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)  += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
 159                         -Wa,-mips32 -Wa,--trap
 160 cflags-$(CONFIG_CPU_MIPS32_R2)  += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
 161                         -Wa,-mips32r2 -Wa,--trap
 162 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap -modd-spreg
 163 cflags-$(CONFIG_CPU_MIPS64_R1)  += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 164                         -Wa,-mips64 -Wa,--trap
 165 cflags-$(CONFIG_CPU_MIPS64_R2)  += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
 166                         -Wa,-mips64r2 -Wa,--trap
 167 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
 168 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
 169 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
 170                         -Wa,--trap
 171 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
 172                         -Wa,--trap
 173 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
 174                         -Wa,--trap
 175 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
 176                         -Wa,--trap
 177 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
 178                         -Wa,--trap
 179 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
 180 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
 181 cflags-$(CONFIG_CPU_R8000)      += -march=r8000 -Wa,--trap
 182 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
 183                         -Wa,--trap
 184 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
 185 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
 186 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
 187 endif
 188 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
 189 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
 190
 191 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
 192 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 193 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
 194
 195 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
 196 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
 197 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
 198 # similar directives in the kernel will spam the build logs with the following warnings:
 199 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
 200 # or
 201 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
 202 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
 203 # been fixed properly.
 204 mips-cflags                             := $(cflags-y)
 205 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
 206 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
 207 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
 208 endif
 209 ifeq ($(CONFIG_CPU_MICROMIPS),y)
 210 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
 211 cflags-$(micromips-ase)                 += -mmicromips
 212 endif
 213 ifeq ($(CONFIG_CPU_HAS_MSA),y)
 214 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
 215 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
 216 endif
 217 toolchain-virt                          := $(call cc-option-yn,$(mips-cflags) -mvirt)
 218 cflags-$(toolchain-virt)                += -DTOOLCHAIN_SUPPORTS_VIRT
 219
 220 #
 221 # Firmware support
 222 #
 223 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
 224 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
 225 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
 226 libs-y                          += arch/mips/fw/lib/
 227
 228 #
 229 # Kernel compression
 230 #
 231 ifdef SYS_SUPPORTS_ZBOOT
 232 COMPRESSION_FNAME               = vmlinuz
 233 else
 234 COMPRESSION_FNAME               = vmlinux
 235 endif
 236
 237 #
 238 # Board-dependent options and extra files
 239 #
 240 include arch/mips/Kbuild.platforms
 241
 242 ifdef CONFIG_PHYSICAL_START
 243 load-y                                  = $(CONFIG_PHYSICAL_START)
 244 endif
 245
 246 entry-noisa-y                           = 0x$(shell $(NM) vmlinux 2>/dev/null \
 247                                         | grep "\bkernel_entry\b" | cut -f1 -d \ )
 248 ifdef CONFIG_CPU_MICROMIPS
 249   #
 250   # Set the ISA bit, since the kernel_entry symbol in the ELF will have it
 251   # clear which would lead to images containing addresses which bootloaders may
 252   # jump to as MIPS32 code.
 253   #
 254   entry-y = $(patsubst %0,%1,$(patsubst %2,%3,$(patsubst %4,%5, \
 255               $(patsubst %6,%7,$(patsubst %8,%9,$(patsubst %a,%b, \
 256               $(patsubst %c,%d,$(patsubst %e,%f,$(entry-noisa-y)))))))))
 257 else
 258   entry-y = $(entry-noisa-y)
 259 endif
 260
 261 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
 262 drivers-$(CONFIG_PCI)           += arch/mips/pci/
 263
 264 #
 265 # Automatically detect the build format. By default we choose
 266 # the elf format according to the load address.
 267 # We can always force a build with a 64-bits symbol format by
 268 # passing 'KBUILD_SYM32=no' option to the make's command line.
