4 # Horrible source of confusion. Die, die, die ...
8 mainmenu "Linux/MIPS Kernel Configuration"
10 menu "Machine selection"
20 bool "Alchemy processor based machines"
23 bool "Basler eXcite smart camera"
32 select SYS_HAS_CPU_RM9000
33 select SYS_SUPPORTS_32BIT_KERNEL
34 select SYS_SUPPORTS_BIG_ENDIAN
35 select SYS_SUPPORTS_KGDB
37 The eXcite is a smart camera platform manufactured by
38 Basler Vision Technologies AG.
41 bool "BCM47XX based boards"
44 select DMA_NONCOHERENT
47 select SYS_HAS_CPU_MIPS32_R1
48 select SYS_SUPPORTS_32BIT_KERNEL
49 select SYS_SUPPORTS_LITTLE_ENDIAN
51 select SSB_DRIVER_MIPS
52 select SSB_DRIVER_EXTIF
53 select SSB_PCICORE_HOSTMODE if PCI
55 select SYS_HAS_EARLY_PRINTK
58 Support for BCM47XX based boards
65 select DMA_NONCOHERENT
71 select PCI_GT64XXX_PCI0
72 select SYS_HAS_CPU_NEVADA
73 select SYS_HAS_EARLY_PRINTK
74 select SYS_SUPPORTS_32BIT_KERNEL
75 select SYS_SUPPORTS_64BIT_KERNEL
76 select SYS_SUPPORTS_LITTLE_ENDIAN
77 select GENERIC_HARDIRQS_NO__DO_IRQ
79 config MACH_DECSTATION
84 select CPU_DADDI_WORKAROUNDS if 64BIT
85 select CPU_R4000_WORKAROUNDS if 64BIT
86 select CPU_R4400_WORKAROUNDS if 64BIT
87 select DMA_NONCOHERENT
90 select SYS_HAS_CPU_R3000
91 select SYS_HAS_CPU_R4X00
92 select SYS_SUPPORTS_32BIT_KERNEL
93 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
94 select SYS_SUPPORTS_LITTLE_ENDIAN
95 select SYS_SUPPORTS_128HZ
96 select SYS_SUPPORTS_256HZ
97 select SYS_SUPPORTS_1024HZ
99 This enables support for DEC's MIPS based workstations. For details
100 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
101 DECstation porting pages on <http://decstation.unix-ag.org/>.
103 If you have one of the following DECstation Models you definitely
104 want to choose R4xx0 for the CPU Type:
111 otherwise choose R3000.
114 bool "Jazz family of machines"
117 select ARCH_MAY_HAVE_PC_FDC
120 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
121 select GENERIC_ISA_DMA
126 select SYS_HAS_CPU_R4X00
127 select SYS_SUPPORTS_32BIT_KERNEL
128 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
129 select SYS_SUPPORTS_100HZ
130 select GENERIC_HARDIRQS_NO__DO_IRQ
132 This a family of machines based on the MIPS R4030 chipset which was
133 used by several vendors to build RISC/os and Windows NT workstations.
134 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millenium and
135 Olivetti M700-10 workstations.
138 bool "LASAT Networks platforms"
141 select DMA_NONCOHERENT
142 select SYS_HAS_EARLY_PRINTK
145 select PCI_GT64XXX_PCI0
147 select R5000_CPU_SCACHE
148 select SYS_HAS_CPU_R5000
149 select SYS_SUPPORTS_32BIT_KERNEL
150 select SYS_SUPPORTS_64BIT_KERNEL if BROKEN
151 select SYS_SUPPORTS_LITTLE_ENDIAN
152 select GENERIC_HARDIRQS_NO__DO_IRQ
155 bool "Lemote Fulong mini-PC"
156 select ARCH_SPARSEMEM_ENABLE
159 select SYS_HAS_CPU_LOONGSON2
160 select DMA_NONCOHERENT
163 select HAVE_STD_PC_SERIAL_PORT
168 select SYS_SUPPORTS_32BIT_KERNEL
169 select SYS_SUPPORTS_64BIT_KERNEL
170 select SYS_SUPPORTS_LITTLE_ENDIAN
171 select SYS_SUPPORTS_HIGHMEM
172 select SYS_HAS_EARLY_PRINTK
173 select GENERIC_HARDIRQS_NO__DO_IRQ
174 select GENERIC_ISA_DMA_SUPPORT_BROKEN
177 Lemote Fulong mini-PC board based on the Chinese Loongson-2E CPU and
181 bool "MIPS Atlas board"
186 select DMA_NONCOHERENT
187 select SYS_HAS_EARLY_PRINTK
190 select MIPS_BOARDS_GEN
192 select PCI_GT64XXX_PCI0
194 select RM7000_CPU_SCACHE
196 select SYS_HAS_CPU_MIPS32_R1
197 select SYS_HAS_CPU_MIPS32_R2
198 select SYS_HAS_CPU_MIPS64_R1
199 select SYS_HAS_CPU_NEVADA
200 select SYS_HAS_CPU_RM7000
201 select SYS_SUPPORTS_32BIT_KERNEL
202 select SYS_SUPPORTS_64BIT_KERNEL
203 select SYS_SUPPORTS_BIG_ENDIAN
204 select SYS_SUPPORTS_LITTLE_ENDIAN
205 select SYS_SUPPORTS_MULTITHREADING if EXPERIMENTAL
206 select SYS_SUPPORTS_SMARTMIPS
207 select GENERIC_HARDIRQS_NO__DO_IRQ
209 This enables support for the MIPS Technologies Atlas evaluation
213 bool "MIPS Malta board"
214 select ARCH_MAY_HAVE_PC_FDC
219 select DMA_NONCOHERENT
220 select GENERIC_ISA_DMA
225 select MIPS_BOARDS_GEN
227 select MIPS_CPU_SCACHE
228 select PCI_GT64XXX_PCI0
231 select SYS_HAS_CPU_MIPS32_R1
232 select SYS_HAS_CPU_MIPS32_R2
233 select SYS_HAS_CPU_MIPS64_R1
234 select SYS_HAS_CPU_NEVADA
235 select SYS_HAS_CPU_RM7000
236 select SYS_HAS_EARLY_PRINTK
237 select SYS_SUPPORTS_32BIT_KERNEL
238 select SYS_SUPPORTS_64BIT_KERNEL
239 select SYS_SUPPORTS_BIG_ENDIAN
240 select SYS_SUPPORTS_LITTLE_ENDIAN
241 select SYS_SUPPORTS_MULTITHREADING
242 select SYS_SUPPORTS_SMARTMIPS
244 This enables support for the MIPS Technologies Malta evaluation
248 bool "MIPS SEAD board"
252 select DMA_NONCOHERENT
253 select SYS_HAS_EARLY_PRINTK
254 select MIPS_BOARDS_GEN
255 select SYS_HAS_CPU_MIPS32_R1
256 select SYS_HAS_CPU_MIPS32_R2
257 select SYS_HAS_CPU_MIPS64_R1
258 select SYS_SUPPORTS_32BIT_KERNEL
259 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
260 select SYS_SUPPORTS_BIG_ENDIAN
261 select SYS_SUPPORTS_LITTLE_ENDIAN
262 select SYS_SUPPORTS_SMARTMIPS
264 This enables support for the MIPS Technologies SEAD evaluation
268 bool 'MIPS simulator (MIPSsim)'
271 select DMA_NONCOHERENT
272 select SYS_HAS_EARLY_PRINTK
275 select SYS_HAS_CPU_MIPS32_R1
276 select SYS_HAS_CPU_MIPS32_R2
277 select SYS_HAS_EARLY_PRINTK
278 select SYS_SUPPORTS_32BIT_KERNEL
279 select SYS_SUPPORTS_BIG_ENDIAN
280 select SYS_SUPPORTS_MULTITHREADING
281 select SYS_SUPPORTS_LITTLE_ENDIAN
283 This option enables support for MIPS Technologies MIPSsim software
287 bool "NEC EMMA2RH Mark-eins"
290 select DMA_NONCOHERENT
294 select SYS_SUPPORTS_32BIT_KERNEL
295 select SYS_SUPPORTS_BIG_ENDIAN
296 select SYS_SUPPORTS_LITTLE_ENDIAN
297 select SYS_HAS_CPU_R5000
299 This enables support for the R5432-based NEC Mark-eins
300 boards with R5500 CPU.
