[deliverable/linux.git] / arch / mips / Makefile

#
# 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, 95, 96, 2003 by Ralf Baechle
# DECStation modifications by Paul M. Antoine, 1996
# Copyright (C) 2002, 2003, 2004  Maciej W. Rozycki
#
# 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" cleaning up for this architecture.
#

KBUILD_DEFCONFIG := ip22_defconfig

#
# Select the object file format to substitute into the linker script.
#
ifdef CONFIG_CPU_LITTLE_ENDIAN
32bit-tool-archpref	= mipsel
64bit-tool-archpref	= mips64el
32bit-bfd		= elf32-tradlittlemips
64bit-bfd		= elf64-tradlittlemips
32bit-emul		= elf32ltsmip
64bit-emul		= elf64ltsmip
else
32bit-tool-archpref	= mips
64bit-tool-archpref	= mips64
32bit-bfd		= elf32-tradbigmips
64bit-bfd		= elf64-tradbigmips
32bit-emul		= elf32btsmip
64bit-emul		= elf64btsmip
endif

ifdef CONFIG_32BIT
tool-archpref		= $(32bit-tool-archpref)
UTS_MACHINE		:= mips
endif
ifdef CONFIG_64BIT
tool-archpref		= $(64bit-tool-archpref)
UTS_MACHINE		:= mips64
endif

ifneq ($(SUBARCH),$(ARCH))
  ifeq ($(CROSS_COMPILE),)
    CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
  endif
endif

ifdef CONFIG_FUNCTION_GRAPH_TRACER
  ifndef KBUILD_MCOUNT_RA_ADDRESS
    ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
      cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
    endif
  endif
endif
cflags-y += $(call cc-option, -mno-check-zero-division)

ifdef CONFIG_32BIT
ld-emul			= $(32bit-emul)
vmlinux-32		= vmlinux
vmlinux-64		= vmlinux.64

cflags-y		+= -mabi=32
endif

ifdef CONFIG_64BIT
ld-emul			= $(64bit-emul)
vmlinux-32		= vmlinux.32
vmlinux-64		= vmlinux

cflags-y		+= -mabi=64
endif

all-$(CONFIG_BOOT_ELF32)	:= $(vmlinux-32)
all-$(CONFIG_BOOT_ELF64)	:= $(vmlinux-64)
all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz

#
# GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
# code since it only slows down the whole thing.  At some point we might make
# use of global pointer optimizations but their use of $28 conflicts with
# the current pointer optimization.
#
# The DECStation requires an ECOFF kernel for remote booting, other MIPS
# machines may also.  Since BFD is incredibly buggy with respect to
# crossformat linking we rely on the elf2ecoff tool for format conversion.
#
cflags-y			+= -G 0 -mno-abicalls -fno-pic -pipe
cflags-y			+= -msoft-float
LDFLAGS_vmlinux			+= -G 0 -static -n -nostdlib
KBUILD_AFLAGS_MODULE		+= -mlong-calls
KBUILD_CFLAGS_MODULE		+= -mlong-calls

#
# pass -msoft-float to GAS if it supports it.  However on newer binutils
# (specifically newer than 2.24.51.20140728) we then also need to explicitly
# set ".set hardfloat" in all files which manipulate floating point registers.
#
ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
	cflags-y		+= -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
endif

cflags-y += -ffreestanding

#
# We explicitly add the endianness specifier if needed, this allows
# to compile kernels with a toolchain for the other endianness. We
# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
# when fed the toolchain default!
#
# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
# are used, so we kludge that here.  A bug has been filed at
# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
#
undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
cflags-$(CONFIG_CPU_BIG_ENDIAN)		+= $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
cflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))

