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## This file is part of the coreboot project.
##
## Copyright (C) 2017 Facebook Inc.
## Copyright (C) 2018 9elements Cyber Security
##
## SPDX-License-Identifier: GPL-2.0-only
project_dir=linuxboot
kernel_dir=$(project_dir)/kernel
unexport $(COREBOOT_EXPORTS)
all: linuxboot
u-root:
$(MAKE) -f targets/u-root.mk
ifeq ($(CONFIG_LINUXBOOT_BUILD_INITRAMFS),y)
ifeq ($(CONFIG_LINUXBOOT_UROOT),y)
initramfs: u-root
endif
else
ifneq ($(CONFIG_LINUXBOOT_INITRAMFS),)
initramfs:
if [[ ! -f "$(top)/$(CONFIG_LINUXBOOT_INITRAMFS)" ]]; then \
echo "<< Linux initramfs '$(CONFIG_LINUXBOOT_INITRAMFS)' is missing. >>"; \
exit 1; \
fi
endif
endif
initramfs_compressed: initramfs
ifeq ($(CONFIG_LINUXBOOT_INITRAMFS_COMPRESSION_XZ),y)
xz --keep --force --check=crc32 --lzma2=dict=1MiB $(top)/$(CONFIG_LINUXBOOT_INITRAMFS)
endif
ifeq ($(CONFIG_LINUXBOOT_COMPILE_KERNEL),y)
ifeq ($(CONFIG_LINUXBOOT_ARCH),arm64)
kernel: initramfs
if [[ ! -f "$(top)/$(CONFIG_LINUXBOOT_DTB_FILE)" ]]; then \
echo "<< Linux kernel devicetree is missing. >>"; \
exit 1; \
fi
$(MAKE) -f targets/linux.mk
else
kernel:
$(MAKE) -f targets/linux.mk
endif
else
kernel:
if [[ ! -f "$(top)/$(CONFIG_LINUXBOOT_KERNEL)" ]]; then \
echo "<< Linux kernel '$(CONFIG_LINUXBOOT_KERNEL)' is missing. >>"; \
exit 1; \
fi
endif
linuxboot: kernel initramfs_compressed
clean:
if [ -d "$(kernel_dir)" ]; then rm -rf $(kernel_dir); fi
rm -f $(project_dir)/u-root
rm -f $(project_dir)/initramfs*
distclean:
rm -rf $(project_dir)
.PHONY: linuxboot kernel initramfs_compressed initramfs u-root clean distclean
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