u-boot-imx/drivers/bootcount/bootcount_f1.c

#include <bootcount.h>
#include <flintstone_lpgpr.h>

/* F1 also uses SNVS LPGPR for reset cause information */

void bootcount_store(ulong a)
{
	void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
	u32 snvs = readl(SNVS_BASE_ADDR + SNVS_LPGPR);

	snvs &= ~LPGPR_BOOTCOUNT_MASK;
	snvs |= a & LPGPR_BOOTCOUNT_MASK;

	raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & LPGPR_UBOOT_MAGIC_MASK) | (snvs & 0xffff));
}

ulong bootcount_load(void)
{
	void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;

	u32 tmp = raw_bootcount_load(reg);

	if ((tmp & LPGPR_UBOOT_MAGIC_MASK) != (BOOTCOUNT_MAGIC & LPGPR_UBOOT_MAGIC_MASK))
		return 0;
	else
		return (tmp & LPGPR_BOOTCOUNT_MASK);
}