Vladimir Serbinenko | 5a6b8d1 | 2014-05-24 16:34:29 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 Vladimir Serbinenko |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; version 2 of the License. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
Vladimir Serbinenko | 5a6b8d1 | 2014-05-24 16:34:29 +0200 | [diff] [blame] | 12 | */ |
| 13 | |
| 14 | #include <stdio.h> |
| 15 | #include <sys/mman.h> |
| 16 | #include <stdint.h> |
| 17 | #include <string.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <unistd.h> |
| 20 | #include <sys/types.h> |
| 21 | #include <sys/stat.h> |
| 22 | #include <fcntl.h> |
| 23 | #include <errno.h> |
| 24 | |
| 25 | typedef uint8_t u8; |
| 26 | typedef uint16_t u16; |
| 27 | typedef uint32_t u32; |
| 28 | |
| 29 | |
| 30 | typedef struct { |
| 31 | u16 signature; |
| 32 | u8 size; |
| 33 | u8 reserved[21]; |
| 34 | u16 pcir_offset; |
| 35 | u16 vbt_offset; |
| 36 | } __attribute__ ((packed)) optionrom_header_t; |
| 37 | |
| 38 | struct vbt_header { |
| 39 | u8 signature[20]; |
| 40 | u16 version; |
| 41 | u16 header_size; |
| 42 | u16 vbt_size; |
| 43 | u8 vbt_checksum; |
| 44 | u8 reserved0; |
| 45 | u32 bdb_offset; |
| 46 | u32 aim_offset[4]; |
| 47 | } __attribute__ ((packed)); |
| 48 | |
| 49 | struct bdb_header { |
| 50 | u8 signature[16]; |
| 51 | u16 version; |
| 52 | u16 header_size; |
| 53 | u16 bdb_size; |
| 54 | }; |
| 55 | |
| 56 | struct vbios_data { |
| 57 | u8 type; /* 0 == desktop, 1 == mobile */ |
| 58 | u8 relstage; |
| 59 | u8 chipset; |
| 60 | u8 lvds_present:1; |
| 61 | u8 tv_present:1; |
| 62 | u8 rsvd2:6; /* finish byte */ |
| 63 | u8 rsvd3[4]; |
| 64 | u8 signon[155]; |
| 65 | u8 copyright[61]; |
| 66 | u16 code_segment; |
| 67 | u8 dos_boot_mode; |
| 68 | u8 bandwidth_percent; |
| 69 | u8 rsvd4; /* popup memory size */ |
| 70 | u8 resize_pci_bios; |
| 71 | u8 rsvd5; /* is crt already on ddc2 */ |
| 72 | } __attribute__ ((packed)); |
| 73 | |
| 74 | struct bdb_general_features { |
| 75 | /* bits 1 */ |
| 76 | u8 panel_fitting:2; |
| 77 | u8 flexaim:1; |
| 78 | u8 msg_enable:1; |
| 79 | u8 clear_screen:3; |
| 80 | u8 color_flip:1; |
| 81 | |
| 82 | /* bits 2 */ |
| 83 | u8 download_ext_vbt:1; |
| 84 | u8 enable_ssc:1; |
| 85 | u8 ssc_freq:1; |
| 86 | u8 enable_lfp_on_override:1; |
| 87 | u8 disable_ssc_ddt:1; |
| 88 | u8 rsvd7:1; |
| 89 | u8 display_clock_mode:1; |
| 90 | u8 rsvd8:1; /* finish byte */ |
| 91 | |
| 92 | /* bits 3 */ |
| 93 | u8 disable_smooth_vision:1; |
| 94 | u8 single_dvi:1; |
| 95 | u8 rsvd9:1; |
| 96 | u8 fdi_rx_polarity_inverted:1; |
| 97 | u8 rsvd10:4; /* finish byte */ |
| 98 | |
| 99 | /* bits 4 */ |
| 100 | u8 legacy_monitor_detect; |
| 101 | |
| 102 | /* bits 5 */ |
| 103 | u8 int_crt_support:1; |
| 104 | u8 int_tv_support:1; |
| 105 | u8 int_efp_support:1; |
| 106 | u8 dp_ssc_enb:1; /* PCH attached eDP supports SSC */ |
| 107 | u8 dp_ssc_freq:1; /* SSC freq for PCH attached eDP */ |
| 108 | u8 rsvd11:3; /* finish byte */ |
| 109 | } __attribute__ ((packed)); |
| 110 | |
| 111 | struct common_child_dev_config { |
| 112 | u16 handle; |
| 113 | u16 device_type; |
| 114 | u8 not_common1[12]; |
| 115 | u8 dvo_port; |
| 116 | u8 i2c_pin; |
| 117 | u8 slave_addr; |
| 118 | u8 ddc_pin; |
| 119 | u16 edid_ptr; |
| 120 | u8 not_common3[6]; |
| 121 | u8 dvo_wiring; |
| 122 | u8 not_common4[4]; |
| 123 | } __attribute__ ((packed)); |
| 124 | |
| 125 | struct bdb_general_definitions { |
| 126 | /* DDC GPIO */ |
| 127 | u8 crt_ddc_gmbus_pin; |
| 128 | |
| 129 | /* DPMS bits */ |
| 130 | u8 dpms_acpi:1; |
| 131 | u8 skip_boot_crt_detect:1; |
| 132 | u8 dpms_aim:1; |
| 133 | u8 rsvd1:5; /* finish byte */ |
| 134 | |
| 135 | /* boot device bits */ |
| 136 | u8 boot_display[2]; |
| 137 | u8 child_dev_size; |
| 138 | |
| 139 | /* |
| 140 | * Device info: |
| 141 | * If TV is present, it'll be at devices[0]. |
| 142 | * LVDS will be next, either devices[0] or [1], if present. |
| 143 | * On some platforms the number of device is 6. But could be as few as |
| 144 | * 4 if both TV and LVDS are missing. |
| 145 | * And the device num is related with the size of general definition |
| 146 | * block. It is obtained by using the following formula: |
| 147 | * number = (block_size - sizeof(bdb_general_definitions))/ |
| 148 | * sizeof(child_device_config); |
| 149 | */ |
| 150 | struct common_child_dev_config devices[0]; |
| 151 | } __attribute__ ((packed)); |
| 152 | |
| 153 | struct bdb_driver_features { |
| 154 | u8 boot_dev_algorithm:1; |
| 155 | u8 block_display_switch:1; |
| 156 | u8 allow_display_switch:1; |
| 157 | u8 hotplug_dvo:1; |
| 158 | u8 dual_view_zoom:1; |
| 159 | u8 int15h_hook:1; |
| 160 | u8 sprite_in_clone:1; |
| 161 | u8 primary_lfp_id:1; |
| 162 | |
| 163 | u16 boot_mode_x; |
| 164 | u16 boot_mode_y; |
| 165 | u8 boot_mode_bpp; |
| 166 | u8 boot_mode_refresh; |
| 167 | |
| 168 | u16 enable_lfp_primary:1; |
| 169 | u16 selective_mode_pruning:1; |
| 170 | u16 dual_frequency:1; |
| 171 | u16 render_clock_freq:1; /* 0: high freq; 1: low freq */ |
| 172 | u16 nt_clone_support:1; |
| 173 | u16 power_scheme_ui:1; /* 0: CUI; 1: 3rd party */ |
| 174 | u16 sprite_display_assign:1; /* 0: secondary; 1: primary */ |
| 175 | u16 cui_aspect_scaling:1; |
| 176 | u16 preserve_aspect_ratio:1; |
| 177 | u16 sdvo_device_power_down:1; |
| 178 | u16 crt_hotplug:1; |
| 179 | u16 lvds_config:2; |
| 180 | u16 tv_hotplug:1; |
| 181 | u16 hdmi_config:2; |
| 182 | |
| 183 | u8 static_display:1; |
| 184 | u8 reserved2:7; |
| 185 | u16 legacy_crt_max_x; |
| 186 | u16 legacy_crt_max_y; |
| 187 | u8 legacy_crt_max_refresh; |
| 188 | |
| 189 | u8 hdmi_termination; |
| 190 | u8 custom_vbt_version; |
| 191 | } __attribute__ ((packed)); |
| 192 | |
| 193 | struct bdb_lvds_options { |
| 194 | u8 panel_type; |
| 195 | u8 rsvd1; |
| 196 | /* LVDS capabilities, stored in a dword */ |
| 197 | u8 pfit_mode:2; |
| 198 | u8 pfit_text_mode_enhanced:1; |