cflags-$(CONFIG_SB1XXX_CORELIS)	+= $(call cc-option,-mno-sched-prolog) \
				   -fno-omit-frame-pointer
#
# CPU-dependent compiler/assembler options for optimization.
#
cflags-$(CONFIG_CPU_R3000)	+= -march=r3000
cflags-$(CONFIG_CPU_TX39XX)	+= -march=r3900
cflags-$(CONFIG_CPU_R6000)	+= -march=r6000 -Wa,--trap
cflags-$(CONFIG_CPU_R4300)	+= -march=r4300 -Wa,--trap
cflags-$(CONFIG_CPU_VR41XX)	+= -march=r4100 -Wa,--trap
cflags-$(CONFIG_CPU_R4X00)	+= -march=r4600 -Wa,--trap
cflags-$(CONFIG_CPU_TX49XX)	+= -march=r4600 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS32_R1)	+= $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
			-Wa,-mips32 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS32_R2)	+= $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
			-Wa,-mips32r2 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS32_R6)	+= -march=mips32r6 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R1)	+= $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
			-Wa,-mips64 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R2)	+= $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
			-Wa,-mips64r2 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R6)	+= -march=mips64r6 -Wa,--trap
cflags-$(CONFIG_CPU_R5000)	+= -march=r5000 -Wa,--trap
cflags-$(CONFIG_CPU_R5432)	+= $(call cc-option,-march=r5400,-march=r5000) \
			-Wa,--trap
cflags-$(CONFIG_CPU_R5500)	+= $(call cc-option,-march=r5500,-march=r5000) \
			-Wa,--trap
cflags-$(CONFIG_CPU_NEVADA)	+= $(call cc-option,-march=rm5200,-march=r5000) \
			-Wa,--trap
cflags-$(CONFIG_CPU_RM7000)	+= $(call cc-option,-march=rm7000,-march=r5000) \
			-Wa,--trap
cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-march=sb1,-march=r5000) \
			-Wa,--trap
cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-mno-mdmx)
cflags-$(CONFIG_CPU_SB1)	+= $(call cc-option,-mno-mips3d)
cflags-$(CONFIG_CPU_R8000)	+= -march=r8000 -Wa,--trap
cflags-$(CONFIG_CPU_R10000)	+= $(call cc-option,-march=r10000,-march=r8000) \
			-Wa,--trap
cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
endif
cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
cflags-$(CONFIG_CPU_BMIPS)	+= -march=mips32 -Wa,-mips32 -Wa,--trap
#
# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
# as MIPS64 R1; older versions as just R1.  This leaves the possibility open
# that GCC might generate R2 code for -march=loongson3a which then is rejected
# by GAS.  The cc-option can't probe for this behaviour so -march=loongson3a
# can't easily be used safely within the kbuild framework.
#
cflags-$(CONFIG_CPU_LOONGSON3)  +=					\
	$(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
	-Wa,-mips64r2 -Wa,--trap

cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)	+= $(call cc-option,-mfix-r4000,)
cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)	+= $(call cc-option,-mfix-r4400,)
cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)	+= $(call cc-option,-mno-daddi,)

# For smartmips configurations, there are hundreds of warnings due to ISA overrides
# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
# similar directives in the kernel will spam the build logs with the following warnings:
# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
# or
# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
# been fixed properly.
mips-cflags				:= $(cflags-y)
ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
smartmips-ase				:= $(call cc-option-yn,$(mips-cflags) -msmartmips)
cflags-$(smartmips-ase)			+= -msmartmips -Wa,--no-warn
endif
ifeq ($(CONFIG_CPU_MICROMIPS),y)
micromips-ase				:= $(call cc-option-yn,$(mips-cflags) -mmicromips)
cflags-$(micromips-ase)			+= -mmicromips
endif
ifeq ($(CONFIG_CPU_HAS_MSA),y)
toolchain-msa				:= $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
cflags-$(toolchain-msa)			+= -DTOOLCHAIN_SUPPORTS_MSA
endif

#
# Firmware support
#
libs-$(CONFIG_FW_ARC)		+= arch/mips/fw/arc/
libs-$(CONFIG_FW_CFE)		+= arch/mips/fw/cfe/
libs-$(CONFIG_FW_SNIPROM)	+= arch/mips/fw/sni/
libs-y				+= arch/mips/fw/lib/

