| 1 | /* This file is part of the program psim. |
| 2 | |
| 3 | Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au> |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 2 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the Free Software |
| 17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | |
| 19 | */ |
| 20 | |
| 21 | |
| 22 | #ifndef _PSIM_C_ |
| 23 | #define _PSIM_C_ |
| 24 | |
| 25 | #include "cpu.h" /* includes psim.h */ |
| 26 | #include "idecode.h" |
| 27 | #include "options.h" |
| 28 | |
| 29 | #include "tree.h" |
| 30 | |
| 31 | #include <signal.h> |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | #include <ctype.h> |
| 35 | |
| 36 | #ifdef HAVE_STDLIB_H |
| 37 | #include <stdlib.h> |
| 38 | #endif |
| 39 | |
| 40 | #include <setjmp.h> |
| 41 | |
| 42 | #ifdef HAVE_STRING_H |
| 43 | #include <string.h> |
| 44 | #else |
| 45 | #ifdef HAVE_STRINGS_H |
| 46 | #include <strings.h> |
| 47 | #endif |
| 48 | #endif |
| 49 | |
| 50 | |
| 51 | #include "bfd.h" |
| 52 | |
| 53 | |
| 54 | /* system structure, actual size of processor array determined at |
| 55 | runtime */ |
| 56 | |
| 57 | struct _psim { |
| 58 | event_queue *events; |
| 59 | device *devices; |
| 60 | mon *monitor; |
| 61 | os_emul *os_emulation; |
| 62 | core *memory; |
| 63 | |
| 64 | /* escape routine for inner functions */ |
| 65 | void *path_to_halt; |
| 66 | void *path_to_restart; |
| 67 | |
| 68 | /* status from last halt */ |
| 69 | psim_status halt_status; |
| 70 | |
| 71 | /* the processors proper */ |
| 72 | int nr_cpus; |
| 73 | int last_cpu; /* CPU that last (tried to) execute an instruction */ |
| 74 | cpu *processors[MAX_NR_PROCESSORS]; |
| 75 | }; |
| 76 | |
| 77 | |
| 78 | int current_target_byte_order; |
| 79 | int current_host_byte_order; |
| 80 | int current_environment; |
| 81 | int current_alignment; |
| 82 | int current_floating_point; |
| 83 | int current_model_issue = MODEL_ISSUE_IGNORE; |
| 84 | int current_stdio = DO_USE_STDIO; |
| 85 | model_enum current_model = WITH_DEFAULT_MODEL; |
| 86 | |
| 87 | |
| 88 | /* create the device tree */ |
| 89 | |
| 90 | INLINE_PSIM\ |
| 91 | (device *) |
| 92 | psim_tree(void) |
| 93 | { |
| 94 | device *root = tree_parse(NULL, "core"); |
| 95 | tree_parse(root, "/aliases"); |
| 96 | tree_parse(root, "/options"); |
| 97 | tree_parse(root, "/chosen"); |
| 98 | tree_parse(root, "/packages"); |
| 99 | tree_parse(root, "/cpus"); |
| 100 | tree_parse(root, "/openprom"); |
| 101 | tree_parse(root, "/openprom/init"); |
| 102 | tree_parse(root, "/openprom/trace"); |
| 103 | tree_parse(root, "/openprom/options"); |
| 104 | return root; |
| 105 | } |
| 106 | |
| 107 | STATIC_INLINE_PSIM\ |
| 108 | (char *) |
| 109 | find_arg(char *err_msg, |
| 110 | int *ptr_to_argp, |
| 111 | char **argv) |
| 112 | { |
| 113 | *ptr_to_argp += 1; |
| 114 | if (argv[*ptr_to_argp] == NULL) |
| 115 | error(err_msg); |
| 116 | return argv[*ptr_to_argp]; |
| 117 | } |
| 118 | |
| 119 | INLINE_PSIM\ |
| 120 | (void) |
| 121 | psim_usage(int verbose) |
| 122 | { |
| 123 | printf_filtered("Usage:\n"); |
| 124 | printf_filtered("\n"); |
| 125 | printf_filtered("\tpsim [ <psim-option> ... ] <image> [ <image-arg> ... ]\n"); |
| 126 | printf_filtered("\n"); |
| 127 | printf_filtered("Where\n"); |
| 128 | printf_filtered("\n"); |
| 129 | printf_filtered("\t<image> Name of the PowerPC program to run.\n"); |
| 130 | if (verbose) { |
| 131 | printf_filtered("\t This can either be a PowerPC binary or\n"); |
| 132 | printf_filtered("\t a text file containing a device tree\n"); |
| 133 | printf_filtered("\t specification.\n"); |
| 134 | printf_filtered("\t PSIM will attempt to determine from the\n"); |
| 135 | printf_filtered("\t specified <image> the intended emulation\n"); |
| 136 | printf_filtered("\t environment.\n"); |
| 137 | printf_filtered("\t If PSIM gets it wrong, the emulation\n"); |
| 138 | printf_filtered("\t environment can be specified using the\n"); |
| 139 | printf_filtered("\t `-e' option (described below).\n"); |
| 140 | printf_filtered("\n"); } |
| 141 | printf_filtered("\t<image-arg> Argument to be passed to <image>\n"); |
| 142 | if (verbose) { |
| 143 | printf_filtered("\t These arguments will be passed to\n"); |
| 144 | printf_filtered("\t <image> (as standard C argv, argc)\n"); |
| 145 | printf_filtered("\t when <image> is started.\n"); |
| 146 | printf_filtered("\n"); } |
| 147 | printf_filtered("\t<psim-option> See below\n"); |
| 148 | printf_filtered("\n"); |
| 149 | printf_filtered("The following are valid <psim-option>s:\n"); |
| 150 | printf_filtered("\n"); |
| 151 | |
| 152 | printf_filtered("\t-c <count> Limit the simulation to <count> iterations\n"); |
