sim/erc32/sis.c

   1 /* This file is part of SIS (SPARC instruction simulator)
   2
   3    Copyright (C) 1995-2024 Free Software Foundation, Inc.
   4    Contributed by Jiri Gaisler, European Space Agency
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* This must come before any other includes.  */
  20 #include "defs.h"
  21
  22 #include <signal.h>
  23 #include <string.h>
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <sys/fcntl.h>
  27 #include "sis.h"
  28 #include <dis-asm.h>
  29 #include "sim-config.h"
  30 #include <inttypes.h>
  31
  32 #define VAL(x)  strtol(x,(char **)NULL,0)
  33
  34 /* Structures and functions from readline library */
  35
  36 #include "readline/readline.h"
  37 #include "readline/history.h"
  38
  39 /* Command history buffer length - MUST be binary */
  40 #define HIST_LEN        64
  41
  42 extern struct disassemble_info dinfo;
  43 extern struct pstate sregs;
  44 extern struct estate ebase;
  45
  46 extern int      ctrl_c;
  47 extern int      nfp;
  48 extern int      ift;
  49 extern int      wrp;
  50 extern int      rom8;
  51 extern int      uben;
  52 extern int      sis_verbose;
  53 extern char    *sis_version;
  54 extern struct estate ebase;
  55 extern struct evcell evbuf[];
  56 extern struct irqcell irqarr[];
  57 extern int      irqpend, ext_irl;
  58 extern int      termsave;
  59 extern int      sparclite;
  60 extern int      dumbio;
  61 extern char     uart_dev1[];
  62 extern char     uart_dev2[];
  63 extern uint32_t   last_load_addr;
  64
  65 #ifdef ERA
  66 extern int era;
  67 #endif
  68
  69 int
  70 run_sim(struct pstate *sregs, uint64_t icount, int dis)
  71 {
  72     int             irq, mexc, deb;
  73
  74     sregs->starttime = get_time();
  75     init_stdio();
  76     if (sregs->err_mode) icount = 0;
  77     deb = dis || sregs->histlen || sregs->bptnum;
  78     irq = 0;
  79     while (icount > 0) {
  80
  81         mexc = memory_iread (sregs->pc, &sregs->inst, &sregs->hold);
  82         sregs->icnt = 1;
  83         if (sregs->annul) {
  84             sregs->annul = 0;
  85             sregs->pc = sregs->npc;
  86             sregs->npc = sregs->npc + 4;
  87         } else {
  88             sregs->fhold = 0;
  89             if (ext_irl) irq = check_interrupts(sregs);
  90             if (!irq) {
  91                 if (mexc) {
  92                     sregs->trap = I_ACC_EXC;
  93                 } else {
  94                     if (deb) {
  95                         if ((sregs->bphit = check_bpt(sregs)) != 0) {
  96                             restore_stdio();
  97                             return BPT_HIT;
  98                         }
  99                         if (sregs->histlen) {
 100                             sregs->histbuf[sregs->histind].addr = sregs->pc;
 101                             sregs->histbuf[sregs->histind].time = ebase.simtime;
 102                             sregs->histind++;
 103                             if (sregs->histind >= sregs->histlen)
 104                                 sregs->histind = 0;
 105                         }
 106                         if (dis) {
 107                             printf(" %8" PRIu64 " ", ebase.simtime);
 108                             dis_mem(sregs->pc, 1, &dinfo);
 109                         }
 110                     }
 111                     dispatch_instruction(sregs);
 112                     icount--;
 113                 }
 114             }
 115             if (sregs->trap) {
 116                 irq = 0;
 117                 sregs->err_mode = execute_trap(sregs);
 118                 if (sregs->err_mode) {
 119                     error_mode(sregs->pc);
 120                     icount = 0;
 121                 }
 122             }
 123         }
 124         advance_time(sregs);
 125         if (ctrl_c || (sregs->tlimit <= ebase.simtime)) {
 126             icount = 0;
 127             if (sregs->tlimit <= ebase.simtime) sregs->tlimit = -1;
 128         }
 129     }
 130     sregs->tottime += get_time() - sregs->starttime;
 131     restore_stdio();
 132     if (sregs->err_mode)
 133         return ERROR;
 134     if (ctrl_c) {
 135         ctrl_c = 0;
 136         return CTRL_C;
 137     }
 138     return TIME_OUT;
 139 }
 140
 141 static int ATTRIBUTE_PRINTF (3, 4)
 142 fprintf_styled (void *stream, enum disassembler_style style,
 143                 const char *fmt, ...)
