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.
40 config BASLER_EXCITE_PROTOTYPE
41 bool "Support for pre-release units"
42 depends on BASLER_EXCITE
45 Pre-series (prototype) units are different from later ones in
46 some ways. Select this option if you have one of these. Please
47 note that a kernel built with this option selected will not be
48 able to run on normal units.
51 bool "BCM47XX based boards"
54 select DMA_NONCOHERENT
57 select SYS_HAS_CPU_MIPS32_R1
58 select SYS_SUPPORTS_32BIT_KERNEL
59 select SYS_SUPPORTS_LITTLE_ENDIAN
61 select SSB_DRIVER_MIPS
63 select SYS_HAS_EARLY_PRINTK
66 Support for BCM47XX based boards
73 select DMA_NONCOHERENT
79 select PCI_GT64XXX_PCI0
80 select SYS_HAS_CPU_NEVADA
81 select SYS_HAS_EARLY_PRINTK
82 select SYS_SUPPORTS_32BIT_KERNEL
83 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
84 select SYS_SUPPORTS_LITTLE_ENDIAN
85 select GENERIC_HARDIRQS_NO__DO_IRQ
87 config MACH_DECSTATION
92 select DMA_NONCOHERENT
95 select SYS_HAS_CPU_R3000
96 select SYS_HAS_CPU_R4X00
97 select SYS_SUPPORTS_32BIT_KERNEL
98 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
99 select SYS_SUPPORTS_LITTLE_ENDIAN
100 select SYS_SUPPORTS_128HZ
101 select SYS_SUPPORTS_256HZ
102 select SYS_SUPPORTS_1024HZ
104 This enables support for DEC's MIPS based workstations. For details
105 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
106 DECstation porting pages on <http://decstation.unix-ag.org/>.
108 If you have one of the following DECstation Models you definitely
109 want to choose R4xx0 for the CPU Type:
116 otherwise choose R3000.
119 bool "Jazz family of machines"
122 select ARCH_MAY_HAVE_PC_FDC
125 select GENERIC_ISA_DMA
131 select SYS_HAS_CPU_R4X00
132 select SYS_SUPPORTS_32BIT_KERNEL
133 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
134 select SYS_SUPPORTS_100HZ
135 select GENERIC_HARDIRQS_NO__DO_IRQ
137 This a family of machines based on the MIPS R4030 chipset which was
138 used by several vendors to build RISC/os and Windows NT workstations.
139 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millenium and
140 Olivetti M700-10 workstations.
143 bool "LASAT Networks platforms"
146 select DMA_NONCOHERENT
147 select SYS_HAS_EARLY_PRINTK
150 select PCI_GT64XXX_PCI0
152 select R5000_CPU_SCACHE
153 select SYS_HAS_CPU_R5000
154 select SYS_SUPPORTS_32BIT_KERNEL
155 select SYS_SUPPORTS_64BIT_KERNEL if BROKEN
156 select SYS_SUPPORTS_LITTLE_ENDIAN
157 select GENERIC_HARDIRQS_NO__DO_IRQ
160 bool "Lemote Fulong mini-PC"
161 select ARCH_SPARSEMEM_ENABLE
164 select SYS_HAS_CPU_LOONGSON2
165 select DMA_NONCOHERENT
168 select HAVE_STD_PC_SERIAL_PORT
173 select SYS_SUPPORTS_32BIT_KERNEL
174 select SYS_SUPPORTS_64BIT_KERNEL
175 select SYS_SUPPORTS_LITTLE_ENDIAN
176 select SYS_SUPPORTS_HIGHMEM
177 select SYS_HAS_EARLY_PRINTK
178 select GENERIC_HARDIRQS_NO__DO_IRQ
179 select GENERIC_ISA_DMA_SUPPORT_BROKEN
182 Lemote Fulong mini-PC board based on the Chinese Loongson-2E CPU and
186 bool "MIPS Atlas board"
190 select DMA_NONCOHERENT
191 select SYS_HAS_EARLY_PRINTK
194 select MIPS_BOARDS_GEN
196 select PCI_GT64XXX_PCI0
198 select RM7000_CPU_SCACHE
200 select SYS_HAS_CPU_MIPS32_R1
201 select SYS_HAS_CPU_MIPS32_R2
202 select SYS_HAS_CPU_MIPS64_R1
203 select SYS_HAS_CPU_NEVADA
204 select SYS_HAS_CPU_RM7000
205 select SYS_SUPPORTS_32BIT_KERNEL
206 select SYS_SUPPORTS_64BIT_KERNEL
207 select SYS_SUPPORTS_BIG_ENDIAN
208 select SYS_SUPPORTS_LITTLE_ENDIAN
209 select SYS_SUPPORTS_MULTITHREADING if EXPERIMENTAL
210 select SYS_SUPPORTS_SMARTMIPS
211 select GENERIC_HARDIRQS_NO__DO_IRQ
213 This enables support for the MIPS Technologies Atlas evaluation
217 bool "MIPS Malta board"
218 select ARCH_MAY_HAVE_PC_FDC
222 select DMA_NONCOHERENT
223 select GENERIC_ISA_DMA
228 select MIPS_BOARDS_GEN
230 select MIPS_CPU_SCACHE
231 select PCI_GT64XXX_PCI0
234 select SYS_HAS_CPU_MIPS32_R1
235 select SYS_HAS_CPU_MIPS32_R2
236 select SYS_HAS_CPU_MIPS64_R1
237 select SYS_HAS_CPU_NEVADA
238 select SYS_HAS_CPU_RM7000
239 select SYS_HAS_EARLY_PRINTK
240 select SYS_SUPPORTS_32BIT_KERNEL
241 select SYS_SUPPORTS_64BIT_KERNEL
242 select SYS_SUPPORTS_BIG_ENDIAN
243 select SYS_SUPPORTS_LITTLE_ENDIAN
244 select SYS_SUPPORTS_MULTITHREADING
245 select SYS_SUPPORTS_SMARTMIPS
247 This enables support for the MIPS Technologies Malta evaluation
251 bool "MIPS SEAD board"
255 select DMA_NONCOHERENT
256 select SYS_HAS_EARLY_PRINTK
257 select MIPS_BOARDS_GEN
258 select SYS_HAS_CPU_MIPS32_R1
259 select SYS_HAS_CPU_MIPS32_R2
260 select SYS_HAS_CPU_MIPS64_R1
261 select SYS_SUPPORTS_32BIT_KERNEL
262 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
263 select SYS_SUPPORTS_BIG_ENDIAN
264 select SYS_SUPPORTS_LITTLE_ENDIAN
265 select SYS_SUPPORTS_SMARTMIPS
267 This enables support for the MIPS Technologies SEAD evaluation
271 bool 'MIPS simulator (MIPSsim)'
274 select DMA_NONCOHERENT
275 select SYS_HAS_EARLY_PRINTK
278 select SYS_HAS_CPU_MIPS32_R1
279 select SYS_HAS_CPU_MIPS32_R2
280 select SYS_HAS_EARLY_PRINTK
281 select SYS_SUPPORTS_32BIT_KERNEL
282 select SYS_SUPPORTS_BIG_ENDIAN
283 select SYS_SUPPORTS_MULTITHREADING
284 select SYS_SUPPORTS_LITTLE_ENDIAN
286 This option enables support for MIPS Technologies MIPSsim software
290 bool "NEC EMMA2RH Mark-eins"
293 select DMA_NONCOHERENT
297 select SYS_SUPPORTS_32BIT_KERNEL
298 select SYS_SUPPORTS_BIG_ENDIAN
299 select SYS_SUPPORTS_LITTLE_ENDIAN
300 select SYS_HAS_CPU_R5000
302 This enables support for the R5432-based NEC Mark-eins
303 boards with R5500 CPU.