| 153 | if (verbose) { |
| 154 | printf_filtered("\n"); |
| 155 | } |
| 156 | |
| 157 | printf_filtered("\t-i or -i2 Print instruction counting statistics\n"); |
| 158 | if (verbose) { |
| 159 | printf_filtered("\t Specify -i2 for a more detailed display\n"); |
| 160 | printf_filtered("\n"); |
| 161 | } |
| 162 | |
| 163 | printf_filtered("\t-I Print execution unit statistics\n"); |
| 164 | if (verbose) { printf_filtered("\n"); } |
| 165 | |
| 166 | printf_filtered("\t-e <os-emul> specify an OS or platform to model\n"); |
| 167 | if (verbose) { |
| 168 | printf_filtered("\t Can be any of the following:\n"); |
| 169 | printf_filtered("\t bug - OEA + MOTO BUG ROM calls\n"); |
| 170 | printf_filtered("\t netbsd - UEA + NetBSD system calls\n"); |
| 171 | printf_filtered("\t solaris - UEA + Solaris system calls\n"); |
| 172 | printf_filtered("\t linux - UEA + Linux system calls\n"); |
| 173 | printf_filtered("\t chirp - OEA + a few OpenBoot calls\n"); |
| 174 | printf_filtered("\n"); } |
| 175 | |
| 176 | printf_filtered("\t-E <endian> Specify the endianness of the target\n"); |
| 177 | if (verbose) { |
| 178 | printf_filtered("\t Can be any of the following:\n"); |
| 179 | printf_filtered("\t big - big endian target\n"); |
| 180 | printf_filtered("\t little - little endian target\n"); |
| 181 | printf_filtered("\n"); } |
| 182 | |
| 183 | printf_filtered("\t-f <file> Merge <file> into the device tree\n"); |
| 184 | if (verbose) { printf_filtered("\n"); } |
| 185 | |
| 186 | printf_filtered("\t-h -? -H give more detailed usage\n"); |
| 187 | if (verbose) { printf_filtered("\n"); } |
| 188 | |
| 189 | printf_filtered("\t-m <model> Specify the processor to model (604)\n"); |
| 190 | if (verbose) { |
| 191 | printf_filtered("\t Selects the processor to use when\n"); |
| 192 | printf_filtered("\t modeling execution units. Includes:\n"); |
| 193 | printf_filtered("\t 604, 603 and 603e\n"); |
| 194 | printf_filtered("\n"); } |
| 195 | |
| 196 | printf_filtered("\t-n <nr-smp> Specify the number of processors in SMP simulations\n"); |
| 197 | if (verbose) { |
| 198 | printf_filtered("\t Specifies the number of processors that are\n"); |
| 199 | printf_filtered("\t to be modeled in a symetric multi-processor (SMP)\n"); |
| 200 | printf_filtered("\t simulation\n"); |
| 201 | printf_filtered("\n"); } |
| 202 | |
| 203 | printf_filtered("\t-o <dev-spec> Add device <dev-spec> to the device tree\n"); |
| 204 | if (verbose) { printf_filtered("\n"); } |
| 205 | |
| 206 | printf_filtered("\t-r <ram-size> Set RAM size in bytes (OEA environments)\n"); |
| 207 | if (verbose) { printf_filtered("\n"); } |
| 208 | |
| 209 | printf_filtered("\t-t [!]<trace> Enable (disable) <trace> option\n"); |
| 210 | if (verbose) { printf_filtered("\n"); } |
| 211 | |
| 212 | printf_filtered("\n"); |
| 213 | trace_usage(verbose); |
| 214 | device_usage(verbose); |
| 215 | if (verbose > 1) { |
| 216 | printf_filtered("\n"); |
| 217 | print_options(); |
| 218 | } |
| 219 | error(""); |
| 220 | } |
| 221 | |
| 222 | /* Test "string" for containing a string of digits that form a number |
| 223 | between "min" and "max". The return value is the number of "err". */ |
| 224 | static |
| 225 | int is_num( char *string, int min, int max, int err) |
| 226 | { |
| 227 | int result = 0; |
| 228 | |
| 229 | for ( ; *string; ++string) |
| 230 | { |
| 231 | if (!isdigit(*string)) |
| 232 | { |
| 233 | result = err; |
| 234 | break; |
| 235 | } |
| 236 | result = result * 10 + (*string - '0'); |
| 237 | } |
| 238 | if (result < min || result > max) |
| 239 | result = err; |
| 240 | |
| 241 | return result; |
| 242 | } |
| 243 | |
| 244 | INLINE_PSIM\ |
| 245 | (char **) |
| 246 | psim_options(device *root, |
| 247 | char **argv) |
| 248 | { |
| 249 | device *current = root; |
| 250 | int argp; |
| 251 | if (argv == NULL) |
| 252 | return NULL; |
| 253 | argp = 0; |
| 254 | while (argv[argp] != NULL && argv[argp][0] == '-') { |
| 255 | char *p = argv[argp] + 1; |
| 256 | char *param; |
| 257 | while (*p != '\0') { |
| 258 | switch (*p) { |
| 259 | default: |
| 260 | psim_usage(0); |
| 261 | error (""); |
| 262 | break; |
| 263 | case 'c': |
| 264 | param = find_arg("Missing <count> option for -c (max-iterations)\n", &argp, argv); |
| 265 | tree_parse(root, "/openprom/options/max-iterations %s", param); |
| 266 | break; |
| 267 | case 'e': |
| 268 | param = find_arg("Missing <emul> option for -e (os-emul)\n", &argp, argv); |
| 269 | tree_parse(root, "/openprom/options/os-emul %s", param); |
| 270 | break; |
| 271 | case 'E': |
| 272 | /* endian spec, ignored for now */ |