 269 #
 270 ifdef CONFIG_64BIT
 271   ifndef KBUILD_SYM32
 272     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
 273       KBUILD_SYM32 = y
 274     endif
 275   endif
 276
 277   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
 278     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
 279   else
 280     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
 281       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
 282     endif
 283   endif
 284 endif
 285
 286 KBUILD_AFLAGS   += $(cflags-y)
 287 KBUILD_CFLAGS   += $(cflags-y)
 288 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
 289 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
 290
 291 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
 292                   VMLINUX_ENTRY_ADDRESS=$(entry-y) \
 293                   PLATFORM="$(platform-y)" \
 294                   ITS_INPUTS="$(its-y)"
 295 ifdef CONFIG_32BIT
 296 bootvars-y      += ADDR_BITS=32
 297 endif
 298 ifdef CONFIG_64BIT
 299 bootvars-y      += ADDR_BITS=64
 300 endif
 301
 302 # This is required to get dwarf unwinding tables into .debug_frame
 303 # instead of .eh_frame so we don't discard them.
 304 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 305
 306 LDFLAGS                 += -m $(ld-emul)
 307
 308 ifdef CONFIG_MIPS
 309 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
 310         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
 311         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
 312 ifdef CONFIG_64BIT
 313 CHECKFLAGS              += -m64
 314 endif
 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_OPROFILE)      += arch/mips/oprofile/
 328
 329 # suspend and hibernation support
 330 drivers-$(CONFIG_PM)    += arch/mips/power/
 331
 332 # boot image targets (arch/mips/boot/)
 333 boot-y                  := vmlinux.bin
 334 boot-y                  += vmlinux.ecoff
 335 boot-y                  += vmlinux.srec
 336 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
 337 boot-y                  += uImage
 338 boot-y                  += uImage.bin
 339 boot-y                  += uImage.bz2
 340 boot-y                  += uImage.gz
 341 boot-y                  += uImage.lzma
 342 boot-y                  += uImage.lzo
 343 endif
 344 boot-y                  += vmlinux.itb
 345 boot-y                  += vmlinux.gz.itb
 346 boot-y                  += vmlinux.bz2.itb
 347 boot-y                  += vmlinux.lzma.itb
 348 boot-y                  += vmlinux.lzo.itb
 349
 350 # compressed boot image targets (arch/mips/boot/compressed/)
 351 bootz-y                 := vmlinuz
 352 bootz-y                 += vmlinuz.bin
 353 bootz-y                 += vmlinuz.ecoff
 354 bootz-y                 += vmlinuz.srec
 355 ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
 356 bootz-y                 += uzImage.bin
 357 endif
 358
 359 ifdef CONFIG_LASAT
 360 rom.bin rom.sw: vmlinux
 361         $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
 362                 $(bootvars-y) $@
 363 endif
 364
 365 #
 366 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
 367 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
 368 # convert to ECOFF using elf2ecoff.
 369 #
 370 quiet_cmd_32 = OBJCOPY $@
 371         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
 372 vmlinux.32: vmlinux
 373         $(call cmd,32)
 374
 375 #
 376 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
 377 # ELF files from 32-bit files by conversion.
 378 #
 379 quiet_cmd_64 = OBJCOPY $@
 380         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
 381 vmlinux.64: vmlinux
 382         $(call cmd,64)
 383
 384 all:    $(all-y)
 385
 386 # boot
 387 $(boot-y): $(vmlinux-32) FORCE
 388         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
 389                 $(bootvars-y) arch/mips/boot/$@
 390
 391 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 392 # boot/compressed
 393 $(bootz-y): $(vmlinux-32) FORCE
 394         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
 395                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
 396 else
 397 vmlinuz: FORCE
 398         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
 399         /bin/false
 400 endif
 401
 402
 403 CLEAN_FILES += vmlinux.32 vmlinux.64
 404
 405 # device-trees
 406 core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
 407
 408 %.dtb %.dtb.S %.dtb.o: | scripts
 409         $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
 410
 411 PHONY += dtbs
 412 dtbs: scripts
 413         $(Q)$(MAKE) $(build)=arch/mips/boot/dts
 414
 415 PHONY += dtbs_install
 416 dtbs_install:
 417         $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
 418
 419 archprepare:
 420 ifdef CONFIG_MIPS32_N32
 421         @$(kecho) '  Checking missing-syscalls for N32'
 422         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
 423 endif
 424 ifdef CONFIG_MIPS32_O32
 425         @$(kecho) '  Checking missing-syscalls for O32'
 426         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
 427 endif
 428
 429 install:
 430         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
 431 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
 432         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
