7 # Horrible source of confusion. Die, die, die ...
11 mainmenu "Linux/MIPS Kernel Configuration"
13 menu "Machine selection"
23 bool "Alchemy processor based machines"
26 bool "Basler eXcite smart camera"
35 select SYS_HAS_CPU_RM9000
36 select SYS_SUPPORTS_32BIT_KERNEL
37 select SYS_SUPPORTS_BIG_ENDIAN
39 The eXcite is a smart camera platform manufactured by
40 Basler Vision Technologies AG.
43 bool "BCM47XX based boards"
46 select DMA_NONCOHERENT
49 select SYS_HAS_CPU_MIPS32_R1
50 select SYS_SUPPORTS_32BIT_KERNEL
51 select SYS_SUPPORTS_LITTLE_ENDIAN
53 select SSB_DRIVER_MIPS
54 select SSB_DRIVER_EXTIF
55 select SSB_PCICORE_HOSTMODE if PCI
57 select SYS_HAS_EARLY_PRINTK
60 Support for BCM47XX based boards
67 select DMA_NONCOHERENT
73 select PCI_GT64XXX_PCI0
74 select SYS_HAS_CPU_NEVADA
75 select SYS_HAS_EARLY_PRINTK
76 select SYS_SUPPORTS_32BIT_KERNEL
77 select SYS_SUPPORTS_64BIT_KERNEL
78 select SYS_SUPPORTS_LITTLE_ENDIAN
79 select GENERIC_HARDIRQS_NO__DO_IRQ
81 config MACH_DECSTATION
88 select CPU_DADDI_WORKAROUNDS if 64BIT
89 select CPU_R4000_WORKAROUNDS if 64BIT
90 select CPU_R4400_WORKAROUNDS if 64BIT
91 select DMA_NONCOHERENT
94 select SYS_HAS_CPU_R3000
95 select SYS_HAS_CPU_R4X00
96 select SYS_SUPPORTS_32BIT_KERNEL
97 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
98 select SYS_SUPPORTS_LITTLE_ENDIAN
99 select SYS_SUPPORTS_128HZ
100 select SYS_SUPPORTS_256HZ
101 select SYS_SUPPORTS_1024HZ
103 This enables support for DEC's MIPS based workstations. For details
104 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
105 DECstation porting pages on <http://decstation.unix-ag.org/>.
107 If you have one of the following DECstation Models you definitely
108 want to choose R4xx0 for the CPU Type:
115 otherwise choose R3000.
118 bool "Jazz family of machines"
121 select ARCH_MAY_HAVE_PC_FDC
124 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
125 select GENERIC_ISA_DMA
130 select SYS_HAS_CPU_R4X00
131 select SYS_SUPPORTS_32BIT_KERNEL
132 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
133 select SYS_SUPPORTS_100HZ
134 select GENERIC_HARDIRQS_NO__DO_IRQ
136 This a family of machines based on the MIPS R4030 chipset which was
137 used by several vendors to build RISC/os and Windows NT workstations.
138 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millenium and
139 Olivetti M700-10 workstations.
142 bool "LASAT Networks platforms"
145 select DMA_NONCOHERENT
146 select SYS_HAS_EARLY_PRINTK
149 select PCI_GT64XXX_PCI0
151 select R5000_CPU_SCACHE
152 select SYS_HAS_CPU_R5000
153 select SYS_SUPPORTS_32BIT_KERNEL
154 select SYS_SUPPORTS_64BIT_KERNEL if BROKEN
155 select SYS_SUPPORTS_LITTLE_ENDIAN
156 select GENERIC_HARDIRQS_NO__DO_IRQ
159 bool "Lemote Fulong mini-PC"
160 select ARCH_SPARSEMEM_ENABLE
163 select SYS_HAS_CPU_LOONGSON2
164 select DMA_NONCOHERENT
167 select HAVE_STD_PC_SERIAL_PORT
172 select SYS_SUPPORTS_32BIT_KERNEL
173 select SYS_SUPPORTS_64BIT_KERNEL
174 select SYS_SUPPORTS_LITTLE_ENDIAN
175 select SYS_SUPPORTS_HIGHMEM
176 select SYS_HAS_EARLY_PRINTK
177 select GENERIC_HARDIRQS_NO__DO_IRQ
178 select GENERIC_ISA_DMA_SUPPORT_BROKEN
181 Lemote Fulong mini-PC board based on the Chinese Loongson-2E CPU and
185 bool "MIPS Malta board"
186 select ARCH_MAY_HAVE_PC_FDC
191 select DMA_NONCOHERENT
192 select GENERIC_ISA_DMA
198 select MIPS_BOARDS_GEN
200 select MIPS_CPU_SCACHE
201 select PCI_GT64XXX_PCI0
204 select SYS_HAS_CPU_MIPS32_R1
205 select SYS_HAS_CPU_MIPS32_R2
206 select SYS_HAS_CPU_MIPS64_R1
207 select SYS_HAS_CPU_NEVADA
208 select SYS_HAS_CPU_RM7000
209 select SYS_HAS_EARLY_PRINTK
210 select SYS_SUPPORTS_32BIT_KERNEL
211 select SYS_SUPPORTS_64BIT_KERNEL
212 select SYS_SUPPORTS_BIG_ENDIAN
213 select SYS_SUPPORTS_LITTLE_ENDIAN
214 select SYS_SUPPORTS_MIPS_CMP if BROKEN # because SYNC_R4K is broken
215 select SYS_SUPPORTS_MULTITHREADING
216 select SYS_SUPPORTS_SMARTMIPS
218 This enables support for the MIPS Technologies Malta evaluation
222 bool 'MIPS simulator (MIPSsim)'
225 select DMA_NONCOHERENT
226 select SYS_HAS_EARLY_PRINTK
229 select SYS_HAS_CPU_MIPS32_R1
230 select SYS_HAS_CPU_MIPS32_R2
231 select SYS_HAS_EARLY_PRINTK
232 select SYS_SUPPORTS_32BIT_KERNEL
233 select SYS_SUPPORTS_BIG_ENDIAN
234 select SYS_SUPPORTS_MULTITHREADING
235 select SYS_SUPPORTS_LITTLE_ENDIAN
237 This option enables support for MIPS Technologies MIPSsim software
241 bool "NEC EMMA2RH Mark-eins"
244 select DMA_NONCOHERENT
248 select SYS_SUPPORTS_32BIT_KERNEL
249 select SYS_SUPPORTS_BIG_ENDIAN
250 select SYS_SUPPORTS_LITTLE_ENDIAN
251 select SYS_HAS_CPU_R5000
253 This enables support for the R5432-based NEC Mark-eins
254 boards with R5500 CPU.