| 273 | param = find_arg("Missing <endian> option for -E (target-endian)\n", &argp, argv); |
| 274 | if (strcmp (param, "big") == 0) |
| 275 | tree_parse (root, "/options/little-endian? false"); |
| 276 | else if (strcmp (param, "little") == 0) |
| 277 | tree_parse (root, "/options/little-endian? true"); |
| 278 | else |
| 279 | { |
| 280 | printf_filtered ("Invalid <endian> option for -E (target-endian)\n"); |
| 281 | psim_usage (0); |
| 282 | } |
| 283 | break; |
| 284 | case 'f': |
| 285 | param = find_arg("Missing <file> option for -f\n", &argp, argv); |
| 286 | psim_merge_device_file(root, param); |
| 287 | break; |
| 288 | case 'h': |
| 289 | case '?': |
| 290 | psim_usage(1); |
| 291 | break; |
| 292 | case 'H': |
| 293 | psim_usage(2); |
| 294 | break; |
| 295 | case 'i': |
| 296 | if (isdigit(p[1])) { |
| 297 | tree_parse(root, "/openprom/trace/print-info %c", p[1]); |
| 298 | p++; |
| 299 | } |
| 300 | else { |
| 301 | tree_parse(root, "/openprom/trace/print-info 1"); |
| 302 | } |
| 303 | break; |
| 304 | case 'I': |
| 305 | tree_parse(root, "/openprom/trace/print-info 2"); |
| 306 | tree_parse(root, "/openprom/options/model-issue %d", |
| 307 | MODEL_ISSUE_PROCESS); |
| 308 | break; |
| 309 | case 'm': |
| 310 | param = find_arg("Missing <model> option for -m (model)\n", &argp, argv); |
| 311 | tree_parse(root, "/openprom/options/model \"%s", param); |
| 312 | break; |
| 313 | case 'n': |
| 314 | param = find_arg("Missing <nr-smp> option for -n (smp)\n", &argp, argv); |
| 315 | tree_parse(root, "/openprom/options/smp %s", param); |
| 316 | break; |
| 317 | case 'o': |
| 318 | param = find_arg("Missing <dev-spec> option for -o\n", &argp, argv); |
| 319 | #ifdef WITH_OPTION_MPC860C0 |
| 320 | if (memcmp(param, "mpc860c0", 8) == 0) |
| 321 | { |
| 322 | if (param[8] == '\0') |
| 323 | tree_parse(root, "/options/mpc860c0 5"); |
| 324 | else if (param[8] == '=' && is_num(param+9, 1, 10, 0)) |
| 325 | { |
| 326 | tree_parse(root, "/options/mpc860c0 %s", param+9); |
| 327 | } |
| 328 | else error("Invalid mpc860c0 option for -o\n"); |
| 329 | } |
| 330 | else |
| 331 | #endif // WITH_OPTION_MPC860C0 |
| 332 | current = tree_parse(current, "%s", param); |
| 333 | break; |
| 334 | case 'r': |
| 335 | param = find_arg("Missing <ram-size> option for -r (oea-memory-size)\n", &argp, argv); |
| 336 | tree_parse(root, "/openprom/options/oea-memory-size %s", |
| 337 | param); |
| 338 | break; |
| 339 | case 't': |
| 340 | param = find_arg("Missing <trace> option for -t (trace/*)\n", &argp, argv); |
| 341 | if (param[0] == '!') |
| 342 | tree_parse(root, "/openprom/trace/%s 0", param+1); |
| 343 | else |
| 344 | tree_parse(root, "/openprom/trace/%s 1", param); |
| 345 | break; |
| 346 | } |
| 347 | p += 1; |
| 348 | } |
| 349 | argp += 1; |
| 350 | } |
| 351 | /* force the trace node to process its options now *before* the tree |
| 352 | initialization occures */ |
| 353 | device_ioctl(tree_find_device(root, "/openprom/trace"), |
| 354 | NULL, 0, |
| 355 | device_ioctl_set_trace); |
| 356 | |
| 357 | #ifdef WITH_OPTION_MPC860C0 |
| 358 | semantic_init(root); |
| 359 | #endif // WITH_OPTION_MPC860C0 |
| 360 | |
| 361 | /* return where the options end */ |
| 362 | return argv + argp; |
| 363 | } |
| 364 | |
| 365 | INLINE_PSIM\ |
| 366 | (void) |
| 367 | psim_command(device *root, |
| 368 | char **argv) |
| 369 | { |
| 370 | int argp = 0; |
| 371 | if (argv[argp] == NULL) { |
| 372 | return; |
| 373 | } |
| 374 | else if (strcmp(argv[argp], "trace") == 0) { |
| 375 | const char *opt = find_arg("Missing <trace> option", &argp, argv); |
| 376 | if (opt[0] == '!') |
| 377 | trace_option(opt + 1, 0); |
| 378 | else |
| 379 | trace_option(opt, 1); |
| 380 | } |
| 381 | else if (strcmp(*argv, "change-media") == 0) { |
| 382 | char *device = find_arg("Missing device name", &argp, argv); |
| 383 | char *media = argv[++argp]; |
| 384 | device_ioctl(tree_find_device(root, device), NULL, 0, |
| 385 | device_ioctl_change_media, media); |
| 386 | } |
| 387 | else { |
| 388 | printf_filtered("Unknown PSIM command %s, try\n", argv[argp]); |
| 389 | printf_filtered(" trace <trace-option>\n"); |
| 390 | printf_filtered(" change-media <device> [ <new-image> ]\n"); |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | |
| 395 | /* create the simulator proper from the device tree and executable */ |
| 396 | |
| 397 | INLINE_PSIM\ |
| 398 | (psim *) |
| 399 | psim_create(const char *file_name, |
| 400 | device *root) |
| 401 | { |
| 402 | int cpu_nr; |
| 403 | const char *env; |
| 404 | psim *system; |
| 405 | os_emul *os_emulation; |
| 406 | int nr_cpus; |
| 407 | |
