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
17 LDFLAGS := -m elf_s390
22 CHECKFLAGS += -D__s390__
24 LDFLAGS := -m elf64_s390
25 MODFLAGS += -fpic -D__PIC__
30 CHECKFLAGS += -D__s390__ -D__s390x__
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) += $(call cc-option,-march=z9-109)
38 #KBUILD_IMAGE is necessary for make rpm
39 KBUILD_IMAGE :=arch/s390/boot/image
42 # Prevent tail-call optimizations, to get clearer backtraces:
44 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
46 # old style option for packed stacks
47 ifeq ($(call cc-option-yn,-mkernel-backchain),y)
48 cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
49 aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
50 cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
51 aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
52 ifdef CONFIG_SMALL_STACK
53 STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
57 # new style option for packed stacks
58 ifeq ($(call cc-option-yn,-mpacked-stack),y)
59 cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
60 aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
61 cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
62 aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
63 ifdef CONFIG_SMALL_STACK
64 STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
68 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
69 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
70 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
73 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
74 cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack
75 cflags-$(CONFIG_WARN_STACK) += -mwarn-framesize=$(CONFIG_WARN_STACK_SIZE)
78 CFLAGS += -mbackchain -msoft-float $(cflags-y)
79 CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
82 OBJCOPYFLAGS := -O binary
83 LDFLAGS_vmlinux := -e start
85 head-y := arch/s390/kernel/head.o arch/s390/kernel/init_task.o
87 core-y += arch/s390/mm/ arch/s390/kernel/ arch/s390/crypto/ \
88 arch/s390/appldata/ arch/s390/hypfs/
89 libs-y += arch/s390/lib/
90 drivers-y += drivers/s390/
91 drivers-$(CONFIG_MATHEMU) += arch/s390/math-emu/
93 # must be linked after kernel
94 drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
96 boot := arch/s390/boot
101 $(Q)$(MAKE) $(build)=$(boot) $@
104 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
107 $(Q)$(MAKE) $(clean)=$(boot)
109 # Don't use tabs in echo arguments
111 echo '* image - Kernel image for IPL ($(boot)/image)'