303 bool "NEC VR4100 series based machines"
306 select SYS_HAS_CPU_VR41XX
307 select GENERIC_HARDIRQS_NO__DO_IRQ
310 bool "Philips PNX8550 based JBS board"
312 select SYS_SUPPORTS_LITTLE_ENDIAN
314 config PNX8550_STB810
315 bool "Philips PNX8550 based STB810 board"
317 select SYS_SUPPORTS_LITTLE_ENDIAN
320 bool "PMC-Sierra MSP chipsets"
321 depends on EXPERIMENTAL
322 select DMA_NONCOHERENT
324 select NO_EXCEPT_FILL
326 select SYS_HAS_CPU_MIPS32_R1
327 select SYS_HAS_CPU_MIPS32_R2
328 select SYS_SUPPORTS_32BIT_KERNEL
329 select SYS_SUPPORTS_BIG_ENDIAN
330 select SYS_SUPPORTS_KGDB
333 select SERIAL_8250_CONSOLE
335 This adds support for the PMC-Sierra family of Multi-Service
336 Processor System-On-A-Chips. These parts include a number
337 of integrated peripherals, interfaces and DSPs in addition to
338 a variety of MIPS cores.
341 bool "PMC-Sierra Yosemite eval board"
350 select SYS_HAS_CPU_RM9000
351 select SYS_HAS_EARLY_PRINTK
352 select SYS_SUPPORTS_32BIT_KERNEL
353 select SYS_SUPPORTS_64BIT_KERNEL
354 select SYS_SUPPORTS_BIG_ENDIAN
355 select SYS_SUPPORTS_HIGHMEM
356 select SYS_SUPPORTS_KGDB
357 select SYS_SUPPORTS_SMP
359 Yosemite is an evaluation board for the RM9000x2 processor
360 manufactured by PMC-Sierra.
363 bool "SGI IP22 (Indy/Indigo2)"
369 select DEFAULT_SGI_PARTITION
370 select DMA_NONCOHERENT
374 select IP22_CPU_SCACHE
376 select GENERIC_ISA_DMA_SUPPORT_BROKEN
377 select SGI_HAS_DS1286
379 select SGI_HAS_INDYDOG
384 select SYS_HAS_CPU_R4X00
385 select SYS_HAS_CPU_R5000
386 select SYS_HAS_EARLY_PRINTK
387 select SYS_SUPPORTS_32BIT_KERNEL
388 select SYS_SUPPORTS_64BIT_KERNEL
389 select SYS_SUPPORTS_BIG_ENDIAN
391 This are the SGI Indy, Challenge S and Indigo2, as well as certain
392 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
393 that runs on these, say Y here.
396 bool "SGI IP27 (Origin200/2000)"
400 select DEFAULT_SGI_PARTITION
402 select SYS_HAS_EARLY_PRINTK
404 select NR_CPUS_DEFAULT_64
405 select SYS_HAS_CPU_R10000
406 select SYS_SUPPORTS_64BIT_KERNEL
407 select SYS_SUPPORTS_BIG_ENDIAN
408 select SYS_SUPPORTS_KGDB
409 select SYS_SUPPORTS_NUMA
410 select SYS_SUPPORTS_SMP
411 select GENERIC_HARDIRQS_NO__DO_IRQ
413 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
414 workstations. To compile a Linux kernel that runs on these, say Y
418 bool "SGI IP28 (Indigo2 R10k) (EXPERIMENTAL)"
419 depends on EXPERIMENTAL
425 select DEFAULT_SGI_PARTITION
426 select DMA_NONCOHERENT
427 select GENERIC_ISA_DMA_SUPPORT_BROKEN
432 select SGI_HAS_DS1286
434 select SGI_HAS_INDYDOG
439 select SYS_HAS_CPU_R10000
440 select SYS_HAS_EARLY_PRINTK
441 select SYS_SUPPORTS_64BIT_KERNEL
442 select SYS_SUPPORTS_BIG_ENDIAN
444 This is the SGI Indigo2 with R10000 processor. To compile a Linux
445 kernel that runs on these, say Y here.
