Stefan Reinauer | 6540ae5 | 2007-07-12 16:35:42 +0000 | [diff] [blame^] | 1 | /*****************************************************************************\ |
| 2 | * lxbios.c |
| 3 | * $Id: lxbios.c,v 1.3 2006/01/24 00:25:40 dsp_llnl Exp $ |
| 4 | ***************************************************************************** |
| 5 | * Copyright (C) 2002-2005 The Regents of the University of California. |
| 6 | * Produced at the Lawrence Livermore National Laboratory. |
| 7 | * Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>. |
| 8 | * UCRL-CODE-2003-012 |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * This file is part of lxbios, a utility for reading/writing LinuxBIOS |
| 12 | * parameters and displaying information from the LinuxBIOS table. |
| 13 | * For details, see <http://www.llnl.gov/linux/lxbios/>. |
| 14 | * |
| 15 | * Please also read the file DISCLAIMER which is included in this software |
| 16 | * distribution. |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or modify it |
| 19 | * under the terms of the GNU General Public License (as published by the |
| 20 | * Free Software Foundation) version 2, dated June 1991. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, but |
| 23 | * WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and |
| 25 | * conditions of the GNU General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License along |
| 28 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 29 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 30 | \*****************************************************************************/ |
| 31 | |
| 32 | #include "common.h" |
| 33 | #include "opts.h" |
| 34 | #include "lbtable.h" |
| 35 | #include "layout.h" |
| 36 | #include "layout_file.h" |
| 37 | #include "input_file.h" |
| 38 | #include "cmos_ops.h" |
| 39 | #include "cmos_lowlevel.h" |
| 40 | #include "reg_expr.h" |
| 41 | #include "hexdump.h" |
| 42 | |
| 43 | typedef void (*op_fn_t) (void); |
| 44 | |
| 45 | static void op_show_version (void); |
| 46 | static void op_show_usage (void); |
| 47 | static void op_lbtable_show_info (void); |
| 48 | static void op_lbtable_dump (void); |
| 49 | static void op_show_param_values (void); |
| 50 | static void op_cmos_show_one_param (void); |
| 51 | static void op_cmos_show_all_params (void); |
| 52 | static void op_cmos_set_one_param (void); |
| 53 | static void op_cmos_set_params_stdin (void); |
| 54 | static void op_cmos_set_params_file (void); |
| 55 | static void op_cmos_checksum (void); |
| 56 | static void op_show_layout (void); |
| 57 | static void op_write_cmos_dump (void); |
| 58 | static void op_read_cmos_dump (void); |
| 59 | static void op_show_cmos_hex_dump (void); |
| 60 | static void op_show_cmos_dumpfile (void); |
| 61 | static int list_one_param (const char name[], int show_name); |
| 62 | static int list_all_params (void); |
| 63 | static void list_param_enums (const char name[]); |
| 64 | static void set_one_param (const char name[], const char value[]); |
| 65 | static void set_params (FILE *f); |
| 66 | static void parse_assignment (char arg[], const char **name, |
| 67 | const char **value); |
| 68 | static int list_cmos_entry (const cmos_entry_t *e, int show_name); |
| 69 | static uint16_t convert_checksum_value (const char value[]); |
| 70 | |
| 71 | static const op_fn_t op_fns[] = |
| 72 | { op_show_version, |
| 73 | op_show_usage, |
| 74 | op_lbtable_show_info, |
| 75 | op_lbtable_dump, |
| 76 | op_show_param_values, |
