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
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/* 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.
*/
/* Flash memory module for stm32f4 */
#include "clock.h"
#include "compile_time_macros.h"
#include "console.h"
#include "common.h"
#include "flash.h"
#include "hooks.h"
#include "registers.h"
#include "system.h"
#include "util.h"
/*****************************************************************************/
/* Physical layer APIs */
/*
* 8 "erase" sectors : 16KB/16KB/16KB/16KB/64KB/128KB/128KB/128KB
*/
struct ec_flash_bank const flash_bank_array[] = {
{
.count = 4,
.size_exp = __fls(SIZE_16KB),
.write_size_exp = __fls(CONFIG_FLASH_WRITE_SIZE),
.erase_size_exp = __fls(SIZE_16KB),
.protect_size_exp = __fls(SIZE_16KB),
},
{
.count = 1,
.size_exp = __fls(SIZE_64KB),
.write_size_exp = __fls(CONFIG_FLASH_WRITE_SIZE),
.erase_size_exp = __fls(SIZE_64KB),
.protect_size_exp = __fls(SIZE_64KB),
},
{
.count = (CONFIG_FLASH_SIZE - SIZE_128KB) / SIZE_128KB,
.write_size_exp = __fls(CONFIG_FLASH_WRITE_SIZE),
.size_exp = __fls(SIZE_128KB),
.erase_size_exp = __fls(SIZE_128KB),
.protect_size_exp = __fls(SIZE_128KB),
},
};
/*****************************************************************************/
/* Physical layer APIs */
int flash_physical_get_protect(int bank)
{
return !(STM32_OPTB_WP & STM32_OPTB_nWRP(bank));
}
uint32_t flash_physical_get_protect_flags(void)
{
uint32_t flags = 0;
if ((STM32_OPTB_WP & STM32_OPTB_nWRP_ALL) == 0)
flags |= EC_FLASH_PROTECT_ALL_NOW;
return flags;
}
uint32_t flash_physical_get_valid_flags(void)
{
return EC_FLASH_PROTECT_RO_AT_BOOT |
EC_FLASH_PROTECT_RO_NOW |
EC_FLASH_PROTECT_ALL_NOW;
}
uint32_t flash_physical_get_writable_flags(uint32_t cur_flags)
{
uint32_t ret = 0;
/* If RO protection isn't enabled, its at-boot state can be changed. */
if (!(cur_flags & EC_FLASH_PROTECT_RO_NOW))
ret |= EC_FLASH_PROTECT_RO_AT_BOOT;
/*
* If entire flash isn't protected at this boot, it can be enabled if
* the WP GPIO is asserted.
*/
if (!(cur_flags & EC_FLASH_PROTECT_ALL_NOW) &&
(cur_flags & EC_FLASH_PROTECT_GPIO_ASSERTED))
ret |= EC_FLASH_PROTECT_ALL_NOW;
return ret;
}
int flash_physical_restore_state(void)
{
return 0;
}
|
