Merge branches 'work.misc' and 'work.dcache' of git://git.kernel.org/pub/scm/linux...
[sfrench/cifs-2.6.git] / 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 := 32r2el_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 # clang doesn't suffer from these issues and our checks against -dumpmachine
126 # don't work so well when cross compiling, since without providing --target
127 # clang's output will be based upon the build machine. So for clang we simply
128 # unconditionally specify -EB or -EL as appropriate.
129 #
130 ifeq ($(cc-name),clang)
131 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -EB
132 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -EL
133 else
134 undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
135 undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
136 predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
137 predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
138 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
139 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
140 endif
141
142 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
143                                    -fno-omit-frame-pointer
144
145 # Some distribution-specific toolchains might pass the -fstack-check
146 # option during the build, which adds a simple stack-probe at the beginning
147 # of every function.  This stack probe is to ensure that there is enough
148 # stack space, else a SEGV is generated.  This is not desirable for MIPS
149 # as kernel stacks are small, placed in unmapped virtual memory, and do not
150 # grow when overflowed.  Especially on SGI IP27 platforms, this check will
151 # lead to a NULL pointer dereference in _raw_spin_lock_irq.
152 #
153 # In disassembly, this stack probe appears at the top of a function as:
154 #    sd         zero,<offset>(sp)
155 # Where <offset> is a negative value.
156 #
157 cflags-y += -fno-stack-check
158
159 #
160 # CPU-dependent compiler/assembler options for optimization.
161 #
162 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
163 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
164 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
165 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
166 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
167 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
168 cflags-$(CONFIG_CPU_MIPS32_R1)  += -march=mips32 -Wa,--trap
169 cflags-$(CONFIG_CPU_MIPS32_R2)  += -march=mips32r2 -Wa,--trap
170 cflags-$(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-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
174 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
175 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
176                         -Wa,--trap
177 cflags-$(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_R8000)      += -march=r8000 -Wa,--trap
188 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
189                         -Wa,--trap
190 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
191 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
192 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
193 endif
194 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
195 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
196
197 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
198 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
199 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
200
201 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
202 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
203 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
204 # similar directives in the kernel will spam the build logs with the following warnings:
205 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
206 # or
207 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
208 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
209 # been fixed properly.
210 mips-cflags                             := $(cflags-y)
211 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
212 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
213 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
214 endif
215 ifeq ($(CONFIG_CPU_MICROMIPS),y)
216 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
217 cflags-$(micromips-ase)                 += -mmicromips
218 endif
219 ifeq ($(CONFIG_CPU_HAS_MSA),y)
220 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
221 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
222 endif
223 toolchain-virt                          := $(call cc-option-yn,$(mips-cflags) -mvirt)
224 cflags-$(toolchain-virt)                += -DTOOLCHAIN_SUPPORTS_VIRT
225 # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
226 # only warns
227 xpa-cflags-y                            := $(mips-cflags)
228 xpa-cflags-$(micromips-ase)             += -mmicromips -Wa$(comma)-fatal-warnings
229 toolchain-xpa                           := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
230 cflags-$(toolchain-xpa)                 += -DTOOLCHAIN_SUPPORTS_XPA
231 toolchain-crc                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
232 cflags-$(toolchain-crc)                 += -DTOOLCHAIN_SUPPORTS_CRC
233
234 #
235 # Firmware support
236 #
237 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
238 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
239 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
240 libs-y                          += arch/mips/fw/lib/
241
242 #
243 # Kernel compression
244 #
245 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
246 COMPRESSION_FNAME               = vmlinuz
247 else
248 COMPRESSION_FNAME               = vmlinux
249 endif
250
251 #
252 # Board-dependent options and extra files
253 #
254 include arch/mips/Kbuild.platforms
255
256 ifdef CONFIG_PHYSICAL_START
257 load-y                                  = $(CONFIG_PHYSICAL_START)
258 endif
259
260 # Sign-extend the entry point to 64 bits if retrieved as a 32-bit number.
