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https://github.com/AsahiLinux/u-boot
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758694ff07
Add new Kconfig option, SYS_BOOTCOUNT_MAGIC, to select the boot counter magic word. This can be useful ie. in case the entire boot counter register is not usable. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Tom Rini <trini@konsulko.com>
30 lines
774 B
C
30 lines
774 B
C
// SPDX-License-Identifier: GPL-2.0+
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/at91_gpbr.h>
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/*
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* We combine the CONFIG_SYS_BOOTCOUNT_MAGIC and bootcount in one 32-bit
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* register. This is done so we need to use only one of the four GPBR
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* registers.
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*/
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void bootcount_store(ulong a)
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{
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at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
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writel((CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff),
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&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
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}
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ulong bootcount_load(void)
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{
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at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
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ulong val = readl(&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
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if ((val & 0xffff0000) != (CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000))
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return 0;
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else
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return val & 0x0000ffff;
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}
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