227 lines
6.2 KiB
C
227 lines
6.2 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
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Copyright (C) 1997, Free Software Foundation
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <signal.h> /* FIXME - should be machine dependant version */
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#include <stdarg.h>
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#include <ctype.h>
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#include "bfd.h"
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#include "sim-main.h"
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#include "sim-utils.h"
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#include "sim-options.h"
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#endif
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#define SIM_ADDR unsigned
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SIM_DESC
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sim_open (SIM_OPEN_KIND kind,
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host_callback *callback,
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struct _bfd *abfd,
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char **argv)
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{
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SIM_DESC sd = sim_state_alloc (kind, callback);
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if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
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return 0;
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/* getopt will print the error message so we just have to exit if this fails.
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FIXME: Hmmm... in the case of gdb we need getopt to call
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print_filtered. */
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if (sim_parse_args (sd, argv) != SIM_RC_OK)
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{
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/* Uninstall the modules to avoid memory leaks,
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file descriptor leaks, etc. */
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sim_module_uninstall (sd);
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return 0;
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}
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/* check for/establish the a reference program image */
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if (sim_analyze_program (sd,
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(STATE_PROG_ARGV (sd) != NULL
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? *STATE_PROG_ARGV (sd)
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: NULL),
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abfd) != SIM_RC_OK)
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{
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sim_module_uninstall (sd);
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return 0;
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}
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/* establish any remaining configuration options */
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if (sim_config (sd) != SIM_RC_OK)
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{
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sim_module_uninstall (sd);
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return 0;
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}
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if (sim_post_argv_init (sd) != SIM_RC_OK)
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{
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/* Uninstall the modules to avoid memory leaks,
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file descriptor leaks, etc. */
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sim_module_uninstall (sd);
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return 0;
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}
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/* Initialize the main processor */
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memset (&STATE_CPU (sd, 0)->reg, 0, sizeof STATE_CPU (sd, 0)->reg);
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memset (&STATE_CPU (sd, 0)->acc, 0, sizeof STATE_CPU (sd, 0)->acc);
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memset (&STATE_CPU (sd, 0)->cr, 0, sizeof STATE_CPU (sd, 0)->cr);
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STATE_CPU (sd, 0)->is_user_mode = 0;
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memset (&STATE_CPU (sd, 0)->cia, 0, sizeof STATE_CPU (sd, 0)->cia);
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CPU_STATE (STATE_CPU (sd, 0)) = sd;
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#define TIC80_MEM_START 0x2000000
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#define TIC80_MEM_SIZE 0x100000
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/* external memory */
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sim_core_attach(sd,
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NULL,
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attach_raw_memory,
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access_read_write_exec,
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0, TIC80_MEM_START, TIC80_MEM_SIZE, NULL, NULL);
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sim_core_attach(sd,
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NULL,
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attach_raw_memory,
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access_read_write_exec,
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0, 0, TIC80_MEM_SIZE, NULL, NULL);
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/* FIXME: for now */
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return sd;
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}
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void
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sim_close (SIM_DESC sd, int quitting)
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{
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/* Uninstall the modules to avoid memory leaks,
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file descriptor leaks, etc. */
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sim_module_uninstall (sd);
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}
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int
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sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
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{
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return sim_core_read_buffer (sd, NULL, sim_core_write_map,
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buf, mem, length);
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}
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int
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sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
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{
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return sim_core_write_buffer (sd, NULL, sim_core_write_map,
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buf, mem, length);
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}
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/* FIXME - these magic numbers need to be moved elsewhere */
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#define SP_REGNUM 1 /* Contains address of top of stack */
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#define FP_REGNUM 31 /* Contains address of executing stack frame */
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#define PC_REGNUM 32 /* Contains program counter (FIXME?) */
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#define NPC_REGNUM 33 /* Contains the next program counter (FIXME?) */
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#define A0_REGNUM 34 /* Accumulator register 0 */
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#define A3_REGNUM 37 /* Accumulator register 1 */
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#define R0_REGNUM 0 /* General Purpose Register 0 - for sim */
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#define Rn_REGNUM 31 /* Last General Purpose Register - for sim */
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#define An_REGNUM A3_REGNUM /* Last Accumulator register - for sim */
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void
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sim_fetch_register (SIM_DESC sd, int regnr, unsigned char *buf)
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{
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if (regnr == R0_REGNUM)
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memset (buf, 0, sizeof (unsigned32));
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else if (regnr > R0_REGNUM && regnr <= Rn_REGNUM)
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*(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->reg[regnr - R0_REGNUM]);
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else if (regnr == PC_REGNUM)
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*(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->cia.ip);
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else if (regnr == NPC_REGNUM)
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*(unsigned32*)buf = H2T_4 (STATE_CPU (sd, 0)->cia.dp);
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else if (regnr >= A0_REGNUM && regnr <= An_REGNUM)
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*(unsigned64*)buf = H2T_8 (STATE_CPU (sd, 0)->acc[regnr - A0_REGNUM]);
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else
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sim_io_error (sd, "sim_fetch_register - unknown register nr %d", regnr);
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return;
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}
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void
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sim_store_register (SIM_DESC sd, int regnr, unsigned char *buf)
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{
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if (regnr >= R0_REGNUM && regnr <= Rn_REGNUM)
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STATE_CPU (sd, 0)->reg[regnr - R0_REGNUM] = T2H_4 (*(unsigned32*)buf);
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else if (regnr == PC_REGNUM)
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STATE_CPU (sd, 0)->cia.ip = T2H_4 (*(unsigned32*)buf);
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else if (regnr == NPC_REGNUM)
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STATE_CPU (sd, 0)->cia.dp = T2H_4 (*(unsigned32*)buf);
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else if (regnr >= A0_REGNUM && regnr <= An_REGNUM)
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STATE_CPU (sd, 0)->acc[regnr - A0_REGNUM] = T2H_8 (*(unsigned64*)buf);
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else
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sim_io_error (sd, "sim_store_register - unknown register nr %d", regnr);
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return;
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}
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void
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sim_info (SIM_DESC sd, int verbose)
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{
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}
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SIM_RC
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sim_create_inferior (SIM_DESC sd,
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struct _bfd *abfd,
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char **argv,
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char **envp)
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{
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if (abfd != NULL)
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STATE_CPU (sd, 0)->cia.ip = bfd_get_start_address (abfd);
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else
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STATE_CPU (sd, 0)->cia.ip = 0;
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STATE_CPU (sd, 0)->cia.dp = (STATE_CPU (sd, 0)->cia.ip
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+ sizeof (instruction_word));
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STATE_CPU (sd, 0)->cr[IE_CR] |= IE_CR_IE;
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STATE_CPU (sd, 0)->reg[1] = TIC80_MEM_START + TIC80_MEM_SIZE - 16;
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return SIM_RC_OK;
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}
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void
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sim_do_command (SIM_DESC sd, char *cmd)
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{
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if (sim_args_command (sd, cmd) != SIM_RC_OK)
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sim_io_eprintf (sd, "Unknown command `%s'\n", cmd);
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}
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