sim/tic80/sim-calls.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
   4     Copyright (C) 1997, Free Software Foundation
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19
  20     */
  21
  22
  23 #include <signal.h> /* FIXME - should be machine dependant version */
  24 #include <stdarg.h>
  25 #include <ctype.h>
  26
  27 #include "bfd.h"
  28 #include "sim-main.h"
  29 #include "sim-utils.h"
  30 #include "sim-options.h"
  31
  32 #ifdef HAVE_STDLIB_H
  33 #include <stdlib.h>
  34 #endif
  35
  36 #ifdef HAVE_STRING_H
  37 #include <string.h>
  38 #else
  39 #ifdef HAVE_STRINGS_H
  40 #include <strings.h>
  41 #endif
  42 #endif
  43
  44
  45 #define SIM_ADDR unsigned
  46
  47 /* Structures used by the simulator, for gdb just have static structures */
  48
  49 struct sim_state simulation = { 0 };
  50
  51
  52 SIM_DESC
  53 sim_open (SIM_OPEN_KIND kind, char **argv)
  54 {
  55   STATE_OPEN_KIND (&simulation) = kind;
  56
  57   /* establish the simulator configuration */
  58   sim_config (&simulation,
  59               LITTLE_ENDIAN/*d30v always big endian*/);
  60
  61   if (sim_pre_argv_init (&simulation, argv[0]) != SIM_RC_OK)
  62     return 0;
  63
  64   /* getopt will print the error message so we just have to exit if this fails.
  65      FIXME: Hmmm...  in the case of gdb we need getopt to call
  66      print_filtered.  */
  67   if (sim_parse_args (&simulation, argv) != SIM_RC_OK)
  68     {
  69       /* Uninstall the modules to avoid memory leaks,
  70          file descriptor leaks, etc.  */
  71       sim_module_uninstall (&simulation);
  72       return 0;
  73     }
  74
  75   if (sim_post_argv_init (&simulation) != SIM_RC_OK)
  76     {
  77       /* Uninstall the modules to avoid memory leaks,
  78          file descriptor leaks, etc.  */
  79       sim_module_uninstall (&simulation);
  80       return 0;
  81     }
  82
  83   engine_init(&simulation);
  84
  85 #define TIC80_MEM_START 0x2000000
  86 #define TIC80_MEM_SIZE 0x100000
  87
  88   /* external memory */
  89   sim_core_attach(&simulation,
  90                   attach_raw_memory,
  91                   access_read_write_exec,
  92                   0, TIC80_MEM_START, TIC80_MEM_SIZE, NULL, NULL);
  93   sim_core_attach(&simulation,
  94                   attach_raw_memory,
  95                   access_read_write_exec,
  96                   0, 0, TIC80_MEM_SIZE, NULL, NULL);
  97
  98  /* FIXME: for now */
  99   return (SIM_DESC) &simulation;
 100 }
 101
 102
 103 /* NOTE: sim_size is going away */
 104 void sim_size (int i);
 105 void
 106 sim_size (int i)
 107 {
 108   sim_io_error (NULL, "unexpected call to sim_size()");
 109 }
 110
 111
 112 void
 113 sim_close (SIM_DESC sd, int quitting)
 114 {
 115   /* Uninstall the modules to avoid memory leaks,
 116      file descriptor leaks, etc.  */
 117   sim_module_uninstall (&simulation);
 118 }
 119
 120
 121 SIM_RC
 122 sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
 123 {
 124   extern bfd *sim_load_file (); /* ??? Don't know where this should live.  */
 125   bfd *prog_bfd;
 126
 127   prog_bfd = sim_load_file (sd, STATE_MY_NAME (sd),
 128                             STATE_CALLBACK (sd),
 129                             prog,
 130                             /* pass NULL for abfd, we always open our own */
 131                             NULL,
 132                             STATE_OPEN_KIND (sd) == SIM_OPEN_DEBUG);
 133   if (prog_bfd == NULL)
 134     return SIM_RC_FAIL;
 135   sim_analyze_program (sd, prog_bfd);
 136   return SIM_RC_OK;
 137 }
 138
 139
 140 void
 141 sim_kill (SIM_DESC sd)
 142 {
 143 }
 144
 145
 146 int
 147 sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 148 {
 149   return sim_core_read_buffer (sd, sim_core_write_map,
