# Refer to the README file to understand how Fedora on RISC-V is
# bootstrapped.

all: stage1 stage2 stage3 stage4

# Stage 1

stage1: stage1-riscv-qemu/riscv-qemu-94f5eb73.tar.gz \
	stamp-riscv-qemu-installed

stage1-riscv-qemu/riscv-qemu-94f5eb73.tar.gz:
	rm -f $@ $@-t
	wget -O $@-t 'https://github.com/riscv/riscv-qemu/archive/94f5eb73091fb4fe272db3e943f173ecc0f78ffd/riscv-qemu-94f5eb73.tar.gz'
	mv $@-t $@

stamp-riscv-qemu-installed:
	rm -f $@
	@rpm -q riscv-qemu >/dev/null || { \
	  echo "ERROR: You must install riscv-qemu:"; \
	  echo; \
	  echo "       dnf copr enable rjones/riscv"; \
	  echo "       dnf install riscv-qemu"; \
	  echo; \
	  echo "OR: you can build it yourself from the stage1-riscv-qemu directory."; \
	  echo; \
	  exit 1; \
	}
	@qemu-system-riscv --version || { \
	  echo "ERROR: qemu-system-riscv is not working."; \
	  echo "Make sure you installed the riscv-qemu package."; \
	  exit 1; \
	}
	touch $@

# Stage 2

stage2: stage2-riscv-gnu-toolchain/riscv-gnu-toolchain-1374381e.tar.gz \
	stage2-riscv-gnu-toolchain/binutils-2.26.tar.gz \
	stage2-riscv-gnu-toolchain/gcc-6.1.0.tar.gz \
	stage2-riscv-gnu-toolchain/glibc-2.23.tar.gz \
	stage2-riscv-gnu-toolchain/newlib-2.2.0.tar.gz \
	stamp-riscv-gnu-toolchain-installed \
	stage2-riscv-pk/riscv-pk-927979c5.tar.gz \
	stamp-riscv-pk-installed

stage2-riscv-gnu-toolchain/riscv-gnu-toolchain-1374381e.tar.gz:
	rm -f $@ $@-t
	wget -O $@-t https://github.com/lowRISC/riscv-gnu-toolchain/archive/1374381e01b30832581d65a56219388fe7d47584/riscv-gnu-toolchain-1374381e.tar.gz
	mv $@-t $@

stage2-riscv-gnu-toolchain/binutils-2.26.tar.gz:
	rm -f $@ $@-t
	wget -O $@-t http://mirrors.kernel.org/gnu/binutils/binutils-2.26.tar.gz
	mv $@-t $@

stage2-riscv-gnu-toolchain/gcc-6.1.0.tar.gz:
	rm -f $@ $@-t
	wget -O $@-t http://mirrors.kernel.org/gnu/gcc/gcc-6.1.0/gcc-6.1.0.tar.gz
	mv $@-t $@

stage2-riscv-gnu-toolchain/glibc-2.23.tar.gz:
	rm -f $@ $@-t
	wget -O $@-t http://mirrors.kernel.org/gnu/glibc/glibc-2.23.tar.gz
	mv $@-t $@

stage2-riscv-gnu-toolchain/newlib-2.2.0.tar.gz:
	rm -f $@ $@-t
	wget -O $@-t ftp://sourceware.org/pub/newlib/newlib-2.2.0.tar.gz
	mv $@-t $@

stamp-riscv-gnu-toolchain-installed:
	rm -f $@
	@rpm -q riscv-gnu-toolchain >/dev/null || { \
	  echo "ERROR: You must install riscv-gnu-toolchain:"; \
	  echo; \
	  echo "       dnf copr enable rjones/riscv"; \
	  echo "       dnf install riscv-gnu-toolchain"; \
	  echo; \
	  echo "OR: you can build it yourself from the stage2-riscv-gnu-toolchain directory."; \
	  echo; \
	  exit 1; \
	}
	@riscv64-unknown-elf-gcc --version || { \
	  echo "ERROR: riscv64-unknown-elf-gcc (cross compiler) is not working."; \
	  echo "Make sure you installed the riscv-gnu-toolchain package."; \
	  exit 1; \
	}
	touch $@

stage2-riscv-pk/riscv-pk-927979c5.tar.gz:
	rm -f $@ $@-t
	wget -O $@-t https://github.com/lowRISC/riscv-pk/archive/927979c5af6a69360b5dd61d3b17cd06ae73d1ac/riscv-pk-927979c5.tar.gz
	mv $@-t $@

stamp-riscv-pk-installed:
	rm -f $@
	@rpm -q riscv-pk >/dev/null || { \
	  echo "ERROR: You must install riscv-pk:"; \
	  echo; \
	  echo "       dnf copr enable rjones/riscv"; \
	  echo "       dnf install riscv-pk"; \
	  echo; \
	  echo "OR: you can build it yourself from the stage2-riscv-pk directory."; \
	  echo; \
	  exit 1; \
	}
	touch $@

# Stage 3

stage3: stage3-kernel/linux-4.6.2.tar.xz \
	stage3-kernel/linux-4.6.2/vmlinux

stage3-kernel/linux-4.6.2.tar.xz:
	rm -f $@ $@-t
	wget -O $@-t https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.6.2.tar.xz
	mv $@-t $@

stage3-kernel/linux-4.6.2/vmlinux:
	rm -rf stage3-kernel/linux-4.6.2
	cat stage3-kernel/linux-4.6.2.tar.xz | tar -x --xz -C stage3-kernel
	cd stage3-kernel/linux-4.6.2 && \
	git init
	cd stage3-kernel/linux-4.6.2 && \
	git remote add origin https://github.com/lowrisc/riscv-linux.git
	cd stage3-kernel/linux-4.6.2 && \
	git fetch
	cd stage3-kernel/linux-4.6.2 && \
	git checkout -f -t origin/debug-v0.3
	cd stage3-kernel/linux-4.6.2 && \
	patch -p1 < spi_sd_power_hack.patch
	cd stage3-kernel/linux-4.6.2 && \
	make ARCH=riscv defconfig
	cd stage3-kernel/linux-4.6.2 && \
	make ARCH=riscv CONFIG_CROSS_COMPILE=riscv64-unknown-elf- vmlinux
	ls -l $@

# Stage 4

stage4:
	echo "XXX TO DO"
	exit 1

.NOTPARALLEL: