/* * QEMU RISC-V CPU * * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu * Copyright (c) 2017-2018 SiFive, Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2 or later, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program. If not, see . */ #ifndef RISCV_CPU_H #define RISCV_CPU_H /* QEMU addressing/paging config */ #define TARGET_PAGE_BITS 12 /* 4 KiB Pages */ #if defined(TARGET_RISCV64) #define TARGET_LONG_BITS 64 #define TARGET_PHYS_ADDR_SPACE_BITS 56 /* 44-bit PPN */ #define TARGET_VIRT_ADDR_SPACE_BITS 48 /* sv48 */ #elif defined(TARGET_RISCV32) #define TARGET_LONG_BITS 32 #define TARGET_PHYS_ADDR_SPACE_BITS 34 /* 22-bit PPN */ #define TARGET_VIRT_ADDR_SPACE_BITS 32 /* sv32 */ #endif #define TCG_GUEST_DEFAULT_MO 0 #define CPUArchState struct CPURISCVState #include "qemu-common.h" #include "qom/cpu.h" #include "exec/cpu-defs.h" #include "fpu/softfloat.h" #define TYPE_RISCV_CPU "riscv-cpu" #define RISCV_CPU_TYPE_SUFFIX "-" TYPE_RISCV_CPU #define RISCV_CPU_TYPE_NAME(name) (name RISCV_CPU_TYPE_SUFFIX) #define CPU_RESOLVING_TYPE TYPE_RISCV_CPU #define TYPE_RISCV_CPU_ANY RISCV_CPU_TYPE_NAME("any") #define TYPE_RISCV_CPU_RV32GCSU_V1_09_1 RISCV_CPU_TYPE_NAME("rv32gcsu-v1.9.1") #define TYPE_RISCV_CPU_RV32GCSU_V1_10_0 RISCV_CPU_TYPE_NAME("rv32gcsu-v1.10.0") #define TYPE_RISCV_CPU_RV32IMACU_NOMMU RISCV_CPU_TYPE_NAME("rv32imacu-nommu") #define TYPE_RISCV_CPU_RV64GCSU_V1_09_1 RISCV_CPU_TYPE_NAME("rv64gcsu-v1.9.1") #define TYPE_RISCV_CPU_RV64GCSU_V1_10_0 RISCV_CPU_TYPE_NAME("rv64gcsu-v1.10.0") #define TYPE_RISCV_CPU_RV64IMACU_NOMMU RISCV_CPU_TYPE_NAME("rv64imacu-nommu") #define TYPE_RISCV_CPU_SIFIVE_E31 RISCV_CPU_TYPE_NAME("sifive-e31") #define TYPE_RISCV_CPU_SIFIVE_E51 RISCV_CPU_TYPE_NAME("sifive-e51") #define TYPE_RISCV_CPU_SIFIVE_U34 RISCV_CPU_TYPE_NAME("sifive-u34") #define TYPE_RISCV_CPU_SIFIVE_U54 RISCV_CPU_TYPE_NAME("sifive-u54") #define RV32 ((target_ulong)1 << (TARGET_LONG_BITS - 2)) #define RV64 ((target_ulong)2 << (TARGET_LONG_BITS - 2)) #if defined(TARGET_RISCV32) #define RVXLEN RV32 #elif defined(TARGET_RISCV64) #define RVXLEN RV64 #endif #define RV(x) ((target_ulong)1 << (x - 'A')) #define RVI RV('I') #define RVE RV('E') /* E and I are mutually exclusive */ #define RVM RV('M') #define RVA RV('A') #define RVF RV('F') #define RVD RV('D') #define RVC RV('C') #define RVS RV('S') #define RVU RV('U') /* S extension denotes that Supervisor mode exists, however it is possible to have a core that support S mode but does not have an MMU and there is currently no bit in misa to indicate whether an MMU exists or not so a cpu features bitfield is required, likewise for optional PMP support */ enum { RISCV_FEATURE_MMU, RISCV_FEATURE_PMP }; #define USER_VERSION_2_02_0 0x00020200 #define PRIV_VERSION_1_09_1 0x00010901 #define PRIV_VERSION_1_10_0 0x00011000 #define TRANSLATE_FAIL 1 #define TRANSLATE_SUCCESS 0 #define NB_MMU_MODES 4 #define MMU_USER_IDX 3 #define MAX_RISCV_PMPS (16) typedef struct CPURISCVState CPURISCVState; #include "pmp.h" struct CPURISCVState { target_ulong gpr[32]; uint64_t fpr[32]; /* assume both F and D extensions */ target_ulong pc; target_ulong load_res; target_ulong load_val; target_ulong frm; target_ulong badaddr; target_ulong user_ver; target_ulong priv_ver; target_ulong misa; uint32_t features; #ifndef CONFIG_USER_ONLY target_ulong priv; target_ulong resetvec; target_ulong mhartid; target_ulong mstatus; /* * CAUTION! Unlike the rest of this struct, mip is accessed asynchonously * by I/O threads. It should be read with atomic_read. It should be updated * using riscv_cpu_update_mip with the iothread mutex held. The iothread * mutex must be held because mip must be consistent with the CPU inturrept * state. riscv_cpu_update_mip calls cpu_interrupt or cpu_reset_interrupt * wuth the invariant that CPU_INTERRUPT_HARD is set iff mip is non-zero. * mip is 32-bits to allow atomic_read on 32-bit hosts. */ uint32_t mip; target_ulong mie; target_ulong mideleg; target_ulong sptbr; /* until: priv-1.9.1 */ target_ulong satp; /* since: priv-1.10.0 */ target_ulong sbadaddr; target_ulong mbadaddr; target_ulong medeleg; target_ulong stvec; target_ulong sepc; target_ulong scause; target_ulong mtvec; target_ulong mepc; target_ulong mcause; target_ulong mtval; /* since: priv-1.10.0 */ target_ulong scounteren; target_ulong mcounteren; target_ulong sscratch; target_ulong