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) += $(call cc-option,-march=z990)
38 # Prevent tail-call optimizations, to get clearer backtraces:
40 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
42 # old style option for packed stacks
43 ifeq ($(call cc-option-yn,-mkernel-backchain),y)
44 cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
45 aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
46 cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
47 aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
48 ifdef CONFIG_SMALL_STACK
49 STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
53 # new style option for packed stacks
54 ifeq ($(call cc-option-yn,-mpacked-stack),y)
55 cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
56 aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
57 cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
58 aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
59 ifdef CONFIG_SMALL_STACK
60 STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
64 ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
65 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
66 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
69 ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
70 cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack
71 cflags-$(CONFIG_WARN_STACK) += -mwarn-framesize=$(CONFIG_WARN_STACK_SIZE)
74 CFLAGS += -mbackchain -msoft-float $(cflags-y)
75 CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
78 OBJCOPYFLAGS := -O binary
79 LDFLAGS_vmlinux := -e start
81 head-y := arch/$(ARCH)/kernel/head.o arch/$(ARCH)/kernel/init_task.o
83 core-y += arch/$(ARCH)/mm/ arch/$(ARCH)/kernel/ arch/$(ARCH)/crypto/ \
84 arch/$(ARCH)/appldata/ arch/$(ARCH)/hypfs/
85 libs-y += arch/$(ARCH)/lib/
86 drivers-y += drivers/s390/
87 drivers-$(CONFIG_MATHEMU) += arch/$(ARCH)/math-emu/
89 # must be linked after kernel
90 drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
92 boot := arch/$(ARCH)/boot
97 $(Q)$(MAKE) $(build)=$(boot) $@
100 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
103 $(Q)$(MAKE) $(clean)=$(boot)
105 # Don't use tabs in echo arguments
107 echo '* image - Kernel image for IPL ($(boot)/image)'