Add the seeed beaglev cpu.config and Makefile

Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>

mainboards/seeed/beaglev/Makefile

@@ -0,0 +1,187 @@
+# This is the makefile for a kernel, uboot image, and initramfs from u-root
+#
+# sshdkernel produces a kernel with a built-in initramfs for netboot
+# It provides (and starts) an sshd.
+# ssh -i class_key -p 2022 board date
+#
+# The cpu image uses a cpud as its init, and you
+# can cpu to it to run commands.
+# to flash the flash image.
+# e.g.
+# cpu board date
+# cpu is way more convenient than ssh/scp if you can learn it.
+# you can also just
+# cpu board
+# NOTE: those commands are running on the board, and they all work
+#
+# You can test the flash image kernel with qemu
+# make flashtest
+
+default: cpu
+	echo you can add any of these targets to the beaglev image.
+	echo as img/nerf. You can also set priority.
+
+flashtest: testflashkernel
+
+usefultargets:
+	echo fetch, sshdkernel, flashkernel, cpukernel, etc.
+
+sshdkernel: sshd.cpio.lzma sshd.config
+	cp sshd.config linux/.config
+	(cd linux && make oldconfig && make -j32)
+	cp linux/arch/x86/boot/bzImage $@
+
+cpu: cpukernel u-boot.bin u-boot.dtb cpu.cpio.lzma
+	echo Now copy these things to the stick.
+
+cpukernel: cpu.config Makefile
+	cp cpu.config linux/.config
+	(cd linux && make CROSS_COMPILE=riscv64-linux-gnu- ARCH=riscv -j4 oldconfig && make CROSS_COMPILE=riscv64-linux-gnu- ARCH=riscv -j4 && mkdir -p boot && make CROSS_COMPILE=riscv64-linux-gnu- ARCH=riscv INSTALL_PATH=boot zinstall)
+	cp linux/arch/riscv/boot/Image.gz .
+
+readrom:
+	echo You need to get a ROM image from *somewhere*
+	echo Once you do, put it in ROM.bin
+
+u-boot.bin: ubootconfig
+	(cd uboot && make CROSS_COMPILE=riscv64-linux-gnu- ARCH=riscv u-boot.bin)
+	cp uboot/u-boot.bin $@
+
+u-boot.dtb: ubootconfig
+	(cd uboot && make CROSS_COMPILE=riscv64-linux-gnu- ARCH=riscv u-boot.dtb)
+	cp uboot/u-boot.dtb $@
+
+ubootconfig: Makefile
+	echo This is idempotent
+	sed -i 's/CONFIG_SYS_TEXT_BASE=.*/CONFIG_SYS_TEXT_BASE=0x80020000/p' uboot/configs/starfive_vic7100_beagle_v_smode_defconfig
+	(cd uboot && make CROSS_COMPILE=riscv64-linux-gnu- ARCH=riscv starfive_vic7100_beagle_v_smode_defconfig)
+
+writerom: image.bin
+	echo Here is where you would do the flashrom, e.g.
+	echo and maybe a cbfstool
+	echo cbfstool beaglev.rom remove -n img/nerf
+	echo cbfstool beaglev.rom add-payload -n img/nerf -f cpukernel
+	echo sudo flashrom -p internal -w image.bin
+
+flashinitramfs.cpio.lzma: flashinitramfs.cpio
+	lzma -f -k $<
+
+flashinitramfs.cpio: Makefile
+	go run github.com/u-root/u-root  -o $@ -build=bb \
+		-uinitcmd=/bbin/pxeboot \
+		github.com/u-root/u-root/cmds/boot/pxeboot \
+		github.com/u-root/u-root/cmds/core/cat \
+		github.com/u-root/u-root/cmds/core/elvish \
+		github.com/u-root/u-root/cmds/core/init \
+		github.com/u-root/u-root/cmds/core/ip \
+		github.com/u-root/u-root/cmds/core/ls \
+		github.com/u-root/u-root/cmds/core/kexec \
+		github.com/u-root/u-root/cmds/core/pci \
+		github.com/u-root/u-root/cmds/core/wget \
+
+# this target builds an initramfs with only one program, the cpu server.