261 entry-y         = $(shell $(OBJDUMP) -f vmlinux 2>/dev/null \
262                         | sed -n '/^start address / { \
263                                 s/^.* //; \
264                                 s/0x\([0-7].......\)$$/0x00000000\1/; \
265                                 s/0x\(........\)$$/0xffffffff\1/; p }')
266
267 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
268 drivers-$(CONFIG_PCI)           += arch/mips/pci/
269
270 #
271 # Automatically detect the build format. By default we choose
272 # the elf format according to the load address.
273 # We can always force a build with a 64-bits symbol format by
274 # passing 'KBUILD_SYM32=no' option to the make's command line.
275 #
276 ifdef CONFIG_64BIT
277   ifndef KBUILD_SYM32
278     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
279       KBUILD_SYM32 = y
280     endif
281   endif
282
283   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
284     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
285   else
286     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
287       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
288     endif
289   endif
290 endif
291
292 KBUILD_AFLAGS   += $(cflags-y)
293 KBUILD_CFLAGS   += $(cflags-y)
294 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
295 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
296
297 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
298                   VMLINUX_ENTRY_ADDRESS=$(entry-y) \
299                   PLATFORM="$(platform-y)" \
300                   ITS_INPUTS="$(its-y)"
301 ifdef CONFIG_32BIT
302 bootvars-y      += ADDR_BITS=32
303 endif
304 ifdef CONFIG_64BIT
305 bootvars-y      += ADDR_BITS=64
306 endif
307
308 # This is required to get dwarf unwinding tables into .debug_frame
309 # instead of .eh_frame so we don't discard them.
310 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
311
312 LDFLAGS                 += -m $(ld-emul)
313
314 ifdef CONFIG_MIPS
315 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
316         egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
317         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -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-y                  += 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)
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) $@
400 else
401 vmlinuz: FORCE
402         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
403         /bin/false
404 endif
405
406
407 CLEAN_FILES += vmlinux.32 vmlinux.64
408
409 # device-trees
410 core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
411
412 %.dtb %.dtb.S %.dtb.o: | scripts
413         $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
414
415 PHONY += dtbs
416 dtbs: scripts
417         $(Q)$(MAKE) $(build)=arch/mips/boot/dts
418
419 PHONY += dtbs_install
420 dtbs_install:
421         $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
422
423 archprepare:
424 ifdef CONFIG_MIPS32_N32
425         @$(kecho) '  Checking missing-syscalls for N32'
426         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
427 endif
428 ifdef CONFIG_MIPS32_O32
429         @$(kecho) '  Checking missing-syscalls for O32'
430         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
431 endif
432
433 install:
434         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
435 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
436         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
437 endif
438         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
439         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
440
441 archclean:
442         $(Q)$(MAKE) $(clean)=arch/mips/boot
443         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
444         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
445         $(Q)$(MAKE) $(clean)=arch/mips/lasat
446
447 define archhelp
448         echo '  install              - install kernel into $(INSTALL_PATH)'
449         echo '  vmlinux.ecoff        - ECOFF boot image'
450         echo '  vmlinux.bin          - Raw binary boot image'
451         echo '  vmlinux.srec         - SREC boot image'
452         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
453         echo '  vmlinuz              - Compressed boot(zboot) image'
454         echo '  vmlinuz.ecoff        - ECOFF zboot image'
455         echo '  vmlinuz.bin          - Raw binary zboot image'
456         echo '  vmlinuz.srec         - SREC zboot image'
457         echo '  uImage               - U-Boot image'
458         echo '  uImage.bin           - U-Boot image (uncompressed)'
459         echo '  uImage.bz2           - U-Boot image (bz2)'
460         echo '  uImage.gz            - U-Boot image (gzip)'
461         echo '  uImage.lzma          - U-Boot image (lzma)'
462         echo '  uImage.lzo           - U-Boot image (lzo)'
463         echo '  uzImage.bin          - U-Boot image (self-extracting)'
464         echo '  dtbs                 - Device-tree blobs for enabled boards'
465         echo '  dtbs_install         - Install dtbs to $(INSTALL_DTBS_PATH)'
466         echo
467         echo '  These will be default as appropriate for a configured platform.'
