6 # Horrible source of confusion. Die, die, die ...
10 mainmenu "Linux/MIPS Kernel Configuration"
12 menu "Machine selection"
22 bool "Alchemy processor based machines"
25 bool "Basler eXcite smart camera"
34 select SYS_HAS_CPU_RM9000
35 select SYS_SUPPORTS_32BIT_KERNEL
36 select SYS_SUPPORTS_BIG_ENDIAN
37 select SYS_SUPPORTS_KGDB
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_MULTITHREADING
215 select SYS_SUPPORTS_SMARTMIPS
217 This enables support for the MIPS Technologies Malta evaluation
221 bool 'MIPS simulator (MIPSsim)'
224 select DMA_NONCOHERENT
225 select SYS_HAS_EARLY_PRINTK
228 select SYS_HAS_CPU_MIPS32_R1
229 select SYS_HAS_CPU_MIPS32_R2
230 select SYS_HAS_EARLY_PRINTK
231 select SYS_SUPPORTS_32BIT_KERNEL
232 select SYS_SUPPORTS_BIG_ENDIAN
233 select SYS_SUPPORTS_MULTITHREADING
234 select SYS_SUPPORTS_LITTLE_ENDIAN
236 This option enables support for MIPS Technologies MIPSsim software
240 bool "NEC EMMA2RH Mark-eins"
243 select DMA_NONCOHERENT
247 select SYS_SUPPORTS_32BIT_KERNEL
248 select SYS_SUPPORTS_BIG_ENDIAN
249 select SYS_SUPPORTS_LITTLE_ENDIAN
250 select SYS_HAS_CPU_R5000
252 This enables support for the R5432-based NEC Mark-eins
253 boards with R5500 CPU.
256 bool "NEC VR4100 series based machines"
259 select SYS_HAS_CPU_VR41XX
260 select GENERIC_HARDIRQS_NO__DO_IRQ
263 bool "NXP PNX8550 based JBS board"
265 select SYS_SUPPORTS_LITTLE_ENDIAN
267 config PNX8550_STB810
268 bool "NXP PNX8550 based STB810 board"
270 select SYS_SUPPORTS_LITTLE_ENDIAN
273 bool "PMC-Sierra MSP chipsets"
274 depends on EXPERIMENTAL
275 select DMA_NONCOHERENT
277 select NO_EXCEPT_FILL
279 select SYS_HAS_CPU_MIPS32_R1
280 select SYS_HAS_CPU_MIPS32_R2
281 select SYS_SUPPORTS_32BIT_KERNEL
282 select SYS_SUPPORTS_BIG_ENDIAN
283 select SYS_SUPPORTS_KGDB
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_KGDB
310 select SYS_SUPPORTS_SMP
312 Yosemite is an evaluation board for the RM9000x2 processor
313 manufactured by PMC-Sierra.
316 bool "SGI IP22 (Indy/Indigo2)"
322 select DEFAULT_SGI_PARTITION
323 select DMA_NONCOHERENT
327 select IP22_CPU_SCACHE
329 select GENERIC_ISA_DMA_SUPPORT_BROKEN
330 select SGI_HAS_DS1286
332 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_KGDB
362 select SYS_SUPPORTS_NUMA
363 select SYS_SUPPORTS_SMP
364 select GENERIC_HARDIRQS_NO__DO_IRQ
366 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
367 workstations. To compile a Linux kernel that runs on these, say Y
371 bool "SGI IP28 (Indigo2 R10k) (EXPERIMENTAL)"
372 depends on EXPERIMENTAL
378 select DEFAULT_SGI_PARTITION
379 select DMA_NONCOHERENT
380 select GENERIC_ISA_DMA_SUPPORT_BROKEN
385 select SGI_HAS_DS1286
387 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_KGDB
477 select SYS_SUPPORTS_LITTLE_ENDIAN
478 select ZONE_DMA32 if 64BIT
480 config SIBYTE_LITTLESUR
481 bool "Sibyte BCM91250C2-LittleSur"
482 depends on EXPERIMENTAL
485 select NR_CPUS_DEFAULT_2
488 select SYS_HAS_CPU_SB1
489 select SYS_SUPPORTS_BIG_ENDIAN
490 select SYS_SUPPORTS_HIGHMEM
491 select SYS_SUPPORTS_LITTLE_ENDIAN
493 config SIBYTE_SENTOSA
494 bool "Sibyte BCM91250E-Sentosa"
495 depends on EXPERIMENTAL
498 select NR_CPUS_DEFAULT_2
501 select SYS_HAS_CPU_SB1
502 select SYS_SUPPORTS_BIG_ENDIAN
503 select SYS_SUPPORTS_LITTLE_ENDIAN
506 bool "Sibyte BCM91480B-BigSur"
509 select NR_CPUS_DEFAULT_4
510 select SIBYTE_BCM1x80
512 select SYS_HAS_CPU_SB1
513 select SYS_SUPPORTS_BIG_ENDIAN
514 select SYS_SUPPORTS_HIGHMEM
515 select SYS_SUPPORTS_LITTLE_ENDIAN
516 select ZONE_DMA32 if 64BIT
519 bool "SNI RM200/300/400"
520 select ARC if CPU_LITTLE_ENDIAN
521 select ARC32 if CPU_LITTLE_ENDIAN
522 select SNIPROM if CPU_BIG_ENDIAN
523 select ARCH_MAY_HAVE_PC_FDC
527 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
528 select DMA_NONCOHERENT
529 select GENERIC_ISA_DMA
536 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
537 select SYS_HAS_CPU_R4X00
538 select SYS_HAS_CPU_R5000
539 select SYS_HAS_CPU_R10000
540 select R5000_CPU_SCACHE
541 select SYS_HAS_EARLY_PRINTK
542 select SYS_SUPPORTS_32BIT_KERNEL
543 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
544 select SYS_SUPPORTS_BIG_ENDIAN
545 select SYS_SUPPORTS_HIGHMEM
546 select SYS_SUPPORTS_LITTLE_ENDIAN
548 The SNI RM200/300/400 are MIPS-based machines manufactured by
549 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
550 Technology and now in turn merged with Fujitsu. Say Y here to
551 support this machine type.
