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         $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
  18
  19 KBUILD_DEFCONFIG := 32r2el_defconfig
  20
  21 #
  22 # Select the object file format to substitute into the linker script.
  23 #
  24 ifdef CONFIG_CPU_LITTLE_ENDIAN
  25 32bit-tool-archpref     = mipsel
  26 64bit-tool-archpref     = mips64el
  27 32bit-bfd               = elf32-tradlittlemips
  28 64bit-bfd               = elf64-tradlittlemips
  29 32bit-emul              = elf32ltsmip
  30 64bit-emul              = elf64ltsmip
  31 else
  32 32bit-tool-archpref     = mips
  33 64bit-tool-archpref     = mips64
  34 32bit-bfd               = elf32-tradbigmips
  35 64bit-bfd               = elf64-tradbigmips
  36 32bit-emul              = elf32btsmip
  37 64bit-emul              = elf64btsmip
  38 endif
  39
  40 ifdef CONFIG_32BIT
  41 tool-archpref           = $(32bit-tool-archpref)
  42 UTS_MACHINE             := mips
  43 endif
  44 ifdef CONFIG_64BIT
  45 tool-archpref           = $(64bit-tool-archpref)
  46 UTS_MACHINE             := mips64
  47 endif
  48
  49 ifneq ($(SUBARCH),$(ARCH))
  50   ifeq ($(CROSS_COMPILE),)
  51     CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
  52   endif
  53 endif
  54
  55 ifdef CONFIG_FUNCTION_GRAPH_TRACER
  56   ifndef KBUILD_MCOUNT_RA_ADDRESS
  57     ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
  58       cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
  59     endif
  60   endif
  61 endif
  62 cflags-y += $(call cc-option, -mno-check-zero-division)
  63
  64 ifdef CONFIG_32BIT
  65 ld-emul                 = $(32bit-emul)
  66 vmlinux-32              = vmlinux
  67 vmlinux-64              = vmlinux.64
  68
  69 cflags-y                += -mabi=32
  70 endif
  71
  72 ifdef CONFIG_64BIT
  73 ld-emul                 = $(64bit-emul)
  74 vmlinux-32              = vmlinux.32
  75 vmlinux-64              = vmlinux
  76
  77 cflags-y                += -mabi=64
  78 endif
  79
  80 all-$(CONFIG_BOOT_ELF32)        := $(vmlinux-32)
  81 all-$(CONFIG_BOOT_ELF64)        := $(vmlinux-64)
  82 all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
  83
  84 #
  85 # GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
  86 # code since it only slows down the whole thing.  At some point we might make
  87 # use of global pointer optimizations but their use of $28 conflicts with
  88 # the current pointer optimization.
  89 #
  90 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
  91 # machines may also.  Since BFD is incredibly buggy with respect to
  92 # crossformat linking we rely on the elf2ecoff tool for format conversion.
  93 #
  94 cflags-y                        += -G 0 -mno-abicalls -fno-pic -pipe
  95 cflags-y                        += -msoft-float
  96 LDFLAGS_vmlinux                 += -G 0 -static -n -nostdlib
  97 KBUILD_AFLAGS_MODULE            += -mlong-calls
  98 KBUILD_CFLAGS_MODULE            += -mlong-calls
  99
 100 ifeq ($(CONFIG_RELOCATABLE),y)
 101 LDFLAGS_vmlinux                 += --emit-relocs
 102 endif
 103
 104 #
 105 # pass -msoft-float to GAS if it supports it.  However on newer binutils
 106 # (specifically newer than 2.24.51.20140728) we then also need to explicitly
 107 # set ".set hardfloat" in all files which manipulate floating point registers.
 108 #
 109 ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
 110         cflags-y                += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
 111 endif
 112
 113 cflags-y += -ffreestanding
 114
 115 #
 116 # We explicitly add the endianness specifier if needed, this allows
 117 # to compile kernels with a toolchain for the other endianness. We
 118 # carefully avoid to add it redundantly because gcc 3.3/3.4 complains
 119 # when fed the toolchain default!
 120 #
 121 # Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
 122 # 2006-10-10 don't properly change the predefined symbols if -EB / -EL
 123 # are used, so we kludge that here.  A bug has been filed at
 124 # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
 125 #
 126 # clang doesn't suffer from these issues and our checks against -dumpmachine
 127 # don't work so well when cross compiling, since without providing --target
 128 # clang's output will be based upon the build machine. So for clang we simply
 129 # unconditionally specify -EB or -EL as appropriate.
