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 KBUILD_DTBS      := dtbs
  21
  22 #
  23 # Select the object file format to substitute into the linker script.
  24 #
  25 ifdef CONFIG_CPU_LITTLE_ENDIAN
  26 32bit-tool-archpref     = mipsel
  27 64bit-tool-archpref     = mips64el
  28 32bit-bfd               = elf32-tradlittlemips
  29 64bit-bfd               = elf64-tradlittlemips
  30 32bit-emul              = elf32ltsmip
  31 64bit-emul              = elf64ltsmip
  32 else
  33 32bit-tool-archpref     = mips
  34 64bit-tool-archpref     = mips64
  35 32bit-bfd               = elf32-tradbigmips
  36 64bit-bfd               = elf64-tradbigmips
  37 32bit-emul              = elf32btsmip
  38 64bit-emul              = elf64btsmip
  39 endif
  40
  41 ifdef CONFIG_32BIT
  42 tool-archpref           = $(32bit-tool-archpref)
  43 UTS_MACHINE             := mips
  44 endif
  45 ifdef CONFIG_64BIT
  46 tool-archpref           = $(64bit-tool-archpref)
  47 UTS_MACHINE             := mips64
  48 endif
  49
  50 ifneq ($(SUBARCH),$(ARCH))
  51   ifeq ($(CROSS_COMPILE),)
  52     CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
  53   endif
  54 endif
  55
  56 ifdef CONFIG_FUNCTION_GRAPH_TRACER
  57   ifndef KBUILD_MCOUNT_RA_ADDRESS
  58     ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
  59       cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
  60     endif
  61   endif
  62 endif
  63 cflags-y += $(call cc-option, -mno-check-zero-division)
  64
  65 ifdef CONFIG_32BIT
  66 ld-emul                 = $(32bit-emul)
  67 vmlinux-32              = vmlinux
  68 vmlinux-64              = vmlinux.64
  69
  70 cflags-y                += -mabi=32
  71 endif
  72
  73 ifdef CONFIG_64BIT
  74 ld-emul                 = $(64bit-emul)
  75 vmlinux-32              = vmlinux.32
  76 vmlinux-64              = vmlinux
  77
  78 cflags-y                += -mabi=64
  79 endif
  80
  81 all-$(CONFIG_BOOT_ELF32)        := $(vmlinux-32)
  82 all-$(CONFIG_BOOT_ELF64)        := $(vmlinux-64)
  83 all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
  84
  85 #
  86 # GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
  87 # code since it only slows down the whole thing.  At some point we might make
  88 # use of global pointer optimizations but their use of $28 conflicts with
  89 # the current pointer optimization.
  90 #
  91 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
  92 # machines may also.  Since BFD is incredibly buggy with respect to
  93 # crossformat linking we rely on the elf2ecoff tool for format conversion.
  94 #
  95 cflags-y                        += -G 0 -mno-abicalls -fno-pic -pipe
  96 cflags-y                        += -msoft-float
  97 LDFLAGS_vmlinux                 += -G 0 -static -n -nostdlib
  98 KBUILD_AFLAGS_MODULE            += -mlong-calls
  99 KBUILD_CFLAGS_MODULE            += -mlong-calls
 100
 101 ifeq ($(CONFIG_RELOCATABLE),y)
 102 LDFLAGS_vmlinux                 += --emit-relocs
 103 endif
 104
 105 #
 106 # pass -msoft-float to GAS if it supports it.  However on newer binutils
 107 # (specifically newer than 2.24.51.20140728) we then also need to explicitly
 108 # set ".set hardfloat" in all files which manipulate floating point registers.
 109 #
 110 ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
 111         cflags-y                += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
 112 endif
 113
 114 cflags-y += -ffreestanding
 115
 116 #
 117 # We explicitly add the endianness specifier if needed, this allows
 118 # to compile kernels with a toolchain for the other endianness. We
 119 # carefully avoid to add it redundantly because gcc 3.3/3.4 complains
 120 # when fed the toolchain default!
 121 #
 122 # Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
 123 # 2006-10-10 don't properly change the predefined symbols if -EB / -EL
 124 # are used, so we kludge that here.  A bug has been filed at
 125 # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
 126 #
 127 # clang doesn't suffer from these issues and our checks against -dumpmachine
 128 # don't work so well when cross compiling, since without providing --target
 129 # clang's output will be based upon the build machine. So for clang we simply
 130 # unconditionally specify -EB or -EL as appropriate.