454 select DMA_NONCOHERENT
457 select R5000_CPU_SCACHE
458 select RM7000_CPU_SCACHE
459 select SYS_HAS_CPU_R5000
460 select SYS_HAS_CPU_R10000 if BROKEN
461 select SYS_HAS_CPU_RM7000
462 select SYS_HAS_CPU_NEVADA
463 select SYS_SUPPORTS_64BIT_KERNEL
464 select SYS_SUPPORTS_BIG_ENDIAN
466 If you want this kernel to run on SGI O2 workstation, say Y here.
469 bool "Sibyte BCM91120C-CRhine"
470 depends on EXPERIMENTAL
473 select SIBYTE_BCM1120
475 select SYS_HAS_CPU_SB1
476 select SYS_SUPPORTS_BIG_ENDIAN
477 select SYS_SUPPORTS_LITTLE_ENDIAN
480 bool "Sibyte BCM91120x-Carmel"
481 depends on EXPERIMENTAL
484 select SIBYTE_BCM1120
486 select SYS_HAS_CPU_SB1
487 select SYS_SUPPORTS_BIG_ENDIAN
488 select SYS_SUPPORTS_LITTLE_ENDIAN
491 bool "Sibyte BCM91125C-CRhone"
492 depends on EXPERIMENTAL
495 select SIBYTE_BCM1125
497 select SYS_HAS_CPU_SB1
498 select SYS_SUPPORTS_BIG_ENDIAN
499 select SYS_SUPPORTS_HIGHMEM
500 select SYS_SUPPORTS_LITTLE_ENDIAN
503 bool "Sibyte BCM91125E-Rhone"
504 depends on EXPERIMENTAL
507 select SIBYTE_BCM1125H
509 select SYS_HAS_CPU_SB1
510 select SYS_SUPPORTS_BIG_ENDIAN
511 select SYS_SUPPORTS_LITTLE_ENDIAN
514 bool "Sibyte BCM91250A-SWARM"
517 select NR_CPUS_DEFAULT_2
520 select SYS_HAS_CPU_SB1
521 select SYS_SUPPORTS_BIG_ENDIAN
522 select SYS_SUPPORTS_HIGHMEM
523 select SYS_SUPPORTS_KGDB
524 select SYS_SUPPORTS_LITTLE_ENDIAN
525 select ZONE_DMA32 if 64BIT
527 config SIBYTE_LITTLESUR
528 bool "Sibyte BCM91250C2-LittleSur"
529 depends on EXPERIMENTAL
532 select NR_CPUS_DEFAULT_2
535 select SYS_HAS_CPU_SB1
536 select SYS_SUPPORTS_BIG_ENDIAN
537 select SYS_SUPPORTS_HIGHMEM
538 select SYS_SUPPORTS_LITTLE_ENDIAN
540 config SIBYTE_SENTOSA
541 bool "Sibyte BCM91250E-Sentosa"
542 depends on EXPERIMENTAL
545 select NR_CPUS_DEFAULT_2
548 select SYS_HAS_CPU_SB1
549 select SYS_SUPPORTS_BIG_ENDIAN
550 select SYS_SUPPORTS_LITTLE_ENDIAN
553 bool "Sibyte BCM91480B-BigSur"
556 select NR_CPUS_DEFAULT_4
557 select SIBYTE_BCM1x80
559 select SYS_HAS_CPU_SB1
560 select SYS_SUPPORTS_BIG_ENDIAN
561 select SYS_SUPPORTS_HIGHMEM
562 select SYS_SUPPORTS_LITTLE_ENDIAN
563 select ZONE_DMA32 if 64BIT
566 bool "SNI RM200/300/400"
567 select ARC if CPU_LITTLE_ENDIAN
568 select ARC32 if CPU_LITTLE_ENDIAN
569 select SNIPROM if CPU_BIG_ENDIAN
570 select ARCH_MAY_HAVE_PC_FDC
574 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
575 select DMA_NONCOHERENT
576 select GENERIC_ISA_DMA
583 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
584 select SYS_HAS_CPU_R4X00
585 select SYS_HAS_CPU_R5000
586 select SYS_HAS_CPU_R10000
587 select R5000_CPU_SCACHE
588 select SYS_HAS_EARLY_PRINTK
589 select SYS_SUPPORTS_32BIT_KERNEL
590 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
591 select SYS_SUPPORTS_BIG_ENDIAN
592 select SYS_SUPPORTS_HIGHMEM
593 select SYS_SUPPORTS_LITTLE_ENDIAN
595 The SNI RM200/300/400 are MIPS-based machines manufactured by
596 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
597 Technology and now in turn merged with Fujitsu. Say Y here to
598 support this machine type.
600 config TOSHIBA_JMR3927
601 bool "Toshiba JMR-TX3927 board"
603 select DMA_NONCOHERENT
608 select SYS_HAS_CPU_TX39XX
609 select SYS_SUPPORTS_32BIT_KERNEL
610 select SYS_SUPPORTS_LITTLE_ENDIAN
611 select SYS_SUPPORTS_BIG_ENDIAN
612 select GENERIC_HARDIRQS_NO__DO_IRQ
614 config TOSHIBA_RBTX4927
615 bool "Toshiba RBTX49[23]7 board"
619 select DMA_NONCOHERENT
620 select HAS_TXX9_SERIAL
624 select I8259 if TOSHIBA_FPCIB0
626 select SYS_HAS_CPU_TX49XX
627 select SYS_SUPPORTS_32BIT_KERNEL
628 select SYS_SUPPORTS_64BIT_KERNEL
629 select SYS_SUPPORTS_LITTLE_ENDIAN
630 select SYS_SUPPORTS_BIG_ENDIAN
631 select SYS_SUPPORTS_KGDB
632 select GENERIC_HARDIRQS_NO__DO_IRQ
634 This Toshiba board is based on the TX4927 processor. Say Y here to
635 support this machine type
637 config TOSHIBA_RBTX4938
638 bool "Toshiba RBTX4938 board"
642 select DMA_NONCOHERENT
643 select HAS_TXX9_SERIAL
648 select SYS_HAS_CPU_TX49XX
649 select SYS_SUPPORTS_32BIT_KERNEL
650 select SYS_SUPPORTS_LITTLE_ENDIAN
651 select SYS_SUPPORTS_BIG_ENDIAN
652 select SYS_SUPPORTS_KGDB
653 select GENERIC_HARDIRQS_NO__DO_IRQ
656 This Toshiba board is based on the TX4938 processor. Say Y here to
657 support this machine type
660 bool "Wind River PPMC board"
665 select DMA_NONCOHERENT
667 select PCI_GT64XXX_PCI0
669 select SYS_HAS_CPU_MIPS32_R1
670 select SYS_HAS_CPU_MIPS32_R2
671 select SYS_HAS_CPU_MIPS64_R1
672 select SYS_HAS_CPU_NEVADA
673 select SYS_HAS_CPU_RM7000
674 select SYS_SUPPORTS_32BIT_KERNEL
675 select SYS_SUPPORTS_64BIT_KERNEL
676 select SYS_SUPPORTS_BIG_ENDIAN
677 select SYS_SUPPORTS_LITTLE_ENDIAN
679 This enables support for the Wind River MIPS32 4KC PPMC evaluation
680 board, which is based on GT64120 bridge chip.