| 408 | /* given this partially populated device tree, os_emul_create() uses |
| 409 | it and file_name to determine the selected emulation and hence |
| 410 | further populate the tree with any other required nodes. */ |
| 411 | |
| 412 | os_emulation = os_emul_create(file_name, root); |
| 413 | if (os_emulation == NULL) |
| 414 | error("psim: either file %s was not reconized or unreconized or unknown os-emulation type\n", file_name); |
| 415 | |
| 416 | /* fill in the missing real number of CPU's */ |
| 417 | nr_cpus = tree_find_integer_property(root, "/openprom/options/smp"); |
| 418 | if (MAX_NR_PROCESSORS < nr_cpus) |
| 419 | error("target and configured number of cpus conflict\n"); |
| 420 | |
| 421 | /* fill in the missing TARGET BYTE ORDER information */ |
| 422 | current_target_byte_order |
| 423 | = (tree_find_boolean_property(root, "/options/little-endian?") |
| 424 | ? LITTLE_ENDIAN |
| 425 | : BIG_ENDIAN); |
| 426 | if (CURRENT_TARGET_BYTE_ORDER != current_target_byte_order) |
| 427 | error("target and configured byte order conflict\n"); |
| 428 | |
| 429 | /* fill in the missing HOST BYTE ORDER information */ |
| 430 | current_host_byte_order = (current_host_byte_order = 1, |
| 431 | (*(char*)(¤t_host_byte_order) |
| 432 | ? LITTLE_ENDIAN |
| 433 | : BIG_ENDIAN)); |
| 434 | if (CURRENT_HOST_BYTE_ORDER != current_host_byte_order) |
| 435 | error("host and configured byte order conflict\n"); |
| 436 | |
| 437 | /* fill in the missing OEA/VEA information */ |
| 438 | env = tree_find_string_property(root, "/openprom/options/env"); |
| 439 | current_environment = ((strcmp(env, "user") == 0 |
| 440 | || strcmp(env, "uea") == 0) |
| 441 | ? USER_ENVIRONMENT |
| 442 | : (strcmp(env, "virtual") == 0 |
| 443 | || strcmp(env, "vea") == 0) |
| 444 | ? VIRTUAL_ENVIRONMENT |
| 445 | : (strcmp(env, "operating") == 0 |
| 446 | || strcmp(env, "oea") == 0) |
| 447 | ? OPERATING_ENVIRONMENT |
| 448 | : 0); |
| 449 | if (current_environment == 0) |
| 450 | error("unreconized /options env property\n"); |
| 451 | if (CURRENT_ENVIRONMENT != current_environment) |
| 452 | error("target and configured environment conflict\n"); |
| 453 | |
| 454 | /* fill in the missing ALLIGNMENT information */ |
| 455 | current_alignment |
| 456 | = (tree_find_boolean_property(root, "/openprom/options/strict-alignment?") |
| 457 | ? STRICT_ALIGNMENT |
| 458 | : NONSTRICT_ALIGNMENT); |
| 459 | if (CURRENT_ALIGNMENT != current_alignment) |
| 460 | error("target and configured alignment conflict\n"); |
| 461 | |
| 462 | /* fill in the missing FLOATING POINT information */ |
| 463 | current_floating_point |
| 464 | = (tree_find_boolean_property(root, "/openprom/options/floating-point?") |
| 465 | ? HARD_FLOATING_POINT |
| 466 | : SOFT_FLOATING_POINT); |
| 467 | if (CURRENT_FLOATING_POINT != current_floating_point) |
| 468 | error("target and configured floating-point conflict\n"); |
| 469 | |
| 470 | /* fill in the missing STDIO information */ |
| 471 | current_stdio |
| 472 | = (tree_find_boolean_property(root, "/openprom/options/use-stdio?") |
| 473 | ? DO_USE_STDIO |
| 474 | : DONT_USE_STDIO); |
| 475 | if (CURRENT_STDIO != current_stdio) |
| 476 | error("target and configured stdio interface conflict\n"); |
| 477 | |
| 478 | /* sort out the level of detail for issue modeling */ |
| 479 | current_model_issue |
| 480 | = tree_find_integer_property(root, "/openprom/options/model-issue"); |
| 481 | if (CURRENT_MODEL_ISSUE != current_model_issue) |
| 482 | error("target and configured model-issue conflict\n"); |
| 483 | |
| 484 | /* sort out our model architecture - wrong. |
| 485 | |
| 486 | FIXME: this should be obtaining the required information from the |
| 487 | device tree via the "/chosen" property "cpu" which is an instance |
| 488 | (ihandle) for the only executing processor. By converting that |
| 489 | ihandle into the corresponding cpu's phandle and then querying |
| 490 | the "name" property, the cpu type can be determined. Ok? */ |
| 491 | |
| 492 | model_set(tree_find_string_property(root, "/openprom/options/model")); |
| 493 | |
| 494 | /* create things */ |
| 495 | system = ZALLOC(psim); |
| 496 | system->events = event_queue_create(); |
| 497 | system->memory = core_from_device(root); |
| 498 | system->monitor = mon_create(); |
| 499 | system->nr_cpus = nr_cpus; |
| 500 | system->os_emulation = os_emulation; |
| 501 | system->devices = root; |
| 502 | |
| 503 | /* now all the processors attaching to each their per-cpu information */ |
| 504 | for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++) { |
| 505 | system->processors[cpu_nr] = cpu_create(system, |
