5 # Horrible source of confusion. Die, die, die ...
9 mainmenu "Linux/MIPS Kernel Configuration"
11 menu "Machine selection"
21 bool "Alchemy processor based machines"
24 bool "Basler eXcite smart camera"
33 select SYS_HAS_CPU_RM9000
34 select SYS_SUPPORTS_32BIT_KERNEL
35 select SYS_SUPPORTS_BIG_ENDIAN
36 select SYS_SUPPORTS_KGDB
38 The eXcite is a smart camera platform manufactured by
39 Basler Vision Technologies AG.
42 bool "BCM47XX based boards"
45 select DMA_NONCOHERENT
48 select SYS_HAS_CPU_MIPS32_R1
49 select SYS_SUPPORTS_32BIT_KERNEL
50 select SYS_SUPPORTS_LITTLE_ENDIAN
52 select SSB_DRIVER_MIPS
53 select SSB_DRIVER_EXTIF
54 select SSB_PCICORE_HOSTMODE if PCI
56 select SYS_HAS_EARLY_PRINTK
59 Support for BCM47XX based boards
66 select DMA_NONCOHERENT
72 select PCI_GT64XXX_PCI0
73 select SYS_HAS_CPU_NEVADA
74 select SYS_HAS_EARLY_PRINTK
75 select SYS_SUPPORTS_32BIT_KERNEL
76 select SYS_SUPPORTS_64BIT_KERNEL
77 select SYS_SUPPORTS_LITTLE_ENDIAN
78 select GENERIC_HARDIRQS_NO__DO_IRQ
80 config MACH_DECSTATION
85 select CPU_DADDI_WORKAROUNDS if 64BIT
86 select CPU_R4000_WORKAROUNDS if 64BIT
87 select CPU_R4400_WORKAROUNDS if 64BIT
88 select DMA_NONCOHERENT
91 select SYS_HAS_CPU_R3000
92 select SYS_HAS_CPU_R4X00
93 select SYS_SUPPORTS_32BIT_KERNEL
94 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
95 select SYS_SUPPORTS_LITTLE_ENDIAN
96 select SYS_SUPPORTS_128HZ
97 select SYS_SUPPORTS_256HZ
98 select SYS_SUPPORTS_1024HZ
100 This enables support for DEC's MIPS based workstations. For details
101 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
102 DECstation porting pages on <http://decstation.unix-ag.org/>.
104 If you have one of the following DECstation Models you definitely
105 want to choose R4xx0 for the CPU Type:
112 otherwise choose R3000.
115 bool "Jazz family of machines"
118 select ARCH_MAY_HAVE_PC_FDC
121 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
122 select GENERIC_ISA_DMA
127 select SYS_HAS_CPU_R4X00
128 select SYS_SUPPORTS_32BIT_KERNEL
129 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
130 select SYS_SUPPORTS_100HZ
131 select GENERIC_HARDIRQS_NO__DO_IRQ
133 This a family of machines based on the MIPS R4030 chipset which was
134 used by several vendors to build RISC/os and Windows NT workstations.
135 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millenium and
136 Olivetti M700-10 workstations.
139 bool "LASAT Networks platforms"
142 select DMA_NONCOHERENT
143 select SYS_HAS_EARLY_PRINTK
146 select PCI_GT64XXX_PCI0
148 select R5000_CPU_SCACHE
149 select SYS_HAS_CPU_R5000
150 select SYS_SUPPORTS_32BIT_KERNEL
151 select SYS_SUPPORTS_64BIT_KERNEL if BROKEN
152 select SYS_SUPPORTS_LITTLE_ENDIAN
153 select GENERIC_HARDIRQS_NO__DO_IRQ
156 bool "Lemote Fulong mini-PC"
157 select ARCH_SPARSEMEM_ENABLE
160 select SYS_HAS_CPU_LOONGSON2
161 select DMA_NONCOHERENT
164 select HAVE_STD_PC_SERIAL_PORT
169 select SYS_SUPPORTS_32BIT_KERNEL
170 select SYS_SUPPORTS_64BIT_KERNEL
171 select SYS_SUPPORTS_LITTLE_ENDIAN
172 select SYS_SUPPORTS_HIGHMEM
173 select SYS_HAS_EARLY_PRINTK
174 select GENERIC_HARDIRQS_NO__DO_IRQ
175 select GENERIC_ISA_DMA_SUPPORT_BROKEN
178 Lemote Fulong mini-PC board based on the Chinese Loongson-2E CPU and
182 bool "MIPS Atlas board"
187 select DMA_NONCOHERENT
188 select SYS_HAS_EARLY_PRINTK
191 select MIPS_BOARDS_GEN
193 select PCI_GT64XXX_PCI0
195 select RM7000_CPU_SCACHE
197 select SYS_HAS_CPU_MIPS32_R1
198 select SYS_HAS_CPU_MIPS32_R2
199 select SYS_HAS_CPU_MIPS64_R1
200 select SYS_HAS_CPU_NEVADA
201 select SYS_HAS_CPU_RM7000
202 select SYS_SUPPORTS_32BIT_KERNEL
203 select SYS_SUPPORTS_64BIT_KERNEL
204 select SYS_SUPPORTS_BIG_ENDIAN
205 select SYS_SUPPORTS_LITTLE_ENDIAN
206 select SYS_SUPPORTS_MULTITHREADING if EXPERIMENTAL
207 select SYS_SUPPORTS_SMARTMIPS
208 select GENERIC_HARDIRQS_NO__DO_IRQ
210 This enables support for the MIPS Technologies Atlas evaluation
214 bool "MIPS Malta board"
215 select ARCH_MAY_HAVE_PC_FDC
220 select DMA_NONCOHERENT
221 select GENERIC_ISA_DMA
226 select MIPS_BOARDS_GEN
228 select MIPS_CPU_SCACHE
229 select PCI_GT64XXX_PCI0
232 select SYS_HAS_CPU_MIPS32_R1
233 select SYS_HAS_CPU_MIPS32_R2
234 select SYS_HAS_CPU_MIPS64_R1
235 select SYS_HAS_CPU_NEVADA
236 select SYS_HAS_CPU_RM7000
237 select SYS_HAS_EARLY_PRINTK
