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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=$(TEXT_OFFSET)
15OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
16GZFLAGS :=-9
17
18ifneq ($(CONFIG_RELOCATABLE),)
19LDFLAGS_vmlinux += -pie
20endif
21
22KBUILD_DEFCONFIG := defconfig
23
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)
34KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
35KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
36KBUILD_AFLAGS += $(lseinstr)
37
38ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
39KBUILD_CPPFLAGS += -mbig-endian
40AS += -EB
41LD += -EB
42else
43KBUILD_CPPFLAGS += -mlittle-endian
44AS += -EL
45LD += -EL
46endif
47
48CHECKFLAGS += -D__aarch64__
49
50ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
51KBUILD_CFLAGS_MODULE += -mcmodel=large
52endif
53
54ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
55KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds
56endif
57
58# Default value
59head-y := arch/arm64/kernel/head.o
60
61# The byte offset of the kernel image in RAM from the start of RAM.
62ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
63TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
64else
65TEXT_OFFSET := 0x00080000
66endif
67
68# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
69# in 32-bit arithmetic
70KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
71 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
72 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \
73 - (1 << (64 - 32 - 3)) )) )
74
75export TEXT_OFFSET GZFLAGS
76
77core-y += arch/arm64/kernel arch/arm64/mm/
78core-$(CONFIG_NET) += arch/arm64/net/
79core-$(CONFIG_KVM) += arch/arm64/kvm/
80core-$(CONFIG_XEN) += arch/arm64/xen/
81core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
82libs-y := arch/arm64/lib/ $(libs-y)
83core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
84
85# Default target when executing plain make
86KBUILD_IMAGE := Image.gz
87KBUILD_DTBS := dtbs
88
89all: $(KBUILD_IMAGE) $(KBUILD_DTBS)
90
91boot := arch/arm64/boot
92
93Image: vmlinux
94 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
95
96Image.%: vmlinux
97 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
98
99zinstall install:
100 $(Q)$(MAKE) $(build)=$(boot) $@
101
102%.dtb: scripts
103 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
104
105PHONY += dtbs dtbs_install
106
107dtbs: prepare scripts
108 $(Q)$(MAKE) $(build)=$(boot)/dts
109
110dtbs_install:
111 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts
112
113PHONY += vdso_install
114vdso_install:
115 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
116
117# We use MRPROPER_FILES and CLEAN_FILES now
118archclean:
119 $(Q)$(MAKE) $(clean)=$(boot)
120 $(Q)$(MAKE) $(clean)=$(boot)/dts
121
122define archhelp
123 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
124 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
125 echo '* dtbs - Build device tree blobs for enabled boards'
126 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
127 echo ' install - Install uncompressed kernel'
128 echo ' zinstall - Install compressed kernel'
129 echo ' Install using (your) ~/bin/installkernel or'
130 echo ' (distribution) /sbin/installkernel or'
131 echo ' install to $$(INSTALL_PATH) and run lilo'
132endef
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=$(TEXT_OFFSET)
15GZFLAGS :=-9
16
17ifneq ($(CONFIG_RELOCATABLE),)
18LDFLAGS_vmlinux += -pie -shared -Bsymbolic
19endif
20
21ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
22 ifeq ($(call ld-option, --fix-cortex-a53-843419),)
23$(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum)
24 else
25LDFLAGS_vmlinux += --fix-cortex-a53-843419
26 endif
27endif
28
29KBUILD_DEFCONFIG := defconfig
30
31# Check for binutils support for specific extensions
32lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
33
34ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
35 ifeq ($(lseinstr),)
36$(warning LSE atomics not supported by binutils)
37 endif
38endif
39
40brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1)
41
42ifneq ($(brokengasinst),)
43$(warning Detected assembler with broken .inst; disassembly will be unreliable)
44endif
45
46KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst)
47KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
48KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
49KBUILD_AFLAGS += $(lseinstr) $(brokengasinst)
50
51ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
52KBUILD_CPPFLAGS += -mbig-endian
53AS += -EB
54LD += -EB
55UTS_MACHINE := aarch64_be
56else
57KBUILD_CPPFLAGS += -mlittle-endian
58AS += -EL
59LD += -EL
60UTS_MACHINE := aarch64
61endif
62
63CHECKFLAGS += -D__aarch64__
64
65ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
66KBUILD_CFLAGS_MODULE += -mcmodel=large
67endif
68
69ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
70KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds
71endif
72
73# Default value
74head-y := arch/arm64/kernel/head.o
75
76# The byte offset of the kernel image in RAM from the start of RAM.
77ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
78TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \
79 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \
80 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}")
81else
82TEXT_OFFSET := 0x00080000
83endif
84
85# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
86# in 32-bit arithmetic
87KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
88 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
89 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \
90 - (1 << (64 - 32 - 3)) )) )
91
92export TEXT_OFFSET GZFLAGS
93
94core-y += arch/arm64/kernel arch/arm64/mm/
95core-$(CONFIG_NET) += arch/arm64/net/
96core-$(CONFIG_KVM) += arch/arm64/kvm/
97core-$(CONFIG_XEN) += arch/arm64/xen/
98core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
99libs-y := arch/arm64/lib/ $(libs-y)
100core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
101
102# Default target when executing plain make
103KBUILD_IMAGE := Image.gz
104KBUILD_DTBS := dtbs
105
106all: $(KBUILD_IMAGE) $(KBUILD_DTBS)
107
108boot := arch/arm64/boot
109
110Image: vmlinux
111 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
112
113Image.%: Image
114 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
115
116zinstall install:
117 $(Q)$(MAKE) $(build)=$(boot) $@
118
119%.dtb: scripts
120 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
121
122PHONY += dtbs dtbs_install
123
124dtbs: prepare scripts
125 $(Q)$(MAKE) $(build)=$(boot)/dts
126
127dtbs_install:
128 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts
129
130PHONY += vdso_install
131vdso_install:
132 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
133
134# We use MRPROPER_FILES and CLEAN_FILES now
135archclean:
136 $(Q)$(MAKE) $(clean)=$(boot)
137 $(Q)$(MAKE) $(clean)=$(boot)/dts
138
139# We need to generate vdso-offsets.h before compiling certain files in kernel/.
140# In order to do that, we should use the archprepare target, but we can't since
141# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
142# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
143# Therefore we need to generate the header after prepare0 has been made, hence
144# this hack.
145prepare: vdso_prepare
146vdso_prepare: prepare0
147 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h
148
149define archhelp
150 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
151 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
152 echo '* dtbs - Build device tree blobs for enabled boards'
153 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
154 echo ' install - Install uncompressed kernel'
155 echo ' zinstall - Install compressed kernel'
156 echo ' Install using (your) ~/bin/installkernel or'
157 echo ' (distribution) /sbin/installkernel or'
158 echo ' install to $$(INSTALL_PATH) and run lilo'
159endef