306 bool "NEC VR4100 series based machines"
309 select SYS_HAS_CPU_VR41XX
310 select GENERIC_HARDIRQS_NO__DO_IRQ
313 bool "Philips PNX8550 based JBS board"
315 select SYS_SUPPORTS_LITTLE_ENDIAN
317 config PNX8550_STB810
318 bool "Philips PNX8550 based STB810 board"
320 select SYS_SUPPORTS_LITTLE_ENDIAN
323 bool "PMC-Sierra MSP chipsets"
324 depends on EXPERIMENTAL
325 select DMA_NONCOHERENT
327 select NO_EXCEPT_FILL
329 select SYS_HAS_CPU_MIPS32_R1
330 select SYS_HAS_CPU_MIPS32_R2
331 select SYS_SUPPORTS_32BIT_KERNEL
332 select SYS_SUPPORTS_BIG_ENDIAN
333 select SYS_SUPPORTS_KGDB
336 select SERIAL_8250_CONSOLE
338 This adds support for the PMC-Sierra family of Multi-Service
339 Processor System-On-A-Chips. These parts include a number
340 of integrated peripherals, interfaces and DSPs in addition to
341 a variety of MIPS cores.
344 bool "PMC-Sierra Yosemite eval board"
353 select SYS_HAS_CPU_RM9000
354 select SYS_HAS_EARLY_PRINTK
355 select SYS_SUPPORTS_32BIT_KERNEL
356 select SYS_SUPPORTS_64BIT_KERNEL
357 select SYS_SUPPORTS_BIG_ENDIAN
358 select SYS_SUPPORTS_HIGHMEM
359 select SYS_SUPPORTS_KGDB
360 select SYS_SUPPORTS_SMP
362 Yosemite is an evaluation board for the RM9000x2 processor
363 manufactured by PMC-Sierra.
370 select GENERIC_ISA_DMA
371 select HAVE_STD_PC_SERIAL_PORT
378 select SYS_HAS_CPU_MIPS32_R1
379 select SYS_HAS_EARLY_PRINTK
380 select SYS_SUPPORTS_32BIT_KERNEL
381 select SYS_SUPPORTS_BIG_ENDIAN
382 select SYS_SUPPORTS_LITTLE_ENDIAN
383 select GENERIC_HARDIRQS_NO__DO_IRQ
384 select NR_CPUS_DEFAULT_1
385 select SYS_SUPPORTS_SMP
387 Qemu is a software emulator which among other architectures also
388 can simulate a MIPS32 4Kc system. This patch adds support for the
389 system architecture that currently is being simulated by Qemu. It
390 will eventually be removed again when Qemu has the capability to
391 simulate actual MIPS hardware platforms. More information on Qemu
392 can be found at http://www.linux-mips.org/wiki/Qemu.
395 bool "SGI IP22 (Indy/Indigo2)"
401 select DMA_NONCOHERENT
405 select IP22_CPU_SCACHE
407 select GENERIC_ISA_DMA_SUPPORT_BROKEN
409 select SYS_HAS_CPU_R4X00
410 select SYS_HAS_CPU_R5000
411 select SYS_HAS_EARLY_PRINTK
412 select SYS_SUPPORTS_32BIT_KERNEL
413 select SYS_SUPPORTS_64BIT_KERNEL
414 select SYS_SUPPORTS_BIG_ENDIAN
416 This are the SGI Indy, Challenge S and Indigo2, as well as certain
417 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
418 that runs on these, say Y here.
421 bool "SGI IP27 (Origin200/2000)"
