#
  # 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
  #

  ifndef CONFIG_64BIT

  LD_BFD		:= elf32-s390

  LDFLAGS		:= -m elf_s390

  KBUILD_CFLAGS	+= -m31

  KBUILD_AFLAGS	+= -m31

  UTS_MACHINE	:= s390
  STACK_SIZE	:= 8192

  CHECKFLAGS	+= -D__s390__ -msize-long

  else

  LD_BFD		:= elf64-s390

  LDFLAGS		:= -m elf64_s390

  KBUILD_AFLAGS_MODULE += -fpic -D__PIC__
  KBUILD_CFLAGS_MODULE += -fpic -D__PIC__

  KBUILD_CFLAGS	+= -m64

  KBUILD_AFLAGS	+= -m64

  UTS_MACHINE	:= s390x
  STACK_SIZE	:= 16384

  CHECKFLAGS	+= -D__s390__ -D__s390x__

  endif

  export LD_BFD

  cflags-$(CONFIG_MARCH_G5)   += $(call cc-option,-march=g5)
  cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
  cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)

  cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)

  cflags-$(CONFIG_MARCH_Z10) += $(call cc-option,-march=z10)

  cflags-$(CONFIG_MARCH_Z196) += $(call cc-option,-march=z196)

  #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-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
  aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
  ifdef CONFIG_SMALL_STACK
  STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
  endif
  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-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
  aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
  ifdef CONFIG_SMALL_STACK
  STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
  endif
  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

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

  KBUILD_AFLAGS	+= $(aflags-y)

  
  OBJCOPYFLAGS	:= -O binary
  LDFLAGS_vmlinux := -e start

  head-y		:= arch/s390/kernel/head.o
  head-y		+= arch/s390/kernel/$(if $(CONFIG_64BIT),head64.o,head31.o)
  head-y		+= arch/s390/kernel/init_task.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

  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:
  ifeq ($(CONFIG_64BIT),y)
  	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
  endif
  	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@

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

  # 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)'

  endef