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/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) += $(call cc-option,-mno-sched-prolog) \
 133                                    -fno-omit-frame-pointer
 134
 135 # Some distribution-specific toolchains might pass the -fstack-check
 136 # option during the build, which adds a simple stack-probe at the beginning
 137 # of every function.  This stack probe is to ensure that there is enough
 138 # stack space, else a SEGV is generated.  This is not desirable for MIPS
 139 # as kernel stacks are small, placed in unmapped virtual memory, and do not
 140 # grow when overflowed.  Especially on SGI IP27 platforms, this check will
 141 # lead to a NULL pointer dereference in _raw_spin_lock_irq.
 142 #
 143 # In disassembly, this stack probe appears at the top of a function as:
 144 #    sd         zero,<offset>(sp)
 145 # Where <offset> is a negative value.
 146 #
 147 cflags-y += -fno-stack-check
 148
 149 #
 150 # CPU-dependent compiler/assembler options for optimization.
 151 #
 152 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
 153 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
 154 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
 155 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
 156 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
 157 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
 158 cflags-$(CONFIG_CPU_MIPS32_R1)  += -march=mips32 -Wa,--trap
 159 cflags-$(CONFIG_CPU_MIPS32_R2)  += -march=mips32r2 -Wa,--trap
 160 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap -modd-spreg
 161 cflags-$(CONFIG_CPU_MIPS64_R1)  += -march=mips64 -Wa,--trap
 162 cflags-$(CONFIG_CPU_MIPS64_R2)  += -march=mips64r2 -Wa,--trap
 163 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
 164 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
 165 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
 166                         -Wa,--trap
 167 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
 168                         -Wa,--trap
 169 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
 170                         -Wa,--trap
 171 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
 172                         -Wa,--trap
 173 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
 174                         -Wa,--trap
 175 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
 176 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
 177 cflags-$(CONFIG_CPU_R8000)      += -march=r8000 -Wa,--trap
 178 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
 179                         -Wa,--trap
 180 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
 181 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
 182 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 183 endif
 184 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 185 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
 186
 187 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
 188 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 189 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
 190
 191 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
 192 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
 193 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
 194 # similar directives in the kernel will spam the build logs with the following warnings:
 195 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
 196 # or
 197 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
 198 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
 199 # been fixed properly.
 200 mips-cflags                             := $(cflags-y)
 201 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
 202 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
 203 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
 204 endif
 205 ifeq ($(CONFIG_CPU_MICROMIPS),y)
 206 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
 207 cflags-$(micromips-ase)                 += -mmicromips
 208 endif
 209 ifeq ($(CONFIG_CPU_HAS_MSA),y)
 210 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
 211 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
 212 endif
 213 toolchain-virt                          := $(call cc-option-yn,$(mips-cflags) -mvirt)
 214 cflags-$(toolchain-virt)                += -DTOOLCHAIN_SUPPORTS_VIRT
 215
 216 #
 217 # Firmware support
 218 #
 219 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
 220 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
 221 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
 222 libs-y                          += arch/mips/fw/lib/
 223
 224 #
 225 # Kernel compression
 226 #
 227 ifdef SYS_SUPPORTS_ZBOOT
 228 COMPRESSION_FNAME               = vmlinuz
 229 else
 230 COMPRESSION_FNAME               = vmlinux
 231 endif
 232
 233 #
 234 # Board-dependent options and extra files
 235 #
 236 include arch/mips/Kbuild.platforms
 237
 238 ifdef CONFIG_PHYSICAL_START
 239 load-y                                  = $(CONFIG_PHYSICAL_START)
 240 endif
 241
 242 entry-noisa-y                           = 0x$(shell $(NM) vmlinux 2>/dev/null \
 243                                         | grep "\bkernel_entry\b" | cut -f1 -d \ )
 244 ifdef CONFIG_CPU_MICROMIPS
 245   #
 246   # Set the ISA bit, since the kernel_entry symbol in the ELF will have it
 247   # clear which would lead to images containing addresses which bootloaders may
 248   # jump to as MIPS32 code.
 249   #
 250   entry-y = $(patsubst %0,%1,$(patsubst %2,%3,$(patsubst %4,%5, \
 251               $(patsubst %6,%7,$(patsubst %8,%9,$(patsubst %a,%b, \
 252               $(patsubst %c,%d,$(patsubst %e,%f,$(entry-noisa-y)))))))))
 253 else
 254   entry-y = $(entry-noisa-y)
 255 endif
 256
 257 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
 258 drivers-$(CONFIG_PCI)           += arch/mips/pci/
 259
 260 #
 261 # Automatically detect the build format. By default we choose
 262 # the elf format according to the load address.
