Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies. Remember to do have actions
# for "archclean" and "archdep" for cleaning up and making dependencies for
# this architecture.
#
# This file is subject to the terms and conditions of the GNU General Public
# License.  See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1994 by Linus Torvalds
# Changes for PPC by Gary Thomas
# Rewritten by Cort Dougan and Paul Mackerras
#

HAS_BIARCH      := $(call cc-option-yn, -m32)

# Set default 32 bits cross compilers for vdso and boot wrapper
CROSS32_COMPILE ?=

CROSS32CC               := $(CROSS32_COMPILE)gcc
CROSS32AS               := $(CROSS32_COMPILE)as
CROSS32LD               := $(CROSS32_COMPILE)ld
CROSS32AR               := $(CROSS32_COMPILE)ar
CROSS32OBJCOPY          := $(CROSS32_COMPILE)objcopy

ifeq ($(HAS_BIARCH),y)
ifeq ($(CROSS32_COMPILE),)
CROSS32CC       := $(CC) -m32
CROSS32AS       := $(AS) -a32
CROSS32LD       := $(LD) -m elf32ppc
CROSS32OBJCOPY  := $(OBJCOPY)
CROSS32AR       := GNUTARGET=elf32-powerpc $(AR)
endif
endif

export CROSS32CC CROSS32AS CROSS32LD CROSS32AR CROSS32OBJCOPY

ifeq ($(CROSS_COMPILE),)
KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
else
KBUILD_DEFCONFIG := ppc64_defconfig
endif

ifeq ($(CONFIG_PPC64),y)
OLDARCH := ppc64

new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)

ifeq ($(new_nm),y)
NM              := $(NM) --synthetic
endif

else
OLDARCH := ppc
endif

# It seems there are times we use this Makefile without
# including the config file, but this replicates the old behaviour
ifeq ($(CONFIG_WORD_SIZE),)
CONFIG_WORD_SIZE := 32
endif

UTS_MACHINE := $(OLDARCH)

ifeq ($(HAS_BIARCH),y)
override AS     += -a$(CONFIG_WORD_SIZE)
override LD     += -m elf$(CONFIG_WORD_SIZE)ppc
override CC     += -m$(CONFIG_WORD_SIZE)
override AR     := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
endif

LDFLAGS_vmlinux := -Bstatic

CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
AFLAGS-$(CONFIG_PPC32)  := -Iarch/$(ARCH)
CFLAGS-$(CONFIG_PPC64)  := -mminimal-toc -mtraceback=none  -mcall-aixdesc
CFLAGS-$(CONFIG_PPC32)  := -Iarch/$(ARCH) -ffixed-r2 -mmultiple
KBUILD_CPPFLAGS += $(CPPFLAGS-y)
KBUILD_AFLAGS   += $(AFLAGS-y)
KBUILD_CFLAGS   += -msoft-float -pipe $(CFLAGS-y)
CPP             = $(CC) -E $(KBUILD_CFLAGS)

CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__

ifeq ($(CONFIG_PPC64),y)
GCC_BROKEN_VEC  := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)

ifeq ($(CONFIG_POWER4_ONLY),y)
ifeq ($(CONFIG_ALTIVEC),y)
ifeq ($(GCC_BROKEN_VEC),y)
        KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
else
        KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
endif
else
        KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
endif
else
        KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
endif
endif

ifeq ($(CONFIG_TUNE_CELL),y)
        KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
endif

# No AltiVec instruction when building kernel
KBUILD_CFLAGS += $(call cc-option,-mno-altivec)

# No SPE instruction when building kernel
KBUILD_CFLAGS += $(call cc-option,-mno-spe)

# Enable unit-at-a-time mode when possible. It shrinks the
# kernel considerably.
KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)

# Never use string load/store instructions as they are
# often slow when they are implemented at all
KBUILD_CFLAGS           += -mno-string

ifeq ($(CONFIG_6xx),y)
KBUILD_CFLAGS           += -mcpu=powerpc
endif

cpu-as-$(CONFIG_4xx)            += -Wa,-m405
cpu-as-$(CONFIG_6xx)            += -Wa,-maltivec
cpu-as-$(CONFIG_POWER4)         += -Wa,-maltivec
cpu-as-$(CONFIG_E500)           += -Wa,-me500
cpu-as-$(CONFIG_E200)           += -Wa,-me200

KBUILD_AFLAGS += $(cpu-as-y)
KBUILD_CFLAGS += $(cpu-as-y)

head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o

head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o

core-y                          += arch/powerpc/kernel/ \
                                   arch/powerpc/mm/ \
                                   arch/powerpc/lib/ \
                                   arch/powerpc/sysdev/ \
                                   arch/powerpc/platforms/
core-$(CONFIG_MATH_EMULATION)   += arch/powerpc/math-emu/
core-$(CONFIG_XMON)             += arch/powerpc/xmon/

drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/

# Default to zImage, override when needed
defaultimage-y                  := zImage
defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
KBUILD_IMAGE := $(defaultimage-y)
all: $(KBUILD_IMAGE)

CPPFLAGS_vmlinux.lds    := -Upowerpc

BOOT_TARGETS = zImage zImage.initrd uImage

PHONY += $(BOOT_TARGETS)

boot := arch/$(ARCH)/boot

$(BOOT_TARGETS): vmlinux
        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)

define archhelp
  @echo '* zImage          - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
  @echo '  install         - Install kernel using'
  @echo '                    (your) ~/bin/installkernel or'
  @echo '                    (distribution) /sbin/installkernel or'
  @echo '                    install to $$(INSTALL_PATH) and run lilo'
  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
endef

install: vdso_install
        $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install

vdso_install:
ifeq ($(CONFIG_PPC64),y)
        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
endif
        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@

archclean:
        $(Q)$(MAKE) $(clean)=$(boot)

archprepare: checkbin

# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
# to stdout and these checks are run even on install targets.
TOUT    := .tmp_gas_check
# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
# instructions.
# gcc-3.4 and binutils-2.14 are a fatal combination.

checkbin:
        @if test "$(call cc-version)" = "0304" ; then \
                if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
                        echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
                        echo 'correctly with gcc-3.4 and your version of binutils.'; \
                        echo '*** Please upgrade your binutils or downgrade your gcc'; \
                        false; \
                fi ; \
        fi
        @if test "$(call cc-fullversion)" = "040200" \
            && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
                echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
                echo 'kernel with modules enabled.' ; \
                echo -n '*** Please use a different GCC version or ' ; \
                echo 'disable kernel modules' ; \
                false ; \
        fi
        @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
                echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
                echo 'correctly with old versions of binutils.' ; \
                echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
                false ; \
        fi

CLEAN_FILES += $(TOUT)