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, struct host_callback_struct *callback, char **argv)
  54 {
  55   SIM_DESC sd = &simulation;
  56   STATE_OPEN_KIND (sd) = kind;
  57   STATE_MAGIC (sd) = SIM_MAGIC_NUMBER;
  58   STATE_CALLBACK (&simulation) = callback;
  59
  60   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  61     return 0;
  62
  63   /* getopt will print the error message so we just have to exit if this fails.
  64      FIXME: Hmmm...  in the case of gdb we need getopt to call
  65      print_filtered.  */
  66   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  67     {
  68       /* Uninstall the modules to avoid memory leaks,
  69          file descriptor leaks, etc.  */
  70       sim_module_uninstall (sd);
  71       return 0;
  72     }
  73
  74   if (sim_post_argv_init (sd) != SIM_RC_OK)
  75     {
  76       /* Uninstall the modules to avoid memory leaks,
  77          file descriptor leaks, etc.  */
  78       sim_module_uninstall (sd);
  79       return 0;
  80     }
  81
  82   /* Initialize the main processor */
  83   memset (&STATE_CPU (sd, 0)->reg, 0, sizeof STATE_CPU (sd, 0)->reg);
  84   memset (&STATE_CPU (sd, 0)->acc, 0, sizeof STATE_CPU (sd, 0)->acc);
  85   memset (&STATE_CPU (sd, 0)->cr, 0, sizeof STATE_CPU (sd, 0)->cr);
  86   STATE_CPU (sd, 0)->is_user_mode = 0;
  87   memset (&STATE_CPU (sd, 0)->cia, 0, sizeof STATE_CPU (sd, 0)->cia);
  88   CPU_STATE (STATE_CPU (sd, 0)) = sd;
  89
  90   /* establish the simulator configuration */
  91   sim_config (sd, LITTLE_ENDIAN/*d30v always big endian*/);
  92
  93 #define TIC80_MEM_START 0x2000000
  94 #define TIC80_MEM_SIZE 0x100000
  95
  96   /* external memory */
  97   sim_core_attach(sd,
  98                   NULL,
  99                   attach_raw_memory,
 100                   access_read_write_exec,
 101                   0, TIC80_MEM_START, TIC80_MEM_SIZE, NULL, NULL);
 102   sim_core_attach(sd,
 103                   NULL,
 104                   attach_raw_memory,
 105                   access_read_write_exec,
 106                   0, 0, TIC80_MEM_SIZE, NULL, NULL);
 107
 108  /* FIXME: for now */
 109   return sd;
 110 }
 111
 112
 113 /* NOTE: sim_size is going away */
 114 void
 115 sim_size (SIM_DESC sd, int i)
 116 {
 117   sim_io_error (sd, "unexpected call to sim_size()");
 118 }
 119
 120
 121 void
 122 sim_close (SIM_DESC sd, int quitting)
 123 {
 124   /* Uninstall the modules to avoid memory leaks,
 125      file descriptor leaks, etc.  */
 126   sim_module_uninstall (sd);
 127 }
 128
 129
 130 SIM_RC
 131 sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
 132 {
 133   bfd *prog_bfd;
 134
 135   prog_bfd = sim_load_file (sd, STATE_MY_NAME (sd),
 136                             STATE_CALLBACK (sd),
 137                             prog,
 138                             /* pass NULL for abfd, we always open our own */
 139                             NULL,
 140                             STATE_OPEN_KIND (sd) == SIM_OPEN_DEBUG);
 141   if (prog_bfd == NULL)
 142     return SIM_RC_FAIL;
 143   sim_analyze_program (sd, prog_bfd);
 144   return SIM_RC_OK;
 145 }
 146
 147
 148 void
 149 sim_kill (SIM_DESC sd)
 150 {
 151 }
 152
 153
 154 int
 155 sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 156 {
