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.
12 #
13
14 archscripts: scripts_basic
15 $(Q)$(MAKE) $(build)=arch/mips/tools elf-entry
16 ifeq ($(CONFIG_CPU_LOONGSON3_WORKAROUNDS),y)
17 $(Q)$(MAKE) $(build)=arch/mips/tools loongson3-llsc-check
18 endif
19 $(Q)$(MAKE) $(build)=arch/mips/boot/tools relocs
20
21 KBUILD_DEFCONFIG := 32r2el_defconfig
22 KBUILD_DTBS := dtbs
23
24 #
25 # Select the object file format to substitute into the linker script.
26 #
27 ifdef CONFIG_CPU_LITTLE_ENDIAN
28 32bit-tool-archpref = mipsel
29 64bit-tool-archpref = mips64el
30 32bit-bfd = elf32-tradlittlemips
31 64bit-bfd = elf64-tradlittlemips
32 32bit-emul = elf32ltsmip
33 64bit-emul = elf64ltsmip
34 else
35 32bit-tool-archpref = mips
36 64bit-tool-archpref = mips64
37 32bit-bfd = elf32-tradbigmips
38 64bit-bfd = elf64-tradbigmips
39 32bit-emul = elf32btsmip
40 64bit-emul = elf64btsmip
41 endif
42
43 ifdef CONFIG_32BIT
44 tool-archpref = $(32bit-tool-archpref)
45 UTS_MACHINE := mips
46 endif
47 ifdef CONFIG_64BIT
48 tool-archpref = $(64bit-tool-archpref)
49 UTS_MACHINE := mips64
50 endif
51
52 ifdef cross_compiling
53 ifeq ($(CROSS_COMPILE),)
54 CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
55 endif
56 endif
57
58 ifdef CONFIG_FUNCTION_GRAPH_TRACER
59 ifndef KBUILD_MCOUNT_RA_ADDRESS
60 ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
61 cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
62 endif
63 endif
64 endif
65 cflags-y += $(call cc-option, -mno-check-zero-division)
66
67 ifdef CONFIG_32BIT
68 ld-emul = $(32bit-emul)
69 vmlinux-32 = vmlinux
70 vmlinux-64 = vmlinux.64
71
72 cflags-y += -mabi=32
73 endif
74
75 ifdef CONFIG_64BIT
76 ld-emul = $(64bit-emul)
77 vmlinux-32 = vmlinux.32
78 vmlinux-64 = vmlinux
79
80 cflags-y += -mabi=64
81 endif
82
83 all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
84 all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
85 all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
86
87 #
88 # GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
89 # code since it only slows down the whole thing. At some point we might make
90 # use of global pointer optimizations but their use of $28 conflicts with
91 # the current pointer optimization.
92 #
93 # The DECStation requires an ECOFF kernel for remote booting, other MIPS
94 # machines may also. Since BFD is incredibly buggy with respect to
95 # crossformat linking we rely on the elf2ecoff tool for format conversion.
96 #
97 cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
98 cflags-y += -msoft-float -Wa,-msoft-float
99 LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
100 KBUILD_AFLAGS_MODULE += -mlong-calls
101 KBUILD_CFLAGS_MODULE += -mlong-calls
102
103 ifeq ($(CONFIG_RELOCATABLE),y)
104 LDFLAGS_vmlinux += --emit-relocs
105 endif
106
107 cflags-y += -ffreestanding
108
109 cflags-$(CONFIG_CPU_BIG_ENDIAN) += -EB
110 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -EL
111
112 cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
113 -fno-omit-frame-pointer
114
115 # Some distribution-specific toolchains might pass the -fstack-check
116 # option during the build, which adds a simple stack-probe at the beginning
117 # of every function. This stack probe is to ensure that there is enough
118 # stack space, else a SEGV is generated. This is not desirable for MIPS
119 # as kernel stacks are small, placed in unmapped virtual memory, and do not
120 # grow when overflowed. Especially on SGI IP27 platforms, this check will
121 # lead to a NULL pointer dereference in _raw_spin_lock_irq.
122 #
123 # In disassembly, this stack probe appears at the top of a function as:
124 # sd zero,<offset>(sp)
125 # Where <offset> is a negative value.
126 #
127 cflags-y += -fno-stack-check
128
129 # binutils from v2.35 when built with --enable-mips-fix-loongson3-llsc=yes,
130 # supports an -mfix-loongson3-llsc flag which emits a sync prior to each ll
131 # instruction to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h
132 # for a description).