238 select SYS_SUPPORTS_32BIT_KERNEL
239 select SYS_SUPPORTS_64BIT_KERNEL
240 select SYS_SUPPORTS_BIG_ENDIAN
241 select SYS_SUPPORTS_LITTLE_ENDIAN
242 select SYS_SUPPORTS_MULTITHREADING
243 select SYS_SUPPORTS_SMARTMIPS
245 This enables support for the MIPS Technologies Malta evaluation
249 bool "MIPS SEAD board"
253 select DMA_NONCOHERENT
254 select SYS_HAS_EARLY_PRINTK
255 select MIPS_BOARDS_GEN
256 select SYS_HAS_CPU_MIPS32_R1
257 select SYS_HAS_CPU_MIPS32_R2
258 select SYS_HAS_CPU_MIPS64_R1
259 select SYS_SUPPORTS_32BIT_KERNEL
260 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
261 select SYS_SUPPORTS_BIG_ENDIAN
262 select SYS_SUPPORTS_LITTLE_ENDIAN
263 select SYS_SUPPORTS_SMARTMIPS
265 This enables support for the MIPS Technologies SEAD evaluation
269 bool 'MIPS simulator (MIPSsim)'
272 select DMA_NONCOHERENT
273 select SYS_HAS_EARLY_PRINTK
276 select SYS_HAS_CPU_MIPS32_R1
277 select SYS_HAS_CPU_MIPS32_R2
278 select SYS_HAS_EARLY_PRINTK
279 select SYS_SUPPORTS_32BIT_KERNEL
280 select SYS_SUPPORTS_BIG_ENDIAN
281 select SYS_SUPPORTS_MULTITHREADING
282 select SYS_SUPPORTS_LITTLE_ENDIAN
284 This option enables support for MIPS Technologies MIPSsim software
288 bool "NEC EMMA2RH Mark-eins"
291 select DMA_NONCOHERENT
295 select SYS_SUPPORTS_32BIT_KERNEL
296 select SYS_SUPPORTS_BIG_ENDIAN
297 select SYS_SUPPORTS_LITTLE_ENDIAN
298 select SYS_HAS_CPU_R5000
300 This enables support for the R5432-based NEC Mark-eins
301 boards with R5500 CPU.
304 bool "NEC VR4100 series based machines"
307 select SYS_HAS_CPU_VR41XX
308 select GENERIC_HARDIRQS_NO__DO_IRQ
311 bool "Philips PNX8550 based JBS board"
313 select SYS_SUPPORTS_LITTLE_ENDIAN
315 config PNX8550_STB810
316 bool "Philips PNX8550 based STB810 board"
318 select SYS_SUPPORTS_LITTLE_ENDIAN
321 bool "PMC-Sierra MSP chipsets"
322 depends on EXPERIMENTAL
323 select DMA_NONCOHERENT
325 select NO_EXCEPT_FILL
327 select SYS_HAS_CPU_MIPS32_R1
328 select SYS_HAS_CPU_MIPS32_R2
329 select SYS_SUPPORTS_32BIT_KERNEL
330 select SYS_SUPPORTS_BIG_ENDIAN
331 select SYS_SUPPORTS_KGDB
334 select SERIAL_8250_CONSOLE
336 This adds support for the PMC-Sierra family of Multi-Service
337 Processor System-On-A-Chips. These parts include a number
338 of integrated peripherals, interfaces and DSPs in addition to
339 a variety of MIPS cores.
342 bool "PMC-Sierra Yosemite eval board"
351 select SYS_HAS_CPU_RM9000
352 select SYS_HAS_EARLY_PRINTK
353 select SYS_SUPPORTS_32BIT_KERNEL
354 select SYS_SUPPORTS_64BIT_KERNEL
355 select SYS_SUPPORTS_BIG_ENDIAN
356 select SYS_SUPPORTS_HIGHMEM
357 select SYS_SUPPORTS_KGDB
358 select SYS_SUPPORTS_SMP
360 Yosemite is an evaluation board for the RM9000x2 processor
361 manufactured by PMC-Sierra.
364 bool "SGI IP22 (Indy/Indigo2)"
370 select DEFAULT_SGI_PARTITION
371 select DMA_NONCOHERENT
375 select IP22_CPU_SCACHE
377 select GENERIC_ISA_DMA_SUPPORT_BROKEN
378 select SGI_HAS_DS1286
380 select SGI_HAS_INDYDOG
385 select SYS_HAS_CPU_R4X00
386 select SYS_HAS_CPU_R5000
387 select SYS_HAS_EARLY_PRINTK
388 select SYS_SUPPORTS_32BIT_KERNEL
389 select SYS_SUPPORTS_64BIT_KERNEL
390 select SYS_SUPPORTS_BIG_ENDIAN
392 This are the SGI Indy, Challenge S and Indigo2, as well as certain
393 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
394 that runs on these, say Y here.
397 bool "SGI IP27 (Origin200/2000)"
401 select DEFAULT_SGI_PARTITION
403 select SYS_HAS_EARLY_PRINTK
405 select NR_CPUS_DEFAULT_64
406 select SYS_HAS_CPU_R10000
407 select SYS_SUPPORTS_64BIT_KERNEL
408 select SYS_SUPPORTS_BIG_ENDIAN
409 select SYS_SUPPORTS_KGDB
410 select SYS_SUPPORTS_NUMA
411 select SYS_SUPPORTS_SMP
412 select GENERIC_HARDIRQS_NO__DO_IRQ
414 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
415 workstations. To compile a Linux kernel that runs on these, say Y
419 bool "SGI IP28 (Indigo2 R10k) (EXPERIMENTAL)"
420 depends on EXPERIMENTAL
426 select DEFAULT_SGI_PARTITION
427 select DMA_NONCOHERENT
428 select GENERIC_ISA_DMA_SUPPORT_BROKEN
433 select SGI_HAS_DS1286
435 select SGI_HAS_INDYDOG
440 select SYS_HAS_CPU_R10000
441 select SYS_HAS_EARLY_PRINTK
442 select SYS_SUPPORTS_64BIT_KERNEL
443 select SYS_SUPPORTS_BIG_ENDIAN
445 This is the SGI Indigo2 with R10000 processor. To compile a Linux
446 kernel that runs on these, say Y here.