257 bool "NEC VR4100 series based machines"
260 select SYS_HAS_CPU_VR41XX
261 select GENERIC_HARDIRQS_NO__DO_IRQ
264 bool "NXP PNX8550 based JBS board"
266 select SYS_SUPPORTS_LITTLE_ENDIAN
268 config PNX8550_STB810
269 bool "NXP PNX8550 based STB810 board"
271 select SYS_SUPPORTS_LITTLE_ENDIAN
274 bool "PMC-Sierra MSP chipsets"
275 depends on EXPERIMENTAL
276 select DMA_NONCOHERENT
278 select NO_EXCEPT_FILL
280 select SYS_HAS_CPU_MIPS32_R1
281 select SYS_HAS_CPU_MIPS32_R2
282 select SYS_SUPPORTS_32BIT_KERNEL
283 select SYS_SUPPORTS_BIG_ENDIAN
286 select SERIAL_8250_CONSOLE
288 This adds support for the PMC-Sierra family of Multi-Service
289 Processor System-On-A-Chips. These parts include a number
290 of integrated peripherals, interfaces and DSPs in addition to
291 a variety of MIPS cores.
294 bool "PMC-Sierra Yosemite eval board"
303 select SYS_HAS_CPU_RM9000
304 select SYS_HAS_EARLY_PRINTK
305 select SYS_SUPPORTS_32BIT_KERNEL
306 select SYS_SUPPORTS_64BIT_KERNEL
307 select SYS_SUPPORTS_BIG_ENDIAN
308 select SYS_SUPPORTS_HIGHMEM
309 select SYS_SUPPORTS_SMP
311 Yosemite is an evaluation board for the RM9000x2 processor
312 manufactured by PMC-Sierra.
315 bool "SGI IP22 (Indy/Indigo2)"
321 select DEFAULT_SGI_PARTITION
322 select DMA_NONCOHERENT
326 select IP22_CPU_SCACHE
328 select GENERIC_ISA_DMA_SUPPORT_BROKEN
329 select SGI_HAS_DS1286
331 select SGI_HAS_INDYDOG
337 select SYS_HAS_CPU_R4X00
338 select SYS_HAS_CPU_R5000
339 select SYS_HAS_EARLY_PRINTK
340 select SYS_SUPPORTS_32BIT_KERNEL
341 select SYS_SUPPORTS_64BIT_KERNEL
342 select SYS_SUPPORTS_BIG_ENDIAN
344 This are the SGI Indy, Challenge S and Indigo2, as well as certain
345 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
346 that runs on these, say Y here.
349 bool "SGI IP27 (Origin200/2000)"
353 select DEFAULT_SGI_PARTITION
355 select SYS_HAS_EARLY_PRINTK
357 select NR_CPUS_DEFAULT_64
358 select SYS_HAS_CPU_R10000
359 select SYS_SUPPORTS_64BIT_KERNEL
360 select SYS_SUPPORTS_BIG_ENDIAN
361 select SYS_SUPPORTS_NUMA
362 select SYS_SUPPORTS_SMP
363 select GENERIC_HARDIRQS_NO__DO_IRQ
365 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
366 workstations. To compile a Linux kernel that runs on these, say Y
370 bool "SGI IP28 (Indigo2 R10k) (EXPERIMENTAL)"
371 depends on EXPERIMENTAL
377 select DEFAULT_SGI_PARTITION
378 select DMA_NONCOHERENT
379 select GENERIC_ISA_DMA_SUPPORT_BROKEN
384 select SGI_HAS_DS1286
386 select SGI_HAS_INDYDOG
392 select SYS_HAS_CPU_R10000
393 select SYS_HAS_EARLY_PRINTK
394 select SYS_SUPPORTS_64BIT_KERNEL
395 select SYS_SUPPORTS_BIG_ENDIAN
397 This is the SGI Indigo2 with R10000 processor. To compile a Linux
398 kernel that runs on these, say Y here.