 130 #
 131 ifdef CONFIG_CC_IS_CLANG
 132 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -EB
 133 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -EL
 134 else
 135 undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
 136 undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
 137 predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
 138 predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
 139 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
 140 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
 141 endif
 142
 143 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
 144                                    -fno-omit-frame-pointer
 145
 146 # Some distribution-specific toolchains might pass the -fstack-check
 147 # option during the build, which adds a simple stack-probe at the beginning
 148 # of every function.  This stack probe is to ensure that there is enough
 149 # stack space, else a SEGV is generated.  This is not desirable for MIPS
 150 # as kernel stacks are small, placed in unmapped virtual memory, and do not
 151 # grow when overflowed.  Especially on SGI IP27 platforms, this check will
 152 # lead to a NULL pointer dereference in _raw_spin_lock_irq.
 153 #
 154 # In disassembly, this stack probe appears at the top of a function as:
 155 #    sd         zero,<offset>(sp)
 156 # Where <offset> is a negative value.
 157 #
 158 cflags-y += -fno-stack-check
 159
 160 #
 161 # CPU-dependent compiler/assembler options for optimization.
 162 #
 163 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
 164 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
 165 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
 166 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
 167 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
 168 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
 169 cflags-$(CONFIG_CPU_MIPS32_R1)  += -march=mips32 -Wa,--trap
 170 cflags-$(CONFIG_CPU_MIPS32_R2)  += -march=mips32r2 -Wa,--trap
 171 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap -modd-spreg
 172 cflags-$(CONFIG_CPU_MIPS64_R1)  += -march=mips64 -Wa,--trap
 173 cflags-$(CONFIG_CPU_MIPS64_R2)  += -march=mips64r2 -Wa,--trap
 174 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
 175 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
 176 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
 177                         -Wa,--trap
 178 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
 179                         -Wa,--trap
 180 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
 181                         -Wa,--trap
 182 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
 183                         -Wa,--trap
 184 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
 185                         -Wa,--trap
 186 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
 187 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
 188 cflags-$(CONFIG_CPU_R8000)      += -march=r8000 -Wa,--trap
 189 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
 190                         -Wa,--trap
 191 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
 192 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
 193 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 194 endif
 195 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 196 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
 197
 198 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
 199 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 200 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
 201
 202 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
 203 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
 204 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
 205 # similar directives in the kernel will spam the build logs with the following warnings:
 206 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
 207 # or
 208 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
 209 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
 210 # been fixed properly.
 211 mips-cflags                             := $(cflags-y)
 212 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
 213 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
 214 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
 215 endif
 216 ifeq ($(CONFIG_CPU_MICROMIPS),y)
 217 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
 218 cflags-$(micromips-ase)                 += -mmicromips
 219 endif
 220 ifeq ($(CONFIG_CPU_HAS_MSA),y)
 221 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
 222 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
 223 endif
 224 toolchain-virt                          := $(call cc-option-yn,$(mips-cflags) -mvirt)
 225 cflags-$(toolchain-virt)                += -DTOOLCHAIN_SUPPORTS_VIRT
 226 # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
 227 # only warns
 228 xpa-cflags-y                            := $(mips-cflags)
 229 xpa-cflags-$(micromips-ase)             += -mmicromips -Wa$(comma)-fatal-warnings
 230 toolchain-xpa                           := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
 231 cflags-$(toolchain-xpa)                 += -DTOOLCHAIN_SUPPORTS_XPA
 232 toolchain-crc                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
 233 cflags-$(toolchain-crc)                 += -DTOOLCHAIN_SUPPORTS_CRC
 234 toolchain-dsp                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
 235 cflags-$(toolchain-dsp)                 += -DTOOLCHAIN_SUPPORTS_DSP
 236
 237 #
 238 # Firmware support
 239 #
 240 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
 241 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
 242 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
 243 libs-y                          += arch/mips/fw/lib/
 244
 245 #
 246 # Kernel compression
 247 #
 248 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 249 COMPRESSION_FNAME               = vmlinuz
 250 else
 251 COMPRESSION_FNAME               = vmlinux
 252 endif
 253
 254 #
 255 # Board-dependent options and extra files
 256 #
 257 include arch/mips/Kbuild.platforms
 258
 259 ifdef CONFIG_PHYSICAL_START
 260 load-y                                  = $(CONFIG_PHYSICAL_START)
 261 endif
 262
 263 entry-y                         = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
 264 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
 265 drivers-$(CONFIG_PCI)           += arch/mips/pci/
 266
 267 #
 268 # Automatically detect the build format. By default we choose
 269 # the elf format according to the load address.
 270 # We can always force a build with a 64-bits symbol format by
 271 # passing 'KBUILD_SYM32=no' option to the make's command line.
