sim/iq2000/sim-if.c

   1 /* Main simulator entry points specific to the IQ2000.
   2    Copyright (C) 2000, 2007, 2008, 2009 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions.
   4
   5 This file is part of the GNU simulators.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "sim-main.h"
  21 #ifdef HAVE_STDLIB_H
  22 #include <stdlib.h>
  23 #endif
  24 #include "sim-options.h"
  25 #include "libiberty.h"
  26 #include "bfd.h"
  27
  28 static void free_state (SIM_DESC);
  29
  30 /* Records simulator descriptor so utilities like iq2000_dump_regs can be
  31    called from gdb.  */
  32 SIM_DESC current_state;
  33 \f
  34 /* Cover function for sim_cgen_disassemble_insn.  */
  35
  36 void
  37 iq2000bf_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn,
  38                           const ARGBUF *abuf, IADDR pc, char *buf)
  39 {
  40   sim_cgen_disassemble_insn(cpu, insn, abuf, pc, buf);
  41 }
  42
  43 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  44
  45 static void
  46 free_state (SIM_DESC sd)
  47 {
  48   if (STATE_MODULES (sd) != NULL)
  49     sim_module_uninstall (sd);
  50   sim_cpu_free_all (sd);
  51   sim_state_free (sd);
  52 }
  53
  54 /* Create an instance of the simulator.  */
  55
  56 SIM_DESC
  57 sim_open (kind, callback, abfd, argv)
  58      SIM_OPEN_KIND kind;
  59      host_callback *callback;
  60      struct bfd *abfd;
  61      char **argv;
  62 {
  63   char c;
  64   int i;
  65   SIM_DESC sd = sim_state_alloc (kind, callback);
  66
  67   /* The cpu data is kept in a separately allocated chunk of memory.  */
  68   if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)
  69     {
  70       free_state (sd);
  71       return 0;
  72     }
  73
  74 #if 0 /* FIXME: pc is in mach-specific struct */
  75   /* FIXME: watchpoints code shouldn't need this */
  76   {
  77     SIM_CPU *current_cpu = STATE_CPU (sd, 0);
  78     STATE_WATCHPOINTS (sd)->pc = &(PC);
  79     STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC);
  80   }
  81 #endif
  82
  83   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  84     {
  85       free_state (sd);
  86       return 0;
  87     }
  88
  89 #if 0 /* FIXME: 'twould be nice if we could do this */
  90   /* These options override any module options.
  91      Obviously ambiguity should be avoided, however the caller may wish to
  92      augment the meaning of an option.  */
  93   if (extra_options != NULL)
  94     sim_add_option_table (sd, extra_options);
  95 #endif
  96
  97   /* getopt will print the error message so we just have to exit if this fails.
  98      FIXME: Hmmm...  in the case of gdb we need getopt to call
  99      print_filtered.  */
 100   if (sim_parse_args (sd, argv) != SIM_RC_OK)
 101     {
 102       free_state (sd);
 103       return 0;
 104     }
 105
 106   /* Allocate core managed memory.  */
 107   sim_do_commandf (sd, "memory region 0x%lx,0x%lx", IQ2000_INSN_VALUE, IQ2000_INSN_MEM_SIZE);
 108   sim_do_commandf (sd, "memory region 0x%lx,0x%lx", IQ2000_DATA_VALUE, IQ2000_DATA_MEM_SIZE);
 109
 110   /* check for/establish the reference program image */
 111   if (sim_analyze_program (sd,
 112                            (STATE_PROG_ARGV (sd) != NULL
 113                             ? *STATE_PROG_ARGV (sd)
 114                             : NULL),
 115                            abfd) != SIM_RC_OK)
 116     {
 117       free_state (sd);
 118       return 0;
 119     }
 120
 121   /* Establish any remaining configuration options.  */
 122   if (sim_config (sd) != SIM_RC_OK)
 123     {
 124       free_state (sd);
 125       return 0;
 126     }
 127
 128   if (sim_post_argv_init (sd) != SIM_RC_OK)
 129     {
 130       free_state (sd);
 131       return 0;
 132     }
 133
 134   /* Open a copy of the cpu descriptor table.  */
 135   {
 136     CGEN_CPU_DESC cd = iq2000_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 137                                               CGEN_ENDIAN_BIG);
 138
 139     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 140       {
 141         SIM_CPU *cpu = STATE_CPU (sd, i);
 142         CPU_CPU_DESC (cpu) = cd;
 143         CPU_DISASSEMBLER (cpu) = iq2000bf_disassemble_insn;
 144       }
 145     iq2000_cgen_init_dis (cd);
 146   }
 147
 148   /* Initialize various cgen things not done by common framework.
 149      Must be done after iq2000_cgen_cpu_open.  */
 150   cgen_init (sd);
 151
 152   /* Store in a global so things like sparc32_dump_regs can be invoked
 153      from the gdb command line.  */
 154   current_state = sd;
 155
 156   return sd;
 157 }
 158
 159 void
 160 sim_close (sd, quitting)
 161      SIM_DESC sd;
 162      int quitting;
 163 {
 164   iq2000_cgen_cpu_close (CPU_CPU_DESC (STATE_CPU (sd, 0)));
 165   sim_module_uninstall (sd);
 166 }
 167 \f
 168 SIM_RC
 169 sim_create_inferior (sd, abfd, argv, envp)
 170      SIM_DESC sd;
 171      struct bfd *abfd;
 172      char **argv;
 173      char **envp;
 174 {
 175   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 176   SIM_ADDR addr;
 177
 178   if (abfd != NULL)
 179     addr = bfd_get_start_address (abfd);
 180   else
 181     addr = CPU2INSN(0);
 182   sim_pc_set (current_cpu, addr);
 183
 184 #if 0
 185   STATE_ARGV (sd) = sim_copy_argv (argv);
 186   STATE_ENVP (sd) = sim_copy_argv (envp);
 187 #endif
 188
 189   return SIM_RC_OK;
 190 }
 191
 192 void
 193 sim_do_command (sd, cmd)
 194      SIM_DESC sd;
 195      char *cmd;
 196 {
 197   if (sim_args_command (sd, cmd) != SIM_RC_OK)
 198     sim_io_eprintf (sd, "Unknown command `%s'\n", cmd);
 199 }
 200
 201
 202