gnu/dist/gdb6/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 #define VAL(x)  strtol(x,(char **)NULL,0)
  37
  38 /* Structures and functions from readline library */
  39
  40 typedef struct {
  41   char *line;
  42   char *data;
  43 } HIST_ENTRY;
  44
  45 extern char *   readline PARAMS ((char *prompt));
  46 extern void     using_history PARAMS ((void));
  47 extern void     add_history PARAMS ((char *string));
  48 extern HIST_ENTRY *remove_history PARAMS ((int which));
  49
  50
  51
  52 /* Command history buffer length - MUST be binary */
  53 #define HIST_LEN        64
  54
  55 extern struct disassemble_info dinfo;
  56 extern struct pstate sregs;
  57 extern struct estate ebase;
  58
  59 extern int      ctrl_c;
  60 extern int      nfp;
  61 extern int      ift;
  62 extern int      wrp;
  63 extern int      rom8;
  64 extern int      uben;
  65 extern int      sis_verbose;
  66 extern char    *sis_version;
  67 extern struct estate ebase;
  68 extern struct evcell evbuf[];
  69 extern struct irqcell irqarr[];
  70 extern int      irqpend, ext_irl;
  71 extern int      termsave;
  72 extern int      sparclite;
  73 extern int      dumbio;
  74 extern char     uart_dev1[];
  75 extern char     uart_dev2[];
  76 extern uint32   last_load_addr;
  77
  78 #ifdef ERA
  79 extern int era;
  80 #endif
  81
  82 int
  83 run_sim(sregs, icount, dis)
  84     struct pstate  *sregs;
  85     unsigned int    icount;
  86     int             dis;
  87 {
  88     int             irq, mexc, deb, asi;
  89
  90     sregs->starttime = time(NULL);
  91     init_stdio();
  92     if (sregs->err_mode) icount = 0;
  93     deb = dis || sregs->histlen || sregs->bptnum;
  94     irq = 0;
  95     while (icount > 0) {
  96
  97         if (sregs->psr & 0x080)
  98             asi = 9;
  99         else
 100             asi = 8;
 101         mexc = memory_read(asi, sregs->pc, &sregs->inst, 2, &sregs->hold);
 102         sregs->icnt = 1;
 103         if (sregs->annul) {
 104             sregs->annul = 0;
 105             sregs->pc = sregs->npc;
 106             sregs->npc = sregs->npc + 4;
 107         } else {
 108             sregs->fhold = 0;
 109             if (ext_irl) irq = check_interrupts(sregs);
 110             if (!irq) {
 111                 if (mexc) {
 112                     sregs->trap = I_ACC_EXC;
 113                 } else {
 114                     if (deb) {
 115                         if ((sregs->bphit = check_bpt(sregs)) != 0) {
 116                             restore_stdio();
 117                             return (BPT_HIT);
 118                         }
 119                         if (sregs->histlen) {
 120                             sregs->histbuf[sregs->histind].addr = sregs->pc;
 121                             sregs->histbuf[sregs->histind].time = ebase.simtime;
 122                             sregs->histind++;
 123                             if (sregs->histind >= sregs->histlen)
 124                                 sregs->histind = 0;
 125                         }
 126                         if (dis) {
 127                             printf(" %8u ", ebase.simtime);
 128                             dis_mem(sregs->pc, 1, &dinfo);
 129                         }
 130                     }
 131                     dispatch_instruction(sregs);
 132                     icount--;
 133                 }
 134             }
 135             if (sregs->trap) {
 136                 irq = 0;
 137                 sregs->err_mode = execute_trap(sregs);
 138                 if (sregs->err_mode) {
 139                     error_mode(sregs->pc);
 140                     icount = 0;
 141                 }
 142             }
 143         }
 144         advance_time(sregs);
 145         if (ctrl_c || (sregs->tlimit <= ebase.simtime)) {
 146             icount = 0;
 147             if (sregs->tlimit <= ebase.simtime) sregs->tlimit = -1;
 148         }
 149     }
 150     sregs->tottime += time(NULL) - sregs->starttime;
 151     restore_stdio();
 152     if (sregs->err_mode)
 153         return (ERROR);
 154     if (ctrl_c) {
 155         ctrl_c = 0;
 156         return (CTRL_C);
 157     }
 158     return (TIME_OUT);
 159 }
 160
 161 int
 162 main(argc, argv)
 163     int             argc;
 164     char          **argv;
 165 {
 166
 167     int             cont = 1;
 168     int             stat = 1;
 169     int             freq = 14;
 170     int             copt = 0;
 171
 172     char           *cfile, *bacmd;
 173     char           *cmdq[HIST_LEN];