133 #
134 # We disable this in order to prevent the assembler meddling with the
135 # instruction that labels refer to, ie. if we label an ll instruction:
136 #
137 # 1: ll v0, 0(a0)
138 #
139 # ...then with the assembler fix applied the label may actually point at a sync
140 # instruction inserted by the assembler, and if we were using the label in an
141 # exception table the table would no longer contain the address of the ll
142 # instruction.
143 #
144 # Avoid this by explicitly disabling that assembler behaviour.
145 #
146 cflags-y += $(call cc-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
147
148 #
149 # CPU-dependent compiler/assembler options for optimization.
150 #
151 cflags-$(CONFIG_CPU_R3000) += $(call cc-option,-march=r3000,-march=mips1)
152 cflags-$(CONFIG_CPU_R4300) += $(call cc-option,-march=r4300,-march=mips3) -Wa,--trap
153 cflags-$(CONFIG_CPU_R4X00) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap
154 cflags-$(CONFIG_CPU_TX49XX) += $(call cc-option,-march=r4600,-march=mips3) -Wa,--trap
155 cflags-$(CONFIG_CPU_MIPS32_R1) += -march=mips32 -Wa,--trap
156 cflags-$(CONFIG_CPU_MIPS32_R2) += -march=mips32r2 -Wa,--trap
157 cflags-$(CONFIG_CPU_MIPS32_R5) += -march=mips32r5 -Wa,--trap -modd-spreg
158 cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg
159 cflags-$(CONFIG_CPU_MIPS64_R1) += -march=mips64 -Wa,--trap
160 cflags-$(CONFIG_CPU_MIPS64_R2) += -march=mips64r2 -Wa,--trap
161 cflags-$(CONFIG_CPU_MIPS64_R5) += -march=mips64r5 -Wa,--trap
162 cflags-$(CONFIG_CPU_MIPS64_R6) += -march=mips64r6 -Wa,--trap
163 cflags-$(CONFIG_CPU_P5600) += $(call cc-option,-march=p5600,-march=mips32r5) \
164 -Wa,--trap -modd-spreg
165 cflags-$(CONFIG_CPU_R5000) += $(call cc-option,-march=r5000,-march=mips4) \
166 -Wa,--trap
167 cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=mips4) \
168 -Wa,--trap
169 cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=mips4) \
170 -Wa,--trap
171 cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=mips4) \
172 -Wa,--trap
173 cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=mips64) \
174 -Wa,--trap
175 cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mdmx)
176 cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-mno-mips3d)
177 cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=mips4) \
178 -Wa,--trap
179 cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -march=octeon -Wa,--trap
180 cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
181 cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,--trap
182
183 cflags-$(CONFIG_CPU_LOONGSON2E) += \
184 $(call cc-option,-march=loongson2e,-march=mips3) -Wa,--trap
185 cflags-$(CONFIG_CPU_LOONGSON2F) += \
186 $(call cc-option,-march=loongson2f,-march=mips3) -Wa,--trap
187 # Some -march= flags enable MMI instructions, and GCC complains about that
188 # support being enabled alongside -msoft-float. Thus explicitly disable MMI.
189 cflags-$(CONFIG_CPU_LOONGSON2EF) += $(call cc-option,-mno-loongson-mmi)
190 cflags-$(CONFIG_CPU_LOONGSON64) += \
191 $(call cc-option,-march=loongson3a,-march=mips64r2) -Wa,--trap
192 cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi)
193
194 cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
195 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
196 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
197 ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
198 cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop
199 cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump
200 endif
201
202 #
203 # Some versions of binutils, not currently mainline as of 2019/02/04, support
204 # an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction
205 # to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a
206 # description).
207 #
208 # We disable this in order to prevent the assembler meddling with the
209 # instruction that labels refer to, ie. if we label an ll instruction:
210 #
211 # 1: ll v0, 0(a0)
212 #
213 # ...then with the assembler fix applied the label may actually point at a sync
214 # instruction inserted by the assembler, and if we were using the label in an
215 # exception table the table would no longer contain the address of the ll
216 # instruction.
217 #
218 # Avoid this by explicitly disabling that assembler behaviour. If upstream
219 # binutils does not merge support for the flag then we can revisit & remove
220 # this later - for now it ensures vendor toolchains don't cause problems.
221 #
222 cflags-$(CONFIG_CPU_LOONGSON64) += $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
223
224 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
225 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
226 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
227 # similar directives in the kernel will spam the build logs with the following warnings:
228 # Warning: the `smartmips' extension requires MIPS32 revision 1 or greater
229 # or
230 # Warning: the 64-bit MIPS architecture does not support the `smartmips' extension
231 # Pass -Wa,--no-warn to disable all assembler warnings until the kernel code has
232 # been fixed properly.