 433 endif
 434         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
 435         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
 436
 437 archclean:
 438         $(Q)$(MAKE) $(clean)=arch/mips/boot
 439         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
 440         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
 441         $(Q)$(MAKE) $(clean)=arch/mips/lasat
 442
 443 define archhelp
 444         echo '  install              - install kernel into $(INSTALL_PATH)'
 445         echo '  vmlinux.ecoff        - ECOFF boot image'
 446         echo '  vmlinux.bin          - Raw binary boot image'
 447         echo '  vmlinux.srec         - SREC boot image'
 448         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
 449         echo '  vmlinuz              - Compressed boot(zboot) image'
 450         echo '  vmlinuz.ecoff        - ECOFF zboot image'
 451         echo '  vmlinuz.bin          - Raw binary zboot image'
 452         echo '  vmlinuz.srec         - SREC zboot image'
 453         echo '  uImage               - U-Boot image'
 454         echo '  uImage.bin           - U-Boot image (uncompressed)'
 455         echo '  uImage.bz2           - U-Boot image (bz2)'
 456         echo '  uImage.gz            - U-Boot image (gzip)'
 457         echo '  uImage.lzma          - U-Boot image (lzma)'
 458         echo '  uImage.lzo           - U-Boot image (lzo)'
 459         echo '  uzImage.bin          - U-Boot image (self-extracting)'
 460         echo '  dtbs                 - Device-tree blobs for enabled boards'
 461         echo '  dtbs_install         - Install dtbs to $(INSTALL_DTBS_PATH)'
 462         echo
 463         echo '  These will be default as appropriate for a configured platform.'
 464         echo
 465         echo '  If you are targeting a system supported by generic kernels you may'
 466         echo '  configure the kernel for a given architecture target like so:'
 467         echo
 468         echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
 469         echo
 470         echo '  Otherwise, the following default configurations are available:'
 471 endef
 472
 473 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
 474 generic_defconfigs :=
 475
 476 #
 477 # If the user generates a generic kernel configuration without specifying a
 478 # list of boards to include the config fragments for, default to including all
 479 # available board config fragments.
 480 #
 481 ifeq ($(BOARDS),)
 482 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
 483 endif
 484
 485 #
 486 # Generic kernel configurations which merge generic_defconfig with the
 487 # appropriate config fragments from arch/mips/configs/generic/, resulting in
 488 # the ability to easily configure the kernel for a given architecture,
 489 # endianness & set of boards without duplicating the needed configuration in
 490 # hundreds of defconfig files.
 491 #
 492 define gen_generic_defconfigs
 493 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
 494 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
 495 generic_defconfigs += $$(target)
 496 $$(target): $(generic_config_dir)/$(bits)$(rev).config
 497 $$(target): $(generic_config_dir)/$(endian).config
 498 )))
 499 endef
 500
 501 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
 502 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
 503
 504 .PHONY: $(generic_defconfigs)
 505 $(generic_defconfigs):
 506         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 507                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
 508                 grep -Ev '^#'
 509         $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
 510         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
 511                 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
 512         $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
 513                 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
 514                 "$(origin BOARDS)" $(BOARDS)
 515         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 516
 517 #
 518 # Prevent generic merge_config rules attempting to merge single fragments
 519 #
 520 $(generic_config_dir)/%.config: ;
 521
 522 #
 523 # Prevent direct use of generic_defconfig, which is intended to be used as the
 524 # basis of the various ISA-specific targets generated above.
 525 #
 526 .PHONY: generic_defconfig
 527 generic_defconfig:
 528         $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
 529         $(Q)echo "used via an ISA-specific target from the following list:"
 530         $(Q)echo
 531         $(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
 532         $(Q)echo
 533         $(Q)false
 534
 535 #
 536 # Legacy defconfig compatibility - these targets used to be real defconfigs but
 537 # now that the boards have been converted to use the generic kernel they are
 538 # wrappers around the generic rules above.
 539 #
 540 .PHONY: sead3_defconfig
 541 sead3_defconfig:
 542         $(Q)$(MAKE) -f $(srctree)/Makefile 32r2el_defconfig BOARDS=sead-3
 543
 544 .PHONY: sead3micro_defconfig
 545 sead3micro_defconfig:
 546         $(Q)$(MAKE) -f $(srctree)/Makefile micro32r2el_defconfig BOARDS=sead-3