84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2017 General Electric Company. All rights reserved.
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*/
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#include <bootcount.h>
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#include <fs.h>
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#include <mapmem.h>
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#define BC_MAGIC 0xbd
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#define BC_VERSION 1
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typedef struct {
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u8 magic;
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u8 version;
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u8 bootcount;
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u8 upgrade_available;
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} bootcount_ext_t;
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static u8 upgrade_available = 1;
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void bootcount_store(ulong a)
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{
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bootcount_ext_t *buf;
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loff_t len;
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int ret;
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if (fs_set_blk_dev(CONFIG_SYS_BOOTCOUNT_EXT_INTERFACE,
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CONFIG_SYS_BOOTCOUNT_EXT_DEVPART, FS_TYPE_EXT)) {
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puts("Error selecting device\n");
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return;
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}
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/* Only update bootcount during upgrade process */
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if (!upgrade_available)
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return;
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buf = map_sysmem(CONFIG_SYS_BOOTCOUNT_ADDR, sizeof(bootcount_ext_t));
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buf->magic = BC_MAGIC;
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buf->version = BC_VERSION;
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buf->bootcount = (a & 0xff);
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buf->upgrade_available = upgrade_available;
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unmap_sysmem(buf);
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ret = fs_write(CONFIG_SYS_BOOTCOUNT_EXT_NAME,
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CONFIG_SYS_BOOTCOUNT_ADDR, 0, sizeof(bootcount_ext_t),
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&len);
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if (ret != 0)
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puts("Error storing bootcount\n");
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}
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ulong bootcount_load(void)
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{
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bootcount_ext_t *buf;
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loff_t len_read;
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int ret;
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if (fs_set_blk_dev(CONFIG_SYS_BOOTCOUNT_EXT_INTERFACE,
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CONFIG_SYS_BOOTCOUNT_EXT_DEVPART, FS_TYPE_EXT)) {
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puts("Error selecting device\n");
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return 0;
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}
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ret = fs_read(CONFIG_SYS_BOOTCOUNT_EXT_NAME, CONFIG_SYS_BOOTCOUNT_ADDR,
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0, sizeof(bootcount_ext_t), &len_read);
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if (ret != 0 || len_read != sizeof(bootcount_ext_t)) {
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puts("Error loading bootcount\n");
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return 0;
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}
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buf = map_sysmem(CONFIG_SYS_BOOTCOUNT_ADDR, sizeof(bootcount_ext_t));
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if (buf->magic == BC_MAGIC && buf->version == BC_VERSION) {
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upgrade_available = buf->upgrade_available;
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if (upgrade_available)
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ret = buf->bootcount;
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} else {
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puts("Incorrect bootcount file\n");
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}
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unmap_sysmem(buf);
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return ret;
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}
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