 263 # We can always force a build with a 64-bits symbol format by
 264 # passing 'KBUILD_SYM32=no' option to the make's command line.
 265 #
 266 ifdef CONFIG_64BIT
 267   ifndef KBUILD_SYM32
 268     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
 269       KBUILD_SYM32 = y
 270     endif
 271   endif
 272
 273   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
 274     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
 275   else
 276     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
 277       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
 278     endif
 279   endif
 280 endif
 281
 282 KBUILD_AFLAGS   += $(cflags-y)
 283 KBUILD_CFLAGS   += $(cflags-y)
 284 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
 285 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 286
 287 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
 288                   VMLINUX_ENTRY_ADDRESS=$(entry-y) \
 289                   PLATFORM="$(platform-y)" \
 290                   ITS_INPUTS="$(its-y)"
 291 ifdef CONFIG_32BIT
 292 bootvars-y      += ADDR_BITS=32
 293 endif
 294 ifdef CONFIG_64BIT
 295 bootvars-y      += ADDR_BITS=64
 296 endif
 297
 298 # This is required to get dwarf unwinding tables into .debug_frame
 299 # instead of .eh_frame so we don't discard them.
 300 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 301
 302 LDFLAGS                 += -m $(ld-emul)
 303
 304 ifdef CONFIG_MIPS
 305 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 306         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
 307         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
 308 ifdef CONFIG_64BIT
 309 CHECKFLAGS              += -m64
 310 endif
 311 endif
 312
 313 OBJCOPYFLAGS            += --remove-section=.reginfo
 314
 315 head-y := arch/mips/kernel/head.o
 316
 317 libs-y                  += arch/mips/lib/
 318 libs-y                  += arch/mips/math-emu/
 319
 320 # See arch/mips/Kbuild for content of core part of the kernel
 321 core-y += arch/mips/
 322
 323 drivers-$(CONFIG_OPROFILE)      += arch/mips/oprofile/
 324
 325 # suspend and hibernation support
 326 drivers-$(CONFIG_PM)    += arch/mips/power/
 327
 328 # boot image targets (arch/mips/boot/)
 329 boot-y                  := vmlinux.bin
 330 boot-y                  += vmlinux.ecoff
 331 boot-y                  += vmlinux.srec
 332 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 333 boot-y                  += uImage
 334 boot-y                  += uImage.bin
 335 boot-y                  += uImage.bz2
 336 boot-y                  += uImage.gz
 337 boot-y                  += uImage.lzma
 338 boot-y                  += uImage.lzo
 339 endif
 340 boot-y                  += vmlinux.itb
 341 boot-y                  += vmlinux.gz.itb
 342 boot-y                  += vmlinux.bz2.itb
 343 boot-y                  += vmlinux.lzma.itb
 344 boot-y                  += vmlinux.lzo.itb
 345
 346 # compressed boot image targets (arch/mips/boot/compressed/)
 347 bootz-y                 := vmlinuz
 348 bootz-y                 += vmlinuz.bin
 349 bootz-y                 += vmlinuz.ecoff
 350 bootz-y                 += vmlinuz.srec
 351 ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
 352 bootz-y                 += uzImage.bin
 353 endif
 354
 355 ifdef CONFIG_LASAT
 356 rom.bin rom.sw: vmlinux
 357         $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
 358                 $(bootvars-y) $@
 359 endif
 360
 361 #
 362 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
 363 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
 364 # convert to ECOFF using elf2ecoff.
 365 #
 366 quiet_cmd_32 = OBJCOPY $@
 367         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
 368 vmlinux.32: vmlinux
 369         $(call cmd,32)
 370
 371 #
 372 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
 373 # ELF files from 32-bit files by conversion.
