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_extra (sd, 1, sizeof (struct iq2000_sim_cpu))
  74       != SIM_RC_OK)
  75     {
  76       free_state (sd);
  77       return 0;
  78     }
  79
  80   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  81     {
  82       free_state (sd);
  83       return 0;
  84     }
  85
  86   /* The parser will print an error message for us, so we silently return.  */
  87   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  88     {
  89       free_state (sd);
  90       return 0;
  91     }
  92
  93   /* Allocate core managed memory.  */
  94   sim_do_commandf (sd, "memory region 0x%x,0x%x", IQ2000_INSN_VALUE, IQ2000_INSN_MEM_SIZE);
  95   sim_do_commandf (sd, "memory region 0x%x,0x%x", IQ2000_DATA_VALUE, IQ2000_DATA_MEM_SIZE);
  96
  97   /* check for/establish the reference program image */
  98   if (sim_analyze_program (sd, STATE_PROG_FILE (sd), abfd) != SIM_RC_OK)
  99     {
 100       free_state (sd);
 101       return 0;
 102     }
 103
 104   /* Establish any remaining configuration options.  */
 105   if (sim_config (sd) != SIM_RC_OK)
 106     {
 107       free_state (sd);
 108       return 0;
 109     }
 110
 111   if (sim_post_argv_init (sd) != SIM_RC_OK)
 112     {
 113       free_state (sd);
 114       return 0;
 115     }
 116
 117   /* Open a copy of the cpu descriptor table.  */
 118   {
 119     CGEN_CPU_DESC cd = iq2000_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 120                                               CGEN_ENDIAN_BIG);
 121
 122     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 123       {
 124         SIM_CPU *cpu = STATE_CPU (sd, i);
 125         CPU_CPU_DESC (cpu) = cd;
 126         CPU_DISASSEMBLER (cpu) = iq2000bf_disassemble_insn;
 127       }
 128     iq2000_cgen_init_dis (cd);
 129   }
 130
 131   return sd;
 132 }
 133 \f
 134 SIM_RC
 135 sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char * const *argv,
 136                      char * const *env)
 137 {
 138   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 139   host_callback *cb = STATE_CALLBACK (sd);
 140   SIM_ADDR addr;
 141
 142   if (abfd != NULL)
 143     addr = bfd_get_start_address (abfd);
 144   else
 145     addr = CPU2INSN(0);
 146   sim_pc_set (current_cpu, addr);
 147
 148   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 149      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 150      with `gdb`), we need to handle it because the user can change the
 151      argv on the fly via gdb's 'run'.  */
 152   if (STATE_PROG_ARGV (sd) != argv)
 153     {
 154       freeargv (STATE_PROG_ARGV (sd));
 155       STATE_PROG_ARGV (sd) = dupargv (argv);
 156     }
 157
 158   if (STATE_PROG_ENVP (sd) != env)
 159     {
 160       freeargv (STATE_PROG_ENVP (sd));
 161       STATE_PROG_ENVP (sd) = dupargv (env);
 162     }
 163
 164   cb->argv = STATE_PROG_ARGV (sd);
 165   cb->envp = STATE_PROG_ENVP (sd);
 166
 167   return SIM_RC_OK;
 168 }