| 77 | op_cmos_show_one_param, |
| 78 | op_cmos_show_all_params, |
| 79 | op_cmos_set_one_param, |
| 80 | op_cmos_set_params_stdin, |
| 81 | op_cmos_set_params_file, |
| 82 | op_cmos_checksum, |
| 83 | op_show_layout, |
| 84 | op_write_cmos_dump, |
| 85 | op_read_cmos_dump, |
| 86 | op_show_cmos_hex_dump, |
| 87 | op_show_cmos_dumpfile |
| 88 | }; |
| 89 | |
| 90 | static const hexdump_format_t cmos_dump_format = |
| 91 | { 16, 2, "", " | ", " ", " | ", '.', NULL }; |
| 92 | |
| 93 | /**************************************************************************** |
| 94 | * main |
| 95 | ****************************************************************************/ |
| 96 | int main (int argc, char *argv[]) |
| 97 | { cmos_layout_get_fn_t fn; |
| 98 | |
| 99 | parse_lxbios_args(argc, argv); |
| 100 | |
| 101 | if (lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found) |
| 102 | { set_layout_filename( |
| 103 | lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].param); |
| 104 | fn = get_layout_from_file; |
| 105 | } |
| 106 | else |
| 107 | fn = get_layout_from_cmos_table; |
| 108 | |
| 109 | register_cmos_layout_get_fn(fn); |
| 110 | op_fns[lxbios_op.op](); |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | /**************************************************************************** |
| 115 | * op_show_version |
| 116 | * |
| 117 | * -v |
| 118 | * |
| 119 | * Show version information for this program. |
| 120 | ****************************************************************************/ |
| 121 | static void op_show_version (void) |
| 122 | { printf("This is %s version %s.\n", prog_name, prog_version); } |
| 123 | |
| 124 | /**************************************************************************** |
| 125 | * op_show_usage |
| 126 | * |
| 127 | * -h |
| 128 | * |
| 129 | * Show a usage message for this program. |
| 130 | ****************************************************************************/ |
| 131 | static void op_show_usage (void) |
| 132 | { usage(stdout); } |
| 133 | |
| 134 | /**************************************************************************** |
| 135 | * op_lbtable_show_info |
| 136 | * |
| 137 | * -l [ARG] |
| 138 | * |
| 139 | * If ARG is present, show LinuxBIOS table information specified by ARG. |
| 140 | * Else show all possible values for ARG. |
| 141 | ****************************************************************************/ |
| 142 | static void op_lbtable_show_info (void) |
| 143 | { if (lxbios_op.param == NULL) |
| 144 | list_lbtable_choices(); |
| 145 | else |
| 146 | { get_lbtable(); |
| 147 | list_lbtable_item(lxbios_op.param); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | /**************************************************************************** |
| 152 | * op_lbtable_dump |
| 153 | * |
| 154 | * -d |
| 155 | * |
| 156 | * Do low-level dump of LinuxBIOS table. |
| 157 | ****************************************************************************/ |
| 158 | static void op_lbtable_dump (void) |
| 159 | { get_lbtable(); |
| 160 | dump_lbtable(); |
| 161 | } |
| 162 | |
| 163 | /**************************************************************************** |
| 164 | * op_show_param_values |
| 165 | * |
| 166 | * -e NAME option |
| 167 | * |
| 168 | * Show all possible values for parameter NAME. |
| 169 | ****************************************************************************/ |
| 170 | static void op_show_param_values (void) |
| 171 | { get_cmos_layout(); |
| 172 | list_param_enums(lxbios_op.param); |
