GNU Linux-libre 4.14.266-gnu1
[releases.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 := 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)  += -march=mips32 -Wa,--trap
159 cflags-$(CONFIG_CPU_MIPS32_R2)  += -march=mips32r2 -Wa,--trap
160 cflags-$(CONFIG_CPU_MIPS32_R6)  += -march=mips32r6 -Wa,--trap -modd-spreg
161 cflags-$(CONFIG_CPU_MIPS64_R1)  += -march=mips64 -Wa,--trap
162 cflags-$(CONFIG_CPU_MIPS64_R2)  += -march=mips64r2 -Wa,--trap
163 cflags-$(CONFIG_CPU_MIPS64_R6)  += -march=mips64r6 -Wa,--trap
164 cflags-$(CONFIG_CPU_R5000)      += -march=r5000 -Wa,--trap
165 cflags-$(CONFIG_CPU_R5432)      += $(call cc-option,-march=r5400,-march=r5000) \
166                         -Wa,--trap
167 cflags-$(CONFIG_CPU_R5500)      += $(call cc-option,-march=r5500,-march=r5000) \
168                         -Wa,--trap
169 cflags-$(CONFIG_CPU_NEVADA)     += $(call cc-option,-march=rm5200,-march=r5000) \
170                         -Wa,--trap
171 cflags-$(CONFIG_CPU_RM7000)     += $(call cc-option,-march=rm7000,-march=r5000) \
172                         -Wa,--trap
173 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-march=sb1,-march=r5000) \
174                         -Wa,--trap
175 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mdmx)
176 cflags-$(CONFIG_CPU_SB1)        += $(call cc-option,-mno-mips3d)
177 cflags-$(CONFIG_CPU_R8000)      += -march=r8000 -Wa,--trap
178 cflags-$(CONFIG_CPU_R10000)     += $(call cc-option,-march=r10000,-march=r8000) \
179                         -Wa,--trap
180 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
181 ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
182 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
183 endif
184 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
185 cflags-$(CONFIG_CPU_BMIPS)      += -march=mips32 -Wa,-mips32 -Wa,--trap
186
187 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)  += $(call cc-option,-mfix-r4000,)
188 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
189 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
190
191 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
192 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
193 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
194 # similar directives in the kernel will spam the build logs with the following warnings:
195 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
196 # or
197 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
198 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
199 # been fixed properly.
200 mips-cflags                             := $(cflags-y)
201 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
202 smartmips-ase                           := $(call cc-option-yn,$(mips-cflags) -msmartmips)
203 cflags-$(smartmips-ase)                 += -msmartmips -Wa,--no-warn
204 endif
205 ifeq ($(CONFIG_CPU_MICROMIPS),y)
206 micromips-ase                           := $(call cc-option-yn,$(mips-cflags) -mmicromips)
207 cflags-$(micromips-ase)                 += -mmicromips
208 endif
209 ifeq ($(CONFIG_CPU_HAS_MSA),y)
210 toolchain-msa                           := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
211 cflags-$(toolchain-msa)                 += -DTOOLCHAIN_SUPPORTS_MSA
212 endif
213 toolchain-virt                          := $(call cc-option-yn,$(mips-cflags) -mvirt)
214 cflags-$(toolchain-virt)                += -DTOOLCHAIN_SUPPORTS_VIRT
215
216 #
217 # Firmware support
218 #
219 libs-$(CONFIG_FW_ARC)           += arch/mips/fw/arc/
220 libs-$(CONFIG_FW_CFE)           += arch/mips/fw/cfe/
221 libs-$(CONFIG_FW_SNIPROM)       += arch/mips/fw/sni/
222 libs-y                          += arch/mips/fw/lib/
223
224 #
225 # Kernel compression
226 #
227 ifdef SYS_SUPPORTS_ZBOOT
228 COMPRESSION_FNAME               = vmlinuz
229 else
230 COMPRESSION_FNAME               = vmlinux
231 endif
232
233 #
234 # Board-dependent options and extra files
235 #
236 include arch/mips/Kbuild.platforms
237
238 ifdef CONFIG_PHYSICAL_START
239 load-y                                  = $(CONFIG_PHYSICAL_START)
240 endif
241
242 entry-noisa-y                           = 0x$(shell $(NM) vmlinux 2>/dev/null \
243                                         | grep "\bkernel_entry\b" | cut -f1 -d \ )
244 ifdef CONFIG_CPU_MICROMIPS
245   #
246   # Set the ISA bit, since the kernel_entry symbol in the ELF will have it
247   # clear which would lead to images containing addresses which bootloaders may
248   # jump to as MIPS32 code.
