gnu/dist/gdb6/sim/ppc/emul_generic.h

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1996, 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 "tree.h"
  30
  31 #include "bfd.h"
  32
  33 #ifndef INLINE_EMUL_GENERIC
  34 #define INLINE_EMUL_GENERIC
  35 #endif
  36
  37 /* various PowerPC instructions for writing into memory */
  38 enum {
  39   emul_call_instruction = 0x1,
  40   emul_loop_instruction = 0x48000000, /* branch to . */
  41   emul_rfi_instruction = 0x4c000064,
  42   emul_blr_instruction = 0x4e800020,
  43 };
  44
  45
  46 /* emulation specific data */
  47
  48 typedef struct _os_emul_data os_emul_data;
  49
  50 typedef os_emul_data *(os_emul_create_handler)
  51      (device *tree,
  52       bfd *image,
  53       const char *emul_name);
  54 typedef void (os_emul_init_handler)
  55      (os_emul_data *emul_data,
  56       int nr_cpus);
  57 typedef void (os_emul_system_call_handler)
  58      (cpu *processor,
  59       unsigned_word cia,
  60       os_emul_data *emul_data);
  61 typedef int (os_emul_instruction_call_handler)
  62      (cpu *processor,
  63       unsigned_word cia,
  64       unsigned_word ra,
  65       os_emul_data *emul_data);
  66
  67 struct _os_emul {
  68   const char *name;
  69   os_emul_create_handler *create;
  70   os_emul_init_handler *init;
  71   os_emul_system_call_handler *system_call;
  72   os_emul_instruction_call_handler *instruction_call;
  73   os_emul_data *data;
  74 };
  75
  76
  77 /* One class of emulation - system call is pretty general, provide a
  78    common template for implementing this */
  79
  80 typedef struct _emul_syscall emul_syscall;
  81 typedef struct _emul_syscall_descriptor emul_syscall_descriptor;
  82
  83 typedef void (emul_syscall_handler)
  84      (os_emul_data *emul_data,
  85       unsigned call,
  86       const int arg0,
  87       cpu *processor,
  88       unsigned_word cia);
  89
  90 struct _emul_syscall_descriptor {
  91   emul_syscall_handler *handler;
  92   const char *name;
  93 };
  94
  95 struct _emul_syscall {
  96   emul_syscall_descriptor *syscall_descriptor;
  97   int nr_system_calls;
  98   char **error_names;
  99   int nr_error_names;
 100   char **signal_names;
 101   int nr_signal_names;
 102 };
 103
 104
 105 INLINE_EMUL_GENERIC void emul_do_system_call
 106 (os_emul_data *emul_data,
 107  emul_syscall *syscall,
 108  unsigned call,
 109  const int arg0,
 110  cpu *processor,
 111  unsigned_word cia);
 112
 113
 114 INLINE_EMUL_GENERIC unsigned64 emul_read_gpr64
 115 (cpu *processor,
 116  int g);
 117
 118 INLINE_EMUL_GENERIC void emul_write_gpr64
 119 (cpu *processor,
 120  int g,
 121  unsigned64 val);
 122
 123 INLINE_EMUL_GENERIC void emul_write_status
 124 (cpu *processor,
 125  int status,
 126  int errno);
 127
 128 INLINE_EMUL_GENERIC void emul_write2_status
 129 (cpu *processor,
 130  int status1,
 131  int status2,
 132  int errno);
 133
 134 INLINE_EMUL_GENERIC char *emul_read_string
 135 (char *dest,
 136  unsigned_word addr,
 137  unsigned nr_bytes,
 138  cpu *processor,
 139  unsigned_word cia);
 140
 141 INLINE_EMUL_GENERIC unsigned_word emul_read_word
 142 (unsigned_word addr,
 143  cpu *processor,
 144  unsigned_word cia);
 145
 146 INLINE_EMUL_GENERIC void emul_write_word
 147 (unsigned_word addr,
 148  unsigned_word buf,
 149  cpu *processor,
 150  unsigned_word cia);
 151
 152 INLINE_EMUL_GENERIC void emul_read_buffer
 153 (void *dest,
 154  unsigned_word addr,
 155  unsigned nr_bytes,
 156  cpu *processor,
 157  unsigned_word cia);
 158
 159 INLINE_EMUL_GENERIC void emul_write_buffer
 160 (const void *source,
 161  unsigned_word addr,
 162  unsigned nr_bytes,
 163  cpu *processor,
 164  unsigned_word cia);
 165
 166 /* Simplify the construction of device trees */
 167
 168 INLINE_EMUL_GENERIC void emul_add_tree_options
 169 (device *tree,
 170  bfd *image,
 171  const char *emul,
 172  const char *env,
 173  int oea_interrupt_prefix);
 174
 175 INLINE_EMUL_GENERIC void emul_add_tree_hardware
 176 (device *tree);
 177
 178 #endif /* _EMUL_GENERIC_H_ */