diff options
Diffstat (limited to 'arch/loongarch/Makefile')
| -rw-r--r-- | arch/loongarch/Makefile | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile new file mode 100644 index 000000000000..f4cb54d5afd6 --- /dev/null +++ b/arch/loongarch/Makefile @@ -0,0 +1,130 @@ +# 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 + +image-name-y := vmlinux +image-name-$(CONFIG_EFI_ZBOOT) := vmlinuz + +ifndef CONFIG_EFI_STUB +KBUILD_IMAGE := $(boot)/vmlinux.elf +else +KBUILD_IMAGE := $(boot)/$(image-name-y).efi +endif + +# +# 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 + +# When the assembler supports explicit relocation hint, we must use it. +# GCC may have -mexplicit-relocs off by default if it was built with an old +# assembler, so we force it via an option. +# +# When the assembler does not supports explicit relocation hint, we can't use +# it. Disable it if the compiler supports it. +# +# If you've seen "unknown reloc hint" message building the kernel and you are +# now wondering why "-mexplicit-relocs" is not wrapped with cc-option: the +# combination of a "new" assembler and "old" compiler is not supported. Either +# upgrade the compiler or downgrade the assembler. +ifdef CONFIG_AS_HAS_EXPLICIT_RELOCS +cflags-y += -mexplicit-relocs +KBUILD_CFLAGS_KERNEL += -mdirect-extern-access +else +cflags-y += $(call cc-option,-mno-explicit-relocs) +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 +endif + +cflags-y += -ffreestanding +cflags-y += $(call cc-option, -mno-check-zero-division) + +ifndef CONFIG_PHYSICAL_START +load-y = 0x9000000000200000 +else +load-y = $(CONFIG_PHYSICAL_START) +endif +bootvars-y = VMLINUX_LOAD_ADDRESS=$(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 + +libs-y += arch/loongarch/lib/ +libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a + +ifeq ($(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: $(notdir $(KBUILD_IMAGE)) + +vmlinux.elf vmlinux.efi vmlinuz.efi: vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $(boot)/$@ + +install: + $(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/$(image-name-y)-$(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 |