soc/intel/common: Generate the CSE RW metadata and add to FW_MAIN_A/B

In the existing implementation CSE RW metadata file is generated by
scripts and to avoid incompitable issues between coreboot and the
scripts this patch adds the follwing changes,
* Move the metadata generation to the coreboot Makefile.
* Add CBFS component type struct to create a metadata file during
  the compile time.
* Extract the CSE RW version from SOC_INTEL_CSE_RW_VERSION config
  and update the major, minor, hotfix and build versions using the
  compile time flags.
* Compute the hash of CSE RW binary in hex format using the openssl
  and use the HASH_BYTEARRAY macro to convert the 64 character hex
  values into the array.
* Add the me_rw.metadata cbfs file to FW_MAIN_A and FW_MAIN_B
  regions.

BUG=b:169077783
TEST= Built for dedede. Verify that metadata file was generated
and added to the FW_MAIN_A/B. Extracted it using cbfstool and
verfied that metadata was generated properly.

Change-Id: I412581400a9606fa17cf4398faffda923f07b320
Signed-off-by: V Sowmya <v.sowmya@intel.com>
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47431
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/soc/intel/common/block/include/intelblocks/cse.h b/src/soc/intel/common/block/include/intelblocks/cse.h
index f554933ef4..64ee0ddd06 100644
--- a/src/soc/intel/common/block/include/intelblocks/cse.h
+++ b/src/soc/intel/common/block/include/intelblocks/cse.h
@@ -4,6 +4,7 @@
 #define SOC_INTEL_COMMON_CSE_H
 
 #include <types.h>
+#include <vb2_api.h>
 
 /* MKHI Command groups */
 #define MKHI_GROUP_ID_CBM	0x0
@@ -61,6 +62,24 @@ struct mkhi_hdr {
 	uint8_t result;
 } __packed;
 
+/* CSE FW Version */
+struct fw_version {
+	uint16_t major;
+	uint16_t minor;
+	uint16_t hotfix;
+	uint16_t build;
+} __packed;
+
+/*
+ * CSE RW metadata structure
+ * fw_version - CSE RW firmware version
+ * sha256 - Hash of the CSE RW binary.
+ */
+struct cse_rw_metadata {
+	struct fw_version version;
+	uint8_t sha256[VB2_SHA256_DIGEST_SIZE];
+};
+
 /* set up device for use in early boot enviroument with temp bar */
 void heci_init(uintptr_t bar);
 /*