426 select SYS_HAS_EARLY_PRINTK
428 select NR_CPUS_DEFAULT_64
429 select SYS_HAS_CPU_R10000
430 select SYS_SUPPORTS_64BIT_KERNEL
431 select SYS_SUPPORTS_BIG_ENDIAN
432 select SYS_SUPPORTS_KGDB
433 select SYS_SUPPORTS_NUMA
434 select SYS_SUPPORTS_SMP
435 select GENERIC_HARDIRQS_NO__DO_IRQ
437 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
438 workstations. To compile a Linux kernel that runs on these, say Y
448 select DMA_NONCOHERENT
451 select R5000_CPU_SCACHE
452 select RM7000_CPU_SCACHE
453 select SYS_HAS_CPU_R5000
454 select SYS_HAS_CPU_R10000 if BROKEN
455 select SYS_HAS_CPU_RM7000
456 select SYS_HAS_CPU_NEVADA
457 select SYS_SUPPORTS_64BIT_KERNEL
458 select SYS_SUPPORTS_BIG_ENDIAN
460 If you want this kernel to run on SGI O2 workstation, say Y here.
463 bool "Sibyte BCM91120C-CRhine"
464 depends on EXPERIMENTAL
467 select SIBYTE_BCM1120
469 select SYS_HAS_CPU_SB1
470 select SYS_SUPPORTS_BIG_ENDIAN
471 select SYS_SUPPORTS_LITTLE_ENDIAN
474 bool "Sibyte BCM91120x-Carmel"
475 depends on EXPERIMENTAL
478 select SIBYTE_BCM1120
480 select SYS_HAS_CPU_SB1
481 select SYS_SUPPORTS_BIG_ENDIAN
482 select SYS_SUPPORTS_LITTLE_ENDIAN
485 bool "Sibyte BCM91125C-CRhone"
486 depends on EXPERIMENTAL
489 select SIBYTE_BCM1125
491 select SYS_HAS_CPU_SB1
492 select SYS_SUPPORTS_BIG_ENDIAN
493 select SYS_SUPPORTS_HIGHMEM
494 select SYS_SUPPORTS_LITTLE_ENDIAN
497 bool "Sibyte BCM91125E-Rhone"
498 depends on EXPERIMENTAL
501 select SIBYTE_BCM1125H
503 select SYS_HAS_CPU_SB1
504 select SYS_SUPPORTS_BIG_ENDIAN
505 select SYS_SUPPORTS_LITTLE_ENDIAN
508 bool "Sibyte BCM91250A-SWARM"
511 select NR_CPUS_DEFAULT_2
514 select SYS_HAS_CPU_SB1
515 select SYS_SUPPORTS_BIG_ENDIAN
516 select SYS_SUPPORTS_HIGHMEM
517 select SYS_SUPPORTS_KGDB
518 select SYS_SUPPORTS_LITTLE_ENDIAN
519 select ZONE_DMA32 if 64BIT
521 config SIBYTE_LITTLESUR
522 bool "Sibyte BCM91250C2-LittleSur"
523 depends on EXPERIMENTAL
526 select NR_CPUS_DEFAULT_2
529 select SYS_HAS_CPU_SB1
530 select SYS_SUPPORTS_BIG_ENDIAN
531 select SYS_SUPPORTS_HIGHMEM
532 select SYS_SUPPORTS_LITTLE_ENDIAN
534 config SIBYTE_SENTOSA
535 bool "Sibyte BCM91250E-Sentosa"
536 depends on EXPERIMENTAL
539 select NR_CPUS_DEFAULT_2
542 select SYS_HAS_CPU_SB1
543 select SYS_SUPPORTS_BIG_ENDIAN
544 select SYS_SUPPORTS_LITTLE_ENDIAN
546 config SIBYTE_PTSWARM
547 bool "Sibyte BCM91250PT-PTSWARM"
548 depends on EXPERIMENTAL
551 select NR_CPUS_DEFAULT_2
554 select SYS_HAS_CPU_SB1
555 select SYS_SUPPORTS_BIG_ENDIAN
556 select SYS_SUPPORTS_HIGHMEM
557 select SYS_SUPPORTS_LITTLE_ENDIAN
560 bool "Sibyte BCM91480B-BigSur"
563 select NR_CPUS_DEFAULT_4
564 select SIBYTE_BCM1x80
566 select SYS_HAS_CPU_SB1
567 select SYS_SUPPORTS_BIG_ENDIAN
568 select SYS_SUPPORTS_HIGHMEM
569 select SYS_SUPPORTS_LITTLE_ENDIAN
570 select ZONE_DMA32 if 64BIT
573 bool "SNI RM200/300/400"
574 select ARC if CPU_LITTLE_ENDIAN
575 select ARC32 if CPU_LITTLE_ENDIAN
576 select ARCH_MAY_HAVE_PC_FDC
580 select DMA_NONCOHERENT
581 select GENERIC_ISA_DMA
589 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
590 select SYS_HAS_CPU_R4X00
591 select SYS_HAS_CPU_R5000
592 select SYS_HAS_CPU_R10000
593 select R5000_CPU_SCACHE
594 select SYS_HAS_EARLY_PRINTK
595 select SYS_SUPPORTS_32BIT_KERNEL
596 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
597 select SYS_SUPPORTS_BIG_ENDIAN
598 select SYS_SUPPORTS_HIGHMEM
599 select SYS_SUPPORTS_LITTLE_ENDIAN
601 The SNI RM200/300/400 are MIPS-based machines manufactured by
602 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
603 Technology and now in turn merged with Fujitsu. Say Y here to
604 support this machine type.
606 config TOSHIBA_JMR3927
607 bool "Toshiba JMR-TX3927 board"
609 select DMA_NONCOHERENT
614 select SYS_HAS_CPU_TX39XX
615 select SYS_SUPPORTS_32BIT_KERNEL
616 select SYS_SUPPORTS_LITTLE_ENDIAN
617 select SYS_SUPPORTS_BIG_ENDIAN
618 select GENERIC_HARDIRQS_NO__DO_IRQ
620 config TOSHIBA_RBTX4927
621 bool "Toshiba RBTX49[23]7 board"
625 select DMA_NONCOHERENT
626 select HAS_TXX9_SERIAL
630 select I8259 if TOSHIBA_FPCIB0
632 select SYS_HAS_CPU_TX49XX
633 select SYS_SUPPORTS_32BIT_KERNEL
634 select SYS_SUPPORTS_64BIT_KERNEL
635 select SYS_SUPPORTS_LITTLE_ENDIAN
636 select SYS_SUPPORTS_BIG_ENDIAN
637 select SYS_SUPPORTS_KGDB
638 select GENERIC_HARDIRQS_NO__DO_IRQ
640 This Toshiba board is based on the TX4927 processor. Say Y here to
641 support this machine type
643 config TOSHIBA_RBTX4938
644 bool "Toshiba RBTX4938 board"
648 select DMA_NONCOHERENT
649 select HAS_TXX9_SERIAL
654 select SYS_HAS_CPU_TX49XX
655 select SYS_SUPPORTS_32BIT_KERNEL
656 select SYS_SUPPORTS_LITTLE_ENDIAN
657 select SYS_SUPPORTS_BIG_ENDIAN
658 select SYS_SUPPORTS_KGDB
659 select GENERIC_HARDIRQS_NO__DO_IRQ
662 This Toshiba board is based on the TX4938 processor. Say Y here to
663 support this machine type
666 bool "Wind River PPMC board"
671 select DMA_NONCOHERENT
673 select PCI_GT64XXX_PCI0
675 select SYS_HAS_CPU_MIPS32_R1
676 select SYS_HAS_CPU_MIPS32_R2
677 select SYS_HAS_CPU_MIPS64_R1
678 select SYS_HAS_CPU_NEVADA
679 select SYS_HAS_CPU_RM7000
680 select SYS_SUPPORTS_32BIT_KERNEL
681 select SYS_SUPPORTS_64BIT_KERNEL
682 select SYS_SUPPORTS_BIG_ENDIAN
683 select SYS_SUPPORTS_LITTLE_ENDIAN
685 This enables support for the Wind River MIPS32 4KC PPMC evaluation
686 board, which is based on GT64120 bridge chip.