455 select DMA_NONCOHERENT
458 select R5000_CPU_SCACHE
459 select RM7000_CPU_SCACHE
460 select SYS_HAS_CPU_R5000
461 select SYS_HAS_CPU_R10000 if BROKEN
462 select SYS_HAS_CPU_RM7000
463 select SYS_HAS_CPU_NEVADA
464 select SYS_SUPPORTS_64BIT_KERNEL
465 select SYS_SUPPORTS_BIG_ENDIAN
467 If you want this kernel to run on SGI O2 workstation, say Y here.
470 bool "Sibyte BCM91120C-CRhine"
471 depends on EXPERIMENTAL
474 select SIBYTE_BCM1120
476 select SYS_HAS_CPU_SB1
477 select SYS_SUPPORTS_BIG_ENDIAN
478 select SYS_SUPPORTS_LITTLE_ENDIAN
481 bool "Sibyte BCM91120x-Carmel"
482 depends on EXPERIMENTAL
485 select SIBYTE_BCM1120
487 select SYS_HAS_CPU_SB1
488 select SYS_SUPPORTS_BIG_ENDIAN
489 select SYS_SUPPORTS_LITTLE_ENDIAN
492 bool "Sibyte BCM91125C-CRhone"
493 depends on EXPERIMENTAL
496 select SIBYTE_BCM1125
498 select SYS_HAS_CPU_SB1
499 select SYS_SUPPORTS_BIG_ENDIAN
500 select SYS_SUPPORTS_HIGHMEM
501 select SYS_SUPPORTS_LITTLE_ENDIAN
504 bool "Sibyte BCM91125E-Rhone"
505 depends on EXPERIMENTAL
508 select SIBYTE_BCM1125H
510 select SYS_HAS_CPU_SB1
511 select SYS_SUPPORTS_BIG_ENDIAN
512 select SYS_SUPPORTS_LITTLE_ENDIAN
515 bool "Sibyte BCM91250A-SWARM"
518 select NR_CPUS_DEFAULT_2
521 select SYS_HAS_CPU_SB1
522 select SYS_SUPPORTS_BIG_ENDIAN
523 select SYS_SUPPORTS_HIGHMEM
524 select SYS_SUPPORTS_KGDB
525 select SYS_SUPPORTS_LITTLE_ENDIAN
526 select ZONE_DMA32 if 64BIT
528 config SIBYTE_LITTLESUR
529 bool "Sibyte BCM91250C2-LittleSur"
530 depends on EXPERIMENTAL
533 select NR_CPUS_DEFAULT_2
536 select SYS_HAS_CPU_SB1
537 select SYS_SUPPORTS_BIG_ENDIAN
538 select SYS_SUPPORTS_HIGHMEM
539 select SYS_SUPPORTS_LITTLE_ENDIAN
541 config SIBYTE_SENTOSA
542 bool "Sibyte BCM91250E-Sentosa"
543 depends on EXPERIMENTAL
546 select NR_CPUS_DEFAULT_2
549 select SYS_HAS_CPU_SB1
550 select SYS_SUPPORTS_BIG_ENDIAN
551 select SYS_SUPPORTS_LITTLE_ENDIAN
554 bool "Sibyte BCM91480B-BigSur"
557 select NR_CPUS_DEFAULT_4
558 select SIBYTE_BCM1x80
560 select SYS_HAS_CPU_SB1
561 select SYS_SUPPORTS_BIG_ENDIAN
562 select SYS_SUPPORTS_HIGHMEM
563 select SYS_SUPPORTS_LITTLE_ENDIAN
564 select ZONE_DMA32 if 64BIT
567 bool "SNI RM200/300/400"
568 select ARC if CPU_LITTLE_ENDIAN
569 select ARC32 if CPU_LITTLE_ENDIAN
570 select SNIPROM if CPU_BIG_ENDIAN
571 select ARCH_MAY_HAVE_PC_FDC
575 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
576 select DMA_NONCOHERENT
577 select GENERIC_ISA_DMA
584 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
585 select SYS_HAS_CPU_R4X00
586 select SYS_HAS_CPU_R5000
587 select SYS_HAS_CPU_R10000
588 select R5000_CPU_SCACHE
589 select SYS_HAS_EARLY_PRINTK
590 select SYS_SUPPORTS_32BIT_KERNEL
591 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
592 select SYS_SUPPORTS_BIG_ENDIAN
593 select SYS_SUPPORTS_HIGHMEM
594 select SYS_SUPPORTS_LITTLE_ENDIAN
596 The SNI RM200/300/400 are MIPS-based machines manufactured by
597 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
598 Technology and now in turn merged with Fujitsu. Say Y here to
599 support this machine type.
