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f31dac4e IR |
1 | /* |
2 | * Copyright (c) 2017 General Electric Company. All rights reserved. | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
5 | */ | |
6 | ||
7 | #include <bootcount.h> | |
8 | #include <fs.h> | |
9 | #include <mapmem.h> | |
10 | ||
11 | #define BC_MAGIC 0xbc | |
12 | ||
13 | void bootcount_store(ulong a) | |
14 | { | |
15 | u8 *buf; | |
16 | loff_t len; | |
17 | int ret; | |
18 | ||
19 | if (fs_set_blk_dev(CONFIG_SYS_BOOTCOUNT_EXT_INTERFACE, | |
20 | CONFIG_SYS_BOOTCOUNT_EXT_DEVPART, FS_TYPE_EXT)) { | |
21 | puts("Error selecting device\n"); | |
22 | return; | |
23 | } | |
24 | ||
25 | buf = map_sysmem(CONFIG_SYS_BOOTCOUNT_ADDR, 2); | |
26 | buf[0] = BC_MAGIC; | |
27 | buf[1] = (a & 0xff); | |
28 | unmap_sysmem(buf); | |
29 | ||
30 | ret = fs_write(CONFIG_SYS_BOOTCOUNT_EXT_NAME, | |
31 | CONFIG_SYS_BOOTCOUNT_ADDR, 0, 2, &len); | |
32 | if (ret != 0) | |
33 | puts("Error storing bootcount\n"); | |
34 | } | |
35 | ||
36 | ulong bootcount_load(void) | |
37 | { | |
38 | u8 *buf; | |
39 | loff_t len_read; | |
40 | int ret; | |
41 | ||
42 | if (fs_set_blk_dev(CONFIG_SYS_BOOTCOUNT_EXT_INTERFACE, | |
43 | CONFIG_SYS_BOOTCOUNT_EXT_DEVPART, FS_TYPE_EXT)) { | |
44 | puts("Error selecting device\n"); | |
45 | return 0; | |
46 | } | |
47 | ||
48 | ret = fs_read(CONFIG_SYS_BOOTCOUNT_EXT_NAME, CONFIG_SYS_BOOTCOUNT_ADDR, | |
49 | 0, 2, &len_read); | |
50 | if (ret != 0 || len_read != 2) { | |
51 | puts("Error loading bootcount\n"); | |
52 | return 0; | |
53 | } | |
54 | ||
55 | buf = map_sysmem(CONFIG_SYS_BOOTCOUNT_ADDR, 2); | |
56 | if (buf[0] == BC_MAGIC) | |
57 | ret = buf[1]; | |
58 | ||
59 | unmap_sysmem(buf); | |
60 | ||
61 | return ret; | |
62 | } |