553 config TOSHIBA_JMR3927
554 bool "Toshiba JMR-TX3927 board"
556 select DMA_NONCOHERENT
561 select SYS_HAS_CPU_TX39XX
562 select SYS_SUPPORTS_32BIT_KERNEL
563 select SYS_SUPPORTS_LITTLE_ENDIAN
564 select SYS_SUPPORTS_BIG_ENDIAN
565 select GENERIC_HARDIRQS_NO__DO_IRQ
568 config TOSHIBA_RBTX4927
569 bool "Toshiba RBTX49[23]7 board"
573 select DMA_NONCOHERENT
574 select HAS_TXX9_SERIAL
578 select I8259 if TOSHIBA_FPCIB0
580 select SYS_HAS_CPU_TX49XX
581 select SYS_SUPPORTS_32BIT_KERNEL
582 select SYS_SUPPORTS_64BIT_KERNEL
583 select SYS_SUPPORTS_LITTLE_ENDIAN
584 select SYS_SUPPORTS_BIG_ENDIAN
585 select SYS_SUPPORTS_KGDB
586 select GENERIC_HARDIRQS_NO__DO_IRQ
588 This Toshiba board is based on the TX4927 processor. Say Y here to
589 support this machine type
591 config TOSHIBA_RBTX4938
592 bool "Toshiba RBTX4938 board"
596 select DMA_NONCOHERENT
597 select HAS_TXX9_SERIAL
602 select SYS_HAS_CPU_TX49XX
603 select SYS_SUPPORTS_32BIT_KERNEL
604 select SYS_SUPPORTS_LITTLE_ENDIAN
605 select SYS_SUPPORTS_BIG_ENDIAN
606 select SYS_SUPPORTS_KGDB
607 select GENERIC_HARDIRQS_NO__DO_IRQ
610 This Toshiba board is based on the TX4938 processor. Say Y here to
611 support this machine type
614 bool "Wind River PPMC board"
619 select DMA_NONCOHERENT
621 select PCI_GT64XXX_PCI0
623 select SYS_HAS_CPU_MIPS32_R1
624 select SYS_HAS_CPU_MIPS32_R2
625 select SYS_HAS_CPU_MIPS64_R1
626 select SYS_HAS_CPU_NEVADA
627 select SYS_HAS_CPU_RM7000
628 select SYS_SUPPORTS_32BIT_KERNEL
629 select SYS_SUPPORTS_64BIT_KERNEL
630 select SYS_SUPPORTS_BIG_ENDIAN
631 select SYS_SUPPORTS_LITTLE_ENDIAN
633 This enables support for the Wind River MIPS32 4KC PPMC evaluation
634 board, which is based on GT64120 bridge chip.
638 source "arch/mips/au1000/Kconfig"
639 source "arch/mips/basler/excite/Kconfig"
640 source "arch/mips/jazz/Kconfig"
641 source "arch/mips/lasat/Kconfig"
642 source "arch/mips/pmc-sierra/Kconfig"
643 source "arch/mips/sgi-ip27/Kconfig"
644 source "arch/mips/sibyte/Kconfig"
645 source "arch/mips/txx9/Kconfig"
646 source "arch/mips/vr41xx/Kconfig"
650 config GENERIC_LOCKBREAK
653 depends on SMP && PREEMPT
655 config RWSEM_GENERIC_SPINLOCK
659 config RWSEM_XCHGADD_ALGORITHM
662 config ARCH_HAS_ILOG2_U32
666 config ARCH_HAS_ILOG2_U64
670 config ARCH_SUPPORTS_OPROFILE
672 default y if !MIPS_MT_SMTC
674 config GENERIC_FIND_NEXT_BIT
678 config GENERIC_HWEIGHT
682 config GENERIC_CALIBRATE_DELAY
686 config GENERIC_CLOCKEVENTS
694 config GENERIC_CMOS_UPDATE
698 config SCHED_NO_NO_OMIT_FRAME_POINTER
702 config GENERIC_HARDIRQS_NO__DO_IRQ
707 # Select some configuration options automatically based on user selections.
