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git.ipfire.org Git - thirdparty/u-boot.git/blob - common/image-android-dt.c
1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2018 Linaro Ltd.
4 * Sam Protsenko <semen.protsenko@linaro.org>
7 #include <image-android-dt.h>
10 #include <linux/libfdt.h>
14 * Check if image header is correct.
16 * @param hdr_addr Start address of DT image
17 * @return true if header is correct or false if header is incorrect
19 bool android_dt_check_header(ulong hdr_addr
)
21 const struct dt_table_header
*hdr
;
24 hdr
= map_sysmem(hdr_addr
, sizeof(*hdr
));
25 magic
= fdt32_to_cpu(hdr
->magic
);
28 return magic
== DT_TABLE_MAGIC
;
32 * Get the address of FDT (dtb or dtbo) in memory by its index in image.
34 * @param hdr_addr Start address of DT image
35 * @param index Index of desired FDT in image (starting from 0)
36 * @param[out] addr If not NULL, will contain address to specified FDT
37 * @param[out] size If not NULL, will contain size of specified FDT
39 * @return true on success or false on error
41 bool android_dt_get_fdt_by_index(ulong hdr_addr
, u32 index
, ulong
*addr
,
44 const struct dt_table_header
*hdr
;
45 const struct dt_table_entry
*e
;
46 u32 entry_count
, entries_offset
, entry_size
;
48 u32 dt_offset
, dt_size
;
50 hdr
= map_sysmem(hdr_addr
, sizeof(*hdr
));
51 entry_count
= fdt32_to_cpu(hdr
->dt_entry_count
);
52 entries_offset
= fdt32_to_cpu(hdr
->dt_entries_offset
);
53 entry_size
= fdt32_to_cpu(hdr
->dt_entry_size
);
56 if (index
>= entry_count
) {
57 printf("Error: index >= dt_entry_count (%u >= %u)\n", index
,
62 e_addr
= hdr_addr
+ entries_offset
+ index
* entry_size
;
63 e
= map_sysmem(e_addr
, sizeof(*e
));
64 dt_offset
= fdt32_to_cpu(e
->dt_offset
);
65 dt_size
= fdt32_to_cpu(e
->dt_size
);
69 *addr
= hdr_addr
+ dt_offset
;
76 #if !defined(CONFIG_SPL_BUILD)
77 static void android_dt_print_fdt_info(const struct fdt_header
*fdt
)
81 const char *compatible
;
83 root_node_off
= fdt_path_offset(fdt
, "/");
84 if (root_node_off
< 0) {
85 printf("Error: Root node not found\n");
89 fdt_size
= fdt_totalsize(fdt
);
90 compatible
= fdt_getprop(fdt
, root_node_off
, "compatible",
93 printf(" (FDT)size = %d\n", fdt_size
);
94 printf(" (FDT)compatible = %s\n",
95 compatible
? compatible
: "(unknown)");
99 * Print information about DT image structure.
101 * @param hdr_addr Start address of DT image
103 void android_dt_print_contents(ulong hdr_addr
)
105 const struct dt_table_header
*hdr
;
106 u32 entry_count
, entries_offset
, entry_size
;
109 hdr
= map_sysmem(hdr_addr
, sizeof(*hdr
));
110 entry_count
= fdt32_to_cpu(hdr
->dt_entry_count
);
111 entries_offset
= fdt32_to_cpu(hdr
->dt_entries_offset
);
112 entry_size
= fdt32_to_cpu(hdr
->dt_entry_size
);
114 /* Print image header info */
115 printf("dt_table_header:\n");
116 printf(" magic = %08x\n", fdt32_to_cpu(hdr
->magic
));
117 printf(" total_size = %d\n", fdt32_to_cpu(hdr
->total_size
));
118 printf(" header_size = %d\n", fdt32_to_cpu(hdr
->header_size
));
119 printf(" dt_entry_size = %d\n", entry_size
);
120 printf(" dt_entry_count = %d\n", entry_count
);
121 printf(" dt_entries_offset = %d\n", entries_offset
);
122 printf(" page_size = %d\n", fdt32_to_cpu(hdr
->page_size
));
123 printf(" version = %d\n", fdt32_to_cpu(hdr
->version
));
127 /* Print image entries info */
128 for (i
= 0; i
< entry_count
; ++i
) {
129 const ulong e_addr
= hdr_addr
+ entries_offset
+ i
* entry_size
;
130 const struct dt_table_entry
*e
;
131 const struct fdt_header
*fdt
;
132 u32 dt_offset
, dt_size
;
135 e
= map_sysmem(e_addr
, sizeof(*e
));
136 dt_offset
= fdt32_to_cpu(e
->dt_offset
);
137 dt_size
= fdt32_to_cpu(e
->dt_size
);
139 printf("dt_table_entry[%d]:\n", i
);
140 printf(" dt_size = %d\n", dt_size
);
141 printf(" dt_offset = %d\n", dt_offset
);
142 printf(" id = %08x\n", fdt32_to_cpu(e
->id
));
143 printf(" rev = %08x\n", fdt32_to_cpu(e
->rev
));
144 for (j
= 0; j
< 4; ++j
) {
145 printf(" custom[%d] = %08x\n", j
,
146 fdt32_to_cpu(e
->custom
[j
]));
151 /* Print FDT info for this entry */
152 fdt
= map_sysmem(hdr_addr
+ dt_offset
, sizeof(*fdt
));
153 android_dt_print_fdt_info(fdt
);