690 source "arch/mips/au1000/Kconfig"
691 source "arch/mips/jazz/Kconfig"
692 source "arch/mips/lasat/Kconfig"
693 source "arch/mips/pmc-sierra/Kconfig"
694 source "arch/mips/sgi-ip27/Kconfig"
695 source "arch/mips/sibyte/Kconfig"
696 source "arch/mips/tx4927/Kconfig"
697 source "arch/mips/tx4938/Kconfig"
698 source "arch/mips/vr41xx/Kconfig"
702 config RWSEM_GENERIC_SPINLOCK
706 config RWSEM_XCHGADD_ALGORITHM
709 config ARCH_HAS_ILOG2_U32
713 config ARCH_HAS_ILOG2_U64
717 config GENERIC_FIND_NEXT_BIT
721 config GENERIC_HWEIGHT
725 config GENERIC_CALIBRATE_DELAY
729 config GENERIC_CLOCKEVENTS
737 config GENERIC_CMOS_UPDATE
741 config SCHED_NO_NO_OMIT_FRAME_POINTER
745 config GENERIC_HARDIRQS_NO__DO_IRQ
750 # Select some configuration options automatically based on user selections.
755 config ARCH_MAY_HAVE_PC_FDC
796 select DMA_NEED_PCI_MAP_STATE
798 config DMA_NONCOHERENT
800 select DMA_NEED_PCI_MAP_STATE
802 config DMA_NEED_PCI_MAP_STATE
806 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
807 depends on SYS_HAS_EARLY_PRINTK
810 This option enables special console drivers which allow the kernel
811 to print messages very early in the bootup process.
813 This is useful for kernel debugging when your machine crashes very
814 early before the console code is initialized. For normal operation,
815 it is not recommended because it looks ugly on some machines and
816 doesn't cooperate with an X server. You should normally say N here,
817 unless you want to debug such a crash.
819 config SYS_HAS_EARLY_PRINTK
838 config MIPS_DISABLE_OBSOLETE_IDE
844 config GENERIC_ISA_DMA
846 select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
848 config GENERIC_ISA_DMA_SUPPORT_BROKEN
850 select GENERIC_ISA_DMA
856 # Endianess selection. Sufficiently obscure so many users don't know what to
857 # answer,so we try hard to limit the available choices. Also the use of a
858 # choice statement should be more obvious to the user.
861 prompt "Endianess selection"
863 Some MIPS machines can be configured for either little or big endian
864 byte order. These modes require different kernels and a different
865 Linux distribution. In general there is one preferred byteorder for a
866 particular system but some systems are just as commonly used in the
867 one or the other endianness.
869 config CPU_BIG_ENDIAN
871 depends on SYS_SUPPORTS_BIG_ENDIAN
873 config CPU_LITTLE_ENDIAN
875 depends on SYS_SUPPORTS_LITTLE_ENDIAN
880 config SYS_SUPPORTS_APM_EMULATION
883 config SYS_SUPPORTS_BIG_ENDIAN
886 config SYS_SUPPORTS_LITTLE_ENDIAN
910 config MIPS_BOARDS_GEN
913 config PCI_GT64XXX_PCI0
916 config NO_EXCEPT_FILL
921 select HAS_TXX9_SERIAL
933 select DMA_NONCOHERENT
935 select SYS_HAS_CPU_MIPS32_R1
936 select SYS_HAS_EARLY_PRINTK
937 select SYS_SUPPORTS_32BIT_KERNEL
938 select GENERIC_HARDIRQS_NO__DO_IRQ
939 select SYS_SUPPORTS_KGDB
959 config MIPS_L1_CACHE_SHIFT
961 default "4" if MACH_DECSTATION
962 default "7" if SGI_IP27 || SNI_RM
963 default "4" if PMC_MSP4200_EVAL
966 config HAVE_STD_PC_SERIAL_PORT
970 bool "ARC console support"
971 depends on SGI_IP22 || (SNI_RM && CPU_LITTLE_ENDIAN)
975 depends on MACH_JAZZ || SNI_RM || SGI_IP32
980 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP32
991 source "kernel/time/Kconfig"
999 depends on SYS_HAS_CPU_LOONGSON2
1000 select CPU_SUPPORTS_32BIT_KERNEL
1001 select CPU_SUPPORTS_64BIT_KERNEL
1002 select CPU_SUPPORTS_HIGHMEM
1004 The Loongson 2E processor implements the MIPS III instruction set
1005 with many extensions.
