mirror of
https://github.com/AsahiLinux/u-boot
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44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
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/*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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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 BOOTCOUNT_MAGIC and bootcount in one 32-bit register.
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* This is done so we need to use only one of the four GPBR 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((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) != (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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