vaddr addr, unsigned size, 286 MMUAccessType access_type, 287 int mmu_idx, MemTxAttrs attrs, 288 MemTxResult response, 289 uintptr_t retaddr) 290 { 291 LoongArchCPU *cpu = LOONGARCH_CPU(cs); 292 CPULoongArchState *env = &cpu->env; 293 294 if (access_type == MMU_INST_FETCH) { 295 do_raise_exception(env, EXCCODE_ADEF, retaddr); 296 } else { 297 do_raise_exception(env, EXCCODE_ADEM, retaddr); 298 } 299 } 300 301 static bool loongarch_cpu_exec_interrupt(CPUState *cs, int interrupt_request) 302 { 303 if (interrupt_request & CPU_INTERRUPT_HARD) { 304 LoongArchCPU *cpu = LOONGARCH_CPU(cs); 305 CPULoongArchState *env = &cpu->env; 306 307 if (cpu_loongarch_hw_interrupts_enabled(env) && 308 cpu_loongarch_hw_interrupts_pending(env)) { 309 /* Raise it */ 310 cs->exception_index = EXCCODE_INT; 311 loongarch_cpu_do_interrupt(cs); 312 return true; 313 } 314 } 315 return false; 316 } 317 #endif 318 319 #ifdef CONFIG_TCG 320 static void loongarch_cpu_synchronize_from_tb(CPUState *cs, 321 const TranslationBlock *tb) 322 { 323 LoongArchCPU *cpu = LOONGARCH_CPU(cs); 324 CPULoongArchState *env = &cpu->env; 325 326 tcg_debug_assert(!(cs->tcg_cflags & CF_PCREL)); 327 env->pc = tb->pc; 328 } 329 330 static void loongarch_restore_state_to_opc(CPUState *cs, 331 const TranslationBlock *tb, 332 const uint64_t *data) 333 { 334 LoongArchCPU *cpu = LOONGARCH_CPU(cs); 335 CPULoongArchState *env = &cpu->env; 336 337 env->pc = data[0]; 338 } 339 #endif /* CONFIG_TCG */ 340 341 static bool loongarch_cpu_has_work(CPUState *cs) 342 { 343 #ifdef CONFIG_USER_ONLY 344 return true; 345 #else 346 LoongArchCPU *cpu = LOONGARCH_CPU(cs); 347 CPULoongArchState *env = &cpu->env; 348 bool has_work = false; 349 350 if ((cs->interrupt_request & CPU_INTERRUPT_HARD) && 351 cpu_loongarch_hw_interrupts_pending(env)) { 352 has_work = true; 353 } 354 355 return has_work; 356 #endif 357 } 358 359 static void loongarch_la464_initfn(Object *obj) 360 { 361 LoongArchCPU *cpu = LOONGARCH_CPU(obj); 362 CPULoongArchState *env = &cpu->env; 363 int i; 364 365 for (i = 0; i < 21; i++) { 366 env->cpucfg[i] = 0x0; 367 } 368 369 cpu->dtb_compatible = "loongarch,Loongson-3A5000"; 370 env->cpucfg[0] = 0x14c010; /* PRID */ 371 372 uint32_t data = 0; 373 data = FIELD_DP32(data, CPUCFG1, ARCH, 2); 374 data = FIELD_DP32(data, CPUCFG1, PGMMU, 1); 375 data = FIELD_DP32(data, CPUCFG1, IOCSR, 1); 376 data = FIELD_DP32(data, CPUCFG1, PALEN, 0x2f); 377 data = FIELD_DP32(data, CPUCFG1, VALEN, 0x2f); 378 data = FIELD_DP32(data, CPUCFG1, UAL, 1); 379 data = FIELD_DP32(data, CPUCFG1, RI, 1); 380 data = FIELD_DP32(data, CPUCFG1, EP, 1); 381 data = FIELD_DP32(data, CPUCFG1, RPLV, 1); 382 data = FIELD_DP32(data, CPUCFG1, HP, 1); 383 data = FIELD_DP32(data, CPUCFG1, IOCSR_BRD, 1); 384 env->cpucfg[1] = data; 385 386 data = 0; 387 data = FIELD_DP32(data, CPUCFG2, FP, 1); 388 data = FIELD_DP32(data, CPUCFG2, FP_SP, 1); 389 data = FIELD_DP32(data, CPUCFG2, FP_DP, 1); 390 data = FIELD_DP32(data, CPUCFG2, FP_VER, 1); 391 data = FIELD_DP32(data, CPUCFG2, LSX, 