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           = $(64bit-tool-archpref)
  50 UTS_MACHINE             := mips64
  51 endif
  52
  53 ifdef cross_compiling
  54   ifeq ($(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 # binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,
 140 # supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll
 141 # instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h
 142 # for a description).
 143 #
 144 # We disable this in order to prevent the assembler meddling with the
 145 # instruction that labels refer to, ie. if we label an ll instruction:
 146 #
 147 # 1: ll v0, 0(a0)
 148 #
 149 # ...then with the assembler fix applied the label may actually point at a sync
 150 # instruction inserted by the assembler, and if we were using the label in an
 151 # exception table the table would no longer contain the address of the ll
 152 # instruction.
 153 #
 154 # Avoid this by explicitly disabling that assembler behaviour.
 155 #
 156 cflags-y += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
 157
 158 #
 159 # CPU-dependent compiler/assembler options for optimization.
 160 #
 161 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
 162 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
 163 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
 164 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
 165 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
 166 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
 167 cflags-$(CONFIG_CPU_MIPS32_R1)  += -march=mips32 -Wa,--trap
 168 cflags-$(CONFIG_CPU_MIPS32_R2)  += -march=mips32r2 -Wa,--trap
 169 cflags-$(CONFIG_CPU_MIPS32_R5)  += -march=mips32r5 -Wa,--trap -modd-spreg
 170 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap -modd-spreg
 171 cflags-$(CONFIG_CPU_MIPS64_R1)  += -march=mips64 -Wa,--trap
 172 cflags-$(CONFIG_CPU_MIPS64_R2)  += -march=mips64r2 -Wa,--trap
 173 cflags-$(CONFIG_CPU_MIPS64_R5)  += -march=mips64r5 -Wa,--trap
 174 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
 175 cflags-$(CONFIG_CPU_P5600)      += -march=p5600 -Wa,--trap -modd-spreg
 176 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
 177 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
 178                         -Wa,--trap
 179 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
 180                         -Wa,--trap
 181 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
 182                         -Wa,--trap
 183 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
 184                         -Wa,--trap
 185 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
 186 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
 187 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
 188                         -Wa,--trap
 189 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
 190 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
 191 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 192 endif
 193 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 194 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
 195
 196 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
 197 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 198 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
 199
 200 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
 201 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
 202 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
 203 # similar directives in the kernel will spam the build logs with the following warnings:
 204 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
 205 # or
 206 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
 207 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
 208 # been fixed properly.
 209 mips-cflags                             := $(cflags-y)
 210 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
 211 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
 212 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
 213 endif
 214 ifeq ($(CONFIG_CPU_MICROMIPS),y)
 215 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
 216 cflags-$(micromips-ase)                 += -mmicromips
 217 endif
 218 ifeq ($(CONFIG_CPU_HAS_MSA),y)
 219 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
 220 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
 221 endif
 222 toolchain-virt                          := $(call cc-option-yn,$(mips-cflags) -mvirt)
 223 cflags-$(toolchain-virt)                += -DTOOLCHAIN_SUPPORTS_VIRT
 224 # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
 225 # only warns
 226 xpa-cflags-y                            := $(mips-cflags)
 227 xpa-cflags-$(micromips-ase)             += -mmicromips -Wa$(comma)-fatal-warnings
 228 toolchain-xpa                           := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
 229 cflags-$(toolchain-xpa)                 += -DTOOLCHAIN_SUPPORTS_XPA
 230 toolchain-crc                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
 231 cflags-$(toolchain-crc)                 += -DTOOLCHAIN_SUPPORTS_CRC
 232 toolchain-dsp                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
 233 cflags-$(toolchain-dsp)                 += -DTOOLCHAIN_SUPPORTS_DSP
 234 toolchain-ginv                          := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
 235 cflags-$(toolchain-ginv)                += -DTOOLCHAIN_SUPPORTS_GINV
 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 # When linking a 32-bit executable the LLVM linker cannot cope with a
 290 # 32-bit load address that has been sign-extended to 64 bits.  Simply
 291 # remove the upper 32 bits then, as it is safe to do so with other
 292 # linkers.
