# RISCV should either be unset, or set to point to a directory that contains # a toolchain install tree that was built via other means. RISCV ?= $(CURDIR)/toolchain PATH := $(RISCV)/bin:$(PATH) ISA ?= rv64imafdc ABI ?= lp64d srcdir := $(dir $(realpath $(lastword $(MAKEFILE_LIST)))) srcdir := $(srcdir:/=) confdir := $(srcdir)/conf wrkdir := $(CURDIR)/work toolchain_srcdir := $(srcdir)/riscv-gnu-toolchain toolchain_wrkdir := $(wrkdir)/riscv-gnu-toolchain toolchain_dest := $(CURDIR)/toolchain buildroot_srcdir := $(srcdir)/buildroot buildroot_initramfs_wrkdir := $(wrkdir)/buildroot_initramfs buildroot_initramfs_tar := $(buildroot_initramfs_wrkdir)/images/rootfs.tar buildroot_initramfs_config := $(confdir)/buildroot_initramfs_config buildroot_initramfs_sysroot_stamp := $(wrkdir)/.buildroot_initramfs_sysroot buildroot_initramfs_sysroot := $(wrkdir)/buildroot_initramfs_sysroot buildroot_rootfs_wrkdir := $(wrkdir)/buildroot_rootfs buildroot_rootfs_ext := $(buildroot_rootfs_wrkdir)/images/rootfs.ext4 buildroot_rootfs_config := $(confdir)/buildroot_rootfs_config linux_srcdir := $(srcdir)/linux linux_wrkdir := $(wrkdir)/linux linux_defconfig := $(confdir)/linux_defconfig vmlinux := $(linux_wrkdir)/vmlinux vmlinux_stripped := $(linux_wrkdir)/vmlinux-stripped pk_srcdir := $(srcdir)/riscv-pk pk_wrkdir := $(wrkdir)/riscv-pk bbl := $(pk_wrkdir)/bbl bin := $(wrkdir)/bbl.bin hex := $(wrkdir)/bbl.hex fesvr_srcdir := $(srcdir)/riscv-fesvr fesvr_wrkdir := $(wrkdir)/riscv-fesvr libfesvr := $(fesvr_wrkdir)/prefix/lib/libfesvr.so spike_srcdir := $(srcdir)/riscv-isa-sim spike_wrkdir := $(wrkdir)/riscv-isa-sim spike := $(spike_wrkdir)/prefix/bin/spike qemu_srcdir := $(srcdir)/riscv-qemu qemu_wrkdir := $(wrkdir)/riscv-qemu qemu := $(qemu_wrkdir)/prefix/bin/qemu-system-riscv64 rootfs := $(wrkdir)/rootfs.bin target := riscv64-unknown-linux-gnu .PHONY: all all: $(hex) @echo @echo "This image has been generated for an ISA of $(ISA) and an ABI of $(ABI)" @echo "Find the image in work/bbl.bin, which should be written to a boot partition" @echo @echo "To completely erase, reformat, and program a disk sdX, run:" @echo " sudo make DISK=/dev/sdX format-boot-loader" @echo " ... you will need gdisk and e2fsprogs installed" @echo ifneq ($(RISCV),$(toolchain_dest)) $(RISCV)/bin/$(target)-gcc: $(error The RISCV environment variable was set, but is not pointing at a toolchain install tree) endif $(toolchain_dest)/bin/$(target)-gcc: $(toolchain_srcdir) mkdir -p $(toolchain_wrkdir) $(MAKE) -C $(linux_srcdir) O=$(dir $<) ARCH=riscv INSTALL_HDR_PATH=$(abspath $(toolchain_srcdir)/linux-headers) headers_install cd $(toolchain_wrkdir); $(toolchain_srcdir)/configure \ --prefix=$(toolchain_dest) \ --with-arch=$(ISA) \ --with-abi=$(ABI) \ --enable-linux $(MAKE) -C $(toolchain_wrkdir) sed 's/^#define LINUX_VERSION_CODE.