| 199 | u8 pfit_gfx_mode_enhanced:1; |
| 200 | u8 pfit_ratio_auto:1; |
| 201 | u8 pixel_dither:1; |
| 202 | u8 lvds_edid:1; |
| 203 | u8 rsvd2:1; |
| 204 | u8 rsvd4; |
| 205 | } __attribute__ ((packed)); |
| 206 | |
| 207 | struct bdb_sdvo_lvds_options { |
| 208 | u8 panel_backlight; |
| 209 | u8 h40_set_panel_type; |
| 210 | u8 panel_type; |
| 211 | u8 ssc_clk_freq; |
| 212 | u16 als_low_trip; |
| 213 | u16 als_high_trip; |
| 214 | u8 sclalarcoeff_tab_row_num; |
| 215 | u8 sclalarcoeff_tab_row_size; |
| 216 | u8 coefficient[8]; |
| 217 | u8 panel_misc_bits_1; |
| 218 | u8 panel_misc_bits_2; |
| 219 | u8 panel_misc_bits_3; |
| 220 | u8 panel_misc_bits_4; |
| 221 | } __attribute__ ((packed)); |
| 222 | |
| 223 | |
| 224 | #define BDB_GENERAL_FEATURES 1 |
| 225 | #define BDB_GENERAL_DEFINITIONS 2 |
| 226 | |
| 227 | #define BDB_DRIVER_FEATURES 12 |
| 228 | #define BDB_SDVO_LVDS_OPTIONS 22 |
| 229 | #define BDB_SDVO_PANEL_DTDS 23 |
| 230 | #define BDB_LVDS_OPTIONS 40 |
| 231 | #define BDB_LVDS_LFP_DATA_PTRS 41 |
| 232 | #define BDB_LVDS_LFP_DATA 42 |
| 233 | |
| 234 | #define BDB_SKIP 254 |
| 235 | |
| 236 | static void parse_vbt(const void *vbt) |
| 237 | { |
| 238 | const struct vbt_header *head = vbt; |
| 239 | const struct bdb_header *bdb; |
| 240 | int i; |
| 241 | const u8 *ptr; |
| 242 | int is_first_skip = 1; |
| 243 | |
| 244 | if (memcmp(head->signature, "$VBT", 4) != 0) { |
| 245 | fprintf(stderr, "invalid VBT signature\n"); |
| 246 | exit(1); |
| 247 | } |
| 248 | printf("signature: <%20.20s>\n", head->signature); |
| 249 | printf("version: %d.%02d\n", head->version / 100, |
| 250 | head->version % 100); |
| 251 | if (head->header_size != sizeof(struct vbt_header)) |
| 252 | printf("header size: 0x%x\n", head->header_size); |
| 253 | printf("VBT size: 0x%x\n", head->vbt_size); |
| 254 | printf("VBT checksum: 0x%x\n", head->vbt_checksum); |
| 255 | if (head->reserved0) |
| 256 | printf("header reserved0: 0x%x\n", head->reserved0); |
| 257 | if (head->bdb_offset != sizeof(struct vbt_header)) |
| 258 | printf("BDB offset: 0x%x\n", head->bdb_offset); |
| 259 | |
| 260 | for (i = 0; i < 4; i++) |
| 261 | if (head->aim_offset[i]) |
| 262 | printf("AIM[%d] offset: 0x%x\n", i, |
| 263 | head->aim_offset[i]); |
| 264 | bdb = (const void *) ((const char *) vbt + head->bdb_offset); |
| 265 | |
| 266 | if (memcmp("BIOS_DATA_BLOCK ", bdb->signature, 16) != 0) { |
| 267 | fprintf(stderr, "invalid BDB signature:%s\n", |
| 268 | bdb->signature); |
| 269 | exit(1); |
| 270 | } |
| 271 | printf("BDB version: %d.%02d\n", bdb->version / 100, |
| 272 | bdb->version % 100); |
| 273 | if (bdb->header_size != sizeof(struct bdb_header)) |
| 274 | printf("BDB header size: 0x%x\n", bdb->header_size); |
| 275 | if (bdb->bdb_size != head->vbt_size - head->bdb_offset) |
| 276 | printf("BDB size: 0x%x\n", bdb->bdb_size); |
| 277 | for (ptr = (const u8 *) bdb + bdb->header_size; |
| 278 | ptr < (const u8 *) bdb + bdb->bdb_size;) { |
