| # 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_DTBS := dtbs |
| |
| 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_DYNAMIC_FTRACE |
| KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY |
| CC_FLAGS_FTRACE := -fpatchable-function-entry=2 |
| endif |
| |
| 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 += -pipe -msoft-float |
| LDFLAGS_vmlinux += -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. |
| # |
| # The combination of a "new" assembler and "old" GCC is not supported, given |
| # the rarity of this combo and the extra complexity needed to make it work. |
| # Either upgrade the compiler or downgrade the assembler; the build will error |
| # out if it is the case (by probing for the model attribute; all supported |
| # compilers in this case would have support). |
| # |
| # Also, -mdirect-extern-access is useful in case of building with explicit |
| # relocs, for avoiding unnecessary GOT accesses. It is harmless to not have |
| # support though. |
| ifdef CONFIG_AS_HAS_EXPLICIT_RELOCS |
| cflags-y += $(call cc-option,-mexplicit-relocs) |
| KBUILD_CFLAGS_KERNEL += $(call cc-option,-mdirect-extern-access) |
| KBUILD_CFLAGS_KERNEL += $(call cc-option,-fdirect-access-external-data) |
| KBUILD_AFLAGS_MODULE += $(call cc-option,-fno-direct-access-external-data) |
| KBUILD_CFLAGS_MODULE += $(call cc-option,-fno-direct-access-external-data) |
| KBUILD_AFLAGS_MODULE += $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax) |
| KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax) |
| else |
| cflags-y += $(call cc-option,-mno-explicit-relocs) |
| KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel |
| KBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel |
| KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs |
| KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs |
| endif |
| |
| KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json |
| KBUILD_RUSTFLAGS_MODULE += -Crelocation-model=pic |
| |
| ifeq ($(CONFIG_RELOCATABLE),y) |
| KBUILD_CFLAGS_KERNEL += -fPIE |
| KBUILD_RUSTFLAGS_KERNEL += -Crelocation-model=pie |
| LDFLAGS_vmlinux += -static -pie --no-dynamic-linker -z notext $(call ld-option, --apply-dynamic-relocs) |
| endif |
| |
| cflags-y += $(call cc-option, -mno-check-zero-division) |
| |
| ifndef CONFIG_KASAN |
| cflags-y += -fno-builtin-memcpy -fno-builtin-memmove -fno-builtin-memset |
| endif |
| |
| load-y = 0x9000000000200000 |
| bootvars-y = VMLINUX_LOAD_ADDRESS=$(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 |
| |
| ifdef CONFIG_ARCH_STRICT_ALIGN |
| # 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) |
| else |
| # Optimise for performance on hardware supports unaligned access. |
| KBUILD_CFLAGS += $(call cc-option,-mno-strict-align) |
| endif |
| |
| KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include) |
| |
| KBUILD_LDFLAGS += -m $(ld-emul) |
| |
| ifdef need-compiler |
| CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ |
| grep -E -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) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
| |
| drivers-y += arch/loongarch/crypto/ |
| |
| # suspend and hibernation support |
| drivers-$(CONFIG_PM) += arch/loongarch/power/ |
| |
| ifeq ($(KBUILD_EXTMOD),) |
| prepare: vdso_prepare |
| vdso_prepare: prepare0 |
| $(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h |
| endif |
| |
| vdso-install-y += arch/loongarch/vdso/vdso.so.dbg |
| |
| all: $(notdir $(KBUILD_IMAGE)) $(KBUILD_DTBS) |
| |
| vmlinuz.efi: vmlinux.efi |
| |
| 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 |
