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
16LD_BFD		:= elf64-s390
17LDFLAGS		:= -m elf64_s390
18KBUILD_AFLAGS_MODULE += -fPIC
19KBUILD_CFLAGS_MODULE += -fPIC
20KBUILD_CFLAGS	+= -m64
21KBUILD_AFLAGS	+= -m64
22UTS_MACHINE	:= s390x
23STACK_SIZE	:= 16384
24CHECKFLAGS	+= -D__s390__ -D__s390x__
25
26export LD_BFD
27
28mflags-$(CONFIG_MARCH_Z900)   := -march=z900
29mflags-$(CONFIG_MARCH_Z990)   := -march=z990
30mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
31mflags-$(CONFIG_MARCH_Z10)    := -march=z10
32mflags-$(CONFIG_MARCH_Z196)   := -march=z196
33mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
34mflags-$(CONFIG_MARCH_Z13)   := -march=z13
35
36export CC_FLAGS_MARCH := $(mflags-y)
37
38aflags-y += $(mflags-y)
39cflags-y += $(mflags-y)
40
41cflags-$(CONFIG_MARCH_Z900_TUNE)	+= -mtune=z900
42cflags-$(CONFIG_MARCH_Z990_TUNE)	+= -mtune=z990
43cflags-$(CONFIG_MARCH_Z9_109_TUNE)	+= -mtune=z9-109
44cflags-$(CONFIG_MARCH_Z10_TUNE)		+= -mtune=z10
45cflags-$(CONFIG_MARCH_Z196_TUNE)	+= -mtune=z196
46cflags-$(CONFIG_MARCH_ZEC12_TUNE)	+= -mtune=zEC12
47cflags-$(CONFIG_MARCH_Z13_TUNE)	+= -mtune=z13
48
49#KBUILD_IMAGE is necessary for make rpm
50KBUILD_IMAGE	:=arch/s390/boot/image
51
52#
53# Prevent tail-call optimizations, to get clearer backtraces:
54#
55cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
56
57# old style option for packed stacks
58ifeq ($(call cc-option-yn,-mkernel-backchain),y)
59cflags-$(CONFIG_PACK_STACK)  += -mkernel-backchain -D__PACK_STACK
60aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
61endif
62
63# new style option for packed stacks
64ifeq ($(call cc-option-yn,-mpacked-stack),y)
65cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
66aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
67endif
68
69ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
70cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
71ifneq ($(call cc-option-yn,-mstack-size=8192),y)
72cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
73endif
74endif
75
76ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
77cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
78endif
79
80ifdef CONFIG_FUNCTION_TRACER
81# make use of hotpatch feature if the compiler supports it
82cc_hotpatch	:= -mhotpatch=0,3
83ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
84CC_FLAGS_FTRACE := $(cc_hotpatch)
85KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
86KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
87endif
88endif
89
90KBUILD_CFLAGS	+= -mbackchain -msoft-float $(cflags-y)
91KBUILD_CFLAGS	+= -pipe -fno-strength-reduce -Wno-sign-compare
92KBUILD_AFLAGS	+= $(aflags-y)
93
94OBJCOPYFLAGS	:= -O binary
95
96head-y		:= arch/s390/kernel/head.o
97head-y		+= arch/s390/kernel/head64.o
98
99# See arch/s390/Kbuild for content of core part of the kernel
100core-y		+= arch/s390/
101
102libs-y		+= arch/s390/lib/
103drivers-y	+= drivers/s390/
104
105# must be linked after kernel
106drivers-$(CONFIG_OPROFILE)	+= arch/s390/oprofile/
107
108boot		:= arch/s390/boot
109
110all: image bzImage
111
112install: vmlinux
113	$(Q)$(MAKE) $(build)=$(boot) $@
114
115image bzImage: vmlinux
116	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
117
118zfcpdump:
119	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
120
121vdso_install:
122	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
123	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
124
125archclean:
126	$(Q)$(MAKE) $(clean)=$(boot)
127
128# Don't use tabs in echo arguments
129define archhelp
130  echo  '* image           - Kernel image for IPL ($(boot)/image)'
131  echo	'* bzImage         - Compressed kernel image for IPL ($(boot)/bzImage)'
132endef
133