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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=$(TEXT_OFFSET)
15OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
16GZFLAGS :=-9
17
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18ifneq ($(CONFIG_RELOCATABLE),)
19LDFLAGS_vmlinux += -pie
20endif
21
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22KBUILD_DEFCONFIG := defconfig
23
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24# Check for binutils support for specific extensions
25lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
26
27ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
28 ifeq ($(lseinstr),)
29$(warning LSE atomics not supported by binutils)
30 endif
31endif
32
33KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr)
728dabd6 34KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
67dfa175 35KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
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36KBUILD_AFLAGS += $(lseinstr)
37
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38ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
39KBUILD_CPPFLAGS += -mbig-endian
40AS += -EB
41LD += -EB
42else
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43KBUILD_CPPFLAGS += -mlittle-endian
44AS += -EL
45LD += -EL
a0974e6e 46endif
8c2c3df3 47
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48CHECKFLAGS += -D__aarch64__
49
fd045f6c 50ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
b6dd8e07 51KBUILD_CFLAGS_MODULE += -mcmodel=large
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52endif
53
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54ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
55KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds
56endif
57
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58# Default value
59head-y := arch/arm64/kernel/head.o
60
61# The byte offset of the kernel image in RAM from the start of RAM.
da57a369 62ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
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63TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \
64 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \
65 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}")
da57a369 66else
8c2c3df3 67TEXT_OFFSET := 0x00080000
da57a369 68endif
8c2c3df3 69
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70# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
71# in 32-bit arithmetic
72KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
73 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
74 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \
75 - (1 << (64 - 32 - 3)) )) )
76
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77export TEXT_OFFSET GZFLAGS
78
79core-y += arch/arm64/kernel/ arch/arm64/mm/
e54bcde3 80core-$(CONFIG_NET) += arch/arm64/net/
6211753f 81core-$(CONFIG_KVM) += arch/arm64/kvm/
63917f0b 82core-$(CONFIG_XEN) += arch/arm64/xen/
2c98833a 83core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
8c2c3df3 84libs-y := arch/arm64/lib/ $(libs-y)
ad08fd49 85core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
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86
87# Default target when executing plain make
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88KBUILD_IMAGE := Image.gz
89KBUILD_DTBS := dtbs
8c2c3df3 90
70f915a2 91all: $(KBUILD_IMAGE) $(KBUILD_DTBS)
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92
93boot := arch/arm64/boot
94
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95Image: vmlinux
96 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
97
98Image.%: vmlinux
70f915a2 99 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
8c2c3df3 100
8684fa3e 101zinstall install:
70f915a2 102 $(Q)$(MAKE) $(build)=$(boot) $@
8c2c3df3 103
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104%.dtb: scripts
105 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
106
862f464a 107PHONY += dtbs dtbs_install
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108
109dtbs: prepare scripts
d38726c4 110 $(Q)$(MAKE) $(build)=$(boot)/dts
8c2c3df3 111
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112dtbs_install:
113 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts
114
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115PHONY += vdso_install
116vdso_install:
117 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
118
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119# We use MRPROPER_FILES and CLEAN_FILES now
120archclean:
121 $(Q)$(MAKE) $(clean)=$(boot)
c7c52e48 122 $(Q)$(MAKE) $(clean)=$(boot)/dts
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123
124define archhelp
125 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
126 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
70f915a2 127 echo '* dtbs - Build device tree blobs for enabled boards'
862f464a 128 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
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129 echo ' install - Install uncompressed kernel'
130 echo ' zinstall - Install compressed kernel'
131 echo ' Install using (your) ~/bin/installkernel or'
132 echo ' (distribution) /sbin/installkernel or'
133 echo ' install to $$(INSTALL_PATH) and run lilo'
134endef