xref: /openbmc/linux/arch/arm64/Makefile (revision a8fe58ce) 
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_CFLAGS	+= -fno-asynchronous-unwind-tables
31KBUILD_CFLAGS	+= $(call cc-option, -mpc-relative-literal-loads)
32KBUILD_AFLAGS	+= $(lseinstr)
33
34ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
35KBUILD_CPPFLAGS	+= -mbig-endian
36AS		+= -EB
37LD		+= -EB
38else
39KBUILD_CPPFLAGS	+= -mlittle-endian
40AS		+= -EL
41LD		+= -EL
42endif
43
44CHECKFLAGS	+= -D__aarch64__
45
46ifeq ($(CONFIG_ARM64_ERRATUM_843419), y)
47KBUILD_CFLAGS_MODULE	+= -mcmodel=large
48endif
49
50# Default value
51head-y		:= arch/arm64/kernel/head.o
52
53# The byte offset of the kernel image in RAM from the start of RAM.
54ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
55TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
56else
57TEXT_OFFSET := 0x00080000
58endif
59
60# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
61# in 32-bit arithmetic
62KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
63			(0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
64			+ (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \
65			- (1 << (64 - 32 - 3)) )) )
66
67export	TEXT_OFFSET GZFLAGS
68
69core-y		+= arch/arm64/kernel/ arch/arm64/mm/
70core-$(CONFIG_NET) += arch/arm64/net/
71core-$(CONFIG_KVM) += arch/arm64/kvm/
72core-$(CONFIG_XEN) += arch/arm64/xen/
73core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
74libs-y		:= arch/arm64/lib/ $(libs-y)
75core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
76
77# Default target when executing plain make
78KBUILD_IMAGE	:= Image.gz
79KBUILD_DTBS	:= dtbs
80
81all:	$(KBUILD_IMAGE) $(KBUILD_DTBS)
82
83boot := arch/arm64/boot
84
85Image: vmlinux
86	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
87
88Image.%: vmlinux
89	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
90
91zinstall install: vmlinux
92	$(Q)$(MAKE) $(build)=$(boot) $@
93
94%.dtb: scripts
95	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
96
97PHONY += dtbs dtbs_install
98
99dtbs: prepare scripts
100	$(Q)$(MAKE) $(build)=$(boot)/dts
101
102dtbs_install:
103	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts
104
105PHONY += vdso_install
106vdso_install:
107	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
108
109# We use MRPROPER_FILES and CLEAN_FILES now
110archclean:
111	$(Q)$(MAKE) $(clean)=$(boot)
112	$(Q)$(MAKE) $(clean)=$(boot)/dts
113
114define archhelp
115  echo  '* Image.gz      - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
116  echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
117  echo  '* dtbs          - Build device tree blobs for enabled boards'
118  echo  '  dtbs_install  - Install dtbs to $(INSTALL_DTBS_PATH)'
119  echo  '  install       - Install uncompressed kernel'
120  echo  '  zinstall      - Install compressed kernel'
121  echo  '                  Install using (your) ~/bin/installkernel or'
122  echo  '                  (distribution) /sbin/installkernel or'
123  echo  '                  install to $$(INSTALL_PATH) and run lilo'
124endef
125