| 506 | system->memory, |
| 507 | mon_cpu(system->monitor, |
| 508 | cpu_nr), |
| 509 | system->os_emulation, |
| 510 | cpu_nr); |
| 511 | } |
| 512 | |
| 513 | /* dump out the contents of the device tree */ |
| 514 | if (ppc_trace[trace_print_device_tree] || ppc_trace[trace_dump_device_tree]) |
| 515 | tree_print(root); |
| 516 | if (ppc_trace[trace_dump_device_tree]) |
| 517 | error(""); |
| 518 | |
| 519 | return system; |
| 520 | } |
| 521 | |
| 522 | |
| 523 | /* allow the simulation to stop/restart abnormaly */ |
| 524 | |
| 525 | INLINE_PSIM\ |
| 526 | (void) |
| 527 | psim_set_halt_and_restart(psim *system, |
| 528 | void *halt_jmp_buf, |
| 529 | void *restart_jmp_buf) |
| 530 | { |
| 531 | system->path_to_halt = halt_jmp_buf; |
| 532 | system->path_to_restart = restart_jmp_buf; |
| 533 | } |
| 534 | |
| 535 | INLINE_PSIM\ |
| 536 | (void) |
| 537 | psim_clear_halt_and_restart(psim *system) |
| 538 | { |
| 539 | system->path_to_halt = NULL; |
| 540 | system->path_to_restart = NULL; |
| 541 | } |
| 542 | |
| 543 | INLINE_PSIM\ |
| 544 | (void) |
| 545 | psim_restart(psim *system, |
| 546 | int current_cpu) |
| 547 | { |
| 548 | ASSERT(current_cpu >= 0 && current_cpu < system->nr_cpus); |
| 549 | ASSERT(system->path_to_restart != NULL); |
| 550 | system->last_cpu = current_cpu; |
| 551 | longjmp(*(jmp_buf*)(system->path_to_restart), current_cpu + 1); |
| 552 | } |
| 553 | |
| 554 | |
| 555 | static void |
| 556 | cntrl_c_simulation(void *data) |
| 557 | { |
| 558 | psim *system = data; |
| 559 | psim_halt(system, |
| 560 | psim_nr_cpus(system), |
| 561 | was_continuing, |
| 562 | SIGINT); |
| 563 | } |
| 564 | |
| 565 | INLINE_PSIM\ |
| 566 | (void) |
| 567 | psim_stop(psim *system) |
| 568 | { |
| 569 | event_queue_schedule_after_signal(psim_event_queue(system), |
| 570 | 0 /*NOW*/, |
| 571 | cntrl_c_simulation, |
| 572 | system); |
| 573 | } |
| 574 | |
| 575 | INLINE_PSIM\ |
| 576 | (void) |
| 577 | psim_halt(psim *system, |
| 578 | int current_cpu, |
| 579 | stop_reason reason, |
| 580 | int signal) |
| 581 | { |
| 582 | ASSERT(current_cpu >= 0 && current_cpu <= system->nr_cpus); |
| 583 | ASSERT(system->path_to_halt != NULL); |
| 584 | system->last_cpu = current_cpu; |
| 585 | system->halt_status.reason = reason; |
| 586 | system->halt_status.signal = signal; |
| 587 | if (current_cpu == system->nr_cpus) { |
| 588 | system->halt_status.cpu_nr = 0; |
| 589 | system->halt_status.program_counter = |
| 590 | cpu_get_program_counter(system->processors[0]); |
| 591 | } |
| 592 | else { |
| 593 | system->halt_status.cpu_nr = current_cpu; |
| 594 | system->halt_status.program_counter = |
| 595 | cpu_get_program_counter(system->processors[current_cpu]); |
| 596 | } |
| 597 | longjmp(*(jmp_buf*)(system->path_to_halt), current_cpu + 1); |
| 598 | } |
| 599 | |
| 600 | |
| 601 | INLINE_PSIM\ |
| 602 | (int) |
| 603 | psim_last_cpu(psim *system) |
| 604 | { |
| 605 | return system->last_cpu; |
| 606 | } |
| 607 | |
| 608 | INLINE_PSIM\ |
| 609 | (int) |
| 610 | psim_nr_cpus(psim *system) |
| 611 | { |
| 612 | return system->nr_cpus; |
| 613 | } |
| 614 | |
| 615 | INLINE_PSIM\ |
| 616 | (psim_status) |
| 617 | psim_get_status(psim *system) |
| 618 | { |
| 619 | return system->halt_status; |
| 620 | } |
| 621 | |
| 622 | |
| 623 | INLINE_PSIM\ |
| 624 | (cpu *) |
| 625 | psim_cpu(psim *system, |
| 626 | int cpu_nr) |
| 627 | { |
| 628 | if (cpu_nr < 0 || cpu_nr >= system->nr_cpus) |
| 629 | return NULL; |
| 630 | else |
| 631 | return system->processors[cpu_nr]; |
| 632 | } |
| 633 | |
| 634 | |
| 635 | INLINE_PSIM\ |
| 636 | (device *) |
| 637 | psim_device(psim *system, |
| 638 | const char *path) |
| 639 | { |
| 640 | return tree_find_device(system->devices, path); |
| 641 | } |
| 642 | |
| 643 | INLINE_PSIM\ |
| 644 | (event_queue *) |
| 645 | psim_event_queue(psim *system) |
| 646 | { |
| 647 | return system->events; |
| 648 | } |
| 649 | |
| 650 | |
| 651 | |
| 652 | STATIC_INLINE_PSIM\ |
| 653 | (void) |
| 654 | psim_max_iterations_exceeded(void *data) |
| 655 | { |
| 656 | psim *system = data; |
| 657 | psim_halt(system, |
| 658 | system->nr_cpus, /* halted during an event */ |
| 659 | was_signalled, |
| 660 | -1); |
| 661 | } |
| 662 | |
| 663 | |
| 664 | INLINE_PSIM\ |
| 665 | (void) |
| 666 | psim_init(psim *system) |
| 667 | { |
| 668 | int cpu_nr; |
| 669 | |
| 670 | /* scrub the monitor */ |
| 671 | mon_init(system->monitor, system->nr_cpus); |
| 672 | |
| 673 | /* trash any pending events */ |
| 674 | event_queue_init(system->events); |
| 675 | |
| 676 | /* if needed, schedule a halt event. FIXME - In the future this |