#
# Kernel compression
#
ifdef SYS_SUPPORTS_ZBOOT
COMPRESSION_FNAME		= vmlinuz
else
COMPRESSION_FNAME		= vmlinux
endif

#
# Board-dependent options and extra files
#
include arch/mips/Kbuild.platforms

ifdef CONFIG_PHYSICAL_START
load-y					= $(CONFIG_PHYSICAL_START)
endif
entry-y				= 0x$(shell $(NM) vmlinux 2>/dev/null \
					| grep "\bkernel_entry\b" | cut -f1 -d \ )

cflags-y			+= -I$(srctree)/arch/mips/include/asm/mach-generic
drivers-$(CONFIG_PCI)		+= arch/mips/pci/

#
# Automatically detect the build format. By default we choose
# the elf format according to the load address.
# We can always force a build with a 64-bits symbol format by
# passing 'KBUILD_SYM32=no' option to the make's command line.
#
ifdef CONFIG_64BIT
  ifndef KBUILD_SYM32
    ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
      KBUILD_SYM32 = y
    endif
  endif

  ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
    cflags-y += -msym32 -DKBUILD_64BIT_SYM32
  else
    ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
      $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
    endif
  endif
endif

KBUILD_AFLAGS	+= $(cflags-y)
KBUILD_CFLAGS	+= $(cflags-y)
KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)

bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y) \
		  VMLINUX_ENTRY_ADDRESS=$(entry-y)

LDFLAGS			+= -m $(ld-emul)

ifdef CONFIG_MIPS
CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
	egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
ifdef CONFIG_64BIT
CHECKFLAGS		+= -m64
endif
endif

OBJCOPYFLAGS		+= --remove-section=.reginfo

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

libs-y			+= arch/mips/lib/
libs-y			+= arch/mips/math-emu/

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

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

# suspend and hibernation support
drivers-$(CONFIG_PM)	+= arch/mips/power/

# boot image targets (arch/mips/boot/)
boot-y			:= vmlinux.bin
boot-y			+= vmlinux.ecoff
boot-y			+= vmlinux.srec
ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
boot-y			+= uImage
boot-y			+= uImage.bin
boot-y			+= uImage.bz2
boot-y			+= uImage.gz
boot-y			+= uImage.lzma
boot-y			+= uImage.lzo
endif

# compressed boot image targets (arch/mips/boot/compressed/)
bootz-y			:= vmlinuz
bootz-y			+= vmlinuz.bin
bootz-y			+= vmlinuz.ecoff
bootz-y			+= vmlinuz.srec

ifdef CONFIG_LASAT
rom.bin rom.sw: vmlinux
	$(Q)$(MAKE) $(build)=arch/mips/lasat/image \
		$(bootvars-y) $@
endif

#
# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
# convert to ECOFF using elf2ecoff.
#
quiet_cmd_32 = OBJCOPY $@
	cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
vmlinux.32: vmlinux
	$(call cmd,32)

#
# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
# ELF files from 32-bit files by conversion.
#
quiet_cmd_64 = OBJCOPY $@
	cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
vmlinux.64: vmlinux
	$(call cmd,64)

all:	$(all-y)

# boot
$(boot-y): $(vmlinux-32) FORCE
	$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
		$(bootvars-y) arch/mips/boot/$@

ifdef CONFIG_SYS_SUPPORTS_ZBOOT
# boot/compressed
$(bootz-y): $(vmlinux-32) FORCE
	$(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
		$(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
else
vmlinuz: FORCE
	@echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
	/bin/false
endif