249   #
250   entry-y = $(patsubst %0,%1,$(patsubst %2,%3,$(patsubst %4,%5, \
251               $(patsubst %6,%7,$(patsubst %8,%9,$(patsubst %a,%b, \
252               $(patsubst %c,%d,$(patsubst %e,%f,$(entry-noisa-y)))))))))
253 else
254   entry-y = $(entry-noisa-y)
255 endif
256
257 cflags-y                        += -I$(srctree)/arch/mips/include/asm/mach-generic
258 drivers-$(CONFIG_PCI)           += arch/mips/pci/
259
260 #
261 # Automatically detect the build format. By default we choose
262 # the elf format according to the load address.
263 # We can always force a build with a 64-bits symbol format by
264 # passing 'KBUILD_SYM32=no' option to the make's command line.
265 #
266 ifdef CONFIG_64BIT
267   ifndef KBUILD_SYM32
268     ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
269       KBUILD_SYM32 = y
270     endif
271   endif
272
273   ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
274     cflags-y += -msym32 -DKBUILD_64BIT_SYM32
275   else
276     ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
277       $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
278     endif
279   endif
280 endif
281
282 # When linking a 32-bit executable the LLVM linker cannot cope with a
283 # 32-bit load address that has been sign-extended to 64 bits.  Simply
284 # remove the upper 32 bits then, as it is safe to do so with other
285 # linkers.
286 ifdef CONFIG_64BIT
287         load-ld                 = $(load-y)
288 else
289         load-ld                 = $(subst 0xffffffff,0x,$(load-y))
290 endif
291
292 KBUILD_AFLAGS   += $(cflags-y)
293 KBUILD_CFLAGS   += $(cflags-y)
294 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
295 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
296
297 bootvars-y      = VMLINUX_LOAD_ADDRESS=$(load-y) \
298                   LINKER_LOAD_ADDRESS=$(load-ld) \
299                   VMLINUX_ENTRY_ADDRESS=$(entry-y) \
300                   PLATFORM="$(platform-y)" \
301                   ITS_INPUTS="$(its-y)"
302 ifdef CONFIG_32BIT
303 bootvars-y      += ADDR_BITS=32
304 endif
305 ifdef CONFIG_64BIT
306 bootvars-y      += ADDR_BITS=64
307 endif
308
309 # This is required to get dwarf unwinding tables into .debug_frame
310 # instead of .eh_frame so we don't discard them.
311 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
312
313 LDFLAGS                 += -m $(ld-emul)
314
315 ifdef CONFIG_MIPS
316 CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
317         egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
318         sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
319 ifdef CONFIG_64BIT
320 CHECKFLAGS              += -m64
321 endif
322 endif
323
324 OBJCOPYFLAGS            += --remove-section=.reginfo
325
326 head-y := arch/mips/kernel/head.o
327
328 libs-y                  += arch/mips/lib/
329 libs-y                  += arch/mips/math-emu/
330
331 # See arch/mips/Kbuild for content of core part of the kernel
332 core-y += arch/mips/
333
334 drivers-$(CONFIG_OPROFILE)      += arch/mips/oprofile/
335
336 # suspend and hibernation support
337 drivers-$(CONFIG_PM)    += arch/mips/power/
338
339 # boot image targets (arch/mips/boot/)
340 boot-y                  := vmlinux.bin
341 boot-y                  += vmlinux.ecoff
342 boot-y                  += vmlinux.srec
343 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000 2> /dev/null), 0)
344 boot-y                  += uImage
345 boot-y                  += uImage.bin
346 boot-y                  += uImage.bz2
347 boot-y                  += uImage.gz
348 boot-y                  += uImage.lzma
349 boot-y                  += uImage.lzo
350 endif
351 boot-y                  += vmlinux.itb
352 boot-y                  += vmlinux.gz.itb
353 boot-y                  += vmlinux.bz2.itb
354 boot-y                  += vmlinux.lzma.itb
355 boot-y                  += vmlinux.lzo.itb
356
357 # compressed boot image targets (arch/mips/boot/compressed/)
358 bootz-y                 := vmlinuz
359 bootz-y                 += vmlinuz.bin
360 bootz-y                 += vmlinuz.ecoff
361 bootz-y                 += vmlinuz.srec
362 ifeq ($(shell expr $(zload-y) \< 0xffffffff80000000 2> /dev/null), 0)
363 bootz-y                 += uzImage.bin
364 endif
365
366 ifdef CONFIG_LASAT
367 rom.bin rom.sw: vmlinux
368         $(Q)$(MAKE) $(build)=arch/mips/lasat/image \
369                 $(bootvars-y) $@
370 endif
371
372 #
373 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
374 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
375 # convert to ECOFF using elf2ecoff.
376 #
377 quiet_cmd_32 = OBJCOPY $@
378         cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
379 vmlinux.32: vmlinux
380         $(call cmd,32)
381
382 #
383 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
384 # ELF files from 32-bit files by conversion.
