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util/ifdtool: Add option to create FMAP template

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On systems that do not provide their own *.fmd (Flashmap) file, we
fall back to a default flashmap file. That file however does not contain
the blobs (ME, GBE ...), that are usually placed below the BIOS Flashmap.
It can therefore easily happen that the placement of the blobs collides
with the placement of the BIOS region (e.g. if CBFS_SIZE is big enough).
The fmaptool can't catch that, since it does not know of the blobs
placement.

This patch basically maps the regions described in the IFD (Intel
Firmware Descriptor) to the default Flashmap.

Test: Build and see that build/fmap.fmd contains all blobs now (on intel
systems that are supported by the ifdtool)

Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: I82cb252fff456773af69943e188480a4998736fd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73487
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
This commit is contained in:
Maximilian Brune
2023-03-05 20:55:32 +01:00
committed by Lean Sheng Tan
parent a3391e5f7a
commit 347596ae6e
3 changed files with 118 additions and 7 deletions
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15
Makefile.inc
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@@ -934,11 +934,22 @@ prebuild-files = $(foreach region,$(all-regions), \
$(call sort-files,$(call placed-files-in-region,$(region))), \
$(call cbfs-add-cmd,$(file),$(region),$(CONFIG_UPDATE_IMAGE))))
# If no FMD file (Flashmap) is supplied by mainboard, fall back to a default
ifeq ($(CONFIG_FMDFILE),)
# For a description of the flash layout described by these variables, check
# the $(DEFAULT_FLASHMAP) .fmd files.
ifeq ($(CONFIG_ARCH_X86),y)
DEFAULT_FLASHMAP:=$(top)/util/cbfstool/default-x86.fmd
# check if IFD_CHIPSET is set and if yes generate a FMAP template from IFD descriptor
ifneq ($(CONFIG_IFD_CHIPSET),)
ifeq ($(CONFIG_HAVE_IFD_BIN),y)
DEFAULT_FLASHMAP:=$(obj)/fmap-template.fmd
$(DEFAULT_FLASHMAP): $(call strip_quotes,$(CONFIG_IFD_BIN_PATH)) $(IFDTOOL)
echo " IFDTOOL -p $(CONFIG_IFD_CHIPSET) -F $@ $<"
$(IFDTOOL) -p $(CONFIG_IFD_CHIPSET) -F $@ $<
endif # ifeq($(CONFIG_HAVE_IFD_BIN),y)
endif # ifneq($(CONFIG_IFD_CHIPSET),)
# entire flash
FMAP_ROM_ADDR := $(call int-subtract, 0x100000000 $(CONFIG_ROM_SIZE))
FMAP_ROM_SIZE := $(CONFIG_ROM_SIZE)