684 source "arch/mips/au1000/Kconfig"
685 source "arch/mips/basler/excite/Kconfig"
686 source "arch/mips/jazz/Kconfig"
687 source "arch/mips/lasat/Kconfig"
688 source "arch/mips/pmc-sierra/Kconfig"
689 source "arch/mips/sgi-ip27/Kconfig"
690 source "arch/mips/sibyte/Kconfig"
691 source "arch/mips/tx4927/Kconfig"
692 source "arch/mips/tx4938/Kconfig"
693 source "arch/mips/vr41xx/Kconfig"
697 config RWSEM_GENERIC_SPINLOCK
701 config RWSEM_XCHGADD_ALGORITHM
704 config ARCH_HAS_ILOG2_U32
708 config ARCH_HAS_ILOG2_U64
712 config ARCH_SUPPORTS_OPROFILE
714 default y if !MIPS_MT_SMTC
716 config GENERIC_FIND_NEXT_BIT
720 config GENERIC_HWEIGHT
724 config GENERIC_CALIBRATE_DELAY
728 config GENERIC_CLOCKEVENTS
736 config GENERIC_CMOS_UPDATE
740 config SCHED_NO_NO_OMIT_FRAME_POINTER
744 config GENERIC_HARDIRQS_NO__DO_IRQ
749 # Select some configuration options automatically based on user selections.
754 config ARCH_MAY_HAVE_PC_FDC
793 config DMA_NONCOHERENT
795 select DMA_NEED_PCI_MAP_STATE
797 config DMA_NEED_PCI_MAP_STATE
801 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
802 depends on SYS_HAS_EARLY_PRINTK
805 This option enables special console drivers which allow the kernel
806 to print messages very early in the bootup process.
808 This is useful for kernel debugging when your machine crashes very
809 early before the console code is initialized. For normal operation,
810 it is not recommended because it looks ugly on some machines and
811 doesn't cooperate with an X server. You should normally say N here,
812 unless you want to debug such a crash.
814 config SYS_HAS_EARLY_PRINTK
833 config MIPS_DISABLE_OBSOLETE_IDE
839 config GENERIC_ISA_DMA
841 select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
843 config GENERIC_ISA_DMA_SUPPORT_BROKEN
845 select GENERIC_ISA_DMA
851 # Endianess selection. Sufficiently obscure so many users don't know what to
852 # answer,so we try hard to limit the available choices. Also the use of a
853 # choice statement should be more obvious to the user.
856 prompt "Endianess selection"
858 Some MIPS machines can be configured for either little or big endian
859 byte order. These modes require different kernels and a different
860 Linux distribution. In general there is one preferred byteorder for a
861 particular system but some systems are just as commonly used in the
862 one or the other endianness.
864 config CPU_BIG_ENDIAN
866 depends on SYS_SUPPORTS_BIG_ENDIAN
868 config CPU_LITTLE_ENDIAN
870 depends on SYS_SUPPORTS_LITTLE_ENDIAN
875 config SYS_SUPPORTS_APM_EMULATION
878 config SYS_SUPPORTS_BIG_ENDIAN
881 config SYS_SUPPORTS_LITTLE_ENDIAN
905 config MIPS_BOARDS_GEN
908 config PCI_GT64XXX_PCI0
911 config NO_EXCEPT_FILL
916 select HAS_TXX9_SERIAL
928 select DMA_NONCOHERENT
930 select SYS_HAS_CPU_MIPS32_R1
931 select SYS_HAS_EARLY_PRINTK
932 select SYS_SUPPORTS_32BIT_KERNEL
933 select GENERIC_HARDIRQS_NO__DO_IRQ
934 select SYS_SUPPORTS_KGDB
948 config SGI_HAS_DS1286
951 config SGI_HAS_INDYDOG
966 config DEFAULT_SGI_PARTITION
978 config MIPS_L1_CACHE_SHIFT
980 default "4" if MACH_DECSTATION
981 default "7" if SGI_IP27 || SGI_IP28 || SNI_RM
982 default "4" if PMC_MSP4200_EVAL
985 config HAVE_STD_PC_SERIAL_PORT
989 bool "ARC console support"
990 depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
994 depends on MACH_JAZZ || SNI_RM || SGI_IP32
999 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP28 || SGI_IP32
1008 menu "CPU selection"
1014 config CPU_LOONGSON2
1016 depends on SYS_HAS_CPU_LOONGSON2
1017 select CPU_SUPPORTS_32BIT_KERNEL
1018 select CPU_SUPPORTS_64BIT_KERNEL
1019 select CPU_SUPPORTS_HIGHMEM
1021 The Loongson 2E processor implements the MIPS III instruction set
1022 with many extensions.
