Randall Spangler | 1b1998d | 2011-07-01 16:12:47 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| 2 | * Use of this source code is governed by a BSD-style license that can be |
| 3 | * found in the LICENSE file. |
| 4 | * |
| 5 | * High-level firmware wrapper API - entry points for kernel selection |
| 6 | */ |
| 7 | |
| 8 | #include "gbb_header.h" |
| 9 | #include "load_kernel_fw.h" |
| 10 | #include "utility.h" |
| 11 | #include "vboot_api.h" |
| 12 | #include "vboot_common.h" |
| 13 | #include "vboot_nvstorage.h" |
| 14 | |
| 15 | |
| 16 | /* Global variables */ |
| 17 | static uint32_t disp_current_screen = VB_SCREEN_BLANK; |
| 18 | static uint32_t disp_width = 0, disp_height = 0; |
| 19 | static VbNvContext vnc; |
| 20 | |
| 21 | |
| 22 | #ifdef CHROMEOS_ENVIRONMENT |
| 23 | /* Global variable accessors for unit tests */ |
| 24 | VbNvContext* VbApiKernelGetVnc(void) { |
| 25 | return &vnc; |
| 26 | } |
| 27 | #endif |
| 28 | |
| 29 | |
| 30 | /* Set recovery request */ |
| 31 | static void VbSetRecoveryRequest(uint32_t recovery_request) { |
| 32 | VBDEBUG(("VbSetRecoveryRequest(%d)\n", (int)recovery_request)); |
| 33 | |
| 34 | VbNvSetup(&vnc); |
| 35 | VbNvSet(&vnc, VBNV_RECOVERY_REQUEST, recovery_request); |
| 36 | VbNvTeardown(&vnc); |
| 37 | if (vnc.raw_changed) |
| 38 | VbExNvStorageWrite(vnc.raw); |
| 39 | } |
| 40 | |
| 41 | |
| 42 | /* Get the number of localizations in the GBB bitmap data. */ |
| 43 | static VbError_t VbGetLocalizationCount(VbCommonParams* cparams, |
| 44 | uint32_t* count) { |
| 45 | GoogleBinaryBlockHeader* gbb = (GoogleBinaryBlockHeader*)cparams->gbb_data; |
| 46 | BmpBlockHeader* hdr; |
| 47 | |
| 48 | /* Default to 0 on error */ |
| 49 | *count = 0; |
| 50 | |
| 51 | /* Make sure the bitmap data is inside the GBB and is non-zero in size */ |
| 52 | if (0 == gbb->bmpfv_size || |
| 53 | gbb->bmpfv_offset > cparams->gbb_size || |
| 54 | gbb->bmpfv_offset + gbb->bmpfv_size > cparams->gbb_size) { |
| 55 | return 1; |
| 56 | } |
| 57 | |
| 58 | /* Sanity-check the bitmap block header */ |
| 59 | hdr = (BmpBlockHeader *)(((uint8_t*)gbb) + gbb->bmpfv_offset); |
| 60 | if ((0 != Memcmp(hdr->signature, BMPBLOCK_SIGNATURE, |
| 61 | BMPBLOCK_SIGNATURE_SIZE)) || |
| 62 | (hdr->major_version > BMPBLOCK_MAJOR_VERSION) || |
| 63 | ((hdr->major_version == BMPBLOCK_MAJOR_VERSION) && |
| 64 | (hdr->minor_version > BMPBLOCK_MINOR_VERSION))) { |
| 65 | return 1; |
| 66 | } |
| 67 | |
| 68 | *count = hdr->number_of_localizations; |
| 69 | return VBERROR_SUCCESS; |
| 70 | } |
| 71 | |
| 72 | |
| 73 | /* Display a screen from the GBB. */ |
| 74 | static VbError_t VbDisplayScreenFromGBB(VbCommonParams* cparams, |
| 75 | uint32_t screen) { |
| 76 | GoogleBinaryBlockHeader* gbb = (GoogleBinaryBlockHeader*)cparams->gbb_data; |
| 77 | uint8_t* bmpfv = NULL; |
| 78 | BmpBlockHeader* hdr; |
| 79 | ScreenLayout* layout; |
| 80 | ImageInfo* image_info; |
| 81 | uint32_t screen_index; |
| 82 | uint32_t localization = 0; |
| 83 | VbError_t retval = 1; /* Assume error until proven successful */ |
| 84 | uint32_t offset; |
| 85 | uint32_t i; |
| 86 | |
| 87 | /* Make sure the bitmap data is inside the GBB and is non-zero in size */ |
| 88 | if (0 == gbb->bmpfv_size || |
