bootcount.c
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/*
* (C) Copyright 2010-2012
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <bootcount.h>
#include <linux/compiler.h>
/* Now implement the generic default functions */
__weak void bootcount_store(ulong a)
{
void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
#else
raw_bootcount_store(reg, a);
raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
#endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */
}
__weak ulong bootcount_load(void)
{
void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
#if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
u32 tmp = raw_bootcount_load(reg);
if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
return 0;
else
return (tmp & 0x0000ffff);
#else
if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC)
return 0;
else
return raw_bootcount_load(reg);
#endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) */
}