407 select DMA_NONCOHERENT
410 select R5000_CPU_SCACHE
411 select RM7000_CPU_SCACHE
412 select SYS_HAS_CPU_R5000
413 select SYS_HAS_CPU_R10000 if BROKEN
414 select SYS_HAS_CPU_RM7000
415 select SYS_HAS_CPU_NEVADA
416 select SYS_SUPPORTS_64BIT_KERNEL
417 select SYS_SUPPORTS_BIG_ENDIAN
419 If you want this kernel to run on SGI O2 workstation, say Y here.
422 bool "Sibyte BCM91120C-CRhine"
423 depends on EXPERIMENTAL
426 select SIBYTE_BCM1120
428 select SYS_HAS_CPU_SB1
429 select SYS_SUPPORTS_BIG_ENDIAN
430 select SYS_SUPPORTS_LITTLE_ENDIAN
433 bool "Sibyte BCM91120x-Carmel"
434 depends on EXPERIMENTAL
437 select SIBYTE_BCM1120
439 select SYS_HAS_CPU_SB1
440 select SYS_SUPPORTS_BIG_ENDIAN
441 select SYS_SUPPORTS_LITTLE_ENDIAN
444 bool "Sibyte BCM91125C-CRhone"
445 depends on EXPERIMENTAL
448 select SIBYTE_BCM1125
450 select SYS_HAS_CPU_SB1
451 select SYS_SUPPORTS_BIG_ENDIAN
452 select SYS_SUPPORTS_HIGHMEM
453 select SYS_SUPPORTS_LITTLE_ENDIAN
456 bool "Sibyte BCM91125E-Rhone"
457 depends on EXPERIMENTAL
460 select SIBYTE_BCM1125H
462 select SYS_HAS_CPU_SB1
463 select SYS_SUPPORTS_BIG_ENDIAN
464 select SYS_SUPPORTS_LITTLE_ENDIAN
467 bool "Sibyte BCM91250A-SWARM"
470 select NR_CPUS_DEFAULT_2
473 select SYS_HAS_CPU_SB1
474 select SYS_SUPPORTS_BIG_ENDIAN
475 select SYS_SUPPORTS_HIGHMEM
476 select SYS_SUPPORTS_LITTLE_ENDIAN
477 select ZONE_DMA32 if 64BIT
479 config SIBYTE_LITTLESUR
480 bool "Sibyte BCM91250C2-LittleSur"
481 depends on EXPERIMENTAL
484 select NR_CPUS_DEFAULT_2
487 select SYS_HAS_CPU_SB1
488 select SYS_SUPPORTS_BIG_ENDIAN
489 select SYS_SUPPORTS_HIGHMEM
490 select SYS_SUPPORTS_LITTLE_ENDIAN
492 config SIBYTE_SENTOSA
493 bool "Sibyte BCM91250E-Sentosa"
494 depends on EXPERIMENTAL
497 select NR_CPUS_DEFAULT_2
500 select SYS_HAS_CPU_SB1
501 select SYS_SUPPORTS_BIG_ENDIAN
502 select SYS_SUPPORTS_LITTLE_ENDIAN
505 bool "Sibyte BCM91480B-BigSur"
508 select NR_CPUS_DEFAULT_4
509 select SIBYTE_BCM1x80
511 select SYS_HAS_CPU_SB1
512 select SYS_SUPPORTS_BIG_ENDIAN
513 select SYS_SUPPORTS_HIGHMEM
514 select SYS_SUPPORTS_LITTLE_ENDIAN
515 select ZONE_DMA32 if 64BIT
518 bool "SNI RM200/300/400"
519 select ARC if CPU_LITTLE_ENDIAN
520 select ARC32 if CPU_LITTLE_ENDIAN
521 select SNIPROM if CPU_BIG_ENDIAN
522 select ARCH_MAY_HAVE_PC_FDC
526 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
527 select DMA_NONCOHERENT
528 select GENERIC_ISA_DMA
535 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
536 select SYS_HAS_CPU_R4X00
537 select SYS_HAS_CPU_R5000
538 select SYS_HAS_CPU_R10000
539 select R5000_CPU_SCACHE
540 select SYS_HAS_EARLY_PRINTK
541 select SYS_SUPPORTS_32BIT_KERNEL
542 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
543 select SYS_SUPPORTS_BIG_ENDIAN
544 select SYS_SUPPORTS_HIGHMEM
545 select SYS_SUPPORTS_LITTLE_ENDIAN
547 The SNI RM200/300/400 are MIPS-based machines manufactured by
548 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
549 Technology and now in turn merged with Fujitsu. Say Y here to
550 support this machine type.
553 bool "Toshiba TX39 series based machines"
556 bool "Toshiba TX49 series based machines"
558 config MIKROTIK_RB532
559 bool "Mikrotik RB532 boards"
562 select DMA_NONCOHERENT
563 select GENERIC_HARDIRQS_NO__DO_IRQ
566 select SYS_HAS_CPU_MIPS32_R1
567 select SYS_SUPPORTS_32BIT_KERNEL
568 select SYS_SUPPORTS_LITTLE_ENDIAN
571 select ARCH_REQUIRE_GPIOLIB
573 Support the Mikrotik(tm) RouterBoard 532 series,
574 based on the IDT RC32434 SoC.
577 bool "Wind River PPMC board"
582 select DMA_NONCOHERENT
584 select PCI_GT64XXX_PCI0
586 select SYS_HAS_CPU_MIPS32_R1
587 select SYS_HAS_CPU_MIPS32_R2
588 select SYS_HAS_CPU_MIPS64_R1
589 select SYS_HAS_CPU_NEVADA
590 select SYS_HAS_CPU_RM7000
591 select SYS_SUPPORTS_32BIT_KERNEL
592 select SYS_SUPPORTS_64BIT_KERNEL
593 select SYS_SUPPORTS_BIG_ENDIAN
594 select SYS_SUPPORTS_LITTLE_ENDIAN
596 This enables support for the Wind River MIPS32 4KC PPMC evaluation
597 board, which is based on GT64120 bridge chip.
601 source "arch/mips/alchemy/Kconfig"
602 source "arch/mips/basler/excite/Kconfig"
603 source "arch/mips/jazz/Kconfig"
604 source "arch/mips/lasat/Kconfig"
605 source "arch/mips/pmc-sierra/Kconfig"
606 source "arch/mips/sgi-ip27/Kconfig"
607 source "arch/mips/sibyte/Kconfig"
608 source "arch/mips/txx9/Kconfig"
609 source "arch/mips/vr41xx/Kconfig"
613 config RWSEM_GENERIC_SPINLOCK
617 config RWSEM_XCHGADD_ALGORITHM
620 config ARCH_HAS_ILOG2_U32
624 config ARCH_HAS_ILOG2_U64
628 config ARCH_SUPPORTS_OPROFILE
630 default y if !MIPS_MT_SMTC
632 config GENERIC_FIND_NEXT_BIT
636 config GENERIC_HWEIGHT
640 config GENERIC_CALIBRATE_DELAY
644 config GENERIC_CLOCKEVENTS
652 config GENERIC_CMOS_UPDATE
656 config SCHED_NO_NO_OMIT_FRAME_POINTER
660 config GENERIC_HARDIRQS_NO__DO_IRQ
665 # Select some configuration options automatically based on user selections.
