# SPDX-License-Identifier: GPL-2.0 # # Author: Huacai Chen # 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 CC_FLAGS_FPU := -mfpu=64 CC_FLAGS_NO_FPU := -msoft-float ifdef CONFIG_UNWINDER_ORC orc_hash_h := arch/$(SRCARCH)/include/generated/asm/orc_hash.h orc_hash_sh := $(srctree)/scripts/orc_hash.sh targets += $(orc_hash_h) quiet_cmd_orc_hash = GEN $@ cmd_orc_hash = mkdir -p $(dir $@); \ $(CONFIG_SHELL) $(orc_hash_sh) < $< > $@ $(orc_hash_h): $(srctree)/arch/loongarch/include/asm/orc_types.h $(orc_hash_sh) FORCE $(call if_changed,orc_hash) archprepare: $(orc_hash_h) endif 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 $(CC_FLAGS_NO_FPU) 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) 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_AFLAGS += $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax) KBUILD_CFLAGS += $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax) KBUILD_AFLAGS += $(call cc-option,-mthin-add-sub) $(call cc-option,-Wa$(comma)-mthin-add-sub) KBUILD_CFLAGS += $(call cc-option,-mthin-add-sub) $(call cc-option,-Wa$(comma)-mthin-add-sub) ifdef CONFIG_OBJTOOL KBUILD_CFLAGS += -fno-jump-tables endif KBUILD_RUSTFLAGS += --target=loongarch64-unknown-none-softfloat KBUILD_RUSTFLAGS_KERNEL += -Zdirect-access-external-data=yes KBUILD_RUSTFLAGS_MODULE += -Zdirect-access-external-data=no 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