+#define NB_MMU_MODES 4
+
+#endif
diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
new file mode 100644
index 0000000000..76b89d1606
--- /dev/null
+++ b/target/loongarch/cpu.c
@@ -0,0 +1,314 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QEMU LoongArch CPU
+ *
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/qemu-print.h"
+#include "qapi/error.h"
+#include "qemu/module.h"
+#include "sysemu/qtest.h"
+#include "exec/exec-all.h"
+#include "qapi/qapi-commands-machine-target.h"
+#include "cpu.h"
+#include "internals.h"
+#include "fpu/softfloat-helpers.h"
+
+const char * const regnames[32] = {
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+ "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
+};
+
+const char * const fregnames[32] = {
+ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
+ "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
+ "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
+ "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
+};
+
+static const char * const excp_names[EXCP_LAST + 1] = {
+ [EXCP_SYSCALL] = "Syscall",
+ [EXCP_BREAK] = "Break",
+ [EXCP_INE] = "Instruction Non-existent",
+
+ data = 0;
+ data = FIELD_DP32(data, CPUCFG18, L1D_WAYS, 0x8003);
+ data = FIELD_DP32(data, CPUCFG18, L1D_SETS, 0x60);
+ env->cpucfg[18] = data;
+
+ data = 0;
+ data = FIELD_DP32(data, CPUCFG19, L2IU_WAYS, 0x800f);
+ data = FIELD_DP32(data, CPUCFG19, L2IU_SETS, 0x60);
+ env->cpucfg[19] = data;
+
+ data = 0;
+ data = FIELD_DP32(data, CPUCFG20, L3IU_WAYS, 0xf00f);
+ data = FIELD_DP32(data, CPUCFG20, L3IU_SETS, 0x60);
+ env->cpucfg[20] = data;
+}
+
+static void loongarch_cpu_list_entry(gpointer data, gpointer user_data)
+{
+ const char *typename = object_class_get_name(OBJECT_CLASS(data));
+
+ qemu_printf("%s\n", typename);
+}
+
+void loongarch_cpu_list(void)
+{
+ GSList *list;
+ list = object_class_get_list_sorted(TYPE_LOONGARCH_CPU, false);
+ g_slist_foreach(list, loongarch_cpu_list_entry, NULL);
+ g_slist_free(list);
+}
+
+static void loongarch_cpu_reset(DeviceState *dev)
+{
+ CPUState *cs = CPU(dev);
+ LoongArchCPU *cpu = LOONGARCH_CPU(cs);
+ LoongArchCPUClass *lacc = LOONGARCH_CPU_GET_CLASS(cpu);
+ CPULoongArchState *env = &cpu->env;
+
+ lacc->parent_reset(dev);
+
+ env->fcsr0_mask = FCSR0_M1 | FCSR0_M2 | FCSR0_M3;
+ env->fcsr0 = 0x0;
+
+ cs->exception_index = EXCP_NONE;
+}
+
+static void loongarch_cpu_disas_set_info(CPUState *s, disassemble_info *info)
+{
+ info->print_insn = print_insn_loongarch;
+}
+
