Add support for Brillo partitioning.

To generate partition tables in the Android build system, simply add
the path to a .bpt file to the BOARD_BPT_INPUT_FILES variable.

 BOARD_BPT_INPUT_FILES += "hardware/bsp/vendor/soc/board/board-specific.bpt"

The variable BOARD_BPT_DISK_SIZE can be used to specify or override
the disk size, for example:

 BOARD_BPT_DISK_SIZE := "10 GiB"

Additional arguments to 'bpttool make_table' can be specified in the
variable BOARD_BPT_MAKE_TABLE_ARGS.

If BOARD_BPT_INPUT_FILES is set, the build system generates two files

 partition-table.img
 partition-table.bpt

in ${ANDROID_PRODUCT_OUT} using 'bpttool make_table'. The former is
the binary partition tables generated using bptool's --output_gpt
option and the latter is a JSON file generated using the --output_json
option. These files will also be put in the IMAGES/ directory of
target-files.zip when running 'm dist'.

BUG=27831397
TEST=Manually tested.

Change-Id: Iedd15354afb2dd483dcb9bc001360b2a37fd6dc0
diff --git a/core/Makefile b/core/Makefile
index 7acf162..cb3074f 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1407,6 +1407,36 @@
 
 
 # -----------------------------------------------------------------
+# partition table image
+ifdef BOARD_BPT_INPUT_FILES
+
+BUILT_BPTIMAGE_TARGET := $(PRODUCT_OUT)/partition-table.img
+
+INTERNAL_BVBTOOL_MAKE_TABLE_ARGS := \
+	--output_gpt $(BUILT_BPTIMAGE_TARGET) \
+	--output_json $(PRODUCT_OUT)/partition-table.bpt \
+	$(foreach file, $(BOARD_BPT_INPUT_FILES), --input $(file))
+
+ifdef BOARD_BPT_DISK_SIZE
+INTERNAL_BVBTOOL_MAKE_TABLE_ARGS += --disk_size $(BOARD_BPT_DISK_SIZE)
+endif
+
+define build-bptimage-target
+  $(call pretty,"Target partition table image: $(INSTALLED_BPTIMAGE_TARGET)")
+  $(hide) $(BPTTOOL) make_table $(INTERNAL_BVBTOOL_MAKE_TABLE_ARGS) $(BOARD_BPT_MAKE_TABLE_ARGS)
+endef
+
+INSTALLED_BPTIMAGE_TARGET := $(BUILT_BPTIMAGE_TARGET)
+$(INSTALLED_BPTIMAGE_TARGET): $(BPTTOOL) $(BOARD_BPT_INPUT_FILES)
+	$(build-bptimage-target)
+
+.PHONY: bptimage-nodeps
+bptimage-nodeps:
+	$(build-bptimage-target)
+
+endif # BOARD_BPT_INPUT_FILES
+
+# -----------------------------------------------------------------
 # cache partition image
 ifdef BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE
 INTERNAL_CACHEIMAGE_FILES := \
@@ -1812,6 +1842,14 @@
 	$(hide) echo "board_bvb_rollback_index=$(BOARD_BVB_ROLLBACK_INDEX)" >> $(zip_root)/META/misc_info.txt
 	$(hide) echo "board_bvb_add_image_hashes_args=$(BOARD_BVB_ADD_IMAGE_HASHES_ARGS)" >> $(zip_root)/META/misc_info.txt
 endif
+ifdef BOARD_BPT_INPUT_FILES
+	$(hide) echo "board_bpt_enable=true" >> $(zip_root)/META/misc_info.txt
+	$(hide) echo "board_bpt_make_table_args=$(BOARD_BPT_MAKE_TABLE_ARGS)" >> $(zip_root)/META/misc_info.txt
+	$(hide) echo "board_bpt_input_files=$(BOARD_BPT_INPUT_FILES)" >> $(zip_root)/META/misc_info.txt
+endif
+ifdef BOARD_BPT_DISK_SIZE
+	$(hide) echo "board_bpt_disk_size=$(BOARD_BPT_DISK_SIZE)" >> $(zip_root)/META/misc_info.txt
+endif
 	$(call generate-userimage-prop-dictionary, $(zip_root)/META/misc_info.txt)
 ifneq ($(INSTALLED_RECOVERYIMAGE_TARGET),)
 	$(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH MKBOOTIMG=$(MKBOOTIMG) \
diff --git a/core/config.mk b/core/config.mk
index 6df4430..e63a135 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -525,6 +525,11 @@
 else
 MKBOOTIMG := $(BOARD_CUSTOM_MKBOOTIMG)
 endif
+ifeq (,$(strip $(BOARD_CUSTOM_BPTTOOL)))
+BPTTOOL := $(HOST_OUT_EXECUTABLES)/bpttool$(HOST_EXECUTABLE_SUFFIX)
+else
+BPTTOOL := $(BOARD_CUSTOM_BPTTOOL)
+endif
 ifeq (,$(strip $(BOARD_CUSTOM_BVBTOOL)))
 BVBTOOL := $(HOST_OUT_EXECUTABLES)/bvbtool$(HOST_EXECUTABLE_SUFFIX)
 else
diff --git a/core/main.mk b/core/main.mk
index d74d8bb..994a701 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -77,6 +77,7 @@
     stnod systemtarball-nodeps \
     userdataimage-nodeps userdatatarball-nodeps \
     cacheimage-nodeps \
+    bptimage-nodeps \
     vendorimage-nodeps \
     ramdisk-nodeps \
     bootimage-nodeps \
@@ -905,6 +906,9 @@
 .PHONY: cacheimage
 cacheimage: $(INSTALLED_CACHEIMAGE_TARGET)
 
+.PHONY: bptimage
+bptimage: $(INSTALLED_BPTIMAGE_TARGET)
+
 .PHONY: vendorimage
 vendorimage: $(INSTALLED_VENDORIMAGE_TARGET)
 
@@ -934,6 +938,7 @@
 	$(INSTALLED_RECOVERYIMAGE_TARGET) \
 	$(INSTALLED_USERDATAIMAGE_TARGET) \
 	$(INSTALLED_CACHEIMAGE_TARGET) \
+	$(INSTALLED_BPTIMAGE_TARGET) \
 	$(INSTALLED_VENDORIMAGE_TARGET) \
 	$(INSTALLED_FILES_FILE) \
 	$(INSTALLED_FILES_FILE_VENDOR)