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/* Main simulator entry points specific to the SH5.

   Copyright (C) 2000, 2008 Free Software Foundation, Inc.

   Contributed by Cygnus Solutions.

This file is part of the GNU simulators.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "libiberty.h"

#include "bfd.h"

#include "sim-main.h"

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

#include "sim-options.h"

#include "dis-asm.h"

static void free_state (SIM_DESC);

/* Since we don't build the cgen-opcode table, we use a wrapper around

   the existing disassembler from libopcodes. */

static CGEN_DISASSEMBLER sh64_disassemble_insn;

/* Records simulator descriptor so utilities like sh5_dump_regs can be

   called from gdb.  */

SIM_DESC current_state;

/* Cover function of sim_state_free to free the cpu buffers as well.  */

static void

free_state (SIM_DESC sd)

{

  if (STATE_MODULES (sd) != NULL)

    sim_module_uninstall (sd);

  sim_cpu_free_all (sd);

  sim_state_free (sd);

}

/* Create an instance of the simulator.  */

SIM_DESC

sim_open (kind, callback, abfd, argv)

     SIM_OPEN_KIND kind;

     host_callback *callback;

     struct bfd *abfd;

     char **argv;

{

  char c;

  int i;

  SIM_DESC sd = sim_state_alloc (kind, callback);

  /* The cpu data is kept in a separately allocated chunk of memory.  */

  if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)

    {

      free_state (sd);

      return 0;

    }

#if 0 /* FIXME: pc is in mach-specific struct */

  /* FIXME: watchpoints code shouldn't need this */

  {

    SIM_CPU *current_cpu = STATE_CPU (sd, 0);

    STATE_WATCHPOINTS (sd)->pc = &(PC);

    STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC);

  }

#endif

  if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)

    {

      free_state (sd);

      return 0;

    }

#if 0 /* FIXME: 'twould be nice if we could do this */

  /* These options override any module options.

     Obviously ambiguity should be avoided, however the caller may wish to

     augment the meaning of an option.  */

  if (extra_options != NULL)

    sim_add_option_table (sd, extra_options);

#endif

  /* getopt will print the error message so we just have to exit if this fails.

     FIXME: Hmmm...  in the case of gdb we need getopt to call

     print_filtered.  */

  if (sim_parse_args (sd, argv) != SIM_RC_OK)

    {

      free_state (sd);

      return 0;

    }

  /* Allocate core managed memory if none specified by user.

     Use address 4 here in case the user wanted address 0 unmapped.  */

  if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)

    sim_do_commandf (sd, "memory region 0,0x%x", SH64_DEFAULT_MEM_SIZE);

  /* Add a small memory region way up in the address space to handle

     writes to invalidate an instruction cache line.  This is used for

     trampolines.  Since we don't simulate the cache, this memory just

     avoids bus errors.  64K ought to do. */

  sim_do_command (sd," memory region 0xf0000000,0x10000");

  /* check for/establish the reference program image */

  if (sim_analyze_program (sd,

                           (STATE_PROG_ARGV (sd) != NULL

                            ? *STATE_PROG_ARGV (sd)

                            : NULL),

                           abfd) != SIM_RC_OK)

    {

      free_state (sd);

      return 0;

    }

  /* Establish any remaining configuration options.  */

  if (sim_config (sd) != SIM_RC_OK)

    {

      free_state (sd);

      return 0;

    }

  if (sim_post_argv_init (sd) != SIM_RC_OK)

    {

      free_state (sd);

      return 0;

    }

  /* Open a copy of the cpu descriptor table.  */

  {

    CGEN_CPU_DESC cd = sh_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,

                                              CGEN_ENDIAN_BIG);

    for (i = 0; i < MAX_NR_PROCESSORS; ++i)

      {

        SIM_CPU *cpu = STATE_CPU (sd, i);

        CPU_CPU_DESC (cpu) = cd;

        CPU_DISASSEMBLER (cpu) = sh64_disassemble_insn;

      }

  }

  /* Clear idesc table pointers for good measure. */

  sh64_idesc_media = sh64_idesc_compact = NULL;

  /* Initialize various cgen things not done by common framework.

     Must be done after sh_cgen_cpu_open.  */

  cgen_init (sd);

  /* Store in a global so things like sparc32_dump_regs can be invoked

     from the gdb command line.  */

  current_state = sd;

  return sd;

}

void

sim_close (sd, quitting)

     SIM_DESC sd;

     int quitting;

{

  sh_cgen_cpu_close (CPU_CPU_DESC (STATE_CPU (sd, 0)));

  sim_module_uninstall (sd);

}

SIM_RC

sim_create_inferior (sd, abfd, argv, envp)

     SIM_DESC sd;

     struct bfd *abfd;

     char **argv;

     char **envp;

{

  SIM_CPU *current_cpu = STATE_CPU (sd, 0);

  SIM_ADDR addr;

  if (abfd != NULL)

    addr = bfd_get_start_address (abfd);

  else

    addr = 0;

  sim_pc_set (current_cpu, addr);

#if 0

  STATE_ARGV (sd) = sim_copy_argv (argv);

  STATE_ENVP (sd) = sim_copy_argv (envp);

#endif

  return SIM_RC_OK;

}

void

sim_do_command (sd, cmd)

     SIM_DESC sd;

     char *cmd;

{

  if (sim_args_command (sd, cmd) != SIM_RC_OK)

    sim_io_eprintf (sd, "Unknown command `%s'\n", cmd);

}

/* Disassemble an instruction.  */

static void

sh64_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn,

                       const ARGBUF *abuf, IADDR pc, char *buf)

{

  struct disassemble_info disasm_info;

  SFILE sfile;

  SIM_DESC sd = CPU_STATE (cpu);

  sfile.buffer = sfile.current = buf;

  INIT_DISASSEMBLE_INFO (disasm_info, (FILE *) &sfile,

                         (fprintf_ftype) sim_disasm_sprintf);

  disasm_info.arch = bfd_get_arch (STATE_PROG_BFD (sd));

  disasm_info.mach = bfd_get_mach (STATE_PROG_BFD (sd));

  disasm_info.endian =

    (bfd_big_endian (STATE_PROG_BFD (sd)) ? BFD_ENDIAN_BIG

     : bfd_little_endian (STATE_PROG_BFD (sd)) ? BFD_ENDIAN_LITTLE

     : BFD_ENDIAN_UNKNOWN);

  disasm_info.read_memory_func = sim_disasm_read_memory;

  disasm_info.memory_error_func = sim_disasm_perror_memory;

  disasm_info.application_data = (PTR) cpu;

  if (sh64_h_ism_get (cpu) == ISM_MEDIA)

    print_insn_sh64x_media (pc, &disasm_info);

  else

    print_insn_sh (pc, &disasm_info);

}