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) += $(call cc-option,-march=z990) 36 37# 38# Prevent tail-call optimizations, to get clearer backtraces: 39# 40cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls 41 42# old style option for packed stacks 43ifeq ($(call cc-option-yn,-mkernel-backchain),y) 44cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK 45aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 46cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK 47aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK 48ifdef CONFIG_SMALL_STACK 49STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) ) 50endif 51endif 52 53# new style option for packed stacks 54ifeq ($(call cc-option-yn,-mpacked-stack),y) 55cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK 56aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK 57cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK 58aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK 59ifdef CONFIG_SMALL_STACK 60STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) ) 61endif 62endif 63 64ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) 65cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) 66cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 67endif 68 69ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) 70cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack 71cflags-$(CONFIG_WARN_STACK) += -mwarn-framesize=$(CONFIG_WARN_STACK_SIZE) 72endif 73 74CFLAGS += -mbackchain -msoft-float $(cflags-y) 75CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare 76AFLAGS += $(aflags-y) 77 78OBJCOPYFLAGS := -O binary 79LDFLAGS_vmlinux := -e start 80 81head-y := arch/$(ARCH)/kernel/head.o arch/$(ARCH)/kernel/init_task.o 82 83core-y += arch/$(ARCH)/mm/ arch/$(ARCH)/kernel/ arch/$(ARCH)/crypto/ \ 84 arch/$(ARCH)/appldata/ arch/$(ARCH)/hypfs/ 85libs-y += arch/$(ARCH)/lib/ 86drivers-y += drivers/s390/ 87drivers-$(CONFIG_MATHEMU) += arch/$(ARCH)/math-emu/ 88 89# must be linked after kernel 90drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/ 91 92boot := arch/$(ARCH)/boot 93 94all: image 95 96install: vmlinux 97 $(Q)$(MAKE) $(build)=$(boot) $@ 98 99image: vmlinux 100 $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ 101 102archclean: 103 $(Q)$(MAKE) $(clean)=$(boot) 104 105# Don't use tabs in echo arguments 106define archhelp 107 echo '* image - Kernel image for IPL ($(boot)/image)' 108endef 109