xref: /openbmc/linux/arch/arm64/Makefile (revision 8b235f2f) 
1#
2# arch/arm64/Makefile
3#
4# This file is included by the global makefile so that you can add your own
5# architecture-specific flags and dependencies.
6#
7# This file is subject to the terms and conditions of the GNU General Public
8# License.  See the file "COPYING" in the main directory of this archive
9# for more details.
10#
11# Copyright (C) 1995-2001 by Russell King
12
13LDFLAGS_vmlinux	:=-p --no-undefined -X
14CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
15OBJCOPYFLAGS	:=-O binary -R .note -R .note.gnu.build-id -R .comment -S
16GZFLAGS		:=-9
17
18KBUILD_DEFCONFIG := defconfig
19
20# Check for binutils support for specific extensions
21lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
22
23ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
24  ifeq ($(lseinstr),)
25$(warning LSE atomics not supported by binutils)
26  endif
27endif
28
29KBUILD_CFLAGS	+= -mgeneral-regs-only $(lseinstr)
30KBUILD_AFLAGS	+= $(lseinstr)
31
32ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
33KBUILD_CPPFLAGS	+= -mbig-endian
34AS		+= -EB
35LD		+= -EB
36else
37KBUILD_CPPFLAGS	+= -mlittle-endian
38AS		+= -EL
39LD		+= -EL
40endif
41
42CHECKFLAGS	+= -D__aarch64__
43
44# Default value
45head-y		:= arch/arm64/kernel/head.o
46
47# The byte offset of the kernel image in RAM from the start of RAM.
48ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
49TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
50else
51TEXT_OFFSET := 0x00080000
52endif
53
54export	TEXT_OFFSET GZFLAGS
55
56core-y		+= arch/arm64/kernel/ arch/arm64/mm/
57core-$(CONFIG_NET) += arch/arm64/net/
58core-$(CONFIG_KVM) += arch/arm64/kvm/
59core-$(CONFIG_XEN) += arch/arm64/xen/
60core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
61libs-y		:= arch/arm64/lib/ $(libs-y)
62core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
63
64# Default target when executing plain make
65KBUILD_IMAGE	:= Image.gz
66KBUILD_DTBS	:= dtbs
67
68all:	$(KBUILD_IMAGE) $(KBUILD_DTBS)
69
70boot := arch/arm64/boot
71
72Image: vmlinux
73	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
74
75Image.%: vmlinux
76	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
77
78zinstall install: vmlinux
79	$(Q)$(MAKE) $(build)=$(boot) $@
80
81%.dtb: scripts
82	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
83
84PHONY += dtbs dtbs_install
85
86dtbs: prepare scripts
87	$(Q)$(MAKE) $(build)=$(boot)/dts
88
89dtbs_install:
90	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts
91
92PHONY += vdso_install
93vdso_install:
94	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
95
96# We use MRPROPER_FILES and CLEAN_FILES now
97archclean:
98	$(Q)$(MAKE) $(clean)=$(boot)
99	$(Q)$(MAKE) $(clean)=$(boot)/dts
100
101define archhelp
102  echo  '* Image.gz      - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
103  echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
104  echo  '* dtbs          - Build device tree blobs for enabled boards'
105  echo  '  dtbs_install  - Install dtbs to $(INSTALL_DTBS_PATH)'
106  echo  '  install       - Install uncompressed kernel'
107  echo  '  zinstall      - Install compressed kernel'
108  echo  '                  Install using (your) ~/bin/installkernel or'
109  echo  '                  (distribution) /sbin/installkernel or'
110  echo  '                  install to $$(INSTALL_PATH) and run lilo'
111endef
112