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
28 KBUILD_CFLAGS_MODULE += -fPIC
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) += $(call cc-option,-march=z196)
44 cflags-$(CONFIG_MARCH_ZEC12) += $(call cc-option,-march=zEC12)
46 #KBUILD_IMAGE is necessary for make rpm
47 KBUILD_IMAGE :=arch/s390/boot/image
50 # Prevent tail-call optimizations, to get clearer backtraces:
52 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
54 # old style option for packed stacks
55 ifeq ($(call cc-option-yn,-mkernel-backchain),y)
56 cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -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 $$(($(STACK_SIZE)/2)) )
65 # new style option for packed stacks
66 ifeq ($(call cc-option-yn,-mpacked-stack),y)
67 cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
68 aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
69 cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
70 aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
71 ifdef CONFIG_SMALL_STACK
72 STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
76 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
77 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
78 ifneq ($(call cc-option-yn,-mstack-size=8192),y)
79 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
83 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
84 cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
87 KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
88 KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
89 KBUILD_AFLAGS += $(aflags-y)
91 OBJCOPYFLAGS := -O binary
93 head-y := arch/s390/kernel/head.o
94 head-y += arch/s390/kernel/$(if $(CONFIG_64BIT),head64.o,head31.o)
96 # See arch/s390/Kbuild for content of core part of the kernel
99 libs-y += arch/s390/lib/
100 drivers-y += drivers/s390/
102 # must be linked after kernel
103 drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
105 boot := arch/s390/boot
110 $(Q)$(MAKE) $(build)=$(boot) $@
112 image bzImage: vmlinux
113 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
116 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
119 ifeq ($(CONFIG_64BIT),y)
120 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
122 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
125 $(Q)$(MAKE) $(clean)=$(boot)
127 # Don't use tabs in echo arguments
129 echo '* image - Kernel image for IPL ($(boot)/image)'
130 echo '* bzImage - Compressed kernel image for IPL ($(boot)/bzImage)'