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
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
13 # Copyright (C) 1994 by Linus Torvalds
18 LDFLAGS := -m elf_s390
23 CHECKFLAGS += -D__s390__ -msize-long
26 LDFLAGS := -m elf64_s390
27 KBUILD_AFLAGS_MODULE += -fpic -D__PIC__
28 KBUILD_CFLAGS_MODULE += -fpic -D__PIC__
33 CHECKFLAGS += -D__s390__ -D__s390x__
38 cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5)
39 cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
40 cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
41 cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)
42 cflags-$(CONFIG_MARCH_Z10) += $(call cc-option,-march=z10)
43 cflags-$(CONFIG_MARCH_Z196) += $(call cc-option,-march=z196)
45 #KBUILD_IMAGE is necessary for make rpm
46 KBUILD_IMAGE :=arch/s390/boot/image
49 # Prevent tail-call optimizations, to get clearer backtraces:
51 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
53 # old style option for packed stacks
54 ifeq ($(call cc-option-yn,-mkernel-backchain),y)
55 cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
56 aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
57 cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
58 aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
59 ifdef CONFIG_SMALL_STACK
60 STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
64 # new style option for packed stacks
65 ifeq ($(call cc-option-yn,-mpacked-stack),y)
66 cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
67 aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
68 cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
69 aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
70 ifdef CONFIG_SMALL_STACK
71 STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
75 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
76 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
77 ifneq ($(call cc-option-yn,-mstack-size=8192),y)
78 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
82 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
83 cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
86 KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
87 KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
88 KBUILD_AFLAGS += $(aflags-y)
90 OBJCOPYFLAGS := -O binary
91 LDFLAGS_vmlinux := -e start
93 head-y := arch/s390/kernel/head.o
94 head-y += arch/s390/kernel/$(if $(CONFIG_64BIT),head64.o,head31.o)
95 head-y += arch/s390/kernel/init_task.o
97 # See arch/s390/Kbuild for content of core part of the kernel
100 libs-y += arch/s390/lib/
101 drivers-y += drivers/s390/
102 drivers-$(CONFIG_MATHEMU) += arch/s390/math-emu/
104 # must be linked after kernel
105 drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
107 boot := arch/s390/boot
112 $(Q)$(MAKE) $(build)=$(boot) $@
114 image bzImage: vmlinux
115 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
118 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
121 ifeq ($(CONFIG_64BIT),y)
122 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
124 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
127 $(Q)$(MAKE) $(clean)=$(boot)
129 # Don't use tabs in echo arguments
131 echo '* image - Kernel image for IPL ($(boot)/image)'
132 echo '* bzImage - Compressed kernel image for IPL ($(boot)/bzImage)'