1), 392 data = FIELD_DP32(data, CPUCFG2, LLFTP, 1); 393 data = FIELD_DP32(data, CPUCFG2, LLFTP_VER, 1); 394 data = FIELD_DP32(data, CPUCFG2, LAM, 1); 395 env->cpucfg[2] = data; 396 397 env->cpucfg[4] = 100 * 1000 * 1000; /* Crystal frequency */ 398 399 data = 0; 400 data = FIELD_DP32(data, CPUCFG5, CC_MUL, 1); 401 data = FIELD_DP32(data, CPUCFG5, CC_DIV, 1); 402 env->cpucfg[5] = data; 403 404 data = 0; 405 data = FIELD_DP32(data, CPUCFG16, L1_IUPRE, 1); 406 data = FIELD_DP32(data, CPUCFG16, L1_DPRE, 1); 407 data = FIELD_DP32(data, CPUCFG16, L2_IUPRE, 1); 408 data = FIELD_DP32(data, CPUCFG16, L2_IUUNIFY, 1); 409 data = FIELD_DP32(data, CPUCFG16, L2_IUPRIV, 1); 410 data = FIELD_DP32(data, CPUCFG16, L3_IUPRE, 1); 411 data = FIELD_DP32(data, CPUCFG16, L3_IUUNIFY, 1); 412 data = FIELD_DP32(data, CPUCFG16, L3_IUINCL, 1); 413 env->cpucfg[16] = data; 414 415 data = 0; 416 data = FIELD_DP32(data, CPUCFG17, L1IU_WAYS, 3); 417 data = FIELD_DP32(data, CPUCFG17, L1IU_SETS, 8); 418 data = FIELD_DP32(data, CPUCFG17, L1IU_SIZE, 6); 419 env->cpucfg[17] = data; 420 421 data = 0; 422 data = FIELD_DP32(data, CPUCFG18, L1D_WAYS, 3); 423 data = FIELD_DP32(data, CPUCFG18, L1D_SETS, 8); 424 data = FIELD_DP32(data, CPUCFG18, L1D_SIZE, 6); 425 env->cpucfg[18] = data; 426 427 data = 0; 428 data = FIELD_DP32(data, CPUCFG19, L2IU_WAYS, 15); 429 data = FIELD_DP32(data, CPUCFG19, L2IU_SETS, 8); 430 data = FIELD_DP32(data, CPUCFG19, L2IU_SIZE, 6); 431 env->cpucfg[19] = data; 432 433 data = 0; 434 data = FIELD_DP32(data, CPUCFG20, L3IU_WAYS, 15); 435 data = FIELD_DP32(data, CPUCFG20, L3IU_SETS, 14); 436 data = FIELD_DP32(data, CPUCFG20, L3IU_SIZE, 6); 437 env->cpucfg[20] = data; 438 439 env->CSR_ASID = FIELD_DP64(0, CSR_ASID, ASIDBITS, 0xa); 440 } 441 442 static void loongarch_cpu_list_entry(gpointer data, gpointer user_data) 443 { 444 const char *typename = object_class_get_name(OBJECT_CLASS(data)); 445 446 qemu_printf("%s\n", typename); 447 } 448 449 void loongarch_cpu_list(void) 450 { 451 GSList *list; 452 list = object_class_get_list_sorted(TYPE_LOONGARCH_CPU, false); 453 g_slist_foreach(list, loongarch_cpu_list_entry, NULL); 454 g_slist_free(list); 455 } 456 457 static void loongarch_cpu_reset_hold(Object *obj) 458 { 459 CPUState *cs = CPU(obj); 460 LoongArchCPU *cpu = LOONGARCH_CPU(cs); 461 LoongArchCPUClass *lacc = LOONGARCH_CPU_GET_CLASS(cpu); 462 CPULoongArchState *env = &cpu->env; 463 464 if (lacc->parent_phases.hold) { 465 lacc->parent_phases.hold(obj); 466 } 467 468 env->fcsr0_mask = FCSR0_M1 | FCSR0_M2 | FCSR0_M3; 469 env->fcsr0 = 0x0; 470 471 int n; 472 /* Set csr registers value after reset */ 473 env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, PLV, 0); 474 env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, IE, 0); 475 env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, DA, 1); 476 env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, PG, 0); 477 env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, DATF, 1); 478 env->CSR_CRMD = FIELD_DP64(env->CSR_CRMD, CSR_CRMD, DATM, 1); 479 480 env->CSR_EUEN = FIELD_DP64(env->CSR_EUEN, CSR_EUEN, FPE, 0); 481 env->CSR_EUEN = FIELD_DP64(env->CSR_EUEN, CSR_EUEN, SXE, 0); 482 env->CSR_EUEN = FIELD_DP64(env->CSR_EUEN, CSR_EUEN, ASXE, 0); 483 env->CSR_EUEN = FIELD_DP64(env->CSR_EUEN, CSR_EUEN, BTE, 0); 484 485 env->CSR_MISC = 0; 486 487 env->CSR_ECFG = FIELD_DP64(env->CSR_ECFG, CSR_ECFG, VS, 0); 488 env->CSR_ECFG = FIELD_DP64(env->CSR_ECFG, CSR_ECFG, LIE, 0); 489 490 env->CSR_ESTAT = env->CSR_ESTAT & (~MAKE_64BIT_MASK(0, 2)); 491 env->CSR_RVACFG = FIELD_DP64(env->CSR_RVACFG, CSR_RVACFG, RBITS, 0); 492 env->CSR_TCFG = FIELD_DP64(env->CSR_TCFG, CSR_TCFG, EN, 0); 493 env->CSR_LLBCTL = FIELD_DP64(env->CSR_LLBCTL, CSR_LLBCTL, KLO, 0); 494 env->CSR_TLBRERA = FIELD_DP64(env->CSR_TLBRERA, CSR_TLBRERA, ISTLBR, 0); 495 env->CSR_MERRCTL = FIELD_DP64(env->CSR_MERRCTL, CSR_MERRCTL, ISMERR, 0); 496 497 env->CSR_PRCFG3 = FIELD_DP64(env->CSR_PRCFG3, CSR_PRCFG3, TLB_TYPE, 2); 498 env->CSR_PRCFG3 = FIELD_DP64(env->CSR_PRCFG3, CSR_PRCFG3, MTLB_ENTRY, 63); 499 env->CSR_PRCFG3 = FIELD_DP64(env->CSR_PRCFG3, CSR_PRCFG3, STLB_WAYS, 7); 500 env->CSR_PRCFG3 = FIELD_DP64(env->CSR_PRCFG3, CSR_PRCFG3, STLB_SETS, 8); 501 502 for (n = 0; n < 4; n++) { 503 env->CSR_DMW[n] = FIELD_DP64(env->CSR_DMW[n], CSR_DMW, PLV0, 0); 504 env->CSR_DMW[n] = FIELD_DP64(env->CSR_DMW[n], CSR_DMW, PLV1, 0); 505 env->CSR_DMW[n] = FIELD_DP64(env->CSR_DMW[n], CSR_DMW, PLV2, 0); 506 env->CSR_DMW[n] = FIELD_DP64(env->CSR_DMW[n], CSR_DMW, PLV3, 0); 507 } 508 509 #ifndef CONFIG_USER_ONLY 510 env->pc = 0x1c000000; 511 memset(env->tlb, 0, sizeof(env->tlb)); 512 #endif 513 514 restore_fp_status(env); 515 cs->exception_index = -1; 516 } 517 518 static void loongarch_cpu_disas_set_info(CPUState *s, disassemble_info *info) 519 { 520 info->print_insn = print_insn_loongarch; 521 } 522 523 static void loongarch_cpu_realizefn(DeviceState *dev, Error **errp) 524 { 525 CPUState *cs = CPU(dev); 526 LoongArchCPUClass *lacc = LOONGARCH_CPU_GET_CLASS(dev); 527 Error *local_err = NULL; 528 529 cpu_exec_realizefn(cs, &local_err); 530 if (local_err != NULL) { 531 error_propagate(errp, local_err); 532 return; 533 } 534 535 loongarch_cpu_register_gdb_regs_for_features(cs); 536 537 cpu_reset(cs); 538 qemu_init_vcpu(cs); 539 540 lacc->parent_realize(dev, errp); 541 } 542 543 #ifndef CONFIG_USER_ONLY 544 static void loongarch_qemu_write(void *opaque, hwaddr addr, 545 uint64_t val, unsigned size) 546 { 547 } 548 549 static uint64_t loongarch_qemu_read(void *opaque, hwaddr addr, unsigned size) 550 { 551 switch (addr) { 552 case VERSION_REG: 553 return 0x11ULL; 554 case FEATURE_REG: 555 return 1ULL << IOCSRF_MSI | 1ULL << IOCSRF_EXTIOI | 556 1ULL << IOCSRF_CSRIPI; 557 case VENDOR_REG: 558 return 0x6e6f73676e6f6f4cULL; /* "Loongson" */ 559 case CPUNAME_REG: 560 return 0x303030354133ULL; /* "3A5000" */ 561 case MISC_FUNC_REG: 562 return 1ULL << IOCSRM_EXTIOI_EN; 563 } 564 return 0ULL; 565 } 566 567 static const MemoryRegionOps loongarch_qemu_ops = { 