 374 #
 375 quiet_cmd_64 = OBJCOPY $@
 376         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
 377 vmlinux.64: vmlinux
 378         $(call cmd,64)
 379
 380 all:    $(all-y)
 381
 382 # boot
 383 $(boot-y): $(vmlinux-32) FORCE
 384         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
 385                 $(bootvars-y) arch/mips/boot/$@
 386
 387 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 388 # boot/compressed
 389 $(bootz-y): $(vmlinux-32) FORCE
 390         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
 391                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
 392 else
 393 vmlinuz: FORCE
 394         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
 395         /bin/false
 396 endif
 397
 398
 399 CLEAN_FILES += vmlinux.32 vmlinux.64
 400
 401 # device-trees
 402 core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
 403
 404 %.dtb %.dtb.S %.dtb.o: | scripts
 405         $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
 406
 407 PHONY += dtbs
 408 dtbs: scripts
 409         $(Q)$(MAKE) $(build)=arch/mips/boot/dts
 410
 411 PHONY += dtbs_install
 412 dtbs_install:
 413         $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
 414
 415 archprepare:
 416 ifdef CONFIG_MIPS32_N32
 417         @$(kecho) '  Checking missing-syscalls for N32'
 418         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
 419 endif
 420 ifdef CONFIG_MIPS32_O32
 421         @$(kecho) '  Checking missing-syscalls for O32'
 422         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
 423 endif
 424
 425 install:
 426         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
 427 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 428         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
 429 endif
 430         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
 431         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
 432
 433 archclean:
 434         $(Q)$(MAKE) $(clean)=arch/mips/boot
 435         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
 436         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
 437         $(Q)$(MAKE) $(clean)=arch/mips/lasat
 438
 439 define archhelp
 440         echo '  install              - install kernel into $(INSTALL_PATH)'
 441         echo '  vmlinux.ecoff        - ECOFF boot image'
 442         echo '  vmlinux.bin          - Raw binary boot image'
 443         echo '  vmlinux.srec         - SREC boot image'
 444         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
 445         echo '  vmlinuz              - Compressed boot(zboot) image'
 446         echo '  vmlinuz.ecoff        - ECOFF zboot image'
 447         echo '  vmlinuz.bin          - Raw binary zboot image'
 448         echo '  vmlinuz.srec         - SREC zboot image'
 449         echo '  uImage               - U-Boot image'
 450         echo '  uImage.bin           - U-Boot image (uncompressed)'
 451         echo '  uImage.bz2           - U-Boot image (bz2)'
 452         echo '  uImage.gz            - U-Boot image (gzip)'
 453         echo '  uImage.lzma          - U-Boot image (lzma)'
 454         echo '  uImage.lzo           - U-Boot image (lzo)'
 455         echo '  uzImage.bin          - U-Boot image (self-extracting)'
 456         echo '  dtbs                 - Device-tree blobs for enabled boards'
 457         echo '  dtbs_install         - Install dtbs to $(INSTALL_DTBS_PATH)'
 458         echo
 459         echo '  These will be default as appropriate for a configured platform.'
 460         echo
 461         echo '  If you are targeting a system supported by generic kernels you may'
 462         echo '  configure the kernel for a given architecture target like so:'
 463         echo
 464         echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
 465         echo
 466         echo '  Otherwise, the following default configurations are available:'
 467 endef
 468
 469 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
 470 generic_defconfigs :=
 471
 472 #
 473 # If the user generates a generic kernel configuration without specifying a
 474 # list of boards to include the config fragments for, default to including all
 475 # available board config fragments.
 476 #
 477 ifeq ($(BOARDS),)
 478 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
 479 endif
 480
 481 #
 482 # Generic kernel configurations which merge generic_defconfig with the
 483 # appropriate config fragments from arch/mips/configs/generic/, resulting in
 484 # the ability to easily configure the kernel for a given architecture,
 485 # endianness & set of boards without duplicating the needed configuration in
 486 # hundreds of defconfig files.
 487 #
 488 define gen_generic_defconfigs
 489 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
 490 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
 491 generic_defconfigs += $$(target)
 492 $$(target): $(generic_config_dir)/$(bits)$(rev).config
 493 $$(target): $(generic_config_dir)/$(endian).config
 494 )))
 495 endef
 496
 497 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
 498 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
 499
 500 .PHONY: $(generic_defconfigs)
 501 $(generic_defconfigs):
 502         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 503                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
 504                 grep -Ev '^#'
 505         $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
 506         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
 507                 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
 508         $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
 509                 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
 510                 "$(origin BOARDS)" $(BOARDS)
 511         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 512
 513 #
 514 # Prevent generic merge_config rules attempting to merge single fragments
 515 #
 516 $(generic_config_dir)/%.config: ;
 517
 518 #
 519 # Prevent direct use of generic_defconfig, which is intended to be used as the
 520 # basis of the various ISA-specific targets generated above.
 521 #
 522 .PHONY: generic_defconfig
 523 generic_defconfig:
 524         $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
 525         $(Q)echo "used via an ISA-specific target from the following list:"
 526         $(Q)echo
 527         $(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
 528         $(Q)echo
 529         $(Q)false
 530
 531 #
 532 # Legacy defconfig compatibility - these targets used to be real defconfigs but
 533 # now that the boards have been converted to use the generic kernel they are
 534 # wrappers around the generic rules above.
 535 #
 536 .PHONY: sead3_defconfig
 537 sead3_defconfig:
 538         $(Q)$(MAKE) -f $(srctree)/Makefile 32r2el_defconfig BOARDS=sead-3
 539
 540 .PHONY: sead3micro_defconfig
 541 sead3micro_defconfig:
 542         $(Q)$(MAKE) -f $(srctree)/Makefile micro32r2el_defconfig BOARDS=sead-3