payloads: Add LinuxBoot payload in u-root mode

* Add LinuxBoot support
* Add u-root mode
* Download kernel and u-root from upstream sources.
* Add customization options
* Clean kernel only if directory exists

Change-Id: I3a25ff6812e046acc688cbbb203cf262ad751659
Signed-off-by: Philipp Deppenwiese <zaolin@das-labor.org>
Reviewed-on: https://review.coreboot.org/23071
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 80 insertions, 0 deletions

diff --git a/payloads/external/LinuxBoot/targets/u-root.mk b/payloads/external/LinuxBoot/targets/u-root.mk
new file mode 100644
index 0000000000..9b0e5687d7
--- /dev/null
+++ b/payloads/external/LinuxBoot/targets/u-root.mk
@@ -0,0 +1,80 @@
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2017 Facebook Inc.
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; version 2 of the License.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+
+uroot_git_repo=https://github.com/u-root/u-root.git
+uroot_dir=$(project_dir)/go/src/github.com/u-root/u-root
+go_check=$(shell command -v go 1>/dev/null 2>&1 && echo go)
+project_dir=$(shell pwd)/linuxboot
+project_name=u-root
+go_path_dir=$(shell pwd)/linuxboot/go
+
+all: build
+
+check:
+ifneq ($(go_check),go)
+	printf "\n<<Please install Golang >= 1.9 for u-root mode>>\n\n"
+	exit 1
+endif
+	mkdir -p $(project_dir)/go/src/github.com/u-root
+
+$(uroot_dir)/.git:
+	echo "    Git        Cloning u-root $(CONFIG_LINUXBOOT_UROOT_VERSION)"
+	git clone $(uroot_git_repo) $(uroot_dir)
+
+fetch: check $(uroot_dir)/.git
+	-cd "$(uroot_dir)" && git fetch origin
+
+checkout: fetch
+	cd "$(uroot_dir)" && \
+	if ! git diff --quiet _cb_checkout "$(CONFIG_LINUXBOOT_UROOT_VERSION)" -- 2>/dev/null; \
+	then \
+		printf "    CHECKOUT    $(project_name) [$(CONFIG_LINUXBOOT_UROOT_VERSION)]\n"; \
+		git checkout $$(git rev-parse HEAD) >/dev/null 2>&1; \
+		git branch -f _cb_checkout "$(CONFIG_LINUXBOOT_UROOT_VERSION)" && \
+		git checkout _cb_checkout && \
+		$(if $(project_patches), \
+		for patch in $(project_patches); do \
+			printf "    PATCH       $$patch\n"; \
+			git am --keep-cr "$$patch" || \
+				( printf "Error when applying patches.\n"; \
+				  git am --abort; exit 1; ); \
+		done;,true;) \
+	fi
+
+$(project_dir)/initramfs.cpio.xz: checkout
+	cd $(uroot_dir); GOARCH=$(CONFIG_LINUXBOOT_ARCH) GOPATH=$(go_path_dir) go build u-root.go
+	echo "    MAKE       u-root $(CONFIG_LINUXBOOT_UROOT_VERSION)"
+ifneq ($(CONFIG_LINUXBOOT_UROOT_COMMANDS),)
+ifneq ($(CONFIG_LINUXBOOT_UROOT_FILES),)
+	cd $(uroot_dir); GOARCH=$(CONFIG_LINUXBOOT_ARCH) GOPATH=$(go_path_dir) ./u-root \
+	-build=bb -files $(CONFIG_LINUXBOOT_UROOT_FILES) -o $(project_dir)/initramfs.cpio \
+	./cmds/{$(CONFIG_LINUXBOOT_UROOT_COMMANDS)}
+else
+	cd $(uroot_dir); GOARCH=$(CONFIG_LINUXBOOT_ARCH) GOPATH=$(go_path_dir) ./u-root \
+	-build=bb -o $(project_dir)/initramfs.cpio ./cmds/{$(CONFIG_LINUXBOOT_UROOT_COMMANDS)}
+endif
+else
+ifneq ($(CONFIG_LINUXBOOT_UROOT_FILES),)
+	cd $(uroot_dir); GOARCH=$(CONFIG_LINUXBOOT_ARCH) GOPATH=$(go_path_dir) ./u-root \
+	-build=bb -files $(CONFIG_LINUXBOOT_UROOT_FILES) -o $(project_dir)/initramfs.cpio
+else
+	cd $(uroot_dir); GOARCH=$(CONFIG_LINUXBOOT_ARCH) GOPATH=$(go_path_dir) ./u-root \
+	-build=bb -o $(project_dir)/initramfs.cpio
+endif
+endif
+	xz -f --check=crc32 -9 --lzma2=dict=1MiB --threads=$(CPUS) $(project_dir)/initramfs.cpio
+
+build: $(project_dir)/initramfs.cpio.xz
+
+.PHONY: build checkout fetch all check