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 2 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, write to the Free Software Foundation, Inc., 675
  19  * Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #include "config.h"
  24 #include <signal.h>
  25 #include <string.h>
  26 #ifdef HAVE_STDLIB_H
  27 #include <stdlib.h>
  28 #endif
  29 #include <stdio.h>
  30 #include <time.h>
  31 #include <sys/fcntl.h>
  32 #include "sis.h"
  33 #include <dis-asm.h>
  34 #include "sim-config.h"
  35
  36 #ifndef fprintf
  37 extern          fprintf();
  38 #endif
  39
  40 #define VAL(x)  strtol(x,(char **)NULL,0)
  41
  42 /* Structures and functions from readline library */
  43
  44 typedef struct {
  45   char *line;
  46   char *data;
  47 } HIST_ENTRY;
  48
  49 extern char *   readline PARAMS ((char *prompt));
  50 extern void     using_history PARAMS ((void));
  51 extern void     add_history PARAMS ((char *string));
  52 extern HIST_ENTRY *remove_history PARAMS ((int which));
  53
  54
  55
  56 /* Command history buffer length - MUST be binary */
  57 #define HIST_LEN        64
  58
  59 extern struct disassemble_info dinfo;
  60 extern struct pstate sregs;
  61 extern struct estate ebase;
  62
  63 extern int      ctrl_c;
  64 extern int      nfp;
  65 extern int      ift;
  66 extern int      wrp;
  67 extern int      rom8;
  68 extern int      uben;
  69 extern int      sis_verbose;
  70 extern char    *sis_version;
  71 extern struct estate ebase;
  72 extern struct evcell evbuf[];
  73 extern struct irqcell irqarr[];
  74 extern int      irqpend, ext_irl;
  75 extern int      termsave;
  76 extern int      sparclite;
  77 extern int      dumbio;
  78 extern char     uart_dev1[];
  79 extern char     uart_dev2[];
  80 extern uint32   last_load_addr;
  81
  82 #ifdef ERA
  83 extern int era;
  84 #endif
  85
  86 int
  87 run_sim(sregs, icount, dis)
  88     struct pstate  *sregs;
  89     unsigned int    icount;
  90     int             dis;
  91 {
  92     int             irq, mexc, deb, asi;
  93
  94     sregs->starttime = time(NULL);
  95     init_stdio();
  96     if (sregs->err_mode) icount = 0;
  97     deb = dis || sregs->histlen || sregs->bptnum;
  98     irq = 0;
  99     while (icount > 0) {
 100
 101         if (sregs->psr & 0x080)
 102             asi = 9;
 103         else
 104             asi = 8;
 105         mexc = memory_read(asi, sregs->pc, &sregs->inst, 2, &sregs->hold);
 106         sregs->icnt = 1;
 107         if (sregs->annul) {
 108             sregs->annul = 0;
 109             sregs->pc = sregs->npc;
 110             sregs->npc = sregs->npc + 4;
 111         } else {
 112             sregs->fhold = 0;
 113             if (ext_irl) irq = check_interrupts(sregs);
 114             if (!irq) {
 115                 if (mexc) {
 116                     sregs->trap = I_ACC_EXC;
 117                 } else {
 118                     if (deb) {
 119                         if ((sregs->bphit = check_bpt(sregs)) != 0) {
 120                             restore_stdio();
 121                             return (BPT_HIT);
 122                         }
 123                         if (sregs->histlen) {
 124                             sregs->histbuf[sregs->histind].addr = sregs->pc;
 125                             sregs->histbuf[sregs->histind].time = ebase.simtime;
 126                             sregs->histind++;
 127                             if (sregs->histind >= sregs->histlen)
 128                                 sregs->histind = 0;
 129                         }
 130                         if (dis) {
 131                             printf(" %8u ", ebase.simtime);
 132                             dis_mem(sregs->pc, 1, &dinfo);
 133                         }
 134                     }
 135                     dispatch_instruction(sregs);
 136                     icount--;
 137                 }
 138             }
 139             if (sregs->trap) {
 140                 irq = 0;
 141                 sregs->err_mode = execute_trap(sregs);
 142                 if (sregs->err_mode) {
 143                     error_mode(sregs->pc);
 144                     icount = 0;
 145                 }
 146             }
 147         }
 148         advance_time(sregs);
 149         if (ctrl_c || (sregs->tlimit <= ebase.simtime)) {
 150             icount = 0;
 151             if (sregs->tlimit <= ebase.simtime) sregs->tlimit = -1;
 152         }
 153     }
 154     sregs->tottime += time(NULL) - sregs->starttime;
 155     restore_stdio();
 156     if (sregs->err_mode)
 157         return (ERROR);
 158     if (ctrl_c) {
 159         ctrl_c = 0;
 160         return (CTRL_C);
 161     }
 162     return (TIME_OUT);
 163 }
 164
 165 int
 166 main(argc, argv)
 167     int             argc;