468         echo
469         echo '  If you are targeting a system supported by generic kernels you may'
470         echo '  configure the kernel for a given architecture target like so:'
471         echo
472         echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
473         echo
474         echo '  Where BOARDS is some subset of the following:'
475         for board in $(sort $(BOARDS)); do echo "    $${board}"; done
476         echo
477         echo '  Specifically the following generic default configurations are'
478         echo '  supported:'
479         echo
480         $(foreach cfg,$(generic_defconfigs),
481           printf "  %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
482         echo
483         echo '  The following legacy default configurations have been converted to'
484         echo '  generic and can still be used:'
485         echo
486         $(foreach cfg,$(sort $(legacy_defconfigs)),
487           printf "  %-24s - Build $($(cfg)-y)\n" $(cfg);)
488         echo
489         echo '  Otherwise, the following default configurations are available:'
490 endef
491
492 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
493 generic_defconfigs :=
494
495 #
496 # If the user generates a generic kernel configuration without specifying a
497 # list of boards to include the config fragments for, default to including all
498 # available board config fragments.
499 #
500 ifeq ($(BOARDS),)
501 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
502 endif
503
504 #
505 # Generic kernel configurations which merge generic_defconfig with the
506 # appropriate config fragments from arch/mips/configs/generic/, resulting in
507 # the ability to easily configure the kernel for a given architecture,
508 # endianness & set of boards without duplicating the needed configuration in
509 # hundreds of defconfig files.
510 #
511 define gen_generic_defconfigs
512 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
513 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
514 generic_defconfigs += $$(target)
515 $$(target): $(generic_config_dir)/$(bits)$(rev).config
516 $$(target): $(generic_config_dir)/$(endian).config
517 )))
518 endef
519
520 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
521 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
522
523 define describe_generic_defconfig
524 $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
525 endef
526
527 .PHONY: $(generic_defconfigs)
528 $(generic_defconfigs):
529         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
530                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
531                 grep -Ev '^#'
532         $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
533         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
534                 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
535         $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
536                 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
537                 "$(origin BOARDS)" $(BOARDS)
538         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
539
540 #
541 # Prevent generic merge_config rules attempting to merge single fragments
542 #
543 $(generic_config_dir)/%.config: ;
544
545 #
546 # Prevent direct use of generic_defconfig, which is intended to be used as the
547 # basis of the various ISA-specific targets generated above.
548 #
549 .PHONY: generic_defconfig
550 generic_defconfig:
551         $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
552         $(Q)echo "used via an ISA-specific target from the following list:"
553         $(Q)echo
554         $(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
555         $(Q)echo
556         $(Q)false
557
558 #
559 # Legacy defconfig compatibility - these targets used to be real defconfigs but
560 # now that the boards have been converted to use the generic kernel they are
561 # wrappers around the generic rules above.
562 #
563 legacy_defconfigs               += ocelot_defconfig
564 ocelot_defconfig-y              := 32r2el_defconfig BOARDS=ocelot
565
566 legacy_defconfigs               += sead3_defconfig
567 sead3_defconfig-y               := 32r2el_defconfig BOARDS=sead-3
568
569 legacy_defconfigs               += sead3micro_defconfig
570 sead3micro_defconfig-y          := micro32r2el_defconfig BOARDS=sead-3
571
572 legacy_defconfigs               += xilfpga_defconfig
573 xilfpga_defconfig-y             := 32r2el_defconfig BOARDS=xilfpga
574
575 .PHONY: $(legacy_defconfigs)
576 $(legacy_defconfigs):
577         $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)