arch/arm64/Makefile

   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
  13 LDFLAGS_vmlinux :=-p --no-undefined -X
  14 CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
  15 GZFLAGS         :=-9
  16
  17 ifneq ($(CONFIG_RELOCATABLE),)
  18 LDFLAGS_vmlinux         += -pie -Bsymbolic
  19 endif
  20
  21 KBUILD_DEFCONFIG := defconfig
  22
  23 # Check for binutils support for specific extensions
  24 lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
  25
  26 ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
  27   ifeq ($(lseinstr),)
  28 $(warning LSE atomics not supported by binutils)
  29   endif
  30 endif
  31
  32 KBUILD_CFLAGS   += -mgeneral-regs-only $(lseinstr)
  33 KBUILD_CFLAGS   += -fno-asynchronous-unwind-tables
  34 KBUILD_CFLAGS   += $(call cc-option, -mpc-relative-literal-loads)
  35 KBUILD_AFLAGS   += $(lseinstr)
  36
  37 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
  38 KBUILD_CPPFLAGS += -mbig-endian
  39 AS              += -EB
  40 LD              += -EB
  41 else
  42 KBUILD_CPPFLAGS += -mlittle-endian
  43 AS              += -EL
  44 LD              += -EL
  45 endif
  46
  47 CHECKFLAGS      += -D__aarch64__
  48
  49 ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
  50 KBUILD_CFLAGS_MODULE    += -mcmodel=large
  51 endif
  52
  53 ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
  54 KBUILD_LDFLAGS_MODULE   += -T $(srctree)/arch/arm64/kernel/module.lds
  55 endif
  56
  57 # Default value
  58 head-y          := arch/arm64/kernel/head.o
  59
  60 # The byte offset of the kernel image in RAM from the start of RAM.
  61 ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
  62 TEXT_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))}")
  65 else
  66 TEXT_OFFSET := 0x00080000
  67 endif
  68
  69 # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
  70 # in 32-bit arithmetic
  71 KASAN_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
  76 export  TEXT_OFFSET GZFLAGS
  77
  78 core-y          += arch/arm64/kernel/ arch/arm64/mm/
  79 core-$(CONFIG_NET) += arch/arm64/net/
  80 core-$(CONFIG_KVM) += arch/arm64/kvm/
  81 core-$(CONFIG_XEN) += arch/arm64/xen/
  82 core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
  83 libs-y          := arch/arm64/lib/ $(libs-y)
  84 core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
  85
  86 # Default target when executing plain make
  87 KBUILD_IMAGE    := Image.gz
  88 KBUILD_DTBS     := dtbs
  89
  90 all:    $(KBUILD_IMAGE) $(KBUILD_DTBS)
  91
  92 boot := arch/arm64/boot
  93
  94 Image: vmlinux
  95         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
  96
  97 Image.%: Image
  98         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
  99
 100 zinstall install:
 101         $(Q)$(MAKE) $(build)=$(boot) $@
 102
 103 %.dtb: scripts
 104         $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
 105
 106 PHONY += dtbs dtbs_install
 107
 108 dtbs: prepare scripts
 109         $(Q)$(MAKE) $(build)=$(boot)/dts
 110
 111 dtbs_install:
 112         $(Q)$(MAKE) $(dtbinst)=$(boot)/dts
 113
 114 PHONY += vdso_install
 115 vdso_install:
 116         $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
 117
 118 # We use MRPROPER_FILES and CLEAN_FILES now
 119 archclean:
 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.
 129 prepare: vdso_prepare
 130 vdso_prepare: prepare0
 131         $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h
 132
 133 define 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'
 143 endef