 272 #
 273 ifdef CONFIG_64BIT
 274   ifndef KBUILD_SYM32
 275     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
 276       KBUILD_SYM32 = y
 277     endif
 278   endif
 279
 280   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
 281     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
 282   else
 283     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
 284       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
 285     endif
 286   endif
 287 endif
 288
 289 KBUILD_AFLAGS   += $(cflags-y)
 290 KBUILD_CFLAGS   += $(cflags-y)
 291 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
 292 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 293
 294 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
 295                   VMLINUX_ENTRY_ADDRESS=$(entry-y) \
 296                   PLATFORM="$(platform-y)" \
 297                   ITS_INPUTS="$(its-y)"
 298 ifdef CONFIG_32BIT
 299 bootvars-y      += ADDR_BITS=32
 300 endif
 301 ifdef CONFIG_64BIT
 302 bootvars-y      += ADDR_BITS=64
 303 endif
 304
 305 # This is required to get dwarf unwinding tables into .debug_frame
 306 # instead of .eh_frame so we don't discard them.
 307 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 308
 309 KBUILD_LDFLAGS          += -m $(ld-emul)
 310
 311 ifdef CONFIG_MIPS
 312 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 313         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
 314         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
 315 endif
 316
 317 OBJCOPYFLAGS            += --remove-section=.reginfo
 318
 319 head-y := arch/mips/kernel/head.o
 320
 321 libs-y                  += arch/mips/lib/
 322 libs-y                  += arch/mips/math-emu/
 323
 324 # See arch/mips/Kbuild for content of core part of the kernel
 325 core-y += arch/mips/
 326
 327 drivers-$(CONFIG_MIPS_CRC_SUPPORT) += arch/mips/crypto/
 328 drivers-$(CONFIG_OPROFILE)      += arch/mips/oprofile/
 329
 330 # suspend and hibernation support
 331 drivers-$(CONFIG_PM)    += arch/mips/power/
 332
 333 # boot image targets (arch/mips/boot/)
 334 boot-y                  := vmlinux.bin
 335 boot-y                  += vmlinux.ecoff
 336 boot-y                  += vmlinux.srec
 337 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 338 boot-y                  += uImage
 339 boot-y                  += uImage.bin
 340 boot-y                  += uImage.bz2
 341 boot-y                  += uImage.gz
 342 boot-y                  += uImage.lzma
 343 boot-y                  += uImage.lzo
 344 endif
 345 boot-y                  += vmlinux.itb
 346 boot-y                  += vmlinux.gz.itb
 347 boot-y                  += vmlinux.bz2.itb
 348 boot-y                  += vmlinux.lzma.itb
 349 boot-y                  += vmlinux.lzo.itb
 350
 351 # compressed boot image targets (arch/mips/boot/compressed/)
 352 bootz-y                 := vmlinuz
 353 bootz-y                 += vmlinuz.bin
 354 bootz-y                 += vmlinuz.ecoff
 355 bootz-y                 += vmlinuz.srec
 356 ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
 357 bootz-y                 += uzImage.bin
 358 endif
 359
 360 ifdef CONFIG_LASAT
 361 rom.bin rom.sw: vmlinux
 362         $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
 363                 $(bootvars-y) $@
 364 endif
 365
 366 #
 367 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
 368 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
 369 # convert to ECOFF using elf2ecoff.
 370 #
 371 quiet_cmd_32 = OBJCOPY $@
 372         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
 373 vmlinux.32: vmlinux
 374         $(call cmd,32)
 375
 376 #
 377 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
 378 # ELF files from 32-bit files by conversion.
 379 #
 380 quiet_cmd_64 = OBJCOPY $@
 381         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
 382 vmlinux.64: vmlinux
 383         $(call cmd,64)
 384
 385 all:    $(all-y)
 386
 387 # boot
 388 $(boot-y): $(vmlinux-32) FORCE
 389         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
 390                 $(bootvars-y) arch/mips/boot/$@
 391
 392 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 393 # boot/compressed
 394 $(bootz-y): $(vmlinux-32) FORCE
 395         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
 396                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
 397 else
 398 vmlinuz: FORCE
 399         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
 400         /bin/false
 401 endif
 402
 403
 404 CLEAN_FILES += vmlinux.32 vmlinux.64
 405
 406 # device-trees
 407 core-y += arch/mips/boot/dts/
 408
 409 archprepare:
 410 ifdef CONFIG_MIPS32_N32
 411         @$(kecho) '  Checking missing-syscalls for N32'
 412         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
 413 endif
 414 ifdef CONFIG_MIPS32_O32
 415         @$(kecho) '  Checking missing-syscalls for O32'
 416         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
 417 endif
 418
 419 install:
 420         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
 421 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 422         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
 423 endif
 424         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
 425         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
 426
 427 archclean:
 428         $(Q)$(MAKE) $(clean)=arch/mips/boot
 429         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
 430         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
 431         $(Q)$(MAKE) $(clean)=arch/mips/lasat
 432
 433 define archhelp
 434         echo '  install              - install kernel into $(INSTALL_PATH)'
 435         echo '  vmlinux.ecoff        - ECOFF boot image'
 436         echo '  vmlinux.bin          - Raw binary boot image'
 437         echo '  vmlinux.srec         - SREC boot image'
 438         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
 439         echo '  vmlinuz              - Compressed boot(zboot) image'
 440         echo '  vmlinuz.ecoff        - ECOFF zboot image'
 441         echo '  vmlinuz.bin          - Raw binary zboot image'
 442         echo '  vmlinuz.srec         - SREC zboot image'
 443         echo '  uImage               - U-Boot image'
 444         echo '  uImage.bin           - U-Boot image (uncompressed)'
 445         echo '  uImage.bz2           - U-Boot image (bz2)'
 446         echo '  uImage.gz            - U-Boot image (gzip)'
 447         echo '  uImage.lzma          - U-Boot image (lzma)'
 448         echo '  uImage.lzo           - U-Boot image (lzo)'
 449         echo '  uzImage.bin          - U-Boot image (self-extracting)'
 450         echo
 451         echo '  These will be default as appropriate for a configured platform.'
