Archipelago » qemu

#if !defined (__MIPS_CPU_H__)

#define __MIPS_CPU_H__

#define TARGET_HAS_ICE 1

#include "config.h"

#include "mips-defs.h"

#include "cpu-defs.h"

#include "softfloat.h"

typedef union fpr_t fpr_t;

union fpr_t {

    float64  fd;   /* ieee double precision */

    float32  fs[2];/* ieee single precision */

    uint64_t d;    /* binary single fixed-point */

    uint32_t w[2]; /* binary single fixed-point */

};

/* define FP_ENDIAN_IDX to access the same location

 * in the fpr_t union regardless of the host endianess

 */

#if defined(WORDS_BIGENDIAN)

#  define FP_ENDIAN_IDX 1

#else

#  define FP_ENDIAN_IDX 0

#endif

#if defined(MIPS_USES_R4K_TLB)

typedef struct tlb_t tlb_t;

struct tlb_t {

    target_ulong VPN;

    target_ulong end;

    target_ulong end2;

    uint_fast8_t ASID;

    uint_fast16_t G:1;

    uint_fast16_t C0:3;

    uint_fast16_t C1:3;

    uint_fast16_t V0:1;

    uint_fast16_t V1:1;

    uint_fast16_t D0:1;

    uint_fast16_t D1:1;

    target_ulong PFN[2];

};

#endif

typedef struct CPUMIPSState CPUMIPSState;

struct CPUMIPSState {

    /* General integer registers */

    target_ulong gpr[32];

    /* Special registers */

    target_ulong PC;

    uint32_t HI, LO;

    uint32_t DCR; /* ? */

#if defined(MIPS_USES_FPU)

    /* Floating point registers */

    fpr_t fpr[16];

#define FPR(cpu, n) ((fpr_t*)&(cpu)->fpr[(n) / 2])

#define FPR_FD(cpu, n) (FPR(cpu, n)->fd)

#define FPR_FS(cpu, n) (FPR(cpu, n)->fs[((n) & 1) ^ FP_ENDIAN_IDX])

#define FPR_D(cpu, n)  (FPR(cpu, n)->d)

#define FPR_W(cpu, n)  (FPR(cpu, n)->w[((n) & 1) ^ FP_ENDIAN_IDX])

#ifndef USE_HOST_FLOAT_REGS

    fpr_t ft0;

    fpr_t ft1;

    fpr_t ft2;

#endif

    float_status fp_status;

    /* fpu implementation/revision register */

    uint32_t fcr0;

    /* fcsr */

    uint32_t fcr31;

#define SET_FP_COND(reg)     do { (reg) |= (1<<23); } while(0)

#define CLEAR_FP_COND(reg)   do { (reg) &= ~(1<<23); } while(0)

#define IS_FP_COND_SET(reg)  (((reg) & (1<<23)) != 0)

#define GET_FP_CAUSE(reg)    (((reg) >> 12) & 0x3f)

#define GET_FP_ENABLE(reg)   (((reg) >>  7) & 0x1f)

#define GET_FP_FLAGS(reg)    (((reg) >>  2) & 0x1f)

#define SET_FP_CAUSE(reg,v)  do { (reg) = ((reg) & ~(0x3f << 12)) | ((v) << 12); } while(0)

#define SET_FP_ENABLE(reg,v) do { (reg) = ((reg) & ~(0x1f <<  7)) | ((v) << 7); } while(0)

#define SET_FP_FLAGS(reg,v)  do { (reg) = ((reg) & ~(0x1f <<  2)) | ((v) << 2); } while(0)

#define FP_INEXACT        1

#define FP_UNDERFLOW      2

#define FP_OVERFLOW       4

#define FP_DIV0           8

#define FP_INVALID        16

#define FP_UNIMPLEMENTED  32

#endif

#if defined(MIPS_USES_R4K_TLB)

    tlb_t tlb[MIPS_TLB_NB];

#endif

    uint32_t CP0_index;

    uint32_t CP0_random;

    uint32_t CP0_EntryLo0;

    uint32_t CP0_EntryLo1;

    uint32_t CP0_Context;

    uint32_t CP0_PageMask;

    uint32_t CP0_Wired;

    uint32_t CP0_BadVAddr;

    uint32_t CP0_Count;

    uint32_t CP0_EntryHi;

    uint32_t CP0_Compare;

    uint32_t CP0_Status;

#define CP0St_CU3   31

#define CP0St_CU2   30

#define CP0St_CU1   29

#define CP0St_CU0   28

#define CP0St_RP    27

#define CP0St_FR    26

#define CP0St_RE    25

#define CP0St_BEV   22

#define CP0St_TS    21

#define CP0St_SR    20

#define CP0St_NMI   19

#define CP0St_IM    8

#define CP0St_UM    4

#define CP0St_ERL   2

#define CP0St_EXL   1

#define CP0St_IE    0

    uint32_t CP0_Cause;

#define CP0Ca_IV   23

    uint32_t CP0_EPC;

    uint32_t CP0_PRid;

    uint32_t CP0_Config0;

#define CP0C0_M    31

#define CP0C0_K23  28

#define CP0C0_KU   25

#define CP0C0_MDU  20

#define CP0C0_MM   17

#define CP0C0_BM   16

#define CP0C0_BE   15

#define CP0C0_AT   13

#define CP0C0_AR   10

#define CP0C0_MT   7

#define CP0C0_K0   0

    uint32_t CP0_Config1;

