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/* 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"
#include "qemu/timer.h"
#include "exec/memory.h"
#include "hw/sysbus.h"
#include "cpu-csr.h"
#define IOCSRF_TEMP 0
#define IOCSRF_NODECNT 1
#define IOCSRF_MSI 2
#define IOCSRF_EXTIOI 3
#define IOCSRF_CSRIPI 4
#define IOCSRF_FREQCSR 5
#define IOCSRF_FREQSCALE 6
#define IOCSRF_DVFSV1 7
#define IOCSRF_GMOD 9
#define IOCSRF_VM 11
#define FEATURE_REG 0x8
#define VENDOR_REG 0x10
#define CPUNAME_REG 0x20
#define MISC_FUNC_REG 0x420
#define IOCSRM_EXTIOI_EN 48
#define IOCSR_MEM_SIZE 0x428
#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) \
do { \
(REG) = FIELD_DP32(REG, FCSR0, CAUSE, V); \
} while (0)
#define GET_FP_ENABLES(REG) FIELD_EX32(REG, FCSR0, ENABLES)
#define SET_FP_ENABLES(REG, V) \
do { \
(REG) = FIELD_DP32(REG, FCSR0, ENABLES, V); \
} while (0)
#define GET_FP_FLAGS(REG) FIELD_EX32(REG, FCSR0, FLAGS)
#define SET_FP_FLAGS(REG, V) \
do { \
(REG) = FIELD_DP32(REG, FCSR0, FLAGS, V); \
} while (0)
#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
#define EXCODE(code, subcode) ( ((subcode) << 6) | (code) )
#define EXCODE_MCODE(code) ( (code) & 0x3f )
#define EXCODE_SUBCODE(code) ( (code) >> 6 )
#define EXCCODE_EXTERNAL_INT 64 /* plus external interrupt number */
#define EXCCODE_INT EXCODE(0, 0)
#define EXCCODE_PIL EXCODE(1, 0)
#define EXCCODE_PIS EXCODE(2, 0)
#define EXCCODE_PIF EXCODE(3, 0)
#define EXCCODE_PME EXCODE(4, 0)
#define EXCCODE_PNR EXCODE(5, 0)
#define EXCCODE_PNX EXCODE(6, 0)
#define EXCCODE_PPI EXCODE(7, 0)
#define EXCCODE_ADEF EXCODE(8, 0) /* Different exception subcode */
#define EXCCODE_ADEM EXCODE(8, 1)
#define EXCCODE_ALE EXCODE(9, 0)
#define EXCCODE_BCE EXCODE(10, 0)
#define EXCCODE_SYS EXCODE(11, 0)
#define EXCCODE_BRK EXCODE(12, 0)
#define EXCCODE_INE EXCODE(13, 0)
#define EXCCODE_IPE EXCODE(14, 0)
#define EXCCODE_FPD EXCODE(15, 0)
#define EXCCODE_SXD EXCODE(16, 0)
#define EXCCODE_ASXD EXCODE(17, 0)
#define EXCCODE_FPE EXCODE(18, 0) /* Different exception subcode */
#define EXCCODE_VFPE EXCODE(18, 1)
#define EXCCODE_WPEF EXCODE(19, 0) /* Different exception subcode */
#define EXCCODE_WPEM EXCODE(19, 1)
#define EXCCODE_BTD EXCODE(20, 0)
#define EXCCODE_BTE EXCODE(21, 0)
#define EXCCODE_DBP EXCODE(26, 0) /* Reserved subcode used for debug */
/* 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)
/*CSR_CRMD */
FIELD(CSR_CRMD, PLV, 0, 2)
FIELD(CSR_CRMD, IE, 2, 1)
FIELD(CSR_CRMD, DA, 3, 1)
FIELD(CSR_CRMD, PG, 4, 1)
FIELD(CSR_CRMD, DATF, 5, 2)
FIELD(CSR_CRMD, DATM, 7, 2)
FIELD(CSR_CRMD, WE, 9, 1)
extern const char * const regnames[32];
extern const char * const fregnames[32];
#define N_IRQS 13
#define IRQ_TIMER 11
#define IRQ_IPI 12
#define LOONGARCH_STLB 2048 /* 2048 STLB */
#define LOONGARCH_MTLB 64 /* 64 MTLB */
#define LOONGARCH_TLB_MAX (LOONGARCH_STLB + LOONGARCH_MTLB)
/*
* define the ASID PS E VPPN field of TLB
*/
FIELD(TLB_MISC, E, 0, 1)
FIELD(TLB_MISC, ASID, 1, 10)
FIELD(TLB_MISC, VPPN, 13, 35)
FIELD(TLB_MISC, PS, 48, 6)
struct LoongArchTLB {
uint64_t tlb_misc;
/* Fields corresponding to CSR_TLBELO0/1 */
uint64_t tlb_entry0;
uint64_t tlb_entry1;
};
typedef struct LoongArchTLB LoongArchTLB;
typedef struct CPUArchState {
uint64_t gpr[32];
uint64_t pc;
uint64_t fpr[32];
float_status fp_status;
bool cf[8];
uint32_t fcsr0;
uint32_t fcsr0_mask;
uint32_t cpucfg[21];
uint64_t lladdr; /* LL virtual address compared against SC */
