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