blob: 4b5cec58d08bbb28cbb5ff57e9cef8a080c41fa4 [file] [log] [blame]
Cooper Jr., Franklin92926bc2017-06-16 17:25:06 -05001/*
2 * (C) Copyright 2017
3 * Texas Instruments, <www.ti.com>
4 *
5 * Franklin S Cooper Jr. <fcooper@ti.com>
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10#include <boot_fit.h>
11#include <common.h>
12#include <errno.h>
13#include <image.h>
Masahiro Yamadab08c8c42018-03-05 01:20:11 +090014#include <linux/libfdt.h>
Cooper Jr., Franklin92926bc2017-06-16 17:25:06 -050015
Jean-Jacques Hiblot906a9db2017-09-15 12:57:25 +020016static int fdt_offset(const void *fit)
Cooper Jr., Franklin92926bc2017-06-16 17:25:06 -050017{
18 int images, node, fdt_len, fdt_node, fdt_offset;
19 const char *fdt_name;
20
21 node = fit_find_config_node(fit);
22 if (node < 0)
23 return node;
24
25 images = fdt_path_offset(fit, FIT_IMAGES_PATH);
26 if (images < 0) {
27 debug("%s: Cannot find /images node: %d\n", __func__, images);
Nobuhiro Iwamatsu160cfc42017-08-05 05:47:02 +090028 return -EINVAL;
Cooper Jr., Franklin92926bc2017-06-16 17:25:06 -050029 }
30
31 fdt_name = fdt_getprop(fit, node, FIT_FDT_PROP, &fdt_len);
32 if (!fdt_name) {
33 debug("%s: Cannot find fdt name property: %d\n",
34 __func__, fdt_len);
35 return -EINVAL;
36 }
37
38 fdt_node = fdt_subnode_offset(fit, images, fdt_name);
39 if (fdt_node < 0) {
40 debug("%s: Cannot find fdt node '%s': %d\n",
41 __func__, fdt_name, fdt_node);
42 return -EINVAL;
43 }
44
45 fdt_offset = fdt_getprop_u32(fit, fdt_node, "data-offset");
46
47 if (fdt_offset == FDT_ERROR)
48 return -ENOENT;
49
50 fdt_len = fdt_getprop_u32(fit, fdt_node, "data-size");
51
52 if (fdt_len < 0)
53 return fdt_len;
54
55 return fdt_offset;
56}
57
Jean-Jacques Hiblot906a9db2017-09-15 12:57:25 +020058void *locate_dtb_in_fit(const void *fit)
Cooper Jr., Franklin92926bc2017-06-16 17:25:06 -050059{
60 struct image_header *header;
61 int size;
62 int ret;
63
64 size = fdt_totalsize(fit);
65 size = (size + 3) & ~3;
66
67 header = (struct image_header *)fit;
68
69 if (image_get_magic(header) != FDT_MAGIC) {
70 debug("No FIT image appended to U-boot\n");
71 return NULL;
72 }
73
74 ret = fdt_offset(fit);
75
Jean-Jacques Hiblotd56b86e2017-09-15 12:57:26 +020076 if (ret < 0)
Cooper Jr., Franklin92926bc2017-06-16 17:25:06 -050077 return NULL;
78 else
79 return (void *)fit+size+ret;
80}