233 mips-cflags := $(cflags-y)
234 ifeq ($(CONFIG_CPU_HAS_SMARTMIPS),y)
235 smartmips-ase := $(call cc-option-yn,$(mips-cflags) -msmartmips)
236 cflags-$(smartmips-ase) += -msmartmips -Wa,--no-warn
237 endif
238 ifeq ($(CONFIG_CPU_MICROMIPS),y)
239 micromips-ase := $(call cc-option-yn,$(mips-cflags) -mmicromips)
240 cflags-$(micromips-ase) += -mmicromips
241 endif
242 ifeq ($(CONFIG_CPU_HAS_MSA),y)
243 toolchain-msa := $(call cc-option-yn,$(mips-cflags) -mhard-float -mfp64 -Wa$(comma)-mmsa)
244 cflags-$(toolchain-msa) += -DTOOLCHAIN_SUPPORTS_MSA
245 endif
246 toolchain-virt := $(call cc-option-yn,$(mips-cflags) -mvirt)
247 cflags-$(toolchain-virt) += -DTOOLCHAIN_SUPPORTS_VIRT
248 # For -mmicromips, use -Wa,-fatal-warnings to catch unsupported -mxpa which
249 # only warns
250 xpa-cflags-y := $(mips-cflags)
251 xpa-cflags-$(micromips-ase) += -mmicromips -Wa$(comma)-fatal-warnings
252 toolchain-xpa := $(call cc-option-yn,$(xpa-cflags-y) -mxpa)
253 cflags-$(toolchain-xpa) += -DTOOLCHAIN_SUPPORTS_XPA
254 toolchain-crc := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mcrc)
255 cflags-$(toolchain-crc) += -DTOOLCHAIN_SUPPORTS_CRC
256 toolchain-dsp := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mdsp)
257 cflags-$(toolchain-dsp) += -DTOOLCHAIN_SUPPORTS_DSP
258 toolchain-ginv := $(call cc-option-yn,$(mips-cflags) -Wa$(comma)-mginv)
259 cflags-$(toolchain-ginv) += -DTOOLCHAIN_SUPPORTS_GINV
260
261 #
262 # Firmware support
263 #
264 libs-$(CONFIG_FW_ARC) += arch/mips/fw/arc/
265 libs-$(CONFIG_FW_CFE) += arch/mips/fw/cfe/
266 libs-$(CONFIG_FW_SNIPROM) += arch/mips/fw/sni/
267 libs-y += arch/mips/fw/lib/
268
269 #
270 # Kernel compression
271 #
272 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
273 COMPRESSION_FNAME = vmlinuz
274 else
275 COMPRESSION_FNAME = vmlinux
276 endif
277
278 #
279 # Board-dependent options and extra files
280 #
281 include $(srctree)/arch/mips/Kbuild.platforms
282
283 ifdef CONFIG_PHYSICAL_START
284 load-y = $(CONFIG_PHYSICAL_START)
285 endif
286
287 entry-y = $(shell $(objtree)/arch/mips/tools/elf-entry vmlinux)
288 cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
289 drivers-$(CONFIG_PCI) += arch/mips/pci/
290
291 #
292 # Automatically detect the build format. By default we choose
293 # the elf format according to the load address.
294 # We can always force a build with a 64-bits symbol format by
295 # passing 'KBUILD_SYM32=no' option to the make's command line.
296 #
297 ifdef CONFIG_64BIT
298 ifndef KBUILD_SYM32
299 ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
300 KBUILD_SYM32 = $(call cc-option-yn, -msym32)
301 endif
302 endif
303
304 ifeq ($(KBUILD_SYM32), y)
305 cflags-$(KBUILD_SYM32) += -msym32 -DKBUILD_64BIT_SYM32
306 else
307 ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
308 $(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
309 endif
310 endif
311 endif
312
313 # When linking a 32-bit executable the LLVM linker cannot cope with a
314 # 32-bit load address that has been sign-extended to 64 bits. Simply
315 # remove the upper 32 bits then, as it is safe to do so with other
316 # linkers.
