arch/mips/Makefile

   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) $(build)=arch/mips/tools elf-entry
  17 ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y)
  18         $(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check
  19 endif
  20         $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
  21
  22 KBUILD_DEFCONFIG := 32r2el_defconfig
  23 KBUILD_DTBS      := dtbs
  24
  25 #
  26 # Select the object file format to substitute into the linker script.
  27 #
  28 ifdef CONFIG_CPU_LITTLE_ENDIAN
  29 32bit-tool-archpref     = mipsel
  30 64bit-tool-archpref     = mips64el
  31 32bit-bfd               = elf32-tradlittlemips
  32 64bit-bfd               = elf64-tradlittlemips
  33 32bit-emul              = elf32ltsmip
  34 64bit-emul              = elf64ltsmip
  35 else
  36 32bit-tool-archpref     = mips
  37 64bit-tool-archpref     = mips64
  38 32bit-bfd               = elf32-tradbigmips
  39 64bit-bfd               = elf64-tradbigmips
  40 32bit-emul              = elf32btsmip
  41 64bit-emul              = elf64btsmip
  42 endif
  43
  44 ifdef CONFIG_32BIT
  45 tool-archpref           = $(32bit-tool-archpref)
  46 UTS_MACHINE             := mips
  47 endif
  48 ifdef CONFIG_64BIT
  49 tool-archpref           = $(64bit-tool-archpref)
  50 UTS_MACHINE             := mips64
  51 endif
  52
  53 ifneq ($(SUBARCH),$(ARCH))
  54   ifeq ($(CROSS_COMPILE),)
  55     CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
  56   endif
  57 endif
  58
  59 ifdef CONFIG_FUNCTION_GRAPH_TRACER
  60   ifndef KBUILD_MCOUNT_RA_ADDRESS
  61     ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
  62       cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
  63     endif
  64   endif
  65 endif
  66 cflags-y += $(call cc-option, -mno-check-zero-division)
  67
  68 ifdef CONFIG_32BIT
  69 ld-emul                 = $(32bit-emul)
  70 vmlinux-32              = vmlinux
  71 vmlinux-64              = vmlinux.64
  72
  73 cflags-y                += -mabi=32
  74 endif
  75
  76 ifdef CONFIG_64BIT
  77 ld-emul                 = $(64bit-emul)
  78 vmlinux-32              = vmlinux.32
  79 vmlinux-64              = vmlinux
  80
  81 cflags-y                += -mabi=64
  82 endif
  83
  84 all-$(CONFIG_BOOT_ELF32)        := $(vmlinux-32)
  85 all-$(CONFIG_BOOT_ELF64)        := $(vmlinux-64)
  86 all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
  87
  88 #
  89 # GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
  90 # code since it only slows down the whole thing.  At some point we might make
  91 # use of global pointer optimizations but their use of $28 conflicts with
  92 # the current pointer optimization.
  93 #
  94 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
  95 # machines may also.  Since BFD is incredibly buggy with respect to
  96 # crossformat linking we rely on the elf2ecoff tool for format conversion.
  97 #
  98 cflags-y                        += -G 0 -mno-abicalls -fno-pic -pipe
  99 cflags-y                        += -msoft-float
 100 LDFLAGS_vmlinux                 += -G 0 -static -n -nostdlib
 101 KBUILD_AFLAGS_MODULE            += -mlong-calls
 102 KBUILD_CFLAGS_MODULE            += -mlong-calls
 103
 104 ifeq ($(CONFIG_RELOCATABLE),y)
 105 LDFLAGS_vmlinux                 += --emit-relocs
 106 endif
 107
 108 #
 109 # pass -msoft-float to GAS if it supports it.  However on newer binutils
 110 # (specifically newer than 2.24.51.20140728) we then also need to explicitly
 111 # set ".set hardfloat" in all files which manipulate floating point registers.
 112 #
 113 ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
 114         cflags-y                += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
 115 endif
 116
 117 cflags-y += -ffreestanding
 118
 119 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -EB
 120 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -EL
 121
 122 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
 123                                    -fno-omit-frame-pointer
 124
 125 # Some distribution-specific toolchains might pass the -fstack-check
 126 # option during the build, which adds a simple stack-probe at the beginning
 127 # of every function.  This stack probe is to ensure that there is enough
 128 # stack space, else a SEGV is generated.  This is not desirable for MIPS
 129 # as kernel stacks are small, placed in unmapped virtual memory, and do not
 130 # grow when overflowed.  Especially on SGI IP27 platforms, this check will
 131 # lead to a NULL pointer dereference in _raw_spin_lock_irq.
 132 #
 133 # In disassembly, this stack probe appears at the top of a function as:
 134 #    sd         zero,<offset>(sp)
 135 # Where <offset> is a negative value.