 174     int             cmdi = 0;
 175     int             i;
 176
 177     cfile = 0;
 178     for (i = 0; i < 64; i++)
 179         cmdq[i] = 0;
 180     printf("\n SIS - SPARC intruction simulator %s,  copyright Jiri Gaisler 1995\n", sis_version);
 181     printf(" Bug-reports to jgais@wd.estec.esa.nl\n\n");
 182     while (stat < argc) {
 183         if (argv[stat][0] == '-') {
 184             if (strcmp(argv[stat], "-v") == 0) {
 185                 sis_verbose = 1;
 186             } else if (strcmp(argv[stat], "-c") == 0) {
 187                 if ((stat + 1) < argc) {
 188                     copt = 1;
 189                     cfile = argv[++stat];
 190                 }
 191             } else if (strcmp(argv[stat], "-nfp") == 0)
 192                 nfp = 1;
 193             else if (strcmp(argv[stat], "-ift") == 0)
 194                 ift = 1;
 195             else if (strcmp(argv[stat], "-wrp") == 0)
 196                 wrp = 1;
 197             else if (strcmp(argv[stat], "-rom8") == 0)
 198                 rom8 = 1;
 199             else if (strcmp(argv[stat], "-uben") == 0)
 200                 uben = 1;
 201             else if (strcmp(argv[stat], "-uart1") == 0) {
 202                 if ((stat + 1) < argc)
 203                     strcpy(uart_dev1, argv[++stat]);
 204             } else if (strcmp(argv[stat], "-uart2") == 0) {
 205                 if ((stat + 1) < argc)
 206                     strcpy(uart_dev2, argv[++stat]);
 207             } else if (strcmp(argv[stat], "-freq") == 0) {
 208                 if ((stat + 1) < argc)
 209                     freq = VAL(argv[++stat]);
 210             } else if (strcmp(argv[stat], "-sparclite") == 0) {
 211                 sparclite = 1;
 212 #ifdef ERA
 213             } else if (strcmp(argv[stat], "-era") == 0) {
 214                 era = 1;
 215 #endif
 216             } else if (strcmp(argv[stat], "-dumbio") == 0) {
 217                 dumbio = 1;
 218             } else {
 219                 printf("unknown option %s\n", argv[stat]);
 220                 usage();
 221                 exit(1);
 222             }
 223         } else {
 224             last_load_addr = bfd_load(argv[stat]);
 225         }
 226         stat++;
 227     }
 228     if (nfp)
 229         printf("FPU disabled\n");
 230 #ifdef ERA
 231     if (era)
 232         printf("ERA ECC emulation enabled\n");
 233 #endif
 234     sregs.freq = freq;
 235
 236     INIT_DISASSEMBLE_INFO(dinfo, stdout, (fprintf_ftype) fprintf);
 237     dinfo.endian = BFD_ENDIAN_BIG;
 238
 239     termsave = fcntl(0, F_GETFL, 0);
 240     using_history();
 241     init_signals();
 242     ebase.simtime = 0;
 243     reset_all();
 244     init_bpt(&sregs);
 245     init_sim();
 246 #ifdef STAT
 247     reset_stat(&sregs);
 248 #endif
 249
 250     if (copt) {
 251         bacmd = (char *) malloc(256);
 252         strcpy(bacmd, "batch ");
 253         strcat(bacmd, cfile);
 254         exec_cmd(&sregs, bacmd);
 255     }
 256     while (cont) {
 257
 258         if (cmdq[cmdi] != 0) {
 259 #if 0
 260             remove_history(cmdq[cmdi]);
 261 #else
 262             remove_history(cmdi);
 263 #endif
 264             free(cmdq[cmdi]);
 265             cmdq[cmdi] = 0;
 266         }
 267         cmdq[cmdi] = readline("sis> ");
 268         if (cmdq[cmdi] && *cmdq[cmdi])
 269             add_history(cmdq[cmdi]);
 270         if (cmdq[cmdi])
 271             stat = exec_cmd(&sregs, cmdq[cmdi]);
 272         else {
 273             puts("\n");
 274             exit(0);
 275         }
 276         switch (stat) {
 277         case OK:
 278             break;
 279         case CTRL_C:
 280             printf("\b\bInterrupt!\n");
 281         case TIME_OUT:
 282             printf(" Stopped at time %d (%.3f ms)\n", ebase.simtime,
 283               ((double) ebase.simtime / (double) sregs.freq) / 1000.0);
 284             break;
 285         case BPT_HIT:
 286             printf("breakpoint at 0x%08x reached\n", sregs.pc);
 287             sregs.bphit = 1;
 288             break;
 289         case ERROR:
 290             printf("IU in error mode (%d)\n", sregs.trap);
 291             stat = 0;
 292             printf(" %8d ", ebase.simtime);
 293             dis_mem(sregs.pc, 1, &dinfo);
 294             break;
 295         default:
 296             break;
 297         }
 298         ctrl_c = 0;
 299         stat = OK;
 300
 301         cmdi = (cmdi + 1) & (HIST_LEN - 1);
 302
 303     }
 304     return 0;
 305 }
 306