1007 config CPU_MIPS32_R1
1008 bool "MIPS32 Release 1"
1009 depends on SYS_HAS_CPU_MIPS32_R1
1011 select CPU_HAS_PREFETCH
1012 select CPU_SUPPORTS_32BIT_KERNEL
1013 select CPU_SUPPORTS_HIGHMEM
1015 Choose this option to build a kernel for release 1 or later of the
1016 MIPS32 architecture. Most modern embedded systems with a 32-bit
1017 MIPS processor are based on a MIPS32 processor. If you know the
1018 specific type of processor in your system, choose those that one
1019 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1020 Release 2 of the MIPS32 architecture is available since several
1021 years so chances are you even have a MIPS32 Release 2 processor
1022 in which case you should choose CPU_MIPS32_R2 instead for better
1025 config CPU_MIPS32_R2
1026 bool "MIPS32 Release 2"
1027 depends on SYS_HAS_CPU_MIPS32_R2
1029 select CPU_HAS_PREFETCH
1030 select CPU_SUPPORTS_32BIT_KERNEL
1031 select CPU_SUPPORTS_HIGHMEM
1033 Choose this option to build a kernel for release 2 or later of the
1034 MIPS32 architecture. Most modern embedded systems with a 32-bit
1035 MIPS processor are based on a MIPS32 processor. If you know the
1036 specific type of processor in your system, choose those that one
1037 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1039 config CPU_MIPS64_R1
1040 bool "MIPS64 Release 1"
1041 depends on SYS_HAS_CPU_MIPS64_R1
1043 select CPU_HAS_PREFETCH
1044 select CPU_SUPPORTS_32BIT_KERNEL
1045 select CPU_SUPPORTS_64BIT_KERNEL
1046 select CPU_SUPPORTS_HIGHMEM
1048 Choose this option to build a kernel for release 1 or later of the
1049 MIPS64 architecture. Many modern embedded systems with a 64-bit
1050 MIPS processor are based on a MIPS64 processor. If you know the
1051 specific type of processor in your system, choose those that one
1052 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1053 Release 2 of the MIPS64 architecture is available since several
1054 years so chances are you even have a MIPS64 Release 2 processor
1055 in which case you should choose CPU_MIPS64_R2 instead for better
1058 config CPU_MIPS64_R2
1059 bool "MIPS64 Release 2"
1060 depends on SYS_HAS_CPU_MIPS64_R2
1062 select CPU_HAS_PREFETCH
1063 select CPU_SUPPORTS_32BIT_KERNEL
1064 select CPU_SUPPORTS_64BIT_KERNEL
1065 select CPU_SUPPORTS_HIGHMEM
1067 Choose this option to build a kernel for release 2 or later of the
1068 MIPS64 architecture. Many modern embedded systems with a 64-bit
1069 MIPS processor are based on a MIPS64 processor. If you know the
1070 specific type of processor in your system, choose those that one
1071 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1075 depends on SYS_HAS_CPU_R3000
1077 select CPU_SUPPORTS_32BIT_KERNEL
1078 select CPU_SUPPORTS_HIGHMEM
1080 Please make sure to pick the right CPU type. Linux/MIPS is not
1081 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
1082 *not* work on R4000 machines and vice versa. However, since most
1083 of the supported machines have an R4000 (or similar) CPU, R4x00
1084 might be a safe bet. If the resulting kernel does not work,
1085 try to recompile with R3000.
1089 depends on SYS_HAS_CPU_TX39XX
1090 select CPU_SUPPORTS_32BIT_KERNEL
1094 depends on SYS_HAS_CPU_VR41XX
1095 select CPU_SUPPORTS_32BIT_KERNEL
1096 select CPU_SUPPORTS_64BIT_KERNEL
1098 The options selects support for the NEC VR4100 series of processors.
1099 Only choose this option if you have one of these processors as a
1100 kernel built with this option will not run on any other type of
1101 processor or vice versa.
1105 depends on SYS_HAS_CPU_R4300
1107 select CPU_SUPPORTS_32BIT_KERNEL
1108 select CPU_SUPPORTS_64BIT_KERNEL
1110 MIPS Technologies R4300-series processors.
1114 depends on SYS_HAS_CPU_R4X00
1116 select CPU_SUPPORTS_32BIT_KERNEL
1117 select CPU_SUPPORTS_64BIT_KERNEL
1119 MIPS Technologies R4000-series processors other than 4300, including
1120 the R4000, R4400, R4600, and 4700.
1124 depends on SYS_HAS_CPU_TX49XX
1126 select CPU_HAS_PREFETCH
1127 select CPU_SUPPORTS_32BIT_KERNEL
1128 select CPU_SUPPORTS_64BIT_KERNEL
1132 depends on SYS_HAS_CPU_R5000
1134 select CPU_SUPPORTS_32BIT_KERNEL
1135 select CPU_SUPPORTS_64BIT_KERNEL
1137 MIPS Technologies R5000-series processors other than the Nevada.
1141 depends on SYS_HAS_CPU_R5432
1143 select CPU_SUPPORTS_32BIT_KERNEL
1144 select CPU_SUPPORTS_64BIT_KERNEL
1148 depends on EXPERIMENTAL
1150 depends on SYS_HAS_CPU_R6000
1151 select CPU_SUPPORTS_32BIT_KERNEL
1153 MIPS Technologies R6000 and R6000A series processors. Note these
1154 processors are extremely rare and the support for them is incomplete.
1158 depends on SYS_HAS_CPU_NEVADA
1160 select CPU_SUPPORTS_32BIT_KERNEL
1161 select CPU_SUPPORTS_64BIT_KERNEL
1163 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1167 depends on EXPERIMENTAL
1168 depends on SYS_HAS_CPU_R8000
1170 select CPU_HAS_PREFETCH
1171 select CPU_SUPPORTS_64BIT_KERNEL
1173 MIPS Technologies R8000 processors. Note these processors are
1174 uncommon and the support for them is incomplete.
1178 depends on SYS_HAS_CPU_R10000
1180 select CPU_HAS_PREFETCH
1181 select CPU_SUPPORTS_32BIT_KERNEL
1182 select CPU_SUPPORTS_64BIT_KERNEL
1183 select CPU_SUPPORTS_HIGHMEM
1185 MIPS Technologies R10000-series processors.
1189 depends on SYS_HAS_CPU_RM7000
1191 select CPU_HAS_PREFETCH
1192 select CPU_SUPPORTS_32BIT_KERNEL
1193 select CPU_SUPPORTS_64BIT_KERNEL
1194 select CPU_SUPPORTS_HIGHMEM
1198 depends on SYS_HAS_CPU_RM9000
1200 select CPU_HAS_PREFETCH
1201 select CPU_SUPPORTS_32BIT_KERNEL
1202 select CPU_SUPPORTS_64BIT_KERNEL
1203 select CPU_SUPPORTS_HIGHMEM
1204 select WEAK_ORDERING
1208 depends on SYS_HAS_CPU_SB1
1210 select CPU_SUPPORTS_32BIT_KERNEL
1211 select CPU_SUPPORTS_64BIT_KERNEL
1212 select CPU_SUPPORTS_HIGHMEM
1213 select WEAK_ORDERING
1217 config SYS_HAS_CPU_LOONGSON2
1220 config SYS_HAS_CPU_MIPS32_R1
1223 config SYS_HAS_CPU_MIPS32_R2
1226 config SYS_HAS_CPU_MIPS64_R1
1229 config SYS_HAS_CPU_MIPS64_R2
1232 config SYS_HAS_CPU_R3000
1235 config SYS_HAS_CPU_TX39XX
1238 config SYS_HAS_CPU_VR41XX
1241 config SYS_HAS_CPU_R4300
1244 config SYS_HAS_CPU_R4X00
1247 config SYS_HAS_CPU_TX49XX
1250 config SYS_HAS_CPU_R5000
1253 config SYS_HAS_CPU_R5432
1256 config SYS_HAS_CPU_R6000
1259 config SYS_HAS_CPU_NEVADA
1262 config SYS_HAS_CPU_R8000
1265 config SYS_HAS_CPU_R10000
1268 config SYS_HAS_CPU_RM7000
1271 config SYS_HAS_CPU_RM9000
1274 config SYS_HAS_CPU_SB1
1278 # CPU may reorder R->R, R->W, W->R, W->W
1279 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1281 config WEAK_ORDERING
1285 # CPU may reorder reads and writes beyond LL/SC
1286 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1288 config WEAK_REORDERING_BEYOND_LLSC
1293 # These two indicate any level of the MIPS32 and MIPS64 architecture
1297 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1301 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1304 # These two indicate the revision of the architecture, either Release 1 or Release 2
1308 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1312 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2
1314 config SYS_SUPPORTS_32BIT_KERNEL
1316 config SYS_SUPPORTS_64BIT_KERNEL
1318 config CPU_SUPPORTS_32BIT_KERNEL
1320 config CPU_SUPPORTS_64BIT_KERNEL
1327 prompt "Kernel code model"
1329 You should only select this option if you have a workload that
1330 actually benefits from 64-bit processing or if your machine has
1331 large memory. You will only be presented a single option in this
1332 menu if your system does not support both 32-bit and 64-bit kernels.