| 89 | gbb->bmpfv_offset > cparams->gbb_size || |
| 90 | gbb->bmpfv_offset + gbb->bmpfv_size > cparams->gbb_size) { |
| 91 | VBDEBUG(("VbDisplayScreenFromGBB(): invalid bmpfv offset/size\n")); |
| 92 | return 1; |
| 93 | } |
| 94 | |
| 95 | /* Copy bitmap data from GBB into RAM for speed */ |
| 96 | bmpfv = (uint8_t*)VbExMalloc(gbb->bmpfv_size); |
| 97 | Memcpy(bmpfv, ((uint8_t*)gbb) + gbb->bmpfv_offset, gbb->bmpfv_size); |
| 98 | |
| 99 | /* Sanity-check the bitmap block header */ |
| 100 | hdr = (BmpBlockHeader *)bmpfv; |
| 101 | if ((0 != Memcmp(hdr->signature, BMPBLOCK_SIGNATURE, |
| 102 | BMPBLOCK_SIGNATURE_SIZE)) || |
| 103 | (hdr->major_version > BMPBLOCK_MAJOR_VERSION) || |
| 104 | ((hdr->major_version == BMPBLOCK_MAJOR_VERSION) && |
| 105 | (hdr->minor_version > BMPBLOCK_MINOR_VERSION))) { |
| 106 | VBDEBUG(("VbDisplayScreenFromGBB(): invalid/too new bitmap header\n")); |
| 107 | goto VbDisplayScreenFromGBB_exit; |
| 108 | } |
| 109 | |
| 110 | /* Translate screen ID into index. Note that not all screens are in the |
| 111 | * GBB. */ |
| 112 | /* TODO: ensure screen IDs match indices? Having this translation |
| 113 | * here is awful. */ |
| 114 | switch (screen) { |
| 115 | case VB_SCREEN_DEVELOPER_WARNING: |
| 116 | screen_index = 0; |
| 117 | break; |
| 118 | case VB_SCREEN_RECOVERY_REMOVE: |
| 119 | screen_index = 1; |
| 120 | break; |
| 121 | case VB_SCREEN_RECOVERY_NO_GOOD: |
| 122 | screen_index = 2; |
| 123 | break; |
| 124 | case VB_SCREEN_RECOVERY_INSERT: |
| 125 | screen_index = 3; |
| 126 | break; |
| 127 | case VB_SCREEN_BLANK: |
| 128 | case VB_SCREEN_DEVELOPER_EGG: |
| 129 | default: |
| 130 | /* Screens which aren't in the GBB */ |
| 131 | VBDEBUG(("VbDisplayScreenFromGBB(): screen %d not in the GBB\n", |
| 132 | (int)screen)); |
| 133 | goto VbDisplayScreenFromGBB_exit; |
| 134 | } |
| 135 | if (screen_index >= hdr->number_of_screenlayouts) { |
| 136 | VBDEBUG(("VbDisplayScreenFromGBB(): screen %d index %d not in the GBB\n", |
| 137 | (int)screen, (int)screen_index)); |
| 138 | goto VbDisplayScreenFromGBB_exit; |
| 139 | } |
| 140 | |
| 141 | /* Clip localization to the number of localizations present in the GBB */ |
| 142 | VbNvSetup(&vnc); |
| 143 | VbNvGet(&vnc, VBNV_LOCALIZATION_INDEX, &localization); |
| 144 | if (localization >= hdr->number_of_localizations) { |
| 145 | localization = 0; |
| 146 | VbNvSet(&vnc, VBNV_LOCALIZATION_INDEX, localization); |
| 147 | } |
| 148 | VbNvTeardown(&vnc); |
| 149 | if (vnc.raw_changed) |
| 150 | VbExNvStorageWrite(vnc.raw); |
| 151 | |
| 152 | /* Calculate offset of screen layout = start of screen stuff + |
| 153 | * correct locale + correct screen. */ |
| 154 | offset = sizeof(BmpBlockHeader) + |
| 155 | localization * hdr->number_of_screenlayouts * sizeof(ScreenLayout) + |
| 156 | screen_index * sizeof(ScreenLayout); |
| 157 | VBDEBUG(("VbDisplayScreenFromGBB(): scr_%d_%d at offset 0x%x\n", |
| 158 | localization, screen_index, offset)); |
| 159 | layout = (ScreenLayout*)(bmpfv + offset); |
| 160 | |
| 161 | /* Display all bitmaps for the image */ |
| 162 | for (i = 0; i < MAX_IMAGE_IN_LAYOUT; i++) { |
| 163 | if (layout->images[i].image_info_offset) { |
| 164 | offset = layout->images[i].image_info_offset; |
