plat/intel/soc/stratix10/soc/s10_handoff.c

/*
 * Copyright (c) 2019, Intel Corporation. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <arch.h>
#include <arch_helpers.h>
#include <drivers/arm/gicv2.h>
#include <assert.h>
#include <common/bl_common.h>
#include <lib/mmio.h>
#include <string.h>
#include <plat/common/platform.h>
#include <platform_def.h>

#include "s10_handoff.h"

#define SWAP_UINT32(x) (((x) >> 24) | (((x) & 0x00FF0000) >> 8) |	\
				(((x) & 0x0000FF00) << 8) | ((x) << 24))

int s10_get_handoff(handoff *reverse_hoff_ptr)
{
	int i;
	uint32_t *buffer;
	handoff *handoff_ptr = (handoff *) PLAT_HANDOFF_OFFSET;

	memcpy(reverse_hoff_ptr, handoff_ptr, sizeof(handoff));
	buffer = (uint32_t *)reverse_hoff_ptr;

	/* convert big indian to little indian */
	for (i = 0; i < sizeof(handoff) / 4; i++)
		buffer[i] = SWAP_UINT32(buffer[i]);

	if (reverse_hoff_ptr->header_magic != HANDOFF_MAGIC_HEADER)
		return -1;
	if (reverse_hoff_ptr->pinmux_sel_magic != HANDOFF_MAGIC_PINMUX_SEL)
		return -1;
	if (reverse_hoff_ptr->pinmux_io_magic != HANDOFF_MAGIC_IOCTLR)
		return -1;
	if (reverse_hoff_ptr->pinmux_fpga_magic != HANDOFF_MAGIC_FPGA)
		return -1;
	if (reverse_hoff_ptr->pinmux_delay_magic != HANDOFF_MAGIC_IODELAY)
		return -1;

	return 0;
}