 136 #
 137 cflags-y += -fno-stack-check
 138
 139 #
 140 # CPU-dependent compiler/assembler options for optimization.
 141 #
 142 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
 143 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
 144 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
 145 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
 146 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
 147 cflags-$(CONFIG_CPU_MIPS32_R1)  += -march=mips32 -Wa,--trap
 148 cflags-$(CONFIG_CPU_MIPS32_R2)  += -march=mips32r2 -Wa,--trap
 149 cflags-$(CONFIG_CPU_MIPS32_R5)  += -march=mips32r5 -Wa,--trap -modd-spreg
 150 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap -modd-spreg
 151 cflags-$(CONFIG_CPU_MIPS64_R1)  += -march=mips64 -Wa,--trap
 152 cflags-$(CONFIG_CPU_MIPS64_R2)  += -march=mips64r2 -Wa,--trap
 153 cflags-$(CONFIG_CPU_MIPS64_R5)  += -march=mips64r5 -Wa,--trap
 154 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
 155 cflags-$(CONFIG_CPU_P5600)      += -march=p5600 -Wa,--trap -modd-spreg
 156 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -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_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
 168                         -Wa,--trap
 169 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
 170 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
 171 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 172 endif
 173 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 174 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
 175
 176 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
 177 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 178 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
 179
 180 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
 181 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
 182 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
 183 # similar directives in the kernel will spam the build logs with the following warnings:
 184 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
 185 # or
 186 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
 187 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
 188 # been fixed properly.
 189 mips-cflags                             := $(cflags-y)
 190 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
 191 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
 192 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
 193 endif
 194 ifeq ($(CONFIG_CPU_MICROMIPS),y)
 195 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
 196 cflags-$(micromips-ase)                 += -mmicromips
 197 endif
 198 ifeq ($(CONFIG_CPU_HAS_MSA),y)
 199 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
 200 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
 201 endif
 202 toolchain-virt                          := $(call cc-option-yn,$(mips-cflags) -mvirt)
 203 cflags-$(toolchain-virt)                += -DTOOLCHAIN_SUPPORTS_VIRT
 204 # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
 205 # only warns
 206 xpa-cflags-y                            := $(mips-cflags)
 207 xpa-cflags-$(micromips-ase)             += -mmicromips -Wa$(comma)-fatal-warnings
 208 toolchain-xpa                           := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
 209 cflags-$(toolchain-xpa)                 += -DTOOLCHAIN_SUPPORTS_XPA
 210 toolchain-crc                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
 211 cflags-$(toolchain-crc)                 += -DTOOLCHAIN_SUPPORTS_CRC
 212 toolchain-dsp                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
 213 cflags-$(toolchain-dsp)                 += -DTOOLCHAIN_SUPPORTS_DSP
 214 toolchain-ginv                          := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
 215 cflags-$(toolchain-ginv)                += -DTOOLCHAIN_SUPPORTS_GINV
 216
 217 #
 218 # Firmware support
 219 #
 220 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
 221 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
 222 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
 223 libs-y                          += arch/mips/fw/lib/
 224
 225 #
 226 # Kernel compression
 227 #
 228 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 229 COMPRESSION_FNAME               = vmlinuz
 230 else
 231 COMPRESSION_FNAME               = vmlinux
 232 endif
 233
 234 #
 235 # Board-dependent options and extra files
 236 #
 237 include arch/mips/Kbuild.platforms
 238
 239 ifdef CONFIG_PHYSICAL_START
 240 load-y                                  = $(CONFIG_PHYSICAL_START)
 241 endif
 242
 243 entry-y                         = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
 244 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
 245 drivers-$(CONFIG_PCI)           += arch/mips/pci/
 246
 247 #
 248 # Automatically detect the build format. By default we choose
 249 # the elf format according to the load address.
 250 # We can always force a build with a 64-bits symbol format by
 251 # passing 'KBUILD_SYM32=no' option to the make's command line.
 252 #
 253 ifdef CONFIG_64BIT
 254   ifndef KBUILD_SYM32
 255     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
 256       KBUILD_SYM32 = y
 257     endif
 258   endif
 259
 260   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
 261     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
 262   else
 263     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
 264       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
 265     endif
 266   endif
 267 endif
 268
 269 # When linking a 32-bit executable the LLVM linker cannot cope with a
 270 # 32-bit load address that has been sign-extended to 64 bits.  Simply
 271 # remove the upper 32 bits then, as it is safe to do so with other
 272 # linkers.
