common/spl/spl_legacy.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2020 Stefan Roese <sr@denx.de>
 */

#include <common.h>
#include <spl.h>

int spl_parse_legacy_header(struct spl_image_info *spl_image,
			    const struct image_header *header)
{
	u32 header_size = sizeof(struct image_header);

	/* check uImage header CRC */
	if (IS_ENABLED(CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK) &&
	    !image_check_hcrc(header)) {
		puts("SPL: Image header CRC check failed!\n");
		return -EINVAL;
	}

	if (spl_image->flags & SPL_COPY_PAYLOAD_ONLY) {
		/*
		 * On some system (e.g. powerpc), the load-address and
		 * entry-point is located at address 0. We can't load
		 * to 0-0x40. So skip header in this case.
		 */
		spl_image->load_addr = image_get_load(header);
		spl_image->entry_point = image_get_ep(header);
		spl_image->size = image_get_data_size(header);
	} else {
		spl_image->entry_point = image_get_ep(header);
		/* Load including the header */
		spl_image->load_addr = image_get_load(header) -
			header_size;
		spl_image->size = image_get_data_size(header) +
			header_size;
	}

#ifdef CONFIG_SPL_LEGACY_IMAGE_CRC_CHECK
	/* store uImage data length and CRC to check later */
	spl_image->dcrc_data = image_get_load(header);
	spl_image->dcrc_length = image_get_data_size(header);
	spl_image->dcrc = image_get_dcrc(header);
#endif

	spl_image->os = image_get_os(header);
	spl_image->name = image_get_name(header);
	debug(SPL_TPL_PROMPT
	      "payload image: %32s load addr: 0x%lx size: %d\n",
	      spl_image->name, spl_image->load_addr, spl_image->size);

	return 0;
}

int spl_load_legacy_img(struct spl_image_info *spl_image,
			struct spl_load_info *load, ulong header)
{
	struct image_header hdr;
	int ret;

	/* Read header into local struct */
	load->read(load, header, sizeof(hdr), &hdr);

	ret = spl_parse_image_header(spl_image, &hdr);
	if (ret)
		return ret;

	/* Read image */
	load->read(load, header + sizeof(hdr), spl_image->size,
		   (void *)(unsigned long)spl_image->load_addr);

	return 0;
}