1024 config CPU_MIPS32_R1
1025 bool "MIPS32 Release 1"
1026 depends on SYS_HAS_CPU_MIPS32_R1
1028 select CPU_HAS_PREFETCH
1029 select CPU_SUPPORTS_32BIT_KERNEL
1030 select CPU_SUPPORTS_HIGHMEM
1032 Choose this option to build a kernel for release 1 or later of the
1033 MIPS32 architecture. Most modern embedded systems with a 32-bit
1034 MIPS processor are based on a MIPS32 processor. If you know the
1035 specific type of processor in your system, choose those that one
1036 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1037 Release 2 of the MIPS32 architecture is available since several
1038 years so chances are you even have a MIPS32 Release 2 processor
1039 in which case you should choose CPU_MIPS32_R2 instead for better
1042 config CPU_MIPS32_R2
1043 bool "MIPS32 Release 2"
1044 depends on SYS_HAS_CPU_MIPS32_R2
1046 select CPU_HAS_PREFETCH
1047 select CPU_SUPPORTS_32BIT_KERNEL
1048 select CPU_SUPPORTS_HIGHMEM
1050 Choose this option to build a kernel for release 2 or later of the
1051 MIPS32 architecture. Most modern embedded systems with a 32-bit
1052 MIPS processor are based on a MIPS32 processor. If you know the
1053 specific type of processor in your system, choose those that one
1054 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1056 config CPU_MIPS64_R1
1057 bool "MIPS64 Release 1"
1058 depends on SYS_HAS_CPU_MIPS64_R1
1060 select CPU_HAS_PREFETCH
1061 select CPU_SUPPORTS_32BIT_KERNEL
1062 select CPU_SUPPORTS_64BIT_KERNEL
1063 select CPU_SUPPORTS_HIGHMEM
1065 Choose this option to build a kernel for release 1 or later of the
1066 MIPS64 architecture. Many modern embedded systems with a 64-bit
1067 MIPS processor are based on a MIPS64 processor. If you know the
1068 specific type of processor in your system, choose those that one
1069 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1070 Release 2 of the MIPS64 architecture is available since several
1071 years so chances are you even have a MIPS64 Release 2 processor
1072 in which case you should choose CPU_MIPS64_R2 instead for better
1075 config CPU_MIPS64_R2
1076 bool "MIPS64 Release 2"
1077 depends on SYS_HAS_CPU_MIPS64_R2
1079 select CPU_HAS_PREFETCH
1080 select CPU_SUPPORTS_32BIT_KERNEL
1081 select CPU_SUPPORTS_64BIT_KERNEL
1082 select CPU_SUPPORTS_HIGHMEM
1084 Choose this option to build a kernel for release 2 or later of the
1085 MIPS64 architecture. Many modern embedded systems with a 64-bit
1086 MIPS processor are based on a MIPS64 processor. If you know the
1087 specific type of processor in your system, choose those that one
1088 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1092 depends on SYS_HAS_CPU_R3000
1094 select CPU_SUPPORTS_32BIT_KERNEL
1095 select CPU_SUPPORTS_HIGHMEM
1097 Please make sure to pick the right CPU type. Linux/MIPS is not
1098 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
1099 *not* work on R4000 machines and vice versa. However, since most
1100 of the supported machines have an R4000 (or similar) CPU, R4x00
1101 might be a safe bet. If the resulting kernel does not work,
1102 try to recompile with R3000.
1106 depends on SYS_HAS_CPU_TX39XX
1107 select CPU_SUPPORTS_32BIT_KERNEL
1111 depends on SYS_HAS_CPU_VR41XX
1112 select CPU_SUPPORTS_32BIT_KERNEL
1113 select CPU_SUPPORTS_64BIT_KERNEL
1115 The options selects support for the NEC VR4100 series of processors.
1116 Only choose this option if you have one of these processors as a
1117 kernel built with this option will not run on any other type of
1118 processor or vice versa.
1122 depends on SYS_HAS_CPU_R4300
1124 select CPU_SUPPORTS_32BIT_KERNEL
1125 select CPU_SUPPORTS_64BIT_KERNEL
1127 MIPS Technologies R4300-series processors.
1131 depends on SYS_HAS_CPU_R4X00
1133 select CPU_SUPPORTS_32BIT_KERNEL
1134 select CPU_SUPPORTS_64BIT_KERNEL
1136 MIPS Technologies R4000-series processors other than 4300, including
1137 the R4000, R4400, R4600, and 4700.
1141 depends on SYS_HAS_CPU_TX49XX
1143 select CPU_HAS_PREFETCH
1144 select CPU_SUPPORTS_32BIT_KERNEL
1145 select CPU_SUPPORTS_64BIT_KERNEL
1149 depends on SYS_HAS_CPU_R5000
1151 select CPU_SUPPORTS_32BIT_KERNEL
1152 select CPU_SUPPORTS_64BIT_KERNEL
1154 MIPS Technologies R5000-series processors other than the Nevada.
1158 depends on SYS_HAS_CPU_R5432
1160 select CPU_SUPPORTS_32BIT_KERNEL
1161 select CPU_SUPPORTS_64BIT_KERNEL
1165 depends on EXPERIMENTAL
1167 depends on SYS_HAS_CPU_R6000
1168 select CPU_SUPPORTS_32BIT_KERNEL
1170 MIPS Technologies R6000 and R6000A series processors. Note these
1171 processors are extremely rare and the support for them is incomplete.
1175 depends on SYS_HAS_CPU_NEVADA
1177 select CPU_SUPPORTS_32BIT_KERNEL
1178 select CPU_SUPPORTS_64BIT_KERNEL
1180 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1184 depends on EXPERIMENTAL
1185 depends on SYS_HAS_CPU_R8000
1187 select CPU_HAS_PREFETCH
1188 select CPU_SUPPORTS_64BIT_KERNEL
1190 MIPS Technologies R8000 processors. Note these processors are
1191 uncommon and the support for them is incomplete.
1195 depends on SYS_HAS_CPU_R10000
1197 select CPU_HAS_PREFETCH
1198 select CPU_SUPPORTS_32BIT_KERNEL
1199 select CPU_SUPPORTS_64BIT_KERNEL
1200 select CPU_SUPPORTS_HIGHMEM
1202 MIPS Technologies R10000-series processors.
1206 depends on SYS_HAS_CPU_RM7000
1208 select CPU_HAS_PREFETCH
1209 select CPU_SUPPORTS_32BIT_KERNEL
1210 select CPU_SUPPORTS_64BIT_KERNEL
1211 select CPU_SUPPORTS_HIGHMEM
1215 depends on SYS_HAS_CPU_RM9000
1217 select CPU_HAS_PREFETCH
1218 select CPU_SUPPORTS_32BIT_KERNEL
1219 select CPU_SUPPORTS_64BIT_KERNEL
1220 select CPU_SUPPORTS_HIGHMEM
1221 select WEAK_ORDERING
1225 depends on SYS_HAS_CPU_SB1
1227 select CPU_SUPPORTS_32BIT_KERNEL
1228 select CPU_SUPPORTS_64BIT_KERNEL
1229 select CPU_SUPPORTS_HIGHMEM
1230 select WEAK_ORDERING
1234 config SYS_HAS_CPU_LOONGSON2
1237 config SYS_HAS_CPU_MIPS32_R1
1240 config SYS_HAS_CPU_MIPS32_R2
1243 config SYS_HAS_CPU_MIPS64_R1
1246 config SYS_HAS_CPU_MIPS64_R2
1249 config SYS_HAS_CPU_R3000
1252 config SYS_HAS_CPU_TX39XX
1255 config SYS_HAS_CPU_VR41XX
1258 config SYS_HAS_CPU_R4300
1261 config SYS_HAS_CPU_R4X00
1264 config SYS_HAS_CPU_TX49XX
1267 config SYS_HAS_CPU_R5000
1270 config SYS_HAS_CPU_R5432
1273 config SYS_HAS_CPU_R6000
1276 config SYS_HAS_CPU_NEVADA
1279 config SYS_HAS_CPU_R8000
1282 config SYS_HAS_CPU_R10000
1285 config SYS_HAS_CPU_RM7000
1288 config SYS_HAS_CPU_RM9000
1291 config SYS_HAS_CPU_SB1
1295 # CPU may reorder R->R, R->W, W->R, W->W
1296 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1298 config WEAK_ORDERING
1302 # CPU may reorder reads and writes beyond LL/SC
1303 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1305 config WEAK_REORDERING_BEYOND_LLSC
1310 # These two indicate any level of the MIPS32 and MIPS64 architecture
1314 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1318 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1321 # These two indicate the revision of the architecture, either Release 1 or Release 2
1325 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1329 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2
1331 config SYS_SUPPORTS_32BIT_KERNEL
1333 config SYS_SUPPORTS_64BIT_KERNEL
1335 config CPU_SUPPORTS_32BIT_KERNEL
1337 config CPU_SUPPORTS_64BIT_KERNEL
1344 prompt "Kernel code model"
1346 You should only select this option if you have a workload that
1347 actually benefits from 64-bit processing or if your machine has
1348 large memory. You will only be presented a single option in this
1349 menu if your system does not support both 32-bit and 64-bit kernels.