 273 ifdef CONFIG_64BIT
 274         load-ld                 = $(load-y)
 275 else
 276         load-ld                 = $(subst 0xffffffff,0x,$(load-y))
 277 endif
 278
 279 KBUILD_AFLAGS   += $(cflags-y)
 280 KBUILD_CFLAGS   += $(cflags-y)
 281 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
 282 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 283
 284 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
 285                   LINKER_LOAD_ADDRESS=$(load-ld) \
 286                   VMLINUX_ENTRY_ADDRESS=$(entry-y) \
 287                   PLATFORM="$(platform-y)" \
 288                   ITS_INPUTS="$(its-y)"
 289 ifdef CONFIG_32BIT
 290 bootvars-y      += ADDR_BITS=32
 291 endif
 292 ifdef CONFIG_64BIT
 293 bootvars-y      += ADDR_BITS=64
 294 endif
 295
 296 # This is required to get dwarf unwinding tables into .debug_frame
 297 # instead of .eh_frame so we don't discard them.
 298 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 299
 300 KBUILD_LDFLAGS          += -m $(ld-emul)
 301
 302 ifdef CONFIG_MIPS
 303 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 304         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
 305         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
 306 endif
 307
 308 OBJCOPYFLAGS            += --remove-section=.reginfo
 309
 310 head-y := arch/mips/kernel/head.o
 311
 312 libs-y                  += arch/mips/lib/
 313 libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
 314
 315 # See arch/mips/Kbuild for content of core part of the kernel
 316 core-y += arch/mips/
 317
 318 drivers-y                       += arch/mips/crypto/
 319 drivers-$(CONFIG_OPROFILE)      += arch/mips/oprofile/
 320
 321 # suspend and hibernation support
 322 drivers-$(CONFIG_PM)    += arch/mips/power/
 323
 324 # boot image targets (arch/mips/boot/)
 325 boot-y                  := vmlinux.bin
 326 boot-y                  += vmlinux.ecoff
 327 boot-y                  += vmlinux.srec
 328 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 329 boot-y                  += uImage
 330 boot-y                  += uImage.bin
 331 boot-y                  += uImage.bz2
 332 boot-y                  += uImage.gz
 333 boot-y                  += uImage.lzma
 334 boot-y                  += uImage.lzo
 335 endif
 336 boot-y                  += vmlinux.itb
 337 boot-y                  += vmlinux.gz.itb
 338 boot-y                  += vmlinux.bz2.itb
 339 boot-y                  += vmlinux.lzma.itb
 340 boot-y                  += vmlinux.lzo.itb
 341
 342 # compressed boot image targets (arch/mips/boot/compressed/)
 343 bootz-y                 := vmlinuz
 344 bootz-y                 += vmlinuz.bin
 345 bootz-y                 += vmlinuz.ecoff
 346 bootz-y                 += vmlinuz.srec
 347 ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
 348 bootz-y                 += uzImage.bin
 349 endif
 350 bootz-y                 += vmlinuz.itb
 351
 352 #
 353 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
 354 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
 355 # convert to ECOFF using elf2ecoff.
 356 #
 357 quiet_cmd_32 = OBJCOPY $@
 358         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
 359 vmlinux.32: vmlinux
 360         $(call cmd,32)
 361
 362 #
 363 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
 364 # ELF files from 32-bit files by conversion.
 365 #
 366 quiet_cmd_64 = OBJCOPY $@
 367         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
 368 vmlinux.64: vmlinux
 369         $(call cmd,64)
 370
 371 all:    $(all-y) $(KBUILD_DTBS)
 372
 373 # boot
 374 $(boot-y): $(vmlinux-32) FORCE
 375         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
 376                 $(bootvars-y) arch/mips/boot/$@
 377
 378 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 379 # boot/compressed
 380 $(bootz-y): $(vmlinux-32) FORCE
 381         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
 382                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
 383 else
 384 vmlinuz: FORCE
 385         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
 386         /bin/false
 387 endif
 388
 389
 390 CLEAN_FILES += vmlinux.32 vmlinux.64
 391
 392 # device-trees
 393 core-y += arch/mips/boot/dts/
 394
 395 archprepare:
 396 ifdef CONFIG_MIPS32_N32
 397         @$(kecho) '  Checking missing-syscalls for N32'
 398         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
 399 endif
 400 ifdef CONFIG_MIPS32_O32
 401         @$(kecho) '  Checking missing-syscalls for O32'
 402         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
 403 endif
 404
 405 install:
 406         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
 407 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 408         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
 409 endif
 410         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
 411         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
 412
 413 archclean:
 414         $(Q)$(MAKE) $(clean)=arch/mips/boot
 415         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
 416         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
 417
 418 archheaders:
 419         $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
 420
 421 define archhelp
 422         echo '  install              - install kernel into $(INSTALL_PATH)'
 423         echo '  vmlinux.ecoff        - ECOFF boot image'
 424         echo '  vmlinux.bin          - Raw binary boot image'
 425         echo '  vmlinux.srec         - SREC boot image'
 426         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
 427         echo '  vmlinuz              - Compressed boot(zboot) image'
 428         echo '  vmlinuz.ecoff        - ECOFF zboot image'
 429         echo '  vmlinuz.bin          - Raw binary zboot image'
 430         echo '  vmlinuz.srec         - SREC zboot image'
 431         echo '  uImage               - U-Boot image'
 432         echo '  uImage.bin           - U-Boot image (uncompressed)'
 433         echo '  uImage.bz2           - U-Boot image (bz2)'
 434         echo '  uImage.gz            - U-Boot image (gzip)'
 435         echo '  uImage.lzma          - U-Boot image (lzma)'
 436         echo '  uImage.lzo           - U-Boot image (lzo)'
 437         echo '  uzImage.bin          - U-Boot image (self-extracting)'
 438         echo
 439         echo '  These will be default as appropriate for a configured platform.'
