#
  # s390/Makefile
  #
  # This file is included by the global makefile so that you can add your own
  # architecture-specific flags and dependencies. Remember to do have actions
  # for "archclean" and "archdep" for cleaning up and making dependencies for
  # this architecture
  #
  # This file is subject to the terms and conditions of the GNU General Public
  # License.  See the file "COPYING" in the main directory of this archive
  # for more details.
  #
  # Copyright (C) 1994 by Linus Torvalds
  #

  LD_BFD		:= elf64-s390

  LDFLAGS		:= -m elf64_s390

  KBUILD_AFLAGS_MODULE += -fPIC
  KBUILD_CFLAGS_MODULE += -fPIC

  KBUILD_CFLAGS	+= -m64

  KBUILD_AFLAGS	+= -m64

  UTS_MACHINE	:= s390x
  STACK_SIZE	:= 16384

  CHECKFLAGS	+= -D__s390__ -D__s390x__

  export LD_BFD

  mflags-$(CONFIG_MARCH_Z900)   := -march=z900
  mflags-$(CONFIG_MARCH_Z990)   := -march=z990
  mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
  mflags-$(CONFIG_MARCH_Z10)    := -march=z10
  mflags-$(CONFIG_MARCH_Z196)   := -march=z196
  mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12

  mflags-$(CONFIG_MARCH_Z13)    := -march=z13
  mflags-$(CONFIG_MARCH_Z14)    := -march=z14

  export CC_FLAGS_MARCH := $(mflags-y)

  aflags-y += $(mflags-y)
  cflags-y += $(mflags-y)

  cflags-$(CONFIG_MARCH_Z900_TUNE)	+= -mtune=z900
  cflags-$(CONFIG_MARCH_Z990_TUNE)	+= -mtune=z990
  cflags-$(CONFIG_MARCH_Z9_109_TUNE)	+= -mtune=z9-109
  cflags-$(CONFIG_MARCH_Z10_TUNE)		+= -mtune=z10
  cflags-$(CONFIG_MARCH_Z196_TUNE)	+= -mtune=z196
  cflags-$(CONFIG_MARCH_ZEC12_TUNE)	+= -mtune=zEC12

  cflags-$(CONFIG_MARCH_Z13_TUNE)		+= -mtune=z13
  cflags-$(CONFIG_MARCH_Z14_TUNE)		+= -mtune=z14

  cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include

  #KBUILD_IMAGE is necessary for make rpm
  KBUILD_IMAGE	:=arch/s390/boot/image

  #
  # Prevent tail-call optimizations, to get clearer backtraces:
  #
  cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls

  # old style option for packed stacks
  ifeq ($(call cc-option-yn,-mkernel-backchain),y)
  cflags-$(CONFIG_PACK_STACK)  += -mkernel-backchain -D__PACK_STACK
  aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK

  endif
  
  # new style option for packed stacks
  ifeq ($(call cc-option-yn,-mpacked-stack),y)
  cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
  aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK

  endif
  
  ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
  cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)

  ifneq ($(call cc-option-yn,-mstack-size=8192),y)

  cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
  endif

  endif

  
  ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)

  cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack

  endif

  ifdef CONFIG_EXPOLINE
    ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
      CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
      CC_FLAGS_EXPOLINE += -mfunction-return=thunk
      CC_FLAGS_EXPOLINE += -mindirect-branch-table
      export CC_FLAGS_EXPOLINE

      cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE

    endif
  endif

  ifdef CONFIG_FUNCTION_TRACER
  # make use of hotpatch feature if the compiler supports it
  cc_hotpatch	:= -mhotpatch=0,3
  ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
  CC_FLAGS_FTRACE := $(cc_hotpatch)
  KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
  KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
  endif
  endif

  KBUILD_CFLAGS	+= -mbackchain -msoft-float $(cflags-y)
  KBUILD_CFLAGS	+= -pipe -fno-strength-reduce -Wno-sign-compare

  KBUILD_AFLAGS	+= $(aflags-y)

  
  OBJCOPYFLAGS	:= -O binary

  head-y		:= arch/s390/kernel/head.o

  head-y		+= arch/s390/kernel/head64.o

  # See arch/s390/Kbuild for content of core part of the kernel
  core-y		+= arch/s390/

  libs-y		+= arch/s390/lib/

  drivers-y	+= drivers/s390/

  
  # must be linked after kernel
  drivers-$(CONFIG_OPROFILE)	+= arch/s390/oprofile/

  boot		:= arch/s390/boot

  tools		:= arch/s390/tools

  all: image bzImage

  
  install: vmlinux
  	$(Q)$(MAKE) $(build)=$(boot) $@

  image bzImage: vmlinux

  	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

  zfcpdump:
  	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

  vdso_install:

  	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@

  	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@

  archclean:
  	$(Q)$(MAKE) $(clean)=$(boot)

  	$(Q)$(MAKE) $(clean)=$(tools)
  
  archprepare:
  	$(Q)$(MAKE) $(build)=$(tools) include/generated/facilities.h

  # Don't use tabs in echo arguments
  define archhelp
    echo  '* image           - Kernel image for IPL ($(boot)/image)'

    echo	'* bzImage         - Compressed kernel image for IPL ($(boot)/bzImage)'

    echo	'  install         - Install kernel using'
    echo	'                    (your) ~/bin/$(INSTALLKERNEL) or'
    echo	'                    (distribution) /sbin/$(INSTALLKERNEL) or'
    echo	'                    install to $$(INSTALL_PATH)'

  endef