| 173 | } |
| 174 | |
| 175 | /**************************************************************************** |
| 176 | * op_cmos_show_one_param |
| 177 | * |
| 178 | * [-n] -r NAME |
| 179 | * |
| 180 | * Show parameter NAME. If -n is specified, show value only. Else show name |
| 181 | * and value. |
| 182 | ****************************************************************************/ |
| 183 | static void op_cmos_show_one_param (void) |
| 184 | { int result; |
| 185 | |
| 186 | get_cmos_layout(); |
| 187 | result = list_one_param(lxbios_op.param, |
| 188 | !lxbios_op_modifiers[LXBIOS_MOD_SHOW_VALUE_ONLY].found); |
| 189 | cmos_checksum_verify(); |
| 190 | |
| 191 | if (result) |
| 192 | exit(1); |
| 193 | } |
| 194 | |
| 195 | /**************************************************************************** |
| 196 | * op_cmos_show_all_params |
| 197 | * |
| 198 | * -a |
| 199 | * |
| 200 | * Show names and values for all parameters. |
| 201 | ****************************************************************************/ |
| 202 | static void op_cmos_show_all_params (void) |
| 203 | { int result; |
| 204 | |
| 205 | get_cmos_layout(); |
| 206 | result = list_all_params(); |
| 207 | cmos_checksum_verify(); |
| 208 | |
| 209 | if (result) |
| 210 | exit(1); |
| 211 | } |
| 212 | |
| 213 | /**************************************************************************** |
| 214 | * op_cmos_set_one_param |
| 215 | * |
| 216 | * -w NAME=VALUE |
| 217 | * |
| 218 | * Set parameter NAME to VALUE. |
| 219 | ****************************************************************************/ |
| 220 | static void op_cmos_set_one_param (void) |
| 221 | { const char *name, *value; |
| 222 | |
| 223 | get_cmos_layout(); |
| 224 | |
| 225 | /* Separate 'NAME=VALUE' syntax into two strings representing NAME and |
| 226 | * VALUE. |
| 227 | */ |
| 228 | parse_assignment(lxbios_op.param, &name, &value); |
| 229 | |
| 230 | set_one_param(name, value); |
| 231 | } |
| 232 | |
| 233 | /**************************************************************************** |
| 234 | * op_cmos_set_params_stdin |
| 235 | * |
| 236 | * -i |
| 237 | * |
| 238 | * Set parameters according to standard input. |
| 239 | ****************************************************************************/ |
| 240 | static void op_cmos_set_params_stdin (void) |
| 241 | { get_cmos_layout(); |
| 242 | set_params(stdin); |
| 243 | } |
| 244 | |
| 245 | /**************************************************************************** |
| 246 | * op_cmos_set_params_file |
| 247 | * |
| 248 | * -p INPUT_FILE |
| 249 | * |
| 250 | * Set parameters according to INPUT_FILE. |
| 251 | ****************************************************************************/ |
| 252 | static void op_cmos_set_params_file (void) |
| 253 | { FILE *f; |
| 254 | |
| 255 | if ((f = fopen(lxbios_op.param, "r")) == NULL) |
| 256 | { fprintf(stderr, "%s: Can not open file %s for reading: %s\n", |
| 257 | prog_name, lxbios_op.param, strerror(errno)); |
| 258 | exit(1); |
| 259 | } |
| 260 | |
| 261 | get_cmos_layout(); |
| 262 | set_params(f); |
| 263 | fclose(f); |
| 264 | } |
| 265 | |
| 266 | /**************************************************************************** |
| 267 | * op_cmos_checksum |
| 268 | * |
| 269 | * -c [VALUE] |
| 270 | * |
| 271 | * If VALUE is present, set LinuxBIOS CMOS checksum to VALUE. Else show |
| 272 | * checksum value. |
| 273 | ****************************************************************************/ |