 440         echo
 441         echo '  If you are targeting a system supported by generic kernels you may'
 442         echo '  configure the kernel for a given architecture target like so:'
 443         echo
 444         echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
 445         echo
 446         echo '  Where BOARDS is some subset of the following:'
 447         for board in $(sort $(BOARDS)); do echo "    $${board}"; done
 448         echo
 449         echo '  Specifically the following generic default configurations are'
 450         echo '  supported:'
 451         echo
 452         $(foreach cfg,$(generic_defconfigs),
 453           printf "  %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
 454         echo
 455         echo '  The following legacy default configurations have been converted to'
 456         echo '  generic and can still be used:'
 457         echo
 458         $(foreach cfg,$(sort $(legacy_defconfigs)),
 459           printf "  %-24s - Build $($(cfg)-y)\n" $(cfg);)
 460         echo
 461         echo '  Otherwise, the following default configurations are available:'
 462 endef
 463
 464 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
 465 generic_defconfigs :=
 466
 467 #
 468 # If the user generates a generic kernel configuration without specifying a
 469 # list of boards to include the config fragments for, default to including all
 470 # available board config fragments.
 471 #
 472 ifeq ($(BOARDS),)
 473 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
 474 endif
 475
 476 #
 477 # Generic kernel configurations which merge generic_defconfig with the
 478 # appropriate config fragments from arch/mips/configs/generic/, resulting in
 479 # the ability to easily configure the kernel for a given architecture,
 480 # endianness & set of boards without duplicating the needed configuration in
 481 # hundreds of defconfig files.
 482 #
 483 define gen_generic_defconfigs
 484 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
 485 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
 486 generic_defconfigs += $$(target)
 487 $$(target): $(generic_config_dir)/$(bits)$(rev).config
 488 $$(target): $(generic_config_dir)/$(endian).config
 489 )))
 490 endef
 491
 492 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
 493 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
 494
 495 define describe_generic_defconfig
 496 $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
 497 endef
 498
 499 .PHONY: $(generic_defconfigs)
 500 $(generic_defconfigs):
 501         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 502                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
 503                 grep -Ev '^#'
 504         $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
 505         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
 506                 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
 507         $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
 508                 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
 509                 "$(origin BOARDS)" $(BOARDS)
 510         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 511
 512 #
 513 # Prevent generic merge_config rules attempting to merge single fragments
 514 #
 515 $(generic_config_dir)/%.config: ;
 516
 517 #
 518 # Prevent direct use of generic_defconfig, which is intended to be used as the
 519 # basis of the various ISA-specific targets generated above.
 520 #
 521 .PHONY: generic_defconfig
 522 generic_defconfig:
 523         $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
 524         $(Q)echo "used via an ISA-specific target from the following list:"
 525         $(Q)echo
 526         $(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
 527         $(Q)echo
 528         $(Q)false
 529
 530 #
 531 # Legacy defconfig compatibility - these targets used to be real defconfigs but
 532 # now that the boards have been converted to use the generic kernel they are
 533 # wrappers around the generic rules above.
 534 #
 535 legacy_defconfigs               += ocelot_defconfig
 536 ocelot_defconfig-y              := 32r2el_defconfig BOARDS=ocelot
 537
 538 legacy_defconfigs               += sead3_defconfig
 539 sead3_defconfig-y               := 32r2el_defconfig BOARDS=sead-3
 540
 541 legacy_defconfigs               += sead3micro_defconfig
 542 sead3micro_defconfig-y          := micro32r2el_defconfig BOARDS=sead-3
 543
 544 legacy_defconfigs               += xilfpga_defconfig
 545 xilfpga_defconfig-y             := 32r2el_defconfig BOARDS=xilfpga
 546
 547 .PHONY: $(legacy_defconfigs)
 548 $(legacy_defconfigs):
 549         $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)