601 config TOSHIBA_JMR3927
602 bool "Toshiba JMR-TX3927 board"
604 select DMA_NONCOHERENT
609 select SYS_HAS_CPU_TX39XX
610 select SYS_SUPPORTS_32BIT_KERNEL
611 select SYS_SUPPORTS_LITTLE_ENDIAN
612 select SYS_SUPPORTS_BIG_ENDIAN
613 select GENERIC_HARDIRQS_NO__DO_IRQ
615 config TOSHIBA_RBTX4927
616 bool "Toshiba RBTX49[23]7 board"
620 select DMA_NONCOHERENT
621 select HAS_TXX9_SERIAL
625 select I8259 if TOSHIBA_FPCIB0
627 select SYS_HAS_CPU_TX49XX
628 select SYS_SUPPORTS_32BIT_KERNEL
629 select SYS_SUPPORTS_64BIT_KERNEL
630 select SYS_SUPPORTS_LITTLE_ENDIAN
631 select SYS_SUPPORTS_BIG_ENDIAN
632 select SYS_SUPPORTS_KGDB
633 select GENERIC_HARDIRQS_NO__DO_IRQ
635 This Toshiba board is based on the TX4927 processor. Say Y here to
636 support this machine type
638 config TOSHIBA_RBTX4938
639 bool "Toshiba RBTX4938 board"
643 select DMA_NONCOHERENT
644 select HAS_TXX9_SERIAL
649 select SYS_HAS_CPU_TX49XX
650 select SYS_SUPPORTS_32BIT_KERNEL
651 select SYS_SUPPORTS_LITTLE_ENDIAN
652 select SYS_SUPPORTS_BIG_ENDIAN
653 select SYS_SUPPORTS_KGDB
654 select GENERIC_HARDIRQS_NO__DO_IRQ
657 This Toshiba board is based on the TX4938 processor. Say Y here to
658 support this machine type
661 bool "Wind River PPMC board"
666 select DMA_NONCOHERENT
668 select PCI_GT64XXX_PCI0
670 select SYS_HAS_CPU_MIPS32_R1
671 select SYS_HAS_CPU_MIPS32_R2
672 select SYS_HAS_CPU_MIPS64_R1
673 select SYS_HAS_CPU_NEVADA
674 select SYS_HAS_CPU_RM7000
675 select SYS_SUPPORTS_32BIT_KERNEL
676 select SYS_SUPPORTS_64BIT_KERNEL
677 select SYS_SUPPORTS_BIG_ENDIAN
678 select SYS_SUPPORTS_LITTLE_ENDIAN
680 This enables support for the Wind River MIPS32 4KC PPMC evaluation
681 board, which is based on GT64120 bridge chip.
685 source "arch/mips/au1000/Kconfig"
686 source "arch/mips/basler/excite/Kconfig"
687 source "arch/mips/jazz/Kconfig"
688 source "arch/mips/lasat/Kconfig"
689 source "arch/mips/pmc-sierra/Kconfig"
690 source "arch/mips/sgi-ip27/Kconfig"
691 source "arch/mips/sibyte/Kconfig"
692 source "arch/mips/tx4927/Kconfig"
693 source "arch/mips/tx4938/Kconfig"
694 source "arch/mips/vr41xx/Kconfig"
698 config GENERIC_LOCKBREAK
701 depends on SMP && PREEMPT
703 config RWSEM_GENERIC_SPINLOCK
707 config RWSEM_XCHGADD_ALGORITHM
710 config ARCH_HAS_ILOG2_U32
714 config ARCH_HAS_ILOG2_U64
718 config ARCH_SUPPORTS_OPROFILE
720 default y if !MIPS_MT_SMTC
722 config GENERIC_FIND_NEXT_BIT
726 config GENERIC_HWEIGHT
730 config GENERIC_CALIBRATE_DELAY
734 config GENERIC_CLOCKEVENTS
742 config GENERIC_CMOS_UPDATE
746 config SCHED_NO_NO_OMIT_FRAME_POINTER
750 config GENERIC_HARDIRQS_NO__DO_IRQ
755 # Select some configuration options automatically based on user selections.
760 config ARCH_MAY_HAVE_PC_FDC
799 config DMA_NONCOHERENT
801 select DMA_NEED_PCI_MAP_STATE
803 config DMA_NEED_PCI_MAP_STATE
807 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
808 depends on SYS_HAS_EARLY_PRINTK
811 This option enables special console drivers which allow the kernel
812 to print messages very early in the bootup process.
814 This is useful for kernel debugging when your machine crashes very
815 early before the console code is initialized. For normal operation,
816 it is not recommended because it looks ugly on some machines and
817 doesn't cooperate with an X server. You should normally say N here,
818 unless you want to debug such a crash.
820 config SYS_HAS_EARLY_PRINTK
839 config MIPS_DISABLE_OBSOLETE_IDE
845 config GENERIC_ISA_DMA
847 select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
849 config GENERIC_ISA_DMA_SUPPORT_BROKEN
851 select GENERIC_ISA_DMA
857 # Endianess selection. Sufficiently obscure so many users don't know what to
858 # answer,so we try hard to limit the available choices. Also the use of a
859 # choice statement should be more obvious to the user.
862 prompt "Endianess selection"
864 Some MIPS machines can be configured for either little or big endian
865 byte order. These modes require different kernels and a different
866 Linux distribution. In general there is one preferred byteorder for a
867 particular system but some systems are just as commonly used in the
868 one or the other endianness.
870 config CPU_BIG_ENDIAN
872 depends on SYS_SUPPORTS_BIG_ENDIAN
874 config CPU_LITTLE_ENDIAN
876 depends on SYS_SUPPORTS_LITTLE_ENDIAN
881 config SYS_SUPPORTS_APM_EMULATION
884 config SYS_SUPPORTS_BIG_ENDIAN
887 config SYS_SUPPORTS_LITTLE_ENDIAN
911 config MIPS_BOARDS_GEN
914 config PCI_GT64XXX_PCI0
917 config NO_EXCEPT_FILL
922 select HAS_TXX9_SERIAL
934 select DMA_NONCOHERENT
936 select SYS_HAS_CPU_MIPS32_R1
937 select SYS_HAS_EARLY_PRINTK
938 select SYS_SUPPORTS_32BIT_KERNEL
939 select GENERIC_HARDIRQS_NO__DO_IRQ
940 select SYS_SUPPORTS_KGDB
954 config SGI_HAS_DS1286
957 config SGI_HAS_INDYDOG
972 config DEFAULT_SGI_PARTITION
984 config MIPS_L1_CACHE_SHIFT
986 default "4" if MACH_DECSTATION
987 default "7" if SGI_IP27 || SGI_IP28 || SNI_RM
988 default "4" if PMC_MSP4200_EVAL
991 config HAVE_STD_PC_SERIAL_PORT
995 bool "ARC console support"
996 depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
1000 depends on MACH_JAZZ || SNI_RM || SGI_IP32
1005 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP28 || SGI_IP32
1014 menu "CPU selection"
1020 config CPU_LOONGSON2
1022 depends on SYS_HAS_CPU_LOONGSON2
1023 select CPU_SUPPORTS_32BIT_KERNEL
1024 select CPU_SUPPORTS_64BIT_KERNEL
1025 select CPU_SUPPORTS_HIGHMEM
1027 The Loongson 2E processor implements the MIPS III instruction set
1028 with many extensions.