1352 bool "32-bit kernel"
1353 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1356 Select this option if you want to build a 32-bit kernel.
1358 bool "64-bit kernel"
1359 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1361 Select this option if you want to build a 64-bit kernel.
1366 prompt "Kernel page size"
1367 default PAGE_SIZE_4KB
1369 config PAGE_SIZE_4KB
1372 This option select the standard 4kB Linux page size. On some
1373 R3000-family processors this is the only available page size. Using
1374 4kB page size will minimize memory consumption and is therefore
1375 recommended for low memory systems.
1377 config PAGE_SIZE_8KB
1379 depends on EXPERIMENTAL && CPU_R8000
1381 Using 8kB page size will result in higher performance kernel at
1382 the price of higher memory consumption. This option is available
1383 only on the R8000 processor. Not that at the time of this writing
1384 this option is still high experimental; there are also issues with
1385 compatibility of user applications.
1387 config PAGE_SIZE_16KB
1389 depends on !CPU_R3000 && !CPU_TX39XX
1391 Using 16kB page size will result in higher performance kernel at
1392 the price of higher memory consumption. This option is available on
1393 all non-R3000 family processors. Note that you will need a suitable
1394 Linux distribution to support this.
1396 config PAGE_SIZE_64KB
1398 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1400 Using 64kB page size will result in higher performance kernel at
1401 the price of higher memory consumption. This option is available on
1402 all non-R3000 family processor. Not that at the time of this
1403 writing this option is still high experimental.
1410 config IP22_CPU_SCACHE
1415 # Support for a MIPS32 / MIPS64 style S-caches
1417 config MIPS_CPU_SCACHE
1421 config R5000_CPU_SCACHE
1425 config RM7000_CPU_SCACHE
1429 config SIBYTE_DMA_PAGEOPS
1430 bool "Use DMA to clear/copy pages"
1433 Instead of using the CPU to zero and copy pages, use a Data Mover
1434 channel. These DMA channels are otherwise unused by the standard
1435 SiByte Linux port. Seems to give a small performance benefit.
1437 config CPU_HAS_PREFETCH
1441 prompt "MIPS MT options"
1443 config MIPS_MT_DISABLED
1444 bool "Disable multithreading support."
1446 Use this option if your workload can't take advantage of
1447 MIPS hardware multithreading support. On systems that don't have
1448 the option of an MT-enabled processor this option will be the only
1449 option in this menu.
1452 bool "Use 1 TC on each available VPE for SMP"
1453 depends on SYS_SUPPORTS_MULTITHREADING
1454 select CPU_MIPSR2_IRQ_VI
1455 select CPU_MIPSR2_IRQ_EI
1457 select NR_CPUS_DEFAULT_2
1459 select SYS_SUPPORTS_SCHED_SMT if SMP
1460 select SYS_SUPPORTS_SMP
1463 This is a kernel model which is also known a VSMP or lately
1464 has been marketesed into SMVP.
1467 bool "SMTC: Use all TCs on all VPEs for SMP"
1468 depends on CPU_MIPS32_R2
1469 #depends on CPU_MIPS64_R2 # once there is hardware ...
1470 depends on SYS_SUPPORTS_MULTITHREADING
1471 select GENERIC_CLOCKEVENTS_BROADCAST
1472 select CPU_MIPSR2_IRQ_VI
1473 select CPU_MIPSR2_IRQ_EI
1475 select NR_CPUS_DEFAULT_8
1477 select SYS_SUPPORTS_SMP
1480 This is a kernel model which is known a SMTC or lately has been
1481 marketesed into SMVP.
1489 bool "SMT (multithreading) scheduler support"
1490 depends on SYS_SUPPORTS_SCHED_SMT
1493 SMT scheduler support improves the CPU scheduler's decision making
1494 when dealing with MIPS MT enabled cores at a cost of slightly
1495 increased overhead in some places. If unsure say N here.
1497 config SYS_SUPPORTS_SCHED_SMT
1501 config SYS_SUPPORTS_MULTITHREADING
1504 config MIPS_MT_FPAFF
1505 bool "Dynamic FPU affinity for FP-intensive threads"
1507 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1509 config MIPS_VPE_LOADER
1510 bool "VPE loader support."
1511 depends on SYS_SUPPORTS_MULTITHREADING
1512 select CPU_MIPSR2_IRQ_VI
1513 select CPU_MIPSR2_IRQ_EI
1516 Includes a loader for loading an elf relocatable object
1517 onto another VPE and running it.
1519 config MIPS_MT_SMTC_INSTANT_REPLAY
1520 bool "Low-latency Dispatch of Deferred SMTC IPIs"
1521 depends on MIPS_MT_SMTC && !PREEMPT
1524 SMTC pseudo-interrupts between TCs are deferred and queued
1525 if the target TC is interrupt-inhibited (IXMT). In the first
1526 SMTC prototypes, these queued IPIs were serviced on return
1527 to user mode, or on entry into the kernel idle loop. The
1528 INSTANT_REPLAY option dispatches them as part of local_irq_restore()
1529 processing, which adds runtime overhead (hence the option to turn
1530 it off), but ensures that IPIs are handled promptly even under
1531 heavy I/O interrupt load.