| 165 | image_info = (ImageInfo*)(bmpfv + offset); |
| 166 | VBDEBUG(("VbDisplayScreenFromGBB: image %d: %dx%d+%d+%d %d/%d" |
| 167 | "tag %d at 0x%x\n", |
| 168 | i, image_info->width, image_info->height, |
| 169 | layout->images[i].x, layout->images[i].y, |
| 170 | image_info->compressed_size, image_info->original_size, |
| 171 | image_info->tag, offset)); |
| 172 | |
| 173 | retval = VbExDisplayImage(layout->images[i].x, layout->images[i].y, |
| 174 | image_info, bmpfv + offset + sizeof(ImageInfo)); |
| 175 | if (VBERROR_SUCCESS != retval) |
| 176 | goto VbDisplayScreenFromGBB_exit; |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | /* Successful if all bitmaps displayed */ |
| 181 | retval = VBERROR_SUCCESS; |
| 182 | |
| 183 | VbDisplayScreenFromGBB_exit: |
| 184 | |
| 185 | /* Free the bitmap data copy */ |
| 186 | VbExFree(bmpfv); |
| 187 | return retval; |
| 188 | } |
| 189 | |
| 190 | |
| 191 | /* Display a screen, initializing the display if necessary. If force!=0, |
| 192 | * redisplays the screen even if it's the same as the current screen. */ |
| 193 | static VbError_t VbDisplayScreen(VbCommonParams* cparams, uint32_t screen, |
| 194 | int force) { |
| 195 | |
| 196 | VBDEBUG(("VbDisplayScreen(%d, %d)\n", (int)screen, force)); |
| 197 | |
| 198 | /* Initialize display if necessary */ |
| 199 | if (!disp_width) { |
| 200 | if (VBERROR_SUCCESS != VbExDisplayInit(&disp_width, &disp_height)) |
| 201 | return 1; |
| 202 | } |
| 203 | |
| 204 | /* If the requested screen is the same as the current one, we're done. */ |
| 205 | if (disp_current_screen == screen && 0 == force) |
| 206 | return VBERROR_SUCCESS; |
| 207 | |
| 208 | /* If the screen is blank, turn off the backlight; else turn it on. */ |
| 209 | VbExDisplayBacklight(VB_SCREEN_BLANK == screen ? 0 : 1); |
| 210 | |
| 211 | /* Request the screen */ |
| 212 | disp_current_screen = screen; |
| 213 | |
| 214 | /* Look in the GBB first */ |
| 215 | if (VBERROR_SUCCESS == VbDisplayScreenFromGBB(cparams, screen)) |
| 216 | return VBERROR_SUCCESS; |
| 217 | |
| 218 | /* If the screen wasn't in the GBB bitmaps, fall back to a default screen. */ |
| 219 | return VbExDisplayScreen(screen); |
| 220 | } |
| 221 | |
Randall Spangler | 9619112 | 2011-07-08 14:01:54 -0700 | [diff] [blame^] | 222 | #define DEBUG_INFO_SIZE 512 |
Randall Spangler | 1b1998d | 2011-07-01 16:12:47 -0700 | [diff] [blame] | 223 | |
| 224 | static VbError_t VbCheckDisplayKey(VbCommonParams* cparams, uint32_t key) { |
Randall Spangler | 9619112 | 2011-07-08 14:01:54 -0700 | [diff] [blame^] | 225 | VbSharedDataHeader* shared = (VbSharedDataHeader*)cparams->shared_data_blob; |
| 226 | GoogleBinaryBlockHeader* gbb = (GoogleBinaryBlockHeader*)cparams->gbb_data; |
Randall Spangler | 1b1998d | 2011-07-01 16:12:47 -0700 | [diff] [blame] | 227 | |
| 228 | if ('\t' == key) { |
| 229 | /* Tab = display debug info */ |
Randall Spangler | 9619112 | 2011-07-08 14:01:54 -0700 | [diff] [blame^] | 230 | char buf[DEBUG_INFO_SIZE] = ""; |
| 231 | uint32_t used = 0; |
| 232 | uint32_t i; |
Randall Spangler | 1b1998d | 2011-07-01 16:12:47 -0700 | [diff] [blame] | 233 | |
| 234 | /* Redisplay the current screen, to overwrite any previous debug output */ |