670 config ARCH_MAY_HAVE_PC_FDC
708 select ARCH_REQUIRE_GPIOLIB
720 config DMA_NONCOHERENT
722 select DMA_NEED_PCI_MAP_STATE
724 config DMA_NEED_PCI_MAP_STATE
728 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
729 depends on SYS_HAS_EARLY_PRINTK
732 This option enables special console drivers which allow the kernel
733 to print messages very early in the bootup process.
735 This is useful for kernel debugging when your machine crashes very
736 early before the console code is initialized. For normal operation,
737 it is not recommended because it looks ugly on some machines and
738 doesn't cooperate with an X server. You should normally say N here,
739 unless you want to debug such a crash.
741 config SYS_HAS_EARLY_PRINTK
760 config MIPS_DISABLE_OBSOLETE_IDE
769 config GENERIC_ISA_DMA
771 select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
773 config GENERIC_ISA_DMA_SUPPORT_BROKEN
775 select GENERIC_ISA_DMA
781 # Endianess selection. Sufficiently obscure so many users don't know what to
782 # answer,so we try hard to limit the available choices. Also the use of a
783 # choice statement should be more obvious to the user.
786 prompt "Endianess selection"
788 Some MIPS machines can be configured for either little or big endian
789 byte order. These modes require different kernels and a different
790 Linux distribution. In general there is one preferred byteorder for a
791 particular system but some systems are just as commonly used in the
792 one or the other endianness.
794 config CPU_BIG_ENDIAN
796 depends on SYS_SUPPORTS_BIG_ENDIAN
798 config CPU_LITTLE_ENDIAN
800 depends on SYS_SUPPORTS_LITTLE_ENDIAN
805 config SYS_SUPPORTS_APM_EMULATION
808 config SYS_SUPPORTS_BIG_ENDIAN
811 config SYS_SUPPORTS_LITTLE_ENDIAN
838 config MIPS_BOARDS_GEN
841 config PCI_GT64XXX_PCI0
844 config NO_EXCEPT_FILL
857 select DMA_NONCOHERENT
859 select SYS_HAS_CPU_MIPS32_R1
860 select SYS_HAS_EARLY_PRINTK
861 select SYS_SUPPORTS_32BIT_KERNEL
862 select GENERIC_HARDIRQS_NO__DO_IRQ
876 config SGI_HAS_DS1286
879 config SGI_HAS_INDYDOG
897 config DEFAULT_SGI_PARTITION
909 config MIPS_L1_CACHE_SHIFT
911 default "4" if MACH_DECSTATION || MIKROTIK_RB532
912 default "7" if SGI_IP22 || SGI_IP27 || SGI_IP28 || SNI_RM
913 default "4" if PMC_MSP4200_EVAL
916 config HAVE_STD_PC_SERIAL_PORT
920 bool "ARC console support"
921 depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
925 depends on MACH_JAZZ || SNI_RM || SGI_IP32
930 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP28 || SGI_IP32
947 depends on SYS_HAS_CPU_LOONGSON2
948 select CPU_SUPPORTS_32BIT_KERNEL
949 select CPU_SUPPORTS_64BIT_KERNEL
950 select CPU_SUPPORTS_HIGHMEM
952 The Loongson 2E processor implements the MIPS III instruction set
953 with many extensions.
956 bool "MIPS32 Release 1"
957 depends on SYS_HAS_CPU_MIPS32_R1
959 select CPU_HAS_PREFETCH
960 select CPU_SUPPORTS_32BIT_KERNEL
961 select CPU_SUPPORTS_HIGHMEM
963 Choose this option to build a kernel for release 1 or later of the
964 MIPS32 architecture. Most modern embedded systems with a 32-bit
965 MIPS processor are based on a MIPS32 processor. If you know the
966 specific type of processor in your system, choose those that one
967 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
968 Release 2 of the MIPS32 architecture is available since several
969 years so chances are you even have a MIPS32 Release 2 processor
970 in which case you should choose CPU_MIPS32_R2 instead for better
974 bool "MIPS32 Release 2"
975 depends on SYS_HAS_CPU_MIPS32_R2
977 select CPU_HAS_PREFETCH
978 select CPU_SUPPORTS_32BIT_KERNEL
979 select CPU_SUPPORTS_HIGHMEM
981 Choose this option to build a kernel for release 2 or later of the
982 MIPS32 architecture. Most modern embedded systems with a 32-bit
983 MIPS processor are based on a MIPS32 processor. If you know the
984 specific type of processor in your system, choose those that one
985 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
988 bool "MIPS64 Release 1"
989 depends on SYS_HAS_CPU_MIPS64_R1
991 select CPU_HAS_PREFETCH
992 select CPU_SUPPORTS_32BIT_KERNEL
993 select CPU_SUPPORTS_64BIT_KERNEL
994 select CPU_SUPPORTS_HIGHMEM
996 Choose this option to build a kernel for release 1 or later of the
997 MIPS64 architecture. Many modern embedded systems with a 64-bit
998 MIPS processor are based on a MIPS64 processor. If you know the
999 specific type of processor in your system, choose those that one
1000 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1001 Release 2 of the MIPS64 architecture is available since several
1002 years so chances are you even have a MIPS64 Release 2 processor
1003 in which case you should choose CPU_MIPS64_R2 instead for better
1006 config CPU_MIPS64_R2
1007 bool "MIPS64 Release 2"
1008 depends on SYS_HAS_CPU_MIPS64_R2
1010 select CPU_HAS_PREFETCH
1011 select CPU_SUPPORTS_32BIT_KERNEL
1012 select CPU_SUPPORTS_64BIT_KERNEL
1013 select CPU_SUPPORTS_HIGHMEM
1015 Choose this option to build a kernel for release 2 or later of the
1016 MIPS64 architecture. Many modern embedded systems with a 64-bit
1017 MIPS processor are based on a MIPS64 processor. If you know the
1018 specific type of processor in your system, choose those that one
1019 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1023 depends on SYS_HAS_CPU_R3000
1025 select CPU_SUPPORTS_32BIT_KERNEL
1026 select CPU_SUPPORTS_HIGHMEM
1028 Please make sure to pick the right CPU type. Linux/MIPS is not
1029 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
1030 *not* work on R4000 machines and vice versa. However, since most
1031 of the supported machines have an R4000 (or similar) CPU, R4x00
1032 might be a safe bet. If the resulting kernel does not work,
1033 try to recompile with R3000.
