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 -shared -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 40ifeq ($(CONFIG_ARM64), y) 41brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1) 42 43 ifneq ($(brokengasinst),) 44$(warning Detected assembler with broken .inst; disassembly will be unreliable) 45 endif 46endif 47 48KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) 49KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 50KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) 51KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) 52 53ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) 54KBUILD_CPPFLAGS += -mbig-endian 55AS += -EB 56LD += -EB 57UTS_MACHINE := aarch64_be 58else 59KBUILD_CPPFLAGS += -mlittle-endian 60AS += -EL 61LD += -EL 62UTS_MACHINE := aarch64 63endif 64 65CHECKFLAGS += -D__aarch64__ 66 67ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y) 68KBUILD_CFLAGS_MODULE += -mcmodel=large 69endif 70 71ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) 72KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds 73endif 74 75# Default value 76head-y := arch/arm64/kernel/head.o 77 78# The byte offset of the kernel image in RAM from the start of RAM. 79ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) 80TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \ 81 int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \ 82 rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}") 83else 84TEXT_OFFSET := 0x00080000 85endif 86 87# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61) 88# in 32-bit arithmetic 89KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \ 90 (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \ 91 + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \ 92 - (1 << (64 - 32 - 3)) )) ) 93 94export TEXT_OFFSET GZFLAGS 95 96core-y += arch/arm64/kernel/ arch/arm64/mm/ 97core-$(CONFIG_NET) += arch/arm64/net/ 98core-$(CONFIG_KVM) += arch/arm64/kvm/ 99core-$(CONFIG_XEN) += arch/arm64/xen/ 100core-$(CONFIG_CRYPTO) += arch/arm64/crypto/ 101libs-y := arch/arm64/lib/ $(libs-y) 102core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a 103 104# Default target when executing plain make 105KBUILD_IMAGE := Image.gz 106KBUILD_DTBS := dtbs 107 108all: $(KBUILD_IMAGE) $(KBUILD_DTBS) 109 110boot := arch/arm64/boot 111 112Image: vmlinux 113 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 114 115Image.%: Image 116 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 117 118zinstall install: 119 $(Q)$(MAKE) $(build)=$(boot) $@ 120 121%.dtb: scripts 122 $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ 123 124PHONY += dtbs dtbs_install 125 126dtbs: prepare scripts 127 $(Q)$(MAKE) $(build)=$(boot)/dts 128 129dtbs_install: 130 $(Q)$(MAKE) $(dtbinst)=$(boot)/dts 131 132PHONY += vdso_install 133vdso_install: 134 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ 135 136# We use MRPROPER_FILES and CLEAN_FILES now 137archclean: 138 $(Q)$(MAKE) $(clean)=$(boot) 139 $(Q)$(MAKE) $(clean)=$(boot)/dts 140 141# We need to generate vdso-offsets.h before compiling certain files in kernel/. 142# In order to do that, we should use the archprepare target, but we can't since 143# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 144# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 145# Therefore we need to generate the header after prepare0 has been made, hence 146# this hack. 147prepare: vdso_prepare 148vdso_prepare: prepare0 149 $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h 150 151define archhelp 152 echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' 153 echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' 154 echo '* dtbs - Build device tree blobs for enabled boards' 155 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)' 156 echo ' install - Install uncompressed kernel' 157 echo ' zinstall - Install compressed kernel' 158 echo ' Install using (your) ~/bin/installkernel or' 159 echo ' (distribution) /sbin/installkernel or' 160 echo ' install to $$(INSTALL_PATH) and run lilo' 161endef 162