#define CP0C1_MMU  25

#define CP0C1_IS   22

#define CP0C1_IL   19

#define CP0C1_IA   16

#define CP0C1_DS   13

#define CP0C1_DL   10

#define CP0C1_DA   7

#define CP0C1_PC   4

#define CP0C1_WR   3

#define CP0C1_CA   2

#define CP0C1_EP   1

#define CP0C1_FP   0

    uint32_t CP0_LLAddr;

    uint32_t CP0_WatchLo;

    uint32_t CP0_WatchHi;

    uint32_t CP0_Debug;

#define CPDB_DBD   31

#define CP0DB_DM   30

#define CP0DB_LSNM 28

#define CP0DB_Doze 27

#define CP0DB_Halt 26

#define CP0DB_CNT  25

#define CP0DB_IBEP 24

#define CP0DB_DBEP 21

#define CP0DB_IEXI 20

#define CP0DB_VER  15

#define CP0DB_DEC  10

#define CP0DB_SSt  8

#define CP0DB_DINT 5

#define CP0DB_DIB  4

#define CP0DB_DDBS 3

#define CP0DB_DDBL 2

#define CP0DB_DBp  1

#define CP0DB_DSS  0

    uint32_t CP0_DEPC;

    uint32_t CP0_TagLo;

    uint32_t CP0_DataLo;

    uint32_t CP0_ErrorEPC;

    uint32_t CP0_DESAVE;

    /* Qemu */

    struct QEMUTimer *timer; /* Internal timer */

    int interrupt_request;

    jmp_buf jmp_env;

    int exception_index;

    int error_code;

    int user_mode_only; /* user mode only simulation */

    uint32_t hflags;    /* CPU State */

    /* TMASK defines different execution modes */

#define MIPS_HFLAG_TMASK  0x007F

#define MIPS_HFLAG_MODE   0x001F /* execution modes                    */

#define MIPS_HFLAG_UM     0x0001 /* user mode                          */

#define MIPS_HFLAG_ERL    0x0002 /* Error mode                         */

#define MIPS_HFLAG_EXL    0x0004 /* Exception mode                     */

#define MIPS_HFLAG_DM     0x0008 /* Debug mode                         */

#define MIPS_HFLAG_SM     0x0010 /* Supervisor mode                    */

#define MIPS_HFLAG_RE     0x0040 /* Reversed endianness                */

    /* If translation is interrupted between the branch instruction and

     * the delay slot, record what type of branch it is so that we can

     * resume translation properly.  It might be possible to reduce

     * this from three bits to two.  */

#define MIPS_HFLAG_BMASK  0x0380

#define MIPS_HFLAG_B      0x0080 /* Unconditional branch               */

#define MIPS_HFLAG_BC     0x0100 /* Conditional branch                 */

#define MIPS_HFLAG_BL     0x0180 /* Likely branch                      */

#define MIPS_HFLAG_BR     0x0200 /* branch to register (can't link TB) */

    target_ulong btarget;        /* Jump / branch target               */

    int bcond;                   /* Branch condition (if needed)       */

    int halted; /* TRUE if the CPU is in suspend state */

    CPU_COMMON

};

#include "cpu-all.h"

/* Memory access type :

 * may be needed for precise access rights control and precise exceptions.

 */

enum {

    /* 1 bit to define user level / supervisor access */

    ACCESS_USER  = 0x00,

    ACCESS_SUPER = 0x01,

    /* 1 bit to indicate direction */

    ACCESS_STORE = 0x02,

    /* Type of instruction that generated the access */

    ACCESS_CODE  = 0x10, /* Code fetch access                */

    ACCESS_INT   = 0x20, /* Integer load/store access        */

    ACCESS_FLOAT = 0x30, /* floating point load/store access */

};

/* Exceptions */

enum {

    EXCP_NONE          = -1,

    EXCP_RESET         = 0,

    EXCP_SRESET,

    EXCP_DSS,

    EXCP_DINT,

    EXCP_NMI,

    EXCP_MCHECK,

    EXCP_EXT_INTERRUPT,

    EXCP_DFWATCH,

    EXCP_DIB, /* 8 */

    EXCP_IWATCH,

    EXCP_AdEL,

    EXCP_AdES,

    EXCP_TLBF,

    EXCP_IBE,

    EXCP_DBp,

    EXCP_SYSCALL,

    EXCP_BREAK, /* 16 */

    EXCP_CpU,

    EXCP_RI,

    EXCP_OVERFLOW,

    EXCP_TRAP,

    EXCP_DDBS,

    EXCP_DWATCH,

    EXCP_LAE,

    EXCP_SAE, /* 24 */

    EXCP_LTLBL,

    EXCP_TLBL,

    EXCP_TLBS,

    EXCP_DBE,

    EXCP_DDBL,

    EXCP_MTCP0         = 0x104, /* mtmsr instruction:               */

                                /* may change privilege level       */

    EXCP_BRANCH        = 0x108, /* branch instruction               */

    EXCP_ERET          = 0x10C, /* return from interrupt            */

    EXCP_SYSCALL_USER  = 0x110, /* System call in user mode only    */

    EXCP_FLUSH         = 0x109,

};

int cpu_mips_exec(CPUMIPSState *s);

CPUMIPSState *cpu_mips_init(void);

uint32_t cpu_mips_get_clock (void);

#endif /* !defined (__MIPS_CPU_H__) */