1037 depends on SYS_HAS_CPU_TX39XX
1038 select CPU_SUPPORTS_32BIT_KERNEL
1042 depends on SYS_HAS_CPU_VR41XX
1043 select CPU_SUPPORTS_32BIT_KERNEL
1044 select CPU_SUPPORTS_64BIT_KERNEL
1046 The options selects support for the NEC VR4100 series of processors.
1047 Only choose this option if you have one of these processors as a
1048 kernel built with this option will not run on any other type of
1049 processor or vice versa.
1053 depends on SYS_HAS_CPU_R4300
1055 select CPU_SUPPORTS_32BIT_KERNEL
1056 select CPU_SUPPORTS_64BIT_KERNEL
1058 MIPS Technologies R4300-series processors.
1062 depends on SYS_HAS_CPU_R4X00
1064 select CPU_SUPPORTS_32BIT_KERNEL
1065 select CPU_SUPPORTS_64BIT_KERNEL
1067 MIPS Technologies R4000-series processors other than 4300, including
1068 the R4000, R4400, R4600, and 4700.
1072 depends on SYS_HAS_CPU_TX49XX
1074 select CPU_HAS_PREFETCH
1075 select CPU_SUPPORTS_32BIT_KERNEL
1076 select CPU_SUPPORTS_64BIT_KERNEL
1080 depends on SYS_HAS_CPU_R5000
1082 select CPU_SUPPORTS_32BIT_KERNEL
1083 select CPU_SUPPORTS_64BIT_KERNEL
1085 MIPS Technologies R5000-series processors other than the Nevada.
1089 depends on SYS_HAS_CPU_R5432
1091 select CPU_SUPPORTS_32BIT_KERNEL
1092 select CPU_SUPPORTS_64BIT_KERNEL
1096 depends on EXPERIMENTAL
1098 depends on SYS_HAS_CPU_R6000
1099 select CPU_SUPPORTS_32BIT_KERNEL
1101 MIPS Technologies R6000 and R6000A series processors. Note these
1102 processors are extremely rare and the support for them is incomplete.
1106 depends on SYS_HAS_CPU_NEVADA
1108 select CPU_SUPPORTS_32BIT_KERNEL
1109 select CPU_SUPPORTS_64BIT_KERNEL
1111 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1115 depends on EXPERIMENTAL
1116 depends on SYS_HAS_CPU_R8000
1118 select CPU_HAS_PREFETCH
1119 select CPU_SUPPORTS_64BIT_KERNEL
1121 MIPS Technologies R8000 processors. Note these processors are
1122 uncommon and the support for them is incomplete.
1126 depends on SYS_HAS_CPU_R10000
1128 select CPU_HAS_PREFETCH
1129 select CPU_SUPPORTS_32BIT_KERNEL
1130 select CPU_SUPPORTS_64BIT_KERNEL
1131 select CPU_SUPPORTS_HIGHMEM
1133 MIPS Technologies R10000-series processors.
1137 depends on SYS_HAS_CPU_RM7000
1139 select CPU_HAS_PREFETCH
1140 select CPU_SUPPORTS_32BIT_KERNEL
1141 select CPU_SUPPORTS_64BIT_KERNEL
1142 select CPU_SUPPORTS_HIGHMEM
1146 depends on SYS_HAS_CPU_RM9000
1148 select CPU_HAS_PREFETCH
1149 select CPU_SUPPORTS_32BIT_KERNEL
1150 select CPU_SUPPORTS_64BIT_KERNEL
1151 select CPU_SUPPORTS_HIGHMEM
1152 select WEAK_ORDERING
1156 depends on SYS_HAS_CPU_SB1
1158 select CPU_SUPPORTS_32BIT_KERNEL
1159 select CPU_SUPPORTS_64BIT_KERNEL
1160 select CPU_SUPPORTS_HIGHMEM
1161 select WEAK_ORDERING
1165 config SYS_HAS_CPU_LOONGSON2
1168 config SYS_HAS_CPU_MIPS32_R1
1171 config SYS_HAS_CPU_MIPS32_R2
1174 config SYS_HAS_CPU_MIPS64_R1
1177 config SYS_HAS_CPU_MIPS64_R2
1180 config SYS_HAS_CPU_R3000
1183 config SYS_HAS_CPU_TX39XX
1186 config SYS_HAS_CPU_VR41XX
1189 config SYS_HAS_CPU_R4300
1192 config SYS_HAS_CPU_R4X00
1195 config SYS_HAS_CPU_TX49XX
1198 config SYS_HAS_CPU_R5000
1201 config SYS_HAS_CPU_R5432
1204 config SYS_HAS_CPU_R6000
1207 config SYS_HAS_CPU_NEVADA
1210 config SYS_HAS_CPU_R8000
1213 config SYS_HAS_CPU_R10000
1216 config SYS_HAS_CPU_RM7000
1219 config SYS_HAS_CPU_RM9000
1222 config SYS_HAS_CPU_SB1
1226 # CPU may reorder R->R, R->W, W->R, W->W
1227 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1229 config WEAK_ORDERING
1233 # CPU may reorder reads and writes beyond LL/SC
1234 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1236 config WEAK_REORDERING_BEYOND_LLSC
1241 # These two indicate any level of the MIPS32 and MIPS64 architecture
1245 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1249 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1252 # These two indicate the revision of the architecture, either Release 1 or Release 2
1256 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1260 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2
1262 config SYS_SUPPORTS_32BIT_KERNEL
1264 config SYS_SUPPORTS_64BIT_KERNEL
1266 config CPU_SUPPORTS_32BIT_KERNEL
1268 config CPU_SUPPORTS_64BIT_KERNEL
1275 prompt "Kernel code model"
1277 You should only select this option if you have a workload that
1278 actually benefits from 64-bit processing or if your machine has
1279 large memory. You will only be presented a single option in this
1280 menu if your system does not support both 32-bit and 64-bit kernels.