| 274 | static void op_cmos_checksum (void) |
| 275 | { uint16_t checksum; |
| 276 | |
| 277 | get_cmos_layout(); |
| 278 | |
| 279 | if (lxbios_op.param == NULL) |
| 280 | { set_iopl(3); |
| 281 | checksum = cmos_checksum_read(); |
| 282 | set_iopl(0); |
| 283 | printf("0x%x\n", checksum); |
| 284 | } |
| 285 | else |
| 286 | { checksum = convert_checksum_value(lxbios_op.param); |
| 287 | set_iopl(3); |
| 288 | cmos_checksum_write(checksum); |
| 289 | set_iopl(0); |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | /**************************************************************************** |
| 294 | * op_show_layout |
| 295 | * |
| 296 | * -Y |
| 297 | * |
| 298 | * Write CMOS layout information to standard output. |
| 299 | ****************************************************************************/ |
| 300 | static void op_show_layout (void) |
| 301 | { get_cmos_layout(); |
| 302 | write_cmos_layout(stdout); |
| 303 | } |
| 304 | |
| 305 | /**************************************************************************** |
| 306 | * op_write_cmos_dump |
| 307 | * |
| 308 | * -b OUTPUT_FILE |
| 309 | * |
| 310 | * Write the contents of CMOS memory to a binary file. |
| 311 | ****************************************************************************/ |
| 312 | static void op_write_cmos_dump (void) |
| 313 | { unsigned char data[CMOS_SIZE]; |
| 314 | FILE *f; |
| 315 | |
| 316 | if ((f = fopen(lxbios_op.param, "w")) == NULL) |
| 317 | { fprintf(stderr, "%s: Can not open file %s for writing: %s\n", |
| 318 | prog_name, lxbios_op.param, strerror(errno)); |
| 319 | exit(1); |
| 320 | } |
| 321 | |
| 322 | set_iopl(3); |
| 323 | cmos_read_all(data); |
| 324 | set_iopl(0); |
| 325 | |
| 326 | if (fwrite(data, 1, CMOS_SIZE, f) != CMOS_SIZE) |
| 327 | { fprintf(stderr, "%s: Error writing CMOS data to file %s: %s\n", |
| 328 | prog_name, lxbios_op.param, strerror(errno)); |
| 329 | exit(1); |
| 330 | } |
| 331 | |
| 332 | fclose(f); |
| 333 | } |
| 334 | |
| 335 | /**************************************************************************** |
| 336 | * op_read_cmos_dump |
| 337 | * |
| 338 | * -B INPUT_FILE |
| 339 | * |
| 340 | * Read binary data from a file and write the data to CMOS memory. |
| 341 | ****************************************************************************/ |
| 342 | static void op_read_cmos_dump (void) |
| 343 | { unsigned char data[CMOS_SIZE]; |
| 344 | size_t nr_bytes; |
| 345 | FILE *f; |
| 346 | |
| 347 | if ((f = fopen(lxbios_op.param, "r")) == NULL) |
| 348 | { fprintf(stderr, "%s: Can not open file %s for reading: %s\n", |
| 349 | prog_name, lxbios_op.param, strerror(errno)); |
| 350 | exit(1); |
| 351 | } |
| 352 | |
| 353 | if ((nr_bytes = fread(data, 1, CMOS_SIZE, f)) != CMOS_SIZE) |
| 354 | { fprintf(stderr, "%s: Error: Only able to read %d bytes of CMOS data " |
| 355 | "from file %s. CMOS data is unchanged.\n", prog_name, |
| 356 | (int) nr_bytes, lxbios_op.param); |
| 357 | exit(1); |
| 358 | } |
| 359 | |
| 360 | fclose(f); |
| 361 | set_iopl(3); |
| 362 | cmos_write_all(data); |
| 363 | set_iopl(0); |
| 364 | } |
| 365 | |
| 366 | /**************************************************************************** |
| 367 | * op_show_cmos_hex_dump |
| 368 | * |
| 369 | * -x |
| 370 | * |
| 371 | * Write a hex dump of CMOS memory to standard output. |
| 372 | ****************************************************************************/ |
| 373 | static void op_show_cmos_hex_dump (void) |
