Subversion Repositories openrisc_2011-10-31

/*

 * This file is part of SIS.

 *

 * ERC32SIM, SPARC instruction simulator. Copyright (C) 1995 Jiri Gaisler,

 * European Space Agency

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License as published by the Free

 * Software Foundation; either version 2 of the License, or (at your option)

 * any later version.

 *

 * This program 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 General Public License for

 * more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program; if not, write to the Free Software Foundation, Inc., 675

 * Mass Ave, Cambridge, MA 02139, USA.

 *

 */

#include "ansidecl.h"

#include "gdb/callback.h"

#include "gdb/remote-sim.h"

#include "end.h"

#define I_ACC_EXC 1

/* Maximum events in event queue */

#define EVENT_MAX       256

/* Maximum # of floating point queue */

#define FPUQN   1

/* Maximum # of breakpoints */

#define BPT_MAX 256

struct histype {

    unsigned        addr;

    unsigned        time;

};

/* type definitions */

typedef short int int16;        /* 16-bit signed int */

typedef unsigned short int uint16;      /* 16-bit unsigned int */

typedef int     int32;          /* 32-bit signed int */

typedef unsigned int uint32;    /* 32-bit unsigned int */

typedef float   float32;        /* 32-bit float */

typedef double  float64;        /* 64-bit float */

/* FIXME: what about host compilers that don't support 64-bit ints? */

typedef unsigned long long uint64; /* 64-bit unsigned int */

typedef long long int64;        /* 64-bit signed int */

struct pstate {

    float64         fd[16];     /* FPU registers */

#ifdef HOST_LITTLE_ENDIAN_FLOAT

    float32         fs[32];

    float32        *fdp;

#else

    float32        *fs;

#endif

    int32          *fsi;

    uint32          fsr;

    int32           fpstate;

    uint32          fpq[FPUQN * 2];

    uint32          fpqn;

    uint32          ftime;

    uint32          flrd;

    uint32          frd;

    uint32          frs1;

    uint32          frs2;

    uint32          fpu_pres;   /* FPU present (0 = No, 1 = Yes) */

    uint32          psr;        /* IU registers */

    uint32          tbr;

    uint32          wim;

    uint32          g[8];

    uint32          r[128];

    uint32          y;

    uint32          asr17;      /* Single vector trapping */

    uint32          pc, npc;

    uint32          trap;       /* Current trap type */

    uint32          annul;      /* Instruction annul */

    uint32          data;       /* Loaded data       */

    uint32          inst;       /* Current instruction */

    uint32          asi;        /* Current ASI */

    uint32          err_mode;   /* IU error mode */

    uint32          breakpoint;

    uint32          bptnum;

    uint32          bphit;

    uint32          bpts[BPT_MAX];      /* Breakpoints */

    uint32          ltime;      /* Load interlock time */

    uint32          hold;       /* IU hold cycles in current inst */

    uint32          fhold;      /* FPU hold cycles in current inst */

    uint32          icnt;       /* Instruction cycles in curr inst */

    uint32          histlen;    /* Trace history management */

    uint32          histind;

    struct histype *histbuf;

    float32         freq;       /* Simulated processor frequency */

    uint32          tottime;

    uint32          ninst;

    uint32          fholdt;

    uint32          holdt;

    uint32          icntt;

    uint32          finst;

    uint32          simstart;

    uint32          starttime;

    uint32          tlimit;     /* Simulation time limit */

    uint32          pwdtime;    /* Cycles in power-down mode */

    uint32          nstore;     /* Number of load instructions */

    uint32          nload;      /* Number of store instructions */

    uint32          nannul;     /* Number of annuled instructions */

    uint32          nbranch;    /* Number of branch instructions */

    uint32          ildreg;     /* Destination of last load instruction */

    uint32          ildtime;    /* Last time point for load dependency */

    int             rett_err;   /* IU in jmpl/restore error state (Rev.0) */

    int             jmpltime;

};

struct evcell {

    void            (*cfunc) ();

    int32           arg;

    uint32          time;

    struct evcell  *nxt;

};

struct estate {

    struct evcell   eq;

    struct evcell  *freeq;

    uint32          simtime;

};

struct irqcell {

    void            (*callback) ();

    int32           arg;

};

#define OK 0

#define TIME_OUT 1

#define BPT_HIT 2

#define ERROR 3

#define CTRL_C 4

/* Prototypes  */

/* erc32.c */

extern void     init_sim PARAMS ((void));

extern void     reset PARAMS ((void));

extern void     error_mode PARAMS ((uint32 pc));

extern void     sim_halt PARAMS ((void));

extern void     exit_sim PARAMS ((void));

extern void     init_stdio PARAMS ((void));

extern void     restore_stdio PARAMS ((void));

extern int      memory_read PARAMS ((int32 asi, uint32 addr, uint32 *data,

                                     int32 sz, int32 *ws));

extern int      memory_write PARAMS ((int32 asi, uint32 addr, uint32 *data,

                                    int32 sz, int32 *ws));

extern int      sis_memory_write PARAMS ((uint32 addr, char *data,

                                          uint32 length));

extern int      sis_memory_read PARAMS ((uint32 addr, char *data,

                                         uint32 length));

/* func.c */

extern void     set_regi PARAMS ((struct pstate *sregs, int32 reg,

                                  uint32 rval));

extern void     get_regi PARAMS ((struct pstate *sregs, int32 reg, char *buf));

extern int      exec_cmd PARAMS ((struct pstate *sregs, char *cmd));

extern void     reset_stat PARAMS ((struct pstate  *sregs));

extern void     show_stat PARAMS ((struct pstate  *sregs));

extern void     init_bpt PARAMS ((struct pstate  *sregs));

extern void     init_signals PARAMS ((void));

struct disassemble_info;

extern void     dis_mem PARAMS ((uint32 addr, uint32 len,

                                 struct disassemble_info *info));

extern void     event PARAMS ((void (*cfunc) (), int32 arg, uint32 delta));

extern void     set_int PARAMS ((int32 level, void (*callback) (), int32 arg));

extern void     advance_time PARAMS ((struct pstate  *sregs));

extern uint32   now PARAMS ((void));

extern int      wait_for_irq PARAMS ((void));

extern int      check_bpt PARAMS ((struct pstate *sregs));

extern void     reset_all PARAMS ((void));

extern void     sys_reset PARAMS ((void));

extern void     sys_halt PARAMS ((void));

extern int      bfd_load PARAMS ((char *fname));

/* exec.c */

extern int      dispatch_instruction PARAMS ((struct pstate *sregs));

extern int      execute_trap PARAMS ((struct pstate *sregs));

extern int      check_interrupts PARAMS ((struct pstate  *sregs));

extern void     init_regs PARAMS ((struct pstate *sregs));

/* interf.c */

extern int      run_sim PARAMS ((struct pstate *sregs,

                                 unsigned int icount, int dis));

/* float.c */

extern int      get_accex PARAMS ((void));

extern void     clear_accex PARAMS ((void));

extern void     set_fsr PARAMS ((uint32 fsr));

/* help.c */

extern void     usage PARAMS ((void));

extern void     gen_help PARAMS ((void));