[J-u-boot.git] / drivers / bootcount / bootcount_at91.c

// SPDX-License-Identifier: GPL-2.0+

#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <asm/arch/at91_gpbr.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 & 0xffff0000) | (a & 0x0000ffff),
	       &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 & 0xffff0000) != (CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000))
		return 0;
	else
		return val & 0x0000ffff;
}
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
0044c42e	2
0044c42e SR	3	#include <asm/io.h>
	4	#include <asm/arch/hardware.h>
	5	#include <asm/arch/at91_gpbr.h>
	6
	7	/*
758694ff MV	8	* We combine the CONFIG_SYS_BOOTCOUNT_MAGIC and bootcount in one 32-bit
	9	* register. This is done so we need to use only one of the four GPBR
	10	* registers.
0044c42e SR	11	*/
	12	void bootcount_store(ulong a)
	13	{
	14	at91_gpbr_t gpbr = (at91_gpbr_t ) ATMEL_BASE_GPBR;
	15
758694ff MV	16	writel((CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000) \| (a & 0x0000ffff),
758694ff MV	17	&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
0044c42e SR	18	}
	19
	20	ulong bootcount_load(void)
	21	{
	22	at91_gpbr_t gpbr = (at91_gpbr_t ) ATMEL_BASE_GPBR;
	23
	24	ulong val = readl(&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
758694ff	25	if ((val & 0xffff0000) != (CONFIG_SYS_BOOTCOUNT_MAGIC & 0xffff0000))
0044c42e SR	26	return 0;
	27	else
	28	return val & 0x0000ffff;
	29	}