712 config ARCH_MAY_HAVE_PC_FDC
762 config DMA_NONCOHERENT
764 select DMA_NEED_PCI_MAP_STATE
766 config DMA_NEED_PCI_MAP_STATE
770 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
771 depends on SYS_HAS_EARLY_PRINTK
774 This option enables special console drivers which allow the kernel
775 to print messages very early in the bootup process.
777 This is useful for kernel debugging when your machine crashes very
778 early before the console code is initialized. For normal operation,
779 it is not recommended because it looks ugly on some machines and
780 doesn't cooperate with an X server. You should normally say N here,
781 unless you want to debug such a crash.
783 config SYS_HAS_EARLY_PRINTK
802 config MIPS_DISABLE_OBSOLETE_IDE
811 config GENERIC_ISA_DMA
813 select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
815 config GENERIC_ISA_DMA_SUPPORT_BROKEN
817 select GENERIC_ISA_DMA
823 # Endianess selection. Sufficiently obscure so many users don't know what to
824 # answer,so we try hard to limit the available choices. Also the use of a
825 # choice statement should be more obvious to the user.
828 prompt "Endianess selection"
830 Some MIPS machines can be configured for either little or big endian
831 byte order. These modes require different kernels and a different
832 Linux distribution. In general there is one preferred byteorder for a
833 particular system but some systems are just as commonly used in the
834 one or the other endianness.
836 config CPU_BIG_ENDIAN
838 depends on SYS_SUPPORTS_BIG_ENDIAN
840 config CPU_LITTLE_ENDIAN
842 depends on SYS_SUPPORTS_LITTLE_ENDIAN
847 config SYS_SUPPORTS_APM_EMULATION
850 config SYS_SUPPORTS_BIG_ENDIAN
853 config SYS_SUPPORTS_LITTLE_ENDIAN
880 config MIPS_BOARDS_GEN
883 config PCI_GT64XXX_PCI0
886 config NO_EXCEPT_FILL
891 select HAS_TXX9_SERIAL
903 select DMA_NONCOHERENT
905 select SYS_HAS_CPU_MIPS32_R1
906 select SYS_HAS_EARLY_PRINTK
907 select SYS_SUPPORTS_32BIT_KERNEL
908 select GENERIC_HARDIRQS_NO__DO_IRQ
909 select SYS_SUPPORTS_KGDB
923 config SGI_HAS_DS1286
926 config SGI_HAS_INDYDOG
941 config DEFAULT_SGI_PARTITION
953 config MIPS_L1_CACHE_SHIFT
955 default "4" if MACH_DECSTATION
956 default "7" if SGI_IP22 || SGI_IP27 || SGI_IP28 || SNI_RM
957 default "4" if PMC_MSP4200_EVAL
960 config HAVE_STD_PC_SERIAL_PORT
964 bool "ARC console support"
965 depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
969 depends on MACH_JAZZ || SNI_RM || SGI_IP32
974 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP28 || SGI_IP32
991 depends on SYS_HAS_CPU_LOONGSON2
992 select CPU_SUPPORTS_32BIT_KERNEL
993 select CPU_SUPPORTS_64BIT_KERNEL
994 select CPU_SUPPORTS_HIGHMEM
996 The Loongson 2E processor implements the MIPS III instruction set
997 with many extensions.
1000 bool "MIPS32 Release 1"
1001 depends on SYS_HAS_CPU_MIPS32_R1
1003 select CPU_HAS_PREFETCH
1004 select CPU_SUPPORTS_32BIT_KERNEL
1005 select CPU_SUPPORTS_HIGHMEM
1007 Choose this option to build a kernel for release 1 or later of the
1008 MIPS32 architecture. Most modern embedded systems with a 32-bit
1009 MIPS processor are based on a MIPS32 processor. If you know the
1010 specific type of processor in your system, choose those that one
1011 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1012 Release 2 of the MIPS32 architecture is available since several
1013 years so chances are you even have a MIPS32 Release 2 processor
1014 in which case you should choose CPU_MIPS32_R2 instead for better
1017 config CPU_MIPS32_R2
1018 bool "MIPS32 Release 2"
1019 depends on SYS_HAS_CPU_MIPS32_R2
1021 select CPU_HAS_PREFETCH
1022 select CPU_SUPPORTS_32BIT_KERNEL
1023 select CPU_SUPPORTS_HIGHMEM
1025 Choose this option to build a kernel for release 2 or later of the
1026 MIPS32 architecture. Most modern embedded systems with a 32-bit
1027 MIPS processor are based on a MIPS32 processor. If you know the
1028 specific type of processor in your system, choose those that one
1029 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1031 config CPU_MIPS64_R1
1032 bool "MIPS64 Release 1"
1033 depends on SYS_HAS_CPU_MIPS64_R1
1035 select CPU_HAS_PREFETCH
1036 select CPU_SUPPORTS_32BIT_KERNEL
1037 select CPU_SUPPORTS_64BIT_KERNEL
1038 select CPU_SUPPORTS_HIGHMEM
1040 Choose this option to build a kernel for release 1 or later of the
1041 MIPS64 architecture. Many modern embedded systems with a 64-bit
1042 MIPS processor are based on a MIPS64 processor. If you know the
1043 specific type of processor in your system, choose those that one
1044 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1045 Release 2 of the MIPS64 architecture is available since several
1046 years so chances are you even have a MIPS64 Release 2 processor
1047 in which case you should choose CPU_MIPS64_R2 instead for better
1050 config CPU_MIPS64_R2
1051 bool "MIPS64 Release 2"
1052 depends on SYS_HAS_CPU_MIPS64_R2
1054 select CPU_HAS_PREFETCH
1055 select CPU_SUPPORTS_32BIT_KERNEL
1056 select CPU_SUPPORTS_64BIT_KERNEL
1057 select CPU_SUPPORTS_HIGHMEM
1059 Choose this option to build a kernel for release 2 or later of the
1060 MIPS64 architecture. Many modern embedded systems with a 64-bit
1061 MIPS processor are based on a MIPS64 processor. If you know the
1062 specific type of processor in your system, choose those that one
1063 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1067 depends on SYS_HAS_CPU_R3000
1069 select CPU_SUPPORTS_32BIT_KERNEL
1070 select CPU_SUPPORTS_HIGHMEM
1072 Please make sure to pick the right CPU type. Linux/MIPS is not
1073 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
1074 *not* work on R4000 machines and vice versa. However, since most
1075 of the supported machines have an R4000 (or similar) CPU, R4x00
1076 might be a safe bet. If the resulting kernel does not work,
1077 try to recompile with R3000.