568 .read = loongarch_qemu_read, 569 .write = loongarch_qemu_write, 570 .endianness = DEVICE_LITTLE_ENDIAN, 571 .valid = { 572 .min_access_size = 4, 573 .max_access_size = 8, 574 }, 575 .impl = { 576 .min_access_size = 8, 577 .max_access_size = 8, 578 }, 579 }; 580 #endif 581 582 static void loongarch_cpu_init(Object *obj) 583 { 584 LoongArchCPU *cpu = LOONGARCH_CPU(obj); 585 586 cpu_set_cpustate_pointers(cpu); 587 588 #ifndef CONFIG_USER_ONLY 589 CPULoongArchState *env = &cpu->env; 590 qdev_init_gpio_in(DEVICE(cpu), loongarch_cpu_set_irq, N_IRQS); 591 timer_init_ns(&cpu->timer, QEMU_CLOCK_VIRTUAL, 592 &loongarch_constant_timer_cb, cpu); 593 memory_region_init_io(&env->system_iocsr, OBJECT(cpu), NULL, 594 env, "iocsr", UINT64_MAX); 595 address_space_init(&env->address_space_iocsr, &env->system_iocsr, "IOCSR"); 596 memory_region_init_io(&env->iocsr_mem, OBJECT(cpu), &loongarch_qemu_ops, 597 NULL, "iocsr_misc", 0x428); 598 memory_region_add_subregion(&env->system_iocsr, 0, &env->iocsr_mem); 599 #endif 600 } 601 602 static ObjectClass *loongarch_cpu_class_by_name(const char *cpu_model) 603 { 604 ObjectClass *oc; 605 606 oc = object_class_by_name(cpu_model); 607 if (!oc) { 608 g_autofree char *typename 609 = g_strdup_printf(LOONGARCH_CPU_TYPE_NAME("%s"), cpu_model); 610 oc = object_class_by_name(typename); 611 if (!oc) { 612 return NULL; 613 } 614 } 615 616 if (object_class_dynamic_cast(oc, TYPE_LOONGARCH_CPU) 617 && !object_class_is_abstract(oc)) { 618 return oc; 619 } 620 return NULL; 621 } 622 623 void loongarch_cpu_dump_state(CPUState *cs, FILE *f, int flags) 624 { 625 LoongArchCPU *cpu = LOONGARCH_CPU(cs); 626 CPULoongArchState *env = &cpu->env; 627 int i; 628 629 qemu_fprintf(f, " PC=%016" PRIx64 " ", env->pc); 630 qemu_fprintf(f, " FCSR0 0x%08x fp_status 0x%02x\n", env->fcsr0, 631 get_float_exception_flags(&env->fp_status)); 632 633 /* gpr */ 634 for (i = 0; i < 32; i++) { 635 if ((i & 3) == 0) { 636 qemu_fprintf(f, " GPR%02d:", i); 637 } 638 qemu_fprintf(f, " %s %016" PRIx64, regnames[i], env->gpr[i]); 639 if ((i & 3) == 3) { 640 qemu_fprintf(f, "\n"); 641 } 642 } 643 644 qemu_fprintf(f, "CRMD=%016" PRIx64 "\n", env->CSR_CRMD); 645 qemu_fprintf(f, "PRMD=%016" PRIx64 "\n", env->CSR_PRMD); 646 qemu_fprintf(f, "EUEN=%016" PRIx64 "\n", env->CSR_EUEN); 647 qemu_fprintf(f, "ESTAT=%016" PRIx64 "\n", env->CSR_ESTAT); 648 qemu_fprintf(f, "ERA=%016" PRIx64 "\n", env->CSR_ERA); 649 qemu_fprintf(f, "BADV=%016" PRIx64 "\n", env->CSR_BADV); 650 qemu_fprintf(f, "BADI=%016" PRIx64 "\n", env->CSR_BADI); 651 qemu_fprintf(f, "EENTRY=%016" PRIx64 "\n", env->CSR_EENTRY); 652 qemu_fprintf(f, "PRCFG1=%016" PRIx64 ", PRCFG2=%016" PRIx64 "," 653 " PRCFG3=%016" PRIx64 "\n", 654 env->CSR_PRCFG1, env->CSR_PRCFG3, env->CSR_PRCFG3); 655 qemu_fprintf(f, "TLBRENTRY=%016" PRIx64 "\n", env->CSR_TLBRENTRY); 656 qemu_fprintf(f, "TLBRBADV=%016" PRIx64 "\n", env->CSR_TLBRBADV); 657 qemu_fprintf(f, "TLBRERA=%016" PRIx64 "\n", env->CSR_TLBRERA); 658 659 /* fpr */ 660 if (flags & CPU_DUMP_FPU) { 