+static void loongarch_cpu_realizefn(DeviceState *dev, Error **errp)
+{
+ CPUState *cs = CPU(dev);
+ LoongArchCPUClass *lacc = LOONGARCH_CPU_GET_CLASS(dev);
+ Error *local_err = NULL;
+
+ cpu_exec_realizefn(cs, &local_err);
+ if (local_err != NULL) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ cpu_reset(cs);
+ qemu_init_vcpu(cs);
+
+ lacc->parent_realize(dev, errp);
+}
+
+static void loongarch_cpu_initfn(Object *obj)
+{
+ LoongArchCPU *cpu = LOONGARCH_CPU(obj);
+
+ cpu_set_cpustate_pointers(cpu);
+}
+
+static ObjectClass *loongarch_cpu_class_by_name(const char *cpu_model)
+{
+ ObjectClass *oc;
+ char *typename;
+
+ typename = g_strdup_printf(LOONGARCH_CPU_TYPE_NAME("%s"), cpu_model);
+ oc = object_class_by_name(typename);
+ g_free(typename);
+ return oc;
+}
+
+void loongarch_cpu_dump_state(CPUState *cs, FILE *f, int flags)
+{
+ LoongArchCPU *cpu = LOONGARCH_CPU(cs);
+ CPULoongArchState *env = &cpu->env;
+ int i;
+
+ qemu_fprintf(f, " PC=%016" PRIx64 " ", env->pc);
+ qemu_fprintf(f, " FCSR0 0x%08x fp_status 0x%02x\n", env->fcsr0,
+ get_float_exception_flags(&env->fp_status));
+
+ /* gpr */
+ for (i = 0; i < 32; i++) {
+ if ((i & 3) == 0) {
+ qemu_fprintf(f, " GPR%02d:", i);
+ }
+ qemu_fprintf(f, " %s %016" PRIx64, regnames[i], env->gpr[i]);
+ if ((i & 3) == 3) {
+ qemu_fprintf(f, "\n");
+ }
+ }
+
+ /* fpr */
+ if (flags & CPU_DUMP_FPU) {
+ for (i = 0; i < 32; i++) {
+ qemu_fprintf(f, " %s %016" PRIx64, fregnames[i], env->fpr[i]);
+ if ((i & 3) == 3) {
+ qemu_fprintf(f, "\n");
+ }
+ }
+ }
+}
+
+#ifdef CONFIG_TCG
+#include "hw/core/tcg-cpu-ops.h"
+
+static struct TCGCPUOps loongarch_tcg_ops = {
+ .initialize = loongarch_translate_init,
+ .synchronize_from_tb = loongarch_cpu_synchronize_from_tb,
+};
+#endif /* CONFIG_TCG */
+
+static void loongarch_cpu_class_init(ObjectClass *c, void *data)
+{
+ LoongArchCPUClass *lacc = LOONGARCH_CPU_CLASS(c);
+ CPUClass *cc = CPU_CLASS(c);
+ DeviceClass *dc = DEVICE_CLASS(c);
+
+ device_class_set_parent_realize(dc, loongarch_cpu_realizefn,
+ &lacc->parent_realize);
+ device_class_set_parent_reset(dc, loongarch_cpu_reset,
&lacc->parent_reset);
+
+ cc->class_by_name = loongarch_cpu_class_by_name;
+ cc->has_work = loongarch_cpu_has_work;
+ cc->dump_state = loongarch_cpu_dump_state;
+ cc->set_pc = loongarch_cpu_set_pc;
+ cc->disas_set_info = loongarch_cpu_disas_set_info;
+#ifdef CONFIG_TCG
+ cc->tcg_ops = &loongarch_tcg_ops;
+#endif
+}
+
+#define DEFINE_LOONGARCH_CPU_TYPE(model, initfn) \
+ { \
+ .parent = TYPE_LOONGARCH_CPU, \
+ .instance_init = initfn, \
