boot_fit.c
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/*
* (C) Copyright 2017
* Texas Instruments, <www.ti.com>
*
* Franklin S Cooper Jr. <fcooper@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <boot_fit.h>
#include <common.h>
#include <errno.h>
#include <image.h>
#include <linux/libfdt.h>
static int fdt_offset(const void *fit)
{
int images, node, fdt_len, fdt_node, fdt_offset;
const char *fdt_name;
node = fit_find_config_node(fit);
if (node < 0)
return node;
images = fdt_path_offset(fit, FIT_IMAGES_PATH);
if (images < 0) {
debug("%s: Cannot find /images node: %d\n", __func__, images);
return -EINVAL;
}
fdt_name = fdt_getprop(fit, node, FIT_FDT_PROP, &fdt_len);
if (!fdt_name) {
debug("%s: Cannot find fdt name property: %d\n",
__func__, fdt_len);
return -EINVAL;
}
fdt_node = fdt_subnode_offset(fit, images, fdt_name);
if (fdt_node < 0) {
debug("%s: Cannot find fdt node '%s': %d\n",
__func__, fdt_name, fdt_node);
return -EINVAL;
}
fdt_offset = fdt_getprop_u32(fit, fdt_node, "data-offset");
if (fdt_offset == FDT_ERROR)
return -ENOENT;
fdt_len = fdt_getprop_u32(fit, fdt_node, "data-size");
if (fdt_len < 0)
return fdt_len;
return fdt_offset;
}
void *locate_dtb_in_fit(const void *fit)
{
struct image_header *header;
int size;
int ret;
size = fdt_totalsize(fit);
size = (size + 3) & ~3;
header = (struct image_header *)fit;
if (image_get_magic(header) != FDT_MAGIC) {
debug("No FIT image appended to U-boot\n");
return NULL;
}
ret = fdt_offset(fit);
if (ret < 0)
return NULL;
else
return (void *)fit+size+ret;
}