42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/*
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* Copyright 2016 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 __EC_CHIP_G_FLASH_INFO_H
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#define __EC_CHIP_G_FLASH_INFO_H
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#include <stddef.h>
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#include "signed_header.h"
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/*
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* Info1 space available to the app firmware is split in four equal size
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* areas, used as follows:
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*
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* Area 0 - RO rollback prevention
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* Area 1 - RW rollback prevention
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* Area 2 - Board specific stuff
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* Area 3 - Crypto scratch
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*/
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#define INFO_AREA_SIZE (INFO_MAX * 4)
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#define INFO_TOTAL_SIZE (INFO_AREA_SIZE * 4)
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#define INFO_RO_MAP_OFFSET 0
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#define INFO_RO_MAP_SIZE INFO_AREA_SIZE
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#define INFO_RW_MAP_OFFSET (INFO_RO_MAP_OFFSET + INFO_RO_MAP_SIZE)
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#define INFO_RW_MAP_SIZE INFO_AREA_SIZE
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#define INFO_BOARD_SPACE_OFFSET (INFO_RW_MAP_OFFSET + INFO_RW_MAP_SIZE)
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/* This in fact enables both read and write. */
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void flash_info_write_enable(void);
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void flash_info_write_disable(void);
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int flash_info_physical_write(int byte_offset, int num_bytes, const char *data);
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int flash_physical_info_read_word(int byte_offset, uint32_t *dst);
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void flash_open_ro_window(uint32_t offset, size_t size_b);
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#endif /* ! __EC_CHIP_G_FLASH_INFO_H */
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