#
  # 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
  
  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_CPU_HAS_SMARTMIPS)	+= $(call cc-option,-msmartmips)
  cflags-$(CONFIG_CPU_MICROMIPS) += $(call cc-option,-mmicromips)
  
  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_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_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_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,)
  
  ifdef CONFIG_CPU_SB1
  ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
  KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
  KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
  endif
  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 $(srctree)/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/$$/'/")
  ifdef CONFIG_64BIT
  CHECKFLAGS		+= -m64
  endif
  endif
  
  OBJCOPYFLAGS		+= --remove-section=.reginfo
  
  head-y := arch/mips/kernel/head.o
  
  libs-y			+= arch/mips/lib/
  
  # 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.gz
  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
  
  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 '  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.gz            - U-Boot image (gzip)'
  	echo
  	echo '  These will be default as appropriate for a configured platform.'
  endef