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/*  This file is part of the program psim.

    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>

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

    */

#ifndef _EMUL_GENERIC_H_

#define _EMUL_GENERIC_H_

#include "cpu.h"

#include "idecode.h"

#include "os_emul.h"

#include "tree.h"

#include "bfd.h"

#ifndef INLINE_EMUL_GENERIC

#define INLINE_EMUL_GENERIC

#endif

/* various PowerPC instructions for writing into memory */

enum {

  emul_call_instruction = 0x1,

  emul_loop_instruction = 0x48000000, /* branch to . */

  emul_rfi_instruction = 0x4c000064,

  emul_blr_instruction = 0x4e800020,

};

/* emulation specific data */

typedef struct _os_emul_data os_emul_data;

typedef os_emul_data *(os_emul_create_handler)

     (device *tree,

      bfd *image,

      const char *emul_name);

typedef void (os_emul_init_handler)

     (os_emul_data *emul_data,

      int nr_cpus);

typedef void (os_emul_system_call_handler)

     (cpu *processor,

      unsigned_word cia,

      os_emul_data *emul_data);

typedef int (os_emul_instruction_call_handler)

     (cpu *processor,

      unsigned_word cia,

      unsigned_word ra,

      os_emul_data *emul_data);

struct _os_emul {

  const char *name;

  os_emul_create_handler *create;

  os_emul_init_handler *init;

  os_emul_system_call_handler *system_call;

  os_emul_instruction_call_handler *instruction_call;

  os_emul_data *data;

};

/* One class of emulation - system call is pretty general, provide a

   common template for implementing this */

typedef struct _emul_syscall emul_syscall;

typedef struct _emul_syscall_descriptor emul_syscall_descriptor;

typedef void (emul_syscall_handler)

     (os_emul_data *emul_data,

      unsigned call,

      const int arg0,

      cpu *processor,

      unsigned_word cia);

struct _emul_syscall_descriptor {

  emul_syscall_handler *handler;

  const char *name;

};

struct _emul_syscall {

  emul_syscall_descriptor *syscall_descriptor;

  int nr_system_calls;

  char **error_names;

  int nr_error_names;

  char **signal_names;

  int nr_signal_names;

};

INLINE_EMUL_GENERIC void emul_do_system_call

(os_emul_data *emul_data,

 emul_syscall *syscall,

 unsigned call,

 const int arg0,

 cpu *processor,

 unsigned_word cia);

INLINE_EMUL_GENERIC unsigned64 emul_read_gpr64

(cpu *processor,

 int g);

INLINE_EMUL_GENERIC void emul_write_gpr64

(cpu *processor,

 int g,

 unsigned64 val);

INLINE_EMUL_GENERIC void emul_write_status

(cpu *processor,

 int status,

 int errno);

INLINE_EMUL_GENERIC void emul_write2_status

(cpu *processor,

 int status1,

 int status2,

 int errno);

INLINE_EMUL_GENERIC char *emul_read_string

(char *dest,

 unsigned_word addr,

 unsigned nr_bytes,

 cpu *processor,

 unsigned_word cia);

INLINE_EMUL_GENERIC unsigned_word emul_read_word

(unsigned_word addr,

 cpu *processor,

 unsigned_word cia);

INLINE_EMUL_GENERIC void emul_write_word

(unsigned_word addr,

 unsigned_word buf,

 cpu *processor,

 unsigned_word cia);

INLINE_EMUL_GENERIC void emul_read_buffer

(void *dest,

 unsigned_word addr,

 unsigned nr_bytes,

 cpu *processor,

 unsigned_word cia);

INLINE_EMUL_GENERIC void emul_write_buffer

(const void *source,

 unsigned_word addr,

 unsigned nr_bytes,

 cpu *processor,

 unsigned_word cia);

/* Simplify the construction of device trees */

INLINE_EMUL_GENERIC void emul_add_tree_options

(device *tree,

 bfd *image,

 const char *emul,

 const char *env,

 int oea_interrupt_prefix);

INLINE_EMUL_GENERIC void emul_add_tree_hardware

(device *tree);

#endif /* _EMUL_GENERIC_H_ */