 150                                buf, mem, length);
 151 }
 152
 153
 154 int
 155 sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 156 {
 157   return sim_core_write_buffer (sd, sim_core_write_map,
 158                                 buf, mem, length);
 159 }
 160
 161
 162 /* FIXME - these magic numbers need to be moved elsewhere */
 163
 164 #define SP_REGNUM 1             /* Contains address of top of stack */
 165 #define FP_REGNUM 31            /* Contains address of executing stack frame */
 166 #define PC_REGNUM 32            /* Contains program counter (FIXME?) */
 167 #define NPC_REGNUM 33           /* Contains the next program counter (FIXME?) */
 168 #define A0_REGNUM 34            /* Accumulator register 0 */
 169 #define A3_REGNUM 37            /* Accumulator register 1 */
 170
 171 #define R0_REGNUM 0             /* General Purpose Register 0 - for sim */
 172 #define Rn_REGNUM 31            /* Last General Purpose Register - for sim */
 173 #define An_REGNUM A3_REGNUM     /* Last Accumulator register - for sim */
 174
 175 void
 176 sim_fetch_register (SIM_DESC sd, int regnr, unsigned char *buf)
 177 {
 178   if (regnr >= R0_REGNUM && regnr <= Rn_REGNUM)
 179     *(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->reg[regnr - A0_REGNUM]);
 180   else if (regnr == PC_REGNUM)
 181     *(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->cia.ip);
 182   else if (regnr == NPC_REGNUM)
 183     *(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->cia.dp);
 184   else if (regnr >= A0_REGNUM && regnr <= An_REGNUM)
 185     *(unsigned64*)buf = H2T_8 (STATE_CPU (sd, 0)->acc[regnr - A0_REGNUM]);
 186   else
 187     sim_io_error (sd, "sim_fetch_register - unknown register nr %d", regnr);
 188   return;
 189 }
 190
 191
 192 void
 193 sim_store_register (SIM_DESC sd, int regnr, unsigned char *buf)
 194 {
 195   if (regnr >= R0_REGNUM && regnr <= Rn_REGNUM)
 196     STATE_CPU (sd, 0)->reg[regnr - A0_REGNUM] = T2H_4 (*(unsigned32*)buf);
 197   else if (regnr == PC_REGNUM)
 198     STATE_CPU (sd, 0)->cia.ip = T2H_4 (*(unsigned32*)buf);
 199   else if (regnr == NPC_REGNUM)
 200     STATE_CPU (sd, 0)->cia.dp = T2H_4 (*(unsigned32*)buf);
 201   else if (regnr == A0_REGNUM && regnr <= An_REGNUM)
 202     STATE_CPU (sd, 0)->acc[regnr - A0_REGNUM] = H2T_8 (*(unsigned64*)buf);
 203   else
 204     sim_io_error (sd, "sim_fetch_register - unknown register nr %d", regnr);
 205   return;
 206 }
 207
 208
 209 void
 210 sim_info (SIM_DESC sd, int verbose)
 211 {
 212 }
 213
 214
 215 SIM_RC
 216 sim_create_inferior (SIM_DESC sd,
 217                      char **argv,
 218                      char **envp)
 219 {
 220   STATE_CPU (sd, 0)->cia.ip = STATE_START_ADDR(sd);
 221   STATE_CPU (sd, 0)->cia.dp = (STATE_START_ADDR(sd)
 222                                + sizeof (instruction_word));
 223   STATE_CPU (sd, 0)->reg[1] = TIC80_MEM_START + TIC80_MEM_SIZE - 16;
 224   return SIM_RC_OK;
 225 }
 226
 227
 228 volatile int keep_running = 1;
 229
 230 void
 231 sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
 232 {
 233   *reason = simulation.reason;
 234   *sigrc = simulation.siggnal;
 235   keep_running = 1; /* ready for next run */
 236 }
 237
 238
 239 int
 240 sim_stop (SIM_DESC sd)
 241 {
 242   keep_running = 0;
 243   return 1;
 244 }
 245
 246 void
 247 sim_resume (SIM_DESC sd, int step, int siggnal)
 248 {
 249   /* keep_running = 1 - in sim_stop_reason */
 250   if (step)
 251     keep_running = 0;
 252   engine_run_until_stop(sd, &keep_running);
 253 }
 254
 255 void
 256 sim_do_command (SIM_DESC sd, char *cmd)
 257 {
 258   sim_io_error (sd, "sim_do_command - unimplemented");
 259 }
 260
 261
 262 void
 263 sim_set_callbacks (SIM_DESC sd, host_callback *callback)
 264 {
 265   STATE_CALLBACK (&simulation) = callback;
 266 }