1283 bool "32-bit kernel"
1284 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1287 Select this option if you want to build a 32-bit kernel.
1289 bool "64-bit kernel"
1290 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1292 Select this option if you want to build a 64-bit kernel.
1297 prompt "Kernel page size"
1298 default PAGE_SIZE_4KB
1300 config PAGE_SIZE_4KB
1303 This option select the standard 4kB Linux page size. On some
1304 R3000-family processors this is the only available page size. Using
1305 4kB page size will minimize memory consumption and is therefore
1306 recommended for low memory systems.
1308 config PAGE_SIZE_8KB
1310 depends on EXPERIMENTAL && CPU_R8000
1312 Using 8kB page size will result in higher performance kernel at
1313 the price of higher memory consumption. This option is available
1314 only on the R8000 processor. Not that at the time of this writing
1315 this option is still high experimental; there are also issues with
1316 compatibility of user applications.
1318 config PAGE_SIZE_16KB
1320 depends on !CPU_R3000 && !CPU_TX39XX
1322 Using 16kB page size will result in higher performance kernel at
1323 the price of higher memory consumption. This option is available on
1324 all non-R3000 family processors. Note that you will need a suitable
1325 Linux distribution to support this.
1327 config PAGE_SIZE_64KB
1329 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1331 Using 64kB page size will result in higher performance kernel at
1332 the price of higher memory consumption. This option is available on
1333 all non-R3000 family processor. Not that at the time of this
1334 writing this option is still high experimental.
1341 config IP22_CPU_SCACHE
1346 # Support for a MIPS32 / MIPS64 style S-caches
1348 config MIPS_CPU_SCACHE
1352 config R5000_CPU_SCACHE
1356 config RM7000_CPU_SCACHE
1360 config SIBYTE_DMA_PAGEOPS
1361 bool "Use DMA to clear/copy pages"
1364 Instead of using the CPU to zero and copy pages, use a Data Mover
1365 channel. These DMA channels are otherwise unused by the standard
1366 SiByte Linux port. Seems to give a small performance benefit.
1368 config CPU_HAS_PREFETCH
1372 prompt "MIPS MT options"
1374 config MIPS_MT_DISABLED
1375 bool "Disable multithreading support."
1377 Use this option if your workload can't take advantage of
1378 MIPS hardware multithreading support. On systems that don't have
1379 the option of an MT-enabled processor this option will be the only
1380 option in this menu.
1383 bool "Use 1 TC on each available VPE for SMP"
1384 depends on SYS_SUPPORTS_MULTITHREADING
1385 select CPU_MIPSR2_IRQ_VI
1386 select CPU_MIPSR2_IRQ_EI
1388 select NR_CPUS_DEFAULT_2
1390 select SYS_SUPPORTS_SCHED_SMT if SMP
1391 select SYS_SUPPORTS_SMP
1394 This is a kernel model which is also known a VSMP or lately
1395 has been marketesed into SMVP.
1398 bool "SMTC: Use all TCs on all VPEs for SMP"
1399 depends on CPU_MIPS32_R2
1400 #depends on CPU_MIPS64_R2 # once there is hardware ...
1401 depends on SYS_SUPPORTS_MULTITHREADING
1402 select CPU_MIPSR2_IRQ_VI
1403 select CPU_MIPSR2_IRQ_EI
1405 select NR_CPUS_DEFAULT_8
1407 select SYS_SUPPORTS_SMP
1410 This is a kernel model which is known a SMTC or lately has been
1411 marketesed into SMVP.
1419 bool "SMT (multithreading) scheduler support"
1420 depends on SYS_SUPPORTS_SCHED_SMT
1423 SMT scheduler support improves the CPU scheduler's decision making
1424 when dealing with MIPS MT enabled cores at a cost of slightly
1425 increased overhead in some places. If unsure say N here.
1427 config SYS_SUPPORTS_SCHED_SMT
1431 config SYS_SUPPORTS_MULTITHREADING
1434 config MIPS_MT_FPAFF
1435 bool "Dynamic FPU affinity for FP-intensive threads"
1437 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1439 config MIPS_VPE_LOADER
1440 bool "VPE loader support."
1441 depends on SYS_SUPPORTS_MULTITHREADING
1442 select CPU_MIPSR2_IRQ_VI
1443 select CPU_MIPSR2_IRQ_EI
1446 Includes a loader for loading an elf relocatable object
1447 onto another VPE and running it.
1449 config MIPS_MT_SMTC_IM_BACKSTOP
1450 bool "Use per-TC register bits as backstop for inhibited IM bits"
1451 depends on MIPS_MT_SMTC
1454 To support multiple TC microthreads acting as "CPUs" within
1455 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1456 during interrupt handling. To support legacy drivers and interrupt
1457 controller management code, SMTC has a "backstop" to track and
1458 if necessary restore the interrupt mask. This has some performance
1459 impact on interrupt service overhead.
1461 config MIPS_MT_SMTC_IRQAFF
1462 bool "Support IRQ affinity API"
1463 depends on MIPS_MT_SMTC
1466 Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.)
1467 for SMTC Linux kernel. Requires platform support, of which
1468 an example can be found in the MIPS kernel i8259 and Malta
1469 platform code. Adds some overhead to interrupt dispatch, and
1470 should be used only if you know what you are doing.
1472 config MIPS_VPE_LOADER_TOM
1473 bool "Load VPE program into memory hidden from linux"
1474 depends on MIPS_VPE_LOADER
1477 The loader can use memory that is present but has been hidden from
1478 Linux using the kernel command line option "mem=xxMB". It's up to
1479 you to ensure the amount you put in the option and the space your
1480 program requires is less or equal to the amount physically present.
1482 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1483 config MIPS_VPE_APSP_API
1484 bool "Enable support for AP/SP API (RTLX)"
1485 depends on MIPS_VPE_LOADER
1488 config MIPS_APSP_KSPD
1490 depends on MIPS_VPE_APSP_API
1493 KSPD is a kernel daemon that accepts syscall requests from the SP
1494 side, actions them and returns the results. It also handles the
1495 "exit" syscall notifying other kernel modules the SP program is
1496 exiting. You probably want to say yes here.