1030 config CPU_MIPS32_R1
1031 bool "MIPS32 Release 1"
1032 depends on SYS_HAS_CPU_MIPS32_R1
1034 select CPU_HAS_PREFETCH
1035 select CPU_SUPPORTS_32BIT_KERNEL
1036 select CPU_SUPPORTS_HIGHMEM
1038 Choose this option to build a kernel for release 1 or later of the
1039 MIPS32 architecture. Most modern embedded systems with a 32-bit
1040 MIPS processor are based on a MIPS32 processor. If you know the
1041 specific type of processor in your system, choose those that one
1042 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1043 Release 2 of the MIPS32 architecture is available since several
1044 years so chances are you even have a MIPS32 Release 2 processor
1045 in which case you should choose CPU_MIPS32_R2 instead for better
1048 config CPU_MIPS32_R2
1049 bool "MIPS32 Release 2"
1050 depends on SYS_HAS_CPU_MIPS32_R2
1052 select CPU_HAS_PREFETCH
1053 select CPU_SUPPORTS_32BIT_KERNEL
1054 select CPU_SUPPORTS_HIGHMEM
1056 Choose this option to build a kernel for release 2 or later of the
1057 MIPS32 architecture. Most modern embedded systems with a 32-bit
1058 MIPS processor are based on a MIPS32 processor. If you know the
1059 specific type of processor in your system, choose those that one
1060 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1062 config CPU_MIPS64_R1
1063 bool "MIPS64 Release 1"
1064 depends on SYS_HAS_CPU_MIPS64_R1
1066 select CPU_HAS_PREFETCH
1067 select CPU_SUPPORTS_32BIT_KERNEL
1068 select CPU_SUPPORTS_64BIT_KERNEL
1069 select CPU_SUPPORTS_HIGHMEM
1071 Choose this option to build a kernel for release 1 or later of the
1072 MIPS64 architecture. Many modern embedded systems with a 64-bit
1073 MIPS processor are based on a MIPS64 processor. If you know the
1074 specific type of processor in your system, choose those that one
1075 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1076 Release 2 of the MIPS64 architecture is available since several
1077 years so chances are you even have a MIPS64 Release 2 processor
1078 in which case you should choose CPU_MIPS64_R2 instead for better
1081 config CPU_MIPS64_R2
1082 bool "MIPS64 Release 2"
1083 depends on SYS_HAS_CPU_MIPS64_R2
1085 select CPU_HAS_PREFETCH
1086 select CPU_SUPPORTS_32BIT_KERNEL
1087 select CPU_SUPPORTS_64BIT_KERNEL
1088 select CPU_SUPPORTS_HIGHMEM
1090 Choose this option to build a kernel for release 2 or later of the
1091 MIPS64 architecture. Many modern embedded systems with a 64-bit
1092 MIPS processor are based on a MIPS64 processor. If you know the
1093 specific type of processor in your system, choose those that one
1094 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1098 depends on SYS_HAS_CPU_R3000
1100 select CPU_SUPPORTS_32BIT_KERNEL
1101 select CPU_SUPPORTS_HIGHMEM
1103 Please make sure to pick the right CPU type. Linux/MIPS is not
1104 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
1105 *not* work on R4000 machines and vice versa. However, since most
1106 of the supported machines have an R4000 (or similar) CPU, R4x00
1107 might be a safe bet. If the resulting kernel does not work,
1108 try to recompile with R3000.
1112 depends on SYS_HAS_CPU_TX39XX
1113 select CPU_SUPPORTS_32BIT_KERNEL
1117 depends on SYS_HAS_CPU_VR41XX
1118 select CPU_SUPPORTS_32BIT_KERNEL
1119 select CPU_SUPPORTS_64BIT_KERNEL
1121 The options selects support for the NEC VR4100 series of processors.
1122 Only choose this option if you have one of these processors as a
1123 kernel built with this option will not run on any other type of
1124 processor or vice versa.
1128 depends on SYS_HAS_CPU_R4300
1130 select CPU_SUPPORTS_32BIT_KERNEL
1131 select CPU_SUPPORTS_64BIT_KERNEL
1133 MIPS Technologies R4300-series processors.
1137 depends on SYS_HAS_CPU_R4X00
1139 select CPU_SUPPORTS_32BIT_KERNEL
1140 select CPU_SUPPORTS_64BIT_KERNEL
1142 MIPS Technologies R4000-series processors other than 4300, including
1143 the R4000, R4400, R4600, and 4700.
1147 depends on SYS_HAS_CPU_TX49XX
1149 select CPU_HAS_PREFETCH
1150 select CPU_SUPPORTS_32BIT_KERNEL
1151 select CPU_SUPPORTS_64BIT_KERNEL
1155 depends on SYS_HAS_CPU_R5000
1157 select CPU_SUPPORTS_32BIT_KERNEL
1158 select CPU_SUPPORTS_64BIT_KERNEL
1160 MIPS Technologies R5000-series processors other than the Nevada.
1164 depends on SYS_HAS_CPU_R5432
1166 select CPU_SUPPORTS_32BIT_KERNEL
1167 select CPU_SUPPORTS_64BIT_KERNEL
1171 depends on EXPERIMENTAL
1173 depends on SYS_HAS_CPU_R6000
1174 select CPU_SUPPORTS_32BIT_KERNEL
1176 MIPS Technologies R6000 and R6000A series processors. Note these
1177 processors are extremely rare and the support for them is incomplete.
1181 depends on SYS_HAS_CPU_NEVADA
1183 select CPU_SUPPORTS_32BIT_KERNEL
1184 select CPU_SUPPORTS_64BIT_KERNEL
1186 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1190 depends on EXPERIMENTAL
1191 depends on SYS_HAS_CPU_R8000
1193 select CPU_HAS_PREFETCH
1194 select CPU_SUPPORTS_64BIT_KERNEL
1196 MIPS Technologies R8000 processors. Note these processors are
1197 uncommon and the support for them is incomplete.
