1 # SPDX-License-Identifier: GPL-2.0
3 # Author: Huacai Chen <chenhuacai@loongson.cn>
4 # Copyright (C) 2020-2022 Loongson Technology Corporation Limited
6 boot := arch/loongarch/boot
8 KBUILD_DEFCONFIG := loongson3_defconfig
10 image-name-y := vmlinux
11 image-name-$(CONFIG_EFI_ZBOOT) := vmlinuz
13 ifndef CONFIG_EFI_STUB
14 KBUILD_IMAGE := $(boot)/vmlinux.elf
16 KBUILD_IMAGE := $(boot)/$(image-name-y).efi
20 # Select the object file format to substitute into the linker script.
22 64bit-tool-archpref = loongarch64
23 32bit-bfd = elf32-loongarch
24 64bit-bfd = elf64-loongarch
25 32bit-emul = elf32loongarch
26 64bit-emul = elf64loongarch
29 tool-archpref = $(64bit-tool-archpref)
30 UTS_MACHINE := loongarch64
33 ifneq ($(SUBARCH),$(ARCH))
34 ifeq ($(CROSS_COMPILE),)
35 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
40 ld-emul = $(64bit-emul)
41 cflags-y += -mabi=lp64s
44 cflags-y += -G0 -pipe -msoft-float
45 LDFLAGS_vmlinux += -G0 -static -n -nostdlib
46 KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel
47 KBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel
48 KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs
49 KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs
51 cflags-y += -ffreestanding
52 cflags-y += $(call cc-option, -mno-check-zero-division)
54 load-y = 0x9000000000200000
55 bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y)
57 drivers-$(CONFIG_PCI) += arch/loongarch/pci/
59 KBUILD_AFLAGS += $(cflags-y)
60 KBUILD_CFLAGS += $(cflags-y)
61 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
63 # This is required to get dwarf unwinding tables into .debug_frame
64 # instead of .eh_frame so we don't discard them.
65 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
67 # Don't emit unaligned accesses.
68 # Not all LoongArch cores support unaligned access, and as kernel we can't
69 # rely on others to provide emulation for these accesses.
70 KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
72 KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include)
74 KBUILD_LDFLAGS += -m $(ld-emul)
76 ifdef CONFIG_LOONGARCH
77 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
78 egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
79 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
82 head-y := arch/loongarch/kernel/head.o
84 libs-y += arch/loongarch/lib/
85 libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
87 ifeq ($(KBUILD_EXTMOD),)
89 vdso_prepare: prepare0
90 $(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h
95 $(Q)$(MAKE) $(build)=arch/loongarch/vdso $@
97 all: $(notdir $(KBUILD_IMAGE))
99 vmlinux.elf vmlinux.efi vmlinuz.efi: vmlinux
100 $(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $(boot)/$@
103 $(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/$(image-name-y)-$(KERNELRELEASE)
104 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
105 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
108 echo ' install - install kernel into $(INSTALL_PATH)'