 293 ifdef CONFIG_64BIT
 294         load-ld                 = $(load-y)
 295 else
 296         load-ld                 = $(subst 0xffffffff,0x,$(load-y))
 297 endif
 298
 299 KBUILD_AFLAGS   += $(cflags-y)
 300 KBUILD_CFLAGS   += $(cflags-y)
 301 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
 302 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 303
 304 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
 305                   LINKER_LOAD_ADDRESS=$(load-ld) \
 306                   VMLINUX_ENTRY_ADDRESS=$(entry-y) \
 307                   PLATFORM="$(platform-y)" \
 308                   ITS_INPUTS="$(its-y)"
 309 ifdef CONFIG_32BIT
 310 bootvars-y      += ADDR_BITS=32
 311 endif
 312 ifdef CONFIG_64BIT
 313 bootvars-y      += ADDR_BITS=64
 314 endif
 315
 316 # This is required to get dwarf unwinding tables into .debug_frame
 317 # instead of .eh_frame so we don't discard them.
 318 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 319
 320 KBUILD_LDFLAGS          += -m $(ld-emul)
 321
 322 ifdef CONFIG_MIPS
 323 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 324         egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
 325         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
 326 endif
 327
 328 OBJCOPYFLAGS            += --remove-section=.reginfo
 329
 330 head-y := arch/mips/kernel/head.o
 331
 332 libs-y                  += arch/mips/lib/
 333 libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
 334
 335 drivers-y                       += arch/mips/crypto/
 336
 337 # suspend and hibernation support
 338 drivers-$(CONFIG_PM)    += arch/mips/power/
 339
 340 # boot image targets (arch/mips/boot/)
 341 boot-y                  := vmlinux.bin
 342 boot-y                  += vmlinux.ecoff
 343 boot-y                  += vmlinux.srec
 344 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 345 boot-y                  += uImage
 346 boot-y                  += uImage.bin
 347 boot-y                  += uImage.bz2
 348 boot-y                  += uImage.gz
 349 boot-y                  += uImage.lzma
 350 boot-y                  += uImage.lzo
 351 endif
 352 boot-y                  += vmlinux.itb
 353 boot-y                  += vmlinux.gz.itb
 354 boot-y                  += vmlinux.bz2.itb
 355 boot-y                  += vmlinux.lzma.itb
 356 boot-y                  += vmlinux.lzo.itb
 357
 358 # compressed boot image targets (arch/mips/boot/compressed/)
 359 bootz-y                 := vmlinuz
 360 bootz-y                 += vmlinuz.bin
 361 bootz-y                 += vmlinuz.ecoff
 362 bootz-y                 += vmlinuz.srec
 363 ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
 364 bootz-y                 += uzImage.bin
 365 endif
 366 bootz-y                 += vmlinuz.itb
 367
 368 #
 369 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
 370 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
 371 # convert to ECOFF using elf2ecoff.
 372 #
 373 quiet_cmd_32 = OBJCOPY $@
 374         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
 375 vmlinux.32: vmlinux
 376         $(call cmd,32)
 377
 378 #
 379 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
 380 # ELF files from 32-bit files by conversion.
 381 #
 382 quiet_cmd_64 = OBJCOPY $@
 383         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
 384 vmlinux.64: vmlinux
 385         $(call cmd,64)
 386
 387 all:    $(all-y) $(KBUILD_DTBS)
 388
 389 # boot
 390 $(boot-y): $(vmlinux-32) FORCE
 391         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
 392                 $(bootvars-y) arch/mips/boot/$@
 393
 394 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 395 # boot/compressed
 396 $(bootz-y): $(vmlinux-32) FORCE
 397         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
 398                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
 399 else
 400 vmlinuz: FORCE
 401         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
 402         /bin/false
 403 endif
 404
 405
 406 CLEAN_FILES += vmlinux.32 vmlinux.64
 407
 408 # device-trees
 409 core-y += arch/mips/boot/dts/
 410
 411 archprepare:
 412 ifdef CONFIG_MIPS32_N32
 413         @$(kecho) '  Checking missing-syscalls for N32'
 414         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
 415 endif
 416 ifdef CONFIG_MIPS32_O32
 417         @$(kecho) '  Checking missing-syscalls for O32'
 418         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
 419 endif
 420
 421 install:
 422         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
 423 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 424         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
 425 endif
 426         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
 427         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
 428
 429 archclean:
 430         $(Q)$(MAKE) $(clean)=arch/mips/boot
 431         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
 432         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
 433
 434 archheaders:
 435         $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
 436
 437 define archhelp
 438         echo '  install              - install kernel into $(INSTALL_PATH)'
 439         echo '  vmlinux.ecoff        - ECOFF boot image'
 440         echo '  vmlinux.bin          - Raw binary boot image'
 441         echo '  vmlinux.srec         - SREC boot image'
 442         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
 443         echo '  vmlinuz              - Compressed boot(zboot) image'
 444         echo '  vmlinuz.ecoff        - ECOFF zboot image'
 445         echo '  vmlinuz.bin          - Raw binary zboot image'
 446         echo '  vmlinuz.srec         - SREC zboot image'
 447         echo '  uImage               - U-Boot image'
 448         echo '  uImage.bin           - U-Boot image (uncompressed)'
 449         echo '  uImage.bz2           - U-Boot image (bz2)'
 450         echo '  uImage.gz            - U-Boot image (gzip)'
 451         echo '  uImage.lzma          - U-Boot image (lzma)'
 452         echo '  uImage.lzo           - U-Boot image (lzo)'
 453         echo '  uzImage.bin          - U-Boot image (self-extracting)'
 454         echo
 455         echo '  These will be default as appropriate for a configured platform.'
