136 lines
4.5 KiB
Makefile
136 lines
4.5 KiB
Makefile
## This file is part of the coreboot project.
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##
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## Copyright (C) 2017 Facebook Inc.
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## Copyright (C) 2018 9elements Cyber Security
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; version 2 of the License.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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SHELL := /bin/bash
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ARCH-$(CONFIG_LINUXBOOT_X86_64)=x86_64
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ARCH-$(CONFIG_LINUXBOOT_X86)=x86
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ARCH-$(CONFIG_LINUXBOOT_ARM64)=arm64
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TAG-$(CONFIG_LINUXBOOT_KERNEL_MAINLINE)=mainline
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TAG-$(CONFIG_LINUXBOOT_KERNEL_STABLE)=stable
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TAG-$(CONFIG_LINUXBOOT_KERNEL_LONGTERM)=longterm
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pwd:=$(shell pwd)
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top:=../../..
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project_dir=linuxboot
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tarball_dir:=$(project_dir)/tarball
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decompress_flag=.done
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OBJCOPY:=$(LINUXBOOT_CROSS_COMPILE)objcopy
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KERNEL_MAKE_FLAGS = \
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ARCH=$(ARCH-y)
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ifeq ($(CONFIG_LINUXBOOT_KERNEL_CUSTOM),y)
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kernel_version:=$(CONFIG_LINUXBOOT_KERNEL_CUSTOM_VERSION)
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else
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kernel_version:=$(shell curl -sS -k https://www.kernel.org/feeds/kdist.xml | \
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sed -n -e 's@.*<guid isPermaLink="false">\(.*\)</guid>.*@\1@p' | \
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awk -F ',' '/$(TAG-y)/{ print $$3 }' | \
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head -n 1)
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endif
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kernel_dir=$(project_dir)/kernel-$(subst .,_,$(kernel_version))
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kernel_tarball=linux-$(kernel_version).tar
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kernel_mirror=https://mirrors.edge.kernel.org/pub/linux/kernel
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ifeq ($(findstring x2.6.,x$(kernel_version)),x2.6.)
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kernel_mirror_path := $(kernel_mirror)/v2.6
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else ifeq ($(findstring x3.,x$(kernel_version)),x3.)
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kernel_mirror_path := $(kernel_mirror)/v3.x
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else ifeq ($(findstring x4.,x$(kernel_version)),x4.)
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kernel_mirror_path := $(kernel_mirror)/v4.x
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else ifeq ($(findstring x5.,x$(kernel_version)),x5.)
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kernel_mirror_path := $(kernel_mirror)/v5.x
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endif
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all: kernel
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lookup:
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ifeq ($(kernel_version),)
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$(error kernel version lookup failed for $(TAG-y) release)
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endif
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@echo " WWW Kernel [$(TAG-y)] $(kernel_version)"
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fetch:
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ifneq ($(shell [[ -d "$(kernel_dir)" && -f "$(kernel_dir)/$(decompress_flag)" ]];echo $$?),0)
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mkdir -p $(tarball_dir)
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if [[ ! -f $(tarball_dir)/$(kernel_tarball).xz && ! -f $(tarball_dir)/$(kernel_tarball).xz ]]; then \
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echo " WWW $(kernel_tarball).xz"; \
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cd $(tarball_dir); \
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curl -OLSs "$(kernel_mirror_path)/$(kernel_tarball).xz"; \
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cd $(pwd); \
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fi
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endif
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unpack: fetch
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if [[ -d "$(kernel_dir)" && ! -f "$(kernel_dir)/$(decompress_flag)" ]]; then \
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rm -rf $(kernel_dir); \
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fi
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if [[ ! -d "$(kernel_dir)" ]]; then \
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mkdir $(kernel_dir); \
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echo " XZ $(kernel_tarball).xz"; \
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tar xJf $(tarball_dir)/$(kernel_tarball).xz --strip 1 -C $(kernel_dir); \
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fi
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touch $(kernel_dir)/$(decompress_flag)
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$(kernel_dir)/.config: unpack
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@echo " CONFIG Linux $(kernel_version)"
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ifeq ($(CONFIG_LINUXBOOT_KERNEL_CUSTOM_CONFIG),y)
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cp $(CONFIG_LINUXBOOT_KERNEL_CONFIGFILE) $(kernel_dir)/.config
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else
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cp $(ARCH-y)/defconfig $(kernel_dir)/.config
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endif
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$(MAKE) -C $(kernel_dir) $(KERNEL_MAKE_FLAGS) olddefconfig
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build: $(kernel_dir)/.config
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@echo " MAKE Linux $(kernel_version)"
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ifeq ($(CONFIG_LINUXBOOT_KERNEL_BZIMAGE),y)
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$(MAKE) -C $(kernel_dir) $(KERNEL_MAKE_FLAGS) CROSS_COMPILE=$(LINUXBOOT_CROSS_COMPILE) bzImage
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else
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ifeq ($(CONFIG_LINUXBOOT_KERNEL_UIMAGE),y)
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$(MAKE) -C $(kernel_dir) $(KERNEL_MAKE_FLAGS) CROSS_COMPILE=$(LINUXBOOT_CROSS_COMPILE) vmlinux
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endif
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endif
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ifeq ($(CONFIG_LINUXBOOT_KERNEL_BZIMAGE),y)
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$(top)/$(CONFIG_LINUXBOOT_KERNEL): build
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@echo " CP bzImage"
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cp $(kernel_dir)/arch/x86/boot/bzImage $@
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else
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ifeq ($(CONFIG_LINUXBOOT_KERNEL_UIMAGE),y)
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$(project_dir)/target.dtb: $(top)/$(CONFIG_LINUXBOOT_DTB_FILE)
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cp $< $@
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$(project_dir)/vmlinux.bin: $(kernel_dir)/vmlinux
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$(OBJCOPY) -O binary $< $@
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$(project_dir)/vmlinux.bin.lzma: $(project_dir)/vmlinux.bin
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xz -c -k -f --format=lzma --lzma1=dict=1MiB,lc=3,lp=0,pb=3 $< > $@
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$(top)/$(CONFIG_LINUXBOOT_KERNEL): build $(project_dir)/vmlinux.bin.lzma $(project_dir)/target.dtb
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cp $(project_dir)/../arm64/kernel_fdt_lzma.its $(project_dir)
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cp $(top)/$(CONFIG_LINUXBOOT_INITRAMFS)$(CONFIG_LINUXBOOT_INITRAMFS_SUFFIX) $(project_dir)/initramfs
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mkimage -f $(project_dir)/kernel_fdt_lzma.its $@
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else
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$(error Kernel image format not found)
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exit 1
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endif
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endif
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ifneq ($(TAG-y),)
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kernel: lookup $(top)/$(CONFIG_LINUXBOOT_KERNEL)
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else
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kernel: $(top)/$(CONFIG_LINUXBOOT_KERNEL)
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endif
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.PHONY: all kernel build unpack fetch check
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