| 279 | u16 secsz = (ptr[1] | (ptr[2] << 8)); |
| 280 | u8 sectype = ptr[0]; |
| 281 | const u8 *section = ptr + 3; |
| 282 | |
| 283 | printf("section type %d, size 0x%x\n", sectype, secsz); |
| 284 | ptr += secsz + 3; |
| 285 | switch (sectype) { |
| 286 | case BDB_GENERAL_FEATURES:{ |
| 287 | const struct bdb_general_features *sec = |
| 288 | (const void *) section; |
| 289 | printf("General features:\n"); |
| 290 | |
| 291 | if (sec->panel_fitting) |
| 292 | printf("\tpanel_fitting = 0x%x\n", |
| 293 | sec->panel_fitting); |
| 294 | if (sec->flexaim) |
| 295 | printf("\tflexaim = 0x%x\n", |
| 296 | sec->flexaim); |
| 297 | if (sec->msg_enable) |
| 298 | printf("\tmsg_enable = 0x%x\n", |
| 299 | sec->msg_enable); |
| 300 | if (sec->clear_screen) |
| 301 | printf("\tclear_screen = 0x%x\n", |
| 302 | sec->clear_screen); |
| 303 | if (sec->color_flip) |
| 304 | printf("\tcolor_flip = 0x%x\n", |
| 305 | sec->color_flip); |
| 306 | if (sec->download_ext_vbt) |
| 307 | printf |
| 308 | ("\tdownload_ext_vbt = 0x%x\n", |
| 309 | sec->download_ext_vbt); |
| 310 | printf("\t*enable_ssc = 0x%x\n", |
| 311 | sec->enable_ssc); |
| 312 | printf("\t*ssc_freq = 0x%x\n", |
| 313 | sec->ssc_freq); |
| 314 | if (sec->enable_lfp_on_override) |
| 315 | printf |
| 316 | ("\tenable_lfp_on_override = 0x%x\n", |
| 317 | sec->enable_lfp_on_override); |
| 318 | if (sec->disable_ssc_ddt) |
| 319 | printf |
| 320 | ("\tdisable_ssc_ddt = 0x%x\n", |
| 321 | sec->disable_ssc_ddt); |
| 322 | if (sec->rsvd7) |
| 323 | printf("\trsvd7 = 0x%x\n", |
| 324 | sec->rsvd7); |
| 325 | printf("\t*display_clock_mode = 0x%x\n", |
| 326 | sec->display_clock_mode); |
| 327 | if (sec->rsvd8) |
| 328 | printf("\trsvd8 = 0x%x\n", |
| 329 | sec->rsvd8); |
| 330 | printf("\tdisable_smooth_vision = 0x%x\n", |
| 331 | sec->disable_smooth_vision); |
| 332 | if (sec->single_dvi) |
| 333 | printf("\tsingle_dvi = 0x%x\n", |
| 334 | sec->single_dvi); |
| 335 | if (sec->rsvd9) |
| 336 | printf("\trsvd9 = 0x%x\n", |
| 337 | sec->rsvd9); |
| 338 | printf |
| 339 | ("\t*fdi_rx_polarity_inverted = 0x%x\n", |
| 340 | sec->fdi_rx_polarity_inverted); |
| 341 | if (sec->rsvd10) |
| 342 | printf("\trsvd10 = 0x%x\n", |
| 343 | sec->rsvd10); |
| 344 | if (sec->legacy_monitor_detect) |
| 345 | printf |
| 346 | ("\tlegacy_monitor_detect = 0x%x\n", |
| 347 | sec->legacy_monitor_detect); |
| 348 | printf("\t*int_crt_support = 0x%x\n", |
| 349 | sec->int_crt_support); |
| 350 | printf("\t*int_tv_support = 0x%x\n", |
| 351 | sec->int_tv_support); |
| 352 | if (sec->int_efp_support) |
| 353 | printf |
| 354 | ("\tint_efp_support = 0x%x\n", |
| 355 | sec->int_efp_support); |
| 356 | if (sec->dp_ssc_enb) |
| 357 | printf("\tdp_ssc_enb = 0x%x\n", |
| 358 | sec->dp_ssc_enb); |
| 359 | if (sec->dp_ssc_freq) |
| 360 | printf("\tdp_ssc_freq = 0x%x\n", |
| 361 | sec->dp_ssc_freq); |
| 362 | if (sec->rsvd11) |
| 363 | printf("\trsvd11 = 0x%x\n", |
| 364 | sec->rsvd11); |
| 365 | break; |
| 366 | } |