1201 depends on SYS_HAS_CPU_R10000
1203 select CPU_HAS_PREFETCH
1204 select CPU_SUPPORTS_32BIT_KERNEL
1205 select CPU_SUPPORTS_64BIT_KERNEL
1206 select CPU_SUPPORTS_HIGHMEM
1208 MIPS Technologies R10000-series processors.
1212 depends on SYS_HAS_CPU_RM7000
1214 select CPU_HAS_PREFETCH
1215 select CPU_SUPPORTS_32BIT_KERNEL
1216 select CPU_SUPPORTS_64BIT_KERNEL
1217 select CPU_SUPPORTS_HIGHMEM
1221 depends on SYS_HAS_CPU_RM9000
1223 select CPU_HAS_PREFETCH
1224 select CPU_SUPPORTS_32BIT_KERNEL
1225 select CPU_SUPPORTS_64BIT_KERNEL
1226 select CPU_SUPPORTS_HIGHMEM
1227 select WEAK_ORDERING
1231 depends on SYS_HAS_CPU_SB1
1233 select CPU_SUPPORTS_32BIT_KERNEL
1234 select CPU_SUPPORTS_64BIT_KERNEL
1235 select CPU_SUPPORTS_HIGHMEM
1236 select WEAK_ORDERING
1240 config SYS_HAS_CPU_LOONGSON2
1243 config SYS_HAS_CPU_MIPS32_R1
1246 config SYS_HAS_CPU_MIPS32_R2
1249 config SYS_HAS_CPU_MIPS64_R1
1252 config SYS_HAS_CPU_MIPS64_R2
1255 config SYS_HAS_CPU_R3000
1258 config SYS_HAS_CPU_TX39XX
1261 config SYS_HAS_CPU_VR41XX
1264 config SYS_HAS_CPU_R4300
1267 config SYS_HAS_CPU_R4X00
1270 config SYS_HAS_CPU_TX49XX
1273 config SYS_HAS_CPU_R5000
1276 config SYS_HAS_CPU_R5432
1279 config SYS_HAS_CPU_R6000
1282 config SYS_HAS_CPU_NEVADA
1285 config SYS_HAS_CPU_R8000
1288 config SYS_HAS_CPU_R10000
1291 config SYS_HAS_CPU_RM7000
1294 config SYS_HAS_CPU_RM9000
1297 config SYS_HAS_CPU_SB1
1301 # CPU may reorder R->R, R->W, W->R, W->W
1302 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1304 config WEAK_ORDERING
1308 # CPU may reorder reads and writes beyond LL/SC
1309 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1311 config WEAK_REORDERING_BEYOND_LLSC
1316 # These two indicate any level of the MIPS32 and MIPS64 architecture
1320 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1324 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1327 # These two indicate the revision of the architecture, either Release 1 or Release 2
1331 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1335 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2
1337 config SYS_SUPPORTS_32BIT_KERNEL
1339 config SYS_SUPPORTS_64BIT_KERNEL
1341 config CPU_SUPPORTS_32BIT_KERNEL
1343 config CPU_SUPPORTS_64BIT_KERNEL
1350 prompt "Kernel code model"
1352 You should only select this option if you have a workload that
1353 actually benefits from 64-bit processing or if your machine has
1354 large memory. You will only be presented a single option in this
1355 menu if your system does not support both 32-bit and 64-bit kernels.
1358 bool "32-bit kernel"
1359 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1362 Select this option if you want to build a 32-bit kernel.
1364 bool "64-bit kernel"
1365 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1367 Select this option if you want to build a 64-bit kernel.
1372 prompt "Kernel page size"
1373 default PAGE_SIZE_4KB
1375 config PAGE_SIZE_4KB
1378 This option select the standard 4kB Linux page size. On some
1379 R3000-family processors this is the only available page size. Using
1380 4kB page size will minimize memory consumption and is therefore
1381 recommended for low memory systems.
1383 config PAGE_SIZE_8KB
1385 depends on EXPERIMENTAL && CPU_R8000
1387 Using 8kB page size will result in higher performance kernel at
1388 the price of higher memory consumption. This option is available
1389 only on the R8000 processor. Not that at the time of this writing
1390 this option is still high experimental; there are also issues with
1391 compatibility of user applications.
1393 config PAGE_SIZE_16KB
1395 depends on !CPU_R3000 && !CPU_TX39XX
1397 Using 16kB page size will result in higher performance kernel at
1398 the price of higher memory consumption. This option is available on
1399 all non-R3000 family processors. Note that you will need a suitable
1400 Linux distribution to support this.
1402 config PAGE_SIZE_64KB
1404 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1406 Using 64kB page size will result in higher performance kernel at
1407 the price of higher memory consumption. This option is available on
1408 all non-R3000 family processor. Not that at the time of this
1409 writing this option is still high experimental.
1416 config IP22_CPU_SCACHE
1421 # Support for a MIPS32 / MIPS64 style S-caches
1423 config MIPS_CPU_SCACHE
1427 config R5000_CPU_SCACHE
1431 config RM7000_CPU_SCACHE
1435 config SIBYTE_DMA_PAGEOPS
1436 bool "Use DMA to clear/copy pages"
1439 Instead of using the CPU to zero and copy pages, use a Data Mover
1440 channel. These DMA channels are otherwise unused by the standard
1441 SiByte Linux port. Seems to give a small performance benefit.
1443 config CPU_HAS_PREFETCH
1447 prompt "MIPS MT options"
1449 config MIPS_MT_DISABLED
1450 bool "Disable multithreading support."
1452 Use this option if your workload can't take advantage of
1453 MIPS hardware multithreading support. On systems that don't have
1454 the option of an MT-enabled processor this option will be the only
1455 option in this menu.
1458 bool "Use 1 TC on each available VPE for SMP"
1459 depends on SYS_SUPPORTS_MULTITHREADING
1460 select CPU_MIPSR2_IRQ_VI
1461 select CPU_MIPSR2_IRQ_EI
1463 select NR_CPUS_DEFAULT_2
1465 select SYS_SUPPORTS_SCHED_SMT if SMP
1466 select SYS_SUPPORTS_SMP
1469 This is a kernel model which is also known a VSMP or lately
1470 has been marketesed into SMVP.
1473 bool "SMTC: Use all TCs on all VPEs for SMP"
1474 depends on CPU_MIPS32_R2
1475 #depends on CPU_MIPS64_R2 # once there is hardware ...
