1fb97579b6b4ab6d80c745c493da9367d18bf567
[linux-2.6-microblaze.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) $(build)=arch/mips/tools elf-entry
17 ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y)
18         $(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check
19 endif
20         $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
21
22 KBUILD_DEFCONFIG := 32r2el_defconfig
23 KBUILD_DTBS      := dtbs
24
25 #
26 # Select the object file format to substitute into the linker script.
27 #
28 ifdef CONFIG_CPU_LITTLE_ENDIAN
29 32bit-tool-archpref     = mipsel
30 64bit-tool-archpref     = mips64el
31 32bit-bfd               = elf32-tradlittlemips
32 64bit-bfd               = elf64-tradlittlemips
33 32bit-emul              = elf32ltsmip
34 64bit-emul              = elf64ltsmip
35 else
36 32bit-tool-archpref     = mips
37 64bit-tool-archpref     = mips64
38 32bit-bfd               = elf32-tradbigmips
39 64bit-bfd               = elf64-tradbigmips
40 32bit-emul              = elf32btsmip
41 64bit-emul              = elf64btsmip
42 endif
43
44 ifdef CONFIG_32BIT
45 tool-archpref           = $(32bit-tool-archpref)
46 UTS_MACHINE             := mips
47 endif
48 ifdef CONFIG_64BIT
49 tool-archpref           = $(64bit-tool-archpref)
50 UTS_MACHINE             := mips64
51 endif
52
53 ifdef cross_compiling
54   ifeq ($(CROSS_COMPILE),)
55     CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
56   endif
57 endif
58
59 ifdef CONFIG_FUNCTION_GRAPH_TRACER
60   ifndef KBUILD_MCOUNT_RA_ADDRESS
61     ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
62       cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
63     endif
64   endif
65 endif
66 cflags-y += $(call cc-option, -mno-check-zero-division)
67
68 ifdef CONFIG_32BIT
69 ld-emul                 = $(32bit-emul)
70 vmlinux-32              = vmlinux
71 vmlinux-64              = vmlinux.64
72
73 cflags-y                += -mabi=32
74 endif
75
76 ifdef CONFIG_64BIT
77 ld-emul                 = $(64bit-emul)
78 vmlinux-32              = vmlinux.32
79 vmlinux-64              = vmlinux
80
81 cflags-y                += -mabi=64
82 endif
83
84 all-$(CONFIG_BOOT_ELF32)        := $(vmlinux-32)
85 all-$(CONFIG_BOOT_ELF64)        := $(vmlinux-64)
86 all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
87
88 #
89 # GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
90 # code since it only slows down the whole thing.  At some point we might make
91 # use of global pointer optimizations but their use of $28 conflicts with
92 # the current pointer optimization.
93 #
94 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
95 # machines may also.  Since BFD is incredibly buggy with respect to
96 # crossformat linking we rely on the elf2ecoff tool for format conversion.
97 #
98 cflags-y                        += -G 0 -mno-abicalls -fno-pic -pipe
99 cflags-y                        += -msoft-float
100 LDFLAGS_vmlinux                 += -G 0 -static -n -nostdlib
101 KBUILD_AFLAGS_MODULE            += -mlong-calls
102 KBUILD_CFLAGS_MODULE            += -mlong-calls
103
104 ifeq ($(CONFIG_RELOCATABLE),y)
105 LDFLAGS_vmlinux                 += --emit-relocs
106 endif
107
108 #
109 # pass -msoft-float to GAS if it supports it.  However on newer binutils
110 # (specifically newer than 2.24.51.20140728) we then also need to explicitly
111 # set ".set hardfloat" in all files which manipulate floating point registers.
112 #
113 ifneq ($(call as-option,-Wa$(comma)-msoft-float,),)
114         cflags-y                += -DGAS_HAS_SET_HARDFLOAT -Wa,-msoft-float
115 endif
116
117 cflags-y += -ffreestanding
118
119 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += -EB
120 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -EL
121
122 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
123                                    -fno-omit-frame-pointer
124
125 # Some distribution-specific toolchains might pass the -fstack-check
126 # option during the build, which adds a simple stack-probe at the beginning
127 # of every function.  This stack probe is to ensure that there is enough
128 # stack space, else a SEGV is generated.  This is not desirable for MIPS
129 # as kernel stacks are small, placed in unmapped virtual memory, and do not
130 # grow when overflowed.  Especially on SGI IP27 platforms, this check will
131 # lead to a NULL pointer dereference in _raw_spin_lock_irq.
132 #
133 # In disassembly, this stack probe appears at the top of a function as:
134 #    sd         zero,<offset>(sp)
135 # Where <offset> is a negative value.
136 #
137 cflags-y += -fno-stack-check
138
139 # binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,
140 # supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll
141 # instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h
142 # for a description).
