[linux-2.6-block.git] / arch / arc / Makefile

#
# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#

UTS_MACHINE := arc

ifeq ($(CROSS_COMPILE),)
CROSS_COMPILE := arc-linux-uclibc-
endif

KBUILD_DEFCONFIG := fpga_defconfig

cflags-y	+= -mA7 -fno-common -pipe -fno-builtin -D__linux__

ifdef CONFIG_ARC_CURR_IN_REG
# For a global register defintion, make sure it gets passed to every file
# We had a customer reported bug where some code built in kernel was NOT using
# any kernel headers, and missing the r25 global register
# Can't do unconditionally because of recursive include issues
# due to <linux/thread_info.h>
LINUXINCLUDE	+=  -include ${src}/arch/arc/include/asm/current.h
endif

upto_gcc42    :=  $(call cc-ifversion, -le, 0402, y)
upto_gcc44    :=  $(call cc-ifversion, -le, 0404, y)
atleast_gcc44 :=  $(call cc-ifversion, -ge, 0404, y)
atleast_gcc48 :=  $(call cc-ifversion, -ge, 0408, y)

cflags-$(atleast_gcc44)			+= -fsection-anchors

cflags-$(CONFIG_ARC_HAS_LLSC)		+= -mlock
cflags-$(CONFIG_ARC_HAS_SWAPE)		+= -mswape
cflags-$(CONFIG_ARC_HAS_RTSC)		+= -mrtsc
cflags-$(CONFIG_ARC_DW2_UNWIND)		+= -fasynchronous-unwind-tables

# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
ifeq ($(atleast_gcc48),y)
cflags-$(CONFIG_ARC_DW2_UNWIND)		+= -gdwarf-2
endif

ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
# Generic build system uses -O2, we want -O3
cflags-y  += -O3
endif

# small data is default for elf32 tool-chain. If not usable, disable it
# This also allows repurposing GP as scratch reg to gcc reg allocator
disable_small_data := y
cflags-$(disable_small_data)		+= -mno-sdata -fcall-used-gp

cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= -mbig-endian
ldflags-$(CONFIG_CPU_BIG_ENDIAN)	+= -EB

# STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
# --build-id w/o "-marclinux". Default arc-elf32-ld is OK
ldflags-$(upto_gcc44)			+= -marclinux

ARC_LIBGCC				:= -mA7
cflags-$(CONFIG_ARC_HAS_HW_MPY)		+= -multcost=16

ifndef CONFIG_ARC_HAS_HW_MPY
	cflags-y	+= -mno-mpy

# newlib for ARC700 assumes MPY to be always present, which is generally true
# However, if someone really doesn't want MPY, we need to use the 600 ver
# which coupled with -mno-mpy will use mpy emulation
# With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments,
# e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted

	ifeq ($(upto_gcc42),y)
		ARC_LIBGCC	:= -marc600
		cflags-y	+= -multcost=30
	endif
endif

LIBGCC	:= $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name)

# Modules with short calls might break for calls into builtin-kernel
KBUILD_CFLAGS_MODULE	+= -mlong-calls

# Finally dump eveything into kernel build system
KBUILD_CFLAGS	+= $(cflags-y)
KBUILD_AFLAGS	+= $(KBUILD_CFLAGS)
LDFLAGS		+= $(ldflags-y)

head-y		:= arch/arc/kernel/head.o

# See arch/arc/Kbuild for content of core part of the kernel
core-y		+= arch/arc/

# w/o this dtb won't embed into kernel binary
core-y		+= arch/arc/boot/dts/

core-$(CONFIG_ARC_PLAT_FPGA_LEGACY)	+= arch/arc/plat-arcfpga/
core-$(CONFIG_ARC_PLAT_TB10X)		+= arch/arc/plat-tb10x/

