sim/erc32/sis.c

   1 /*
   2  * This file is part of SIS.
   3  *
   4  * SIS, SPARC instruction simulator. Copyright (C) 1995 Jiri Gaisler, European
   5  * Space Agency
   6  *
   7  * This program is free software; you can redistribute it and/or modify it under
   8  * the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 3 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, see <http://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 #include "config.h"
  23 #include <signal.h>
  24 #include <string.h>
  25 #ifdef HAVE_STDLIB_H
  26 #include <stdlib.h>
  27 #endif
  28 #include <stdio.h>
  29 #include <time.h>
  30 #include <sys/fcntl.h>
  31 #include "sis.h"
  32 #include <dis-asm.h>
  33 #include "sim-config.h"
  34
  35 #define VAL(x)  strtol(x,(char **)NULL,0)
  36
  37 /* Structures and functions from readline library */
  38
  39 typedef struct {
  40   char *line;
  41   char *data;
  42 } HIST_ENTRY;
  43
  44 extern char *   readline PARAMS ((char *prompt));
  45 extern void     using_history PARAMS ((void));
  46 extern void     add_history PARAMS ((char *string));
  47 extern HIST_ENTRY *remove_history PARAMS ((int which));
  48
  49
  50
  51 /* Command history buffer length - MUST be binary */
  52 #define HIST_LEN        64
  53
  54 extern struct disassemble_info dinfo;
  55 extern struct pstate sregs;
  56 extern struct estate ebase;
  57
  58 extern int      ctrl_c;
  59 extern int      nfp;
  60 extern int      ift;
  61 extern int      wrp;
  62 extern int      rom8;
  63 extern int      uben;
  64 extern int      sis_verbose;
  65 extern char    *sis_version;
  66 extern struct estate ebase;
  67 extern struct evcell evbuf[];
  68 extern struct irqcell irqarr[];
  69 extern int      irqpend, ext_irl;
  70 extern int      termsave;
  71 extern int      sparclite;
  72 extern int      dumbio;
  73 extern char     uart_dev1[];
  74 extern char     uart_dev2[];
  75 extern uint32   last_load_addr;
  76
  77 #ifdef ERA
  78 extern int era;
  79 #endif
  80
  81 int
  82 run_sim(sregs, icount, dis)
  83     struct pstate  *sregs;
  84     uint64          icount;
  85     int             dis;
  86 {
  87     int             irq, mexc, deb, asi;
  88
  89     sregs->starttime = time(NULL);
  90     init_stdio();
  91     if (sregs->err_mode) icount = 0;
  92     deb = dis || sregs->histlen || sregs->bptnum;
  93     irq = 0;
  94     while (icount > 0) {
  95
  96         if (sregs->psr & 0x080)
  97             asi = 9;
  98         else
  99             asi = 8;
 100         mexc = memory_read(asi, sregs->pc, &sregs->inst, 2, &sregs->hold);
 101         sregs->icnt = 1;
 102         if (sregs->annul) {
 103             sregs->annul = 0;
 104             sregs->pc = sregs->npc;
 105             sregs->npc = sregs->npc + 4;
 106         } else {
 107             sregs->fhold = 0;
 108             if (ext_irl) irq = check_interrupts(sregs);
 109             if (!irq) {
 110                 if (mexc) {
 111                     sregs->trap = I_ACC_EXC;
 112                 } else {
 113                     if (deb) {
 114                         if ((sregs->bphit = check_bpt(sregs)) != 0) {
 115                             restore_stdio();
 116                             return (BPT_HIT);
 117                         }
 118                         if (sregs->histlen) {
 119                             sregs->histbuf[sregs->histind].addr = sregs->pc;
 120                             sregs->histbuf[sregs->histind].time = ebase.simtime;
 121                             sregs->histind++;
 122                             if (sregs->histind >= sregs->histlen)
 123                                 sregs->histind = 0;
 124                         }
 125                         if (dis) {
 126                             printf(" %8u ", ebase.simtime);
 127                             dis_mem(sregs->pc, 1, &dinfo);
 128                         }
 129                     }
 130                     dispatch_instruction(sregs);
 131                     icount--;
 132                 }
 133             }
 134             if (sregs->trap) {
 135                 irq = 0;
 136                 sregs->err_mode = execute_trap(sregs);
 137                 if (sregs->err_mode) {
 138                     error_mode(sregs->pc);
 139                     icount = 0;
 140                 }
 141             }
 142         }
 143         advance_time(sregs);
 144         if (ctrl_c || (sregs->tlimit <= ebase.simtime)) {
 145             icount = 0;
 146             if (sregs->tlimit <= ebase.simtime) sregs->tlimit = -1;
 147         }
 148     }
 149     sregs->tottime += time(NULL) - sregs->starttime;
 150     restore_stdio();
 151     if (sregs->err_mode)
 152         return (ERROR);
 153     if (ctrl_c) {
 154         ctrl_c = 0;
 155         return (CTRL_C);
 156     }
