/*
* OpenRISC virtual CPU header.
*
* Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPENRISC_CPU_H
#define OPENRISC_CPU_H
#include "exec/cpu-defs.h"
#include "fpu/softfloat-types.h"
#include "hw/core/cpu.h"
#include "qom/object.h"
#define TCG_GUEST_DEFAULT_MO (0)
#define TYPE_OPENRISC_CPU "or1k-cpu"
OBJECT_DECLARE_CPU_TYPE(OpenRISCCPU, OpenRISCCPUClass, OPENRISC_CPU)
/**
* OpenRISCCPUClass:
* @parent_realize: The parent class' realize handler.
* @parent_reset: The parent class' reset handler.
*
* A OpenRISC CPU model.
*/
struct OpenRISCCPUClass {
/*< private >*/
CPUClass parent_class;
/*< public >*/
DeviceRealize parent_realize;
DeviceReset parent_reset;
};
#define TARGET_INSN_START_EXTRA_WORDS 1
enum {
MMU_NOMMU_IDX = 0,
MMU_SUPERVISOR_IDX = 1,
MMU_USER_IDX = 2,
};
#define SET_FP_CAUSE(reg, v) do {\
(reg) = ((reg) & ~(0x3f << 12)) | \
((v & 0x3f) << 12);\
} while (0)
#define GET_FP_ENABLE(reg) (((reg) >> 7) & 0x1f)
#define UPDATE_FP_FLAGS(reg, v) do {\
(reg) |= ((v & 0x1f) << 2);\
} while (0)
/* Interrupt */
#define NR_IRQS 32
/* Unit presece register */
enum {
UPR_UP = (1 << 0),
UPR_DCP = (1 << 1),
UPR_ICP = (1 << 2),
UPR_DMP = (1 << 3),
UPR_IMP = (1 << 4),
UPR_MP = (1 << 5),
UPR_DUP = (1 << 6),
UPR_PCUR = (1 << 7),
UPR_PMP = (1 << 8),
UPR_PICP = (1 << 9),
UPR_TTP = (1 << 10),
UPR_CUP = (255 << 24),
};
/* CPU configure register */
enum {
CPUCFGR_NSGF = (15 << 0),
CPUCFGR_CGF = (1 << 4),
CPUCFGR_OB32S = (1 << 5),
CPUCFGR_OB64S = (1 << 6),
CPUCFGR_OF32S = (1 << 7),
CPUCFGR_OF64S = (1 << 8),
CPUCFGR_OV64S = (1 << 9),
CPUCFGR_ND = (1 << 10),
CPUCFGR_AVRP = (1 << 11),
CPUCFGR_EVBARP = (1 << 12),
CPUCFGR_ISRP = (1 << 13),
CPUCFGR_AECSRP = (1 << 14),
CPUCFGR_OF64A32S = (1 << 15),
};
/* DMMU configure register */
enum {
DMMUCFGR_NTW = (3 << 0),
DMMUCFGR_NTS = (7 << 2),
DMMUCFGR_NAE = (7 << 5),
DMMUCFGR_CRI = (1 << 8),
DMMUCFGR_PRI = (1 << 9),
DMMUCFGR_TEIRI = (1 << 10),
DMMUCFGR_HTR = (1 << 11),
};
/* IMMU configure register */
enum {
IMMUCFGR_NTW = (3 << 0),
IMMUCFGR_NTS = (7 << 2),
IMMUCFGR_NAE = (7 << 5),
IMMUCFGR_CRI = (1 << 8),
IMMUCFGR_PRI = (1 << 9),
IMMUCFGR_TEIRI = (1 << 10),
IMMUCFGR_HTR = (1 << 11),
};
/* Power management register */
enum {
PMR_SDF = (15 << 0),
PMR_DME = (1 << 4),
PMR_SME = (1 << 5),
PMR_DCGE = (1 << 6),
PMR_SUME = (1 << 7),
};
/* Float point control status register */
enum {
FPCSR_FPEE = 1,
FPCSR_RM = (3 << 1),
FPCSR_OVF = (1 << 3),
FPCSR_UNF = (1 << 4),
FPCSR_SNF = (1 << 5),
FPCSR_QNF = (1 << 6),
FPCSR_ZF = (1 << 7),
FPCSR_IXF = (1 << 8),
FPCSR_IVF = (1 << 9),
FPCSR_INF = (1 << 10),
FPCSR_DZF = (1 << 11),
};
/* Exceptions indices */
enum {
EXCP_RESET = 0x1,
EXCP_BUSERR = 0x2,
EXCP_DPF = 0x3,
EXCP_IPF = 0x4,
EXCP_TICK = 0x5,
EXCP_ALIGN = 0x6,
EXCP_ILLEGAL = 0x7,
EXCP_INT = 0x8,
EXCP_DTLBMISS = 0x9,
EXCP_ITLBMISS = 0xa,
EXCP_RANGE = 0xb,
EXCP_SYSCALL = 0xc,
EXCP_FPE = 0xd,
EXCP_TRAP = 0xe,
EXCP_NR,
};
/* Supervisor register */
enum {
SR_SM = (1 << 0),