CLEAN_FILES += vmlinux.32 vmlinux.64

# device-trees
core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/

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

PHONY += dtbs
dtbs: scripts
	$(Q)$(MAKE) $(build)=arch/mips/boot/dts

PHONY += dtbs_install
dtbs_install:
	$(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts

archprepare:
ifdef CONFIG_MIPS32_N32
	@echo '  Checking missing-syscalls for N32'
	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
endif
ifdef CONFIG_MIPS32_O32
	@echo '  Checking missing-syscalls for O32'
	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
endif

install:
	$(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
ifdef CONFIG_SYS_SUPPORTS_ZBOOT
	$(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
endif
	$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
	$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)

archclean:
	$(Q)$(MAKE) $(clean)=arch/mips/boot
	$(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
	$(Q)$(MAKE) $(clean)=arch/mips/lasat

define archhelp
	echo '  install              - install kernel into $(INSTALL_PATH)'
	echo '  vmlinux.ecoff        - ECOFF boot image'
	echo '  vmlinux.bin          - Raw binary boot image'
	echo '  vmlinux.srec         - SREC boot image'
	echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
	echo '  vmlinuz              - Compressed boot(zboot) image'
	echo '  vmlinuz.ecoff        - ECOFF zboot image'
	echo '  vmlinuz.bin          - Raw binary zboot image'
	echo '  vmlinuz.srec         - SREC zboot image'
	echo '  uImage               - U-Boot image'
	echo '  uImage.bin           - U-Boot image (uncompressed)'
	echo '  uImage.bz2           - U-Boot image (bz2)'
	echo '  uImage.gz            - U-Boot image (gzip)'
	echo '  uImage.lzma          - U-Boot image (lzma)'
	echo '  uImage.lzo           - U-Boot image (lzo)'
	echo '  dtbs                 - Device-tree blobs for enabled boards'
	echo '  dtbs_install         - Install dtbs to $(INSTALL_DTBS_PATH)'
	echo
	echo '  These will be default as appropriate for a configured platform.'
endef
Commit	Line	Data
	1	#
	2	# This file is subject to the terms and conditions of the GNU General Public
	3	# License. See the file "COPYING" in the main directory of this archive
	4	# for more details.
	5	#
	6	# Copyright (C) 1994, 95, 96, 2003 by Ralf Baechle
	7	# DECStation modifications by Paul M. Antoine, 1996
	8	# Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki
	9	#
	10	# This file is included by the global makefile so that you can add your own
	11	# architecture-specific flags and dependencies. Remember to do have actions
	12	# for "archclean" cleaning up for this architecture.
	13	#
	14
	15	KBUILD_DEFCONFIG := ip22_defconfig
	16
	17	#
	18	# Select the object file format to substitute into the linker script.
	19	#
	20	ifdef CONFIG_CPU_LITTLE_ENDIAN
	21	32bit-tool-archpref = mipsel
	22	64bit-tool-archpref = mips64el
	23	32bit-bfd = elf32-tradlittlemips
	24	64bit-bfd = elf64-tradlittlemips
	25	32bit-emul = elf32ltsmip
	26	64bit-emul = elf64ltsmip
	27	else
	28	32bit-tool-archpref = mips
	29	64bit-tool-archpref = mips64
	30	32bit-bfd = elf32-tradbigmips
	31	64bit-bfd = elf64-tradbigmips
	32	32bit-emul = elf32btsmip
	33	64bit-emul = elf64btsmip
	34	endif
	35
	36	ifdef CONFIG_32BIT
	37	tool-archpref = $(32bit-tool-archpref)
	38	UTS_MACHINE := mips
	39	endif
	40	ifdef CONFIG_64BIT
	41	tool-archpref = $(64bit-tool-archpref)
	42	UTS_MACHINE := mips64
	43	endif
	44
	45	ifneq ($(SUBARCH),$(ARCH))
	46	ifeq ($(CROSS_COMPILE),)
	47	CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
	48	endif
	49	endif
	50
	51	ifdef CONFIG_FUNCTION_GRAPH_TRACER
	52	ifndef KBUILD_MCOUNT_RA_ADDRESS
	53	ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
	54	cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
	55	endif
	56	endif
	57	endif
	58	cflags-y += $(call cc-option, -mno-check-zero-division)
	59
	60	ifdef CONFIG_32BIT
	61	ld-emul = $(32bit-emul)
	62	vmlinux-32 = vmlinux
	63	vmlinux-64 = vmlinux.64
	64
	65	cflags-y += -mabi=32
	66	endif
	67
	68	ifdef CONFIG_64BIT
	69	ld-emul = $(64bit-emul)
	70	vmlinux-32 = vmlinux.32
	71	vmlinux-64 = vmlinux
	72
	73	cflags-y += -mabi=64
	74	endif
	75
	76	all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