 144 {
 145   int ret;
 146   FILE *out = (FILE *) stream;
 147   va_list args;
 148
 149   va_start (args, fmt);
 150   ret = vfprintf (out, fmt, args);
 151   va_end (args);
 152
 153   return ret;
 154 }
 155
 156 int
 157 main(int argc, char **argv)
 158 {
 159
 160     int             cont = 1;
 161     int             stat = 1;
 162     int             freq = 14;
 163     int             copt = 0;
 164
 165     char           *cfile, *bacmd;
 166     char           *cmdq[HIST_LEN];
 167     int             cmdi = 0;
 168     int             i;
 169     int             lfile = 0;
 170
 171     cfile = 0;
 172     for (i = 0; i < 64; i++)
 173         cmdq[i] = 0;
 174     printf("\n SIS - SPARC instruction simulator %s,  copyright Jiri Gaisler 1995\n", sis_version);
 175     printf(" Bug-reports to jgais@wd.estec.esa.nl\n\n");
 176     while (stat < argc) {
 177         if (argv[stat][0] == '-') {
 178             if (strcmp(argv[stat], "-v") == 0) {
 179                 sis_verbose += 1;
 180             } else if (strcmp(argv[stat], "-c") == 0) {
 181                 if ((stat + 1) < argc) {
 182                     copt = 1;
 183                     cfile = argv[++stat];
 184                 }
 185             } else if (strcmp(argv[stat], "-nfp") == 0)
 186                 nfp = 1;
 187             else if (strcmp(argv[stat], "-ift") == 0)
 188                 ift = 1;
 189             else if (strcmp(argv[stat], "-wrp") == 0)
 190                 wrp = 1;
 191             else if (strcmp(argv[stat], "-rom8") == 0)
 192                 rom8 = 1;
 193             else if (strcmp(argv[stat], "-uben") == 0)
 194                 uben = 1;
 195             else if (strcmp(argv[stat], "-uart1") == 0) {
 196                 if ((stat + 1) < argc)
 197                     strcpy(uart_dev1, argv[++stat]);
 198             } else if (strcmp(argv[stat], "-uart2") == 0) {
 199                 if ((stat + 1) < argc)
 200                     strcpy(uart_dev2, argv[++stat]);
 201             } else if (strcmp(argv[stat], "-freq") == 0) {
 202                 if ((stat + 1) < argc)
 203                     freq = VAL(argv[++stat]);
 204             } else if (strcmp(argv[stat], "-sparclite") == 0) {
 205                 sparclite = 1;
 206 #ifdef ERA
 207             } else if (strcmp(argv[stat], "-era") == 0) {
 208                 era = 1;
 209 #endif
 210             } else if (strcmp(argv[stat], "-dumbio") == 0) {
 211                 dumbio = 1;
 212             } else {
 213                 printf("unknown option %s\n", argv[stat]);
 214                 usage();
 215                 exit(1);
 216             }
 217         } else {
 218             lfile = stat;
 219         }
 220         stat++;
 221     }
 222     if (nfp)
 223         printf("FPU disabled\n");
 224 #ifdef ERA
 225     if (era)
 226         printf("ERA ECC emulation enabled\n");
 227 #endif
 228     sregs.freq = freq;
 229
 230     INIT_DISASSEMBLE_INFO(dinfo, stdout, (fprintf_ftype) fprintf,
 231                           (fprintf_styled_ftype) fprintf_styled);
 232 #ifdef HOST_LITTLE_ENDIAN
 233     dinfo.endian = BFD_ENDIAN_LITTLE;
 234 #else
 235     dinfo.endian = BFD_ENDIAN_BIG;
 236 #endif
 237
 238 #ifdef F_GETFL
 239     termsave = fcntl(0, F_GETFL, 0);
 240 #endif
 241     using_history();
 242     init_signals();
 243     ebase.simtime = 0;
 244     reset_all();
 245     init_bpt(&sregs);
 246     init_sim();
 247     if (lfile)
 248         last_load_addr = bfd_load(argv[lfile]);
 249 #ifdef STAT
 250     reset_stat(&sregs);
 251 #endif
 252
 253     if (copt) {
 254         bacmd = (char *) malloc(256);
 255         strcpy(bacmd, "batch ");
 256         strcat(bacmd, cfile);
 257         exec_cmd(&sregs, bacmd);
 258     }
 259     while (cont) {
 260
 261         if (cmdq[cmdi] != 0) {
 262 #if 0
 263             remove_history(cmdq[cmdi]);
 264 #else
 265             remove_history(cmdi);
 266 #endif
 267             free(cmdq[cmdi]);
 268             cmdq[cmdi] = 0;
 269         }
 270         cmdq[cmdi] = readline("sis> ");
 271         if (cmdq[cmdi] && *cmdq[cmdi])
 272             add_history(cmdq[cmdi]);
 273         if (cmdq[cmdi])
 274             stat = exec_cmd(&sregs, cmdq[cmdi]);
 275         else {
 276             puts("\n");
 277             exit(0);
 278         }
 279         switch (stat) {
 280         case OK:
 281             break;
 282         case CTRL_C:
 283             printf("\b\bInterrupt!\n");
 284             ATTRIBUTE_FALLTHROUGH;
 285         case TIME_OUT:
 286             printf(" Stopped at time %" PRIu64 " (%.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(" %8" PRIu64 " ", 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