| 235 | VbDisplayScreen(cparams, disp_current_screen, 1); |
| 236 | |
Randall Spangler | 9619112 | 2011-07-08 14:01:54 -0700 | [diff] [blame^] | 237 | /* Add hardware ID */ |
| 238 | used += Strncat(buf + used, "HWID: ", DEBUG_INFO_SIZE - used); |
| 239 | if (0 == gbb->hwid_size || |
| 240 | gbb->hwid_offset > cparams->gbb_size || |
| 241 | gbb->hwid_offset + gbb->hwid_size > cparams->gbb_size) { |
| 242 | VBDEBUG(("VbCheckDisplayKey(): invalid hwid offset/size\n")); |
| 243 | used += Strncat(buf + used, "(INVALID)", DEBUG_INFO_SIZE - used); |
| 244 | } else { |
| 245 | used += Strncat(buf + used, (char*)((uint8_t*)gbb + gbb->hwid_offset), |
| 246 | DEBUG_INFO_SIZE - used); |
| 247 | } |
| 248 | |
| 249 | /* Add recovery request */ |
| 250 | used += Strncat(buf + used, "\nrecovery_request: 0x", |
| 251 | DEBUG_INFO_SIZE - used); |
| 252 | used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used, |
| 253 | shared->recovery_reason, 16, 2); |
| 254 | |
| 255 | /* Add VbSharedData flags */ |
| 256 | used += Strncat(buf + used, "\nVbSD.flags: 0x", DEBUG_INFO_SIZE - used); |
| 257 | used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used, |
| 258 | shared->flags, 16, 8); |
| 259 | |
| 260 | /* Add raw contents of VbNvStorage */ |
| 261 | used += Strncat(buf + used, "\nVbNv.raw:", DEBUG_INFO_SIZE - used); |
| 262 | for (i = 0; i < VBNV_BLOCK_SIZE; i++) { |
| 263 | used += Strncat(buf + used, " ", DEBUG_INFO_SIZE - used); |
| 264 | used += Uint64ToString(buf + used, DEBUG_INFO_SIZE - used, |
| 265 | vnc.raw[i], 16, 2); |
| 266 | } |
| 267 | |
| 268 | used += Strncat(buf + used, "\n", DEBUG_INFO_SIZE - used); |
| 269 | |
| 270 | /* TODO: add more interesting data: |
| 271 | * - TPM firmware and kernel versions. In the current code, they're |
| 272 | * only filled into VbSharedData by LoadFirmware() and LoadKernel(), and |
| 273 | * since neither of those is called in the recovery path this isn't |
| 274 | * feasible yet. |
| 275 | * - SHA1 of kernel subkey (assuming we always set it in VbSelectFirmware, |
| 276 | * even in recovery mode, where we just copy it from the root key) |
Randall Spangler | 1b1998d | 2011-07-01 16:12:47 -0700 | [diff] [blame] | 277 | * - Information on current disks |
Randall Spangler | 9619112 | 2011-07-08 14:01:54 -0700 | [diff] [blame^] | 278 | * - Anything else interesting from VbNvStorage */ |
| 279 | |
| 280 | buf[DEBUG_INFO_SIZE - 1] = '\0'; |
| 281 | VBDEBUG(("VbCheckDisplayKey() wants to show '%s'\n", buf)); |
| 282 | return VbExDisplayDebugInfo(buf); |
Randall Spangler | 1b1998d | 2011-07-01 16:12:47 -0700 | [diff] [blame] | 283 | |
| 284 | } else if (VB_KEY_LEFT == key || VB_KEY_RIGHT == key) { |
| 285 | /* Arrow keys = change localization */ |
| 286 | uint32_t loc = 0; |
| 287 | uint32_t count = 0; |
| 288 | |
| 289 | /* Get localization count */ |
| 290 | VbGetLocalizationCount(cparams, &count); |
| 291 | |
| 292 | /* Change localization */ |
| 293 | VbNvSetup(&vnc); |
| 294 | VbNvGet(&vnc, VBNV_LOCALIZATION_INDEX, &loc); |
| 295 | if (VB_KEY_RIGHT == key) |
| 296 | loc = (loc < count - 1 ? loc + 1 : 0); |
| 297 | else |
| 298 | loc = (loc > 0 ? loc - 1 : count - 1); |
| 299 | VBDEBUG(("VbCheckDisplayKey() - change localization to %d\n", (int)loc)); |