SR_TEE = (1 << 1),
SR_IEE = (1 << 2),
SR_DCE = (1 << 3),
SR_ICE = (1 << 4),
SR_DME = (1 << 5),
SR_IME = (1 << 6),
SR_LEE = (1 << 7),
SR_CE = (1 << 8),
SR_F = (1 << 9),
SR_CY = (1 << 10),
SR_OV = (1 << 11),
SR_OVE = (1 << 12),
SR_DSX = (1 << 13),
SR_EPH = (1 << 14),
SR_FO = (1 << 15),
SR_SUMRA = (1 << 16),
SR_SCE = (1 << 17),
};
/* Tick Timer Mode Register */
enum {
TTMR_TP = (0xfffffff),
TTMR_IP = (1 << 28),
TTMR_IE = (1 << 29),
TTMR_M = (3 << 30),
};
/* Timer Mode */
enum {
TIMER_NONE = (0 << 30),
TIMER_INTR = (1 << 30),
TIMER_SHOT = (2 << 30),
TIMER_CONT = (3 << 30),
};
/* TLB size */
enum {
TLB_SIZE = 128,
TLB_MASK = TLB_SIZE - 1,
};
/* TLB prot */
enum {
URE = (1 << 6),
UWE = (1 << 7),
SRE = (1 << 8),
SWE = (1 << 9),
SXE = (1 << 6),
UXE = (1 << 7),
};
typedef struct OpenRISCTLBEntry {
uint32_t mr;
uint32_t tr;
} OpenRISCTLBEntry;
#ifndef CONFIG_USER_ONLY
typedef struct CPUOpenRISCTLBContext {
OpenRISCTLBEntry itlb[TLB_SIZE];
OpenRISCTLBEntry dtlb[TLB_SIZE];
int (*cpu_openrisc_map_address_code)(OpenRISCCPU *cpu,
hwaddr *physical,
int *prot,
target_ulong address, int rw);
int (*cpu_openrisc_map_address_data)(OpenRISCCPU *cpu,
hwaddr *physical,
int *prot,
target_ulong address, int rw);
} CPUOpenRISCTLBContext;
#endif
typedef struct CPUArchState {
target_ulong shadow_gpr[16][32]; /* Shadow registers */
target_ulong pc; /* Program counter */
target_ulong ppc; /* Prev PC */
target_ulong jmp_pc; /* Jump PC */
uint64_t mac; /* Multiply registers MACHI:MACLO */
target_ulong epcr; /* Exception PC register */
target_ulong eear; /* Exception EA register */
target_ulong sr_f; /* the SR_F bit, values 0, 1. */
target_ulong sr_cy; /* the SR_CY bit, values 0, 1. */
target_long sr_ov; /* the SR_OV bit (in the sign bit only) */
uint32_t sr; /* Supervisor register, without SR_{F,CY,OV} */
uint32_t esr; /* Exception supervisor register */
uint32_t evbar; /* Exception vector base address register */
uint32_t pmr; /* Power Management Register */
uint32_t fpcsr; /* Float register */
float_status fp_status;
target_ulong lock_addr;
target_ulong lock_value;
uint32_t dflag; /* In delay slot (boolean) */
#ifndef CONFIG_USER_ONLY
CPUOpenRISCTLBContext tlb;
#endif
/* Fields up to this point are cleared by a CPU reset */
struct {} end_reset_fields;
/* Fields from here on are preserved across CPU reset. */
uint32_t vr; /* Version register */
uint32_t vr2; /* Version register 2 */
uint32_t avr; /* Architecture version register */
uint32_t upr; /* Unit presence register */
uint32_t cpucfgr; /* CPU configure register */
uint32_t dmmucfgr; /* DMMU configure register */
uint32_t immucfgr; /* IMMU configure register */
#ifndef CONFIG_USER_ONLY
QEMUTimer *timer;
uint32_t ttmr; /* Timer tick mode register */
int is_counting;
uint32_t picmr; /* Interrupt mask register */
uint32_t picsr; /* Interrupt contrl register*/
#endif
} CPUOpenRISCState;
/**
* OpenRISCCPU:
* @env: #CPUOpenRISCState
*
* A OpenRISC CPU.