uint64_t llval;
/* LoongArch CSRs */
uint64_t CSR_CRMD;
uint64_t CSR_PRMD;
uint64_t CSR_EUEN;
uint64_t CSR_MISC;
uint64_t CSR_ECFG;
uint64_t CSR_ESTAT;
uint64_t CSR_ERA;
uint64_t CSR_BADV;
uint64_t CSR_BADI;
uint64_t CSR_EENTRY;
uint64_t CSR_TLBIDX;
uint64_t CSR_TLBEHI;
uint64_t CSR_TLBELO0;
uint64_t CSR_TLBELO1;
uint64_t CSR_ASID;
uint64_t CSR_PGDL;
uint64_t CSR_PGDH;
uint64_t CSR_PGD;
uint64_t CSR_PWCL;
uint64_t CSR_PWCH;
uint64_t CSR_STLBPS;
uint64_t CSR_RVACFG;
uint64_t CSR_PRCFG1;
uint64_t CSR_PRCFG2;
uint64_t CSR_PRCFG3;
uint64_t CSR_SAVE[16];
uint64_t CSR_TID;
uint64_t CSR_TCFG;
uint64_t CSR_TVAL;
uint64_t CSR_CNTC;
uint64_t CSR_TICLR;
uint64_t CSR_LLBCTL;
uint64_t CSR_IMPCTL1;
uint64_t CSR_IMPCTL2;
uint64_t CSR_TLBRENTRY;
uint64_t CSR_TLBRBADV;
uint64_t CSR_TLBRERA;
uint64_t CSR_TLBRSAVE;
uint64_t CSR_TLBRELO0;
uint64_t CSR_TLBRELO1;
uint64_t CSR_TLBREHI;
uint64_t CSR_TLBRPRMD;
uint64_t CSR_MERRCTL;
uint64_t CSR_MERRINFO1;
uint64_t CSR_MERRINFO2;
uint64_t CSR_MERRENTRY;
uint64_t CSR_MERRERA;
uint64_t CSR_MERRSAVE;
uint64_t CSR_CTAG;
uint64_t CSR_DMW[4];
uint64_t CSR_DBG;
uint64_t CSR_DERA;
uint64_t CSR_DSAVE;
#ifndef CONFIG_USER_ONLY
LoongArchTLB tlb[LOONGARCH_TLB_MAX];
AddressSpace address_space_iocsr;
MemoryRegion system_iocsr;
MemoryRegion iocsr_mem;
bool load_elf;
uint64_t elf_address;
#endif
} CPULoongArchState;
/**
* LoongArchCPU:
* @env: #CPULoongArchState
*
* A LoongArch CPU.
*/
struct ArchCPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
CPUNegativeOffsetState neg;
CPULoongArchState env;
QEMUTimer timer;
/* 'compatible' string for this CPU for Linux device trees */
const char *dtb_compatible;
};
#define TYPE_LOONGARCH_CPU "loongarch-cpu"
OBJECT_DECLARE_CPU_TYPE(LoongArchCPU, LoongArchCPUClass,
LOONGARCH_CPU)
/**
* LoongArchCPUClass:
* @parent_realize: The parent class' realize handler.
* @parent_reset: The parent class' reset handler.
*
* A LoongArch CPU model.
*/
struct LoongArchCPUClass {
/*< private >*/
CPUClass parent_class;
/*< public >*/
DeviceRealize parent_realize;
DeviceReset parent_reset;
};
/*
* LoongArch CPUs has 4 privilege levels.
* 0 for kernel mode, 3 for user mode.
* Define an extra index for DA(direct addressing) mode.
*/
#define MMU_KERNEL_IDX 0
#define MMU_USER_IDX 3
#define MMU_DA_IDX 4
static inline int cpu_mmu_index(CPULoongArchState *env, bool ifetch)
{
#ifdef CONFIG_USER_ONLY
return MMU_USER_IDX;
#else
uint8_t pg = FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PG);
if (!pg) {
return MMU_DA_IDX;
}
return FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PLV);
#endif
}
/*
* LoongArch CPUs hardware flags.
*/
#define HW_FLAGS_PLV_MASK R_CSR_CRMD_PLV_MASK /* 0x03 */
#define HW_FLAGS_CRMD_PG R_CSR_CRMD_PG_MASK /* 0x10 */
#define HW_FLAGS_EUEN_FPE 0x04
static inline void cpu_get_tb_cpu_state(CPULoongArchState *env,
target_ulong *pc,
target_ulong *cs_base,
uint32_t *flags)
{
*pc = env->pc;
*cs_base = 0;
*flags = env->CSR_CRMD & (R_CSR_CRMD_PLV_MASK | R_CSR_CRMD_PG_MASK);
*flags |= FIELD_EX64(env->CSR_EUEN, CSR_EUEN, FPE) * HW_FLAGS_EUEN_FPE;
}
void loongarch_cpu_list(void);
#define cpu_list loongarch_cpu_list
#include "exec/cpu-all.h"
#define LOONGARCH_CPU_TYPE_SUFFIX "-" TYPE_LOONGARCH_CPU
#define LOONGARCH_CPU_TYPE_NAME(model) model LOONGARCH_CPU_TYPE_SUFFIX
#define CPU_RESOLVING_TYPE TYPE_LOONGARCH_CPU
#endif /* LOONGARCH_CPU_H */
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