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