1081 depends on SYS_HAS_CPU_TX39XX
1082 select CPU_SUPPORTS_32BIT_KERNEL
1086 depends on SYS_HAS_CPU_VR41XX
1087 select CPU_SUPPORTS_32BIT_KERNEL
1088 select CPU_SUPPORTS_64BIT_KERNEL
1090 The options selects support for the NEC VR4100 series of processors.
1091 Only choose this option if you have one of these processors as a
1092 kernel built with this option will not run on any other type of
1093 processor or vice versa.
1097 depends on SYS_HAS_CPU_R4300
1099 select CPU_SUPPORTS_32BIT_KERNEL
1100 select CPU_SUPPORTS_64BIT_KERNEL
1102 MIPS Technologies R4300-series processors.
1106 depends on SYS_HAS_CPU_R4X00
1108 select CPU_SUPPORTS_32BIT_KERNEL
1109 select CPU_SUPPORTS_64BIT_KERNEL
1111 MIPS Technologies R4000-series processors other than 4300, including
1112 the R4000, R4400, R4600, and 4700.
1116 depends on SYS_HAS_CPU_TX49XX
1118 select CPU_HAS_PREFETCH
1119 select CPU_SUPPORTS_32BIT_KERNEL
1120 select CPU_SUPPORTS_64BIT_KERNEL
1124 depends on SYS_HAS_CPU_R5000
1126 select CPU_SUPPORTS_32BIT_KERNEL
1127 select CPU_SUPPORTS_64BIT_KERNEL
1129 MIPS Technologies R5000-series processors other than the Nevada.
1133 depends on SYS_HAS_CPU_R5432
1135 select CPU_SUPPORTS_32BIT_KERNEL
1136 select CPU_SUPPORTS_64BIT_KERNEL
1140 depends on EXPERIMENTAL
1142 depends on SYS_HAS_CPU_R6000
1143 select CPU_SUPPORTS_32BIT_KERNEL
1145 MIPS Technologies R6000 and R6000A series processors. Note these
1146 processors are extremely rare and the support for them is incomplete.
1150 depends on SYS_HAS_CPU_NEVADA
1152 select CPU_SUPPORTS_32BIT_KERNEL
1153 select CPU_SUPPORTS_64BIT_KERNEL
1155 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1159 depends on EXPERIMENTAL
1160 depends on SYS_HAS_CPU_R8000
1162 select CPU_HAS_PREFETCH
1163 select CPU_SUPPORTS_64BIT_KERNEL
1165 MIPS Technologies R8000 processors. Note these processors are
1166 uncommon and the support for them is incomplete.