+# It depends on the kernel setting the IP address.
+# You need ip=dhcp OR ip=fixed.ip.address.here in the command line
+cpu.cpio.lzma: Makefile
+	go run github.com/u-root/u-root -o cpu.cpio -build=bb -initcmd=cpud -files ~/.ssh/cpu_rsa.pub:key.pub \
+		-defaultsh="" \
+		github.com/u-root/cpu/cmds/cpud
+	lzma -f -k cpu.cpio
+
+# this target builds an initramfs with all of u-root, AND all of /bin, /usr/bin, /sbin, /usr/sbin, /etc
+# the intent is  to demonstrate the capability of http loading.
+# It depends on the kernel setting the IP address.
+# You need ip=dhcp OR ip=fixed.ip.address.here in the command line
+sshd.cpio.lzma:  Makefile
+	go run github.com/u-root/u-root -o sshd.cpio -build=bb \
+		-uinitcmd=/bbin/sshd \
+		-files class_key.pub:authorized_keys \
+		-files classhostkey:id_rsa \
+		-files /usr/bin/vi \
+		-files /usr/share/vim \
+		-files /usr/share/terminfo \
+		-files /bin/bash \
+		-files /usr/sbin/flashrom \
+		-files /usr/bin/xz \
+		all
+	lzma -f -k sshd.cpio
+	ls -l sshd.cpio.*
+
+flashkernel: flash.config flashinitramfs.cpio.lzma Makefile
+	cp $< linux/.config
+	(cd linux && make oldconfig && make -j32)
+	cp linux/arch/x86/boot/bzImage $@
+
+testflashkernel: flashkernel
+	qemu-system-x86_64 -kernel flashkernel -nographic -serial /dev/tty -initrd flashinitramfs.cpio.lzma
+
+testcpukernel: cpukernel
+	qemu-system-x86_64 -kernel cpukernel -nographic -serial /dev/tty
+
+# These stanzas fetch code.
+fetch: getkernel geturoot getrom getuboot
+
+getkernel:
+	rm -rf linux
+	git clone https://github.com/starfive-tech/beagle_kernel_5.10 linux
+	(cd linux && git checkout -b starfive origin/starfive)
+# fyi: make CROSS_COMPILE=riscv64-linux-gnu- ARCH=riscv starfive_vic7100_evb_sd_net_fedora_defconfig
+# Change to taste
+
+getrom:
+	echo you can use flashrom to read the beaglev image.
+
+geturoot:
+	go get -u github.com/u-root/u-root
+	go get -u github.com/u-root/cpu/...
+
+getuboot:
+	git clone https://github.com/starfive-tech/beagle_uboot-opensbi uboot
+
+packages:
+	echo this sucks.
+	sudo apt-get \
+		install \
+		autoconf \
+		automake \
+		autotools-dev \
+		bc \
+		bison \
+		build-essential \
+		curl \
+		flex \
+		gawk \
+		gdisk \
+		git \
+		gperf \
+		libgmp-dev \
+		libmpc-dev \
+		libmpfr-dev \
+		libncurses-dev \
+		libssl-dev \
+		libtool \
+		patchutils \
+		python \
+		screen \
+		texinfo \
+		unzip \
+		zlib1g-dev \
+		device-tree-compiler
+	sudo apt install gcc-riscv64-linux-gnu
+
+# Serve the combined sshd-kernel and sshd-initramfs image. This includes flashrom
+sshd-pxeserver:
+	echo Consider Disabling any system services ...
+	echo e.g. sudo systemctl  stop tftpd-hpa.service
+	echo e.g. sudo systemctl stop isc-dhcp-server
+	sudo `go env GOPATH`/bin/pxeserver  -tftp-dir . -bootfilename sshdkernel  -http-dir . -interface $(NETWORK)
+
+# Serve the combined cpu-kernel and cpu-initramfs image.
+cpu-pxeserver:
+	echo Consider Disabling any system services ...
+	echo e.g. sudo systemctl  stop tftpd-hpa.service
+	echo e.g. sudo systemctl stop isc-dhcp-server
+	sudo `go env GOPATH`/bin/pxeserver  -tftp-dir . -bootfilename cpukernel  -http-dir . -interface $(NETWORK)
+
+ssh:
+	ssh -i class_key -p 2022 root@up