*/#define LINUX_VERSION_CODE 263682/' -i $(toolchain_dest)/sysroot/usr/include/linux/version.h $(buildroot_initramfs_wrkdir)/.config: $(buildroot_srcdir) rm -rf $(dir $@) mkdir -p $(dir $@) cp $(buildroot_initramfs_config) $@ $(MAKE) -C $< RISCV=$(RISCV) PATH=$(PATH) O=$(buildroot_initramfs_wrkdir) olddefconfig $(buildroot_initramfs_tar): $(buildroot_srcdir) $(buildroot_initramfs_wrkdir)/.config $(RISCV)/bin/$(target)-gcc $(buildroot_initramfs_config) $(MAKE) -C $< RISCV=$(RISCV) PATH=$(PATH) O=$(buildroot_initramfs_wrkdir) .PHONY: buildroot_initramfs-menuconfig buildroot_initramfs-menuconfig: $(buildroot_initramfs_wrkdir)/.config $(buildroot_srcdir) $(MAKE) -C $(dir $<) O=$(buildroot_initramfs_wrkdir) menuconfig $(MAKE) -C $(dir $<) O=$(buildroot_initramfs_wrkdir) savedefconfig cp $(dir $<)/defconfig conf/buildroot_initramfs_config $(buildroot_rootfs_wrkdir)/.config: $(buildroot_srcdir) rm -rf $(dir $@) mkdir -p $(dir $@) cp $(buildroot_rootfs_config) $@ $(MAKE) -C $< RISCV=$(RISCV) PATH=$(PATH) O=$(buildroot_rootfs_wrkdir) olddefconfig $(buildroot_rootfs_ext): $(buildroot_srcdir) $(buildroot_rootfs_wrkdir)/.config $(RISCV)/bin/$(target)-gcc $(buildroot_rootfs_config) $(MAKE) -C $< RISCV=$(RISCV) PATH=$(PATH) O=$(buildroot_rootfs_wrkdir) .PHONY: buildroot_rootfs-menuconfig buildroot_rootfs-menuconfig: $(buildroot_rootfs_wrkdir)/.config $(buildroot_srcdir) $(MAKE) -C $(dir $<) O=$(buildroot_rootfs_wrkdir) menuconfig $(MAKE) -C $(dir $<) O=$(buildroot_rootfs_wrkdir) savedefconfig cp $(dir $<)/defconfig conf/buildroot_rootfs_config $(buildroot_initramfs_sysroot_stamp): $(buildroot_initramfs_tar) mkdir -p $(buildroot_initramfs_sysroot) tar -xpf $< -C $(buildroot_initramfs_sysroot) --exclude ./dev --exclude ./usr/share/locale touch $@ $(linux_wrkdir)/.config: $(linux_defconfig) $(linux_srcdir) mkdir -p $(dir $@) cp -p $< $@ $(MAKE) -C $(linux_srcdir) O=$(linux_wrkdir) ARCH=riscv olddefconfig echo $(ISA) echo $(filter rv32%,$(ISA)) ifeq (,$(filter rv%c,$(ISA))) sed 's/^.*CONFIG_RISCV_ISA_C.*$$/CONFIG_RISCV_ISA_C=n/' -i $@ $(MAKE) -C $(linux_srcdir) O=$(linux_wrkdir) ARCH=riscv olddefconfig endif ifeq ($(ISA),$(filter rv32%,$(ISA))) sed 's/^.*CONFIG_ARCH_RV32I.*$$/CONFIG_ARCH_RV32I=y/' -i $@ sed 's/^.*CONFIG_ARCH_RV64I.*$$/CONFIG_ARCH_RV64I=n/' -i $@ $(MAKE) -C $(linux_srcdir) O=$(linux_wrkdir) ARCH=riscv olddefconfig endif $(vmlinux): $(linux_srcdir) $(linux_wrkdir)/.config $(buildroot_initramfs_sysroot_stamp) $(MAKE) -C $< O=$(linux_wrkdir) \ CONFIG_INITRAMFS_SOURCE="$(confdir)/initramfs.txt $(buildroot_initramfs_sysroot)" \ CONFIG_INITRAMFS_ROOT_UID=$(shell id -u) \ CONFIG_INITRAMFS_ROOT_GID=$(shell id -g) \ ARCH=riscv \ vmlinux $(vmlinux_stripped): $(vmlinux) $(target)-strip -o $@ $< .PHONY: linux-menuconfig linux-menuconfig: $(linux_wrkdir)/.config $(MAKE) -C $(linux_srcdir) O=$(dir $<) ARCH=riscv menuconfig $(MAKE) -C $(linux_srcdir) O=$(dir $<) ARCH=riscv savedefconfig cp $(dir $<)/defconfig conf/linux_defconfig $(bbl): $(pk_srcdir) $(vmlinux_stripped) rm -rf $(pk_wrkdir) mkdir -p $(pk_wrkdir) cd $(pk_wrkdir) && $ $@ $(libfesvr): $(fesvr_srcdir) rm -rf $(fesvr_wrkdir) mkdir -p $(fesvr_wrkdir) mkdir -p $(dir $@) cd $(fesvr_wrkdir) && $