| 374 | { unsigned char data[CMOS_SIZE]; |
| 375 | |
| 376 | set_iopl(3); |
| 377 | cmos_read_all(data); |
| 378 | set_iopl(0); |
| 379 | hexdump(data, CMOS_SIZE, 0, stdout, &cmos_dump_format); |
| 380 | } |
| 381 | |
| 382 | /**************************************************************************** |
| 383 | * op_show_cmos_dumpfile |
| 384 | * |
| 385 | * -X DUMP_FILE |
| 386 | * |
| 387 | * Read binary data from a file (presumably a CMOS dump file) and display a |
| 388 | * hex dump of the CMOS data from the file. |
| 389 | ****************************************************************************/ |
| 390 | static void op_show_cmos_dumpfile (void) |
| 391 | { unsigned char data[CMOS_SIZE]; |
| 392 | size_t nr_bytes; |
| 393 | FILE *f; |
| 394 | |
| 395 | if ((f = fopen(lxbios_op.param, "r")) == NULL) |
| 396 | { fprintf(stderr, "%s: Can not open file %s for reading: %s\n", |
| 397 | prog_name, lxbios_op.param, strerror(errno)); |
| 398 | exit(1); |
| 399 | } |
| 400 | |
| 401 | nr_bytes = fread(data, 1, CMOS_SIZE, f); |
| 402 | fclose(f); |
| 403 | hexdump(data, nr_bytes, 0, stdout, &cmos_dump_format); |
| 404 | } |
| 405 | |
| 406 | /**************************************************************************** |
| 407 | * list_one_param |
| 408 | * |
| 409 | * Attempt to list one CMOS parameter given by 'name'. 'show_name' is a |
| 410 | * boolean value indicating whether the parameter name should be displayed |
| 411 | * along with its value. Return 1 if error was encountered. Else return OK. |
| 412 | ****************************************************************************/ |
| 413 | static int list_one_param (const char name[], int show_name) |
| 414 | { const cmos_entry_t *e; |
| 415 | |
| 416 | if (is_checksum_name(name) || ((e = find_cmos_entry(name)) == NULL)) |
| 417 | { fprintf(stderr, "%s: CMOS parameter %s not found.\n", prog_name, name); |
| 418 | exit(1); |
| 419 | } |
| 420 | |
| 421 | if (e->config == CMOS_ENTRY_RESERVED) |
| 422 | { fprintf(stderr, "%s: Parameter %s is reserved.\n", prog_name, name); |
| 423 | exit(1); |
| 424 | } |
| 425 | |
| 426 | return (list_cmos_entry(e, show_name) != 0); |
| 427 | } |
| 428 | |
| 429 | /**************************************************************************** |
| 430 | * list_all_params |
| 431 | * |
| 432 | * Attempt to list all CMOS parameters. Return 1 if error was encountered. |
| 433 | * Else return OK. |
| 434 | ****************************************************************************/ |
| 435 | static int list_all_params (void) |
| 436 | { const cmos_entry_t *e; |
| 437 | int result; |
| 438 | |
| 439 | result = OK; |
| 440 | |
| 441 | for (e = first_cmos_entry(); e != NULL; e = next_cmos_entry(e)) |
| 442 | { if ((e->config == CMOS_ENTRY_RESERVED) || is_checksum_name(e->name)) |
| 443 | continue; |
| 444 | |
| 445 | if (list_cmos_entry(e, TRUE)) |
| 446 | result = 1; |
| 447 | } |
| 448 | |
| 449 | return result; |
| 450 | } |
| 451 | |
| 452 | /**************************************************************************** |
| 453 | * list_param_enums |
| 454 | * |
| 455 | * List all possible values for CMOS parameter given by 'name'. |
| 456 | ****************************************************************************/ |
| 457 | static void list_param_enums (const char name[]) |
| 458 | { const cmos_entry_t *e; |
| 459 | const cmos_enum_t *p; |
| 460 | |
| 461 | if (is_checksum_name(name) || (e = find_cmos_entry(name)) == NULL) |
| 462 | { fprintf(stderr, "%s: CMOS parameter %s not found.\n", prog_name, name); |
