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binutils-gdb/sim/erc32/sis.c
Stan Shebs c906108c21 Initial creation of sourceware repository
1999-04-16 01:35:26 +00:00

311 lines
7.2 KiB
C
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/*
* This file is part of SIS.
*
* SIS, SPARC instruction simulator. Copyright (C) 1995 Jiri Gaisler, European
* Space Agency
*
* 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 2 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, write to the Free Software Foundation, Inc., 675
* Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "config.h"
#include <signal.h>
#include <string.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <stdio.h>
#include <time.h>
#include <sys/fcntl.h>
#include "sis.h"
#include <dis-asm.h>
#include "sim-config.h"
#ifndef fprintf
extern fprintf();
#endif
#define VAL(x) strtol(x,(char **)NULL,0)
/* Structures and functions from readline library */
typedef struct {
char *line;
char *data;
} HIST_ENTRY;
extern char * readline PARAMS ((char *prompt));
extern void using_history PARAMS ((void));
extern void add_history PARAMS ((char *string));
extern HIST_ENTRY *remove_history PARAMS ((int which));
/* Command history buffer length - MUST be binary */
#define HIST_LEN 64
extern struct disassemble_info dinfo;
extern struct pstate sregs;
extern struct estate ebase;
extern int ctrl_c;
extern int nfp;
extern int ift;
extern int wrp;
extern int rom8;
extern int uben;
extern int sis_verbose;
extern char *sis_version;
extern struct estate ebase;
extern struct evcell evbuf[];
extern struct irqcell irqarr[];
extern int irqpend, ext_irl;
extern int termsave;
extern int sparclite;
extern int dumbio;
extern char uart_dev1[];
extern char uart_dev2[];
extern uint32 last_load_addr;
#ifdef ERA
extern int era;
#endif
int
run_sim(sregs, icount, dis)
struct pstate *sregs;
unsigned int icount;
int dis;
{
int irq, mexc, deb, asi;
sregs->starttime = time(NULL);
init_stdio();
if (sregs->err_mode) icount = 0;
deb = dis || sregs->histlen || sregs->bptnum;
irq = 0;
while (icount > 0) {
if (sregs->psr & 0x080)
asi = 9;
else
asi = 8;
mexc = memory_read(asi, sregs->pc, &sregs->inst, 2, &sregs->hold);
sregs->icnt = 1;
if (sregs->annul) {
sregs->annul = 0;
sregs->pc = sregs->npc;
sregs->npc = sregs->npc + 4;
} else {
sregs->fhold = 0;
if (ext_irl) irq = check_interrupts(sregs);
if (!irq) {
if (mexc) {
sregs->trap = I_ACC_EXC;
} else {
if (deb) {
if ((sregs->bphit = check_bpt(sregs)) != 0) {
restore_stdio();
return (BPT_HIT);
}
if (sregs->histlen) {
sregs->histbuf[sregs->histind].addr = sregs->pc;
sregs->histbuf[sregs->histind].time = ebase.simtime;
sregs->histind++;
if (sregs->histind >= sregs->histlen)
sregs->histind = 0;
}
if (dis) {
printf(" %8u ", ebase.simtime);
dis_mem(sregs->pc, 1, &dinfo);
}
}
dispatch_instruction(sregs);
icount--;
}
}
if (sregs->trap) {
irq = 0;
sregs->err_mode = execute_trap(sregs);
if (sregs->err_mode) {
error_mode(sregs->pc);
icount = 0;
}
}
}
advance_time(sregs);
if (ctrl_c || (sregs->tlimit <= ebase.simtime)) {
icount = 0;
