sim/iq2000/sim-if.c

   1 /* Main simulator entry points specific to the IQ2000.
   2    Copyright (C) 2000-2022 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 /* This must come before any other includes.  */
  21 #include "defs.h"
  22
  23 #include "sim-main.h"
  24
  25 #include <stdlib.h>
  26
  27 #include "sim/callback.h"
  28 #include "sim-options.h"
  29 #include "libiberty.h"
  30 #include "bfd.h"
  31
  32 static void free_state (SIM_DESC);
  33 \f
  34 /* Cover function for sim_cgen_disassemble_insn.  */
  35
  36 static 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 extern const SIM_MACH * const iq2000_sim_machs[];
  55
  56 /* Create an instance of the simulator.  */
  57
  58 SIM_DESC
  59 sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
  60           char * const *argv)
  61 {
  62   char c;
  63   int i;
  64   SIM_DESC sd = sim_state_alloc (kind, callback);
  65
  66   /* Set default options before parsing user options.  */
  67   STATE_MACHS (sd) = iq2000_sim_machs;
  68   STATE_MODEL_NAME (sd) = "iq2000";
  69   current_alignment = STRICT_ALIGNMENT;
  70   current_target_byte_order = BFD_ENDIAN_BIG;
  71
  72   /* The cpu data is kept in a separately allocated chunk of memory.  */
  73   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
  74     {
  75       free_state (sd);
  76       return 0;
  77     }
  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%x,0x%x", IQ2000_INSN_VALUE, IQ2000_INSN_MEM_SIZE);
  94   sim_do_commandf (sd, "memory region 0x%x,0x%x", IQ2000_DATA_VALUE, IQ2000_DATA_MEM_SIZE);
  95
  96   /* check for/establish the reference program image */
  97   if (sim_analyze_program (sd, STATE_PROG_FILE (sd), abfd) != SIM_RC_OK)
  98     {
  99       free_state (sd);
 100       return 0;
 101     }
 102
 103   /* Establish any remaining configuration options.  */
 104   if (sim_config (sd) != SIM_RC_OK)
 105     {
 106       free_state (sd);
 107       return 0;
 108     }
 109
 110   if (sim_post_argv_init (sd) != SIM_RC_OK)
 111     {
 112       free_state (sd);
 113       return 0;
 114     }
 115
 116   /* Open a copy of the cpu descriptor table.  */
 117   {
 118     CGEN_CPU_DESC cd = iq2000_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 119                                               CGEN_ENDIAN_BIG);
 120
 121     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 122       {
 123         SIM_CPU *cpu = STATE_CPU (sd, i);
 124         CPU_CPU_DESC (cpu) = cd;
 125         CPU_DISASSEMBLER (cpu) = iq2000bf_disassemble_insn;
 126       }
 127     iq2000_cgen_init_dis (cd);
 128   }
 129
 130   return sd;
 131 }
 132 \f
 133 SIM_RC
 134 sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char * const *argv,
 135                      char * const *env)
 136 {
 137   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 138   host_callback *cb = STATE_CALLBACK (sd);
 139   SIM_ADDR addr;
 140
 141   if (abfd != NULL)
 142     addr = bfd_get_start_address (abfd);
 143   else
 144     addr = CPU2INSN(0);
 145   sim_pc_set (current_cpu, addr);
 146
 147   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 148      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 149      with `gdb`), we need to handle it because the user can change the
 150      argv on the fly via gdb's 'run'.  */
 151   if (STATE_PROG_ARGV (sd) != argv)
 152     {
 153       freeargv (STATE_PROG_ARGV (sd));
 154       STATE_PROG_ARGV (sd) = dupargv (argv);
 155     }
 156
 157   if (STATE_PROG_ENVP (sd) != env)
 158     {
 159       freeargv (STATE_PROG_ENVP (sd));
 160       STATE_PROG_ENVP (sd) = dupargv (env);
 161     }
 162
 163   cb->argv = STATE_PROG_ARGV (sd);
 164   cb->envp = STATE_PROG_ENVP (sd);
 165
 166   return SIM_RC_OK;
 167 }