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130 lines
3.9 KiB
130 lines
3.9 KiB
# SPDX-License-Identifier: GPL-2.0 |
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# |
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# Author: Huacai Chen <[email protected]> |
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# Copyright (C) 2020-2022 Loongson Technology Corporation Limited |
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boot := arch/loongarch/boot |
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KBUILD_DEFCONFIG := loongson3_defconfig |
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image-name-y := vmlinux |
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image-name-$(CONFIG_EFI_ZBOOT) := vmlinuz |
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ifndef CONFIG_EFI_STUB |
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KBUILD_IMAGE := $(boot)/vmlinux.elf |
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else |
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KBUILD_IMAGE := $(boot)/$(image-name-y).efi |
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endif |
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# |
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# Select the object file format to substitute into the linker script. |
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# |
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64bit-tool-archpref = loongarch64 |
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32bit-bfd = elf32-loongarch |
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64bit-bfd = elf64-loongarch |
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32bit-emul = elf32loongarch |
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64bit-emul = elf64loongarch |
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ifdef CONFIG_64BIT |
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tool-archpref = $(64bit-tool-archpref) |
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UTS_MACHINE := loongarch64 |
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endif |
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ifneq ($(SUBARCH),$(ARCH)) |
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ifeq ($(CROSS_COMPILE),) |
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CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) |
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endif |
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endif |
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ifdef CONFIG_64BIT |
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ld-emul = $(64bit-emul) |
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cflags-y += -mabi=lp64s |
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endif |
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cflags-y += -G0 -pipe -msoft-float |
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LDFLAGS_vmlinux += -G0 -static -n -nostdlib |
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# When the assembler supports explicit relocation hint, we must use it. |
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# GCC may have -mexplicit-relocs off by default if it was built with an old |
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# assembler, so we force it via an option. |
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# |
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# When the assembler does not supports explicit relocation hint, we can't use |
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# it. Disable it if the compiler supports it. |
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# |
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# If you've seen "unknown reloc hint" message building the kernel and you are |
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# now wondering why "-mexplicit-relocs" is not wrapped with cc-option: the |
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# combination of a "new" assembler and "old" compiler is not supported. Either |
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# upgrade the compiler or downgrade the assembler. |
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ifdef CONFIG_AS_HAS_EXPLICIT_RELOCS |
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cflags-y += -mexplicit-relocs |
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KBUILD_CFLAGS_KERNEL += -mdirect-extern-access |
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else |
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cflags-y += $(call cc-option,-mno-explicit-relocs) |
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KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel |
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KBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel |
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KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs |
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KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs |
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endif |
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cflags-y += -ffreestanding |
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cflags-y += $(call cc-option, -mno-check-zero-division) |
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ifndef CONFIG_PHYSICAL_START |
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load-y = 0x9000000000200000 |
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else |
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load-y = $(CONFIG_PHYSICAL_START) |
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endif |
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bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) |
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drivers-$(CONFIG_PCI) += arch/loongarch/pci/ |
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KBUILD_AFLAGS += $(cflags-y) |
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KBUILD_CFLAGS += $(cflags-y) |
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KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) |
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# This is required to get dwarf unwinding tables into .debug_frame |
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# instead of .eh_frame so we don't discard them. |
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables |
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# Don't emit unaligned accesses. |
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# Not all LoongArch cores support unaligned access, and as kernel we can't |
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# rely on others to provide emulation for these accesses. |
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KBUILD_CFLAGS += $(call cc-option,-mstrict-align) |
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KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include) |
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KBUILD_LDFLAGS += -m $(ld-emul) |
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ifdef CONFIG_LOONGARCH |
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CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ |
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grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ |
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sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') |
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endif |
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libs-y += arch/loongarch/lib/ |
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libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
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ifeq ($(KBUILD_EXTMOD),) |
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prepare: vdso_prepare |
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vdso_prepare: prepare0 |
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$(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h |
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endif |
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PHONY += vdso_install |
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vdso_install: |
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$(Q)$(MAKE) $(build)=arch/loongarch/vdso $@ |
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all: $(notdir $(KBUILD_IMAGE)) |
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vmlinux.elf vmlinux.efi vmlinuz.efi: vmlinux |
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$(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $(boot)/$@ |
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install: |
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$(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/$(image-name-y)-$(KERNELRELEASE) |
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$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) |
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$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) |
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define archhelp |
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echo ' install - install kernel into $(INSTALL_PATH)' |
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echo |
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endef
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