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 160