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 40ifeq ($(CONFIG_ARM64), y) 41brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1) 42 43 ifneq ($(brokengasinst),) 44$(warning Detected assembler with broken .inst; disassembly will be unreliable) 45 endif 46endif 47 48KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) 49KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 50KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) 51KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) 52 53ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) 54KBUILD_CPPFLAGS += -mbig-endian 55CHECKFLAGS += -D__AARCH64EB__ 56AS += -EB 57LD += -EB 58UTS_MACHINE := aarch64_be 59else 60KBUILD_CPPFLAGS += -mlittle-endian 61CHECKFLAGS += -D__AARCH64EL__ 62AS += -EL 63LD += -EL 64UTS_MACHINE := aarch64 65endif 66 67CHECKFLAGS += -D__aarch64__ -m64 68 69ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y) 70KBUILD_CFLAGS_MODULE += -mcmodel=large 71endif 72 73ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) 74KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds 75ifeq ($(CONFIG_DYNAMIC_FTRACE),y) 76KBUILD_LDFLAGS_MODULE += $(objtree)/arch/arm64/kernel/ftrace-mod.o 77endif 78endif 79 80# Default value 81head-y := arch/arm64/kernel/head.o 82 83# The byte offset of the kernel image in RAM from the start of RAM. 84ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) 85TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \ 86 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \ 87 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}") 88else 89TEXT_OFFSET := 0x00080000 90endif 91 92# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61) 93# in 32-bit arithmetic 94KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \ 95 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \ 96 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \ 97 - (1 << (64 - 32 - 3)) )) ) 98 99export TEXT_OFFSET GZFLAGS 100 101core-y += arch/arm64/kernel/ arch/arm64/mm/ 102core-$(CONFIG_NET) += arch/arm64/net/ 103core-$(CONFIG_KVM) += arch/arm64/kvm/ 104core-$(CONFIG_XEN) += arch/arm64/xen/ 105core-$(CONFIG_CRYPTO) += arch/arm64/crypto/ 106libs-y := arch/arm64/lib/ $(libs-y) 107core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a 108 109# Default target when executing plain make 110boot := arch/arm64/boot 111KBUILD_IMAGE := $(boot)/Image.gz 112KBUILD_DTBS := dtbs 113 114all: Image.gz $(KBUILD_DTBS) 115 116 117Image: vmlinux 118 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 119 120Image.%: Image 121 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 122 123zinstall install: 124 $(Q)$(MAKE) $(build)=$(boot) $@ 125 126%.dtb: scripts 127 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ 128 129PHONY += dtbs dtbs_install 130 131dtbs: prepare scripts 132 $(Q)$(MAKE) $(build)=$(boot)/dts 133 134dtbs_install: 135 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts 136 137PHONY += vdso_install 138vdso_install: 139 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ 140 141# We use MRPROPER_FILES and CLEAN_FILES now 142archclean: 143 $(Q)$(MAKE) $(clean)=$(boot) 144 $(Q)$(MAKE) $(clean)=$(boot)/dts 145 146# We need to generate vdso-offsets.h before compiling certain files in kernel/. 147# In order to do that, we should use the archprepare target, but we can't since 148# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 149# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 150# Therefore we need to generate the header after prepare0 has been made, hence 151# this hack. 152prepare: vdso_prepare 153vdso_prepare: prepare0 154 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h 155 156define archhelp 157 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' 158 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' 159 echo '* dtbs - Build device tree blobs for enabled boards' 160 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)' 161 echo ' install - Install uncompressed kernel' 162 echo ' zinstall - Install compressed kernel' 163 echo ' Install using (your) ~/bin/installkernel or' 164 echo ' (distribution) /sbin/installkernel or' 165 echo ' install to $$(INSTALL_PATH) and run lilo' 166endef 167