| 300 | VbNvSet(&vnc, VBNV_LOCALIZATION_INDEX, loc); |
| 301 | VbNvTeardown(&vnc); |
| 302 | if (vnc.raw_changed) |
| 303 | VbExNvStorageWrite(vnc.raw); |
| 304 | |
| 305 | /* Force redraw of current screen */ |
| 306 | return VbDisplayScreen(cparams, disp_current_screen, 1); |
| 307 | } |
| 308 | |
| 309 | return VBERROR_SUCCESS; |
| 310 | } |
| 311 | |
| 312 | |
| 313 | /* Return codes fof VbTryLoadKernel, in addition to VBERROR_SUCCESS */ |
| 314 | enum VbTryLoadKernelError_t { |
| 315 | /* No disks found */ |
| 316 | VBERROR_TRY_LOAD_NO_DISKS = 1, |
| 317 | /* Need to reboot to same mode/recovery reason as this boot */ |
| 318 | VBERROR_TRY_LOAD_REBOOT = 2, |
| 319 | /* Some other error; go to recovery mode if this was the only hope to boot */ |
| 320 | VBERROR_TRY_LOAD_RECOVERY = 3, |
| 321 | }; |
| 322 | |
| 323 | |
| 324 | /* Attempt loading a kernel from the specified type(s) of disks. If |
| 325 | * successful, sets p->disk_handle to the disk for the kernel. See |
| 326 | * VBERROR_TRY_LOAD_* for additional return codes. */ |
| 327 | uint32_t VbTryLoadKernel(VbCommonParams* cparams, LoadKernelParams* p, |
| 328 | uint32_t get_info_flags) { |
| 329 | VbSharedDataHeader* shared = (VbSharedDataHeader*)cparams->shared_data_blob; |
| 330 | int retval = VBERROR_TRY_LOAD_NO_DISKS; |
| 331 | VbDiskInfo* disk_info = NULL; |
| 332 | uint32_t disk_count = 0; |
| 333 | uint32_t i; |
| 334 | |
| 335 | VBDEBUG(("VbTryLoadKernel() start, get_info_flags=0x%x\n", |
| 336 | (int)get_info_flags)); |
| 337 | |
| 338 | p->disk_handle = NULL; |
| 339 | |
| 340 | /* Find disks */ |
| 341 | if (VBERROR_SUCCESS != VbExDiskGetInfo(&disk_info, &disk_count, |
| 342 | get_info_flags)) |
| 343 | disk_count = 0; |
| 344 | |
| 345 | VBDEBUG(("VbTryLoadKernel() found %d disks\n", (int)disk_count)); |
| 346 | if (0 == disk_count) { |
| 347 | VbSetRecoveryRequest(VBNV_RECOVERY_RW_NO_DISK); |
| 348 | return VBERROR_TRY_LOAD_NO_DISKS; |
| 349 | } |
| 350 | |
| 351 | /* Loop over disks */ |
| 352 | for (i = 0; i < disk_count; i++) { |
| 353 | VBDEBUG(("VbTryLoadKernel() trying disk %d\n", (int)i)); |
| 354 | p->disk_handle = disk_info[i].handle; |
| 355 | p->bytes_per_lba = disk_info[i].bytes_per_lba; |
| 356 | p->ending_lba = disk_info[i].lba_count - 1; |
| 357 | retval = LoadKernel(p); |
| 358 | VBDEBUG(("VbTryLoadKernel() LoadKernel() returned %d\n", retval)); |
| 359 | |
| 360 | /* Stop now if we found a kernel or we need to reboot */ |
| 361 | /* TODO: If recovery requested, should track the farthest we get, instead |
| 362 | * of just returning the value from the last disk attempted. */ |
| 363 | if (LOAD_KERNEL_SUCCESS == retval || LOAD_KERNEL_REBOOT == retval) |
| 364 | break; |
| 365 | } |
| 366 | |
| 367 | /* If we didn't succeed, don't return a disk handle */ |
| 368 | if (LOAD_KERNEL_SUCCESS != retval) |
| 369 | p->disk_handle = NULL; |
| 370 | |
| 371 | VbExDiskFreeInfo(disk_info, p->disk_handle); |
| 372 | |
| 373 | /* Translate return codes */ |
| 374 | switch (retval) { |
| 375 | case LOAD_KERNEL_SUCCESS: |
| 376 | return VBERROR_SUCCESS; |
| 377 | case LOAD_KERNEL_REBOOT: |
| 378 | /* Reboot to same mode, so reuse the current recovery reason */ |
