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. |
| 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 |
Patrick Georgi | b890a12 | 2015-03-26 15:17:45 +0100 | [diff] [blame] | 17 | * Foundation, Inc. |
Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 18 | */ |
| 19 | |
Aaron Durbin | c6588c5 | 2015-05-15 13:15:34 -0500 | [diff] [blame] | 20 | #include <boot_device.h> |
Aaron Durbin | 899d13d | 2015-05-15 23:39:23 -0500 | [diff] [blame] | 21 | #include <console/console.h> |
| 22 | #include <cbfs.h> |
| 23 | #include <endian.h> |
| 24 | #include <stdlib.h> |
Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 25 | |
Aaron Durbin | c6588c5 | 2015-05-15 13:15:34 -0500 | [diff] [blame] | 26 | /* The ROM is memory mapped just below 4GiB. Form a pointer for the base. */ |
| 27 | #define rom_base ((void *)(uintptr_t)(-(int32_t)CONFIG_ROM_SIZE)) |
Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 28 | |
Aaron Durbin | c6588c5 | 2015-05-15 13:15:34 -0500 | [diff] [blame] | 29 | static const struct mem_region_device boot_dev = |
| 30 | MEM_REGION_DEV_INIT(rom_base, CONFIG_ROM_SIZE); |
| 31 | |
| 32 | const struct region_device *boot_device_ro(void) |
Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 33 | { |
Aaron Durbin | c6588c5 | 2015-05-15 13:15:34 -0500 | [diff] [blame] | 34 | return &boot_dev.rdev; |
Gabe Black | 396b072 | 2013-09-26 16:22:09 -0700 | [diff] [blame] | 35 | } |
Aaron Durbin | 899d13d | 2015-05-15 23:39:23 -0500 | [diff] [blame] | 36 | |
| 37 | int cbfs_boot_region_properties(struct cbfs_props *props) |
| 38 | { |
| 39 | struct cbfs_header header; |
| 40 | int32_t offset; |
| 41 | const struct region_device *bdev; |
| 42 | |
| 43 | bdev = boot_device_ro(); |
| 44 | |
| 45 | rdev_readat(bdev, &offset, CONFIG_ROM_SIZE - sizeof(offset), |
| 46 | sizeof(offset)); |
| 47 | |
| 48 | /* The offset is relative to the end of the media. */ |
| 49 | offset += CONFIG_ROM_SIZE; |
| 50 | |
| 51 | rdev_readat(bdev, &header , offset, sizeof(header)); |
| 52 | |
| 53 | header.magic = ntohl(header.magic); |
| 54 | header.romsize = ntohl(header.romsize); |
| 55 | header.bootblocksize = ntohl(header.bootblocksize); |
Aaron Durbin | 899d13d | 2015-05-15 23:39:23 -0500 | [diff] [blame] | 56 | header.offset = ntohl(header.offset); |
| 57 | |
| 58 | if (header.magic != CBFS_HEADER_MAGIC) |
| 59 | return -1; |
| 60 | |
Aaron Durbin | 899d13d | 2015-05-15 23:39:23 -0500 | [diff] [blame] | 61 | props->offset = header.offset; |
| 62 | if (CONFIG_ROM_SIZE != header.romsize) |
| 63 | props->size = CONFIG_ROM_SIZE; |
| 64 | else |
| 65 | props->size = header.romsize; |
| 66 | props->size -= props->offset; |
| 67 | props->size -= header.bootblocksize; |
Patrick Georgi | 4d3e4c4 | 2015-07-14 22:28:27 +0200 | [diff] [blame^] | 68 | props->size = ALIGN_DOWN(props->size, 64); |
Aaron Durbin | 899d13d | 2015-05-15 23:39:23 -0500 | [diff] [blame] | 69 | |
| 70 | printk(BIOS_DEBUG, "CBFS @ %zx size %zx\n", props->offset, props->size); |
| 71 | |
| 72 | return 0; |
| 73 | } |