1170 depends on SYS_HAS_CPU_R10000
1172 select CPU_HAS_PREFETCH
1173 select CPU_SUPPORTS_32BIT_KERNEL
1174 select CPU_SUPPORTS_64BIT_KERNEL
1175 select CPU_SUPPORTS_HIGHMEM
1177 MIPS Technologies R10000-series processors.
1181 depends on SYS_HAS_CPU_RM7000
1183 select CPU_HAS_PREFETCH
1184 select CPU_SUPPORTS_32BIT_KERNEL
1185 select CPU_SUPPORTS_64BIT_KERNEL
1186 select CPU_SUPPORTS_HIGHMEM
1190 depends on SYS_HAS_CPU_RM9000
1192 select CPU_HAS_PREFETCH
1193 select CPU_SUPPORTS_32BIT_KERNEL
1194 select CPU_SUPPORTS_64BIT_KERNEL
1195 select CPU_SUPPORTS_HIGHMEM
1196 select WEAK_ORDERING
1200 depends on SYS_HAS_CPU_SB1
1202 select CPU_SUPPORTS_32BIT_KERNEL
1203 select CPU_SUPPORTS_64BIT_KERNEL
1204 select CPU_SUPPORTS_HIGHMEM
1205 select WEAK_ORDERING
1209 config SYS_HAS_CPU_LOONGSON2
1212 config SYS_HAS_CPU_MIPS32_R1
1215 config SYS_HAS_CPU_MIPS32_R2
1218 config SYS_HAS_CPU_MIPS64_R1
1221 config SYS_HAS_CPU_MIPS64_R2
1224 config SYS_HAS_CPU_R3000
1227 config SYS_HAS_CPU_TX39XX
1230 config SYS_HAS_CPU_VR41XX
1233 config SYS_HAS_CPU_R4300
1236 config SYS_HAS_CPU_R4X00
1239 config SYS_HAS_CPU_TX49XX
1242 config SYS_HAS_CPU_R5000
1245 config SYS_HAS_CPU_R5432
1248 config SYS_HAS_CPU_R6000
1251 config SYS_HAS_CPU_NEVADA
1254 config SYS_HAS_CPU_R8000
1257 config SYS_HAS_CPU_R10000
1260 config SYS_HAS_CPU_RM7000
1263 config SYS_HAS_CPU_RM9000
1266 config SYS_HAS_CPU_SB1
1270 # CPU may reorder R->R, R->W, W->R, W->W
1271 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1273 config WEAK_ORDERING
1277 # CPU may reorder reads and writes beyond LL/SC
1278 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1280 config WEAK_REORDERING_BEYOND_LLSC
1285 # These two indicate any level of the MIPS32 and MIPS64 architecture
1289 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1293 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1296 # These two indicate the revision of the architecture, either Release 1 or Release 2
1300 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1304 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2
1306 config SYS_SUPPORTS_32BIT_KERNEL
1308 config SYS_SUPPORTS_64BIT_KERNEL
1310 config CPU_SUPPORTS_32BIT_KERNEL
1312 config CPU_SUPPORTS_64BIT_KERNEL
1319 prompt "Kernel code model"
1321 You should only select this option if you have a workload that
1322 actually benefits from 64-bit processing or if your machine has
1323 large memory. You will only be presented a single option in this
1324 menu if your system does not support both 32-bit and 64-bit kernels.
1327 bool "32-bit kernel"
1328 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1331 Select this option if you want to build a 32-bit kernel.
1333 bool "64-bit kernel"
1334 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1336 Select this option if you want to build a 64-bit kernel.
1341 prompt "Kernel page size"
1342 default PAGE_SIZE_4KB
1344 config PAGE_SIZE_4KB
1347 This option select the standard 4kB Linux page size. On some
1348 R3000-family processors this is the only available page size. Using
1349 4kB page size will minimize memory consumption and is therefore
1350 recommended for low memory systems.
1352 config PAGE_SIZE_8KB
1354 depends on EXPERIMENTAL && CPU_R8000
1356 Using 8kB page size will result in higher performance kernel at
1357 the price of higher memory consumption. This option is available
1358 only on the R8000 processor. Not that at the time of this writing
1359 this option is still high experimental; there are also issues with
1360 compatibility of user applications.
1362 config PAGE_SIZE_16KB
1364 depends on !CPU_R3000 && !CPU_TX39XX
1366 Using 16kB page size will result in higher performance kernel at
1367 the price of higher memory consumption. This option is available on
1368 all non-R3000 family processors. Note that you will need a suitable
1369 Linux distribution to support this.
1371 config PAGE_SIZE_64KB
1373 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1375 Using 64kB page size will result in higher performance kernel at
1376 the price of higher memory consumption. This option is available on
1377 all non-R3000 family processor. Not that at the time of this
1378 writing this option is still high experimental.
1385 config IP22_CPU_SCACHE
1390 # Support for a MIPS32 / MIPS64 style S-caches
1392 config MIPS_CPU_SCACHE
1396 config R5000_CPU_SCACHE
1400 config RM7000_CPU_SCACHE
1404 config SIBYTE_DMA_PAGEOPS
1405 bool "Use DMA to clear/copy pages"
1408 Instead of using the CPU to zero and copy pages, use a Data Mover
1409 channel. These DMA channels are otherwise unused by the standard
1410 SiByte Linux port. Seems to give a small performance benefit.
1412 config CPU_HAS_PREFETCH
1416 prompt "MIPS MT options"
1418 config MIPS_MT_DISABLED
1419 bool "Disable multithreading support."
1421 Use this option if your workload can't take advantage of
1422 MIPS hardware multithreading support. On systems that don't have
1423 the option of an MT-enabled processor this option will be the only
1424 option in this menu.
1427 bool "Use 1 TC on each available VPE for SMP"
1428 depends on SYS_SUPPORTS_MULTITHREADING
1429 select CPU_MIPSR2_IRQ_VI
1430 select CPU_MIPSR2_IRQ_EI
1432 select NR_CPUS_DEFAULT_2
1434 select SYS_SUPPORTS_SCHED_SMT if SMP
1435 select SYS_SUPPORTS_SMP
1438 This is a kernel model which is also known a VSMP or lately
1439 has been marketesed into SMVP.
1442 bool "SMTC: Use all TCs on all VPEs for SMP"
1443 depends on CPU_MIPS32_R2
1444 #depends on CPU_MIPS64_R2 # once there is hardware ...
