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 19endif 20 21KBUILD_DEFCONFIG := defconfig 22 23# Check for binutils support for specific extensions 24lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1) 25 26ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y) 27 ifeq ($(lseinstr),) 28$(warning LSE atomics not supported by binutils) 29 endif 30endif 31 32KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) 33KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 34KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) 35KBUILD_AFLAGS += $(lseinstr) 36 37ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) 38KBUILD_CPPFLAGS += -mbig-endian 39AS += -EB 40LD += -EB 41else 42KBUILD_CPPFLAGS += -mlittle-endian 43AS += -EL 44LD += -EL 45endif 46 47CHECKFLAGS += -D__aarch64__ 48 49ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y) 50KBUILD_CFLAGS_MODULE += -mcmodel=large 51endif 52 53ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) 54KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds 55endif 56 57# Default value 58head-y := arch/arm64/kernel/head.o 59 60# The byte offset of the kernel image in RAM from the start of RAM. 61ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) 62TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \ 63 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \ 64 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}") 65else 66TEXT_OFFSET := 0x00080000 67endif 68 69# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61) 70# in 32-bit arithmetic 71KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \ 72 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \ 73 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \ 74 - (1 << (64 - 32 - 3)) )) ) 75 76export TEXT_OFFSET GZFLAGS 77 78core-y += arch/arm64/kernel/ arch/arm64/mm/ 79core-$(CONFIG_NET) += arch/arm64/net/ 80core-$(CONFIG_KVM) += arch/arm64/kvm/ 81core-$(CONFIG_XEN) += arch/arm64/xen/ 82core-$(CONFIG_CRYPTO) += arch/arm64/crypto/ 83libs-y := arch/arm64/lib/ $(libs-y) 84core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a 85 86# Default target when executing plain make 87KBUILD_IMAGE := Image.gz 88KBUILD_DTBS := dtbs 89 90all: $(KBUILD_IMAGE) $(KBUILD_DTBS) 91 92boot := arch/arm64/boot 93 94Image: vmlinux 95 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 96 97Image.%: vmlinux 98 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 99 100zinstall install: 101 $(Q)$(MAKE) $(build)=$(boot) $@ 102 103%.dtb: scripts 104 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ 105 106PHONY += dtbs dtbs_install 107 108dtbs: prepare scripts 109 $(Q)$(MAKE) $(build)=$(boot)/dts 110 111dtbs_install: 112 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts 113 114PHONY += vdso_install 115vdso_install: 116 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ 117 118# We use MRPROPER_FILES and CLEAN_FILES now 119archclean: 120 $(Q)$(MAKE) $(clean)=$(boot) 121 $(Q)$(MAKE) $(clean)=$(boot)/dts 122 123# We need to generate vdso-offsets.h before compiling certain files in kernel/. 124# In order to do that, we should use the archprepare target, but we can't since 125# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 126# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 127# Therefore we need to generate the header after prepare0 has been made, hence 128# this hack. 129prepare: vdso_prepare 130vdso_prepare: prepare0 131 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h 132 133define archhelp 134 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' 135 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' 136 echo '* dtbs - Build device tree blobs for enabled boards' 137 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)' 138 echo ' install - Install uncompressed kernel' 139 echo ' zinstall - Install compressed kernel' 140 echo ' Install using (your) ~/bin/installkernel or' 141 echo ' (distribution) /sbin/installkernel or' 142 echo ' install to $$(INSTALL_PATH) and run lilo' 143endef 144