143 #
144 # We disable this in order to prevent the assembler meddling with the
145 # instruction that labels refer to, ie. if we label an ll instruction:
146 #
147 # 1: ll v0, 0(a0)
148 #
149 # ...then with the assembler fix applied the label may actually point at a sync
150 # instruction inserted by the assembler, and if we were using the label in an
151 # exception table the table would no longer contain the address of the ll
152 # instruction.
153 #
154 # Avoid this by explicitly disabling that assembler behaviour.
155 #
156 cflags-y += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
157
158 #
159 # CPU-dependent compiler/assembler options for optimization.
160 #
161 cflags-$(CONFIG_CPU_R3000)      += -march=r3000
162 cflags-$(CONFIG_CPU_TX39XX)     += -march=r3900
163 cflags-$(CONFIG_CPU_R4300)      += -march=r4300 -Wa,--trap
164 cflags-$(CONFIG_CPU_VR41XX)     += -march=r4100 -Wa,--trap
165 cflags-$(CONFIG_CPU_R4X00)      += -march=r4600 -Wa,--trap
166 cflags-$(CONFIG_CPU_TX49XX)     += -march=r4600 -Wa,--trap
167 cflags-$(CONFIG_CPU_MIPS32_R1)  += -march=mips32 -Wa,--trap
168 cflags-$(CONFIG_CPU_MIPS32_R2)  += -march=mips32r2 -Wa,--trap
169 cflags-$(CONFIG_CPU_MIPS32_R5)  += -march=mips32r5 -Wa,--trap -modd-spreg
170 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap -modd-spreg
171 cflags-$(CONFIG_CPU_MIPS64_R1)  += -march=mips64 -Wa,--trap
172 cflags-$(CONFIG_CPU_MIPS64_R2)  += -march=mips64r2 -Wa,--trap
173 cflags-$(CONFIG_CPU_MIPS64_R5)  += -march=mips64r5 -Wa,--trap
174 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
175 cflags-$(CONFIG_CPU_P5600)      += -march=p5600 -Wa,--trap -modd-spreg
176 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
177 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
178                         -Wa,--trap
179 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
180                         -Wa,--trap
181 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
182                         -Wa,--trap
183 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
184                         -Wa,--trap
185 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
186 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
187 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
188                         -Wa,--trap
189 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
190 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
191 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
192 endif
193 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
194 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
195
196 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
197 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
198 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
199
200 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
201 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
202 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
203 # similar directives in the kernel will spam the build logs with the following warnings:
204 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
205 # or
206 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
207 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
208 # been fixed properly.
209 mips-cflags                             := $(cflags-y)
210 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
211 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
212 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
213 endif
214 ifeq ($(CONFIG_CPU_MICROMIPS),y)
215 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
216 cflags-$(micromips-ase)                 += -mmicromips
217 endif
218 ifeq ($(CONFIG_CPU_HAS_MSA),y)
219 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
220 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
221 endif
222 toolchain-virt                          := $(call cc-option-yn,$(mips-cflags) -mvirt)
223 cflags-$(toolchain-virt)                += -DTOOLCHAIN_SUPPORTS_VIRT
224 # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
225 # only warns
226 xpa-cflags-y                            := $(mips-cflags)
227 xpa-cflags-$(micromips-ase)             += -mmicromips -Wa$(comma)-fatal-warnings
228 toolchain-xpa                           := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
229 cflags-$(toolchain-xpa)                 += -DTOOLCHAIN_SUPPORTS_XPA
230 toolchain-crc                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
231 cflags-$(toolchain-crc)                 += -DTOOLCHAIN_SUPPORTS_CRC
232 toolchain-dsp                           := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
233 cflags-$(toolchain-dsp)                 += -DTOOLCHAIN_SUPPORTS_DSP
234 toolchain-ginv                          := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
235 cflags-$(toolchain-ginv)                += -DTOOLCHAIN_SUPPORTS_GINV
236
237 #
238 # Firmware support
239 #
240 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
241 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
242 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
243 libs-y                          += arch/mips/fw/lib/
244
245 #
246 # Kernel compression
247 #
248 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
249 COMPRESSION_FNAME               = vmlinuz
250 else
251 COMPRESSION_FNAME               = vmlinux
252 endif
253
254 #
255 # Board-dependent options and extra files
256 #
257 include arch/mips/Kbuild.platforms
258
259 ifdef CONFIG_PHYSICAL_START
260 load-y                                  = $(CONFIG_PHYSICAL_START)
261 endif
262
263 entry-y                         = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
264 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
265 drivers-$(CONFIG_PCI)           += arch/mips/pci/
266
267 #
268 # Automatically detect the build format. By default we choose
269 # the elf format according to the load address.
270 # We can always force a build with a 64-bits symbol format by
271 # passing 'KBUILD_SYM32=no' option to the make's command line.