| 677 | will be replaced by a more generic change to psim_command(). A |
| 678 | new command `schedule NNN halt' being added. */ |
| 679 | if (tree_find_property(system->devices, "/openprom/options/max-iterations")) { |
| 680 | event_queue_schedule(system->events, |
| 681 | tree_find_integer_property(system->devices, |
| 682 | "/openprom/options/max-iterations") - 2, |
| 683 | psim_max_iterations_exceeded, |
| 684 | system); |
| 685 | } |
| 686 | |
| 687 | /* scrub all the cpus */ |
| 688 | for (cpu_nr = 0; cpu_nr < system->nr_cpus; cpu_nr++) |
| 689 | cpu_init(system->processors[cpu_nr]); |
| 690 | |
| 691 | /* init all the devices (which updates the cpus) */ |
| 692 | tree_init(system->devices, system); |
| 693 | |
| 694 | /* and the emulation (which needs an initialized device tree) */ |
| 695 | os_emul_init(system->os_emulation, system->nr_cpus); |
| 696 | |
| 697 | /* now sync each cpu against the initialized state of its registers */ |
| 698 | for (cpu_nr = 0; cpu_nr < system->nr_cpus; cpu_nr++) { |
| 699 | cpu *processor = system->processors[cpu_nr]; |
| 700 | cpu_synchronize_context(processor, cpu_get_program_counter(processor)); |
| 701 | cpu_page_tlb_invalidate_all(processor); |
| 702 | } |
| 703 | |
| 704 | /* force loop to start with first cpu */ |
| 705 | system->last_cpu = -1; |
| 706 | } |
| 707 | |
| 708 | INLINE_PSIM\ |
| 709 | (void) |
| 710 | psim_stack(psim *system, |
| 711 | char **argv, |
| 712 | char **envp) |
| 713 | { |
| 714 | /* pass the stack device the argv/envp and let it work out what to |
| 715 | do with it */ |
| 716 | device *stack_device = tree_find_device(system->devices, |
| 717 | "/openprom/init/stack"); |
| 718 | if (stack_device != (device*)0) { |
| 719 | unsigned_word stack_pointer; |
| 720 | psim_read_register(system, 0, &stack_pointer, "sp", cooked_transfer); |
| 721 | device_ioctl(stack_device, |
| 722 | NULL, /*cpu*/ |
| 723 | 0, /*cia*/ |
| 724 | device_ioctl_create_stack, |
| 725 | stack_pointer, |
| 726 | argv, |
| 727 | envp); |
| 728 | } |
| 729 | } |
| 730 | |
| 731 | |
| 732 | |
| 733 | /* SIMULATE INSTRUCTIONS, various different ways of achieving the same |
| 734 | thing */ |
| 735 | |
| 736 | INLINE_PSIM\ |
| 737 | (void) |
| 738 | psim_step(psim *system) |
| 739 | { |
| 740 | volatile int keep_running = 0; |
| 741 | idecode_run_until_stop(system, &keep_running, |
| 742 | system->events, system->processors, system->nr_cpus); |
| 743 | } |
| 744 | |
| 745 | INLINE_PSIM\ |
| 746 | (void) |
| 747 | psim_run(psim *system) |
| 748 | { |
| 749 | idecode_run(system, |
| 750 | system->events, system->processors, system->nr_cpus); |
| 751 | } |
| 752 | |
| 753 | |
| 754 | /* storage manipulation functions */ |
| 755 | |
| 756 | INLINE_PSIM\ |
| 757 | (void) |
| 758 | psim_read_register(psim *system, |
| 759 | int which_cpu, |
| 760 | void *buf, |
| 761 | const char reg[], |
| 762 | transfer_mode mode) |
| 763 | { |
| 764 | register_descriptions description; |
| 765 | char cooked_buf[sizeof(unsigned_8)]; |
| 766 | cpu *processor; |
| 767 | |
| 768 | /* find our processor */ |
| 769 | if (which_cpu == MAX_NR_PROCESSORS) { |
| 770 | if (system->last_cpu == system->nr_cpus |
| 771 | || system->last_cpu == -1) |
| 772 | which_cpu = 0; |
| 773 | else |
| 774 | which_cpu = system->last_cpu; |
| 775 | } |
| 776 | ASSERT(which_cpu >= 0 && which_cpu < system->nr_cpus); |
| 777 | |
| 778 | processor = system->processors[which_cpu]; |
| 779 | |
| 780 | /* find the register description */ |
| 781 | description = register_description(reg); |
| 782 | if (description.type == reg_invalid) |
| 783 | error("psim_read_register() invalid register name `%s'\n", reg); |
| 784 | |
| 785 | /* get the cooked value */ |
| 786 | switch (description.type) { |
| 787 | |
| 788 | case reg_gpr: |
| 789 | *(gpreg*)cooked_buf = cpu_registers(processor)->gpr[description.index]; |
| 790 | break; |
| 791 | |
| 792 | case reg_spr: |
| 793 | *(spreg*)cooked_buf = cpu_registers(processor)->spr[description.index]; |
| 794 | break; |
| 795 | |
| 796 | case reg_sr: |
| 797 | *(sreg*)cooked_buf = cpu_registers(processor)->sr[description.index]; |
| 798 | break; |
| 799 | |
| 800 | case reg_fpr: |
| 801 | *(fpreg*)cooked_buf = cpu_registers(processor)->fpr[description.index]; |
| 802 | break; |
| 803 | |
| 804 | case reg_pc: |
| 805 | *(unsigned_word*)cooked_buf = cpu_get_program_counter(processor); |
| 806 | break; |
| 807 | |
| 808 | case reg_cr: |
| 809 | *(creg*)cooked_buf = cpu_registers(processor)->cr; |
| 810 | break; |
| 811 | |
| 812 | case reg_msr: |
| 813 | *(msreg*)cooked_buf = cpu_registers(processor)->msr; |
| 814 | break; |
| 815 | |
| 816 | case reg_fpscr: |
