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 <sys/fcntl.h>
  30 #include "sis.h"
  31 #include <dis-asm.h>
  32 #include "sim-config.h"
  33
  34 #define VAL(x)  strtol(x,(char **)NULL,0)
  35
  36 /* Structures and functions from readline library */
  37
  38 typedef struct {
  39   char *line;
  40   char *data;
  41 } HIST_ENTRY;
  42
  43 extern char *   readline (char *prompt);
  44 extern void     using_history (void);
  45 extern void     add_history (char *string);
  46 extern HIST_ENTRY *remove_history (int which);
  47
  48
  49
  50 /* Command history buffer length - MUST be binary */
  51 #define HIST_LEN        64
  52
  53 extern struct disassemble_info dinfo;
  54 extern struct pstate sregs;
  55 extern struct estate ebase;
  56
  57 extern int      ctrl_c;
  58 extern int      nfp;
  59 extern int      ift;
  60 extern int      wrp;
  61 extern int      rom8;
  62 extern int      uben;
  63 extern int      sis_verbose;
  64 extern char    *sis_version;
  65 extern struct estate ebase;
  66 extern struct evcell evbuf[];
  67 extern struct irqcell irqarr[];
  68 extern int      irqpend, ext_irl;
  69 extern int      termsave;
  70 extern int      sparclite;
  71 extern int      dumbio;
  72 extern char     uart_dev1[];
  73 extern char     uart_dev2[];
  74 extern uint32   last_load_addr;
  75
  76 #ifdef ERA
  77 extern int era;
  78 #endif
  79
  80 int
  81 run_sim(sregs, icount, dis)
  82     struct pstate  *sregs;
  83     uint64          icount;
  84     int             dis;
  85 {
  86     int             irq, mexc, deb, asi;
  87
  88     sregs->starttime = get_time();
  89     init_stdio();
  90     if (sregs->err_mode) icount = 0;
  91     deb = dis || sregs->histlen || sregs->bptnum;
  92     irq = 0;
  93     while (icount > 0) {
  94
  95         if (sregs->psr & 0x080)
  96             asi = 9;
  97         else
  98             asi = 8;
  99         mexc = memory_read(asi, sregs->pc, &sregs->inst, 2, &sregs->hold);
 100         sregs->icnt = 1;
 101         if (sregs->annul) {
 102             sregs->annul = 0;
 103             sregs->pc = sregs->npc;
 104             sregs->npc = sregs->npc + 4;
 105         } else {
 106             sregs->fhold = 0;
 107             if (ext_irl) irq = check_interrupts(sregs);
 108             if (!irq) {
 109                 if (mexc) {
 110                     sregs->trap = I_ACC_EXC;
 111                 } else {
 112                     if (deb) {
 113                         if ((sregs->bphit = check_bpt(sregs)) != 0) {
 114                             restore_stdio();
 115                             return (BPT_HIT);
 116                         }
 117                         if (sregs->histlen) {
 118                             sregs->histbuf[sregs->histind].addr = sregs->pc;
 119                             sregs->histbuf[sregs->histind].time = ebase.simtime;
 120                             sregs->histind++;
 121                             if (sregs->histind >= sregs->histlen)
 122                                 sregs->histind = 0;
 123                         }
 124                         if (dis) {
 125                             printf(" %8u ", ebase.simtime);
 126                             dis_mem(sregs->pc, 1, &dinfo);
 127                         }
 128                     }
 129                     dispatch_instruction(sregs);
 130                     icount--;
 131                 }
 132             }
 133             if (sregs->trap) {
 134                 irq = 0;
 135                 sregs->err_mode = execute_trap(sregs);
 136                 if (sregs->err_mode) {
 137                     error_mode(sregs->pc);
 138                     icount = 0;
 139                 }
 140             }
 141         }
 142         advance_time(sregs);
 143         if (ctrl_c || (sregs->tlimit <= ebase.simtime)) {
 144             icount = 0;
 145             if (sregs->tlimit <= ebase.simtime) sregs->tlimit = -1;
 146         }
 147     }
 148     sregs->tottime += get_time() - sregs->starttime;
 149     restore_stdio();
 150     if (sregs->err_mode)
 151         return (ERROR);
 152     if (ctrl_c) {
 153         ctrl_c = 0;
 154         return (CTRL_C);
 155     }
 156     return (TIME_OUT);
 157 }
 158
 159 int
 160 main(argc, argv)
 161     int             argc;
 162     char          **argv;
 163 {
 164
 165     int             cont = 1;
 166     int             stat = 1;
 167     int             freq = 14;
 168     int             copt = 0;
 169
 170     char           *cfile, *bacmd;