	77	all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
	78	all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
	79
	80	#
	81	# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
	82	# code since it only slows down the whole thing. At some point we might make
	83	# use of global pointer optimizations but their use of $28 conflicts with
	84	# the current pointer optimization.
	85	#
	86	# The DECStation requires an ECOFF kernel for remote booting, other MIPS
	87	# machines may also. Since BFD is incredibly buggy with respect to
	88	# crossformat linking we rely on the elf2ecoff tool for format conversion.
	89	#
	90	cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
	91	cflags-y += -msoft-float
	92	LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
	93	KBUILD_AFLAGS_MODULE += -mlong-calls
	94	KBUILD_CFLAGS_MODULE += -mlong-calls
	95
	96	#
	97	# pass -msoft-float to GAS if it supports it. However on newer binutils
	98	# (specifically newer than 2.24.51.20140728) we then also need to explicitly
	99	# set ".set hardfloat" in all files which manipulate floating point registers.
	100	#
	101	ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
	102	cflags-y += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
	103	endif
	104
	105	cflags-y += -ffreestanding
	106
	107	#
	108	# We explicitly add the endianness specifier if needed, this allows
	109	# to compile kernels with a toolchain for the other endianness. We
	110	# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
	111	# when fed the toolchain default!
	112	#
	113	# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
	114	# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
	115	# are used, so we kludge that here. A bug has been filed at
	116	# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
	117	#
	118	undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
	119	undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
	120	predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
	121	predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
	122	cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine \|grep -q 'mips.el-.' && echo -EB $(undef-all) $(predef-be))
	123	cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine \|grep -q 'mips.el-.' \|\| echo -EL $(undef-all) $(predef-le))
	124
	125	cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
	126	-fno-omit-frame-pointer
	127	#
	128	# CPU-dependent compiler/assembler options for optimization.
	129	#
	130	cflags-$(CONFIG_CPU_R3000) += -march=r3000
	131	cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
	132	cflags-$(CONFIG_CPU_R6000) += -march=r6000 -Wa,--trap
	133	cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
	134	cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
	135	cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
	136	cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
	137	cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
	138	-Wa,-mips32 -Wa,--trap
	139	cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
	140	-Wa,-mips32r2 -Wa,--trap
	141	cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap
	142	cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
	143	-Wa,-mips64 -Wa,--trap
	144	cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
	145	-Wa,-mips64r2 -Wa,--trap
	146	cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
	147	cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
	148	cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
	149	-Wa,--trap
	150	cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
	151	-Wa,--trap
	152	cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
	153	-Wa,--trap
	154	cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
	155	-Wa,--trap
	156	cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
	157	-Wa,--trap
	158	cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
	159	cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
	160	cflags-$(CONFIG_CPU_R8000) += -march=r8000 -Wa,--trap
	161	cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
	162	-Wa,--trap
	163	cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
	164	ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
	165	cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
