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