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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_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_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
177                         -Wa,--trap
178 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
179                         -Wa,--trap
180 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
181                         -Wa,--trap
182 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
183                         -Wa,--trap
184 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
185 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
186 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
187                         -Wa,--trap
188 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
189 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
190 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
191 endif
192 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
193 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
194
195 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
196 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
197 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
198
199 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
200 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
201 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
202 # similar directives in the kernel will spam the build logs with the following warnings:
203 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
204 # or
205 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
206 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
207 # been fixed properly.
208 mips-cflags                             := $(cflags-y)
209 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
210 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
211 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
212 endif
213 ifeq ($(CONFIG_CPU_MICROMIPS),y)
214 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
215 cflags-$(micromips-ase)                 += -mmicromips
216 endif
217 ifeq ($(CONFIG_CPU_HAS_MSA),y)
218 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
219 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
220 endif
221 toolchain-virt                          := $(call cc-option-yn,$(mips-cflags) -mvirt)
222 cflags-$(toolchain-virt)                += -DTOOLCHAIN_SUPPORTS_VIRT
223 # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
224 # only warns
225 xpa-cflags-y                            := $(mips-cflags)
226 xpa-cflags-$(micromips-ase)             += -mmicromips -Wa$(comma)-fatal-warnings
227 toolchain-xpa                           := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
228 cflags-$(toolchain-xpa)                 += -DTOOLCHAIN_SUPPORTS_XPA
229 toolchain-crc                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
230 cflags-$(toolchain-crc)                 += -DTOOLCHAIN_SUPPORTS_CRC
231 toolchain-dsp                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
232 cflags-$(toolchain-dsp)                 += -DTOOLCHAIN_SUPPORTS_DSP
233 toolchain-ginv                          := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
234 cflags-$(toolchain-ginv)                += -DTOOLCHAIN_SUPPORTS_GINV
235
236 #
237 # Firmware support
238 #
239 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
240 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
241 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
242 libs-y                          += arch/mips/fw/lib/
243
244 #
245 # Kernel compression
246 #
247 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
248 COMPRESSION_FNAME               = vmlinuz
249 else
250 COMPRESSION_FNAME               = vmlinux
251 endif
252
253 #
254 # Board-dependent options and extra files
255 #
256 include arch/mips/Kbuild.platforms
257
258 ifdef CONFIG_PHYSICAL_START
259 load-y                                  = $(CONFIG_PHYSICAL_START)
260 endif
261
262 entry-y                         = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
263 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
264 drivers-$(CONFIG_PCI)           += arch/mips/pci/
265
266 #
267 # Automatically detect the build format. By default we choose
268 # the elf format according to the load address.
269 # We can always force a build with a 64-bits symbol format by
270 # passing 'KBUILD_SYM32=no' option to the make's command line.
271 #
272 ifdef CONFIG_64BIT
273   ifndef KBUILD_SYM32
274     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
275       KBUILD_SYM32 = y
276     endif
277   endif
278
279   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
280     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
281   else
282     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
283       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
284     endif
285   endif
286 endif
287
288 KBUILD_AFLAGS   += $(cflags-y)
289 KBUILD_CFLAGS   += $(cflags-y)
290 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
291 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
292
293 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
294                   VMLINUX_ENTRY_ADDRESS=$(entry-y) \
295                   PLATFORM="$(platform-y)" \
296                   ITS_INPUTS="$(its-y)"
297 ifdef CONFIG_32BIT
298 bootvars-y      += ADDR_BITS=32
299 endif
300 ifdef CONFIG_64BIT
301 bootvars-y      += ADDR_BITS=64
302 endif
303
304 # This is required to get dwarf unwinding tables into .debug_frame
305 # instead of .eh_frame so we don't discard them.