661 for (i = 0; i < 32; i++) { 662 qemu_fprintf(f, " %s %016" PRIx64, fregnames[i], env->fpr[i].vreg.D(0)); 663 if ((i & 3) == 3) { 664 qemu_fprintf(f, "\n"); 665 } 666 } 667 } 668 } 669 670 #ifdef CONFIG_TCG 671 #include "hw/core/tcg-cpu-ops.h" 672 673 static struct TCGCPUOps loongarch_tcg_ops = { 674 .initialize = loongarch_translate_init, 675 .synchronize_from_tb = loongarch_cpu_synchronize_from_tb, 676 .restore_state_to_opc = loongarch_restore_state_to_opc, 677 678 #ifndef CONFIG_USER_ONLY 679 .tlb_fill = loongarch_cpu_tlb_fill, 680 .cpu_exec_interrupt = loongarch_cpu_exec_interrupt, 681 .do_interrupt = loongarch_cpu_do_interrupt, 682 .do_transaction_failed = loongarch_cpu_do_transaction_failed, 683 #endif 684 }; 685 #endif /* CONFIG_TCG */ 686 687 #ifndef CONFIG_USER_ONLY 688 #include "hw/core/sysemu-cpu-ops.h" 689 690 static const struct SysemuCPUOps loongarch_sysemu_ops = { 691 .get_phys_page_debug = loongarch_cpu_get_phys_page_debug, 692 }; 693 #endif 694 695 static gchar *loongarch_gdb_arch_name(CPUState *cs) 696 { 697 return g_strdup("loongarch64"); 698 } 699 700 static void loongarch_cpu_class_init(ObjectClass *c, void *data) 701 { 702 LoongArchCPUClass *lacc = LOONGARCH_CPU_CLASS(c); 703 CPUClass *cc = CPU_CLASS(c); 704 DeviceClass *dc = DEVICE_CLASS(c); 705 ResettableClass *rc = RESETTABLE_CLASS(c); 706 707 device_class_set_parent_realize(dc, loongarch_cpu_realizefn, 708 &lacc->parent_realize); 709 resettable_class_set_parent_phases(rc, NULL, loongarch_cpu_reset_hold, NULL, 710 &lacc->parent_phases); 711 712 cc->class_by_name = loongarch_cpu_class_by_name; 713 cc->has_work = loongarch_cpu_has_work; 714 cc->dump_state = loongarch_cpu_dump_state; 715 cc->set_pc = loongarch_cpu_set_pc; 716 cc->get_pc = loongarch_cpu_get_pc; 717 #ifndef CONFIG_USER_ONLY 718 dc->vmsd = &vmstate_loongarch_cpu; 719 cc->sysemu_ops = &loongarch_sysemu_ops; 720 #endif 721 cc->disas_set_info = loongarch_cpu_disas_set_info; 722 cc->gdb_read_register = loongarch_cpu_gdb_read_register; 723 cc->gdb_write_register = loongarch_cpu_gdb_write_register; 724 cc->disas_set_info = loongarch_cpu_disas_set_info; 725 cc->gdb_num_core_regs = 35; 726 cc->gdb_core_xml_file = "loongarch-base64.xml"; 727 cc->gdb_stop_before_watchpoint = true; 728 cc->gdb_arch_name = loongarch_gdb_arch_name; 729 730 #ifdef CONFIG_TCG 731 cc->tcg_ops = &loongarch_tcg_ops; 732 #endif 733 } 734 735 #define DEFINE_LOONGARCH_CPU_TYPE(model, initfn) \ 736 { \ 737 .parent = TYPE_LOONGARCH_CPU, \ 738 .instance_init = initfn, \ 739 .name = LOONGARCH_CPU_TYPE_NAME(model), \ 740 } 741 742 static const TypeInfo loongarch_cpu_type_infos[] = { 743 { 744 .name = TYPE_LOONGARCH_CPU, 745 .parent = TYPE_CPU, 746 .instance_size = sizeof(LoongArchCPU), 747 .instance_init = loongarch_cpu_init, 748 749 .abstract = true, 750 .class_size = sizeof(LoongArchCPUClass), 751 .class_init = loongarch_cpu_class_init, 752 }, 753 DEFINE_LOONGARCH_CPU_TYPE("la464", loongarch_la464_initfn), 754 }; 755 756 DEFINE_TYPES(loongarch_cpu_type_infos) 757