 168     char          **argv;
 169 {
 170
 171     int             cont = 1;
 172     int             stat = 1;
 173     int             freq = 14;
 174     int             copt = 0;
 175
 176     char           *cfile, *bacmd;
 177     char           *cmdq[HIST_LEN];
 178     int             cmdi = 0;
 179     int             i;
 180
 181     cfile = 0;
 182     for (i = 0; i < 64; i++)
 183         cmdq[i] = 0;
 184     printf("\n SIS - SPARC intruction simulator %s,  copyright Jiri Gaisler 1995\n", sis_version);
 185     printf(" Bug-reports to jgais@wd.estec.esa.nl\n\n");
 186     while (stat < argc) {
 187         if (argv[stat][0] == '-') {
 188             if (strcmp(argv[stat], "-v") == 0) {
 189                 sis_verbose = 1;
 190             } else if (strcmp(argv[stat], "-c") == 0) {
 191                 if ((stat + 1) < argc) {
 192                     copt = 1;
 193                     cfile = argv[++stat];
 194                 }
 195             } else if (strcmp(argv[stat], "-nfp") == 0)
 196                 nfp = 1;
 197             else if (strcmp(argv[stat], "-ift") == 0)
 198                 ift = 1;
 199             else if (strcmp(argv[stat], "-wrp") == 0)
 200                 wrp = 1;
 201             else if (strcmp(argv[stat], "-rom8") == 0)
 202                 rom8 = 1;
 203             else if (strcmp(argv[stat], "-uben") == 0)
 204                 uben = 1;
 205             else if (strcmp(argv[stat], "-uart1") == 0) {
 206                 if ((stat + 1) < argc)
 207                     strcpy(uart_dev1, argv[++stat]);
 208             } else if (strcmp(argv[stat], "-uart2") == 0) {
 209                 if ((stat + 1) < argc)
 210                     strcpy(uart_dev2, argv[++stat]);
 211             } else if (strcmp(argv[stat], "-freq") == 0) {
 212                 if ((stat + 1) < argc)
 213                     freq = VAL(argv[++stat]);
 214             } else if (strcmp(argv[stat], "-sparclite") == 0) {
 215                 sparclite = 1;
 216 #ifdef ERA
 217             } else if (strcmp(argv[stat], "-era") == 0) {
 218                 era = 1;
 219 #endif
 220             } else if (strcmp(argv[stat], "-dumbio") == 0) {
 221                 dumbio = 1;
 222             } else {
 223                 printf("unknown option %s\n", argv[stat]);
 224                 usage();
 225                 exit(1);
 226             }
 227         } else {
 228             last_load_addr = bfd_load(argv[stat]);
 229         }
 230         stat++;
 231     }
 232     if (nfp)
 233         printf("FPU disabled\n");
 234 #ifdef ERA
 235     if (era)
 236         printf("ERA ECC emulation enabled\n");
 237 #endif
 238     sregs.freq = freq;
 239
 240     INIT_DISASSEMBLE_INFO(dinfo, stdout, (fprintf_ftype) fprintf);
 241     dinfo.endian = BFD_ENDIAN_BIG;
 242
 243     termsave = fcntl(0, F_GETFL, 0);
 244     using_history();
 245     init_signals();
 246     ebase.simtime = 0;
 247     reset_all();
 248     init_bpt(&sregs);
 249     init_sim();
 250 #ifdef STAT
 251     reset_stat(&sregs);
 252 #endif
 253
 254     if (copt) {
 255         bacmd = (char *) malloc(256);
 256         strcpy(bacmd, "batch ");
 257         strcat(bacmd, cfile);
 258         exec_cmd(&sregs, bacmd);
 259     }
 260     while (cont) {
 261
 262         if (cmdq[cmdi] != 0) {
 263 #if 0
 264             remove_history(cmdq[cmdi]);
 265 #else
 266             remove_history(cmdi);
 267 #endif
 268             free(cmdq[cmdi]);
 269             cmdq[cmdi] = 0;
 270         }
 271         cmdq[cmdi] = readline("sis> ");
 272         if (cmdq[cmdi] && *cmdq[cmdi])
 273             add_history(cmdq[cmdi]);
 274         if (cmdq[cmdi])
 275             stat = exec_cmd(&sregs, cmdq[cmdi]);
 276         else {
 277             puts("\n");
 278             exit(0);
 279         }
 280         switch (stat) {
 281         case OK:
 282             break;
 283         case CTRL_C:
 284             printf("\b\bInterrupt!\n");
 285         case TIME_OUT:
 286             printf(" Stopped at time %d (%.3f ms)\n", ebase.simtime,
 287               ((double) ebase.simtime / (double) sregs.freq) / 1000.0);
 288             break;
 289         case BPT_HIT:
 290             printf("breakpoint at 0x%08x reached\n", sregs.pc);
 291             sregs.bphit = 1;
 292             break;
 293         case ERROR:
 294             printf("IU in error mode (%d)\n", sregs.trap);
 295             stat = 0;
 296             printf(" %8d ", ebase.simtime);
 297             dis_mem(sregs.pc, 1, &dinfo);
 298             break;
 299         default:
 300             break;
 301         }
 302         ctrl_c = 0;
 303         stat = OK;
 304
 305         cmdi = (cmdi + 1) & (HIST_LEN - 1);
 306
 307     }
 308     return 0;
 309 }
 310