+ .name = LOONGARCH_CPU_TYPE_NAME(model), \
+ }
+
+static const TypeInfo loongarch_cpu_type_infos[] = {
+ {
+ .name = TYPE_LOONGARCH_CPU,
+ .parent = TYPE_CPU,
+ .instance_size = sizeof(LoongArchCPU),
+ .instance_init = loongarch_cpu_initfn,
+
+ .abstract = true,
+ .class_size = sizeof(LoongArchCPUClass),
+ .class_init = loongarch_cpu_class_init,
+ },
+ DEFINE_LOONGARCH_CPU_TYPE("Loongson-3A5000", loongarch_3a5000_initfn),
+};
+
+DEFINE_TYPES(loongarch_cpu_type_infos)
diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
new file mode 100644
index 0000000000..b036cdee5f
--- /dev/null
+++ b/target/loongarch/cpu.h
@@ -0,0 +1,252 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QEMU LoongArch CPU
+ *
+ * Copyright (c) 2021 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_CPU_H
+#define LOONGARCH_CPU_H
+
+#include "exec/cpu-defs.h"
+#include "fpu/softfloat-types.h"
+#include "hw/registerfields.h"
+
+#define TCG_GUEST_DEFAULT_MO (0)
+
+#define FCSR0_M1 0x1f /* FCSR1 mask, Enables */
+#define FCSR0_M2 0x1f1f0000 /* FCSR2 mask, Cause and Flags */
+#define FCSR0_M3 0x300 /* FCSR3 mask, Round Mode */
+#define FCSR0_RM 8 /* Round Mode bit num on fcsr0 */
+
+FIELD(FCSR0, ENABLES, 0, 5)
+FIELD(FCSR0, RM, 8, 2)
+FIELD(FCSR0, FLAGS, 16, 5)
+FIELD(FCSR0, CAUSE, 24, 5)
+
+#define GET_FP_CAUSE(REG) FIELD_EX32(REG, FCSR0, CAUSE)
+#define SET_FP_CAUSE(REG, V) FIELD_DP32(REG, FCSR0, CAUSE, V)
+#define GET_FP_ENABLES(REG) FIELD_EX32(REG, FCSR0, ENABLES)
+#define SET_FP_ENABLES(REG, V) FIELD_DP32(REG, FCSR0, ENABLES, V)
+#define GET_FP_FLAGS(REG) FIELD_EX32(REG, FCSR0, FLAGS)
+#define SET_FP_FLAGS(REG, V) FIELD_DP32(REG, FCSR0, FLAGS, V)
+#define UPDATE_FP_FLAGS(REG, V) \
+ do { \
+ (REG) |= FIELD_DP32(0, FCSR0, FLAGS, V); \
+ } while (0)
+
+#define FP_INEXACT 1
+#define FP_UNDERFLOW 2
+#define FP_OVERFLOW 4
+#define FP_DIV0 8
+#define FP_INVALID 16
+
+/* cpucfg[0] bits */
+FIELD(CPUCFG0, PRID, 0, 32)
+
+/* cpucfg[1] bits */
+FIELD(CPUCFG1, ARCH, 0, 2)
+FIELD(CPUCFG1, PGMMU, 2, 1)
+FIELD(CPUCFG1, IOCSR, 3, 1)
+FIELD(CPUCFG1, PALEN, 4, 8)
+FIELD(CPUCFG1, VALEN, 12, 8)
+FIELD(CPUCFG1, UAL, 20, 1)
+FIELD(CPUCFG1, RI, 21, 1)
+FIELD(CPUCFG1, EP, 22, 1)
+FIELD(CPUCFG1, RPLV, 23, 1)
+FIELD(CPUCFG1, HP, 24, 1)
+FIELD(CPUCFG1, IOCSR_BRD, 25, 1)
+FIELD(CPUCFG1, MSG_INT, 26, 1)
+
+/* cpucfg[2] bits */
+FIELD(CPUCFG2, FP, 0, 1)
+FIELD(CPUCFG2, FP_SP, 1, 1)
+FIELD(CPUCFG2, FP_DP, 2, 1)
+FIELD(CPUCFG2, FP_VER, 3, 3)
+FIELD(CPUCFG2, LSX, 6, 1)
+FIELD(CPUCFG2, LASX, 7, 1)
+FIELD(CPUCFG2, COMPLEX, 8, 1)
