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chromeec: Move EC image hash to separate file in CBFS 

The Chrome OS bootloader is changing its EC software sync mechanism to
look for the hash of an EC image in a separate CBFS file, rather than
using the CBFS hash attribute of the image itself (see
http://crosreview.com/348061). This patch makes coreboot generate
appropriate hash files for the new format when it builds and bundles a
Chrome EC image. This also allows us to compress the EC image itself.

Change-Id: I9aee6b8d24cdf41cb540db86a7569038fc7d9937
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/15039
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Julius Werner 2016-05-31 18:11:10 -07:00 committed by Martin Roth
parent 3fa4350d6a
commit 8e97d00755
1 changed files with 13 additions and 2 deletions
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15
src/ec/google/chromeec/Makefile.inc
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@ -37,13 +37,21 @@ cbfs-files-$(if $(CONFIG_EC_GOOGLE_CHROMEEC_BOARDNAME),y) += ecrw
ecrw-file := $(obj)/mainboard/$(MAINBOARDDIR)/ecrw
ecrw-name := ecrw
ecrw-type := raw
ecrw-options := -A sha256
ecrw-compression := $(CBFS_COMPRESS_FLAG)
cbfs-files-$(if $(CONFIG_EC_GOOGLE_CHROMEEC_BOARDNAME),y) += ecrw.hash
ecrw.hash-file := $(obj)/mainboard/$(MAINBOARDDIR)/ecrw.hash
ecrw.hash-name := ecrw.hash
ecrw.hash-type := raw
cbfs-files-$(if $(CONFIG_EC_GOOGLE_CHROMEEC_PD_BOARDNAME),y) += pdrw
pdrw-file := $(obj)/mainboard/$(MAINBOARDDIR)/pdrw
pdrw-name := pdrw
pdrw-type := raw
pdrw-options := -A sha256
pdrw-compression := $(CBFS_COMPRESS_FLAG)
cbfs-files-$(if $(CONFIG_EC_GOOGLE_CHROMEEC_PD_BOARDNAME),y) += pdrw.hash
pdrw.hash-file := $(obj)/mainboard/$(MAINBOARDDIR)/pdrw.hash
pdrw.hash-name := pdrw.hash
pdrw.hash-type := raw
$(obj)/mainboard/$(MAINBOARDDIR)/ecrw:
$(MAKE) -C $(top)/3rdparty/chromeec \
@ -63,6 +71,9 @@ $(obj)/mainboard/$(MAINBOARDDIR)/pdrw:
rw
cp $(obj)/external/chromeec/$(CONFIG_EC_GOOGLE_CHROMEEC_PD_BOARDNAME)/RW/ec.RW.flat $@
$(obj)/mainboard/$(MAINBOARDDIR)/%.hash: $(obj)/mainboard/$(MAINBOARDDIR)/%
openssl dgst -sha256 -binary $< > $@
.PHONY: $(obj)/mainboard/$(MAINBOARDDIR)/ecrw $(obj)/mainboard/$(MAINBOARDDIR)/pdrw
endif