317 ifdef CONFIG_64BIT
318 load-ld = $(load-y)
319 else
320 load-ld = $(subst 0xffffffff,0x,$(load-y))
321 endif
322
323 KBUILD_AFLAGS += $(cflags-y)
324 KBUILD_CFLAGS += $(cflags-y)
325 KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y) -DLINKER_LOAD_ADDRESS=$(load-ld)
326 KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
327
328 bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y) \
329 LINKER_LOAD_ADDRESS=$(load-ld) \
330 VMLINUX_ENTRY_ADDRESS=$(entry-y) \
331 PLATFORM="$(platform-y)" \
332 ITS_INPUTS="$(its-y)"
333 ifdef CONFIG_32BIT
334 bootvars-y += ADDR_BITS=32
335 endif
336 ifdef CONFIG_64BIT
337 bootvars-y += ADDR_BITS=64
338 endif
339
340 # This is required to get dwarf unwinding tables into .debug_frame
341 # instead of .eh_frame so we don't discard them.
342 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
343
344 KBUILD_LDFLAGS += -m $(ld-emul)
345
346 ifdef need-compiler
347 CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
348 grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
349 sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
350 endif
351
352 OBJCOPYFLAGS += --remove-section=.reginfo
353
354 libs-y += arch/mips/lib/
355 libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/
356
357 drivers-y += arch/mips/crypto/
358
359 # suspend and hibernation support
360 drivers-$(CONFIG_PM) += arch/mips/power/
361
362 # boot image targets (arch/mips/boot/)
363 boot-y := vmlinux.bin
364 boot-y += vmlinux.ecoff
365 boot-y += vmlinux.srec
366 boot-y += uImage
367 boot-y += uImage.bin
368 boot-y += uImage.bz2
369 boot-y += uImage.gz
370 boot-y += uImage.lzma
371 boot-y += uImage.lzo
372 boot-y += vmlinux.itb
373 boot-y += vmlinux.gz.itb
374 boot-y += vmlinux.bz2.itb
375 boot-y += vmlinux.lzma.itb
376 boot-y += vmlinux.lzo.itb
377
378 # compressed boot image targets (arch/mips/boot/compressed/)
379 bootz-y := vmlinuz
380 bootz-y += vmlinuz.bin
381 bootz-y += vmlinuz.ecoff
382 bootz-y += vmlinuz.srec
383 bootz-y += uzImage.bin
384 bootz-y += vmlinuz.itb
385
386 #
387 # Some machines like the Indy need 32-bit ELF binaries for booting purposes.
388 # Other need ECOFF, so we build a 32-bit ELF binary for them which we then
389 # convert to ECOFF using elf2ecoff.
390 #
391 quiet_cmd_32 = OBJCOPY $@
392 cmd_32 = $(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
393 vmlinux.32: vmlinux
394 $(call cmd,32)
395
396 #
397 # The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
398 # ELF files from 32-bit files by conversion.
399 #
400 quiet_cmd_64 = OBJCOPY $@
401 cmd_64 = $(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
402 vmlinux.64: vmlinux
403 $(call cmd,64)
404
405 all: $(all-y) $(KBUILD_DTBS)
406
407 # boot
408 $(boot-y): $(vmlinux-32) FORCE
409 $(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) \
410 $(bootvars-y) arch/mips/boot/$@
411
412 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
413 # boot/compressed
414 $(bootz-y): $(vmlinux-32) FORCE
415 $(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
416 $(bootvars-y) 32bit-bfd=$(32bit-bfd) arch/mips/boot/$@
417 else
418 vmlinuz: FORCE
419 @echo ' CONFIG_SYS_SUPPORTS_ZBOOT is not enabled'
420 /bin/false
421 endif
422
423
424 CLEAN_FILES += vmlinux.32 vmlinux.64
425
426 # device-trees
427 core-y += arch/mips/boot/dts/
428
429 archprepare:
430 ifdef CONFIG_MIPS32_N32
431 @$(kecho) ' Checking missing-syscalls for N32'
432 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
433 endif
434 ifdef CONFIG_MIPS32_O32
435 @$(kecho) ' Checking missing-syscalls for O32'
436 $(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
437 endif
438
439 install:
440 $(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
441 ifdef CONFIG_SYS_SUPPORTS_ZBOOT
442 $(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
443 endif
444 $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
445 $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
446
447 archheaders:
448 $(Q)$(MAKE) $(build)=arch/mips/kernel/syscalls all
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
468 echo ' These will be default as appropriate for a configured platform.'