1445 depends on SYS_SUPPORTS_MULTITHREADING
1446 select GENERIC_CLOCKEVENTS_BROADCAST
1447 select CPU_MIPSR2_IRQ_VI
1448 select CPU_MIPSR2_IRQ_EI
1450 select NR_CPUS_DEFAULT_8
1452 select SYS_SUPPORTS_SMP
1455 This is a kernel model which is known a SMTC or lately has been
1456 marketesed into SMVP.
1464 bool "SMT (multithreading) scheduler support"
1465 depends on SYS_SUPPORTS_SCHED_SMT
1468 SMT scheduler support improves the CPU scheduler's decision making
1469 when dealing with MIPS MT enabled cores at a cost of slightly
1470 increased overhead in some places. If unsure say N here.
1472 config SYS_SUPPORTS_SCHED_SMT
1476 config SYS_SUPPORTS_MULTITHREADING
1479 config MIPS_MT_FPAFF
1480 bool "Dynamic FPU affinity for FP-intensive threads"
1482 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1484 config MIPS_VPE_LOADER
1485 bool "VPE loader support."
1486 depends on SYS_SUPPORTS_MULTITHREADING
1487 select CPU_MIPSR2_IRQ_VI
1488 select CPU_MIPSR2_IRQ_EI
1491 Includes a loader for loading an elf relocatable object
1492 onto another VPE and running it.
1494 config MIPS_MT_SMTC_INSTANT_REPLAY
1495 bool "Low-latency Dispatch of Deferred SMTC IPIs"
1496 depends on MIPS_MT_SMTC && !PREEMPT
1499 SMTC pseudo-interrupts between TCs are deferred and queued
1500 if the target TC is interrupt-inhibited (IXMT). In the first
1501 SMTC prototypes, these queued IPIs were serviced on return
1502 to user mode, or on entry into the kernel idle loop. The
1503 INSTANT_REPLAY option dispatches them as part of local_irq_restore()
1504 processing, which adds runtime overhead (hence the option to turn
1505 it off), but ensures that IPIs are handled promptly even under
1506 heavy I/O interrupt load.
1508 config MIPS_MT_SMTC_IM_BACKSTOP
1509 bool "Use per-TC register bits as backstop for inhibited IM bits"
1510 depends on MIPS_MT_SMTC
1513 To support multiple TC microthreads acting as "CPUs" within
1514 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1515 during interrupt handling. To support legacy drivers and interrupt
1516 controller management code, SMTC has a "backstop" to track and
1517 if necessary restore the interrupt mask. This has some performance
1518 impact on interrupt service overhead. Disable it only if you know
1521 config MIPS_MT_SMTC_IRQAFF
1522 bool "Support IRQ affinity API"
1523 depends on MIPS_MT_SMTC
1526 Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.)
1527 for SMTC Linux kernel. Requires platform support, of which
1528 an example can be found in the MIPS kernel i8259 and Malta
1529 platform code. It is recommended that MIPS_MT_SMTC_INSTANT_REPLAY
1530 be enabled if MIPS_MT_SMTC_IRQAFF is used. Adds overhead to
1531 interrupt dispatch, and should be used only if you know what
1534 config MIPS_VPE_LOADER_TOM
1535 bool "Load VPE program into memory hidden from linux"
1536 depends on MIPS_VPE_LOADER
1539 The loader can use memory that is present but has been hidden from
1540 Linux using the kernel command line option "mem=xxMB". It's up to
1541 you to ensure the amount you put in the option and the space your
1542 program requires is less or equal to the amount physically present.
1544 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1545 config MIPS_VPE_APSP_API
1546 bool "Enable support for AP/SP API (RTLX)"
1547 depends on MIPS_VPE_LOADER
1550 config MIPS_APSP_KSPD
1552 depends on MIPS_VPE_APSP_API
1555 KSPD is a kernel daemon that accepts syscall requests from the SP
1556 side, actions them and returns the results. It also handles the
1557 "exit" syscall notifying other kernel modules the SP program is
1558 exiting. You probably want to say yes here.
1560 config SB1_PASS_1_WORKAROUNDS
1562 depends on CPU_SB1_PASS_1
1565 config SB1_PASS_2_WORKAROUNDS
1567 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1570 config SB1_PASS_2_1_WORKAROUNDS
1572 depends on CPU_SB1 && CPU_SB1_PASS_2
1575 config 64BIT_PHYS_ADDR
1581 config CPU_HAS_SMARTMIPS
1582 depends on SYS_SUPPORTS_SMARTMIPS
1583 bool "Support for the SmartMIPS ASE"
1585 SmartMIPS is a extension of the MIPS32 architecture aimed at
1586 increased security at both hardware and software level for
1587 smartcards. Enabling this option will allow proper use of the
1588 SmartMIPS instructions by Linux applications. However a kernel with
1589 this option will not work on a MIPS core without SmartMIPS core. If
1590 you don't know you probably don't have SmartMIPS and should say N
1597 # Vectored interrupt mode is an R2 feature
1599 config CPU_MIPSR2_IRQ_VI
1603 # Extended interrupt mode is an R2 feature
1605 config CPU_MIPSR2_IRQ_EI
1610 depends on !CPU_R3000
1613 config GENERIC_CLOCKEVENTS_BROADCAST
1619 config CPU_DADDI_WORKAROUNDS
1622 config CPU_R4000_WORKAROUNDS
1624 select CPU_R4400_WORKAROUNDS
1626 config CPU_R4400_WORKAROUNDS
1630 # Use the generic interrupt handling code in kernel/irq/:
1632 config GENERIC_HARDIRQS
1636 config GENERIC_IRQ_PROBE
1644 # - Highmem only makes sense for the 32-bit kernel.