306 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
307
308 KBUILD_LDFLAGS          += -m $(ld-emul)
309
310 ifdef CONFIG_MIPS
311 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
312         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
313         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
314 endif
315
316 OBJCOPYFLAGS            += --remove-section=.reginfo
317
318 head-y := arch/mips/kernel/head.o
319
320 libs-y                  += arch/mips/lib/
321 libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
322
323 # See arch/mips/Kbuild for content of core part of the kernel
324 core-y += arch/mips/
325
326 drivers-$(CONFIG_MIPS_CRC_SUPPORT) += arch/mips/crypto/
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) $(KBUILD_DTBS)
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-y += arch/mips/boot/dts/
407
408 archprepare:
409 ifdef CONFIG_MIPS32_N32
410         @$(kecho) '  Checking missing-syscalls for N32'
411         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
412 endif
413 ifdef CONFIG_MIPS32_O32
414         @$(kecho) '  Checking missing-syscalls for O32'
415         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
416 endif
417
418 install:
419         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
420 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
421         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
422 endif
423         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
424         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
425
426 archclean:
427         $(Q)$(MAKE) $(clean)=arch/mips/boot
428         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
429         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
430         $(Q)$(MAKE) $(clean)=arch/mips/lasat
431
432 archheaders:
433         $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
434
435 define archhelp
436         echo '  install              - install kernel into $(INSTALL_PATH)'
437         echo '  vmlinux.ecoff        - ECOFF boot image'
438         echo '  vmlinux.bin          - Raw binary boot image'
439         echo '  vmlinux.srec         - SREC boot image'
440         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
441         echo '  vmlinuz              - Compressed boot(zboot) image'
442         echo '  vmlinuz.ecoff        - ECOFF zboot image'
443         echo '  vmlinuz.bin          - Raw binary zboot image'
444         echo '  vmlinuz.srec         - SREC zboot image'
445         echo '  uImage               - U-Boot image'
446         echo '  uImage.bin           - U-Boot image (uncompressed)'
447         echo '  uImage.bz2           - U-Boot image (bz2)'
448         echo '  uImage.gz            - U-Boot image (gzip)'
449         echo '  uImage.lzma          - U-Boot image (lzma)'
450         echo '  uImage.lzo           - U-Boot image (lzo)'
451         echo '  uzImage.bin          - U-Boot image (self-extracting)'
452         echo
453         echo '  These will be default as appropriate for a configured platform.'
454         echo
455         echo '  If you are targeting a system supported by generic kernels you may'
456         echo '  configure the kernel for a given architecture target like so:'
457         echo
458         echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
459         echo
460         echo '  Where BOARDS is some subset of the following:'
461         for board in $(sort $(BOARDS)); do echo "    $${board}"; done
462         echo
463         echo '  Specifically the following generic default configurations are'
464         echo '  supported:'
465         echo
466         $(foreach cfg,$(generic_defconfigs),
467           printf "  %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
468         echo
469         echo '  The following legacy default configurations have been converted to'
470         echo '  generic and can still be used:'
471         echo
472         $(foreach cfg,$(sort $(legacy_defconfigs)),
473           printf "  %-24s - Build $($(cfg)-y)\n" $(cfg);)
474         echo
475         echo '  Otherwise, the following default configurations are available:'
476 endef
477
478 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
479 generic_defconfigs :=
480
481 #
482 # If the user generates a generic kernel configuration without specifying a
483 # list of boards to include the config fragments for, default to including all
484 # available board config fragments.
485 #
486 ifeq ($(BOARDS),)
487 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
488 endif
489
490 #
491 # Generic kernel configurations which merge generic_defconfig with the
492 # appropriate config fragments from arch/mips/configs/generic/, resulting in
493 # the ability to easily configure the kernel for a given architecture,
494 # endianness & set of boards without duplicating the needed configuration in
495 # hundreds of defconfig files.
496 #
497 define gen_generic_defconfigs
498 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
499 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
500 generic_defconfigs += $$(target)
501 $$(target): $(generic_config_dir)/$(bits)$(rev).config
502 $$(target): $(generic_config_dir)/$(endian).config
503 )))
504 endef
505
506 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
507 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
508
509 define describe_generic_defconfig
510 $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
511 endef
512
513 .PHONY: $(generic_defconfigs)
514 $(generic_defconfigs):
515         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
516                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
517                 grep -Ev '^#'
518         $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
519         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
520                 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
521         $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
522                 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
523                 "$(origin BOARDS)" $(BOARDS)
524         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
525
526 #
527 # Prevent generic merge_config rules attempting to merge single fragments
528 #
529 $(generic_config_dir)/%.config: ;
530
531 #
532 # Prevent direct use of generic_defconfig, which is intended to be used as the
533 # basis of the various ISA-specific targets generated above.
534 #
535 .PHONY: generic_defconfig
536 generic_defconfig:
537         $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
538         $(Q)echo "used via an ISA-specific target from the following list:"
539         $(Q)echo
540         $(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
541         $(Q)echo
542         $(Q)false
543
544 #
545 # Legacy defconfig compatibility - these targets used to be real defconfigs but
546 # now that the boards have been converted to use the generic kernel they are
547 # wrappers around the generic rules above.
548 #
549 legacy_defconfigs               += ocelot_defconfig
550 ocelot_defconfig-y              := 32r2el_defconfig BOARDS=ocelot
551
552 legacy_defconfigs               += sead3_defconfig
553 sead3_defconfig-y               := 32r2el_defconfig BOARDS=sead-3
554
555 legacy_defconfigs               += sead3micro_defconfig
556 sead3micro_defconfig-y          := micro32r2el_defconfig BOARDS=sead-3
557
558 legacy_defconfigs               += xilfpga_defconfig
559 xilfpga_defconfig-y             := 32r2el_defconfig BOARDS=xilfpga
560
561 .PHONY: $(legacy_defconfigs)
562 $(legacy_defconfigs):
563         $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)