385 #
386 quiet_cmd_64 = OBJCOPY $@
387         cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
388 vmlinux.64: vmlinux
389         $(call cmd,64)
390
391 all:    $(all-y)
392
393 # boot
394 $(boot-y): $(vmlinux-32) FORCE
395         $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
396                 $(bootvars-y) arch/mips/boot/$@
397
398 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
399 # boot/compressed
400 $(bootz-y): $(vmlinux-32) FORCE
401         $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
402                 $(bootvars-y) 32bit-bfd=$(32bit-bfd) $@
403 else
404 vmlinuz: FORCE
405         @echo '   CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
406         /bin/false
407 endif
408
409
410 CLEAN_FILES += vmlinux.32 vmlinux.64
411
412 # device-trees
413 core-$(CONFIG_BUILTIN_DTB) += arch/mips/boot/dts/
414
415 %.dtb %.dtb.S %.dtb.o: | scripts
416         $(Q)$(MAKE) $(build)=arch/mips/boot/dts arch/mips/boot/dts/$@
417
418 PHONY += dtbs
419 dtbs: scripts
420         $(Q)$(MAKE) $(build)=arch/mips/boot/dts
421
422 PHONY += dtbs_install
423 dtbs_install:
424         $(Q)$(MAKE) $(dtbinst)=arch/mips/boot/dts
425
426 archprepare:
427 ifdef CONFIG_MIPS32_N32
428         @$(kecho) '  Checking missing-syscalls for N32'
429         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
430 endif
431 ifdef CONFIG_MIPS32_O32
432         @$(kecho) '  Checking missing-syscalls for O32'
433         $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
434 endif
435
436 install:
437         $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
438 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
439         $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
440 endif
441         $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
442         $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
443
444 archclean:
445         $(Q)$(MAKE) $(clean)=arch/mips/boot
446         $(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
447         $(Q)$(MAKE) $(clean)=arch/mips/boot/tools
448         $(Q)$(MAKE) $(clean)=arch/mips/lasat
449
450 define archhelp
451         echo '  install              - install kernel into $(INSTALL_PATH)'
452         echo '  vmlinux.ecoff        - ECOFF boot image'
453         echo '  vmlinux.bin          - Raw binary boot image'
454         echo '  vmlinux.srec         - SREC boot image'
455         echo '  vmlinux.32           - 64-bit boot image wrapped in 32bits (IP22/IP32)'
456         echo '  vmlinuz              - Compressed boot(zboot) image'
457         echo '  vmlinuz.ecoff        - ECOFF zboot image'
458         echo '  vmlinuz.bin          - Raw binary zboot image'
459         echo '  vmlinuz.srec         - SREC zboot image'
460         echo '  uImage               - U-Boot image'
461         echo '  uImage.bin           - U-Boot image (uncompressed)'
462         echo '  uImage.bz2           - U-Boot image (bz2)'
463         echo '  uImage.gz            - U-Boot image (gzip)'
464         echo '  uImage.lzma          - U-Boot image (lzma)'
465         echo '  uImage.lzo           - U-Boot image (lzo)'
466         echo '  uzImage.bin          - U-Boot image (self-extracting)'
467         echo '  dtbs                 - Device-tree blobs for enabled boards'
468         echo '  dtbs_install         - Install dtbs to $(INSTALL_DTBS_PATH)'
469         echo
470         echo '  These will be default as appropriate for a configured platform.'
471         echo
472         echo '  If you are targeting a system supported by generic kernels you may'
473         echo '  configure the kernel for a given architecture target like so:'
474         echo
475         echo '  {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
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 .PHONY: $(generic_defconfigs)
512 $(generic_defconfigs):
513         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
514                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
515                 grep -Ev '^#'
516         $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
517         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
518                 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
519         $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
520                 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
521                 "$(origin BOARDS)" $(BOARDS)
522         $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
523
524 #
525 # Prevent generic merge_config rules attempting to merge single fragments
526 #
527 $(generic_config_dir)/%.config: ;
528
529 #
530 # Prevent direct use of generic_defconfig, which is intended to be used as the
531 # basis of the various ISA-specific targets generated above.
532 #
533 .PHONY: generic_defconfig
534 generic_defconfig:
535         $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
536         $(Q)echo "used via an ISA-specific target from the following list:"
537         $(Q)echo
538         $(Q)for cfg in $(generic_defconfigs); do echo "  $${cfg}"; done
539         $(Q)echo
540         $(Q)false
541
542 #
543 # Legacy defconfig compatibility - these targets used to be real defconfigs but
544 # now that the boards have been converted to use the generic kernel they are
545 # wrappers around the generic rules above.
546 #
547 .PHONY: sead3_defconfig
548 sead3_defconfig:
549         $(Q)$(MAKE) -f $(srctree)/Makefile 32r2el_defconfig BOARDS=sead-3
550
551 .PHONY: sead3micro_defconfig
552 sead3micro_defconfig:
553         $(Q)$(MAKE) -f $(srctree)/Makefile micro32r2el_defconfig BOARDS=sead-3