+FIELD(CPUCFG2, CRYPTO, 9, 1)
+FIELD(CPUCFG2, LVZ, 10, 1)
+FIELD(CPUCFG2, LVZ_VER, 11, 3)
+FIELD(CPUCFG2, LLFTP, 14, 1)
+FIELD(CPUCFG2, LLFTP_VER, 15, 3)
+FIELD(CPUCFG2, LBT_X86, 18, 1)
+FIELD(CPUCFG2, LBT_ARM, 19, 1)
+FIELD(CPUCFG2, LBT_MIPS, 20, 1)
+FIELD(CPUCFG2, LSPW, 21, 1)
+FIELD(CPUCFG2, LAM, 22, 1)
+
+/* cpucfg[3] bits */
+FIELD(CPUCFG3, CCDMA, 0, 1)
+FIELD(CPUCFG3, SFB, 1, 1)
+FIELD(CPUCFG3, UCACC, 2, 1)
+FIELD(CPUCFG3, LLEXC, 3, 1)
+FIELD(CPUCFG3, SCDLY, 4, 1)
+FIELD(CPUCFG3, LLDBAR, 5, 1)
+FIELD(CPUCFG3, ITLBHMC, 6, 1)
+FIELD(CPUCFG3, ICHMC, 7, 1)
+FIELD(CPUCFG3, SPW_LVL, 8, 3)
+FIELD(CPUCFG3, SPW_HP_HF, 11, 1)
+FIELD(CPUCFG3, RVA, 12, 1)
+FIELD(CPUCFG3, RVAMAX, 13, 4)
+
+/* cpucfg[4] bits */
+FIELD(CPUCFG4, CC_FREQ, 0, 32)
+
+/* cpucfg[5] bits */
+FIELD(CPUCFG5, CC_MUL, 0, 16)
+FIELD(CPUCFG5, CC_DIV, 16, 16)
+
+/* cpucfg[6] bits */
+FIELD(CPUCFG6, PMP, 0, 1)
+FIELD(CPUCFG6, PMVER, 1, 3)
+FIELD(CPUCFG6, PMNUM, 4, 4)
+FIELD(CPUCFG6, PMBITS, 8, 6)
+FIELD(CPUCFG6, UPM, 14, 1)
+
+/* cpucfg[16] bits */
+FIELD(CPUCFG16, L1_IUPRE, 0, 1)
+FIELD(CPUCFG16, L1_IUUNIFY, 1, 1)
+FIELD(CPUCFG16, L1_DPRE, 2, 1)
+FIELD(CPUCFG16, L2_IUPRE, 3, 1)
+FIELD(CPUCFG16, L2_IUUNIFY, 4, 1)
+FIELD(CPUCFG16, L2_IUPRIV, 5, 1)
+FIELD(CPUCFG16, L2_IUINCL, 6, 1)
+FIELD(CPUCFG16, L2_DPRE, 7, 1)
+FIELD(CPUCFG16, L2_DPRIV, 8, 1)
+FIELD(CPUCFG16, L2_DINCL, 9, 1)
+FIELD(CPUCFG16, L3_IUPRE, 10, 1)
+FIELD(CPUCFG16, L3_IUUNIFY, 11, 1)
+FIELD(CPUCFG16, L3_IUPRIV, 12, 1)
+FIELD(CPUCFG16, L3_IUINCL, 13, 1)
+FIELD(CPUCFG16, L3_DPRE, 14, 1)
+FIELD(CPUCFG16, L3_DPRIV, 15, 1)
+FIELD(CPUCFG16, L3_DINCL, 16, 1)
+
+/* cpucfg[17] bits */
+FIELD(CPUCFG17, L1IU_WAYS, 0, 16)
+FIELD(CPUCFG17, L1IU_SETS, 16, 8)
+FIELD(CPUCFG17, L1IU_SIZE, 24, 7)
+
+/* cpucfg[18] bits */
+FIELD(CPUCFG18, L1D_WAYS, 0, 16)
+FIELD(CPUCFG18, L1D_SETS, 16, 8)
+FIELD(CPUCFG18, L1D_SIZE, 24, 7)
+
+/* cpucfg[19] bits */
+FIELD(CPUCFG19, L2IU_WAYS, 0, 16)
+FIELD(CPUCFG19, L2IU_SETS, 16, 8)
+FIELD(CPUCFG19, L2IU_SIZE, 24, 7)
+
+/* cpucfg[20] bits */
+FIELD(CPUCFG20, L3IU_WAYS, 0, 16)
+FIELD(CPUCFG20, L3IU_SETS, 16, 8)
+FIELD(CPUCFG20, L3IU_SIZE, 24, 7)
+
+extern const char * const regnames[32];
+extern const char * const fregnames[32];
+
+typedef struct CPULoongArchState CPULoongArchState;
+struct CPULoongArchState {
+ uint64_t gpr[32];
+ uint64_t pc;
+
+ uint64_t fpr[32];
+ float_status fp_status;
+ bool cf[8];
+
+ /*
+ * fcsr0
+ * 31:29 |28:24 |23:21 |20:16 |15:10 |9:8 |7:5 |4:0
+ * Cause Flags RM Enables
+ */
+ uint32_t fcsr0;
+ uint32_t fcsr0_mask;
