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93cf15e9a1
This change teaches cgpt a new GUID type to be used for the Chrome OS read/write firmware. The GUID is CAB6E88E-ABF3-4102-A07A-D4BB9BE3C1D3. BUG=chrome-os-partner:4843 TEST=Built and installed on my host, used a separate change to repurpose partition 11 for the R/W firmware using cgpt and the "firmware" type, inspected the image using cgpt. Built and installed an image and used cgpt on the device to inspect it's GPT. Signed-off-by: Gabe Black <gabeblack@google.com> Change-Id: I3b2801b2e1f71b3275bbddbc45fb63bde5bce5a7 Reviewed-on: http://gerrit.chromium.org/gerrit/3763 Reviewed-by: Bill Richardson <wfrichar@chromium.org> Tested-by: Gabe Black <gabeblack@chromium.org>
119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/* Copyright (c) 2010-2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Defines EFI related structure. See more details in EFI 2.3 spec.
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*
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* To download EFI standard, please visit UEFI homepage:
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* http://www.uefi.org/
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*/
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#ifndef VBOOT_REFERENCE_CGPTLIB_GPT_H_
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#define VBOOT_REFERENCE_CGPTLIB_GPT_H_
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#include "sysincludes.h"
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__pragma(pack(push,1)) /* Support packing for MSVC. */
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#define GPT_HEADER_SIGNATURE "EFI PART"
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#define GPT_HEADER_SIGNATURE_SIZE sizeof(GPT_HEADER_SIGNATURE)
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#define GPT_HEADER_REVISION 0x00010000
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/* The first 3 numbers should be stored in network-endian format
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* according to the GUID RFC. The UEFI spec appendix A claims they
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* should be stored in little-endian format. But they need to be
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* _displayed_ in network-endian format, which is also how they're
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* documented in the specs.
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*
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* Since what we have here are little-endian constants, they're
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* byte-swapped from the normal display order. */
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#define GPT_ENT_TYPE_UNUSED \
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{{{0x00000000,0x0000,0x0000,0x00,0x00,{0x00,0x00,0x00,0x00,0x00,0x00}}}}
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#define GPT_ENT_TYPE_EFI \
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{{{0xc12a7328,0xf81f,0x11d2,0xba,0x4b,{0x00,0xa0,0xc9,0x3e,0xc9,0x3b}}}}
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#define GPT_ENT_TYPE_CHROMEOS_FIRMWARE \
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{{{0xcab6e88e,0xabf3,0x4102,0xa0,0x7a,{0xd4,0xbb,0x9b,0xe3,0xc1,0xd3}}}}
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#define GPT_ENT_TYPE_CHROMEOS_KERNEL \
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{{{0xfe3a2a5d,0x4f32,0x41a7,0xb7,0x25,{0xac,0xcc,0x32,0x85,0xa3,0x09}}}}
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#define GPT_ENT_TYPE_CHROMEOS_ROOTFS \
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{{{0x3cb8e202,0x3b7e,0x47dd,0x8a,0x3c,{0x7f,0xf2,0xa1,0x3c,0xfc,0xec}}}}
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#define GPT_ENT_TYPE_CHROMEOS_RESERVED \
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{{{0x2e0a753d,0x9e48,0x43b0,0x83,0x37,{0xb1,0x51,0x92,0xcb,0x1b,0x5e}}}}
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#define GPT_ENT_TYPE_LINUX_DATA \
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{{{0xebd0a0a2,0xb9e5,0x4433,0x87,0xc0,{0x68,0xb6,0xb7,0x26,0x99,0xc7}}}}
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#define UUID_NODE_LEN 6
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#define GUID_SIZE 16
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/* GUID definition.
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* Defined in appendix A of EFI standard.
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*/
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typedef struct {
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union {
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struct {
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uint32_t time_low;
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uint16_t time_mid;
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uint16_t time_high_and_version;
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uint8_t clock_seq_high_and_reserved;
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uint8_t clock_seq_low;
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uint8_t node[UUID_NODE_LEN];
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} Uuid;
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uint8_t raw[GUID_SIZE];
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} u;
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} __attribute__((packed)) Guid;
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#define GUID_EXPECTED_SIZE GUID_SIZE
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/* GPT header defines how many partitions exist on a drive and sectors managed.
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* For every drive device, there are 2 headers, primary and secondary.
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* Most of fields are duplicated except my_lba and entries_lba.
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*
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* You may find more details in chapter 5 of EFI standard.
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*/
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typedef struct {
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char signature[8];
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uint32_t revision;
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uint32_t size;
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uint32_t header_crc32;
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uint32_t reserved_zero;
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uint64_t my_lba;
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uint64_t alternate_lba;
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uint64_t first_usable_lba;
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uint64_t last_usable_lba;
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Guid disk_uuid;
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uint64_t entries_lba;
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uint32_t number_of_entries;
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uint32_t size_of_entry;
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uint32_t entries_crc32;
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/* Remainder of sector is reserved and should be 0 */
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} __attribute__((packed)) GptHeader;
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#define GPTHEADER_EXPECTED_SIZE 92
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/* GPT partition entry defines the starting and ending LBAs of a partition.
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* It also contains the unique GUID, type, and attribute bits.
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*
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* You may find more details in chapter 5 of EFI standard.
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*/
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typedef struct {
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Guid type;
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Guid unique;
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uint64_t starting_lba;
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uint64_t ending_lba;
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union {
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struct {
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uint16_t reserved[3];
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uint16_t gpt_att;
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} __attribute__((packed)) fields;
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uint64_t whole;
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} attrs;
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uint16_t name[36]; /* UTF-16 encoded partition name */
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/* Remainder of entry is reserved and should be 0 */
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} __attribute__((packed)) GptEntry;
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#define GPTENTRY_EXPECTED_SIZE 128
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__pragma(pack(pop)) /* Support packing for MSVC. */
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#endif /* VBOOT_REFERENCE_CGPTLIB_GPT_H_ */
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