1*8427a524SIan Ray /*
2*8427a524SIan Ray * Copyright (c) 2017 General Electric Company. All rights reserved.
3*8427a524SIan Ray *
4*8427a524SIan Ray * SPDX-License-Identifier: GPL-2.0+
5*8427a524SIan Ray */
6*8427a524SIan Ray
7*8427a524SIan Ray #include <bootcount.h>
8*8427a524SIan Ray #include <fs.h>
9*8427a524SIan Ray #include <mapmem.h>
10*8427a524SIan Ray
11*8427a524SIan Ray #define BC_MAGIC 0xbc
12*8427a524SIan Ray
bootcount_store(ulong a)13*8427a524SIan Ray void bootcount_store(ulong a)
14*8427a524SIan Ray {
15*8427a524SIan Ray u8 *buf;
16*8427a524SIan Ray loff_t len;
17*8427a524SIan Ray int ret;
18*8427a524SIan Ray
19*8427a524SIan Ray if (fs_set_blk_dev(CONFIG_SYS_BOOTCOUNT_EXT_INTERFACE,
20*8427a524SIan Ray CONFIG_SYS_BOOTCOUNT_EXT_DEVPART, FS_TYPE_EXT)) {
21*8427a524SIan Ray puts("Error selecting device\n");
22*8427a524SIan Ray return;
23*8427a524SIan Ray }
24*8427a524SIan Ray
25*8427a524SIan Ray buf = map_sysmem(CONFIG_SYS_BOOTCOUNT_ADDR, 2);
26*8427a524SIan Ray buf[0] = BC_MAGIC;
27*8427a524SIan Ray buf[1] = (a & 0xff);
28*8427a524SIan Ray unmap_sysmem(buf);
29*8427a524SIan Ray
30*8427a524SIan Ray ret = fs_write(CONFIG_SYS_BOOTCOUNT_EXT_NAME,
31*8427a524SIan Ray CONFIG_SYS_BOOTCOUNT_ADDR, 0, 2, &len);
32*8427a524SIan Ray if (ret != 0)
33*8427a524SIan Ray puts("Error storing bootcount\n");
34*8427a524SIan Ray }
35*8427a524SIan Ray
bootcount_load(void)36*8427a524SIan Ray ulong bootcount_load(void)
37*8427a524SIan Ray {
38*8427a524SIan Ray u8 *buf;
39*8427a524SIan Ray loff_t len_read;
40*8427a524SIan Ray int ret;
41*8427a524SIan Ray
42*8427a524SIan Ray if (fs_set_blk_dev(CONFIG_SYS_BOOTCOUNT_EXT_INTERFACE,
43*8427a524SIan Ray CONFIG_SYS_BOOTCOUNT_EXT_DEVPART, FS_TYPE_EXT)) {
44*8427a524SIan Ray puts("Error selecting device\n");
45*8427a524SIan Ray return 0;
46*8427a524SIan Ray }
47*8427a524SIan Ray
48*8427a524SIan Ray ret = fs_read(CONFIG_SYS_BOOTCOUNT_EXT_NAME, CONFIG_SYS_BOOTCOUNT_ADDR,
49*8427a524SIan Ray 0, 2, &len_read);
50*8427a524SIan Ray if (ret != 0 || len_read != 2) {
51*8427a524SIan Ray puts("Error loading bootcount\n");
52*8427a524SIan Ray return 0;
53*8427a524SIan Ray }
54*8427a524SIan Ray
55*8427a524SIan Ray buf = map_sysmem(CONFIG_SYS_BOOTCOUNT_ADDR, 2);
56*8427a524SIan Ray if (buf[0] == BC_MAGIC)
57*8427a524SIan Ray ret = buf[1];
58*8427a524SIan Ray
59*8427a524SIan Ray unmap_sysmem(buf);
60*8427a524SIan Ray
61*8427a524SIan Ray return ret;
62*8427a524SIan Ray }
63