| 463 | exit(1); |
| 464 | } |
| 465 | |
| 466 | switch (e->config) |
| 467 | { case CMOS_ENTRY_ENUM: |
| 468 | for (p = first_cmos_enum_id(e->config_id); |
| 469 | p != NULL; |
| 470 | p = next_cmos_enum_id(p)) |
| 471 | printf("%s\n", p->text); |
| 472 | |
| 473 | break; |
| 474 | |
| 475 | case CMOS_ENTRY_HEX: |
| 476 | printf("Parameter %s requires a %u-bit unsigned integer.\n", name, |
| 477 | e->length); |
| 478 | break; |
| 479 | |
| 480 | case CMOS_ENTRY_RESERVED: |
| 481 | printf("Parameter %s is reserved.\n", name); |
| 482 | break; |
| 483 | |
| 484 | default: |
| 485 | BUG(); |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | /**************************************************************************** |
| 490 | * set_one_param |
| 491 | * |
| 492 | * Set the CMOS parameter given by 'name' to 'value'. The 'name' parameter |
| 493 | * is case-sensitive. If we are setting an enum parameter, then 'value' is |
| 494 | * interpreted as a case-sensitive string that must match the option name |
| 495 | * exactly. If we are setting a 'hex' parameter, then 'value' is treated as |
| 496 | * a string representation of an unsigned integer that may be specified in |
| 497 | * decimal, hex, or octal. |
| 498 | ****************************************************************************/ |
| 499 | static void set_one_param (const char name[], const char value[]) |
| 500 | { const cmos_entry_t *e; |
| 501 | unsigned long long n; |
| 502 | |
| 503 | if (is_checksum_name(name) || (e = find_cmos_entry(name)) == NULL) |
| 504 | { fprintf(stderr, "%s: CMOS parameter %s not found.", prog_name, name); |
| 505 | exit(1); |
| 506 | } |
| 507 | |
| 508 | switch (prepare_cmos_write(e, value, &n)) |
| 509 | { case OK: |
| 510 | break; |
| 511 | |
| 512 | case CMOS_OP_BAD_ENUM_VALUE: |
| 513 | fprintf(stderr, "%s: Bad value for parameter %s.", prog_name, name); |
| 514 | goto fail; |
| 515 | |
| 516 | case CMOS_OP_NEGATIVE_INT: |
| 517 | fprintf(stderr, |
| 518 | "%s: This program does not support assignment of negative " |
| 519 | "numbers to LinuxBIOS parameters.", prog_name); |
| 520 | goto fail; |
| 521 | |
| 522 | case CMOS_OP_INVALID_INT: |
| 523 | fprintf(stderr, "%s: %s is not a valid integer.", prog_name, value); |
| 524 | goto fail; |
| 525 | |
| 526 | case CMOS_OP_RESERVED: |
| 527 | fprintf(stderr, |
| 528 | "%s: Can not modify reserved LinuxBIOS parameter %s.", |
| 529 | prog_name, name); |
| 530 | goto fail; |
| 531 | |
| 532 | case CMOS_OP_VALUE_TOO_WIDE: |
| 533 | fprintf(stderr, |
| 534 | "%s: Can not write value %s to CMOS parameter %s that is " |
| 535 | "only %d bits wide.", prog_name, value, name, e->length); |
| 536 | goto fail; |
| 537 | |
| 538 | case CMOS_OP_NO_MATCHING_ENUM: |
| 539 | fprintf(stderr, |
| 540 | "%s: LinuxBIOS parameter %s has no matching enums.", |
| 541 | prog_name, name); |
| 542 | goto fail; |
| 543 | |
| 544 | case CMOS_AREA_OUT_OF_RANGE: |
| 545 | fprintf(stderr, |
| 546 | "%s: The CMOS area specified by the layout info for " |
| 547 | "LinuxBIOS parameter %s is out of range.", prog_name, name); |
| 548 | goto fail; |
| 549 | |
| 550 | case CMOS_AREA_OVERLAPS_RTC: |
| 551 | fprintf(stderr, |
| 552 | "%s: The CMOS area specified by the layout info for " |
| 553 | "LinuxBIOS parameter %s overlaps the realtime clock area.", |
| 554 | prog_name, name); |
| 555 | goto fail; |
| 556 | |
| 557 | case CMOS_AREA_TOO_WIDE: |
| 558 | fprintf(stderr, |
| 559 | "%s: The CMOS area specified by the layout info for " |