469 echo
470 echo ' If you are targeting a system supported by generic kernels you may'
471 echo ' configure the kernel for a given architecture target like so:'
472 echo
473 echo ' {micro32,32,64}{r1,r2,r6}{el,}_defconfig <BOARDS="list of boards">'
474 echo
475 echo ' Where BOARDS is some subset of the following:'
476 for board in $(sort $(BOARDS)); do echo " $${board}"; done
477 echo
478 echo ' Specifically the following generic default configurations are'
479 echo ' supported:'
480 echo
481 $(foreach cfg,$(generic_defconfigs),
482 printf " %-24s - Build generic kernel for $(call describe_generic_defconfig,$(cfg))\n" $(cfg);)
483 echo
484 echo ' The following legacy default configurations have been converted to'
485 echo ' generic and can still be used:'
486 echo
487 $(foreach cfg,$(sort $(legacy_defconfigs)),
488 printf " %-24s - Build $($(cfg)-y)\n" $(cfg);)
489 echo
490 echo ' Otherwise, the following default configurations are available:'
491 endef
492
493 generic_config_dir = $(srctree)/arch/$(ARCH)/configs/generic
494 generic_defconfigs :=
495
496 #
497 # If the user generates a generic kernel configuration without specifying a
498 # list of boards to include the config fragments for, default to including all
499 # available board config fragments.
500 #
501 ifeq ($(BOARDS),)
502 BOARDS = $(patsubst board-%.config,%,$(notdir $(wildcard $(generic_config_dir)/board-*.config)))
503 endif
504
505 #
506 # Generic kernel configurations which merge generic_defconfig with the
507 # appropriate config fragments from arch/mips/configs/generic/, resulting in
508 # the ability to easily configure the kernel for a given architecture,
509 # endianness & set of boards without duplicating the needed configuration in
510 # hundreds of defconfig files.
511 #
512 define gen_generic_defconfigs
513 $(foreach bits,$(1),$(foreach rev,$(2),$(foreach endian,$(3),
514 target := $(bits)$(rev)$(filter el,$(endian))_defconfig
515 generic_defconfigs += $$(target)
516 $$(target): $(generic_config_dir)/$(bits)$(rev).config
517 $$(target): $(generic_config_dir)/$(endian).config
518 )))
519 endef
520
521 $(eval $(call gen_generic_defconfigs,32 64,r1 r2 r6,eb el))
522 $(eval $(call gen_generic_defconfigs,micro32,r2,eb el))
523
524 define describe_generic_defconfig
525 $(subst 32r,MIPS32 r,$(subst 64r,MIPS64 r,$(subst el, little endian,$(patsubst %_defconfig,%,$(1)))))
526 endef
527
528 .PHONY: $(generic_defconfigs)
529 $(generic_defconfigs):
530 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
531 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/generic_defconfig $^ | \
532 grep -Ev '^#'
533 $(Q)cp $(KCONFIG_CONFIG) $(objtree)/.config.$@
534 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig \
535 KCONFIG_CONFIG=$(objtree)/.config.$@ >/dev/null
536 $(Q)$(CONFIG_SHELL) $(srctree)/arch/$(ARCH)/tools/generic-board-config.sh \
537 $(srctree) $(objtree) $(objtree)/.config.$@ $(KCONFIG_CONFIG) \
538 "$(origin BOARDS)" $(BOARDS)
539 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
540
541 #
542 # Prevent generic merge_config rules attempting to merge single fragments
543 #
544 $(generic_config_dir)/%.config: ;
545
546 #
547 # Prevent direct use of generic_defconfig, which is intended to be used as the
548 # basis of the various ISA-specific targets generated above.
549 #
550 .PHONY: generic_defconfig
551 generic_defconfig:
552 $(Q)echo "generic_defconfig is not intended for direct use, but should instead be"
553 $(Q)echo "used via an ISA-specific target from the following list:"
554 $(Q)echo
555 $(Q)for cfg in $(generic_defconfigs); do echo " $${cfg}"; done
556 $(Q)echo
557 $(Q)false
558
559 #
560 # Legacy defconfig compatibility - these targets used to be real defconfigs but
561 # now that the boards have been converted to use the generic kernel they are
562 # wrappers around the generic rules above.
563 #
564 legacy_defconfigs += ocelot_defconfig
565 ocelot_defconfig-y := 32r2el_defconfig BOARDS=ocelot
566
567 legacy_defconfigs += sead3_defconfig
568 sead3_defconfig-y := 32r2el_defconfig BOARDS=sead-3
569
570 legacy_defconfigs += sead3micro_defconfig
571 sead3micro_defconfig-y := micro32r2el_defconfig BOARDS=sead-3
572
573 legacy_defconfigs += xilfpga_defconfig
574 xilfpga_defconfig-y := 32r2el_defconfig BOARDS=xilfpga
575
576 legacy_defconfigs += pistachio_defconfig
577 pistachio_defconfig-y := 32r2el_defconfig BOARDS=marduk
578
579 .PHONY: $(legacy_defconfigs)
580 $(legacy_defconfigs):
581 $(Q)$(MAKE) -f $(srctree)/Makefile $($@-y)
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