1335 bool "32-bit kernel"
1336 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1339 Select this option if you want to build a 32-bit kernel.
1341 bool "64-bit kernel"
1342 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1344 Select this option if you want to build a 64-bit kernel.
1349 prompt "Kernel page size"
1350 default PAGE_SIZE_4KB
1352 config PAGE_SIZE_4KB
1355 This option select the standard 4kB Linux page size. On some
1356 R3000-family processors this is the only available page size. Using
1357 4kB page size will minimize memory consumption and is therefore
1358 recommended for low memory systems.
1360 config PAGE_SIZE_8KB
1362 depends on EXPERIMENTAL && CPU_R8000
1364 Using 8kB page size will result in higher performance kernel at
1365 the price of higher memory consumption. This option is available
1366 only on the R8000 processor. Not that at the time of this writing
1367 this option is still high experimental; there are also issues with
1368 compatibility of user applications.
1370 config PAGE_SIZE_16KB
1372 depends on !CPU_R3000 && !CPU_TX39XX
1374 Using 16kB page size will result in higher performance kernel at
1375 the price of higher memory consumption. This option is available on
1376 all non-R3000 family processors. Note that you will need a suitable
1377 Linux distribution to support this.
1379 config PAGE_SIZE_64KB
1381 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1383 Using 64kB page size will result in higher performance kernel at
1384 the price of higher memory consumption. This option is available on
1385 all non-R3000 family processor. Not that at the time of this
1386 writing this option is still high experimental.
1393 config IP22_CPU_SCACHE
1398 # Support for a MIPS32 / MIPS64 style S-caches
1400 config MIPS_CPU_SCACHE
1404 config R5000_CPU_SCACHE
1408 config RM7000_CPU_SCACHE
1412 config SIBYTE_DMA_PAGEOPS
1413 bool "Use DMA to clear/copy pages"
1416 Instead of using the CPU to zero and copy pages, use a Data Mover
1417 channel. These DMA channels are otherwise unused by the standard
1418 SiByte Linux port. Seems to give a small performance benefit.
1420 config CPU_HAS_PREFETCH
1424 prompt "MIPS MT options"
1426 config MIPS_MT_DISABLED
1427 bool "Disable multithreading support."
1429 Use this option if your workload can't take advantage of
1430 MIPS hardware multithreading support. On systems that don't have
1431 the option of an MT-enabled processor this option will be the only
1432 option in this menu.
1435 bool "Use 1 TC on each available VPE for SMP"
1436 depends on SYS_SUPPORTS_MULTITHREADING
1437 select CPU_MIPSR2_IRQ_VI
1438 select CPU_MIPSR2_IRQ_EI
1440 select NR_CPUS_DEFAULT_2
1442 select SYS_SUPPORTS_SMP
1444 This is a kernel model which is also known a VSMP or lately
1445 has been marketesed into SMVP.
1448 bool "SMTC: Use all TCs on all VPEs for SMP"
1449 depends on CPU_MIPS32_R2
1450 #depends on CPU_MIPS64_R2 # once there is hardware ...
1451 depends on SYS_SUPPORTS_MULTITHREADING
1452 select GENERIC_CLOCKEVENTS_BROADCAST
1453 select CPU_MIPSR2_IRQ_VI
1454 select CPU_MIPSR2_IRQ_EI
1456 select NR_CPUS_DEFAULT_8
1458 select SYS_SUPPORTS_SMP
1460 This is a kernel model which is known a SMTC or lately has been
1461 marketesed into SMVP.
1468 config SYS_SUPPORTS_MULTITHREADING
1471 config MIPS_MT_FPAFF
1472 bool "Dynamic FPU affinity for FP-intensive threads"
1474 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1476 config MIPS_VPE_LOADER
1477 bool "VPE loader support."
1478 depends on SYS_SUPPORTS_MULTITHREADING
1479 select CPU_MIPSR2_IRQ_VI
1480 select CPU_MIPSR2_IRQ_EI
1483 Includes a loader for loading an elf relocatable object
1484 onto another VPE and running it.
1486 config MIPS_MT_SMTC_INSTANT_REPLAY
1487 bool "Low-latency Dispatch of Deferred SMTC IPIs"
1488 depends on MIPS_MT_SMTC && !PREEMPT
1491 SMTC pseudo-interrupts between TCs are deferred and queued
1492 if the target TC is interrupt-inhibited (IXMT). In the first
1493 SMTC prototypes, these queued IPIs were serviced on return
1494 to user mode, or on entry into the kernel idle loop. The
1495 INSTANT_REPLAY option dispatches them as part of local_irq_restore()
1496 processing, which adds runtime overhead (hence the option to turn
1497 it off), but ensures that IPIs are handled promptly even under
1498 heavy I/O interrupt load.
1500 config MIPS_MT_SMTC_IM_BACKSTOP
1501 bool "Use per-TC register bits as backstop for inhibited IM bits"
1502 depends on MIPS_MT_SMTC
1505 To support multiple TC microthreads acting as "CPUs" within
1506 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1507 during interrupt handling. To support legacy drivers and interrupt
1508 controller management code, SMTC has a "backstop" to track and
1509 if necessary restore the interrupt mask. This has some performance
1510 impact on interrupt service overhead. Disable it only if you know
1513 config MIPS_MT_SMTC_IRQAFF
1514 bool "Support IRQ affinity API"
1515 depends on MIPS_MT_SMTC
1518 Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.)