| 560 | "LinuxBIOS parameter %s is too wide.", |
| 561 | prog_name, name); |
| 562 | goto fail; |
| 563 | |
| 564 | default: |
| 565 | fprintf(stderr, |
| 566 | "%s: Unknown error encountered while attempting to modify " |
| 567 | "LinuxBIOS parameter %s.", prog_name, name); |
| 568 | goto fail; |
| 569 | } |
| 570 | |
| 571 | /* write the value to nonvolatile RAM */ |
| 572 | set_iopl(3); |
| 573 | cmos_write(e->bit, e->length, n); |
| 574 | cmos_checksum_write(cmos_checksum_compute()); |
| 575 | set_iopl(0); |
| 576 | return; |
| 577 | |
| 578 | fail: |
| 579 | fprintf(stderr, " CMOS write not performed.\n"); |
| 580 | exit(1); |
| 581 | } |
| 582 | |
| 583 | /**************************************************************************** |
| 584 | * set_params |
| 585 | * |
| 586 | * Set LinuxBIOS parameters according to the contents of file 'f'. |
| 587 | ****************************************************************************/ |
| 588 | static void set_params (FILE *f) |
| 589 | { /* First process the input file. Then perform writes only if there were |
| 590 | * no problems processing the input. Either all values will be written |
| 591 | * successfully or no values will be written. |
| 592 | */ |
| 593 | do_cmos_writes(process_input_file(f)); |
| 594 | } |
| 595 | |
| 596 | /**************************************************************************** |
| 597 | * parse_assignment |
| 598 | * |
| 599 | * Parse the string 'arg' (which supposedly represents an assignment) into a |
| 600 | * NAME and a VALUE. If 'arg' does not conform to the proper assignment |
| 601 | * syntax, exit with a usage message. Otherwise, on return, 'arg' is broken |
| 602 | * into substrings representing NAME and VALUE, and *name and *value are set |
| 603 | * to point to these two substrings. |
| 604 | ****************************************************************************/ |
| 605 | static void parse_assignment (char arg[], const char **name, |
| 606 | const char **value) |
| 607 | { static const size_t N_MATCHES = 4; |
| 608 | regmatch_t match[N_MATCHES]; |
| 609 | regex_t assignment; |
| 610 | |
| 611 | compile_reg_exprs(REG_EXTENDED | REG_NEWLINE, 1, assignment_regex, |
| 612 | &assignment); |
| 613 | |
| 614 | /* Does 'arg' conform to proper assignment syntax? If not, exit with a |
| 615 | * usage message. |
| 616 | */ |
| 617 | if (regexec(&assignment, arg, N_MATCHES, match, 0)) |
| 618 | usage(stderr); |
| 619 | |
| 620 | /* Ok, we found a valid assignment. Break it into two strings |
| 621 | * representing NAME and VALUE. |
| 622 | */ |
| 623 | arg[match[1].rm_eo] = '\0'; |
| 624 | arg[match[2].rm_eo] = '\0'; |
| 625 | *name = &arg[match[1].rm_so]; |
| 626 | *value = &arg[match[2].rm_so]; |
| 627 | |
| 628 | free_reg_exprs(1, &assignment); |
| 629 | } |
| 630 | |
| 631 | /**************************************************************************** |
| 632 | * list_cmos_entry |
| 633 | * |
| 634 | * Attempt to list the CMOS entry represented by 'e'. 'show_name' is a |
| 635 | * boolean value indicating whether the parameter name should be displayed |
| 636 | * along with its value. On success, return OK. On error, print an error |
| 637 | * message and return 1. |
| 638 | ****************************************************************************/ |
| 639 | static int list_cmos_entry (const cmos_entry_t *e, int show_name) |
| 640 | { const cmos_enum_t *p; |
| 641 | unsigned long long value; |
| 642 | |
| 643 | /* sanity check CMOS entry */ |
