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Commit 44d3b73c authored by Atanas Filipov's avatar Atanas Filipov Committed by Gerrit - the friendly Code Review server
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arm64: msm: Add support for uncompressed kernel image 



The LK bootloader checks for a 20 byte header in the
kernel image to determine if the kernel is uncompressed
with an attached device tree.

Add support to choose between compressed/uncompressed image

Change-Id: I62229187e1f3e0ec11ff4b5a31c36dcee86dc8b7
Signed-off-by: default avatarAtanas Filipov <afilipov@codeaurora.org>
parent 4f11fdea

arch/arm64/Kconfig

+26 −1
Original line number Diff line number Diff line
@@ -958,7 +958,32 @@ config BUILD_ARM64_APPENDED_DTB_IMAGE_NAMES 
	depends on BUILD_ARM64_APPENDED_DTB_IMAGE

	help

	  Space separated list of names of dtbs to append when

	  building a concatenated Image.gz-dtb.

	  building a concatenated Image.gz-dtb



choice

	prompt "Kernel compression method"

	default BUILD_ARM64_KERNEL_COMPRESSION_GZIP

	help

	  Allows choice between gzip compressed or uncompressed

	  kernel image



config BUILD_ARM64_KERNEL_COMPRESSION_GZIP

	bool "Build compressed kernel image"

	help

	  Build a kernel image using gzip

	  compression with concatenated dtb.

	  gzip is based on the DEFLATE

	  algorithm.



config BUILD_ARM64_UNCOMPRESSED_KERNEL

	bool "Build uncompressed kernel image"

	help

	  Build a kernel image without

	  compression and with

	  concatenated dtb.



endchoice





config DMI

	bool "Enable support for SMBIOS (DMI) tables"

arch/arm64/Makefile

+10 −4
Original line number Diff line number Diff line
@@ -64,11 +64,14 @@ core-$(CONFIG_CRYPTO) += arch/arm64/crypto/ 
libs-y		:= arch/arm64/lib/ $(libs-y)

libs-$(CONFIG_EFI_STUB) += drivers/firmware/efi/libstub/



# Default target when executing plain make

ifeq ($(CONFIG_BUILD_ARM64_APPENDED_DTB_IMAGE),y)

KBUILD_IMAGE	:= Image.gz-dtb

else

ifeq ($(CONFIG_BUILD_ARM64_KERNEL_COMPRESSION_GZIP),y)

KBUILD_IMAGE   := Image.gz

else

KBUILD_IMAGE   := Image

endif



ifeq ($(CONFIG_BUILD_ARM64_APPENDED_DTB_IMAGE),y)

KBUILD_IMAGE   := $(addsuffix -dtb,$(KBUILD_IMAGE))

endif



KBUILD_DTBS	:= dtbs
@@ -97,6 +100,9 @@ dtbs_install: 
Image.gz-dtb: vmlinux scripts dtbs

	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@



Image-dtb: vmlinux scripts dtbs

	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@



PHONY += vdso_install

vdso_install:

	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@

arch/arm64/boot/Makefile

+7 −0
Original line number Diff line number Diff line
@@ -35,6 +35,13 @@ $(obj)/Image.gz: $(obj)/Image FORCE 
$(obj)/Image.gz-dtb: $(obj)/Image.gz $(DTB_OBJS) FORCE

	$(call if_changed,cat)



$(obj)/Image-dtb-hdr: $(obj)/Image FORCE

	echo -n 'UNCOMPRESSED_IMG' > $@ && \

	$(call size_append, $(filter-out FORCE,$^)) >> $@



$(obj)/Image-dtb: $(obj)/Image-dtb-hdr $(obj)/Image $(DTB_OBJS) FORCE

	$(call if_changed,cat)



install: $(obj)/Image

	$(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \

	$(obj)/Image System.map "$(INSTALL_PATH)"