*/
struct ArchCPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
CPUNegativeOffsetState neg;
CPUOpenRISCState env;
};
void cpu_openrisc_list(void);
void openrisc_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
hwaddr openrisc_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
int openrisc_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
int openrisc_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
void openrisc_translate_init(void);
int print_insn_or1k(bfd_vma addr, disassemble_info *info);
#define cpu_list cpu_openrisc_list
#ifndef CONFIG_USER_ONLY
bool openrisc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
extern const VMStateDescription vmstate_openrisc_cpu;
void openrisc_cpu_do_interrupt(CPUState *cpu);
bool openrisc_cpu_exec_interrupt(CPUState *cpu, int int_req);
/* hw/openrisc_pic.c */
void cpu_openrisc_pic_init(OpenRISCCPU *cpu);
/* hw/openrisc_timer.c */
void cpu_openrisc_clock_init(OpenRISCCPU *cpu);
uint32_t cpu_openrisc_count_get(OpenRISCCPU *cpu);
void cpu_openrisc_count_set(OpenRISCCPU *cpu, uint32_t val);
void cpu_openrisc_count_update(OpenRISCCPU *cpu);
void cpu_openrisc_timer_update(OpenRISCCPU *cpu);
void cpu_openrisc_count_start(OpenRISCCPU *cpu);
void cpu_openrisc_count_stop(OpenRISCCPU *cpu);
#endif
#define OPENRISC_CPU_TYPE_SUFFIX "-" TYPE_OPENRISC_CPU
#define OPENRISC_CPU_TYPE_NAME(model) model OPENRISC_CPU_TYPE_SUFFIX
#define CPU_RESOLVING_TYPE TYPE_OPENRISC_CPU
#include "exec/cpu-all.h"
#define TB_FLAGS_SM SR_SM
#define TB_FLAGS_DME SR_DME
#define TB_FLAGS_IME SR_IME
#define TB_FLAGS_OVE SR_OVE
#define TB_FLAGS_DFLAG 2 /* reuse SR_TEE */
#define TB_FLAGS_R0_0 4 /* reuse SR_IEE */
static inline uint32_t cpu_get_gpr(const CPUOpenRISCState *env, int i)
{
return env->shadow_gpr[0][i];
}
static inline void cpu_set_gpr(CPUOpenRISCState *env, int i, uint32_t val)
{
env->shadow_gpr[0][i] = val;
}
static inline void cpu_get_tb_cpu_state(CPUOpenRISCState *env,
target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->pc;
*cs_base = 0;
*flags = (env->dflag ? TB_FLAGS_DFLAG : 0)
| (cpu_get_gpr(env, 0) ? 0 : TB_FLAGS_R0_0)
| (env->sr & (SR_SM | SR_DME | SR_IME | SR_OVE));
}
static inline int cpu_mmu_index(CPUOpenRISCState *env, bool ifetch)
{
int ret = MMU_NOMMU_IDX; /* mmu is disabled */
if (env->sr & (ifetch ? SR_IME : SR_DME)) {
/* The mmu is enabled; test supervisor state. */
ret = env->sr & SR_SM ? MMU_SUPERVISOR_IDX : MMU_USER_IDX;
}
return ret;
}
static inline uint32_t cpu_get_sr(const CPUOpenRISCState *env)
{
return (env->sr
+ env->sr_f * SR_F
+ env->sr_cy * SR_CY
+ (env->sr_ov < 0) * SR_OV);
}
static inline void cpu_set_sr(CPUOpenRISCState *env, uint32_t val)
{
env->sr_f = (val & SR_F) != 0;
env->sr_cy = (val & SR_CY) != 0;
env->sr_ov = (val & SR_OV ? -1 : 0);
env->sr = (val & ~(SR_F | SR_CY | SR_OV)) | SR_FO;
}
void cpu_set_fpcsr(CPUOpenRISCState *env, uint32_t val);
#define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_INT_0
#endif /* OPENRISC_CPU_H */
