1 files changed, 100 insertions, 0 deletions
diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile
new file mode 100644
index 000000000000..fbe4277e6404
--- /dev/null
+++ b/arch/loongarch/Makefile
@@ -0,0 +1,100 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Author: Huacai Chen <chenhuacai@loongson.cn>
+# Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+
+boot	:= arch/loongarch/boot
+
+KBUILD_DEFCONFIG := loongson3_defconfig
+
+KBUILD_IMAGE	= $(boot)/vmlinux
+
+#
+# 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
+
+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			+= -G0 -pipe -msoft-float
+LDFLAGS_vmlinux			+= -G0 -static -n -nostdlib
+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
+
+cflags-y += -ffreestanding
+cflags-y += $(call cc-option, -mno-check-zero-division)
+
+load-y		= 0x9000000000200000
+bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y)
+
+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
+
+# 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)
+
+KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include)
+
+KBUILD_LDFLAGS	+= -m $(ld-emul)
+
+ifdef CONFIG_LOONGARCH
+CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
+	egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
+	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
+endif
+
+head-y := arch/loongarch/kernel/head.o
+
+libs-y += arch/loongarch/lib/
+
+ifeq ($(KBUILD_EXTMOD),)
+prepare: vdso_prepare
+vdso_prepare: prepare0
+	$(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h
+endif
+
+PHONY += vdso_install
+vdso_install:
+	$(Q)$(MAKE) $(build)=arch/loongarch/vdso $@
+
+all:	$(KBUILD_IMAGE)
+
+$(KBUILD_IMAGE): vmlinux
+	$(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $@
+
+install:
+	$(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/vmlinux-$(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