Add mediatek custom boot.img generation

BoardConfig.mk

@@ -27,6 +27,7 @@ TARGET_CPU_ABI2 := armeabi
 TARGET_CPU_SMP := true
 
 # Kernel Config
+BOARD_CUSTOM_BOOTIMG_MK := device/amazon/ford/mkbootimg.mk
 BOARD_MKBOOTIMG_ARGS := --ramdisk_offset 0x04000000 --tags_offset 0x00000100
 BOARD_KERNEL_CMDLINE := androidboot.selinux=permissive
 BOARD_KERNEL_BASE := 0x80000000

mkbootimg.mk

@@ -0,0 +1,77 @@
+#
+# Copyright (C) 2017 The Android Open-Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# can this be done in bash? credits go to bgcngm
+define make_header
+  perl -e 'print pack("a4 L a32 a472", "\x88\x16\x88\x58", $$ARGV[0], $$ARGV[1], "\xFF"x472)' $(1) $(2) > $(3)
+endef
+
+# this is overriding targets from build/core/Makefile
+$(INSTALLED_KERNEL_TARGET).mtk.header: $(INSTALLED_KERNEL_TARGET)
+	size=$$($(call get-file-size,$(INSTALLED_KERNEL_TARGET))); \
+		$(call make_header, $$((size)), "KERNEL", $@)
+$(INSTALLED_KERNEL_TARGET).mtk: $(INSTALLED_KERNEL_TARGET).mtk.header
+	$(call pretty,"Adding MTK header to kernel.")
+	cat $(INSTALLED_KERNEL_TARGET).mtk.header $(INSTALLED_KERNEL_TARGET) \
+		> $@
+
+$(INSTALLED_RAMDISK_TARGET).mtk.header: $(INSTALLED_RAMDISK_TARGET)
+	size=$$($(call get-file-size,$(INSTALLED_RAMDISK_TARGET))); \
+		$(call make_header, $$((size)), "ROOTFS", $@)
+$(INSTALLED_RAMDISK_TARGET).mtk: $(INSTALLED_RAMDISK_TARGET).mtk.header
+	$(call pretty,"Adding MTK header to ramdisk.")
+	cat $(INSTALLED_RAMDISK_TARGET).mtk.header $(INSTALLED_RAMDISK_TARGET) \
+		> $@
+
+$(PRODUCT_OUT)/recovery_kernel.mtk.header: $(recovery_kernel)
+	size=$$($(call get-file-size,$(recovery_kernel))); \
+		$(call make_header, $$((size)), "KERNEL", $@)
+$(PRODUCT_OUT)/recovery_kernel.mtk: $(PRODUCT_OUT)/recovery_kernel.mtk.header
+	$(call pretty,"Adding MTK header to recovery kernel.")
+	cat $(PRODUCT_OUT)/recovery_kernel.mtk.header $(recovery_kernel) > $@
+
+$(recovery_ramdisk).mtk.header: $(recovery_ramdisk)
+	size=$$($(call get-file-size,$(recovery_ramdisk))); \
+		$(call make_header, $$((size)), "RECOVERY", $@)
+$(recovery_ramdisk).mtk:  $(MKBOOTIMG) $(recovery_ramdisk).mtk.header
+	$(call pretty,"Adding MTK header to recovery ramdisk.")
+	cat $(recovery_ramdisk).mtk.header $(recovery_ramdisk) > $@
+
+INTERNAL_MTK_BOOTIMAGE_ARGS := \
+		--kernel $(INSTALLED_KERNEL_TARGET).mtk \
+		--ramdisk $(INSTALLED_RAMDISK_TARGET).mtk
+
+$(INSTALLED_BOOTIMAGE_TARGET): $(MKBOOTIMG)\
+		$(INSTALLED_RAMDISK_TARGET).mtk $(INSTALLED_KERNEL_TARGET).mtk
+	$(call pretty,"Target boot image: $@")
+	$(MKBOOTIMG) $(INTERNAL_MTK_BOOTIMAGE_ARGS) $(BOARD_MKBOOTIMG_ARGS) \
+		--output $@
+	$(hide) $(call assert-max-image-size,$@, \
+		$(BOARD_BOOTIMAGE_PARTITION_SIZE),raw)
+	@echo -e ${CL_CYN}"Made boot image: $@"${CL_RST}
+
+INTERNAL_MTK_RECOVERYIMAGE_ARGS := \
+		--kernel $(INSTALLED_KERNEL_TARGET).mtk \
+		--ramdisk $(recovery_ramdisk).mtk
+
+$(INSTALLED_RECOVERYIMAGE_TARGET): $(MKBOOTIMG) \
+		$(recovery_ramdisk).mtk $(INSTALLED_KERNEL_TARGET).mtk
+	@echo -e ${CL_CYN}"----- Making recovery image ------"${CL_RST}
+	$(MKBOOTIMG) $(INTERNAL_MTK_RECOVERYIMAGE_ARGS) \
+		$(BOARD_MKBOOTIMG_ARGS) --output $@
+	$(hide) $(call assert-max-image-size,$@, \
+		$(BOARD_RECOVERYIMAGE_PARTITION_SIZE),raw)
+	@echo -e ${CL_CYN}"Made recovery image: $@"${CL_RST}