 157   return sim_core_read_buffer (sd, sim_core_write_map,
 158                                buf, mem, length);
 159 }
 160
 161
 162 int
 163 sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 164 {
 165   return sim_core_write_buffer (sd, sim_core_write_map,
 166                                 buf, mem, length);
 167 }
 168
 169
 170 /* FIXME - these magic numbers need to be moved elsewhere */
 171
 172 #define SP_REGNUM 1             /* Contains address of top of stack */
 173 #define FP_REGNUM 31            /* Contains address of executing stack frame */
 174 #define PC_REGNUM 32            /* Contains program counter (FIXME?) */
 175 #define NPC_REGNUM 33           /* Contains the next program counter (FIXME?) */
 176 #define A0_REGNUM 34            /* Accumulator register 0 */
 177 #define A3_REGNUM 37            /* Accumulator register 1 */
 178
 179 #define R0_REGNUM 0             /* General Purpose Register 0 - for sim */
 180 #define Rn_REGNUM 31            /* Last General Purpose Register - for sim */
 181 #define An_REGNUM A3_REGNUM     /* Last Accumulator register - for sim */
 182
 183 void
 184 sim_fetch_register (SIM_DESC sd, int regnr, unsigned char *buf)
 185 {
 186   if (regnr == R0_REGNUM)
 187     memset (buf, 0, sizeof (unsigned32));
 188   else if (regnr > R0_REGNUM && regnr <= Rn_REGNUM)
 189     *(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->reg[regnr - R0_REGNUM]);
 190   else if (regnr == PC_REGNUM)
 191     *(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->cia.ip);
 192   else if (regnr == NPC_REGNUM)
 193     *(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->cia.dp);
 194   else if (regnr >= A0_REGNUM && regnr <= An_REGNUM)
 195     *(unsigned64*)buf = H2T_8 (STATE_CPU (sd, 0)->acc[regnr - A0_REGNUM]);
 196   else
 197     sim_io_error (sd, "sim_fetch_register - unknown register nr %d", regnr);
 198   return;
 199 }
 200
 201
 202 void
 203 sim_store_register (SIM_DESC sd, int regnr, unsigned char *buf)
 204 {
 205   if (regnr >= R0_REGNUM && regnr <= Rn_REGNUM)
 206     STATE_CPU (sd, 0)->reg[regnr - R0_REGNUM] = T2H_4 (*(unsigned32*)buf);
 207   else if (regnr == PC_REGNUM)
 208     STATE_CPU (sd, 0)->cia.ip = T2H_4 (*(unsigned32*)buf);
 209   else if (regnr == NPC_REGNUM)
 210     STATE_CPU (sd, 0)->cia.dp = T2H_4 (*(unsigned32*)buf);
 211   else if (regnr == A0_REGNUM && regnr <= An_REGNUM)
 212     STATE_CPU (sd, 0)->acc[regnr - A0_REGNUM] = T2H_8 (*(unsigned64*)buf);
 213   else
 214     sim_io_error (sd, "sim_fetch_register - unknown register nr %d", regnr);
 215   return;
 216 }
 217
 218
 219 void
 220 sim_info (SIM_DESC sd, int verbose)
 221 {
 222 }
 223
 224
 225 SIM_RC
 226 sim_create_inferior (SIM_DESC sd,
 227                      char **argv,
 228                      char **envp)
 229 {
 230   STATE_CPU (sd, 0)->cia.ip = STATE_START_ADDR(sd);
 231   STATE_CPU (sd, 0)->cia.dp = (STATE_START_ADDR(sd)
 232                                + sizeof (instruction_word));
 233   STATE_CPU (sd, 0)->cr[IE_CR] |= IE_CR_IE;
 234   STATE_CPU (sd, 0)->reg[1] = TIC80_MEM_START + TIC80_MEM_SIZE - 16;
 235   return SIM_RC_OK;
 236 }
 237
 238
 239 void
 240 sim_do_command (SIM_DESC sd, char *cmd)
 241 {
 242   if (sim_args_command (sd, cmd) != SIM_RC_OK)
 243     sim_io_eprintf (sd, "Unknown command `%s'\n", cmd);
 244 }