| 367 | case BDB_DRIVER_FEATURES:{ |
| 368 | const struct bdb_driver_features *sec = |
| 369 | (const void *) section; |
| 370 | printf("\t*LVDS config: %d\n", |
| 371 | sec->lvds_config); |
| 372 | printf("\t*Dual frequency: %d\n", |
| 373 | sec->dual_frequency); |
| 374 | |
| 375 | break; |
| 376 | } |
| 377 | case BDB_SDVO_LVDS_OPTIONS:{ |
| 378 | const struct bdb_sdvo_lvds_options *sec = |
| 379 | (const void *) section; |
| 380 | printf("\t*Panel type: %d\n", |
| 381 | sec->panel_type); |
| 382 | |
| 383 | break; |
| 384 | } |
| 385 | case BDB_GENERAL_DEFINITIONS:{ |
| 386 | const struct bdb_general_definitions *sec = |
| 387 | (const void *) section; |
| 388 | int ndev; |
| 389 | printf("\t*CRT DDC GMBUS pin: %d\n", |
| 390 | sec->crt_ddc_gmbus_pin); |
| 391 | |
| 392 | printf("\tDPMS ACPI: %d\n", |
| 393 | sec->dpms_acpi); |
| 394 | printf("\tSkip boot CRT detect: %d\n", |
| 395 | sec->skip_boot_crt_detect); |
| 396 | printf("\tDPMS aim: %d\n", sec->dpms_aim); |
| 397 | if (sec->rsvd1) |
| 398 | printf("\trsvd1: 0x%x\n", |
| 399 | sec->rsvd1); |
| 400 | printf("\tboot_display: { %x, %x }\n", |
| 401 | sec->boot_display[0], |
| 402 | sec->boot_display[1]); |
| 403 | if (sec->child_dev_size != |
| 404 | sizeof(struct common_child_dev_config)) |
| 405 | printf("\tchild_dev_size: %d\n", |
| 406 | sec->child_dev_size); |
| 407 | ndev = (secsz - sizeof(*sec)) / |
| 408 | sizeof(struct common_child_dev_config); |
| 409 | printf("\t%d devices\n", ndev); |
| 410 | for (i = 0; i < ndev; i++) { |
| 411 | printf("\t*device type: %x ", |
| 412 | sec->devices[i]. |
| 413 | device_type); |
| 414 | #define DEVICE_TYPE_INT_LFP 0x1022 |
| 415 | #define DEVICE_TYPE_INT_TV 0x1009 |
| 416 | #define DEVICE_TYPE_EFP_DVI_HOTPLUG_PWR 0x6052 |
| 417 | switch (sec->devices[i].device_type) { |
| 418 | case DEVICE_TYPE_INT_LFP: |
| 419 | printf("(flat panel)\n"); |
| 420 | break; |
| 421 | case DEVICE_TYPE_INT_TV: |
| 422 | printf("(TV)\n"); |
| 423 | break; |
| 424 | case DEVICE_TYPE_EFP_DVI_HOTPLUG_PWR: |
| 425 | printf |
| 426 | ("(DVI)\n"); |
| 427 | break; |
| 428 | case 0: |
| 429 | printf("(Empty)\n"); |
| 430 | break; |
| 431 | default: |
| 432 | printf("(Unknown)\n"); |
| 433 | break; |
| 434 | } |
| 435 | if (!sec->devices[i].device_type) |
| 436 | continue; |
| 437 | printf("\t *dvo_port: %x\n", |
| 438 | sec->devices[i].dvo_port); |
| 439 | printf("\t *i2c_pin: %x\n", |
| 440 | sec->devices[i].i2c_pin); |
| 441 | printf("\t *slave_addr: %x\n", |
| 442 | sec->devices[i].slave_addr); |
| 443 | printf("\t *ddc_pin: %x\n", |
| 444 | sec->devices[i].ddc_pin); |
| 445 | printf("\t *dvo_wiring: %x\n", |
| 446 | sec->devices[i].dvo_wiring); |
| 447 | printf("\t edid_ptr: %x\n", |
| 448 | sec->devices[i].edid_ptr); |
| 449 | } |
| 450 | |
| 451 | break; |
| 452 | } |
| 453 | case BDB_SKIP:{ |
| 454 | const struct vbios_data *sec = |
| 455 | (const void *) section; |
| 456 | if (!is_first_skip) |
| 457 | break; |
| 458 | is_first_skip = 0; |