 452         echo
 453         echo '  If you are targeting a system supported by generic kernels you may'
 454         echo '  configure the kernel for a given architecture target like so:'
 455         echo
 456         echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
 457         echo
 458         echo '  Where BOARDS is some subset of the following:'
 459         for board in $(sort $(BOARDS)); do echo "    $${board}"; done
 460         echo
 461         echo '  Specifically the following generic default configurations are'
 462         echo '  supported:'
 463         echo
 464         $(foreach cfg,$(generic_defconfigs),
 465           printf "  %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
 466         echo
 467         echo '  The following legacy default configurations have been converted to'
 468         echo '  generic and can still be used:'
 469         echo
 470         $(foreach cfg,$(sort $(legacy_defconfigs)),
 471           printf "  %-24s - Build $($(cfg)-y)\n" $(cfg);)
 472         echo
 473         echo '  Otherwise, the following default configurations are available:'
 474 endef
 475
 476 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
 477 generic_defconfigs :=
 478
 479 #
 480 # If the user generates a generic kernel configuration without specifying a
 481 # list of boards to include the config fragments for, default to including all
 482 # available board config fragments.
 483 #
 484 ifeq ($(BOARDS),)
 485 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
 486 endif
 487
 488 #
 489 # Generic kernel configurations which merge generic_defconfig with the
 490 # appropriate config fragments from arch/mips/configs/generic/, resulting in
 491 # the ability to easily configure the kernel for a given architecture,
 492 # endianness & set of boards without duplicating the needed configuration in
 493 # hundreds of defconfig files.
 494 #
 495 define gen_generic_defconfigs
 496 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
 497 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
 498 generic_defconfigs += $$(target)
 499 $$(target): $(generic_config_dir)/$(bits)$(rev).config
 500 $$(target): $(generic_config_dir)/$(endian).config
 501 )))
 502 endef
 503
 504 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
 505 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
 506
 507 define describe_generic_defconfig
 508 $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
 509 endef
 510
 511 .PHONY: $(generic_defconfigs)
 512 $(generic_defconfigs):
 513         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 514                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
 515                 grep -Ev '^#'
 516         $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
 517         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
 518                 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
 519         $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
 520                 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
 521                 "$(origin BOARDS)" $(BOARDS)
 522         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 523
 524 #
 525 # Prevent generic merge_config rules attempting to merge single fragments
 526 #
 527 $(generic_config_dir)/%.config: ;
 528
 529 #
 530 # Prevent direct use of generic_defconfig, which is intended to be used as the
 531 # basis of the various ISA-specific targets generated above.
 532 #
 533 .PHONY: generic_defconfig
 534 generic_defconfig:
 535         $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
 536         $(Q)echo "used via an ISA-specific target from the following list:"
 537         $(Q)echo
 538         $(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
 539         $(Q)echo
 540         $(Q)false
 541
 542 #
 543 # Legacy defconfig compatibility - these targets used to be real defconfigs but
 544 # now that the boards have been converted to use the generic kernel they are
 545 # wrappers around the generic rules above.
 546 #
 547 legacy_defconfigs               += ocelot_defconfig
 548 ocelot_defconfig-y              := 32r2el_defconfig BOARDS=ocelot
 549
 550 legacy_defconfigs               += sead3_defconfig
 551 sead3_defconfig-y               := 32r2el_defconfig BOARDS=sead-3
 552
 553 legacy_defconfigs               += sead3micro_defconfig
 554 sead3micro_defconfig-y          := micro32r2el_defconfig BOARDS=sead-3
 555
 556 legacy_defconfigs               += xilfpga_defconfig
 557 xilfpga_defconfig-y             := 32r2el_defconfig BOARDS=xilfpga
 558
 559 .PHONY: $(legacy_defconfigs)
 560 $(legacy_defconfigs):
 561         $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)