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=$(TEXT_OFFSET) 15GZFLAGS :=-9 16 17ifeq ($(CONFIG_RELOCATABLE), y) 18# Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour 19# for relative relocs, since this leads to better Image compression 20# with the relocation offsets always being zero. 21LDFLAGS_vmlinux += -pie -shared -Bsymbolic \ 22 $(call ld-option, --no-apply-dynamic-relocs) 23endif 24 25ifeq ($(CONFIG_ARM64_ERRATUM_843419),y) 26 ifeq ($(call ld-option, --fix-cortex-a53-843419),) 27$(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum) 28 else 29LDFLAGS_vmlinux += --fix-cortex-a53-843419 30 endif 31endif 32 33KBUILD_DEFCONFIG := defconfig 34 35# Check for binutils support for specific extensions 36lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1) 37 38ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y) 39 ifeq ($(lseinstr),) 40$(warning LSE atomics not supported by binutils) 41 endif 42endif 43 44ifeq ($(CONFIG_ARM64), y) 45brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1) 46 47 ifneq ($(brokengasinst),) 48$(warning Detected assembler with broken .inst; disassembly will be unreliable) 49 endif 50endif 51 52KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) 53KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 54KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) 55KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) 56 57KBUILD_CFLAGS += $(call cc-option,-mabi=lp64) 58KBUILD_AFLAGS += $(call cc-option,-mabi=lp64) 59 60KBUILD_CFLAGS += $(call cc-ifversion, -ge, 0500, -DCONFIG_ARCH_SUPPORTS_INT128) 61 62ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) 63KBUILD_CPPFLAGS += -mbig-endian 64CHECKFLAGS += -D__AARCH64EB__ 65AS += -EB 66LD += -EB 67LDFLAGS += -maarch64linuxb 68UTS_MACHINE := aarch64_be 69else 70KBUILD_CPPFLAGS += -mlittle-endian 71CHECKFLAGS += -D__AARCH64EL__ 72AS += -EL 73LD += -EL 74LDFLAGS += -maarch64linux 75UTS_MACHINE := aarch64 76endif 77 78CHECKFLAGS += -D__aarch64__ -m64 79 80ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y) 81KBUILD_CFLAGS_MODULE += -mcmodel=large 82endif 83 84ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) 85KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds 86ifeq ($(CONFIG_DYNAMIC_FTRACE),y) 87KBUILD_LDFLAGS_MODULE += $(objtree)/arch/arm64/kernel/ftrace-mod.o 88endif 89endif 90 91# Default value 92head-y := arch/arm64/kernel/head.o 93 94# The byte offset of the kernel image in RAM from the start of RAM. 95ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) 96TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \ 97 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \ 98 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}") 99else 100TEXT_OFFSET := 0x00080000 101endif 102 103# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61) 104# in 32-bit arithmetic 105KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \ 106 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \ 107 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \ 108 - (1 << (64 - 32 - 3)) )) ) 109 110export TEXT_OFFSET GZFLAGS 111 112core-y += arch/arm64/kernel/ arch/arm64/mm/ 113core-$(CONFIG_NET) += arch/arm64/net/ 114core-$(CONFIG_KVM) += arch/arm64/kvm/ 115core-$(CONFIG_XEN) += arch/arm64/xen/ 116core-$(CONFIG_CRYPTO) += arch/arm64/crypto/ 117libs-y := arch/arm64/lib/ $(libs-y) 118core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a 119 120# Default target when executing plain make 121boot := arch/arm64/boot 122KBUILD_IMAGE := $(boot)/Image.gz 123KBUILD_DTBS := dtbs 124 125all: Image.gz $(KBUILD_DTBS) 126 127 128Image: vmlinux 129 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 130 131Image.%: Image 132 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 133 134zinstall install: 135 $(Q)$(MAKE) $(build)=$(boot) $@ 136 137%.dtb: scripts 138 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ 139 140PHONY += dtbs dtbs_install 141 142dtbs: prepare scripts 143 $(Q)$(MAKE) $(build)=$(boot)/dts 144 145dtbs_install: 146 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts 147 148PHONY += vdso_install 149vdso_install: 150 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ 151 152# We use MRPROPER_FILES and CLEAN_FILES now 153archclean: 154 $(Q)$(MAKE) $(clean)=$(boot) 155 $(Q)$(MAKE) $(clean)=$(boot)/dts 156 157# We need to generate vdso-offsets.h before compiling certain files in kernel/. 158# In order to do that, we should use the archprepare target, but we can't since 159# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 160# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 161# Therefore we need to generate the header after prepare0 has been made, hence 162# this hack. 163prepare: vdso_prepare 164vdso_prepare: prepare0 165 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h 166 167define archhelp 168 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' 169 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' 170 echo '* dtbs - Build device tree blobs for enabled boards' 171 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)' 172 echo ' install - Install uncompressed kernel' 173 echo ' zinstall - Install compressed kernel' 174 echo ' Install using (your) ~/bin/installkernel or' 175 echo ' (distribution) /sbin/installkernel or' 176 echo ' install to $$(INSTALL_PATH) and run lilo' 177endef 178