[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.
#

archscripts: scripts_basic
	$(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs

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

ifeq ($(CONFIG_RELOCATABLE),y)
LDFLAGS_vmlinux			+= --emit-relocs
endif

#
# 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

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
toolchain-virt				:= $(call cc-option-yn,$(mips-cflags) -mvirt)
cflags-$(toolchain-virt)		+= -DTOOLCHAIN_SUPPORTS_VIRT

cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_NEVER)	+= -mcompact-branches=never
cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_OPTIMAL)	+= -mcompact-branches=optimal
cflags-$(CONFIG_MIPS_COMPACT_BRANCHES_ALWAYS)	+= -mcompact-branches=always

#
# 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

CMD_RELOCS = arch/mips/boot/tools/relocs
quiet_cmd_relocs = RELOCS  $<
      cmd_relocs = $(CMD_RELOCS) $<

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