1476 depends on SYS_SUPPORTS_MULTITHREADING
1477 select GENERIC_CLOCKEVENTS_BROADCAST
1478 select CPU_MIPSR2_IRQ_VI
1479 select CPU_MIPSR2_IRQ_EI
1481 select NR_CPUS_DEFAULT_8
1483 select SYS_SUPPORTS_SMP
1486 This is a kernel model which is known a SMTC or lately has been
1487 marketesed into SMVP.
1495 bool "SMT (multithreading) scheduler support"
1496 depends on SYS_SUPPORTS_SCHED_SMT
1499 SMT scheduler support improves the CPU scheduler's decision making
1500 when dealing with MIPS MT enabled cores at a cost of slightly
1501 increased overhead in some places. If unsure say N here.
1503 config SYS_SUPPORTS_SCHED_SMT
1507 config SYS_SUPPORTS_MULTITHREADING
1510 config MIPS_MT_FPAFF
1511 bool "Dynamic FPU affinity for FP-intensive threads"
1513 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1515 config MIPS_VPE_LOADER
1516 bool "VPE loader support."
1517 depends on SYS_SUPPORTS_MULTITHREADING
1518 select CPU_MIPSR2_IRQ_VI
1519 select CPU_MIPSR2_IRQ_EI
1522 Includes a loader for loading an elf relocatable object
1523 onto another VPE and running it.
1525 config MIPS_MT_SMTC_INSTANT_REPLAY
1526 bool "Low-latency Dispatch of Deferred SMTC IPIs"
1527 depends on MIPS_MT_SMTC && !PREEMPT
1530 SMTC pseudo-interrupts between TCs are deferred and queued
1531 if the target TC is interrupt-inhibited (IXMT). In the first
1532 SMTC prototypes, these queued IPIs were serviced on return
1533 to user mode, or on entry into the kernel idle loop. The
1534 INSTANT_REPLAY option dispatches them as part of local_irq_restore()
1535 processing, which adds runtime overhead (hence the option to turn
1536 it off), but ensures that IPIs are handled promptly even under
1537 heavy I/O interrupt load.
1539 config MIPS_MT_SMTC_IM_BACKSTOP
1540 bool "Use per-TC register bits as backstop for inhibited IM bits"
1541 depends on MIPS_MT_SMTC
1544 To support multiple TC microthreads acting as "CPUs" within
1545 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1546 during interrupt handling. To support legacy drivers and interrupt
1547 controller management code, SMTC has a "backstop" to track and
1548 if necessary restore the interrupt mask. This has some performance
1549 impact on interrupt service overhead. Disable it only if you know
1552 config MIPS_MT_SMTC_IRQAFF
1553 bool "Support IRQ affinity API"
1554 depends on MIPS_MT_SMTC
1557 Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.)
1558 for SMTC Linux kernel. Requires platform support, of which
1559 an example can be found in the MIPS kernel i8259 and Malta
1560 platform code. It is recommended that MIPS_MT_SMTC_INSTANT_REPLAY
1561 be enabled if MIPS_MT_SMTC_IRQAFF is used. Adds overhead to
1562 interrupt dispatch, and should be used only if you know what
1565 config MIPS_VPE_LOADER_TOM
1566 bool "Load VPE program into memory hidden from linux"
1567 depends on MIPS_VPE_LOADER
1570 The loader can use memory that is present but has been hidden from
1571 Linux using the kernel command line option "mem=xxMB". It's up to
1572 you to ensure the amount you put in the option and the space your
1573 program requires is less or equal to the amount physically present.
1575 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1576 config MIPS_VPE_APSP_API
1577 bool "Enable support for AP/SP API (RTLX)"
1578 depends on MIPS_VPE_LOADER
1581 config MIPS_APSP_KSPD
1583 depends on MIPS_VPE_APSP_API
1586 KSPD is a kernel daemon that accepts syscall requests from the SP
1587 side, actions them and returns the results. It also handles the
1588 "exit" syscall notifying other kernel modules the SP program is
1589 exiting. You probably want to say yes here.
1591 config SB1_PASS_1_WORKAROUNDS
1593 depends on CPU_SB1_PASS_1
1596 config SB1_PASS_2_WORKAROUNDS
1598 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1601 config SB1_PASS_2_1_WORKAROUNDS
1603 depends on CPU_SB1 && CPU_SB1_PASS_2
1606 config 64BIT_PHYS_ADDR
1612 config CPU_HAS_SMARTMIPS
1613 depends on SYS_SUPPORTS_SMARTMIPS
1614 bool "Support for the SmartMIPS ASE"
1616 SmartMIPS is a extension of the MIPS32 architecture aimed at
1617 increased security at both hardware and software level for
1618 smartcards. Enabling this option will allow proper use of the
1619 SmartMIPS instructions by Linux applications. However a kernel with
1620 this option will not work on a MIPS core without SmartMIPS core. If
1621 you don't know you probably don't have SmartMIPS and should say N
1628 # Vectored interrupt mode is an R2 feature
1630 config CPU_MIPSR2_IRQ_VI
1634 # Extended interrupt mode is an R2 feature
1636 config CPU_MIPSR2_IRQ_EI
1641 depends on !CPU_R3000
1644 config GENERIC_CLOCKEVENTS_BROADCAST
1650 config CPU_DADDI_WORKAROUNDS
1653 config CPU_R4000_WORKAROUNDS
1655 select CPU_R4400_WORKAROUNDS
1657 config CPU_R4400_WORKAROUNDS
1661 # Use the generic interrupt handling code in kernel/irq/:
1663 config GENERIC_HARDIRQS
1667 config GENERIC_IRQ_PROBE
1675 # - Highmem only makes sense for the 32-bit kernel.
1676 # - The current highmem code will only work properly on physically indexed
1677 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1678 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1679 # moment we protect the user and offer the highmem option only on machines
1680 # where it's known to be safe. This will not offer highmem on a few systems
1681 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1682 # indexed CPUs but we're playing safe.