272 #
273 ifdef CONFIG_64BIT
274   ifndef KBUILD_SYM32
275     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
276       KBUILD_SYM32 = y
277     endif
278   endif
279
280   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
281     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
282   else
283     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
284       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
285     endif
286   endif
287 endif
288
289 # When linking a 32-bit executable the LLVM linker cannot cope with a
290 # 32-bit load address that has been sign-extended to 64 bits.  Simply
291 # remove the upper 32 bits then, as it is safe to do so with other
292 # linkers.
293 ifdef CONFIG_64BIT
294         load-ld                 = $(load-y)
295 else
296         load-ld                 = $(subst 0xffffffff,0x,$(load-y))
297 endif
298
299 KBUILD_AFLAGS   += $(cflags-y)
300 KBUILD_CFLAGS   += $(cflags-y)
301 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
302 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
303
304 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
305                   LINKER_LOAD_ADDRESS=$(load-ld) \
306                   VMLINUX_ENTRY_ADDRESS=$(entry-y) \
307                   PLATFORM="$(platform-y)" \
308                   ITS_INPUTS="$(its-y)"
309 ifdef CONFIG_32BIT
310 bootvars-y      += ADDR_BITS=32
311 endif
312 ifdef CONFIG_64BIT
313 bootvars-y      += ADDR_BITS=64
314 endif
315
316 # This is required to get dwarf unwinding tables into .debug_frame
317 # instead of .eh_frame so we don't discard them.
318 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
319
320 KBUILD_LDFLAGS          += -m $(ld-emul)
321
322 ifdef CONFIG_MIPS
323 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
324         egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
325         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
326 endif
327
328 OBJCOPYFLAGS            += --remove-section=.reginfo
329
330 head-y := arch/mips/kernel/head.o
331
332 libs-y                  += arch/mips/lib/
333 libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
334
335 drivers-y                       += arch/mips/crypto/
336
337 # suspend and hibernation support
338 drivers-$(CONFIG_PM)    += arch/mips/power/
339
340 # boot image targets (arch/mips/boot/)
341 boot-y                  := vmlinux.bin
342 boot-y                  += vmlinux.ecoff
343 boot-y                  += vmlinux.srec
344 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
345 boot-y                  += uImage
346 boot-y                  += uImage.bin
347 boot-y                  += uImage.bz2
348 boot-y                  += uImage.gz
349 boot-y                  += uImage.lzma
350 boot-y                  += uImage.lzo
351 endif
352 boot-y                  += vmlinux.itb
353 boot-y                  += vmlinux.gz.itb
354 boot-y                  += vmlinux.bz2.itb
355 boot-y                  += vmlinux.lzma.itb
356 boot-y                  += vmlinux.lzo.itb
357
358 # compressed boot image targets (arch/mips/boot/compressed/)
359 bootz-y                 := vmlinuz
360 bootz-y                 += vmlinuz.bin
361 bootz-y                 += vmlinuz.ecoff
362 bootz-y                 += vmlinuz.srec
363 ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
364 bootz-y                 += uzImage.bin
365 endif
366 bootz-y                 += vmlinuz.itb
367
368 #
369 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
370 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
371 # convert to ECOFF using elf2ecoff.
372 #
373 quiet_cmd_32 = OBJCOPY $@
374         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
375 vmlinux.32: vmlinux
376         $(call cmd,32)
377
378 #
379 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
380 # ELF files from 32-bit files by conversion.
381 #
382 quiet_cmd_64 = OBJCOPY $@
383         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
384 vmlinux.64: vmlinux
385         $(call cmd,64)
386
387 all:    $(all-y) $(KBUILD_DTBS)
388
389 # boot
390 $(boot-y): $(vmlinux-32) FORCE
391         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
392                 $(bootvars-y) arch/mips/boot/$@
393
394 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
395 # boot/compressed
396 $(bootz-y): $(vmlinux-32) FORCE
397         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
398                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
399 else
400 vmlinuz: FORCE
401         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
402         /bin/false
403 endif
404
405
406 CLEAN_FILES += vmlinux.32 vmlinux.64
407
408 # device-trees
409 core-y += arch/mips/boot/dts/
410
411 archprepare:
412 ifdef CONFIG_MIPS32_N32
413         @$(kecho) '  Checking missing-syscalls for N32'
414         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
415 endif
416 ifdef CONFIG_MIPS32_O32
417         @$(kecho) '  Checking missing-syscalls for O32'
418         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
419 endif
420
421 install:
422         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
423 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
424         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
425 endif
426         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
427         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
428
429 archclean:
430         $(Q)$(MAKE) $(clean)=arch/mips/boot
431         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
432         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
433
434 archheaders:
435         $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
436
437 define archhelp
438         echo '  install              - install kernel into $(INSTALL_PATH)'
439         echo '  vmlinux.ecoff        - ECOFF boot image'
440         echo '  vmlinux.bin          - Raw binary boot image'
441         echo '  vmlinux.srec         - SREC boot image'
442         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
443         echo '  vmlinuz              - Compressed boot(zboot) image'
444         echo '  vmlinuz.ecoff        - ECOFF zboot image'
445         echo '  vmlinuz.bin          - Raw binary zboot image'
446         echo '  vmlinuz.srec         - SREC zboot image'
447         echo '  uImage               - U-Boot image'
448         echo '  uImage.bin           - U-Boot image (uncompressed)'
449         echo '  uImage.bz2           - U-Boot image (bz2)'
450         echo '  uImage.gz            - U-Boot image (gzip)'
451         echo '  uImage.lzma          - U-Boot image (lzma)'
452         echo '  uImage.lzo           - U-Boot image (lzo)'
453         echo '  uzImage.bin          - U-Boot image (self-extracting)'
454         echo
455         echo '  These will be default as appropriate for a configured platform.'
