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=$(TEXT_OFFSET)
15 OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
18 ifneq ($(CONFIG_RELOCATABLE),)
19 LDFLAGS_vmlinux += -pie
22 KBUILD_DEFCONFIG := defconfig
24 # Check for binutils support for specific extensions
25 lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
27 ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
29 $(warning LSE atomics not supported by binutils)
33 KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr)
34 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
35 KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
36 KBUILD_AFLAGS += $(lseinstr)
38 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
39 KBUILD_CPPFLAGS += -mbig-endian
43 KBUILD_CPPFLAGS += -mlittle-endian
48 CHECKFLAGS += -D__aarch64__
50 ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
51 KBUILD_CFLAGS_MODULE += -mcmodel=large
54 ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
55 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds
59 head-y := arch/arm64/kernel/head.o
61 # The byte offset of the kernel image in RAM from the start of RAM.
62 ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
63 TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
65 TEXT_OFFSET := 0x00080000
68 # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
69 # in 32-bit arithmetic
70 KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
71 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
72 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \
73 - (1 << (64 - 32 - 3)) )) )
75 export TEXT_OFFSET GZFLAGS
77 core-y += arch/arm64/kernel/ arch/arm64/mm/
78 core-$(CONFIG_NET) += arch/arm64/net/
79 core-$(CONFIG_KVM) += arch/arm64/kvm/
80 core-$(CONFIG_XEN) += arch/arm64/xen/
81 core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
82 libs-y := arch/arm64/lib/ $(libs-y)
83 core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
85 # Default target when executing plain make
86 KBUILD_IMAGE := Image.gz
89 all: $(KBUILD_IMAGE) $(KBUILD_DTBS)
91 boot := arch/arm64/boot
94 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
97 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
100 $(Q)$(MAKE) $(build)=$(boot) $@
103 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
105 PHONY += dtbs dtbs_install
107 dtbs: prepare scripts
108 $(Q)$(MAKE) $(build)=$(boot)/dts
111 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts
113 PHONY += vdso_install
115 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
117 # We use MRPROPER_FILES and CLEAN_FILES now
119 $(Q)$(MAKE) $(clean)=$(boot)
120 $(Q)$(MAKE) $(clean)=$(boot)/dts
123 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
124 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
125 echo '* dtbs - Build device tree blobs for enabled boards'
126 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
127 echo ' install - Install uncompressed kernel'
128 echo ' zinstall - Install compressed kernel'
129 echo ' Install using (your) ~/bin/installkernel or'
130 echo ' (distribution) /sbin/installkernel or'
131 echo ' install to $$(INSTALL_PATH) and run lilo'