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 #include "sim-main.h"
  21
  22 #include <stdlib.h>
  23
  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   }
  76 #endif
  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   /* Initialize various cgen things not done by common framework.
 134      Must be done after iq2000_cgen_cpu_open.  */
 135   cgen_init (sd);
 136
 137   return sd;
 138 }
 139 \f
 140 SIM_RC
 141 sim_create_inferior (sd, abfd, argv, envp)
 142      SIM_DESC sd;
 143      struct bfd *abfd;
 144      char * const *argv;
 145      char * const *envp;
 146 {
 147   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 148   SIM_ADDR addr;
 149
 150   if (abfd != NULL)
 151     addr = bfd_get_start_address (abfd);
 152   else
 153     addr = CPU2INSN(0);
 154   sim_pc_set (current_cpu, addr);
 155
 156   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 157      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 158      with `gdb`), we need to handle it because the user can change the
 159      argv on the fly via gdb's 'run'.  */
 160   if (STATE_PROG_ARGV (sd) != argv)
 161     {
 162       freeargv (STATE_PROG_ARGV (sd));
 163       STATE_PROG_ARGV (sd) = dupargv (argv);
 164     }
 165
 166   return SIM_RC_OK;
 167 }