| 379 | VbSetRecoveryRequest(shared->recovery_reason); |
| 380 | return VBERROR_TRY_LOAD_REBOOT; |
| 381 | case LOAD_KERNEL_NOT_FOUND: |
| 382 | VbSetRecoveryRequest(VBNV_RECOVERY_RW_NO_OS); |
| 383 | return VBERROR_TRY_LOAD_RECOVERY; |
| 384 | case LOAD_KERNEL_INVALID: |
| 385 | VbSetRecoveryRequest(VBNV_RECOVERY_RW_INVALID_OS); |
| 386 | return VBERROR_TRY_LOAD_RECOVERY; |
| 387 | case LOAD_KERNEL_RECOVERY: |
| 388 | return VBERROR_TRY_LOAD_RECOVERY; |
| 389 | default: |
| 390 | VbSetRecoveryRequest(VBNV_RECOVERY_RW_UNSPECIFIED); |
| 391 | return VBERROR_TRY_LOAD_RECOVERY; |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | |
| 396 | /* Handle a normal boot from fixed drive only. */ |
| 397 | VbError_t VbBootNormal(VbCommonParams* cparams, LoadKernelParams* p) { |
| 398 | return VbTryLoadKernel(cparams, p, VB_DISK_FLAG_FIXED); |
| 399 | } |
| 400 | |
| 401 | |
| 402 | #ifdef BUILD_FVDEVELOPER |
| 403 | /* Developer mode delays. All must be multiples of DEV_DELAY_INCREMENT */ |
| 404 | #define DEV_DELAY_INCREMENT 250 /* Delay each loop, in msec */ |
| 405 | #define DEV_DELAY_BEEP1 20000 /* Beep for first time at this time */ |
| 406 | #define DEV_DELAY_BEEP2 21000 /* Beep for second time at this time */ |
| 407 | #define DEV_DELAY_TIMEOUT 30000 /* Give up at this time */ |
| 408 | |
| 409 | /* Handle a developer-mode boot */ |
| 410 | VbError_t VbBootDeveloper(VbCommonParams* cparams, LoadKernelParams* p) { |
| 411 | uint32_t delay_time = 0; |
| 412 | |
| 413 | /* Show the dev mode warning screen */ |
| 414 | VbDisplayScreen(cparams, VB_SCREEN_DEVELOPER_WARNING, 0); |
| 415 | |
| 416 | /* Loop for dev mode warning delay */ |
| 417 | for (delay_time = 0; delay_time < DEV_DELAY_TIMEOUT; |
| 418 | delay_time += DEV_DELAY_INCREMENT) { |
| 419 | uint32_t key; |
| 420 | |
| 421 | if (VbExIsShutdownRequested()) |
| 422 | return 1; |
| 423 | |
| 424 | if (DEV_DELAY_BEEP1 == delay_time || DEV_DELAY_BEEP2 == delay_time) |
| 425 | VbExBeep(DEV_DELAY_INCREMENT, 400); |
| 426 | else |
| 427 | VbExSleepMs(DEV_DELAY_INCREMENT); |
| 428 | |
| 429 | /* Handle keypress */ |
| 430 | key = VbExKeyboardRead(); |
| 431 | switch (key) { |
| 432 | case '\r': |
| 433 | case ' ': |
| 434 | case 0x1B: |
| 435 | /* Enter, space, or ESC = reboot to recovery */ |
| 436 | VBDEBUG(("VbBootDeveloper() - user pressed ENTER/SPACE/ESC")); |
| 437 | VbSetRecoveryRequest(VBNV_RECOVERY_RW_DEV_SCREEN); |
| 438 | return 1; |
| 439 | case 0x04: |
| 440 | /* Ctrl+D = dismiss warning; advance to timeout */ |
| 441 | VBDEBUG(("VbBootDeveloper() - user pressed Ctrl+D; skip delay\n")); |
| 442 | delay_time = DEV_DELAY_TIMEOUT; |
| 443 | break; |
| 444 | case 0x15: |
| 445 | /* Ctrl+U = try USB boot, or beep if failure */ |
| 446 | VBDEBUG(("VbBootDeveloper() - user pressed Ctrl+U; try USB\n")); |
| 447 | if (VBERROR_SUCCESS == VbTryLoadKernel(cparams, p, |
| 448 | VB_DISK_FLAG_REMOVABLE)) { |
| 449 | VBDEBUG(("VbBootDeveloper() - booting USB\n")); |
| 450 | return VBERROR_SUCCESS; |
| 451 | } else { |
| 452 | VBDEBUG(("VbBootDeveloper() - no kernel found on USB\n")); |
| 453 | VbExBeep(DEV_DELAY_INCREMENT, 400); |
| 454 | } |
| 455 | break; |
| 456 | default: |
| 457 | VbCheckDisplayKey(cparams, key); |
| 458 | break; |
