sim/iq2000/sim-if.c

   1 /* Main simulator entry points specific to the IQ2000.
   2    Copyright (C) 2000-2020 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 \f
  30 /* Cover function for sim_cgen_disassemble_insn.  */
  31
  32 void
  33 iq2000bf_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn,
  34                           const ARGBUF *abuf, IADDR pc, char *buf)
  35 {
  36   sim_cgen_disassemble_insn(cpu, insn, abuf, pc, buf);
  37 }
  38
  39 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  40
  41 static void
  42 free_state (SIM_DESC sd)
  43 {
  44   if (STATE_MODULES (sd) != NULL)
  45     sim_module_uninstall (sd);
  46   sim_cpu_free_all (sd);
  47   sim_state_free (sd);
  48 }
  49
  50 /* Create an instance of the simulator.  */
  51
  52 SIM_DESC
  53 sim_open (kind, callback, abfd, argv)
  54      SIM_OPEN_KIND kind;
  55      host_callback *callback;
  56      struct bfd *abfd;
  57      char * const *argv;
  58 {
  59   char c;
  60   int i;
  61   SIM_DESC sd = sim_state_alloc (kind, callback);
  62
  63   /* The cpu data is kept in a separately allocated chunk of memory.  */
  64   if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)
  65     {
  66       free_state (sd);
  67       return 0;
  68     }
  69
  70 #if 0 /* FIXME: pc is in mach-specific struct */
  71   /* FIXME: watchpoints code shouldn't need this */
  72   {
  73     SIM_CPU *current_cpu = STATE_CPU (sd, 0);
  74     STATE_WATCHPOINTS (sd)->pc = &(PC);
  75     STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC);
  76   }
  77 #endif
  78
  79   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  80     {
  81       free_state (sd);
  82       return 0;
  83     }
  84
  85   /* The parser will print an error message for us, so we silently return.  */
  86   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  87     {
  88       free_state (sd);
  89       return 0;
  90     }
  91
  92   /* Allocate core managed memory.  */
  93   sim_do_commandf (sd, "memory region 0x%lx,0x%lx", IQ2000_INSN_VALUE, IQ2000_INSN_MEM_SIZE);
  94   sim_do_commandf (sd, "memory region 0x%lx,0x%lx", IQ2000_DATA_VALUE, IQ2000_DATA_MEM_SIZE);
  95
  96   /* check for/establish the reference program image */
  97   if (sim_analyze_program (sd,
  98                            (STATE_PROG_ARGV (sd) != NULL
  99                             ? *STATE_PROG_ARGV (sd)
 100                             : NULL),
 101                            abfd) != SIM_RC_OK)
 102     {
 103       free_state (sd);
 104       return 0;
 105     }
 106
 107   /* Establish any remaining configuration options.  */
 108   if (sim_config (sd) != SIM_RC_OK)
 109     {
 110       free_state (sd);
 111       return 0;
 112     }
 113
 114   if (sim_post_argv_init (sd) != SIM_RC_OK)
 115     {
 116       free_state (sd);
 117       return 0;
 118     }
 119
 120   /* Open a copy of the cpu descriptor table.  */
 121   {
 122     CGEN_CPU_DESC cd = iq2000_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 123                                               CGEN_ENDIAN_BIG);
 124
 125     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 126       {
 127         SIM_CPU *cpu = STATE_CPU (sd, i);
 128         CPU_CPU_DESC (cpu) = cd;
 129         CPU_DISASSEMBLER (cpu) = iq2000bf_disassemble_insn;
 130       }
 131     iq2000_cgen_init_dis (cd);
 132   }
 133
 134   /* Initialize various cgen things not done by common framework.
 135      Must be done after iq2000_cgen_cpu_open.  */
 136   cgen_init (sd);
 137
 138   return sd;
 139 }
 140 \f
 141 SIM_RC
 142 sim_create_inferior (sd, abfd, argv, envp)
 143      SIM_DESC sd;
 144      struct bfd *abfd;
 145      char * const *argv;
 146      char * const *envp;
 147 {
 148   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 149   SIM_ADDR addr;
 150
 151   if (abfd != NULL)
 152     addr = bfd_get_start_address (abfd);
 153   else
 154     addr = CPU2INSN(0);
 155   sim_pc_set (current_cpu, addr);
 156
 157   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 158      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 159      with `gdb`), we need to handle it because the user can change the
 160      argv on the fly via gdb's 'run'.  */
 161   if (STATE_PROG_ARGV (sd) != argv)
 162     {
 163       freeargv (STATE_PROG_ARGV (sd));
 164       STATE_PROG_ARGV (sd) = dupargv (argv);
 165     }
 166
 167   return SIM_RC_OK;
 168 }