| 644 | switch (prepare_cmos_read(e)) |
| 645 | { case OK: |
| 646 | break; |
| 647 | |
| 648 | case CMOS_OP_RESERVED: |
| 649 | BUG(); |
| 650 | |
| 651 | case CMOS_AREA_OUT_OF_RANGE: |
| 652 | fprintf(stderr, "%s: Can not read LinuxBIOS parameter %s because " |
| 653 | "layout info specifies out of range CMOS area.\n", prog_name, |
| 654 | e->name); |
| 655 | return 1; |
| 656 | |
| 657 | case CMOS_AREA_OVERLAPS_RTC: |
| 658 | fprintf(stderr, "%s: Can not read LinuxBIOS parameter %s because " |
| 659 | "layout info specifies CMOS area that overlaps realtime " |
| 660 | "clock area.\n", prog_name, e->name); |
| 661 | return 1; |
| 662 | |
| 663 | case CMOS_AREA_TOO_WIDE: |
| 664 | fprintf(stderr, "%s: Can not read LinuxBIOS parameter %s because " |
| 665 | "layout info specifies CMOS area that is too wide.\n", |
| 666 | prog_name, e->name); |
| 667 | return 1; |
| 668 | |
| 669 | default: |
| 670 | fprintf(stderr, "%s: Unknown error encountered while attempting to " |
| 671 | "read LinuxBIOS parameter %s\n", prog_name, e->name); |
| 672 | return 1; |
| 673 | } |
| 674 | |
| 675 | /* read the value from CMOS */ |
| 676 | set_iopl(3); |
| 677 | value = cmos_read(e->bit, e->length); |
| 678 | set_iopl(0); |
| 679 | |
| 680 | /* display the value */ |
| 681 | switch (e->config) |
| 682 | { case CMOS_ENTRY_ENUM: |
| 683 | if ((p = find_cmos_enum(e->config_id, value)) == NULL) |
| 684 | { if (show_name) |
| 685 | printf("# Bad value -> %s = 0x%llx\n", e->name, value); |
| 686 | else |
| 687 | printf("Bad value -> 0x%llx\n", value); |
| 688 | } |
| 689 | else |
| 690 | { if (show_name) |
| 691 | printf("%s = %s\n", e->name, p->text); |
| 692 | else |
| 693 | printf("%s\n", p->text); |
| 694 | } |
| 695 | |
| 696 | break; |
| 697 | |
| 698 | case CMOS_ENTRY_HEX: |
| 699 | if (show_name) |
| 700 | printf("%s = 0x%llx\n", e->name, value); |
| 701 | else |
| 702 | printf("0x%llx\n", value); |
| 703 | |
| 704 | break; |
| 705 | |
| 706 | case CMOS_ENTRY_RESERVED: |
| 707 | default: |
| 708 | BUG(); |
| 709 | } |
| 710 | |
| 711 | return OK; |
| 712 | } |
| 713 | |
| 714 | /**************************************************************************** |
| 715 | * convert_checksum_value |
| 716 | * |
| 717 | * 'value' is the string representation of a checksum value that the user |
| 718 | * wishes to set using the -c option. Convert the string to a 16-bit |
| 719 | * unsigned integer and return the result. Exit with an error message if |
| 720 | * 'value' is invalid. |
| 721 | ****************************************************************************/ |
| 722 | static uint16_t convert_checksum_value (const char value[]) |
| 723 | { unsigned long n; |
| 724 | const char *p; |
| 725 | uint16_t result; |
| 726 | int negative; |
| 727 | |
| 728 | for (p = value; isspace(*p); p++); |
| 729 | |
| 730 | negative = (*p == '-'); |
| 731 | n = strtoul(value, (char **) &p, 0); |
| 732 | |
| 733 | if (*p) |
| 734 | { fprintf(stderr, "%s: Checksum value %s is not a valid integer.\n", |
| 735 | prog_name, value); |
| 736 | exit(1); |
| 737 | } |
| 738 | |
| 739 | if (negative) |
| 740 | { fprintf(stderr, |
| 741 | "%s: Checksum must be an unsigned integer.\n", prog_name); |
| 742 | exit(1); |
| 743 | } |
| 744 | |
| 745 | result = (uint16_t) n; |
| 746 | |
| 747 | if (result != n) |
| 748 | { fprintf(stderr, |
| 749 | "%s: Checksum value must fit within 16 bits.\n", prog_name); |
| 750 | exit(1); |
| 751 | } |
| 752 | |
| 753 | return result; |
| 754 | } |