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) 15OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S 16GZFLAGS :=-9 17 18KBUILD_DEFCONFIG := defconfig 19 20# Check for binutils support for specific extensions 21lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1) 22 23ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y) 24 ifeq ($(lseinstr),) 25$(warning LSE atomics not supported by binutils) 26 endif 27endif 28 29KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) 30KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 31KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) 32KBUILD_AFLAGS += $(lseinstr) 33 34ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) 35KBUILD_CPPFLAGS += -mbig-endian 36AS += -EB 37LD += -EB 38else 39KBUILD_CPPFLAGS += -mlittle-endian 40AS += -EL 41LD += -EL 42endif 43 44CHECKFLAGS += -D__aarch64__ 45 46ifeq ($(CONFIG_ARM64_ERRATUM_843419), y) 47KBUILD_CFLAGS_MODULE += -mcmodel=large 48endif 49 50# Default value 51head-y := arch/arm64/kernel/head.o 52 53# The byte offset of the kernel image in RAM from the start of RAM. 54ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) 55TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}') 56else 57TEXT_OFFSET := 0x00080000 58endif 59 60# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61) 61# in 32-bit arithmetic 62KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \ 63 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \ 64 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \ 65 - (1 << (64 - 32 - 3)) )) ) 66 67export TEXT_OFFSET GZFLAGS 68 69core-y += arch/arm64/kernel/ arch/arm64/mm/ 70core-$(CONFIG_NET) += arch/arm64/net/ 71core-$(CONFIG_KVM) += arch/arm64/kvm/ 72core-$(CONFIG_XEN) += arch/arm64/xen/ 73core-$(CONFIG_CRYPTO) += arch/arm64/crypto/ 74libs-y := arch/arm64/lib/ $(libs-y) 75core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a 76 77# Default target when executing plain make 78KBUILD_IMAGE := Image.gz 79KBUILD_DTBS := dtbs 80 81all: $(KBUILD_IMAGE) $(KBUILD_DTBS) 82 83boot := arch/arm64/boot 84 85Image: vmlinux 86 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 87 88Image.%: vmlinux 89 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 90 91zinstall install: vmlinux 92 $(Q)$(MAKE) $(build)=$(boot) $@ 93 94%.dtb: scripts 95 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ 96 97PHONY += dtbs dtbs_install 98 99dtbs: prepare scripts 100 $(Q)$(MAKE) $(build)=$(boot)/dts 101 102dtbs_install: 103 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts 104 105PHONY += vdso_install 106vdso_install: 107 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ 108 109# We use MRPROPER_FILES and CLEAN_FILES now 110archclean: 111 $(Q)$(MAKE) $(clean)=$(boot) 112 $(Q)$(MAKE) $(clean)=$(boot)/dts 113 114define archhelp 115 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' 116 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' 117 echo '* dtbs - Build device tree blobs for enabled boards' 118 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)' 119 echo ' install - Install uncompressed kernel' 120 echo ' zinstall - Install compressed kernel' 121 echo ' Install using (your) ~/bin/installkernel or' 122 echo ' (distribution) /sbin/installkernel or' 123 echo ' install to $$(INSTALL_PATH) and run lilo' 124endef 125