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

libs-y		+= arch/arc/lib/ $(LIBGCC)

boot		:= arch/arc/boot

#default target for make without any arguements.
KBUILD_IMAGE	:= bootpImage

all:	$(KBUILD_IMAGE)
bootpImage: vmlinux

boot_targets += uImage uImage.bin uImage.gz

$(boot_targets): vmlinux
	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

%.dtb %.dtb.S %.dtb.o: scripts
	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@

dtbs: scripts
	$(Q)$(MAKE) $(build)=$(boot)/dts dtbs

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

# Hacks to enable final link due to absence of link-time branch relexation
# and gcc choosing optimal(shorter) branches at -O3
#
# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
# However lib/decompress_inflate.o (.init.text) calls
# zlib_inflate_workspacesize (.text) causing relocation errors.
# Thus forcing all exten calls in this file to be long calls
export CFLAGS_decompress_inflate.o = -mmedium-calls
export CFLAGS_initramfs.o = -mmedium-calls
ifdef CONFIG_SMP
export CFLAGS_core.o = -mmedium-calls
endif
Commit	Line	Data
cfdbc2e1 VG	1	#
	2	# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
	3	#
	4	# This program is free software; you can redistribute it and/or modify
	5	# it under the terms of the GNU General Public License version 2 as
	6	# published by the Free Software Foundation.
	7	#
	8
	9	UTS_MACHINE := arc
	10
af4c3ae3	11	ifeq ($(CROSS_COMPILE),)
5a45da02	12	CROSS_COMPILE := arc-linux-uclibc-
af4c3ae3 VG	13	endif
af4c3ae3 VG	14
cfdbc2e1 VG	15	KBUILD_DEFCONFIG := fpga_defconfig
cfdbc2e1 VG	16
cfdbc2e1 VG	17	cflags-y += -mA7 -fno-common -pipe -fno-builtin -D__linux__
cfdbc2e1 VG	18
080c3747 VG	19	ifdef CONFIG_ARC_CURR_IN_REG
	20	# For a global register defintion, make sure it gets passed to every file
	21	# We had a customer reported bug where some code built in kernel was NOT using
	22	# any kernel headers, and missing the r25 global register
8235703e	23	# Can't do unconditionally because of recursive include issues
080c3747 VG	24	# due to <linux/thread_info.h>
	25	LINUXINCLUDE += -include ${src}/arch/arc/include/asm/current.h
	26	endif
	27
5a45da02 VG	28	upto_gcc42 := $(call cc-ifversion, -le, 0402, y)
	29	upto_gcc44 := $(call cc-ifversion, -le, 0404, y)
	30	atleast_gcc44 := $(call cc-ifversion, -ge, 0404, y)
	31	atleast_gcc48 := $(call cc-ifversion, -ge, 0408, y)
	32
cfdbc2e1 VG	33	cflags-$(atleast_gcc44) += -fsection-anchors
	34
	35	cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock
	36	cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape
	37	cflags-$(CONFIG_ARC_HAS_RTSC) += -mrtsc
	38	cflags-$(CONFIG_ARC_DW2_UNWIND) += -fasynchronous-unwind-tables
	39
5a45da02 VG	40	# By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
	41	ifeq ($(atleast_gcc48),y)
	42	cflags-$(CONFIG_ARC_DW2_UNWIND) += -gdwarf-2
	43	endif
	44
cfdbc2e1 VG	45	ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
	46	# Generic build system uses -O2, we want -O3
	47	cflags-y += -O3
	48	endif
	49
	50	# small data is default for elf32 tool-chain. If not usable, disable it
	51	# This also allows repurposing GP as scratch reg to gcc reg allocator
	52	disable_small_data := y
	53	cflags-$(disable_small_data) += -mno-sdata -fcall-used-gp
	54
