4 # This file is included by the global makefile so that you can add your own
5 # architecture-specific flags and dependencies.
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
11 # Copyright (C) 1995-2001 by Russell King
13 LDFLAGS_vmlinux :=-p --no-undefined -X
14 CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
17 ifneq ($(CONFIG_RELOCATABLE),)
18 LDFLAGS_vmlinux += -pie -shared -Bsymbolic
21 ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
22 ifeq ($(call ld-option, --fix-cortex-a53-843419),)
23 $(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum)
25 LDFLAGS_vmlinux += --fix-cortex-a53-843419
29 KBUILD_DEFCONFIG := defconfig
31 # Check for binutils support for specific extensions
32 lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
34 ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
36 $(warning LSE atomics not supported by binutils)
40 brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1)
42 ifneq ($(brokengasinst),)
43 $(warning Detected assembler with broken .inst; disassembly will be unreliable)
46 KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst)
47 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
48 KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
49 KBUILD_AFLAGS += $(lseinstr) $(brokengasinst)
51 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
52 KBUILD_CPPFLAGS += -mbig-endian
55 UTS_MACHINE := aarch64_be
57 KBUILD_CPPFLAGS += -mlittle-endian
60 UTS_MACHINE := aarch64
63 CHECKFLAGS += -D__aarch64__
65 ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
66 KBUILD_CFLAGS_MODULE += -mcmodel=large
69 ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
70 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds
74 head-y := arch/arm64/kernel/head.o
76 # The byte offset of the kernel image in RAM from the start of RAM.
77 ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
78 TEXT_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))}")
82 TEXT_OFFSET := 0x00080000
85 # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
86 # in 32-bit arithmetic
87 KASAN_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)) )) )
92 export TEXT_OFFSET GZFLAGS
94 core-y += arch/arm64/kernel/ arch/arm64/mm/
95 core-$(CONFIG_NET) += arch/arm64/net/
96 core-$(CONFIG_KVM) += arch/arm64/kvm/
97 core-$(CONFIG_XEN) += arch/arm64/xen/
98 core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
99 libs-y := arch/arm64/lib/ $(libs-y)
100 core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
102 # Default target when executing plain make
103 KBUILD_IMAGE := Image.gz
106 all: $(KBUILD_IMAGE) $(KBUILD_DTBS)
108 boot := arch/arm64/boot
111 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
114 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
117 $(Q)$(MAKE) $(build)=$(boot) $@
120 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
122 PHONY += dtbs dtbs_install
124 dtbs: prepare scripts
125 $(Q)$(MAKE) $(build)=$(boot)/dts
128 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts
130 PHONY += vdso_install
132 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
134 # We use MRPROPER_FILES and CLEAN_FILES now
136 $(Q)$(MAKE) $(clean)=$(boot)
137 $(Q)$(MAKE) $(clean)=$(boot)/dts
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
145 prepare: vdso_prepare
146 vdso_prepare: prepare0
147 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h
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'