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=$(TEXT_OFFSET) 15OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S 16GZFLAGS :=-9 17 18ifneq ($(CONFIG_RELOCATABLE),) 19LDFLAGS_vmlinux += -pie 20endif 21 22KBUILD_DEFCONFIG := defconfig 23 24# Check for binutils support for specific extensions 25lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1) 26 27ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y) 28 ifeq ($(lseinstr),) 29$(warning LSE atomics not supported by binutils) 30 endif 31endif 32 33KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) 34KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 35KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) 36KBUILD_AFLAGS += $(lseinstr) 37 38ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) 39KBUILD_CPPFLAGS += -mbig-endian 40AS += -EB 41LD += -EB 42else 43KBUILD_CPPFLAGS += -mlittle-endian 44AS += -EL 45LD += -EL 46endif 47 48CHECKFLAGS += -D__aarch64__ 49 50ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y) 51KBUILD_CFLAGS_MODULE += -mcmodel=large 52endif 53 54ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) 55KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds 56endif 57 58# Default value 59head-y := arch/arm64/kernel/head.o 60 61# The byte offset of the kernel image in RAM from the start of RAM. 62ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) 63TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \ 64 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \ 65 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}") 66else 67TEXT_OFFSET := 0x00080000 68endif 69 70# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61) 71# in 32-bit arithmetic 72KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \ 73 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \ 74 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \ 75 - (1 << (64 - 32 - 3)) )) ) 76 77export TEXT_OFFSET GZFLAGS 78 79core-y += arch/arm64/kernel/ arch/arm64/mm/ 80core-$(CONFIG_NET) += arch/arm64/net/ 81core-$(CONFIG_KVM) += arch/arm64/kvm/ 82core-$(CONFIG_XEN) += arch/arm64/xen/ 83core-$(CONFIG_CRYPTO) += arch/arm64/crypto/ 84libs-y := arch/arm64/lib/ $(libs-y) 85core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a 86 87# Default target when executing plain make 88KBUILD_IMAGE := Image.gz 89KBUILD_DTBS := dtbs 90 91all: $(KBUILD_IMAGE) $(KBUILD_DTBS) 92 93boot := arch/arm64/boot 94 95Image: vmlinux 96 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 97 98Image.%: Image 99 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 100 101zinstall install: 102 $(Q)$(MAKE) $(build)=$(boot) $@ 103 104%.dtb: scripts 105 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ 106 107PHONY += dtbs dtbs_install 108 109dtbs: prepare scripts 110 $(Q)$(MAKE) $(build)=$(boot)/dts 111 112dtbs_install: 113 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts 114 115PHONY += vdso_install 116vdso_install: 117 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ 118 119# We use MRPROPER_FILES and CLEAN_FILES now 120archclean: 121 $(Q)$(MAKE) $(clean)=$(boot) 122 $(Q)$(MAKE) $(clean)=$(boot)/dts 123 124define archhelp 125 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' 126 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' 127 echo '* dtbs - Build device tree blobs for enabled boards' 128 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)' 129 echo ' install - Install uncompressed kernel' 130 echo ' zinstall - Install compressed kernel' 131 echo ' Install using (your) ~/bin/installkernel or' 132 echo ' (distribution) /sbin/installkernel or' 133 echo ' install to $$(INSTALL_PATH) and run lilo' 134endef 135