 131 #
 132 ifdef CONFIG_CC_IS_CLANG
 133 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -EB
 134 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -EL
 135 else
 136 undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
 137 undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
 138 predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
 139 predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
 140 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
 141 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
 142 endif
 143
 144 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
 145                                    -fno-omit-frame-pointer
 146
 147 # Some distribution-specific toolchains might pass the -fstack-check
 148 # option during the build, which adds a simple stack-probe at the beginning
 149 # of every function.  This stack probe is to ensure that there is enough
 150 # stack space, else a SEGV is generated.  This is not desirable for MIPS
 151 # as kernel stacks are small, placed in unmapped virtual memory, and do not
 152 # grow when overflowed.  Especially on SGI IP27 platforms, this check will
 153 # lead to a NULL pointer dereference in _raw_spin_lock_irq.
 154 #
 155 # In disassembly, this stack probe appears at the top of a function as:
 156 #    sd         zero,<offset>(sp)
 157 # Where <offset> is a negative value.
 158 #
 159 cflags-y += -fno-stack-check
 160
 161 #
 162 # CPU-dependent compiler/assembler options for optimization.
 163 #
 164 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
 165 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
 166 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
 167 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
 168 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
 169 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
 170 cflags-$(CONFIG_CPU_MIPS32_R1)  += -march=mips32 -Wa,--trap
 171 cflags-$(CONFIG_CPU_MIPS32_R2)  += -march=mips32r2 -Wa,--trap
 172 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap -modd-spreg
 173 cflags-$(CONFIG_CPU_MIPS64_R1)  += -march=mips64 -Wa,--trap
 174 cflags-$(CONFIG_CPU_MIPS64_R2)  += -march=mips64r2 -Wa,--trap
 175 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
 176 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
 177 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
 178                         -Wa,--trap
 179 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
 180                         -Wa,--trap
 181 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
 182                         -Wa,--trap
 183 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
 184                         -Wa,--trap
 185 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
 186                         -Wa,--trap
 187 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
 188 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
 189 cflags-$(CONFIG_CPU_R8000)      += -march=r8000 -Wa,--trap
 190 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
 191                         -Wa,--trap
 192 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
 193 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
 194 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 195 endif
 196 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 197 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
 198
 199 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
 200 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 201 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
 202
 203 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
 204 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
 205 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
 206 # similar directives in the kernel will spam the build logs with the following warnings:
 207 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
 208 # or
 209 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
 210 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
 211 # been fixed properly.
 212 mips-cflags                             := $(cflags-y)
 213 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
 214 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
 215 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
 216 endif
 217 ifeq ($(CONFIG_CPU_MICROMIPS),y)
 218 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
 219 cflags-$(micromips-ase)                 += -mmicromips
 220 endif
 221 ifeq ($(CONFIG_CPU_HAS_MSA),y)
 222 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
 223 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
 224 endif
 225 toolchain-virt                          := $(call cc-option-yn,$(mips-cflags) -mvirt)
 226 cflags-$(toolchain-virt)                += -DTOOLCHAIN_SUPPORTS_VIRT
 227 # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
 228 # only warns
 229 xpa-cflags-y                            := $(mips-cflags)
 230 xpa-cflags-$(micromips-ase)             += -mmicromips -Wa$(comma)-fatal-warnings
 231 toolchain-xpa                           := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
 232 cflags-$(toolchain-xpa)                 += -DTOOLCHAIN_SUPPORTS_XPA
 233 toolchain-crc                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
 234 cflags-$(toolchain-crc)                 += -DTOOLCHAIN_SUPPORTS_CRC
 235 toolchain-dsp                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
 236 cflags-$(toolchain-dsp)                 += -DTOOLCHAIN_SUPPORTS_DSP
 237 toolchain-ginv                          := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
 238 cflags-$(toolchain-ginv)                += -DTOOLCHAIN_SUPPORTS_GINV
 239
 240 #
 241 # Firmware support
 242 #
 243 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
 244 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
 245 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
 246 libs-y                          += arch/mips/fw/lib/
 247
 248 #
 249 # Kernel compression
 250 #
 251 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 252 COMPRESSION_FNAME               = vmlinuz
 253 else
 254 COMPRESSION_FNAME               = vmlinux
 255 endif
 256
 257 #
 258 # Board-dependent options and extra files
 259 #
 260 include arch/mips/Kbuild.platforms
 261
 262 ifdef CONFIG_PHYSICAL_START
 263 load-y                                  = $(CONFIG_PHYSICAL_START)
 264 endif
 265
 266 entry-y                         = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
 267 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
 268 drivers-$(CONFIG_PCI)           += arch/mips/pci/
 269
 270 #
 271 # Automatically detect the build format. By default we choose
 272 # the elf format according to the load address.
