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 16ifndef CONFIG_64BIT 17LDFLAGS := -m elf_s390 18CFLAGS += -m31 19AFLAGS += -m31 20UTS_MACHINE := s390 21STACK_SIZE := 8192 22CHECKFLAGS += -D__s390__ 23else 24LDFLAGS := -m elf64_s390 25MODFLAGS += -fpic -D__PIC__ 26CFLAGS += -m64 27AFLAGS += -m64 28UTS_MACHINE := s390x 29STACK_SIZE := 16384 30CHECKFLAGS += -D__s390__ -D__s390x__ 31endif 32 33cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5) 34cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900) 35cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990) 36cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109) 37 38#KBUILD_IMAGE is necessary for make rpm 39KBUILD_IMAGE :=arch/s390/boot/image 40 41# 42# Prevent tail-call optimizations, to get clearer backtraces: 43# 44cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 45 46# old style option for packed stacks 47ifeq ($(call cc-option-yn,-mkernel-backchain),y) 48cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK 49aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 50cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK 51aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK 52ifdef CONFIG_SMALL_STACK 53STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) ) 54endif 55endif 56 57# new style option for packed stacks 58ifeq ($(call cc-option-yn,-mpacked-stack),y) 59cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK 60aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 61cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK 62aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK 63ifdef CONFIG_SMALL_STACK 64STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) ) 65endif 66endif 67 68ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) 69cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) 70cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 71endif 72 73ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) 74cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack 75cflags-$(CONFIG_WARN_STACK) += -mwarn-framesize=$(CONFIG_WARN_STACK_SIZE) 76endif 77 78CFLAGS += -mbackchain -msoft-float $(cflags-y) 79CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare 80AFLAGS += $(aflags-y) 81 82OBJCOPYFLAGS := -O binary 83LDFLAGS_vmlinux := -e start 84 85head-y := arch/s390/kernel/head.o arch/s390/kernel/init_task.o 86 87core-y += arch/s390/mm/ arch/s390/kernel/ arch/s390/crypto/ \ 88 arch/s390/appldata/ arch/s390/hypfs/ 89libs-y += arch/s390/lib/ 90drivers-y += drivers/s390/ 91drivers-$(CONFIG_MATHEMU) += arch/s390/math-emu/ 92 93# must be linked after kernel 94drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/ 95 96boot := arch/s390/boot 97 98all: image 99 100install: vmlinux 101 $(Q)$(MAKE) $(build)=$(boot) $@ 102 103image: vmlinux 104 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 105 106archclean: 107 $(Q)$(MAKE) $(clean)=$(boot) 108 109# Don't use tabs in echo arguments 110define archhelp 111 echo '* image - Kernel image for IPL ($(boot)/image)' 112endef 113