	166	endif
	167	cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
	168	cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
	169	#
	170	# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
	171	# as MIPS64 R1; older versions as just R1. This leaves the possibility open
	172	# that GCC might generate R2 code for -march=loongson3a which then is rejected
	173	# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a
	174	# can't easily be used safely within the kbuild framework.
	175	#
	176	cflags-$(CONFIG_CPU_LOONGSON3) += \
	177	$(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
	178	-Wa,-mips64r2 -Wa,--trap
	179
	180	cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
	181	cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
	182	cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
	183
	184	# For smartmips configurations, there are hundreds of warnings due to ISA overrides
	185	# in assembly and header files. smartmips is only supported for MIPS32r1 onwards
	186	# and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
	187	# similar directives in the kernel will spam the build logs with the following warnings:
	188	# Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
	189	# or
	190	# Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
	191	# Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
	192	# been fixed properly.
	193	mips-cflags := $(cflags-y)
	194	ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
	195	smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
	196	cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
	197	endif
	198	ifeq ($(CONFIG_CPU_MICROMIPS),y)
	199	micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
	200	cflags-$(micromips-ase) += -mmicromips
	201	endif
	202	ifeq ($(CONFIG_CPU_HAS_MSA),y)
	203	toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
	204	cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
	205	endif
	206
	207	#
	208	# Firmware support
	209	#
	210	libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/
	211	libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
	212	libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
	213	libs-y += arch/mips/fw/lib/
	214
	215	#
	216	# Kernel compression
	217	#
	218	ifdef SYS_SUPPORTS_ZBOOT
	219	COMPRESSION_FNAME = vmlinuz
	220	else
	221	COMPRESSION_FNAME = vmlinux
	222	endif
	223
	224	#
	225	# Board-dependent options and extra files
	226	#
	227	include arch/mips/Kbuild.platforms
	228
	229	ifdef CONFIG_PHYSICAL_START
	230	load-y = $(CONFIG_PHYSICAL_START)
	231	endif
	232	entry-y = 0x$(shell $(NM) vmlinux 2>/dev/null \
	233	\| grep "\bkernel_entry\b" \| cut -f1 -d \ )
	234
	235	cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
	236	drivers-$(CONFIG_PCI) += arch/mips/pci/
	237
	238	#
	239	# Automatically detect the build format. By default we choose
	240	# the elf format according to the load address.
	241	# We can always force a build with a 64-bits symbol format by
	242	# passing 'KBUILD_SYM32=no' option to the make's command line.
	243	#
	244	ifdef CONFIG_64BIT
	245	ifndef KBUILD_SYM32
	246	ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
	247	KBUILD_SYM32 = y
	248	endif
	249	endif
	250
	251	ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
	252	cflags-y += -msym32 -DKBUILD_64BIT_SYM32
	253	else
	254	ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
	255	$(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
	256	endif
	257	endif
	258	endif
	259
	260	KBUILD_AFLAGS += $(cflags-y)
	261	KBUILD_CFLAGS += $(cflags-y)
	262	KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
	263	KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
	264
	265	bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
	266	VMLINUX_ENTRY_ADDRESS=$(entry-y)
	267
	268	LDFLAGS += -m $(ld-emul)
	269
	270	ifdef CONFIG_MIPS
	271	CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null \| \
	272	egrep -vw '__GNUC_(\|MINOR_\|PATCHLEVEL_)_' \| \
	273	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
	274	ifdef CONFIG_64BIT
	275	CHECKFLAGS += -m64
	276	endif
	277	endif
	278
	279	OBJCOPYFLAGS += --remove-section=.reginfo
	280
	281	head-y := arch/mips/kernel/head.o
	282
	283	libs-y += arch/mips/lib/
	284	libs-y += arch/mips/math-emu/
	285
