sim/ppc/emul_generic.h

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19     */
  20
  21
  22 #ifndef _EMUL_GENERIC_H_
  23 #define _EMUL_GENERIC_H_
  24
  25 #include "cpu.h"
  26 #include "idecode.h"
  27 #include "os_emul.h"
  28
  29 #include "bfd.h"
  30
  31 #ifndef INLINE_EMUL_GENERIC
  32 #define INLINE_EMUL_GENERIC
  33 #endif
  34
  35 /* various PowerPC instructions for writing into memory */
  36 enum {
  37   emul_call_instruction = 0x1,
  38   emul_loop_instruction = 0x48000000, /* branch to . */
  39   emul_rfi_instruction = 0x4c000064,
  40   emul_blr_instruction = 0x4e800020,
  41 };
  42
  43
  44 /* emulation specific data */
  45
  46 typedef struct _os_emul_data os_emul_data;
  47
  48 typedef os_emul_data *(os_emul_create_handler)
  49      (device *tree,
  50       bfd *image,
  51       const char *emul_name);
  52 typedef void (os_emul_init_handler)
  53      (os_emul_data *emul_data,
  54       int nr_cpus);
  55 typedef void (os_emul_system_call_handler)
  56      (cpu *processor,
  57       unsigned_word cia,
  58       os_emul_data *emul_data);
  59 typedef int (os_emul_instruction_call_handler)
  60      (cpu *processor,
  61       unsigned_word cia,
  62       unsigned_word ra,
  63       os_emul_data *emul_data);
  64
  65 struct _os_emul {
  66   const char *name;
  67   os_emul_create_handler *create;
  68   os_emul_init_handler *init;
  69   os_emul_system_call_handler *system_call;
  70   os_emul_instruction_call_handler *instruction_call;
  71   os_emul_data *data;
  72 };
  73
  74
  75 /* One class of emulation - system call is pretty general, provide a
  76    common template for implementing this */
  77
  78 typedef struct _emul_syscall emul_syscall;
  79 typedef struct _emul_syscall_descriptor emul_syscall_descriptor;
  80
  81 typedef void (emul_syscall_handler)
  82      (os_emul_data *emul_data,
  83       unsigned call,
  84       const int arg0,
  85       cpu *processor,
  86       unsigned_word cia);
  87
  88 struct _emul_syscall_descriptor {
  89   emul_syscall_handler *handler;
  90   const char *name;
  91 };
  92
  93 struct _emul_syscall {
  94   emul_syscall_descriptor *syscall_descriptor;
  95   int nr_system_calls;
  96   char **error_names;
  97   int nr_error_names;
  98   char **signal_names;
  99   int nr_signal_names;
 100 };
 101
 102
 103 INLINE_EMUL_GENERIC void emul_do_system_call
 104 (os_emul_data *emul_data,
 105  emul_syscall *syscall,
 106  unsigned call,
 107  const int arg0,
 108  cpu *processor,
 109  unsigned_word cia);
 110
 111
 112 INLINE_EMUL_GENERIC unsigned64 emul_read_gpr64
 113 (cpu *processor,
 114  int g);
 115
 116 INLINE_EMUL_GENERIC void emul_write_gpr64
 117 (cpu *processor,
 118  int g,
 119  unsigned64 val);
 120
 121 INLINE_EMUL_GENERIC void emul_write_status
 122 (cpu *processor,
 123  int status,
 124  int errno);
 125
 126 INLINE_EMUL_GENERIC char *emul_read_string
 127 (char *dest,
 128  unsigned_word addr,
 129  unsigned nr_bytes,
 130  cpu *processor,
 131  unsigned_word cia);
 132
 133 INLINE_EMUL_GENERIC unsigned_word emul_read_word
 134 (unsigned_word addr,
 135  cpu *processor,
 136  unsigned_word cia);
 137
 138 INLINE_EMUL_GENERIC void emul_write_word
 139 (unsigned_word addr,
 140  unsigned_word buf,
 141  cpu *processor,
 142  unsigned_word cia);
 143
 144 INLINE_EMUL_GENERIC void emul_read_buffer
 145 (void *dest,
 146  unsigned_word addr,
 147  unsigned nr_bytes,
 148  cpu *processor,
 149  unsigned_word cia);
 150
 151 INLINE_EMUL_GENERIC void emul_write_buffer
 152 (const void *source,
 153  unsigned_word addr,
 154  unsigned nr_bytes,
 155  cpu *processor,
 156  unsigned_word cia);
 157
 158 #endif /* _EMUL_GENERIC_H_ */