1533 config MIPS_MT_SMTC_IM_BACKSTOP
1534 bool "Use per-TC register bits as backstop for inhibited IM bits"
1535 depends on MIPS_MT_SMTC
1538 To support multiple TC microthreads acting as "CPUs" within
1539 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1540 during interrupt handling. To support legacy drivers and interrupt
1541 controller management code, SMTC has a "backstop" to track and
1542 if necessary restore the interrupt mask. This has some performance
1543 impact on interrupt service overhead. Disable it only if you know
1546 config MIPS_MT_SMTC_IRQAFF
1547 bool "Support IRQ affinity API"
1548 depends on MIPS_MT_SMTC
1551 Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.)
1552 for SMTC Linux kernel. Requires platform support, of which
1553 an example can be found in the MIPS kernel i8259 and Malta
1554 platform code. It is recommended that MIPS_MT_SMTC_INSTANT_REPLAY
1555 be enabled if MIPS_MT_SMTC_IRQAFF is used. Adds overhead to
1556 interrupt dispatch, and should be used only if you know what
1559 config MIPS_VPE_LOADER_TOM
1560 bool "Load VPE program into memory hidden from linux"
1561 depends on MIPS_VPE_LOADER
1564 The loader can use memory that is present but has been hidden from
1565 Linux using the kernel command line option "mem=xxMB". It's up to
1566 you to ensure the amount you put in the option and the space your
1567 program requires is less or equal to the amount physically present.
1569 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1570 config MIPS_VPE_APSP_API
1571 bool "Enable support for AP/SP API (RTLX)"
1572 depends on MIPS_VPE_LOADER
1575 config MIPS_APSP_KSPD
1577 depends on MIPS_VPE_APSP_API
1580 KSPD is a kernel daemon that accepts syscall requests from the SP
1581 side, actions them and returns the results. It also handles the
1582 "exit" syscall notifying other kernel modules the SP program is
1583 exiting. You probably want to say yes here.
1585 config SB1_PASS_1_WORKAROUNDS
1587 depends on CPU_SB1_PASS_1
1590 config SB1_PASS_2_WORKAROUNDS
1592 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1595 config SB1_PASS_2_1_WORKAROUNDS
1597 depends on CPU_SB1 && CPU_SB1_PASS_2
1600 config 64BIT_PHYS_ADDR
1606 config CPU_HAS_SMARTMIPS
1607 depends on SYS_SUPPORTS_SMARTMIPS
1608 bool "Support for the SmartMIPS ASE"
1610 SmartMIPS is a extension of the MIPS32 architecture aimed at
1611 increased security at both hardware and software level for
1612 smartcards. Enabling this option will allow proper use of the
1613 SmartMIPS instructions by Linux applications. However a kernel with
1614 this option will not work on a MIPS core without SmartMIPS core. If
1615 you don't know you probably don't have SmartMIPS and should say N
1622 # Vectored interrupt mode is an R2 feature
1624 config CPU_MIPSR2_IRQ_VI
1628 # Extended interrupt mode is an R2 feature
1630 config CPU_MIPSR2_IRQ_EI
1635 depends on !CPU_R3000
1638 config GENERIC_CLOCKEVENTS_BROADCAST
1644 config CPU_DADDI_WORKAROUNDS
1647 config CPU_R4000_WORKAROUNDS
1649 select CPU_R4400_WORKAROUNDS
1651 config CPU_R4400_WORKAROUNDS
1655 # Use the generic interrupt handling code in kernel/irq/:
1657 config GENERIC_HARDIRQS
1661 config GENERIC_IRQ_PROBE
1669 # - Highmem only makes sense for the 32-bit kernel.
1670 # - The current highmem code will only work properly on physically indexed
1671 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1672 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1673 # moment we protect the user and offer the highmem option only on machines
1674 # where it's known to be safe. This will not offer highmem on a few systems
1675 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1676 # indexed CPUs but we're playing safe.
1677 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1678 # know they might have memory configurations that could make use of highmem
1682 bool "High Memory Support"
1683 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1685 config CPU_SUPPORTS_HIGHMEM
1688 config SYS_SUPPORTS_HIGHMEM
1691 config SYS_SUPPORTS_SMARTMIPS
1694 config ARCH_FLATMEM_ENABLE
1698 config ARCH_DISCONTIGMEM_ENABLE
1700 default y if SGI_IP27
1702 Say Y to support efficient handling of discontiguous physical memory,
1703 for architectures which are either NUMA (Non-Uniform Memory Access)
1704 or have huge holes in the physical address space for other reasons.
1705 See <file:Documentation/vm/numa> for more.
1707 config ARCH_POPULATES_NODE_MAP
1710 config ARCH_SPARSEMEM_ENABLE
1712 select SPARSEMEM_STATIC
1716 depends on SYS_SUPPORTS_NUMA
1718 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1719 Access). This option improves performance on systems with more
1720 than two nodes; on two node systems it is generally better to
1721 leave it disabled; on single node systems disable this option
1724 config SYS_SUPPORTS_NUMA
1730 depends on NEED_MULTIPLE_NODES
1735 bool "Multi-Processing support"
1736 depends on SYS_SUPPORTS_SMP
1739 This enables support for systems with more than one CPU. If you have
1740 a system with only one CPU, like most personal computers, say N. If
1741 you have a system with more than one CPU, say Y.
1743 If you say N here, the kernel will run on single and multiprocessor
1744 machines, but will use only one CPU of a multiprocessor machine. If
1745 you say Y here, the kernel will run on many, but not all,
1746 singleprocessor machines. On a singleprocessor machine, the kernel
1747 will run faster if you say N here.
1749 People using multiprocessor machines who say Y here should also say
1750 Y to "Enhanced Real Time Clock Support", below.
1752 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
1753 available at <http://www.tldp.org/docs.html#howto>.
1755 If you don't know what to do here, say N.
1760 config SYS_SUPPORTS_SMP
1763 config NR_CPUS_DEFAULT_1
1766 config NR_CPUS_DEFAULT_2
1769 config NR_CPUS_DEFAULT_4
1772 config NR_CPUS_DEFAULT_8
1775 config NR_CPUS_DEFAULT_16
1778 config NR_CPUS_DEFAULT_32
1781 config NR_CPUS_DEFAULT_64
1785 int "Maximum number of CPUs (2-64)"
1786 range 1 64 if NR_CPUS_DEFAULT_1
1788 default "1" if NR_CPUS_DEFAULT_1
1789 default "2" if NR_CPUS_DEFAULT_2
1790 default "4" if NR_CPUS_DEFAULT_4
1791 default "8" if NR_CPUS_DEFAULT_8
1792 default "16" if NR_CPUS_DEFAULT_16
1793 default "32" if NR_CPUS_DEFAULT_32
1794 default "64" if NR_CPUS_DEFAULT_64
1796 This allows you to specify the maximum number of CPUs which this
1797 kernel will support. The maximum supported value is 32 for 32-bit
1798 kernel and 64 for 64-bit kernels; the minimum value which makes
1799 sense is 1 for Qemu (useful only for kernel debugging purposes)
1800 and 2 for all others.
