soc/intel/apollolake: add support for extracting LBP2 from IFWI

Add support for automatic extraction of the Second Logical Boot
Partition from the supplied IFWI binary.

Change-Id: Ia2a9ca233bddb8e9fb4e980f0ae5e6fcf3fc757c
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37681
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/apollolake/Kconfig b/src/soc/intel/apollolake/Kconfig
index 0b3b30a..a39765f 100644
--- a/src/soc/intel/apollolake/Kconfig
+++ b/src/soc/intel/apollolake/Kconfig
@@ -211,9 +211,17 @@
 	help
 	  Name of FMAP region to write logical boot partition 2 data.
 
+config LBP2_FROM_IFWI
+	bool "Extract the LBP2 from the IFWI binary"
+	depends on NEED_LBP2
+	default n
+	help
+	 The Logical Boot Partition will be automatically extracted
+	 from the supplied IFWI binary
+
 config LBP2_FILE_NAME
 	string "Path of file to write to logical boot partition 2 region"
-	depends on NEED_LBP2
+	depends on NEED_LBP2 && !LBP2_FROM_IFWI
 	default "3rdparty/blobs/mainboard/$(CONFIG_MAINBOARD_DIR)/lbp2.bin"
 	help
 	  Name of file to store in the logical boot partition 2 region.
diff --git a/src/soc/intel/apollolake/Makefile.inc b/src/soc/intel/apollolake/Makefile.inc
index 24375b3..d633169 100644
--- a/src/soc/intel/apollolake/Makefile.inc
+++ b/src/soc/intel/apollolake/Makefile.inc
@@ -117,8 +117,16 @@
 endif
 
 ifeq ($(CONFIG_NEED_LBP2),y)
-files_added::
-	$(CBFSTOOL) $(obj)/coreboot.rom write -r $(CONFIG_LBP2_FMAP_NAME) -f $(CONFIG_LBP2_FILE_NAME) --fill-upward
+$(objcbfs)/lbp2.bin: $(IFWITOOL)
+ifeq ($(CONFIG_LBP2_FROM_IFWI),y)
+	$(IFWITOOL) $(CONFIG_IFWI_FILE_NAME) create -f $@ -s
+	$(IFWITOOL) $@ delete -n OBBP
+else
+	cp $(CONFIG_LBP2_FILE_NAME) $@
+endif
+
+files_added:: $(objcbfs)/lbp2.bin
+	$(CBFSTOOL) $(obj)/coreboot.rom write -r $(CONFIG_LBP2_FMAP_NAME) -f $< --fill-upward
 endif
 
 # Bootblock on Apollolake platform lies in the IFWI region. In order to place