| 459 | printf("\ttype: %x\n", sec->type); |
| 460 | printf("\trelstage: %x\n", sec->relstage); |
| 461 | printf("\tchipset: %x\n", sec->chipset); |
| 462 | printf(sec->lvds_present ? "\tLVDS\n" |
| 463 | : "\tNo LVDS\n"); |
| 464 | printf(sec->tv_present ? "\tTV\n" |
| 465 | : "\tNo TV\n"); |
| 466 | if (sec->rsvd2) |
| 467 | printf("\trsvd2: 0x%x\n", |
| 468 | sec->rsvd2); |
| 469 | for (i = 0; i < 4; i++) |
| 470 | if (sec->rsvd3[i]) |
| 471 | printf |
| 472 | ("\trsvd3[%d]: 0x%x\n", |
| 473 | i, sec->rsvd3[i]); |
| 474 | printf("\tSignon: %.155s\n", sec->signon); |
| 475 | printf("\tCopyright: %.155s\n", |
| 476 | sec->copyright); |
| 477 | printf("\tCode segment: %x\n", |
| 478 | sec->code_segment); |
| 479 | printf("\tDOS Boot mode: %x\n", |
| 480 | sec->dos_boot_mode); |
| 481 | printf("\tBandwidth percent: %x\n", |
| 482 | sec->bandwidth_percent); |
| 483 | if (sec->rsvd4) |
| 484 | printf("\trsvd4: 0x%x\n", |
| 485 | sec->rsvd4); |
| 486 | printf("\tBandwidth percent: %x\n", |
| 487 | sec->resize_pci_bios); |
| 488 | if (sec->rsvd5) |
| 489 | printf("\trsvd5: 0x%x\n", |
| 490 | sec->rsvd5); |
| 491 | break; |
| 492 | } |
| 493 | } |
| 494 | } |
| 495 | |
| 496 | } |
| 497 | |
| 498 | static void parse_vbios(const void *ptr) |
| 499 | { |
| 500 | const optionrom_header_t *oh; |
| 501 | oh = ptr; |
| 502 | if (oh->signature != 0xaa55) { |
| 503 | fprintf(stderr, "bad oprom signature: %x\n", |
| 504 | oh->signature); |
| 505 | return; |
| 506 | } |
| 507 | if (!oh->vbt_offset) { |
| 508 | fprintf(stderr, "no VBT found\n"); |
| 509 | return; |
| 510 | } |
| 511 | parse_vbt((const char *) ptr + oh->vbt_offset); |
| 512 | } |
| 513 | |
| 514 | int main(int argc, char **argv) |
| 515 | { |
| 516 | const void *ptr; |
| 517 | int fd; |
Patrick Georgi | 1fcebe7 | 2016-07-29 18:28:42 +0200 | [diff] [blame] | 518 | off_t offset; |
Vladimir Serbinenko | 5a6b8d1 | 2014-05-24 16:34:29 +0200 | [diff] [blame] | 519 | if (argc == 2) { |
| 520 | fd = open(argv[1], O_RDONLY); |
Patrick Georgi | 1fcebe7 | 2016-07-29 18:28:42 +0200 | [diff] [blame] | 521 | offset = 0; |
Vladimir Serbinenko | 5a6b8d1 | 2014-05-24 16:34:29 +0200 | [diff] [blame] | 522 | } else { |
| 523 | fd = open("/dev/mem", O_RDONLY); |
Patrick Georgi | 1fcebe7 | 2016-07-29 18:28:42 +0200 | [diff] [blame] | 524 | offset = 0xc0000; |
Vladimir Serbinenko | 5a6b8d1 | 2014-05-24 16:34:29 +0200 | [diff] [blame] | 525 | } |
Patrick Georgi | 1fcebe7 | 2016-07-29 18:28:42 +0200 | [diff] [blame] | 526 | if (fd < 0) { |
| 527 | fprintf(stderr, "open failed: %s\n", strerror(errno)); |
| 528 | return 1; |
| 529 | } |
| 530 | |
| 531 | ptr = mmap(0, 65536, PROT_READ, MAP_SHARED, fd, offset); |
Vladimir Serbinenko | 5a6b8d1 | 2014-05-24 16:34:29 +0200 | [diff] [blame] | 532 | if (ptr == MAP_FAILED) { |
| 533 | fprintf(stderr, "mmap failed: %s\n", strerror(errno)); |
| 534 | return 1; |
| 535 | } |
| 536 | parse_vbios(ptr); |
| 537 | close(fd); |
| 538 | return 0; |
| 539 | } |