1519 for SMTC Linux kernel. Requires platform support, of which
1520 an example can be found in the MIPS kernel i8259 and Malta
1521 platform code. It is recommended that MIPS_MT_SMTC_INSTANT_REPLAY
1522 be enabled if MIPS_MT_SMTC_IRQAFF is used. Adds overhead to
1523 interrupt dispatch, and should be used only if you know what
1526 config MIPS_VPE_LOADER_TOM
1527 bool "Load VPE program into memory hidden from linux"
1528 depends on MIPS_VPE_LOADER
1531 The loader can use memory that is present but has been hidden from
1532 Linux using the kernel command line option "mem=xxMB". It's up to
1533 you to ensure the amount you put in the option and the space your
1534 program requires is less or equal to the amount physically present.
1536 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1537 config MIPS_VPE_APSP_API
1538 bool "Enable support for AP/SP API (RTLX)"
1539 depends on MIPS_VPE_LOADER
1542 config MIPS_APSP_KSPD
1544 depends on MIPS_VPE_APSP_API
1547 KSPD is a kernel daemon that accepts syscall requests from the SP
1548 side, actions them and returns the results. It also handles the
1549 "exit" syscall notifying other kernel modules the SP program is
1550 exiting. You probably want to say yes here.
1552 config SB1_PASS_1_WORKAROUNDS
1554 depends on CPU_SB1_PASS_1
1557 config SB1_PASS_2_WORKAROUNDS
1559 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1562 config SB1_PASS_2_1_WORKAROUNDS
1564 depends on CPU_SB1 && CPU_SB1_PASS_2
1567 config 64BIT_PHYS_ADDR
1573 config CPU_HAS_SMARTMIPS
1574 depends on SYS_SUPPORTS_SMARTMIPS
1575 bool "Support for the SmartMIPS ASE"
1577 SmartMIPS is a extension of the MIPS32 architecture aimed at
1578 increased security at both hardware and software level for
1579 smartcards. Enabling this option will allow proper use of the
1580 SmartMIPS instructions by Linux applications. However a kernel with
1581 this option will not work on a MIPS core without SmartMIPS core. If
1582 you don't know you probably don't have SmartMIPS and should say N
1588 config 64BIT_CONTEXT
1589 bool "Save 64bit integer registers"
1590 depends on 32BIT && CPU_LOONGSON2
1592 Loongson2 CPU is 64bit , when used in 32BIT mode, its integer
1593 registers can still be accessed as 64bit, mainly for multimedia
1594 instructions. We must have all 64bit save/restored to make sure
1595 those instructions to get correct result.
1598 # Vectored interrupt mode is an R2 feature
1600 config CPU_MIPSR2_IRQ_VI
1604 # Extended interrupt mode is an R2 feature
1606 config CPU_MIPSR2_IRQ_EI
1611 depends on !CPU_R3000
1614 config GENERIC_CLOCKEVENTS_BROADCAST
1618 # Use the generic interrupt handling code in kernel/irq/:
1620 config GENERIC_HARDIRQS
1624 config GENERIC_IRQ_PROBE
1632 # - Highmem only makes sense for the 32-bit kernel.
1633 # - The current highmem code will only work properly on physically indexed
1634 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1635 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1636 # moment we protect the user and offer the highmem option only on machines
1637 # where it's known to be safe. This will not offer highmem on a few systems
1638 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1639 # indexed CPUs but we're playing safe.
1640 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1641 # know they might have memory configurations that could make use of highmem
1645 bool "High Memory Support"
1646 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1648 config CPU_SUPPORTS_HIGHMEM
1651 config SYS_SUPPORTS_HIGHMEM
1654 config SYS_SUPPORTS_SMARTMIPS
1657 config ARCH_FLATMEM_ENABLE
1661 config ARCH_DISCONTIGMEM_ENABLE
1663 default y if SGI_IP27
1665 Say Y to support efficient handling of discontiguous physical memory,
1666 for architectures which are either NUMA (Non-Uniform Memory Access)
1667 or have huge holes in the physical address space for other reasons.
1668 See <file:Documentation/vm/numa> for more.
1670 config ARCH_POPULATES_NODE_MAP
1673 config ARCH_SPARSEMEM_ENABLE
1675 select SPARSEMEM_STATIC
1679 depends on SYS_SUPPORTS_NUMA
1681 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1682 Access). This option improves performance on systems with more
1683 than two nodes; on two node systems it is generally better to
1684 leave it disabled; on single node systems disable this option
1687 config SYS_SUPPORTS_NUMA
1693 depends on NEED_MULTIPLE_NODES
1698 bool "Multi-Processing support"
1699 depends on SYS_SUPPORTS_SMP
1702 This enables support for systems with more than one CPU. If you have
1703 a system with only one CPU, like most personal computers, say N. If
1704 you have a system with more than one CPU, say Y.
1706 If you say N here, the kernel will run on single and multiprocessor
1707 machines, but will use only one CPU of a multiprocessor machine. If
1708 you say Y here, the kernel will run on many, but not all,
1709 singleprocessor machines. On a singleprocessor machine, the kernel
1710 will run faster if you say N here.
1712 People using multiprocessor machines who say Y here should also say
1713 Y to "Enhanced Real Time Clock Support", below.
1715 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
1716 available at <http://www.tldp.org/docs.html#howto>.
1718 If you don't know what to do here, say N.
1720 config SYS_SUPPORTS_SMP
1723 config NR_CPUS_DEFAULT_1
1726 config NR_CPUS_DEFAULT_2
1729 config NR_CPUS_DEFAULT_4
1732 config NR_CPUS_DEFAULT_8
1735 config NR_CPUS_DEFAULT_16
1738 config NR_CPUS_DEFAULT_32
1741 config NR_CPUS_DEFAULT_64
1745 int "Maximum number of CPUs (2-64)"
1746 range 1 64 if NR_CPUS_DEFAULT_1
1748 default "1" if NR_CPUS_DEFAULT_1
1749 default "2" if NR_CPUS_DEFAULT_2
1750 default "4" if NR_CPUS_DEFAULT_4
1751 default "8" if NR_CPUS_DEFAULT_8
1752 default "16" if NR_CPUS_DEFAULT_16
1753 default "32" if NR_CPUS_DEFAULT_32
1754 default "64" if NR_CPUS_DEFAULT_64
1756 This allows you to specify the maximum number of CPUs which this
1757 kernel will support. The maximum supported value is 32 for 32-bit
1758 kernel and 64 for 64-bit kernels; the minimum value which makes
1759 sense is 1 for Qemu (useful only for kernel debugging purposes)
1760 and 2 for all others.
