1fa96b57cSHuacai Chen# SPDX-License-Identifier: GPL-2.0 2fa96b57cSHuacai Chen# 3fa96b57cSHuacai Chen# Author: Huacai Chen <chenhuacai@loongson.cn> 4fa96b57cSHuacai Chen# Copyright (C) 2020-2022 Loongson Technology Corporation Limited 5fa96b57cSHuacai Chen 6fa96b57cSHuacai Chenboot := arch/loongarch/boot 7fa96b57cSHuacai Chen 89e8536e2SHuacai ChenKBUILD_DEFCONFIG := loongson3_defconfig 99e8536e2SHuacai Chen 10fa96b57cSHuacai ChenKBUILD_IMAGE = $(boot)/vmlinux 11fa96b57cSHuacai Chen 12fa96b57cSHuacai Chen# 13fa96b57cSHuacai Chen# Select the object file format to substitute into the linker script. 14fa96b57cSHuacai Chen# 15fa96b57cSHuacai Chen64bit-tool-archpref = loongarch64 16fa96b57cSHuacai Chen32bit-bfd = elf32-loongarch 17fa96b57cSHuacai Chen64bit-bfd = elf64-loongarch 18fa96b57cSHuacai Chen32bit-emul = elf32loongarch 19fa96b57cSHuacai Chen64bit-emul = elf64loongarch 20fa96b57cSHuacai Chen 21fa96b57cSHuacai Chenifdef CONFIG_64BIT 22fa96b57cSHuacai Chentool-archpref = $(64bit-tool-archpref) 23fa96b57cSHuacai ChenUTS_MACHINE := loongarch64 24fa96b57cSHuacai Chenendif 25fa96b57cSHuacai Chen 26fa96b57cSHuacai Chenifneq ($(SUBARCH),$(ARCH)) 27fa96b57cSHuacai Chen ifeq ($(CROSS_COMPILE),) 28fa96b57cSHuacai Chen CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) 29fa96b57cSHuacai Chen endif 30fa96b57cSHuacai Chenendif 31fa96b57cSHuacai Chen 32fa96b57cSHuacai Chenifdef CONFIG_64BIT 33fa96b57cSHuacai Chenld-emul = $(64bit-emul) 34fa96b57cSHuacai Chencflags-y += -mabi=lp64s 35fa96b57cSHuacai Chenendif 36fa96b57cSHuacai Chen 37fa96b57cSHuacai Chencflags-y += -G0 -pipe -msoft-float 38fa96b57cSHuacai ChenLDFLAGS_vmlinux += -G0 -static -n -nostdlib 39fa96b57cSHuacai ChenKBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel 40fa96b57cSHuacai ChenKBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel 41fa96b57cSHuacai ChenKBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs 42fa96b57cSHuacai ChenKBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs 43fa96b57cSHuacai Chen 44fa96b57cSHuacai Chencflags-y += -ffreestanding 45fa96b57cSHuacai Chencflags-y += $(call cc-option, -mno-check-zero-division) 46fa96b57cSHuacai Chen 47fa96b57cSHuacai Chenload-y = 0x9000000000200000 48fa96b57cSHuacai Chenbootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) 49fa96b57cSHuacai Chen 50*57fc7323SHuacai Chendrivers-$(CONFIG_PCI) += arch/loongarch/pci/ 51*57fc7323SHuacai Chen 52fa96b57cSHuacai ChenKBUILD_AFLAGS += $(cflags-y) 53fa96b57cSHuacai ChenKBUILD_CFLAGS += $(cflags-y) 54fa96b57cSHuacai ChenKBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) 55fa96b57cSHuacai Chen 56fa96b57cSHuacai Chen# This is required to get dwarf unwinding tables into .debug_frame 57fa96b57cSHuacai Chen# instead of .eh_frame so we don't discard them. 58fa96b57cSHuacai ChenKBUILD_CFLAGS += -fno-asynchronous-unwind-tables 59fa96b57cSHuacai Chen 60fa96b57cSHuacai Chen# Don't emit unaligned accesses. 61fa96b57cSHuacai Chen# Not all LoongArch cores support unaligned access, and as kernel we can't 62fa96b57cSHuacai Chen# rely on others to provide emulation for these accesses. 63fa96b57cSHuacai ChenKBUILD_CFLAGS += $(call cc-option,-mstrict-align) 64fa96b57cSHuacai Chen 65fa96b57cSHuacai ChenKBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include) 66fa96b57cSHuacai Chen 67fa96b57cSHuacai ChenKBUILD_LDFLAGS += -m $(ld-emul) 68fa96b57cSHuacai Chen 69fa96b57cSHuacai Chenifdef CONFIG_LOONGARCH 70fa96b57cSHuacai ChenCHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ 71fa96b57cSHuacai Chen egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ 72fa96b57cSHuacai Chen sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') 73fa96b57cSHuacai Chenendif 74fa96b57cSHuacai Chen 75fa96b57cSHuacai Chenhead-y := arch/loongarch/kernel/head.o 76fa96b57cSHuacai Chen 77fa96b57cSHuacai Chenlibs-y += arch/loongarch/lib/ 78fa96b57cSHuacai Chen 79fa96b57cSHuacai Chenifeq ($(KBUILD_EXTMOD),) 80fa96b57cSHuacai Chenprepare: vdso_prepare 81fa96b57cSHuacai Chenvdso_prepare: prepare0 82fa96b57cSHuacai Chen $(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h 83fa96b57cSHuacai Chenendif 84fa96b57cSHuacai Chen 85fa96b57cSHuacai ChenPHONY += vdso_install 86fa96b57cSHuacai Chenvdso_install: 87fa96b57cSHuacai Chen $(Q)$(MAKE) $(build)=arch/loongarch/vdso $@ 88fa96b57cSHuacai Chen 89fa96b57cSHuacai Chenall: $(KBUILD_IMAGE) 90fa96b57cSHuacai Chen 91fa96b57cSHuacai Chen$(KBUILD_IMAGE): vmlinux 92fa96b57cSHuacai Chen $(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $@ 93fa96b57cSHuacai Chen 94fa96b57cSHuacai Cheninstall: 95fa96b57cSHuacai Chen $(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) 96fa96b57cSHuacai Chen $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) 97fa96b57cSHuacai Chen $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) 98fa96b57cSHuacai Chen 99fa96b57cSHuacai Chendefine archhelp 100fa96b57cSHuacai Chen echo ' install - install kernel into $(INSTALL_PATH)' 101fa96b57cSHuacai Chen echo 102fa96b57cSHuacai Chenendef 103