 273 # We can always force a build with a 64-bits symbol format by
 274 # passing 'KBUILD_SYM32=no' option to the make's command line.
 275 #
 276 ifdef CONFIG_64BIT
 277   ifndef KBUILD_SYM32
 278     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
 279       KBUILD_SYM32 = y
 280     endif
 281   endif
 282
 283   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
 284     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
 285   else
 286     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
 287       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
 288     endif
 289   endif
 290 endif
 291
 292 KBUILD_AFLAGS   += $(cflags-y)
 293 KBUILD_CFLAGS   += $(cflags-y)
 294 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
 295 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 296
 297 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
 298                   VMLINUX_ENTRY_ADDRESS=$(entry-y) \
 299                   PLATFORM="$(platform-y)" \
 300                   ITS_INPUTS="$(its-y)"
 301 ifdef CONFIG_32BIT
 302 bootvars-y      += ADDR_BITS=32
 303 endif
 304 ifdef CONFIG_64BIT
 305 bootvars-y      += ADDR_BITS=64
 306 endif
 307
 308 # This is required to get dwarf unwinding tables into .debug_frame
 309 # instead of .eh_frame so we don't discard them.
 310 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 311
 312 KBUILD_LDFLAGS          += -m $(ld-emul)
 313
 314 ifdef CONFIG_MIPS
 315 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 316         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
 317         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
 318 endif
 319
 320 OBJCOPYFLAGS            += --remove-section=.reginfo
 321
 322 head-y := arch/mips/kernel/head.o
 323
 324 libs-y                  += arch/mips/lib/
 325 libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
 326
 327 # See arch/mips/Kbuild for content of core part of the kernel
 328 core-y += arch/mips/
 329
 330 drivers-$(CONFIG_MIPS_CRC_SUPPORT) += arch/mips/crypto/
 331 drivers-$(CONFIG_OPROFILE)      += arch/mips/oprofile/
 332
 333 # suspend and hibernation support
 334 drivers-$(CONFIG_PM)    += arch/mips/power/
 335
 336 # boot image targets (arch/mips/boot/)
 337 boot-y                  := vmlinux.bin
 338 boot-y                  += vmlinux.ecoff
 339 boot-y                  += vmlinux.srec
 340 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 341 boot-y                  += uImage
 342 boot-y                  += uImage.bin
 343 boot-y                  += uImage.bz2
 344 boot-y                  += uImage.gz
 345 boot-y                  += uImage.lzma
 346 boot-y                  += uImage.lzo
 347 endif
 348 boot-y                  += vmlinux.itb
 349 boot-y                  += vmlinux.gz.itb
 350 boot-y                  += vmlinux.bz2.itb
 351 boot-y                  += vmlinux.lzma.itb
 352 boot-y                  += vmlinux.lzo.itb
 353
 354 # compressed boot image targets (arch/mips/boot/compressed/)
 355 bootz-y                 := vmlinuz
 356 bootz-y                 += vmlinuz.bin
 357 bootz-y                 += vmlinuz.ecoff
 358 bootz-y                 += vmlinuz.srec
 359 ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
 360 bootz-y                 += uzImage.bin
 361 endif
 362
 363 ifdef CONFIG_LASAT
 364 rom.bin rom.sw: vmlinux
 365         $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
 366                 $(bootvars-y) $@
 367 endif
 368
 369 #
 370 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
 371 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
 372 # convert to ECOFF using elf2ecoff.
 373 #
 374 quiet_cmd_32 = OBJCOPY $@
 375         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
 376 vmlinux.32: vmlinux
 377         $(call cmd,32)
 378
 379 #
 380 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
 381 # ELF files from 32-bit files by conversion.
 382 #
 383 quiet_cmd_64 = OBJCOPY $@
 384         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
 385 vmlinux.64: vmlinux
 386         $(call cmd,64)
 387
 388 all:    $(all-y) $(KBUILD_DTBS)
 389
 390 # boot
 391 $(boot-y): $(vmlinux-32) FORCE
 392         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
 393                 $(bootvars-y) arch/mips/boot/$@
 394
 395 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 396 # boot/compressed
 397 $(bootz-y): $(vmlinux-32) FORCE
 398         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
 399                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
 400 else
 401 vmlinuz: FORCE
 402         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
 403         /bin/false
 404 endif
 405
 406
 407 CLEAN_FILES += vmlinux.32 vmlinux.64
 408
 409 # device-trees
 410 core-y += arch/mips/boot/dts/
 411
 412 archprepare:
 413 ifdef CONFIG_MIPS32_N32
 414         @$(kecho) '  Checking missing-syscalls for N32'
 415         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
 416 endif
 417 ifdef CONFIG_MIPS32_O32
 418         @$(kecho) '  Checking missing-syscalls for O32'
 419         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
 420 endif
 421
 422 install:
 423         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
 424 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 425         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
 426 endif
 427         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
 428         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
 429
 430 archclean:
 431         $(Q)$(MAKE) $(clean)=arch/mips/boot
 432         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
 433         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
 434         $(Q)$(MAKE) $(clean)=arch/mips/lasat
 435
 436 archheaders:
 437         $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
 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
 457         echo '  These will be default as appropriate for a configured platform.'