1762 This is purely to save memory - each supported CPU adds
1763 approximately eight kilobytes to the kernel image. For best
1764 performance should round up your number of processors to the next
1768 # Timer Interrupt Frequency Configuration
1772 prompt "Timer frequency"
1775 Allows the configuration of the timer frequency.
1778 bool "48 HZ" if SYS_SUPPORTS_48HZ
1781 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1784 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1787 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1790 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1793 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1796 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1800 config SYS_SUPPORTS_48HZ
1803 config SYS_SUPPORTS_100HZ
1806 config SYS_SUPPORTS_128HZ
1809 config SYS_SUPPORTS_250HZ
1812 config SYS_SUPPORTS_256HZ
1815 config SYS_SUPPORTS_1000HZ
1818 config SYS_SUPPORTS_1024HZ
1821 config SYS_SUPPORTS_ARBIT_HZ
1823 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1824 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1825 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1826 !SYS_SUPPORTS_1024HZ
1831 default 100 if HZ_100
1832 default 128 if HZ_128
1833 default 250 if HZ_250
1834 default 256 if HZ_256
1835 default 1000 if HZ_1000
1836 default 1024 if HZ_1024
1838 source "kernel/Kconfig.preempt"
1840 config MIPS_INSANE_LARGE
1841 bool "Support for large 64-bit configurations"
1842 depends on CPU_R10000 && 64BIT
1844 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1845 previous 64-bit processors which only supported 40 bit / 1TB. If you
1846 need processes of more than 1TB virtual address space, say Y here.
1847 This will result in additional memory usage, so it is not
1848 recommended for normal users.
1851 bool "Kexec system call (EXPERIMENTAL)"
1852 depends on EXPERIMENTAL
1854 kexec is a system call that implements the ability to shutdown your
1855 current kernel, and to start another kernel. It is like a reboot
1856 but it is independent of the system firmware. And like a reboot
1857 you can start any kernel with it, not just Linux.
1859 The name comes from the similarity to the exec system call.
1861 It is an ongoing process to be certain the hardware in a machine
1862 is properly shutdown, so do not be surprised if this code does not
1863 initially work for you. It may help to enable device hotplugging
1864 support. As of this writing the exact hardware interface is
1865 strongly in flux, so no good recommendation can be made.
1868 bool "Enable seccomp to safely compute untrusted bytecode"
1872 This kernel feature is useful for number crunching applications
1873 that may need to compute untrusted bytecode during their
1874 execution. By using pipes or other transports made available to
1875 the process as file descriptors supporting the read/write
1876 syscalls, it's possible to isolate those applications in
1877 their own address space using seccomp. Once seccomp is
1878 enabled via /proc/<pid>/seccomp, it cannot be disabled
1879 and the task is only allowed to execute a few safe syscalls
1880 defined by each seccomp mode.
1882 If unsure, say Y. Only embedded should say N here.
1886 config RWSEM_GENERIC_SPINLOCK
1890 config LOCKDEP_SUPPORT
1894 config STACKTRACE_SUPPORT
1898 source "init/Kconfig"
1900 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1908 bool "Support for PCI controller"
1909 depends on HW_HAS_PCI
1912 Find out whether you have a PCI motherboard. PCI is the name of a
1913 bus system, i.e. the way the CPU talks to the other stuff inside
1914 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
1917 The PCI-HOWTO, available from
1918 <http://www.tldp.org/docs.html#howto>, contains valuable
1919 information about which PCI hardware does work under Linux and which
1925 source "drivers/pci/Kconfig"
1928 # ISA support is now enabled via select. Too many systems still have the one
1929 # or other ISA chip on the board that users don't know about so don't expect
1930 # users to choose the right thing ...
1937 depends on HW_HAS_EISA
1939 select GENERIC_ISA_DMA
1941 The Extended Industry Standard Architecture (EISA) bus was
1942 developed as an open alternative to the IBM MicroChannel bus.
1944 The EISA bus provided some of the features of the IBM MicroChannel
1945 bus while maintaining backward compatibility with cards made for
1946 the older ISA bus. The EISA bus saw limited use between 1988 and
1947 1995 when it was made obsolete by the PCI bus.
1949 Say Y here if you are building a kernel for an EISA-based machine.
1953 source "drivers/eisa/Kconfig"
1956 bool "TURBOchannel support"
1957 depends on MACH_DECSTATION
1959 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
1960 processors. Documentation on writing device drivers for TurboChannel
1962 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
1965 # bool "Access.Bus support"
1981 source "drivers/pcmcia/Kconfig"
1983 source "drivers/pci/hotplug/Kconfig"
1987 menu "Executable file formats"
1989 source "fs/Kconfig.binfmt"
1995 bool "Include IRIX binary compatibility"
1996 depends on CPU_BIG_ENDIAN && 32BIT && BROKEN
1998 config MIPS32_COMPAT
1999 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
2002 Select this option if you want Linux/MIPS 32-bit binary
2003 compatibility. Since all software available for Linux/MIPS is
2004 currently 32-bit you should say Y here.
2008 depends on MIPS32_COMPAT
2011 config SYSVIPC_COMPAT
2013 depends on COMPAT && SYSVIPC
2017 bool "Kernel support for o32 binaries"
2018 depends on MIPS32_COMPAT
2020 Select this option if you want to run o32 binaries. These are pure
2021 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
2022 existing binaries are in this format.
2027 bool "Kernel support for n32 binaries"
2028 depends on MIPS32_COMPAT
2030 Select this option if you want to run n32 binaries. These are
2031 64-bit binaries using 32-bit quantities for addressing and certain
2032 data that would normally be 64-bit. They are used in special
2039 default y if MIPS32_O32 || MIPS32_N32
2043 menu "Power management options"
2045 source "kernel/power/Kconfig"
2049 source "net/Kconfig"
2051 source "drivers/Kconfig"
2055 source "kernel/Kconfig.instrumentation"
2057 source "arch/mips/Kconfig.debug"
2059 source "security/Kconfig"
2061 source "crypto/Kconfig"
2063 source "lib/Kconfig"