1802 This is purely to save memory - each supported CPU adds
1803 approximately eight kilobytes to the kernel image. For best
1804 performance should round up your number of processors to the next
1807 source "kernel/time/Kconfig"
1810 # Timer Interrupt Frequency Configuration
1814 prompt "Timer frequency"
1817 Allows the configuration of the timer frequency.
1820 bool "48 HZ" if SYS_SUPPORTS_48HZ
1823 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1826 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1829 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1832 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1835 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1838 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1842 config SYS_SUPPORTS_48HZ
1845 config SYS_SUPPORTS_100HZ
1848 config SYS_SUPPORTS_128HZ
1851 config SYS_SUPPORTS_250HZ
1854 config SYS_SUPPORTS_256HZ
1857 config SYS_SUPPORTS_1000HZ
1860 config SYS_SUPPORTS_1024HZ
1863 config SYS_SUPPORTS_ARBIT_HZ
1865 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1866 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1867 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1868 !SYS_SUPPORTS_1024HZ
1873 default 100 if HZ_100
1874 default 128 if HZ_128
1875 default 250 if HZ_250
1876 default 256 if HZ_256
1877 default 1000 if HZ_1000
1878 default 1024 if HZ_1024
1880 source "kernel/Kconfig.preempt"
1882 config MIPS_INSANE_LARGE
1883 bool "Support for large 64-bit configurations"
1884 depends on CPU_R10000 && 64BIT
1886 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1887 previous 64-bit processors which only supported 40 bit / 1TB. If you
1888 need processes of more than 1TB virtual address space, say Y here.
1889 This will result in additional memory usage, so it is not
1890 recommended for normal users.
1893 bool "Kexec system call (EXPERIMENTAL)"
1894 depends on EXPERIMENTAL
1896 kexec is a system call that implements the ability to shutdown your
1897 current kernel, and to start another kernel. It is like a reboot
1898 but it is independent of the system firmware. And like a reboot
1899 you can start any kernel with it, not just Linux.
1901 The name comes from the similarity to the exec system call.
1903 It is an ongoing process to be certain the hardware in a machine
1904 is properly shutdown, so do not be surprised if this code does not
1905 initially work for you. It may help to enable device hotplugging
1906 support. As of this writing the exact hardware interface is
1907 strongly in flux, so no good recommendation can be made.
1910 bool "Enable seccomp to safely compute untrusted bytecode"
1914 This kernel feature is useful for number crunching applications
1915 that may need to compute untrusted bytecode during their
1916 execution. By using pipes or other transports made available to
1917 the process as file descriptors supporting the read/write
1918 syscalls, it's possible to isolate those applications in
1919 their own address space using seccomp. Once seccomp is
1920 enabled via /proc/<pid>/seccomp, it cannot be disabled
1921 and the task is only allowed to execute a few safe syscalls
1922 defined by each seccomp mode.
1924 If unsure, say Y. Only embedded should say N here.
1928 config RWSEM_GENERIC_SPINLOCK
1932 config LOCKDEP_SUPPORT
1936 config STACKTRACE_SUPPORT
1940 source "init/Kconfig"
1942 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1950 bool "Support for PCI controller"
1951 depends on HW_HAS_PCI
1954 Find out whether you have a PCI motherboard. PCI is the name of a
1955 bus system, i.e. the way the CPU talks to the other stuff inside
1956 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
1959 The PCI-HOWTO, available from
1960 <http://www.tldp.org/docs.html#howto>, contains valuable
1961 information about which PCI hardware does work under Linux and which
1967 source "drivers/pci/Kconfig"
1970 # ISA support is now enabled via select. Too many systems still have the one
1971 # or other ISA chip on the board that users don't know about so don't expect
1972 # users to choose the right thing ...
1979 depends on HW_HAS_EISA
1981 select GENERIC_ISA_DMA
1983 The Extended Industry Standard Architecture (EISA) bus was
1984 developed as an open alternative to the IBM MicroChannel bus.
1986 The EISA bus provided some of the features of the IBM MicroChannel
1987 bus while maintaining backward compatibility with cards made for
1988 the older ISA bus. The EISA bus saw limited use between 1988 and
1989 1995 when it was made obsolete by the PCI bus.
1991 Say Y here if you are building a kernel for an EISA-based machine.
1995 source "drivers/eisa/Kconfig"
1998 bool "TURBOchannel support"
1999 depends on MACH_DECSTATION
2001 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
2002 processors. Documentation on writing device drivers for TurboChannel
2004 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
2007 # bool "Access.Bus support"
2020 source "drivers/pcmcia/Kconfig"
2022 source "drivers/pci/hotplug/Kconfig"
2026 menu "Executable file formats"
2028 source "fs/Kconfig.binfmt"
2034 bool "Include IRIX binary compatibility"
2035 depends on CPU_BIG_ENDIAN && 32BIT && BROKEN
2037 config MIPS32_COMPAT
2038 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
2041 Select this option if you want Linux/MIPS 32-bit binary
2042 compatibility. Since all software available for Linux/MIPS is
2043 currently 32-bit you should say Y here.
2047 depends on MIPS32_COMPAT
2050 config SYSVIPC_COMPAT
2052 depends on COMPAT && SYSVIPC
2056 bool "Kernel support for o32 binaries"
2057 depends on MIPS32_COMPAT
2059 Select this option if you want to run o32 binaries. These are pure
2060 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
2061 existing binaries are in this format.
2066 bool "Kernel support for n32 binaries"
2067 depends on MIPS32_COMPAT
2069 Select this option if you want to run n32 binaries. These are
2070 64-bit binaries using 32-bit quantities for addressing and certain
2071 data that would normally be 64-bit. They are used in special
2078 default y if MIPS32_O32 || MIPS32_N32
2082 menu "Power management options"
2084 source "kernel/power/Kconfig"
2088 source "net/Kconfig"
2090 source "drivers/Kconfig"
2094 source "kernel/Kconfig.instrumentation"
2096 source "arch/mips/Kconfig.debug"
2098 source "security/Kconfig"
2100 source "crypto/Kconfig"
2102 source "lib/Kconfig"