1499 bool "MIPS CMP framework support"
1500 depends on SYS_SUPPORTS_MIPS_CMP
1501 select SYNC_R4K if BROKEN
1502 select SYS_SUPPORTS_SMP
1503 select SYS_SUPPORTS_SCHED_SMT if SMP
1504 select WEAK_ORDERING
1507 This is a placeholder option for the GCMP work. It will need to
1508 be handled differently...
1510 config SB1_PASS_1_WORKAROUNDS
1512 depends on CPU_SB1_PASS_1
1515 config SB1_PASS_2_WORKAROUNDS
1517 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1520 config SB1_PASS_2_1_WORKAROUNDS
1522 depends on CPU_SB1 && CPU_SB1_PASS_2
1525 config 64BIT_PHYS_ADDR
1531 config CPU_HAS_SMARTMIPS
1532 depends on SYS_SUPPORTS_SMARTMIPS
1533 bool "Support for the SmartMIPS ASE"
1535 SmartMIPS is a extension of the MIPS32 architecture aimed at
1536 increased security at both hardware and software level for
1537 smartcards. Enabling this option will allow proper use of the
1538 SmartMIPS instructions by Linux applications. However a kernel with
1539 this option will not work on a MIPS core without SmartMIPS core. If
1540 you don't know you probably don't have SmartMIPS and should say N
1547 # Vectored interrupt mode is an R2 feature
1549 config CPU_MIPSR2_IRQ_VI
1553 # Extended interrupt mode is an R2 feature
1555 config CPU_MIPSR2_IRQ_EI
1560 depends on !CPU_R3000
1563 config GENERIC_CLOCKEVENTS_BROADCAST
1569 config CPU_DADDI_WORKAROUNDS
1572 config CPU_R4000_WORKAROUNDS
1574 select CPU_R4400_WORKAROUNDS
1576 config CPU_R4400_WORKAROUNDS
1580 # Use the generic interrupt handling code in kernel/irq/:
1582 config GENERIC_HARDIRQS
1586 config GENERIC_IRQ_PROBE
1594 # - Highmem only makes sense for the 32-bit kernel.
1595 # - The current highmem code will only work properly on physically indexed
1596 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1597 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1598 # moment we protect the user and offer the highmem option only on machines
1599 # where it's known to be safe. This will not offer highmem on a few systems
1600 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1601 # indexed CPUs but we're playing safe.
1602 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1603 # know they might have memory configurations that could make use of highmem
1607 bool "High Memory Support"
1608 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1610 config CPU_SUPPORTS_HIGHMEM
1613 config SYS_SUPPORTS_HIGHMEM
1616 config SYS_SUPPORTS_SMARTMIPS
1619 config ARCH_FLATMEM_ENABLE
1623 config ARCH_DISCONTIGMEM_ENABLE
1625 default y if SGI_IP27
1627 Say Y to support efficient handling of discontiguous physical memory,
1628 for architectures which are either NUMA (Non-Uniform Memory Access)
1629 or have huge holes in the physical address space for other reasons.
1630 See <file:Documentation/vm/numa> for more.
1632 config ARCH_POPULATES_NODE_MAP
1635 config ARCH_SPARSEMEM_ENABLE
1637 select SPARSEMEM_STATIC
1641 depends on SYS_SUPPORTS_NUMA
1643 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1644 Access). This option improves performance on systems with more
1645 than two nodes; on two node systems it is generally better to
1646 leave it disabled; on single node systems disable this option
1649 config SYS_SUPPORTS_NUMA
1655 depends on NEED_MULTIPLE_NODES
1660 bool "Multi-Processing support"
1661 depends on SYS_SUPPORTS_SMP
1663 select USE_GENERIC_SMP_HELPERS
1665 This enables support for systems with more than one CPU. If you have
1666 a system with only one CPU, like most personal computers, say N. If
1667 you have a system with more than one CPU, say Y.
1669 If you say N here, the kernel will run on single and multiprocessor
1670 machines, but will use only one CPU of a multiprocessor machine. If
1671 you say Y here, the kernel will run on many, but not all,
1672 singleprocessor machines. On a singleprocessor machine, the kernel
1673 will run faster if you say N here.
1675 People using multiprocessor machines who say Y here should also say
1676 Y to "Enhanced Real Time Clock Support", below.
1678 See also the SMP-HOWTO available at
1679 <http://www.tldp.org/docs.html#howto>.
1681 If you don't know what to do here, say N.
1686 config SYS_SUPPORTS_MIPS_CMP
1689 config SYS_SUPPORTS_SMP
1692 config NR_CPUS_DEFAULT_1
1695 config NR_CPUS_DEFAULT_2
1698 config NR_CPUS_DEFAULT_4
1701 config NR_CPUS_DEFAULT_8
1704 config NR_CPUS_DEFAULT_16
1707 config NR_CPUS_DEFAULT_32
1710 config NR_CPUS_DEFAULT_64
1714 int "Maximum number of CPUs (2-64)"
1715 range 1 64 if NR_CPUS_DEFAULT_1
1717 default "1" if NR_CPUS_DEFAULT_1
1718 default "2" if NR_CPUS_DEFAULT_2
1719 default "4" if NR_CPUS_DEFAULT_4
1720 default "8" if NR_CPUS_DEFAULT_8
1721 default "16" if NR_CPUS_DEFAULT_16
1722 default "32" if NR_CPUS_DEFAULT_32
1723 default "64" if NR_CPUS_DEFAULT_64
1725 This allows you to specify the maximum number of CPUs which this
1726 kernel will support. The maximum supported value is 32 for 32-bit
1727 kernel and 64 for 64-bit kernels; the minimum value which makes
1728 sense is 1 for Qemu (useful only for kernel debugging purposes)
1729 and 2 for all others.