if (sregs->tlimit <= ebase.simtime) sregs->tlimit = -1;
}
}
sregs->tottime += time(NULL) - sregs->starttime;
restore_stdio();
if (sregs->err_mode)
return (ERROR);
if (ctrl_c) {
ctrl_c = 0;
return (CTRL_C);
}
return (TIME_OUT);
}
int
main(argc, argv)
int argc;
char **argv;
{
int cont = 1;
int stat = 1;
int freq = 14;
int copt = 0;
char *cfile, *bacmd;
char *cmdq[HIST_LEN];
int cmdi = 0;
int i;
cfile = 0;
for (i = 0; i < 64; i++)
cmdq[i] = 0;
printf("\n SIS - SPARC intruction simulator %s, copyright Jiri Gaisler 1995\n", sis_version);
printf(" Bug-reports to jgais@wd.estec.esa.nl\n\n");
while (stat < argc) {
if (argv[stat][0] == '-') {
if (strcmp(argv[stat], "-v") == 0) {
sis_verbose = 1;
} else if (strcmp(argv[stat], "-c") == 0) {
if ((stat + 1) < argc) {
copt = 1;
cfile = argv[++stat];
}
} else if (strcmp(argv[stat], "-nfp") == 0)
nfp = 1;
else if (strcmp(argv[stat], "-ift") == 0)
ift = 1;
else if (strcmp(argv[stat], "-wrp") == 0)
wrp = 1;
else if (strcmp(argv[stat], "-rom8") == 0)
rom8 = 1;
else if (strcmp(argv[stat], "-uben") == 0)
uben = 1;
else if (strcmp(argv[stat], "-uart1") == 0) {
if ((stat + 1) < argc)
strcpy(uart_dev1, argv[++stat]);
} else if (strcmp(argv[stat], "-uart2") == 0) {
if ((stat + 1) < argc)
strcpy(uart_dev2, argv[++stat]);
} else if (strcmp(argv[stat], "-freq") == 0) {
if ((stat + 1) < argc)
freq = VAL(argv[++stat]);
} else if (strcmp(argv[stat], "-sparclite") == 0) {
sparclite = 1;
#ifdef ERA
} else if (strcmp(argv[stat], "-era") == 0) {
era = 1;
#endif
} else if (strcmp(argv[stat], "-dumbio") == 0) {
dumbio = 1;
} else {
printf("unknown option %s\n", argv[stat]);
usage();
exit(1);
}
} else {
last_load_addr = bfd_load(argv[stat]);
}
stat++;
}
if (nfp)
printf("FPU disabled\n");
#ifdef ERA
if (era)
printf("ERA ECC emulation enabled\n");
#endif
sregs.freq = freq;
INIT_DISASSEMBLE_INFO(dinfo, stdout, (fprintf_ftype) fprintf);
dinfo.endian = BFD_ENDIAN_BIG;
termsave = fcntl(0, F_GETFL, 0);
using_history();
init_signals();
ebase.simtime = 0;
reset_all();
init_bpt(&sregs);
init_sim();
#ifdef STAT
reset_stat(&sregs);
#endif
if (copt) {
bacmd = (char *) malloc(256);
strcpy(bacmd, "batch ");
strcat(bacmd, cfile);
exec_cmd(&sregs, bacmd);
}
while (cont) {
if (cmdq[cmdi] != 0) {
#if 0
remove_history(cmdq[cmdi]);
#else
remove_history(cmdi);
#endif
free(cmdq[cmdi]);
cmdq[cmdi] = 0;
}
cmdq[cmdi] = readline("sis> ");
if (cmdq[cmdi] && *cmdq[cmdi])
add_history(cmdq[cmdi]);
if (cmdq[cmdi])
stat = exec_cmd(&sregs, cmdq[cmdi]);
else {
puts("\n");
exit(0);
}
switch (stat) {
case OK:
break;
case CTRL_C:
printf("\b\bInterrupt!\n");
case TIME_OUT:
printf(" Stopped at time %d (%.3f ms)\n", ebase.simtime,
((double) ebase.simtime / (double) sregs.freq) / 1000.0);
break;
case BPT_HIT:
printf("breakpoint at 0x%08x reached\n", sregs.pc);
sregs.bphit = 1;
break;
case ERROR:
printf("IU in error mode (%d)\n", sregs.trap);
stat = 0;
printf(" %8d ", ebase.simtime);
dis_mem(sregs.pc, 1, &dinfo);
break;
default:
break;
}
ctrl_c = 0;
stat = OK;
cmdi = (cmdi + 1) & (HIST_LEN - 1);
}
return 0;
}
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