sim/iq2000/sim-if.c

   1 /* Main simulator entry points specific to the IQ2000.
   2    Copyright (C) 2000-2021 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-options.h"
  28 #include "libiberty.h"
  29 #include "bfd.h"
  30
  31 static void free_state (SIM_DESC);
  32 \f
  33 /* Cover function for sim_cgen_disassemble_insn.  */
  34
  35 void
  36 iq2000bf_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn,
  37                           const ARGBUF *abuf, IADDR pc, char *buf)
  38 {
  39   sim_cgen_disassemble_insn(cpu, insn, abuf, pc, buf);
  40 }
  41
  42 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  43
  44 static void
  45 free_state (SIM_DESC sd)
  46 {
  47   if (STATE_MODULES (sd) != NULL)
  48     sim_module_uninstall (sd);
  49   sim_cpu_free_all (sd);
  50   sim_state_free (sd);
  51 }
  52
  53 extern const SIM_MACH * const iq2000_sim_machs[];
  54
  55 /* Create an instance of the simulator.  */
  56
  57 SIM_DESC
  58 sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
  59           char * const *argv)
  60 {
  61   char c;
  62   int i;
  63   SIM_DESC sd = sim_state_alloc (kind, callback);
  64
  65   /* Set default options before parsing user options.  */
  66   STATE_MACHS (sd) = iq2000_sim_machs;
  67   STATE_MODEL_NAME (sd) = "iq2000";
  68   current_alignment = STRICT_ALIGNMENT;
  69   current_target_byte_order = BFD_ENDIAN_BIG;
  70
  71   /* The cpu data is kept in a separately allocated chunk of memory.  */
  72   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
  73     {
  74       free_state (sd);
  75       return 0;
  76     }
  77
  78   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  79     {
  80       free_state (sd);
  81       return 0;
  82     }
  83
  84   /* The parser will print an error message for us, so we silently return.  */
  85   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  86     {
  87       free_state (sd);
  88       return 0;
  89     }
  90
  91   /* Allocate core managed memory.  */
  92   sim_do_commandf (sd, "memory region 0x%lx,0x%lx", IQ2000_INSN_VALUE, IQ2000_INSN_MEM_SIZE);
  93   sim_do_commandf (sd, "memory region 0x%lx,0x%lx", IQ2000_DATA_VALUE, IQ2000_DATA_MEM_SIZE);
  94
  95   /* check for/establish the reference program image */
  96   if (sim_analyze_program (sd,
  97                            (STATE_PROG_ARGV (sd) != NULL
  98                             ? *STATE_PROG_ARGV (sd)
  99                             : NULL),
 100                            abfd) != SIM_RC_OK)
 101     {
 102       free_state (sd);
 103       return 0;
 104     }
 105
 106   /* Establish any remaining configuration options.  */
 107   if (sim_config (sd) != SIM_RC_OK)
 108     {
 109       free_state (sd);
 110       return 0;
 111     }
 112
 113   if (sim_post_argv_init (sd) != SIM_RC_OK)
 114     {
 115       free_state (sd);
 116       return 0;
 117     }
 118
 119   /* Open a copy of the cpu descriptor table.  */
 120   {
 121     CGEN_CPU_DESC cd = iq2000_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 122                                               CGEN_ENDIAN_BIG);
 123
 124     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 125       {
 126         SIM_CPU *cpu = STATE_CPU (sd, i);
 127         CPU_CPU_DESC (cpu) = cd;
 128         CPU_DISASSEMBLER (cpu) = iq2000bf_disassemble_insn;
 129       }
 130     iq2000_cgen_init_dis (cd);
 131   }
 132
 133   return sd;
 134 }
 135 \f
 136 SIM_RC
 137 sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char * const *argv,
 138                      char * const *envp)
 139 {
 140   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 141   SIM_ADDR addr;
 142
 143   if (abfd != NULL)
 144     addr = bfd_get_start_address (abfd);
 145   else
 146     addr = CPU2INSN(0);
 147   sim_pc_set (current_cpu, addr);
 148
 149   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 150      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 151      with `gdb`), we need to handle it because the user can change the
 152      argv on the fly via gdb's 'run'.  */
 153   if (STATE_PROG_ARGV (sd) != argv)
 154     {
 155       freeargv (STATE_PROG_ARGV (sd));
 156       STATE_PROG_ARGV (sd) = dupargv (argv);
 157     }
 158
 159   return SIM_RC_OK;
 160 }