mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2026-05-04 20:26:13 +02:00
27e1924ffa
Use predefined bit masks in operations where only the magic half or only the count half of the 32-bit value are processed. Signed-off-by: Niko Mauno <niko.mauno@vaisala.com> Reviewed-by: Tom Rini <trini@konsulko.com>
31 lines
827 B
C
31 lines
827 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/arch/hardware.h>
|
|
#include <asm/arch/at91_gpbr.h>
|
|
#include <bootcount.h>
|
|
|
|
/*
|
|
* We combine the CONFIG_SYS_BOOTCOUNT_MAGIC and bootcount in one 32-bit
|
|
* register. This is done so we need to use only one of the four GPBR
|
|
* registers.
|
|
*/
|
|
void bootcount_store(ulong a)
|
|
{
|
|
at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
|
|
|
|
writel((CONFIG_SYS_BOOTCOUNT_MAGIC & BOOTCOUNT_MAGIC_MASK) | (a & BOOTCOUNT_COUNT_MASK),
|
|
&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
|
|
}
|
|
|
|
ulong bootcount_load(void)
|
|
{
|
|
at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
|
|
|
|
ulong val = readl(&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
|
|
if ((val & BOOTCOUNT_MAGIC_MASK) != (CONFIG_SYS_BOOTCOUNT_MAGIC & BOOTCOUNT_MAGIC_MASK))
|
|
return 0;
|
|
else
|
|
return val & BOOTCOUNT_COUNT_MASK;
|
|
}
|