Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
Aaron Durbin | c6588c5 | 2015-05-15 13:15:34 -0500 | [diff] [blame] | 4 | * Copyright 2015 Google Inc. |
Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 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. |
Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 14 | */ |
| 15 | |
Aaron Durbin | c6588c5 | 2015-05-15 13:15:34 -0500 | [diff] [blame] | 16 | #include <boot_device.h> |
Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 17 | |
Aaron Durbin | c6588c5 | 2015-05-15 13:15:34 -0500 | [diff] [blame] | 18 | void __attribute__((weak)) boot_device_init(void) |
Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 19 | { |
Aaron Durbin | c6588c5 | 2015-05-15 13:15:34 -0500 | [diff] [blame] | 20 | /* Provide weak do-nothing init. */ |
| 21 | } |
| 22 | |
| 23 | int boot_device_ro_subregion(const struct region *sub, |
| 24 | struct region_device *subrd) |
| 25 | { |
| 26 | const struct region_device *boot_dev; |
| 27 | |
Aaron Durbin | aeb2e15 | 2015-10-13 14:26:55 -0500 | [diff] [blame] | 28 | /* Ensure boot device has been initialized at least once. */ |
| 29 | boot_device_init(); |
| 30 | |
Aaron Durbin | c6588c5 | 2015-05-15 13:15:34 -0500 | [diff] [blame] | 31 | boot_dev = boot_device_ro(); |
| 32 | |
| 33 | if (boot_dev == NULL) |
| 34 | return -1; |
| 35 | |
| 36 | return rdev_chain(subrd, boot_dev, region_offset(sub), region_sz(sub)); |
Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 37 | } |