1645 # - The current highmem code will only work properly on physically indexed
1646 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1647 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1648 # moment we protect the user and offer the highmem option only on machines
1649 # where it's known to be safe. This will not offer highmem on a few systems
1650 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1651 # indexed CPUs but we're playing safe.
1652 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1653 # know they might have memory configurations that could make use of highmem
1657 bool "High Memory Support"
1658 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1660 config CPU_SUPPORTS_HIGHMEM
1663 config SYS_SUPPORTS_HIGHMEM
1666 config SYS_SUPPORTS_SMARTMIPS
1669 config ARCH_FLATMEM_ENABLE
1673 config ARCH_DISCONTIGMEM_ENABLE
1675 default y if SGI_IP27
1677 Say Y to support efficient handling of discontiguous physical memory,
1678 for architectures which are either NUMA (Non-Uniform Memory Access)
1679 or have huge holes in the physical address space for other reasons.
1680 See <file:Documentation/vm/numa> for more.
1682 config ARCH_POPULATES_NODE_MAP
1685 config ARCH_SPARSEMEM_ENABLE
1687 select SPARSEMEM_STATIC
1691 depends on SYS_SUPPORTS_NUMA
1693 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1694 Access). This option improves performance on systems with more
1695 than two nodes; on two node systems it is generally better to
1696 leave it disabled; on single node systems disable this option
1699 config SYS_SUPPORTS_NUMA
1705 depends on NEED_MULTIPLE_NODES
1710 bool "Multi-Processing support"
1711 depends on SYS_SUPPORTS_SMP
1714 This enables support for systems with more than one CPU. If you have
1715 a system with only one CPU, like most personal computers, say N. If
1716 you have a system with more than one CPU, say Y.
1718 If you say N here, the kernel will run on single and multiprocessor
1719 machines, but will use only one CPU of a multiprocessor machine. If
1720 you say Y here, the kernel will run on many, but not all,
1721 singleprocessor machines. On a singleprocessor machine, the kernel
1722 will run faster if you say N here.
1724 People using multiprocessor machines who say Y here should also say
1725 Y to "Enhanced Real Time Clock Support", below.
1727 See also the SMP-HOWTO available at
1728 <http://www.tldp.org/docs.html#howto>.
1730 If you don't know what to do here, say N.
1735 config SYS_SUPPORTS_SMP
1738 config NR_CPUS_DEFAULT_1
1741 config NR_CPUS_DEFAULT_2
1744 config NR_CPUS_DEFAULT_4
1747 config NR_CPUS_DEFAULT_8
1750 config NR_CPUS_DEFAULT_16
1753 config NR_CPUS_DEFAULT_32
1756 config NR_CPUS_DEFAULT_64
1760 int "Maximum number of CPUs (2-64)"
1761 range 1 64 if NR_CPUS_DEFAULT_1
1763 default "1" if NR_CPUS_DEFAULT_1
1764 default "2" if NR_CPUS_DEFAULT_2
1765 default "4" if NR_CPUS_DEFAULT_4
1766 default "8" if NR_CPUS_DEFAULT_8
1767 default "16" if NR_CPUS_DEFAULT_16
1768 default "32" if NR_CPUS_DEFAULT_32
1769 default "64" if NR_CPUS_DEFAULT_64
1771 This allows you to specify the maximum number of CPUs which this
1772 kernel will support. The maximum supported value is 32 for 32-bit
1773 kernel and 64 for 64-bit kernels; the minimum value which makes
1774 sense is 1 for Qemu (useful only for kernel debugging purposes)
1775 and 2 for all others.
1777 This is purely to save memory - each supported CPU adds
1778 approximately eight kilobytes to the kernel image. For best
1779 performance should round up your number of processors to the next
1783 bool "MIPS CMP framework support"
1786 select SYS_SUPPORTS_SCHED_SMT
1787 select WEAK_ORDERING
1790 This is a placeholder option for the GCMP work. It will need to
1791 be handled differently...
