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authorArthur Heymans <arthur@aheymans.xyz>2018-06-13 15:39:57 +0200
committerPatrick Georgi <pgeorgi@google.com>2018-06-22 09:20:22 +0000
commit9700e91b10411d5b5b5d3ff9345573557cf24c84 (patch)
tree9d9ffc7579f26129dea31b043453b5f4ff8e87c6 /util/cbfstool/fit.c
parentd5018a8f78b9e1f0b7d3d1be298cba9716b10c6c (diff)
downloadcoreboot-9700e91b10411d5b5b5d3ff9345573557cf24c84.tar.xz
cbfstool/fit.c: Fix for older CPUs without total_size in mcu_header
Some older CPUs have a fixed size of 2048 bytes for microcode total size. Change-Id: Ia50c087af41b0df14b607ce3c3b4eabc602e8738 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/27090 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'util/cbfstool/fit.c')
-rw-r--r--util/cbfstool/fit.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/util/cbfstool/fit.c b/util/cbfstool/fit.c
index e3e6c32a6f..d33cb56749 100644
--- a/util/cbfstool/fit.c
+++ b/util/cbfstool/fit.c
@@ -226,13 +226,18 @@ static int parse_microcode_blob(struct cbfs_image *image,
mcu_header = rom_buffer_pointer(&image->buffer, current_offset);
+ /* Newer microcode updates include a size field, whereas older
+ * containers set it at 0 and are exactly 2048 bytes long */
+ uint32_t total_size = mcu_header->total_size
+ ? mcu_header->total_size : 2048;
+
/* Quickly sanity check a prospective microcode update. */
- if (mcu_header->total_size < sizeof(*mcu_header))
+ if (total_size < sizeof(*mcu_header))
break;
/* FIXME: Should the checksum be validated? */
mcus[num_mcus].offset = current_offset;
- mcus[num_mcus].size = mcu_header->total_size;
+ mcus[num_mcus].size = total_size;
/* Proceed to next payload. */
current_offset += mcus[num_mcus].size;