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