	55	cflags-$(CONFIG_CPU_BIG_ENDIAN) += -mbig-endian
	56	ldflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
	57
5a45da02	58	# STAR 9000518362: (fixed with binutils shipping with gcc 4.8)
cfdbc2e1	59	# arc-linux-uclibc-ld (buildroot) or arceb-elf32-ld (EZChip) don't accept
5a45da02 VG	60	# --build-id w/o "-marclinux". Default arc-elf32-ld is OK
5a45da02 VG	61	ldflags-$(upto_gcc44) += -marclinux
cfdbc2e1 VG	62
	63	ARC_LIBGCC := -mA7
	64	cflags-$(CONFIG_ARC_HAS_HW_MPY) += -multcost=16
	65
	66	ifndef CONFIG_ARC_HAS_HW_MPY
	67	cflags-y += -mno-mpy
	68
	69	# newlib for ARC700 assumes MPY to be always present, which is generally true
	70	# However, if someone really doesn't want MPY, we need to use the 600 ver
	71	# which coupled with -mno-mpy will use mpy emulation
	72	# With gcc 4.4.7, -mno-mpy is enough to make any other related adjustments,
	73	# e.g. increased cost of MPY. With gcc 4.2.1 this had to be explicitly hinted
	74
5a45da02 VG	75	ifeq ($(upto_gcc42),y)
5a45da02 VG	76	ARC_LIBGCC := -marc600
cfdbc2e1 VG	77	cflags-y += -multcost=30
	78	endif
	79	endif
	80
	81	LIBGCC := $(shell $(CC) $(ARC_LIBGCC) $(cflags-y) --print-libgcc-file-name)
	82
	83	# Modules with short calls might break for calls into builtin-kernel
	84	KBUILD_CFLAGS_MODULE += -mlong-calls
	85
	86	# Finally dump eveything into kernel build system
	87	KBUILD_CFLAGS += $(cflags-y)
	88	KBUILD_AFLAGS += $(KBUILD_CFLAGS)
	89	LDFLAGS += $(ldflags-y)
	90
cfdbc2e1 VG	91	head-y := arch/arc/kernel/head.o
	92
	93	# See arch/arc/Kbuild for content of core part of the kernel
	94	core-y += arch/arc/
	95
999159a5 VG	96	# w/o this dtb won't embed into kernel binary
	97	core-y += arch/arc/boot/dts/
	98
e97ff121	99	core-$(CONFIG_ARC_PLAT_FPGA_LEGACY) += arch/arc/plat-arcfpga/
072eb693	100	core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/
cfdbc2e1	101
769bc1fd VG	102	drivers-$(CONFIG_OPROFILE) += arch/arc/oprofile/
769bc1fd VG	103
cfdbc2e1 VG	104	libs-y += arch/arc/lib/ $(LIBGCC)
cfdbc2e1 VG	105
fb0990bb VG	106	boot := arch/arc/boot
fb0990bb VG	107
cfdbc2e1	108	#default target for make without any arguements.
fb0990bb	109	KBUILD_IMAGE := bootpImage
cfdbc2e1 VG	110
cfdbc2e1 VG	111	all: $(KBUILD_IMAGE)
cfdbc2e1 VG	112	bootpImage: vmlinux
cfdbc2e1 VG	113
104058ed VG	114	boot_targets += uImage uImage.bin uImage.gz
	115
	116	$(boot_targets): vmlinux
cfdbc2e1 VG	117	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
cfdbc2e1 VG	118
999159a5 VG	119	%.dtb %.dtb.S %.dtb.o: scripts
	120	$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
	121
	122	dtbs: scripts
	123	$(Q)$(MAKE) $(build)=$(boot)/dts dtbs
	124
cfdbc2e1 VG	125	archclean:
	126	$(Q)$(MAKE) $(clean)=$(boot)
	127
	128	# Hacks to enable final link due to absence of link-time branch relexation
	129	# and gcc choosing optimal(shorter) branches at -O3
	130	#
	131	# vineetg Feb 2010: -mlong-calls switched off for overall kernel build
	132	# However lib/decompress_inflate.o (.init.text) calls
	133	# zlib_inflate_workspacesize (.text) causing relocation errors.
	134	# Thus forcing all exten calls in this file to be long calls
	135	export CFLAGS_decompress_inflate.o = -mmedium-calls
	136	export CFLAGS_initramfs.o = -mmedium-calls
41195d23 VG	137	ifdef CONFIG_SMP
	138	export CFLAGS_core.o = -mmedium-calls
	139	endif