registers.h

这个是LINUX下的GDB调度工具的源码

/* Register definitions for the FRV simulator
   Copyright (C) 2000 Free Software Foundation, Inc.
   Contributed by Red Hat.

This file is part of the GNU Simulators.

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, 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.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifndef REGISTERS_H
#define REGISTERS_H

#define FRV_MAX_GR  64
#define FRV_MAX_FR  64
#define FRV_MAX_CPR 64
#define FRV_MAX_SPR 4096

/* Register init, reset values and read_only masks.  */
typedef struct
{
  USI init_value;     /* initial value */
  USI reset_value;    /* value for software reset */
  USI reset_mask;     /* bits which are reset */
  USI read_only_mask; /* bits which are read-only */
  char implemented;   /* 1==register is implemented */
  char supervisor;    /* 1==register is supervisor-only */
} FRV_SPR_CONTROL_INFO;

typedef struct
{
  int fr;                    /* FR registers implemented */
  int cpr;                   /* coprocessor registers implemented */
  FRV_SPR_CONTROL_INFO *spr; /* SPR implementation details */
} FRV_REGISTER_CONTROL;

void frv_register_control_init (SIM_CPU *);
void frv_initialize_spr (SIM_CPU *);
void frv_reset_spr (SIM_CPU *);

void frv_check_spr_access (SIM_CPU *, UINT);

void frv_fr_registers_available (SIM_CPU *, int *, int *);
void frv_gr_registers_available (SIM_CPU *, int *, int *);
int  frv_check_register_access (SIM_CPU *, SI, int, int);
int  frv_check_gr_access (SIM_CPU *, SI);
int  frv_check_fr_access (SIM_CPU *, SI);

#endif /* REGISTERS_H */