 157     return (TIME_OUT);
 158 }
 159
 160 int
 161 main(argc, argv)
 162     int             argc;
 163     char          **argv;
 164 {
 165
 166     int             cont = 1;
 167     int             stat = 1;
 168     int             freq = 14;
 169     int             copt = 0;
 170
 171     char           *cfile, *bacmd;
 172     char           *cmdq[HIST_LEN];
 173     int             cmdi = 0;
 174     int             i;
 175
 176     cfile = 0;
 177     for (i = 0; i < 64; i++)
 178         cmdq[i] = 0;
 179     printf("\n SIS - SPARC instruction simulator %s,  copyright Jiri Gaisler 1995\n", sis_version);
 180     printf(" Bug-reports to jgais@wd.estec.esa.nl\n\n");
 181     while (stat < argc) {
 182         if (argv[stat][0] == '-') {
 183             if (strcmp(argv[stat], "-v") == 0) {
 184                 sis_verbose = 1;
 185             } else if (strcmp(argv[stat], "-c") == 0) {
 186                 if ((stat + 1) < argc) {
 187                     copt = 1;
 188                     cfile = argv[++stat];
 189                 }
 190             } else if (strcmp(argv[stat], "-nfp") == 0)
 191                 nfp = 1;
 192             else if (strcmp(argv[stat], "-ift") == 0)
 193                 ift = 1;
 194             else if (strcmp(argv[stat], "-wrp") == 0)
 195                 wrp = 1;
 196             else if (strcmp(argv[stat], "-rom8") == 0)
 197                 rom8 = 1;
 198             else if (strcmp(argv[stat], "-uben") == 0)
 199                 uben = 1;
 200             else if (strcmp(argv[stat], "-uart1") == 0) {
 201                 if ((stat + 1) < argc)
 202                     strcpy(uart_dev1, argv[++stat]);
 203             } else if (strcmp(argv[stat], "-uart2") == 0) {
 204                 if ((stat + 1) < argc)
 205                     strcpy(uart_dev2, argv[++stat]);
 206             } else if (strcmp(argv[stat], "-freq") == 0) {
 207                 if ((stat + 1) < argc)
 208                     freq = VAL(argv[++stat]);
 209             } else if (strcmp(argv[stat], "-sparclite") == 0) {
 210                 sparclite = 1;
 211 #ifdef ERA
 212             } else if (strcmp(argv[stat], "-era") == 0) {
 213                 era = 1;
 214 #endif
 215             } else if (strcmp(argv[stat], "-dumbio") == 0) {
 216                 dumbio = 1;
 217             } else {
 218                 printf("unknown option %s\n", argv[stat]);
 219                 usage();
 220                 exit(1);
 221             }
 222         } else {
 223             last_load_addr = bfd_load(argv[stat]);
 224         }
 225         stat++;
 226     }
 227     if (nfp)
 228         printf("FPU disabled\n");
 229 #ifdef ERA
 230     if (era)
 231         printf("ERA ECC emulation enabled\n");
 232 #endif
 233     sregs.freq = freq;
 234
 235     INIT_DISASSEMBLE_INFO(dinfo, stdout, (fprintf_ftype) fprintf);
 236     dinfo.endian = BFD_ENDIAN_BIG;
 237
 238     termsave = fcntl(0, F_GETFL, 0);
 239     using_history();
 240     init_signals();
 241     ebase.simtime = 0;
 242     reset_all();
 243     init_bpt(&sregs);
 244     init_sim();
 245 #ifdef STAT
 246     reset_stat(&sregs);
 247 #endif
 248
 249     if (copt) {
 250         bacmd = (char *) malloc(256);
 251         strcpy(bacmd, "batch ");
 252         strcat(bacmd, cfile);
 253         exec_cmd(&sregs, bacmd);
 254     }
 255     while (cont) {
 256
 257         if (cmdq[cmdi] != 0) {
 258 #if 0
 259             remove_history(cmdq[cmdi]);
 260 #else
 261             remove_history(cmdi);
 262 #endif
 263             free(cmdq[cmdi]);
 264             cmdq[cmdi] = 0;
 265         }
 266         cmdq[cmdi] = readline("sis> ");
 267         if (cmdq[cmdi] && *cmdq[cmdi])
 268             add_history(cmdq[cmdi]);
 269         if (cmdq[cmdi])
 270             stat = exec_cmd(&sregs, cmdq[cmdi]);
 271         else {
 272             puts("\n");
 273             exit(0);
 274         }
 275         switch (stat) {
 276         case OK:
 277             break;
 278         case CTRL_C:
 279             printf("\b\bInterrupt!\n");
 280         case TIME_OUT:
 281             printf(" Stopped at time %d (%.3f ms)\n", ebase.simtime,
 282               ((double) ebase.simtime / (double) sregs.freq) / 1000.0);
 283             break;
 284         case BPT_HIT:
 285             printf("breakpoint at 0x%08x reached\n", sregs.pc);
 286             sregs.bphit = 1;
 287             break;
 288         case ERROR:
 289             printf("IU in error mode (%d)\n", sregs.trap);
 290             stat = 0;
 291             printf(" %8d ", ebase.simtime);
 292             dis_mem(sregs.pc, 1, &dinfo);
 293             break;
 294         default:
 295             break;
 296         }
 297         ctrl_c = 0;
 298         stat = OK;
 299
 300         cmdi = (cmdi + 1) & (HIST_LEN - 1);
 301
 302     }
 303     return 0;
 304 }
 305