target/loongarch/cpu.c

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