projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| fa96b57c HC |
1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | # | |
| 3 | # Author: Huacai Chen <chenhuacai@loongson.cn> | |
| 4 | # Copyright (C) 2020-2022 Loongson Technology Corporation Limited | |
| 5 | ||
| 6 | boot := arch/loongarch/boot | |
| 7 | ||
| 9e8536e2 HC |
8 | KBUILD_DEFCONFIG := loongson3_defconfig |
| 9 | ||
| fa96b57c HC |
10 | KBUILD_IMAGE = $(boot)/vmlinux |
| 11 | ||
| 12 | # | |
| 13 | # Select the object file format to substitute into the linker script. | |
| 14 | # | |
| 15 | 64bit-tool-archpref = loongarch64 | |
| 16 | 32bit-bfd = elf32-loongarch | |
| 17 | 64bit-bfd = elf64-loongarch | |
| 18 | 32bit-emul = elf32loongarch | |
| 19 | 64bit-emul = elf64loongarch | |
| 20 | ||
| 21 | ifdef CONFIG_64BIT | |
| 22 | tool-archpref = $(64bit-tool-archpref) | |
| 23 | UTS_MACHINE := loongarch64 | |
| 24 | endif | |
| 25 | ||
| 26 | ifneq ($(SUBARCH),$(ARCH)) | |
| 27 | ifeq ($(CROSS_COMPILE),) | |
| 28 | CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) | |
| 29 | endif | |
| 30 | endif | |
| 31 | ||
| 32 | ifdef CONFIG_64BIT | |
| 33 | ld-emul = $(64bit-emul) | |
| 34 | cflags-y += -mabi=lp64s | |
| 35 | endif | |
| 36 | ||
| 37 | cflags-y += -G0 -pipe -msoft-float | |
| 38 | LDFLAGS_vmlinux += -G0 -static -n -nostdlib | |
| 39 | KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel | |
| 40 | KBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel | |
| 41 | KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs | |
| 42 | KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs | |
| 43 | ||
| 44 | cflags-y += -ffreestanding | |
| 45 | cflags-y += $(call cc-option, -mno-check-zero-division) | |
| 46 | ||
| 47 | load-y = 0x9000000000200000 | |
| 48 | bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) | |
| 49 | ||
| 50 | KBUILD_AFLAGS += $(cflags-y) | |
| 51 | KBUILD_CFLAGS += $(cflags-y) | |
| 52 | KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) | |
| 53 | ||
| 54 | # This is required to get dwarf unwinding tables into .debug_frame | |
| 55 | # instead of .eh_frame so we don't discard them. | |
| 56 | KBUILD_CFLAGS += -fno-asynchronous-unwind-tables | |
| 57 | ||
| 58 | # Don't emit unaligned accesses. | |
| 59 | # Not all LoongArch cores support unaligned access, and as kernel we can't | |
| 60 | # rely on others to provide emulation for these accesses. | |
| 61 | KBUILD_CFLAGS += $(call cc-option,-mstrict-align) | |
| 62 | ||
| 63 | KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include) | |
| 64 | ||
| 65 | KBUILD_LDFLAGS += -m $(ld-emul) | |
| 66 | ||
| 67 | ifdef CONFIG_LOONGARCH | |
| 68 | CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ | |
| 69 | egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ | |
| 70 | sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') | |
| 71 | endif | |
| 72 | ||
| 73 | head-y := arch/loongarch/kernel/head.o | |
| 74 | ||
| 75 | libs-y += arch/loongarch/lib/ | |
| 76 | ||
| 77 | ifeq ($(KBUILD_EXTMOD),) | |
| 78 | prepare: vdso_prepare | |
| 79 | vdso_prepare: prepare0 | |
| 80 | $(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h | |
| 81 | endif | |
| 82 | ||
| 83 | PHONY += vdso_install | |
| 84 | vdso_install: | |
| 85 | $(Q)$(MAKE) $(build)=arch/loongarch/vdso $@ | |
| 86 | ||
| 87 | all: $(KBUILD_IMAGE) | |
| 88 | ||
| 89 | $(KBUILD_IMAGE): vmlinux | |
| 90 | $(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $@ | |
| 91 | ||
| 92 | install: | |
| 93 | $(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE) | |
| 94 | $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) | |
| 95 | $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE) | |
| 96 | ||
| 97 | define archhelp | |
| 98 | echo ' install - install kernel into $(INSTALL_PATH)' | |
| 99 | echo | |
| 100 | endef |