| # SPDX-License-Identifier: GPL-2.0 | |
| # | |
| # Author: Huacai Chen <chenhuacai@loongson.cn> | |
| # Copyright (C) 2020-2022 Loongson Technology Corporation Limited | |
| boot := arch/loongarch/boot | |
| KBUILD_DEFCONFIG := loongson3_defconfig | |
| KBUILD_IMAGE = $(boot)/vmlinux | |
| # | |
| # Select the object file format to substitute into the linker script. | |
| # | |
| 64bit-tool-archpref = loongarch64 | |
| 32bit-bfd = elf32-loongarch | |
| 64bit-bfd = elf64-loongarch | |
| 32bit-emul = elf32loongarch | |
| 64bit-emul = elf64loongarch | |
| ifdef CONFIG_64BIT | |
| tool-archpref = $(64bit-tool-archpref) | |
| UTS_MACHINE := loongarch64 | |
| endif | |
| ifneq ($(SUBARCH),$(ARCH)) | |
| ifeq ($(CROSS_COMPILE),) | |
| CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) | |
| endif | |
| endif | |
| ifdef CONFIG_64BIT | |
| ld-emul = $(64bit-emul) | |
| cflags-y += -mabi=lp64s | |
| endif | |
| cflags-y += -G0 -pipe -msoft-float | |
| LDFLAGS_vmlinux += -G0 -static -n -nostdlib | |
| KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel | |
| KBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel | |
| KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs | |
| KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs | |
| cflags-y += -ffreestanding | |
| cflags-y += $(call cc-option, -mno-check-zero-division) | |
| load-y = 0x9000000000200000 | |
| bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) | |
| drivers-$(CONFIG_PCI) += arch/loongarch/pci/ | |
| KBUILD_AFLAGS += $(cflags-y) | |
| KBUILD_CFLAGS += $(cflags-y) | |
| KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) | |
| # This is required to get dwarf unwinding tables into .debug_frame | |
| # instead of .eh_frame so we don't discard them. | |
| KBUILD_CFLAGS += -fno-asynchronous-unwind-tables | |
| # Don't emit unaligned accesses. | |
| # Not all LoongArch cores support unaligned access, and as kernel we can't | |
| # rely on others to provide emulation for these accesses. | |
| KBUILD_CFLAGS += $(call cc-option,-mstrict-align) | |
| KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include) | |
| KBUILD_LDFLAGS += -m $(ld-emul) | |
| ifdef CONFIG_LOONGARCH | |
| CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ | |
| egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ | |
| sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') | |
| endif | |
| head-y := arch/loongarch/kernel/head.o | |
| libs-y += arch/loongarch/lib/ | |
| ifeq ($(KBUILD_EXTMOD),) | |
| prepare: vdso_prepare | |
| vdso_prepare: prepare0 | |
| $(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h | |
| endif | |
| PHONY += vdso_install | |
| vdso_install: | |
| $(Q)$(MAKE) $(build)=arch/loongarch/vdso $@ | |
| all: $(KBUILD_IMAGE) | |
| $(KBUILD_IMAGE): vmlinux | |
| $(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $@ | |
| install: | |
| $(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) | |
| $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) | |
| $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) | |
| define archhelp | |
| echo ' install - install kernel into $(INSTALL_PATH)' | |
| echo | |
| endef |