1731 This is purely to save memory - each supported CPU adds
1732 approximately eight kilobytes to the kernel image. For best
1733 performance should round up your number of processors to the next
1736 source "kernel/time/Kconfig"
1739 # Timer Interrupt Frequency Configuration
1743 prompt "Timer frequency"
1746 Allows the configuration of the timer frequency.
1749 bool "48 HZ" if SYS_SUPPORTS_48HZ || SYS_SUPPORTS_ARBIT_HZ
1752 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1755 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1758 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1761 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1764 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1767 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1771 config SYS_SUPPORTS_48HZ
1774 config SYS_SUPPORTS_100HZ
1777 config SYS_SUPPORTS_128HZ
1780 config SYS_SUPPORTS_250HZ
1783 config SYS_SUPPORTS_256HZ
1786 config SYS_SUPPORTS_1000HZ
1789 config SYS_SUPPORTS_1024HZ
1792 config SYS_SUPPORTS_ARBIT_HZ
1794 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1795 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1796 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1797 !SYS_SUPPORTS_1024HZ
1802 default 100 if HZ_100
1803 default 128 if HZ_128
1804 default 250 if HZ_250
1805 default 256 if HZ_256
1806 default 1000 if HZ_1000
1807 default 1024 if HZ_1024
1809 source "kernel/Kconfig.preempt"
1811 config MIPS_INSANE_LARGE
1812 bool "Support for large 64-bit configurations"
1813 depends on CPU_R10000 && 64BIT
1815 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1816 previous 64-bit processors which only supported 40 bit / 1TB. If you
1817 need processes of more than 1TB virtual address space, say Y here.
1818 This will result in additional memory usage, so it is not
1819 recommended for normal users.
1822 bool "Kexec system call (EXPERIMENTAL)"
1823 depends on EXPERIMENTAL
1825 kexec is a system call that implements the ability to shutdown your
1826 current kernel, and to start another kernel. It is like a reboot
1827 but it is independent of the system firmware. And like a reboot
1828 you can start any kernel with it, not just Linux.
1830 The name comes from the similarity to the exec system call.
1832 It is an ongoing process to be certain the hardware in a machine
1833 is properly shutdown, so do not be surprised if this code does not
1834 initially work for you. It may help to enable device hotplugging
1835 support. As of this writing the exact hardware interface is
1836 strongly in flux, so no good recommendation can be made.
1839 bool "Enable seccomp to safely compute untrusted bytecode"
1843 This kernel feature is useful for number crunching applications
1844 that may need to compute untrusted bytecode during their
1845 execution. By using pipes or other transports made available to
1846 the process as file descriptors supporting the read/write
1847 syscalls, it's possible to isolate those applications in
1848 their own address space using seccomp. Once seccomp is
1849 enabled via /proc/<pid>/seccomp, it cannot be disabled
1850 and the task is only allowed to execute a few safe syscalls
1851 defined by each seccomp mode.
1853 If unsure, say Y. Only embedded should say N here.
1857 config RWSEM_GENERIC_SPINLOCK
1861 config LOCKDEP_SUPPORT
1865 config STACKTRACE_SUPPORT
1869 source "init/Kconfig"
1871 config PROBE_INITRD_HEADER
1872 bool "Probe initrd header created by addinitrd"
1873 depends on BLK_DEV_INITRD
1875 Probe initrd header at the last page of kernel image.
1876 Say Y here if you are using arch/mips/boot/addinitrd.c to
1877 add initrd or initramfs image to the kernel image.
1880 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1888 bool "Support for PCI controller"
1889 depends on HW_HAS_PCI
1892 Find out whether you have a PCI motherboard. PCI is the name of a
1893 bus system, i.e. the way the CPU talks to the other stuff inside
1894 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
1900 source "drivers/pci/Kconfig"
1903 # ISA support is now enabled via select. Too many systems still have the one
1904 # or other ISA chip on the board that users don't know about so don't expect
1905 # users to choose the right thing ...
1912 depends on HW_HAS_EISA
1914 select GENERIC_ISA_DMA
1916 The Extended Industry Standard Architecture (EISA) bus was
1917 developed as an open alternative to the IBM MicroChannel bus.
1919 The EISA bus provided some of the features of the IBM MicroChannel
1920 bus while maintaining backward compatibility with cards made for
1921 the older ISA bus. The EISA bus saw limited use between 1988 and
1922 1995 when it was made obsolete by the PCI bus.
1924 Say Y here if you are building a kernel for an EISA-based machine.
1928 source "drivers/eisa/Kconfig"
1931 bool "TURBOchannel support"
1932 depends on MACH_DECSTATION
1934 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
1935 processors. Documentation on writing device drivers for TurboChannel
1937 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
1940 # bool "Access.Bus support"
1953 source "drivers/pcmcia/Kconfig"
1955 source "drivers/pci/hotplug/Kconfig"
1959 menu "Executable file formats"
1961 source "fs/Kconfig.binfmt"
1966 config MIPS32_COMPAT
1967 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
1970 Select this option if you want Linux/MIPS 32-bit binary
1971 compatibility. Since all software available for Linux/MIPS is
1972 currently 32-bit you should say Y here.
1976 depends on MIPS32_COMPAT
1979 config SYSVIPC_COMPAT
1981 depends on COMPAT && SYSVIPC
1985 bool "Kernel support for o32 binaries"
1986 depends on MIPS32_COMPAT
1988 Select this option if you want to run o32 binaries. These are pure
1989 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
1990 existing binaries are in this format.
1995 bool "Kernel support for n32 binaries"
1996 depends on MIPS32_COMPAT
1998 Select this option if you want to run n32 binaries. These are
1999 64-bit binaries using 32-bit quantities for addressing and certain
2000 data that would normally be 64-bit. They are used in special
2007 default y if MIPS32_O32 || MIPS32_N32
2011 menu "Power management options"
2013 config ARCH_SUSPEND_POSSIBLE
2017 source "kernel/power/Kconfig"
2021 source "net/Kconfig"
2023 source "drivers/Kconfig"
2027 source "arch/mips/Kconfig.debug"
2029 source "security/Kconfig"
2031 source "crypto/Kconfig"
2033 source "lib/Kconfig"