blob: 4267d8c4eab2c43afd0f344682f1723b6474405f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
/*
* Copyright 2016 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef __EC_CHIP_G_FLASH_INFO_H
#define __EC_CHIP_G_FLASH_INFO_H
#include <stddef.h>
#include "signed_header.h"
/*
* Info1 space available to the app firmware is split in four equal size
* areas, used as follows:
*
* Area 0 - RO rollback prevention
* Area 1 - RW rollback prevention
* Area 2 - Board specific stuff
* Area 3 - Crypto scratch
*/
#define INFO_AREA_SIZE (INFO_MAX * 4)
#define INFO_TOTAL_SIZE (INFO_AREA_SIZE * 4)
#define INFO_RO_MAP_OFFSET 0
#define INFO_RO_MAP_SIZE INFO_AREA_SIZE
#define INFO_RW_MAP_OFFSET (INFO_RO_MAP_OFFSET + INFO_RO_MAP_SIZE)
#define INFO_RW_MAP_SIZE INFO_AREA_SIZE
#define INFO_BOARD_SPACE_OFFSET (INFO_RW_MAP_OFFSET + INFO_RW_MAP_SIZE)
/* This in fact enables both read and write. */
void flash_info_write_enable(void);
void flash_info_write_disable(void);
int flash_info_physical_write(int byte_offset, int num_bytes, const char *data);
int flash_physical_info_read_word(int byte_offset, uint32_t *dst);
/* Enable or disable write access to the backup RO section. */
void flash_open_ro_window(uint32_t offset, size_t size_b);
void flash_close_ro_window(void);
#endif /* ! __EC_CHIP_G_FLASH_INFO_H */
|