| 459 | /* TODO: xyzzy easter egg check */ |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | /* Timeout or Ctrl+D; attempt loading from fixed disk */ |
| 464 | VBDEBUG(("VbBootDeveloper() - trying fixed disk\n")); |
| 465 | return VbTryLoadKernel(cparams, p, VB_DISK_FLAG_FIXED); |
| 466 | } |
| 467 | |
| 468 | #endif /* BUILD_FVDEVELOPER */ |
| 469 | |
| 470 | |
| 471 | /* Delay between disk checks in recovery mode */ |
| 472 | #define REC_DELAY_INCREMENT 250 |
| 473 | |
| 474 | /* Handle a recovery-mode boot */ |
| 475 | VbError_t VbBootRecovery(VbCommonParams* cparams, LoadKernelParams* p) { |
| 476 | VbSharedDataHeader* shared = (VbSharedDataHeader*)cparams->shared_data_blob; |
| 477 | uint32_t retval; |
| 478 | int i; |
| 479 | |
| 480 | VBDEBUG(("VbBootRecovery() start\n")); |
| 481 | |
| 482 | /* If dev mode switch is off, require removal of all external media. */ |
| 483 | if (!(shared->flags & VBSD_BOOT_DEV_SWITCH_ON)) { |
| 484 | VbDiskInfo* disk_info = NULL; |
| 485 | uint32_t disk_count = 0; |
| 486 | |
| 487 | VBDEBUG(("VbBootRecovery() forcing device removal\n")); |
| 488 | |
| 489 | while (1) { |
| 490 | if (VBERROR_SUCCESS != VbExDiskGetInfo(&disk_info, &disk_count, |
| 491 | VB_DISK_FLAG_REMOVABLE)) |
| 492 | disk_count = 0; |
| 493 | VbExDiskFreeInfo(disk_info, NULL); |
| 494 | |
| 495 | if (0 == disk_count) { |
| 496 | VbDisplayScreen(cparams, VB_SCREEN_BLANK, 0); |
| 497 | break; |
| 498 | } |
| 499 | |
| 500 | VBDEBUG(("VbBootRecovery() waiting for %d disks to be removed\n", |
| 501 | (int)disk_count)); |
| 502 | |
| 503 | VbDisplayScreen(cparams, VB_SCREEN_RECOVERY_REMOVE, 0); |
| 504 | |
| 505 | /* Scan keyboard more frequently than media, since x86 platforms |
| 506 | * don't like to scan USB too rapidly. */ |
| 507 | for (i = 0; i < 4; i++) { |
| 508 | VbCheckDisplayKey(cparams, VbExKeyboardRead()); |
| 509 | if (VbExIsShutdownRequested()) |
| 510 | return 1; |
| 511 | VbExSleepMs(REC_DELAY_INCREMENT); |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | /* Loop and wait for a recovery image */ |
| 517 | while (1) { |
| 518 | VBDEBUG(("VbBootRecovery() attempting to load kernel\n")); |
| 519 | retval = VbTryLoadKernel(cparams, p, VB_DISK_FLAG_REMOVABLE); |
| 520 | |
| 521 | if (VBERROR_SUCCESS == retval) |
| 522 | break; /* Found a recovery kernel */ |
| 523 | else if (VBERROR_TRY_LOAD_REBOOT == retval) |
| 524 | return 1; /* Must reboot (back into recovery mode) */ |
| 525 | |
| 526 | VbDisplayScreen(cparams, VBERROR_TRY_LOAD_NO_DISKS == retval ? |
| 527 | VB_SCREEN_RECOVERY_INSERT : VB_SCREEN_RECOVERY_NO_GOOD, 0); |
| 528 | |
| 529 | /* Scan keyboard more frequently than media, since x86 platforms don't like |
| 530 | * to scan USB too rapidly. */ |
| 531 | for (i = 0; i < 4; i++) { |
| 532 | VbCheckDisplayKey(cparams, VbExKeyboardRead()); |
| 533 | if (VbExIsShutdownRequested()) |
| 534 | return 1; |
| 535 | VbExSleepMs(REC_DELAY_INCREMENT); |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | return VBERROR_SUCCESS; |
| 540 | } |
| 541 | |
| 542 | |
| 543 | VbError_t VbSelectAndLoadKernel(VbCommonParams* cparams, |
| 544 | VbSelectAndLoadKernelParams* kparams) { |
| 545 | VbSharedDataHeader* shared = (VbSharedDataHeader*)cparams->shared_data_blob; |