mscratch; /* temporary htif regs */ uint64_t mfromhost; uint64_t mtohost; uint64_t timecmp; /* physical memory protection */ pmp_table_t pmp_state; #endif float_status fp_status; /* QEMU */ CPU_COMMON /* Fields from here on are preserved across CPU reset. */ QEMUTimer *timer; /* Internal timer */ }; #define RISCV_CPU_CLASS(klass) \ OBJECT_CLASS_CHECK(RISCVCPUClass, (klass), TYPE_RISCV_CPU) #define RISCV_CPU(obj) \ OBJECT_CHECK(RISCVCPU, (obj), TYPE_RISCV_CPU) #define RISCV_CPU_GET_CLASS(obj) \ OBJECT_GET_CLASS(RISCVCPUClass, (obj), TYPE_RISCV_CPU) /** * RISCVCPUClass: * @parent_realize: The parent class' realize handler. * @parent_reset: The parent class' reset handler. * * A RISCV CPU model. */ typedef struct RISCVCPUClass { /*< private >*/ CPUClass parent_class; /*< public >*/ DeviceRealize parent_realize; void (*parent_reset)(CPUState *cpu); } RISCVCPUClass; /** * RISCVCPU: * @env: #CPURISCVState * * A RISCV CPU. */ typedef struct RISCVCPU { /*< private >*/ CPUState parent_obj; /*< public >*/ CPURISCVState env; } RISCVCPU; static inline RISCVCPU *riscv_env_get_cpu(CPURISCVState *env) { return container_of(env, RISCVCPU, env); } static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext) { return (env->misa & ext) != 0; } static inline bool riscv_feature(CPURISCVState *env, int feature) { return env->features & (1ULL << feature); } #include "cpu_user.h" #include "cpu_bits.h" extern const char * const riscv_int_regnames[]; extern const char * const riscv_fpr_regnames[]; extern const char * const riscv_excp_names[]; extern const char * const riscv_intr_names[]; #define ENV_GET_CPU(e) CPU(riscv_env_get_cpu(e)) #define ENV_OFFSET offsetof(RISCVCPU, env) void riscv_cpu_do_interrupt(CPUState *cpu); int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request); int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch); hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr, MMUAccessType access_type, int mmu_idx, uintptr_t retaddr); int riscv_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int size, int rw, int mmu_idx); char *riscv_isa_string(RISCVCPU *cpu); void riscv_cpu_list(FILE *f, fprintf_function cpu_fprintf); #define cpu_signal_handler cpu_riscv_signal_handler #define cpu_list riscv_cpu_list #define cpu_mmu_index riscv_cpu_mmu_index #ifndef CONFIG_USER_ONLY uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value); #define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */ #endif void riscv_set_mode(CPURISCVState *env, target_ulong newpriv); void riscv_translate_init(void); RISCVCPU *cpu_riscv_init(const char *cpu_model); int cpu_riscv_signal_handler(int host_signum, void *pinfo, void *puc); void QEMU_NORETURN do_raise_exception_err(CPURISCVState *env, uint32_t exception, uintptr_t pc); target_ulong cpu_riscv_get_fflags(CPURISCVState *env); void cpu_riscv_set_fflags(CPURISCVState *env, target_ulong); #define TB_FLAGS_MMU_MASK 3 #define TB_FLAGS_MSTATUS_FS MSTATUS_FS static inline void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc, target_ulong *cs_base, uint32_t *flags) { *pc = env->pc; *cs_base = 0; #ifdef CONFIG_USER_ONLY *flags = TB_FLAGS_MSTATUS_FS; #else *flags = cpu_mmu_index(env, 0) | (env->mstatus & MSTATUS_FS); #endif } int riscv_csrrw(CPURISCVState *env, int csrno, target_ulong *ret_value, target_ulong new_value, target_ulong write_mask); static inline void csr_write_helper(CPURISCVState *env, target_ulong val, int csrno) { riscv_csrrw(env, csrno, NULL, val, MAKE_64BIT_MASK(0, TARGET_LONG_BITS)); } static inline target_ulong csr_read_helper(CPURISCVState *env, int csrno) { target_ulong val = 0; riscv_csrrw(env, csrno, &val, 0, 0); return val; } typedef int (*riscv_csr_predicate_fn)(CPURISCVState *env, int csrno); typedef int (*riscv_csr_read_fn)(CPURISCVState *env, int csrno, target_ulong *ret_value); typedef int (*riscv_csr_write_fn)(CPURISCVState *env, int csrno, target_ulong new_value); typedef int (*riscv_csr_op_fn)(CPURISCVState *env, int csrno, target_ulong *ret_value, target_ulong new_value, target_ulong write_mask); typedef struct { riscv_csr_predicate_fn predicate; riscv_csr_read_fn read; riscv_csr_write_fn write; riscv_csr_op_fn op; } riscv_csr_operations; void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops); void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops); #include "exec/cpu-all.h" #endif /* RISCV_CPU_H */