 456         echo
 457         echo '  If you are targeting a system supported by generic kernels you may'
 458         echo '  configure the kernel for a given architecture target like so:'
 459         echo
 460         echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
 461         echo
 462         echo '  Where BOARDS is some subset of the following:'
 463         for board in $(sort $(BOARDS)); do echo "    $${board}"; done
 464         echo
 465         echo '  Specifically the following generic default configurations are'
 466         echo '  supported:'
 467         echo
 468         $(foreach cfg,$(generic_defconfigs),
 469           printf "  %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
 470         echo
 471         echo '  The following legacy default configurations have been converted to'
 472         echo '  generic and can still be used:'
 473         echo
 474         $(foreach cfg,$(sort $(legacy_defconfigs)),
 475           printf "  %-24s - Build $($(cfg)-y)\n" $(cfg);)
 476         echo
 477         echo '  Otherwise, the following default configurations are available:'
 478 endef
 479
 480 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
 481 generic_defconfigs :=
 482
 483 #
 484 # If the user generates a generic kernel configuration without specifying a
 485 # list of boards to include the config fragments for, default to including all
 486 # available board config fragments.
 487 #
 488 ifeq ($(BOARDS),)
 489 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
 490 endif
 491
 492 #
 493 # Generic kernel configurations which merge generic_defconfig with the
 494 # appropriate config fragments from arch/mips/configs/generic/, resulting in
 495 # the ability to easily configure the kernel for a given architecture,
 496 # endianness & set of boards without duplicating the needed configuration in
 497 # hundreds of defconfig files.
 498 #
 499 define gen_generic_defconfigs
 500 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
 501 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
 502 generic_defconfigs += $$(target)
 503 $$(target): $(generic_config_dir)/$(bits)$(rev).config
 504 $$(target): $(generic_config_dir)/$(endian).config
 505 )))
 506 endef
 507
 508 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
 509 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
 510
 511 define describe_generic_defconfig
 512 $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
 513 endef
 514
 515 .PHONY: $(generic_defconfigs)
 516 $(generic_defconfigs):
 517         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 518                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
 519                 grep -Ev '^#'
 520         $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
 521         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
 522                 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
 523         $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
 524                 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
 525                 "$(origin BOARDS)" $(BOARDS)
 526         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 527
 528 #
 529 # Prevent generic merge_config rules attempting to merge single fragments
 530 #
 531 $(generic_config_dir)/%.config: ;
 532
 533 #
 534 # Prevent direct use of generic_defconfig, which is intended to be used as the
 535 # basis of the various ISA-specific targets generated above.
 536 #
 537 .PHONY: generic_defconfig
 538 generic_defconfig:
 539         $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
 540         $(Q)echo "used via an ISA-specific target from the following list:"
 541         $(Q)echo
 542         $(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
 543         $(Q)echo
 544         $(Q)false
 545
 546 #
 547 # Legacy defconfig compatibility - these targets used to be real defconfigs but
 548 # now that the boards have been converted to use the generic kernel they are
 549 # wrappers around the generic rules above.
 550 #
 551 legacy_defconfigs               += ocelot_defconfig
 552 ocelot_defconfig-y              := 32r2el_defconfig BOARDS=ocelot
 553
 554 legacy_defconfigs               += sead3_defconfig
 555 sead3_defconfig-y               := 32r2el_defconfig BOARDS=sead-3
 556
 557 legacy_defconfigs               += sead3micro_defconfig
 558 sead3micro_defconfig-y          := micro32r2el_defconfig BOARDS=sead-3
 559
 560 legacy_defconfigs               += xilfpga_defconfig
 561 xilfpga_defconfig-y             := 32r2el_defconfig BOARDS=xilfpga
 562
 563 .PHONY: $(legacy_defconfigs)
 564 $(legacy_defconfigs):
 565         $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)