arch/s390/Makefile

   1 #
   2 # s390/Makefile
   3 #
   4 # This file is included by the global makefile so that you can add your own
   5 # architecture-specific flags and dependencies. Remember to do have actions
   6 # for "archclean" and "archdep" for cleaning up and making dependencies for
   7 # this architecture
   8 #
   9 # This file is subject to the terms and conditions of the GNU General Public
  10 # License.  See the file "COPYING" in the main directory of this archive
  11 # for more details.
  12 #
  13 # Copyright (C) 1994 by Linus Torvalds
  14 #
  15
  16 ifndef CONFIG_64BIT
  17 LDFLAGS         := -m elf_s390
  18 CFLAGS          += -m31
  19 AFLAGS          += -m31
  20 UTS_MACHINE     := s390
  21 STACK_SIZE      := 8192
  22 CHECKFLAGS      += -D__s390__
  23 else
  24 LDFLAGS         := -m elf64_s390
  25 MODFLAGS        += -fpic -D__PIC__
  26 CFLAGS          += -m64
  27 AFLAGS          += -m64
  28 UTS_MACHINE     := s390x
  29 STACK_SIZE      := 16384
  30 CHECKFLAGS      += -D__s390__ -D__s390x__
  31 endif
  32
  33 cflags-$(CONFIG_MARCH_G5)   += $(call cc-option,-march=g5)
  34 cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
  35 cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
  36 cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)
  37
  38 #
  39 # Prevent tail-call optimizations, to get clearer backtraces:
  40 #
  41 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
  42
  43 # old style option for packed stacks
  44 ifeq ($(call cc-option-yn,-mkernel-backchain),y)
  45 cflags-$(CONFIG_PACK_STACK)  += -mkernel-backchain -D__PACK_STACK
  46 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  47 cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
  48 aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
  49 ifdef CONFIG_SMALL_STACK
  50 STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
  51 endif
  52 endif
  53
  54 # new style option for packed stacks
  55 ifeq ($(call cc-option-yn,-mpacked-stack),y)
  56 cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
  57 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
  58 cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
  59 aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
  60 ifdef CONFIG_SMALL_STACK
  61 STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
  62 endif
  63 endif
  64
  65 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
  66 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
  67 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
  68 endif
  69
  70 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
  71 cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack
  72 cflags-$(CONFIG_WARN_STACK) += -mwarn-framesize=$(CONFIG_WARN_STACK_SIZE)
  73 endif
  74
  75 CFLAGS          += -mbackchain -msoft-float $(cflags-y)
  76 CFLAGS          += -pipe -fno-strength-reduce -Wno-sign-compare
  77 AFLAGS          += $(aflags-y)
  78
  79 OBJCOPYFLAGS    := -O binary
  80 LDFLAGS_vmlinux := -e start
  81
  82 head-y          := arch/$(ARCH)/kernel/head.o arch/$(ARCH)/kernel/init_task.o
  83
  84 core-y          += arch/$(ARCH)/mm/ arch/$(ARCH)/kernel/ arch/$(ARCH)/crypto/ \
  85                    arch/$(ARCH)/appldata/ arch/$(ARCH)/hypfs/
  86 libs-y          += arch/$(ARCH)/lib/
  87 drivers-y       += drivers/s390/
  88 drivers-$(CONFIG_MATHEMU) += arch/$(ARCH)/math-emu/
  89
  90 # must be linked after kernel
  91 drivers-$(CONFIG_OPROFILE)      += arch/s390/oprofile/
  92
  93 boot            := arch/$(ARCH)/boot
  94
  95 all: image
  96
  97 install: vmlinux
  98         $(Q)$(MAKE) $(build)=$(boot) $@
  99
 100 image: vmlinux
 101         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 102
 103 archclean:
 104         $(Q)$(MAKE) $(clean)=$(boot)
 105
 106 # Don't use tabs in echo arguments
 107 define archhelp
 108   echo  '* image           - Kernel image for IPL ($(boot)/image)'
 109 endef