xref: /openbmc/linux/arch/loongarch/Makefile (revision 53f9cd5c) 
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
6boot	:= arch/loongarch/boot
7
8KBUILD_DEFCONFIG := loongson3_defconfig
9
10KBUILD_IMAGE	= $(boot)/vmlinux
11
12#
13# Select the object file format to substitute into the linker script.
14#
1564bit-tool-archpref	= loongarch64
1632bit-bfd		= elf32-loongarch
1764bit-bfd		= elf64-loongarch
1832bit-emul		= elf32loongarch
1964bit-emul		= elf64loongarch
20
21ifdef CONFIG_64BIT
22tool-archpref		= $(64bit-tool-archpref)
23UTS_MACHINE		:= loongarch64
24endif
25
26ifneq ($(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
30endif
31
32ifdef CONFIG_64BIT
33ld-emul			= $(64bit-emul)
34cflags-y		+= -mabi=lp64s
35endif
36
37cflags-y			+= -G0 -pipe -msoft-float
38LDFLAGS_vmlinux			+= -G0 -static -n -nostdlib
39KBUILD_AFLAGS_KERNEL		+= -Wa,-mla-global-with-pcrel
40KBUILD_CFLAGS_KERNEL		+= -Wa,-mla-global-with-pcrel
41KBUILD_AFLAGS_MODULE		+= -Wa,-mla-global-with-abs
42KBUILD_CFLAGS_MODULE		+= -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs
43
44cflags-y += -ffreestanding
45cflags-y += $(call cc-option, -mno-check-zero-division)
46
47load-y		= 0x9000000000200000
48bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y)
49
50drivers-$(CONFIG_PCI)		+= arch/loongarch/pci/
51
52KBUILD_AFLAGS	+= $(cflags-y)
53KBUILD_CFLAGS	+= $(cflags-y)
54KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
55
56# This is required to get dwarf unwinding tables into .debug_frame
57# instead of .eh_frame so we don't discard them.
58KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
59
60# Don't emit unaligned accesses.
61# Not all LoongArch cores support unaligned access, and as kernel we can't
62# rely on others to provide emulation for these accesses.
63KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
64
65KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include)
66
67KBUILD_LDFLAGS	+= -m $(ld-emul)
68
69ifdef CONFIG_LOONGARCH
70CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
71	egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
72	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
73endif
74
75head-y := arch/loongarch/kernel/head.o
76
77libs-y += arch/loongarch/lib/
78
79ifeq ($(KBUILD_EXTMOD),)
80prepare: vdso_prepare
81vdso_prepare: prepare0
82	$(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h
83endif
84
85PHONY += vdso_install
86vdso_install:
87	$(Q)$(MAKE) $(build)=arch/loongarch/vdso $@
88
89all:	$(KBUILD_IMAGE)
90
91$(KBUILD_IMAGE): vmlinux
92	$(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $@
93
94install:
95	$(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
96	$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
97	$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
98
99define archhelp
100	echo '  install              - install kernel into $(INSTALL_PATH)'
101	echo
102endef
103