1793 source "kernel/time/Kconfig"
1796 # Timer Interrupt Frequency Configuration
1800 prompt "Timer frequency"
1803 Allows the configuration of the timer frequency.
1806 bool "48 HZ" if SYS_SUPPORTS_48HZ || SYS_SUPPORTS_ARBIT_HZ
1809 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1812 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1815 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1818 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1821 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1824 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1828 config SYS_SUPPORTS_48HZ
1831 config SYS_SUPPORTS_100HZ
1834 config SYS_SUPPORTS_128HZ
1837 config SYS_SUPPORTS_250HZ
1840 config SYS_SUPPORTS_256HZ
1843 config SYS_SUPPORTS_1000HZ
1846 config SYS_SUPPORTS_1024HZ
1849 config SYS_SUPPORTS_ARBIT_HZ
1851 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1852 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1853 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1854 !SYS_SUPPORTS_1024HZ
1859 default 100 if HZ_100
1860 default 128 if HZ_128
1861 default 250 if HZ_250
1862 default 256 if HZ_256
1863 default 1000 if HZ_1000
1864 default 1024 if HZ_1024
1866 source "kernel/Kconfig.preempt"
1868 config MIPS_INSANE_LARGE
1869 bool "Support for large 64-bit configurations"
1870 depends on CPU_R10000 && 64BIT
1872 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1873 previous 64-bit processors which only supported 40 bit / 1TB. If you
1874 need processes of more than 1TB virtual address space, say Y here.
1875 This will result in additional memory usage, so it is not
1876 recommended for normal users.
1879 bool "Kexec system call (EXPERIMENTAL)"
1880 depends on EXPERIMENTAL
1882 kexec is a system call that implements the ability to shutdown your
1883 current kernel, and to start another kernel. It is like a reboot
1884 but it is independent of the system firmware. And like a reboot
1885 you can start any kernel with it, not just Linux.
1887 The name comes from the similarity to the exec system call.
1889 It is an ongoing process to be certain the hardware in a machine
1890 is properly shutdown, so do not be surprised if this code does not
1891 initially work for you. It may help to enable device hotplugging
1892 support. As of this writing the exact hardware interface is
1893 strongly in flux, so no good recommendation can be made.
1896 bool "Enable seccomp to safely compute untrusted bytecode"
1900 This kernel feature is useful for number crunching applications
1901 that may need to compute untrusted bytecode during their
1902 execution. By using pipes or other transports made available to
1903 the process as file descriptors supporting the read/write
1904 syscalls, it's possible to isolate those applications in
1905 their own address space using seccomp. Once seccomp is
1906 enabled via /proc/<pid>/seccomp, it cannot be disabled
1907 and the task is only allowed to execute a few safe syscalls
1908 defined by each seccomp mode.
1910 If unsure, say Y. Only embedded should say N here.
1914 config RWSEM_GENERIC_SPINLOCK
1918 config LOCKDEP_SUPPORT
1922 config STACKTRACE_SUPPORT
1926 source "init/Kconfig"
1928 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1936 bool "Support for PCI controller"
1937 depends on HW_HAS_PCI
1940 Find out whether you have a PCI motherboard. PCI is the name of a
1941 bus system, i.e. the way the CPU talks to the other stuff inside
1942 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
1948 source "drivers/pci/Kconfig"
1951 # ISA support is now enabled via select. Too many systems still have the one
1952 # or other ISA chip on the board that users don't know about so don't expect
1953 # users to choose the right thing ...
1960 depends on HW_HAS_EISA
1962 select GENERIC_ISA_DMA
1964 The Extended Industry Standard Architecture (EISA) bus was
1965 developed as an open alternative to the IBM MicroChannel bus.
1967 The EISA bus provided some of the features of the IBM MicroChannel
1968 bus while maintaining backward compatibility with cards made for
1969 the older ISA bus. The EISA bus saw limited use between 1988 and
1970 1995 when it was made obsolete by the PCI bus.
1972 Say Y here if you are building a kernel for an EISA-based machine.
1976 source "drivers/eisa/Kconfig"
1979 bool "TURBOchannel support"
1980 depends on MACH_DECSTATION
1982 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
1983 processors. Documentation on writing device drivers for TurboChannel
1985 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
1988 # bool "Access.Bus support"
2001 source "drivers/pcmcia/Kconfig"
2003 source "drivers/pci/hotplug/Kconfig"
2007 menu "Executable file formats"
2009 source "fs/Kconfig.binfmt"
2014 config MIPS32_COMPAT
2015 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
2018 Select this option if you want Linux/MIPS 32-bit binary
2019 compatibility. Since all software available for Linux/MIPS is
2020 currently 32-bit you should say Y here.
2024 depends on MIPS32_COMPAT
2027 config SYSVIPC_COMPAT
2029 depends on COMPAT && SYSVIPC
2033 bool "Kernel support for o32 binaries"
2034 depends on MIPS32_COMPAT
2036 Select this option if you want to run o32 binaries. These are pure
2037 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
2038 existing binaries are in this format.
2043 bool "Kernel support for n32 binaries"
2044 depends on MIPS32_COMPAT
2046 Select this option if you want to run n32 binaries. These are
2047 64-bit binaries using 32-bit quantities for addressing and certain
2048 data that would normally be 64-bit. They are used in special
2055 default y if MIPS32_O32 || MIPS32_N32
2059 menu "Power management options"
2061 config ARCH_SUSPEND_POSSIBLE
2065 source "kernel/power/Kconfig"
2069 source "net/Kconfig"
2071 source "drivers/Kconfig"
2075 source "arch/mips/Kconfig.debug"
2077 source "security/Kconfig"
2079 source "crypto/Kconfig"
2081 source "lib/Kconfig"