qemu/target/riscv/cpu.h
Michael Clark 85ba724fd6
RISC-V: Allow setting and clearing multiple irqs
Change the API of riscv_set_local_interrupt to take a
write mask and value to allow setting and clearing of
multiple local interrupts atomically in a single call.
Rename the new function to riscv_cpu_update_mip.

Signed-off-by: Michael Clark <mjc@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-10-17 13:02:09 -07:00

299 lines
8.9 KiB
C

/*
* 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 <http://www.gnu.org/licenses/>.
*/
#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 */
enum {
RISCV_FEATURE_MMU
};
#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_FP_ENABLE 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_FP_ENABLE;
#else
*flags = cpu_mmu_index(env, 0) | (env->mstatus & MSTATUS_FS);
#endif
}
void csr_write_helper(CPURISCVState *env, target_ulong val_to_write,
target_ulong csrno);
target_ulong csr_read_helper(CPURISCVState *env, target_ulong csrno);
#include "exec/cpu-all.h"
#endif /* RISCV_CPU_H */