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
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/*
* Copyright (c) 2018 Nordic Semiconductor ASA
* Copyright (c) 2015 Runtime Inc
* Copyright (c) 2019-2020 Arm Limited.
*
* SPDX-License-Identifier: Apache-2.0
*/
/*
* Original code taken from mcuboot project at:
* https://github.com/mcu-tools/mcuboot
* Git SHA of the original version: ac55554059147fff718015be9f4bd3108123f50a
*/
#include <errno.h>
#include "target.h"
#include "Driver_Flash.h"
#include "sysflash/sysflash.h"
#include "flash_map/flash_map.h"
#include "flash_map_backend/flash_map_backend.h"
#include "bootutil/bootutil_log.h"
/* Flash device name must be specified by target */
extern ARM_DRIVER_FLASH FLASH_DEV_NAME;
int flash_device_base(uint8_t fd_id, uintptr_t *ret)
{
if (fd_id != FLASH_DEVICE_ID) {
BOOT_LOG_ERR("invalid flash ID %d; expected %d",
fd_id, FLASH_DEVICE_ID);
return -1;
}
*ret = FLASH_DEVICE_BASE;
return 0;
}
/*
* This depends on the mappings defined in flash_map.h.
* MCUBoot uses continuous numbering for the primary slot, the secondary slot,
* and the scratch while TF-M might number it differently.
*/
int flash_area_id_from_multi_image_slot(int image_index, int slot)
{
switch (slot) {
case 0: return FLASH_AREA_IMAGE_PRIMARY(image_index);
case 1: return FLASH_AREA_IMAGE_SECONDARY(image_index);
case 2: return FLASH_AREA_IMAGE_SCRATCH;
}
return -1; /* flash_area_open will fail on that */
}
int flash_area_id_from_image_slot(int slot)
{
return flash_area_id_from_multi_image_slot(0, slot);
}
int flash_area_id_to_multi_image_slot(int image_index, int area_id)
{
if (area_id == FLASH_AREA_IMAGE_PRIMARY(image_index)) {
return 0;
}
if (area_id == FLASH_AREA_IMAGE_SECONDARY(image_index)) {
return 1;
}
BOOT_LOG_ERR("invalid flash area ID");
return -1;
}
int flash_area_id_to_image_slot(int area_id)
{
return flash_area_id_to_multi_image_slot(0, area_id);
}
uint8_t flash_area_erased_val(const struct flash_area *fap)
{
(void)fap;
return FLASH_DEV_NAME.GetInfo()->erased_value;
}
int flash_area_read_is_empty(const struct flash_area *fa, uint32_t off,
void *dst, uint32_t len)
{
uint32_t i;
uint8_t *u8dst;
int rc;
BOOT_LOG_DBG("read_is_empty area=%d, off=%#x, len=%#x",
fa->fa_id, off, len);
rc = FLASH_DEV_NAME.ReadData(fa->fa_off + off, dst, len);
if (rc) {
return -1;
}
u8dst = (uint8_t*)dst;
for (i = 0; i < len; i++) {
if (u8dst[i] != flash_area_erased_val(fa)) {
return 0;
}
}
return 1;
}
|