| 817 | *(fpscreg*)cooked_buf = cpu_registers(processor)->fpscr; |
| 818 | break; |
| 819 | |
| 820 | case reg_insns: |
| 821 | *(unsigned_word*)cooked_buf = mon_get_number_of_insns(system->monitor, |
| 822 | which_cpu); |
| 823 | break; |
| 824 | |
| 825 | case reg_stalls: |
| 826 | if (cpu_model(processor) == NULL) |
| 827 | error("$stalls only valid if processor unit model enabled (-I)\n"); |
| 828 | *(unsigned_word*)cooked_buf = model_get_number_of_stalls(cpu_model(processor)); |
| 829 | break; |
| 830 | |
| 831 | case reg_cycles: |
| 832 | if (cpu_model(processor) == NULL) |
| 833 | error("$cycles only valid if processor unit model enabled (-I)\n"); |
| 834 | *(unsigned_word*)cooked_buf = model_get_number_of_cycles(cpu_model(processor)); |
| 835 | break; |
| 836 | |
| 837 | default: |
| 838 | printf_filtered("psim_read_register(processor=0x%lx,buf=0x%lx,reg=%s) %s\n", |
| 839 | (unsigned long)processor, (unsigned long)buf, reg, |
| 840 | "read of this register unimplemented"); |
| 841 | break; |
| 842 | |
| 843 | } |
| 844 | |
| 845 | /* the PSIM internal values are in host order. To fetch raw data, |
| 846 | they need to be converted into target order and then returned */ |
| 847 | if (mode == raw_transfer) { |
| 848 | /* FIXME - assumes that all registers are simple integers */ |
| 849 | switch (description.size) { |
| 850 | case 1: |
| 851 | *(unsigned_1*)buf = H2T_1(*(unsigned_1*)cooked_buf); |
| 852 | break; |
| 853 | case 2: |
| 854 | *(unsigned_2*)buf = H2T_2(*(unsigned_2*)cooked_buf); |
| 855 | break; |
| 856 | case 4: |
| 857 | *(unsigned_4*)buf = H2T_4(*(unsigned_4*)cooked_buf); |
| 858 | break; |
| 859 | case 8: |
| 860 | *(unsigned_8*)buf = H2T_8(*(unsigned_8*)cooked_buf); |
| 861 | break; |
| 862 | } |
| 863 | } |
| 864 | else { |
| 865 | memcpy(buf/*dest*/, cooked_buf/*src*/, description.size); |
| 866 | } |
| 867 | |
| 868 | } |
| 869 | |
| 870 | |
| 871 | |
| 872 | INLINE_PSIM\ |
| 873 | (void) |
| 874 | psim_write_register(psim *system, |
| 875 | int which_cpu, |
| 876 | const void *buf, |
| 877 | const char reg[], |
| 878 | transfer_mode mode) |
| 879 | { |
| 880 | cpu *processor; |
| 881 | register_descriptions description; |
| 882 | char cooked_buf[sizeof(unsigned_8)]; |
| 883 | |
| 884 | /* find our processor */ |
| 885 | if (which_cpu == MAX_NR_PROCESSORS) { |
| 886 | if (system->last_cpu == system->nr_cpus |
| 887 | || system->last_cpu == -1) |
| 888 | which_cpu = 0; |
| 889 | else |
| 890 | which_cpu = system->last_cpu; |
| 891 | } |
| 892 | if (which_cpu == -1) { |
| 893 | int i; |
| 894 | for (i = 0; i < system->nr_cpus; i++) |
| 895 | psim_write_register(system, i, buf, reg, mode); |
| 896 | return; |
| 897 | } |
| 898 | ASSERT(which_cpu >= 0 && which_cpu < system->nr_cpus); |
| 899 | |
| 900 | processor = system->processors[which_cpu]; |
| 901 | |
| 902 | /* find the description of the register */ |
| 903 | description = register_description(reg); |
| 904 | if (description.type == reg_invalid) |
| 905 | error("psim_write_register() invalid register name %s\n", reg); |
| 906 | |
| 907 | /* If the data is comming in raw (target order), need to cook it |
| 908 | into host order before putting it into PSIM's internal structures */ |
| 909 | if (mode == raw_transfer) { |
| 910 | switch (description.size) { |
| 911 | case 1: |
| 912 | *(unsigned_1*)cooked_buf = T2H_1(*(unsigned_1*)buf); |
| 913 | break; |
| 914 | case 2: |
| 915 | *(unsigned_2*)cooked_buf = T2H_2(*(unsigned_2*)buf); |
| 916 | break; |
| 917 | case 4: |
| 918 | *(unsigned_4*)cooked_buf = T2H_4(*(unsigned_4*)buf); |
| 919 | break; |
| 920 | case 8: |
| 921 | *(unsigned_8*)cooked_buf = T2H_8(*(unsigned_8*)buf); |
| 922 | break; |
| 923 | } |
| 924 | } |
| 925 | else { |
| 926 | memcpy(cooked_buf/*dest*/, buf/*src*/, description.size); |
| 927 | } |
| 928 | |
| 929 | /* put the cooked value into the register */ |
| 930 | switch (description.type) { |
| 931 | |
| 932 | case reg_gpr: |
| 933 | cpu_registers(processor)->gpr[description.index] = *(gpreg*)cooked_buf; |
| 934 | break; |
| 935 | |
| 936 | case reg_fpr: |
| 937 | cpu_registers(processor)->fpr[description.index] = *(fpreg*)cooked_buf; |
| 938 | break; |
| 939 | |
| 940 | case reg_pc: |
| 941 | cpu_set_program_counter(processor, *(unsigned_word*)cooked_buf); |
| 942 | break; |
| 943 | |
| 944 | case reg_spr: |
| 945 | cpu_registers(processor)->spr[description.index] = *(spreg*)cooked_buf; |
| 946 | break; |
| 947 | |
| 948 | case reg_sr: |
| 949 | cpu_registers(processor)->sr[description.index] = *(sreg*)cooked_buf; |
| 950 | break; |
| 951 | |
| 952 | case reg_cr: |
| 953 | cpu_registers(processor)->cr = *(creg*)cooked_buf; |