| 546 | VbError_t retval; |
| 547 | LoadKernelParams p; |
| 548 | |
| 549 | VBDEBUG(("VbSelectAndLoadKernel() start\n")); |
| 550 | |
Randall Spangler | 9619112 | 2011-07-08 14:01:54 -0700 | [diff] [blame^] | 551 | /* Start timer */ |
| 552 | shared->timer_vb_select_and_load_kernel_enter = VbExGetTimer(); |
| 553 | |
Randall Spangler | 1b1998d | 2011-07-01 16:12:47 -0700 | [diff] [blame] | 554 | VbExNvStorageRead(vnc.raw); |
| 555 | vnc.raw_changed = 0; |
| 556 | |
| 557 | /* Clear output params in case we fail */ |
| 558 | kparams->disk_handle = NULL; |
| 559 | kparams->partition_number = 0; |
| 560 | kparams->bootloader_address = 0; |
| 561 | kparams->bootloader_size = 0; |
| 562 | Memset(kparams->partition_guid, 0, sizeof(kparams->partition_guid)); |
| 563 | |
| 564 | /* Fill in params for calls to LoadKernel() */ |
| 565 | p.shared_data_blob = cparams->shared_data_blob; |
| 566 | p.shared_data_size = cparams->shared_data_size; |
| 567 | p.gbb_data = cparams->gbb_data; |
| 568 | p.gbb_size = cparams->gbb_size; |
| 569 | p.kernel_buffer = kparams->kernel_buffer; |
| 570 | p.kernel_buffer_size = kparams->kernel_buffer_size; |
| 571 | p.nv_context = &vnc; |
| 572 | p.boot_flags = 0; |
| 573 | if (shared->flags & VBSD_BOOT_DEV_SWITCH_ON) |
| 574 | p.boot_flags |= BOOT_FLAG_DEVELOPER; |
| 575 | |
| 576 | /* Select boot path */ |
| 577 | if (shared->recovery_reason) { |
| 578 | /* Recovery boot */ |
| 579 | p.boot_flags |= BOOT_FLAG_RECOVERY; |
| 580 | retval = VbBootRecovery(cparams, &p); |
| 581 | VbDisplayScreen(cparams, VB_SCREEN_BLANK, 0); |
| 582 | } else { |
| 583 | /* TODO: vboot compiler define for developer mode; this is the H2C one */ |
| 584 | #ifdef BUILD_FVDEVELOPER |
| 585 | /* Developer boot */ |
| 586 | p.boot_flags |= BOOT_FLAG_DEV_FIRMWARE; |
| 587 | retval = VbBootDeveloper(cparams, &p); |
| 588 | VbDisplayScreen(cparams, VB_SCREEN_BLANK, 0); |
| 589 | #else |
| 590 | /* Normal boot */ |
| 591 | retval = VbBootNormal(cparams, &p); |
| 592 | #endif |
| 593 | } |
| 594 | |
| 595 | if (VBERROR_SUCCESS == retval) { |
| 596 | /* Save disk parameters */ |
| 597 | kparams->disk_handle = p.disk_handle; |
| 598 | kparams->partition_number = (uint32_t)p.partition_number; |
| 599 | kparams->bootloader_address = p.bootloader_address; |
| 600 | kparams->bootloader_size = (uint32_t)p.bootloader_size; |
| 601 | Memcpy(kparams->partition_guid, p.partition_guid, |
| 602 | sizeof(kparams->partition_guid)); |
| 603 | |
| 604 | /* Since we did find something to boot, clear recovery request, if any, |
| 605 | * resulting from disk checks during developer or recovery mode. */ |
| 606 | VbSetRecoveryRequest(VBNV_RECOVERY_NOT_REQUESTED); |
| 607 | } |
| 608 | |
| 609 | if (vnc.raw_changed) |
| 610 | VbExNvStorageWrite(vnc.raw); |
| 611 | |
Randall Spangler | 9619112 | 2011-07-08 14:01:54 -0700 | [diff] [blame^] | 612 | /* Stop timer */ |
| 613 | shared->timer_vb_select_and_load_kernel_exit = VbExGetTimer(); |
| 614 | |
Randall Spangler | 1b1998d | 2011-07-01 16:12:47 -0700 | [diff] [blame] | 615 | VBDEBUG(("VbSelectAndLoadKernel() returning %d\n", (int)retval)); |
| 616 | |
| 617 | /* Pass through return value from boot path */ |
| 618 | return retval; |
| 619 | } |