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