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      1 /* Main simulator entry points specific to the IQ2000.
      2    Copyright (C) 2000-2024 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 
     34 /* Cover function for sim_cgen_disassemble_insn.  */
     36 
     37 static void
     38 iq2000bf_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn,
     39 			  const ARGBUF *abuf, IADDR pc, char *buf)
     40 {
     41   sim_cgen_disassemble_insn(cpu, insn, abuf, pc, buf);
     42 }
     43 
     44 /* Cover function of sim_state_free to free the cpu buffers as well.  */
     45 
     46 static void
     47 free_state (SIM_DESC sd)
     48 {
     49   if (STATE_MODULES (sd) != NULL)
     50     sim_module_uninstall (sd);
     51   sim_cpu_free_all (sd);
     52   sim_state_free (sd);
     53 }
     54 
     55 extern const SIM_MACH * const iq2000_sim_machs[];
     56 
     57 /* Create an instance of the simulator.  */
     58 
     59 SIM_DESC
     60 sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
     61 	  char * const *argv)
     62 {
     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, 0, 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 
    134 SIM_RC
    136 sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char * const *argv,
    137 		     char * const *env)
    138 {
    139   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
    140   host_callback *cb = STATE_CALLBACK (sd);
    141   bfd_vma 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   if (STATE_PROG_ENVP (sd) != env)
    160     {
    161       freeargv (STATE_PROG_ENVP (sd));
    162       STATE_PROG_ENVP (sd) = dupargv (env);
    163     }
    164 
    165   cb->argv = STATE_PROG_ARGV (sd);
    166   cb->envp = STATE_PROG_ENVP (sd);
    167 
    168   return SIM_RC_OK;
    169 }
    170