 458         echo
 459         echo '  If you are targeting a system supported by generic kernels you may'
 460         echo '  configure the kernel for a given architecture target like so:'
 461         echo
 462         echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
 463         echo
 464         echo '  Where BOARDS is some subset of the following:'
 465         for board in $(sort $(BOARDS)); do echo "    $${board}"; done
 466         echo
 467         echo '  Specifically the following generic default configurations are'
 468         echo '  supported:'
 469         echo
 470         $(foreach cfg,$(generic_defconfigs),
 471           printf "  %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
 472         echo
 473         echo '  The following legacy default configurations have been converted to'
 474         echo '  generic and can still be used:'
 475         echo
 476         $(foreach cfg,$(sort $(legacy_defconfigs)),
 477           printf "  %-24s - Build $($(cfg)-y)\n" $(cfg);)
 478         echo
 479         echo '  Otherwise, the following default configurations are available:'
 480 endef
 481
 482 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
 483 generic_defconfigs :=
 484
 485 #
 486 # If the user generates a generic kernel configuration without specifying a
 487 # list of boards to include the config fragments for, default to including all
 488 # available board config fragments.
 489 #
 490 ifeq ($(BOARDS),)
 491 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
 492 endif
 493
 494 #
 495 # Generic kernel configurations which merge generic_defconfig with the
 496 # appropriate config fragments from arch/mips/configs/generic/, resulting in
 497 # the ability to easily configure the kernel for a given architecture,
 498 # endianness & set of boards without duplicating the needed configuration in
 499 # hundreds of defconfig files.
 500 #
 501 define gen_generic_defconfigs
 502 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
 503 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
 504 generic_defconfigs += $$(target)
 505 $$(target): $(generic_config_dir)/$(bits)$(rev).config
 506 $$(target): $(generic_config_dir)/$(endian).config
 507 )))
 508 endef
 509
 510 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
 511 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
 512
 513 define describe_generic_defconfig
 514 $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
 515 endef
 516
 517 .PHONY: $(generic_defconfigs)
 518 $(generic_defconfigs):
 519         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 520                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
 521                 grep -Ev '^#'
 522         $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
 523         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
 524                 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
 525         $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
 526                 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
 527                 "$(origin BOARDS)" $(BOARDS)
 528         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 529
 530 #
 531 # Prevent generic merge_config rules attempting to merge single fragments
 532 #
 533 $(generic_config_dir)/%.config: ;
 534
 535 #
 536 # Prevent direct use of generic_defconfig, which is intended to be used as the
 537 # basis of the various ISA-specific targets generated above.
 538 #
 539 .PHONY: generic_defconfig
 540 generic_defconfig:
 541         $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
 542         $(Q)echo "used via an ISA-specific target from the following list:"
 543         $(Q)echo
 544         $(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
 545         $(Q)echo
 546         $(Q)false
 547
 548 #
 549 # Legacy defconfig compatibility - these targets used to be real defconfigs but
 550 # now that the boards have been converted to use the generic kernel they are
 551 # wrappers around the generic rules above.
 552 #
 553 legacy_defconfigs               += ocelot_defconfig
 554 ocelot_defconfig-y              := 32r2el_defconfig BOARDS=ocelot
 555
 556 legacy_defconfigs               += sead3_defconfig
 557 sead3_defconfig-y               := 32r2el_defconfig BOARDS=sead-3
 558
 559 legacy_defconfigs               += sead3micro_defconfig
 560 sead3micro_defconfig-y          := micro32r2el_defconfig BOARDS=sead-3
 561
 562 legacy_defconfigs               += xilfpga_defconfig
 563 xilfpga_defconfig-y             := 32r2el_defconfig BOARDS=xilfpga
 564
 565 .PHONY: $(legacy_defconfigs)
 566 $(legacy_defconfigs):
 567         $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)