Add microcode blob processing

When microcode storage in CBFS is enabled, the make system is supposed
to generate the microcode blob and place it into the generated ROM
image as a CBFS component.

The microcode source representation does not change: it is still an
array of 32 bit constants. This new addition compiles the array into a
separate object file and then strips all sections but data.

The raw data section is then included into CBFS as a file named
'microcode_blob.bin' of type 0x53, which is assigned to microcode
storage.

Change-Id: I84ae040be52f520b106e3471c7e391e64d7847d9
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://review.coreboot.org/1295
Tested-by: build bot (Jenkins)
This commit is contained in:
Vadim Bendebury 2012-06-19 08:34:51 -07:00 committed by Stefan Reinauer
parent 537b4e09e6
commit 39fea6e2a8
3 changed files with 42 additions and 0 deletions

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@ -34,6 +34,12 @@ cmos_layout.bin-type = 0x01aa
OPTION_TABLE_H:=$(obj)/option_table.h
endif
ifeq ($(CONFIG_MICROCODE_IN_CBFS),y)
cbfs-files-y += microcode_blob.bin
microcode_blob.bin-file = $(obj)/microcode_blob.bin
microcode_blob.bin-type = 0x53
endif
#######################################################################
# Build the final rom image
COREBOOT_ROM_DEPENDENCIES:=

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@ -1 +1,15 @@
ramstage-y += microcode.c
ifeq ($(CONFIG_MICROCODE_IN_CBFS),y)
SRC_PATH = src/cpu/intel/microcode
FLAGS = -I $(CONFIG_MICROCODE_INCLUDE_PATH) -include $(obj)/config.h
$(obj)/microcode_blob.o: $(SRC_PATH)/microcode_blob.c
$(CC) $(FLAGS) -MMD -c -o $@ $<
$(obj)/microcode_blob.bin: $(obj)/microcode_blob.o
objcopy -j .data -O binary $< $@
-include $(obj)/microcode_blob.d
endif

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@ -0,0 +1,22 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2012 The ChromiumOS Authors. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
unsigned microcode[] = {
#include <microcode_blob.h>
};