	286	# See arch/mips/Kbuild for content of core part of the kernel
	287	core-y += arch/mips/
	288
	289	drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
	290
	291	# suspend and hibernation support
	292	drivers-$(CONFIG_PM) += arch/mips/power/
	293
	294	# boot image targets (arch/mips/boot/)
	295	boot-y := vmlinux.bin
	296	boot-y += vmlinux.ecoff
	297	boot-y += vmlinux.srec
	298	ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
	299	boot-y += uImage
	300	boot-y += uImage.bin
	301	boot-y += uImage.bz2
	302	boot-y += uImage.gz
	303	boot-y += uImage.lzma
	304	boot-y += uImage.lzo
	305	endif
	306
	307	# compressed boot image targets (arch/mips/boot/compressed/)
	308	bootz-y := vmlinuz
	309	bootz-y += vmlinuz.bin
	310	bootz-y += vmlinuz.ecoff
	311	bootz-y += vmlinuz.srec
	312
	313	ifdef CONFIG_LASAT
	314	rom.bin rom.sw: vmlinux
	315	$(Q)$(MAKE) $(build)=arch/mips/lasat/image \
	316	$(bootvars-y) $@
	317	endif
	318
	319	#
	320	# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
	321	# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
	322	# convert to ECOFF using elf2ecoff.
	323	#
	324	quiet_cmd_32 = OBJCOPY $@
	325	cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
	326	vmlinux.32: vmlinux
	327	$(call cmd,32)
	328
	329	#
	330	# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
	331	# ELF files from 32-bit files by conversion.
	332	#
	333	quiet_cmd_64 = OBJCOPY $@
	334	cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
	335	vmlinux.64: vmlinux
	336	$(call cmd,64)
	337
	338	all: $(all-y)
	339
	340	# boot
	341	$(boot-y): $(vmlinux-32) FORCE
	342	$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
	343	$(bootvars-y) arch/mips/boot/$@
	344
	345	ifdef CONFIG_SYS_SUPPORTS_ZBOOT
	346	# boot/compressed
	347	$(bootz-y): $(vmlinux-32) FORCE
	348	$(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
	349	$(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
	350	else
	351	vmlinuz: FORCE
	352	@echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
	353	/bin/false
	354	endif
	355
	356
	357	CLEAN_FILES += vmlinux.32 vmlinux.64
	358
	359	# device-trees
	360	core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
	361
	362	%.dtb %.dtb.S %.dtb.o: \| scripts
	363	$(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
	364
	365	PHONY += dtbs
	366	dtbs: scripts
	367	$(Q)$(MAKE) $(build)=arch/mips/boot/dts
	368
	369	PHONY += dtbs_install
	370	dtbs_install:
	371	$(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
	372
	373	archprepare:
	374	ifdef CONFIG_MIPS32_N32
	375	@echo ' Checking missing-syscalls for N32'
	376	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
	377	endif
	378	ifdef CONFIG_MIPS32_O32
	379	@echo ' Checking missing-syscalls for O32'
	380	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
	381	endif
	382
	383	install:
	384	$(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
	385	ifdef CONFIG_SYS_SUPPORTS_ZBOOT
	386	$(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
	387	endif
	388	$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
	389	$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
	390
	391	archclean:
	392	$(Q)$(MAKE) $(clean)=arch/mips/boot
	393	$(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
	394	$(Q)$(MAKE) $(clean)=arch/mips/lasat
	395
	396	define archhelp
	397	echo ' install - install kernel into $(INSTALL_PATH)'
	398	echo ' vmlinux.ecoff - ECOFF boot image'
	399	echo ' vmlinux.bin - Raw binary boot image'
	400	echo ' vmlinux.srec - SREC boot image'
	401	echo ' vmlinux.32 - 64-bit boot image wrapped in 32bits (IP22/IP32)'
	402	echo ' vmlinuz - Compressed boot(zboot) image'
	403	echo ' vmlinuz.ecoff - ECOFF zboot image'
	404	echo ' vmlinuz.bin - Raw binary zboot image'
	405	echo ' vmlinuz.srec - SREC zboot image'
	406	echo ' uImage - U-Boot image'
	407	echo ' uImage.bin - U-Boot image (uncompressed)'
	408	echo ' uImage.bz2 - U-Boot image (bz2)'
	409	echo ' uImage.gz - U-Boot image (gzip)'
	410	echo ' uImage.lzma - U-Boot image (lzma)'
	411	echo ' uImage.lzo - U-Boot image (lzo)'
	412	echo ' dtbs - Device-tree blobs for enabled boards'
	413	echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
	414	echo
	415	echo ' These will be default as appropriate for a configured platform.'
	416	endef