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c324fbfb6d
Change-Id: I879c18cc139f8a02bcaa6eb80437eaf836a5e851 BUG=chrome-os-partner:2597 TEST=manual install pvt-signed image flip dev switch on and boot install dev-signed firmware reboot reboot sudo bash stop tcsd tpmc read 0x1008 0x0d bytes 6-10 should be 1 0 1 0, not FF FF FF FF Review URL: http://codereview.chromium.org/6626020
123 lines
3.9 KiB
C
123 lines
3.9 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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#ifndef VBOOT_REFERENCE_CGPTLIB_INTERNAL_H_
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#define VBOOT_REFERENCE_CGPTLIB_INTERNAL_H_
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#include "sysincludes.h"
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#include "cgptlib.h"
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#include "gpt.h"
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/* If gpt->current_kernel is this value, means either:
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* 1. an initial value before scanning GPT entries,
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* 2. after scanning, no any valid kernel is found.
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*/
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#define CGPT_KERNEL_ENTRY_NOT_FOUND (-1)
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/* Bit definitions and masks for GPT attributes.
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*
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* 63-61 -- (reserved)
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* 60 -- read-only
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* 59-57 -- (reserved)
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* 56 -- success
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* 55-52 -- tries
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* 51-48 -- priority
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* 47-2 -- UEFI: reserved for future use
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* 1 -- UEFI: partition is not mapped
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* 0 -- UEFI: partition is required
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*/
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#define CGPT_ATTRIBUTE_SUCCESSFUL_OFFSET (56 - 48)
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#define CGPT_ATTRIBUTE_MAX_SUCCESSFUL (1ULL)
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#define CGPT_ATTRIBUTE_SUCCESSFUL_MASK (CGPT_ATTRIBUTE_MAX_SUCCESSFUL << \
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CGPT_ATTRIBUTE_SUCCESSFUL_OFFSET)
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#define CGPT_ATTRIBUTE_TRIES_OFFSET (52 - 48)
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#define CGPT_ATTRIBUTE_MAX_TRIES (15ULL)
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#define CGPT_ATTRIBUTE_TRIES_MASK (CGPT_ATTRIBUTE_MAX_TRIES << \
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CGPT_ATTRIBUTE_TRIES_OFFSET)
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#define CGPT_ATTRIBUTE_PRIORITY_OFFSET (48 - 48)
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#define CGPT_ATTRIBUTE_MAX_PRIORITY (15ULL)
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#define CGPT_ATTRIBUTE_PRIORITY_MASK (CGPT_ATTRIBUTE_MAX_PRIORITY << \
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CGPT_ATTRIBUTE_PRIORITY_OFFSET)
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/* Defines ChromeOS-specific limitation on GPT */
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#define MIN_SIZE_OF_HEADER 92
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#define MAX_SIZE_OF_HEADER 512
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#define MIN_SIZE_OF_ENTRY 128
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#define MAX_SIZE_OF_ENTRY 512
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#define SIZE_OF_ENTRY_MULTIPLE 8
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#define MIN_NUMBER_OF_ENTRIES 32
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#define MAX_NUMBER_OF_ENTRIES 512
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/* Defines GPT sizes */
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#define GPT_PMBR_SECTOR 1 /* size (in sectors) of PMBR */
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#define GPT_HEADER_SECTOR 1
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#define GPT_ENTRIES_SECTORS 32 /* assume sector size if 512 bytes, then
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* (TOTAL_ENTRIES_SIZE / 512) = 32 */
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/* alias name of index in internal array for primary and secondary header and
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* entries. */
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enum {
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/* constants for index */
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PRIMARY = 0,
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SECONDARY = 1,
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ANY_VALID = 9999, /* accept any between primary and secondary */
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/* constants for bit mask */
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MASK_NONE = 0,
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MASK_PRIMARY = 1,
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MASK_SECONDARY = 2,
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MASK_BOTH = 3,
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};
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/* Verify GptData parameters are sane. */
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int CheckParameters(GptData* gpt);
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/* Check header fields.
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*
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* Returns 0 if header is valid, 1 if invalid. */
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int CheckHeader(GptHeader* h, int is_secondary, uint64_t drive_sectors);
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/* Calculate and return the header CRC. */
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uint32_t HeaderCrc(GptHeader* h);
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/* Check entries.
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*
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* Returns 0 if entries are valid, 1 if invalid. */
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int CheckEntries(GptEntry* entries, GptHeader* h);
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/* Check GptData, headers, entries.
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*
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* If successful, sets gpt->valid_headers and gpt->valid_entries and returns
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* GPT_SUCCESS.
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*
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* On error, returns a GPT_ERROR_* return code. */
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int GptSanityCheck(GptData* gpt);
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/* Repairs GPT data by copying from one set of valid headers/entries to the
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* other. Assumes GptSanityCheck() has been run to determine which headers
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* and/or entries are already valid. */
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void GptRepair(GptData* gpt);
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/* Getters and setters for partition attribute fields. */
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int GetEntrySuccessful(const GptEntry* e);
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int GetEntryPriority(const GptEntry* e);
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int GetEntryTries(const GptEntry* e);
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void SetEntrySuccessful(GptEntry* e, int successful);
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void SetEntryPriority(GptEntry* e, int priority);
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void SetEntryTries(GptEntry* e, int tries);
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/* Return 1 if the entry is unused, 0 if it is used. */
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int IsUnusedEntry(const GptEntry* e);
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/* Returns 1 if the entry is a Chrome OS kernel partition, else 0. */
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int IsKernelEntry(const GptEntry* e);
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/* Copies the current kernel partition's UniquePartitionGuid to the dest */
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void GetCurrentKernelUniqueGuid(GptData *gpt, void *dest);
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#endif /* VBOOT_REFERENCE_CGPTLIB_INTERNAL_H_ */
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