 171     char           *cmdq[HIST_LEN];
 172     int             cmdi = 0;
 173     int             i;
 174
 175     cfile = 0;
 176     for (i = 0; i < 64; i++)
 177         cmdq[i] = 0;
 178     printf("\n SIS - SPARC instruction simulator %s,  copyright Jiri Gaisler 1995\n", sis_version);
 179     printf(" Bug-reports to jgais@wd.estec.esa.nl\n\n");
 180     while (stat < argc) {
 181         if (argv[stat][0] == '-') {
 182             if (strcmp(argv[stat], "-v") == 0) {
 183                 sis_verbose = 1;
 184             } else if (strcmp(argv[stat], "-c") == 0) {
 185                 if ((stat + 1) < argc) {
 186                     copt = 1;
 187                     cfile = argv[++stat];
 188                 }
 189             } else if (strcmp(argv[stat], "-nfp") == 0)
 190                 nfp = 1;
 191             else if (strcmp(argv[stat], "-ift") == 0)
 192                 ift = 1;
 193             else if (strcmp(argv[stat], "-wrp") == 0)
 194                 wrp = 1;
 195             else if (strcmp(argv[stat], "-rom8") == 0)
 196                 rom8 = 1;
 197             else if (strcmp(argv[stat], "-uben") == 0)
 198                 uben = 1;
 199             else if (strcmp(argv[stat], "-uart1") == 0) {
 200                 if ((stat + 1) < argc)
 201                     strcpy(uart_dev1, argv[++stat]);
 202             } else if (strcmp(argv[stat], "-uart2") == 0) {
 203                 if ((stat + 1) < argc)
 204                     strcpy(uart_dev2, argv[++stat]);
 205             } else if (strcmp(argv[stat], "-freq") == 0) {
 206                 if ((stat + 1) < argc)
 207                     freq = VAL(argv[++stat]);
 208             } else if (strcmp(argv[stat], "-sparclite") == 0) {
 209                 sparclite = 1;
 210 #ifdef ERA
 211             } else if (strcmp(argv[stat], "-era") == 0) {
 212                 era = 1;
 213 #endif
 214             } else if (strcmp(argv[stat], "-dumbio") == 0) {
 215                 dumbio = 1;
 216             } else {
 217                 printf("unknown option %s\n", argv[stat]);
 218                 usage();
 219                 exit(1);
 220             }
 221         } else {
 222             last_load_addr = bfd_load(argv[stat]);
 223         }
 224         stat++;
 225     }
 226     if (nfp)
 227         printf("FPU disabled\n");
 228 #ifdef ERA
 229     if (era)
 230         printf("ERA ECC emulation enabled\n");
 231 #endif
 232     sregs.freq = freq;
 233
 234     INIT_DISASSEMBLE_INFO(dinfo, stdout, (fprintf_ftype) fprintf);
 235     dinfo.endian = BFD_ENDIAN_BIG;
 236
 237     termsave = fcntl(0, F_GETFL, 0);
 238     using_history();
 239     init_signals();
 240     ebase.simtime = 0;
 241     reset_all();
 242     init_bpt(&sregs);
 243     init_sim();
 244 #ifdef STAT
 245     reset_stat(&sregs);
 246 #endif
 247
 248     if (copt) {
 249         bacmd = (char *) malloc(256);
 250         strcpy(bacmd, "batch ");
 251         strcat(bacmd, cfile);
 252         exec_cmd(&sregs, bacmd);
 253     }
 254     while (cont) {
 255
 256         if (cmdq[cmdi] != 0) {
 257 #if 0
 258             remove_history(cmdq[cmdi]);
 259 #else
 260             remove_history(cmdi);
 261 #endif
 262             free(cmdq[cmdi]);
 263             cmdq[cmdi] = 0;
 264         }
 265         cmdq[cmdi] = readline("sis> ");
 266         if (cmdq[cmdi] && *cmdq[cmdi])
 267             add_history(cmdq[cmdi]);
 268         if (cmdq[cmdi])
 269             stat = exec_cmd(&sregs, cmdq[cmdi]);
 270         else {
 271             puts("\n");
 272             exit(0);
 273         }
 274         switch (stat) {
 275         case OK:
 276             break;
 277         case CTRL_C:
 278             printf("\b\bInterrupt!\n");
 279         case TIME_OUT:
 280             printf(" Stopped at time %d (%.3f ms)\n", ebase.simtime,
 281               ((double) ebase.simtime / (double) sregs.freq) / 1000.0);
 282             break;
 283         case BPT_HIT:
 284             printf("breakpoint at 0x%08x reached\n", sregs.pc);
 285             sregs.bphit = 1;
 286             break;
 287         case ERROR:
 288             printf("IU in error mode (%d)\n", sregs.trap);
 289             stat = 0;
 290             printf(" %8d ", ebase.simtime);
 291             dis_mem(sregs.pc, 1, &dinfo);
 292             break;
 293         default:
 294             break;
 295         }
 296         ctrl_c = 0;
 297         stat = OK;
 298
 299         cmdi = (cmdi + 1) & (HIST_LEN - 1);
 300
 301     }
 302     return 0;
 303 }
 304