| 954 | break; |
| 955 | |
| 956 | case reg_msr: |
| 957 | cpu_registers(processor)->msr = *(msreg*)cooked_buf; |
| 958 | break; |
| 959 | |
| 960 | case reg_fpscr: |
| 961 | cpu_registers(processor)->fpscr = *(fpscreg*)cooked_buf; |
| 962 | break; |
| 963 | |
| 964 | default: |
| 965 | printf_filtered("psim_write_register(processor=0x%lx,cooked_buf=0x%lx,reg=%s) %s\n", |
| 966 | (unsigned long)processor, (unsigned long)cooked_buf, reg, |
| 967 | "read of this register unimplemented"); |
| 968 | break; |
| 969 | |
| 970 | } |
| 971 | |
| 972 | } |
| 973 | |
| 974 | |
| 975 | |
| 976 | INLINE_PSIM\ |
| 977 | (unsigned) |
| 978 | psim_read_memory(psim *system, |
| 979 | int which_cpu, |
| 980 | void *buffer, |
| 981 | unsigned_word vaddr, |
| 982 | unsigned nr_bytes) |
| 983 | { |
| 984 | cpu *processor; |
| 985 | if (which_cpu == MAX_NR_PROCESSORS) { |
| 986 | if (system->last_cpu == system->nr_cpus |
| 987 | || system->last_cpu == -1) |
| 988 | which_cpu = 0; |
| 989 | else |
| 990 | which_cpu = system->last_cpu; |
| 991 | } |
| 992 | processor = system->processors[which_cpu]; |
| 993 | return vm_data_map_read_buffer(cpu_data_map(processor), |
| 994 | buffer, vaddr, nr_bytes, |
| 995 | NULL, -1); |
| 996 | } |
| 997 | |
| 998 | |
| 999 | INLINE_PSIM\ |
| 1000 | (unsigned) |
| 1001 | psim_write_memory(psim *system, |
| 1002 | int which_cpu, |
| 1003 | const void *buffer, |
| 1004 | unsigned_word vaddr, |
| 1005 | unsigned nr_bytes, |
| 1006 | int violate_read_only_section) |
| 1007 | { |
| 1008 | cpu *processor; |
| 1009 | if (which_cpu == MAX_NR_PROCESSORS) { |
| 1010 | if (system->last_cpu == system->nr_cpus |
| 1011 | || system->last_cpu == -1) |
| 1012 | which_cpu = 0; |
| 1013 | else |
| 1014 | which_cpu = system->last_cpu; |
| 1015 | } |
| 1016 | ASSERT(which_cpu >= 0 && which_cpu < system->nr_cpus); |
| 1017 | processor = system->processors[which_cpu]; |
| 1018 | return vm_data_map_write_buffer(cpu_data_map(processor), |
| 1019 | buffer, vaddr, nr_bytes, 1/*violate-read-only*/, |
| 1020 | NULL, -1); |
| 1021 | } |
| 1022 | |
| 1023 | |
| 1024 | INLINE_PSIM\ |
| 1025 | (void) |
| 1026 | psim_print_info(psim *system, |
| 1027 | int verbose) |
| 1028 | { |
| 1029 | mon_print_info(system, system->monitor, verbose); |
| 1030 | } |
| 1031 | |
| 1032 | |
| 1033 | /* Merge a device tree and a device file. */ |
| 1034 | |
| 1035 | INLINE_PSIM\ |
| 1036 | (void) |
| 1037 | psim_merge_device_file(device *root, |
| 1038 | const char *file_name) |
| 1039 | { |
| 1040 | FILE *description; |
| 1041 | int line_nr; |
| 1042 | char device_path[1000]; |
| 1043 | device *current; |
| 1044 | |
| 1045 | /* try opening the file */ |
| 1046 | description = fopen(file_name, "r"); |
| 1047 | if (description == NULL) { |
| 1048 | perror(file_name); |
| 1049 | error("Invalid file %s specified", file_name); |
| 1050 | } |
| 1051 | |
| 1052 | line_nr = 0; |
| 1053 | current = root; |
| 1054 | while (fgets(device_path, sizeof(device_path), description)) { |
| 1055 | char *device; |
| 1056 | /* check that the full line was read */ |
| 1057 | if (strchr(device_path, '\n') == NULL) { |
| 1058 | fclose(description); |
| 1059 | error("%s:%d: line to long - %s", |
| 1060 | file_name, line_nr, device_path); |
| 1061 | } |
| 1062 | else |
| 1063 | *strchr(device_path, '\n') = '\0'; |
| 1064 | line_nr++; |
| 1065 | /* skip comments ("#" or ";") and blank lines lines */ |
| 1066 | for (device = device_path; |
| 1067 | *device != '\0' && isspace(*device); |
| 1068 | device++); |
| 1069 | if (device[0] == '#' |
| 1070 | || device[0] == ';' |
| 1071 | || device[0] == '\0') |
| 1072 | continue; |
| 1073 | /* merge any appended lines */ |
| 1074 | while (device_path[strlen(device_path) - 1] == '\\') { |
| 1075 | int curlen = strlen(device_path) - 1; |
| 1076 | /* zap \ */ |
| 1077 | device_path[curlen] = '\0'; |
| 1078 | /* append the next line */ |
| 1079 | if (!fgets(device_path + curlen, sizeof(device_path) - curlen, description)) { |
| 1080 | fclose(description); |
| 1081 | error("%s:%s: unexpected eof in line continuation - %s", |
| 1082 | file_name, line_nr, device_path); |
| 1083 | } |
| 1084 | if (strchr(device_path, '\n') == NULL) { |
| 1085 | fclose(description); |
| 1086 | error("%s:%d: line to long - %s", |
| 1087 | file_name, line_nr, device_path); |
| 1088 | } |
| 1089 | else |
| 1090 | *strchr(device_path, '\n') = '\0'; |
| 1091 | line_nr++; |
| 1092 | } |
| 1093 | /* parse this line */ |
| 1094 | current = tree_parse(current, "%s", device); |
| 1095 | } |
| 1096 | fclose(description); |
| 1097 | } |
| 1098 | |
| 1099 | |
| 1100 | #endif /* _PSIM_C_ */ |