| # 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 |