456         echo
457         echo '  If you are targeting a system supported by generic kernels you may'
458         echo '  configure the kernel for a given architecture target like so:'
459         echo
460         echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
461         echo
462         echo '  Where BOARDS is some subset of the following:'
463         for board in $(sort $(BOARDS)); do echo "    $${board}"; done
464         echo
465         echo '  Specifically the following generic default configurations are'
466         echo '  supported:'
467         echo
468         $(foreach cfg,$(generic_defconfigs),
469           printf "  %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
470         echo
471         echo '  The following legacy default configurations have been converted to'
472         echo '  generic and can still be used:'
473         echo
474         $(foreach cfg,$(sort $(legacy_defconfigs)),
475           printf "  %-24s - Build $($(cfg)-y)\n" $(cfg);)
476         echo
477         echo '  Otherwise, the following default configurations are available:'
478 endef
479
480 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
481 generic_defconfigs :=
482
483 #
484 # If the user generates a generic kernel configuration without specifying a
485 # list of boards to include the config fragments for, default to including all
486 # available board config fragments.
487 #
488 ifeq ($(BOARDS),)
489 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
490 endif
491
492 #
493 # Generic kernel configurations which merge generic_defconfig with the
494 # appropriate config fragments from arch/mips/configs/generic/, resulting in
495 # the ability to easily configure the kernel for a given architecture,
496 # endianness & set of boards without duplicating the needed configuration in
497 # hundreds of defconfig files.
498 #
499 define gen_generic_defconfigs
500 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
501 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
502 generic_defconfigs += $$(target)
503 $$(target): $(generic_config_dir)/$(bits)$(rev).config
504 $$(target): $(generic_config_dir)/$(endian).config
505 )))
506 endef
507
508 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
509 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
510
511 define describe_generic_defconfig
512 $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
513 endef
514
515 .PHONY: $(generic_defconfigs)
516 $(generic_defconfigs):
517         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
518                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
519                 grep -Ev '^#'
520         $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
521         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
522                 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
523         $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
524                 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
525                 "$(origin BOARDS)" $(BOARDS)
526         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
527
528 #
529 # Prevent generic merge_config rules attempting to merge single fragments
530 #
531 $(generic_config_dir)/%.config: ;
532
533 #
534 # Prevent direct use of generic_defconfig, which is intended to be used as the
535 # basis of the various ISA-specific targets generated above.
536 #
537 .PHONY: generic_defconfig
538 generic_defconfig:
539         $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
540         $(Q)echo "used via an ISA-specific target from the following list:"
541         $(Q)echo
542         $(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
543         $(Q)echo
544         $(Q)false
545
546 #
547 # Legacy defconfig compatibility - these targets used to be real defconfigs but
548 # now that the boards have been converted to use the generic kernel they are
549 # wrappers around the generic rules above.
550 #
551 legacy_defconfigs               += ocelot_defconfig
552 ocelot_defconfig-y              := 32r2el_defconfig BOARDS=ocelot
553
554 legacy_defconfigs               += sead3_defconfig
555 sead3_defconfig-y               := 32r2el_defconfig BOARDS=sead-3
556
557 legacy_defconfigs               += sead3micro_defconfig
558 sead3micro_defconfig-y          := micro32r2el_defconfig BOARDS=sead-3
559
560 legacy_defconfigs               += xilfpga_defconfig
561 xilfpga_defconfig-y             := 32r2el_defconfig BOARDS=xilfpga
562
563 legacy_defconfigs               += pistachio_defconfig
564 pistachio_defconfig-y           := 32r2el_defconfig BOARDS=marduk
565
566 .PHONY: $(legacy_defconfigs)
567 $(legacy_defconfigs):
568         $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)