u-boot/arch/arm/cpu/armv8/spl_data.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2020 NXP
*/
#include <common.h>
#include <spl.h>
char __data_save_start[0] __section(".__data_save_start");
char __data_save_end[0] __section(".__data_save_end");
u32 cold_reboot_flag = 1;
void spl_save_restore_data(void)
{
u32 data_size = __data_save_end - __data_save_start;
if (cold_reboot_flag == 1) {
/* Save data section to data_save section */
memcpy(__data_save_start, __data_save_start - data_size,
data_size);
} else {
/* Restore the data_save section to data section */
memcpy(__data_save_start - data_size, __data_save_start,
data_size);
}
cold_reboot_flag++;
}