diff options
Diffstat (limited to 'src/lib/device_tree.c')
| -rw-r--r-- | src/lib/device_tree.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/lib/device_tree.c b/src/lib/device_tree.c index bb40eee231..7a3128efcf 100644 --- a/src/lib/device_tree.c +++ b/src/lib/device_tree.c @@ -220,6 +220,24 @@ struct device_tree *fdt_unflatten(const void *blob) const struct fdt_header *header = (const struct fdt_header *)blob; tree->header = header; + uint32_t magic = be32toh(header->magic); + uint32_t version = be32toh(header->version); + uint32_t last_comp_version = be32toh(header->last_comp_version); + + if (magic != FDT_HEADER_MAGIC) { + printk(BIOS_DEBUG, "Invalid device tree magic %#.8x!\n", magic); + return NULL; + } + if (last_comp_version > FDT_SUPPORTED_VERSION) { + printk(BIOS_DEBUG, "Unsupported device tree version %u(>=%u)\n", + version, last_comp_version); + return NULL; + } + if (version > FDT_SUPPORTED_VERSION) + printk(BIOS_DEBUG, + "NOTE: FDT version %u too new, should add support!\n", + version); + uint32_t struct_offset = be32toh(header->structure_offset); uint32_t strings_offset = be32toh(header->strings_offset); uint32_t reserve_offset = be32toh(header->reserve_map_offset); |