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)
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@ -34,6 +34,12 @@ cmos_layout.bin-type = 0x01aa
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OPTION_TABLE_H:=$(obj)/option_table.h
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endif
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ifeq ($(CONFIG_MICROCODE_IN_CBFS),y)
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cbfs-files-y += microcode_blob.bin
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microcode_blob.bin-file = $(obj)/microcode_blob.bin
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microcode_blob.bin-type = 0x53
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endif
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#######################################################################
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# Build the final rom image
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COREBOOT_ROM_DEPENDENCIES:=
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@ -1 +1,15 @@
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ramstage-y += microcode.c
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ifeq ($(CONFIG_MICROCODE_IN_CBFS),y)
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SRC_PATH = src/cpu/intel/microcode
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FLAGS = -I $(CONFIG_MICROCODE_INCLUDE_PATH) -include $(obj)/config.h
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$(obj)/microcode_blob.o: $(SRC_PATH)/microcode_blob.c
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$(CC) $(FLAGS) -MMD -c -o $@ $<
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$(obj)/microcode_blob.bin: $(obj)/microcode_blob.o
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objcopy -j .data -O binary $< $@
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-include $(obj)/microcode_blob.d
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endif
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@ -0,0 +1,22 @@
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2012 The ChromiumOS Authors. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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unsigned microcode[] = {
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#include <microcode_blob.h>
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};
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