1683 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1684 # know they might have memory configurations that could make use of highmem
1688 bool "High Memory Support"
1689 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1691 config CPU_SUPPORTS_HIGHMEM
1694 config SYS_SUPPORTS_HIGHMEM
1697 config SYS_SUPPORTS_SMARTMIPS
1700 config ARCH_FLATMEM_ENABLE
1704 config ARCH_DISCONTIGMEM_ENABLE
1706 default y if SGI_IP27
1708 Say Y to support efficient handling of discontiguous physical memory,
1709 for architectures which are either NUMA (Non-Uniform Memory Access)
1710 or have huge holes in the physical address space for other reasons.
1711 See <file:Documentation/vm/numa> for more.
1713 config ARCH_POPULATES_NODE_MAP
1716 config ARCH_SPARSEMEM_ENABLE
1718 select SPARSEMEM_STATIC
1722 depends on SYS_SUPPORTS_NUMA
1724 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1725 Access). This option improves performance on systems with more
1726 than two nodes; on two node systems it is generally better to
1727 leave it disabled; on single node systems disable this option
1730 config SYS_SUPPORTS_NUMA
1736 depends on NEED_MULTIPLE_NODES
1741 bool "Multi-Processing support"
1742 depends on SYS_SUPPORTS_SMP
1745 This enables support for systems with more than one CPU. If you have
1746 a system with only one CPU, like most personal computers, say N. If
1747 you have a system with more than one CPU, say Y.
1749 If you say N here, the kernel will run on single and multiprocessor
1750 machines, but will use only one CPU of a multiprocessor machine. If
1751 you say Y here, the kernel will run on many, but not all,
1752 singleprocessor machines. On a singleprocessor machine, the kernel
1753 will run faster if you say N here.
1755 People using multiprocessor machines who say Y here should also say
1756 Y to "Enhanced Real Time Clock Support", below.
1758 See also the SMP-HOWTO available at
1759 <http://www.tldp.org/docs.html#howto>.
1761 If you don't know what to do here, say N.
1766 config SYS_SUPPORTS_SMP
1769 config NR_CPUS_DEFAULT_1
1772 config NR_CPUS_DEFAULT_2
1775 config NR_CPUS_DEFAULT_4
1778 config NR_CPUS_DEFAULT_8
1781 config NR_CPUS_DEFAULT_16
1784 config NR_CPUS_DEFAULT_32
1787 config NR_CPUS_DEFAULT_64
1791 int "Maximum number of CPUs (2-64)"
1792 range 1 64 if NR_CPUS_DEFAULT_1
1794 default "1" if NR_CPUS_DEFAULT_1
1795 default "2" if NR_CPUS_DEFAULT_2
1796 default "4" if NR_CPUS_DEFAULT_4
1797 default "8" if NR_CPUS_DEFAULT_8
1798 default "16" if NR_CPUS_DEFAULT_16
1799 default "32" if NR_CPUS_DEFAULT_32
1800 default "64" if NR_CPUS_DEFAULT_64
1802 This allows you to specify the maximum number of CPUs which this
1803 kernel will support. The maximum supported value is 32 for 32-bit
1804 kernel and 64 for 64-bit kernels; the minimum value which makes
1805 sense is 1 for Qemu (useful only for kernel debugging purposes)
1806 and 2 for all others.
1808 This is purely to save memory - each supported CPU adds
1809 approximately eight kilobytes to the kernel image. For best
1810 performance should round up your number of processors to the next
1813 source "kernel/time/Kconfig"
1816 # Timer Interrupt Frequency Configuration
1820 prompt "Timer frequency"
1823 Allows the configuration of the timer frequency.
1826 bool "48 HZ" if SYS_SUPPORTS_48HZ
1829 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1832 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1835 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1838 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1841 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1844 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1848 config SYS_SUPPORTS_48HZ
1851 config SYS_SUPPORTS_100HZ
1854 config SYS_SUPPORTS_128HZ
1857 config SYS_SUPPORTS_250HZ
1860 config SYS_SUPPORTS_256HZ
1863 config SYS_SUPPORTS_1000HZ
1866 config SYS_SUPPORTS_1024HZ
1869 config SYS_SUPPORTS_ARBIT_HZ
1871 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1872 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1873 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1874 !SYS_SUPPORTS_1024HZ
1879 default 100 if HZ_100
1880 default 128 if HZ_128
1881 default 250 if HZ_250
1882 default 256 if HZ_256
1883 default 1000 if HZ_1000
1884 default 1024 if HZ_1024
1886 source "kernel/Kconfig.preempt"
1888 config MIPS_INSANE_LARGE
1889 bool "Support for large 64-bit configurations"
1890 depends on CPU_R10000 && 64BIT
1892 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1893 previous 64-bit processors which only supported 40 bit / 1TB. If you
1894 need processes of more than 1TB virtual address space, say Y here.
1895 This will result in additional memory usage, so it is not
1896 recommended for normal users.
1899 bool "Kexec system call (EXPERIMENTAL)"
1900 depends on EXPERIMENTAL
1902 kexec is a system call that implements the ability to shutdown your
1903 current kernel, and to start another kernel. It is like a reboot
1904 but it is independent of the system firmware. And like a reboot
1905 you can start any kernel with it, not just Linux.
1907 The name comes from the similarity to the exec system call.
1909 It is an ongoing process to be certain the hardware in a machine
1910 is properly shutdown, so do not be surprised if this code does not
1911 initially work for you. It may help to enable device hotplugging
1912 support. As of this writing the exact hardware interface is
1913 strongly in flux, so no good recommendation can be made.
1916 bool "Enable seccomp to safely compute untrusted bytecode"
1920 This kernel feature is useful for number crunching applications
1921 that may need to compute untrusted bytecode during their
1922 execution. By using pipes or other transports made available to
1923 the process as file descriptors supporting the read/write
1924 syscalls, it's possible to isolate those applications in
1925 their own address space using seccomp. Once seccomp is
1926 enabled via /proc/<pid>/seccomp, it cannot be disabled
1927 and the task is only allowed to execute a few safe syscalls
1928 defined by each seccomp mode.
1930 If unsure, say Y. Only embedded should say N here.
1934 config RWSEM_GENERIC_SPINLOCK
1938 config LOCKDEP_SUPPORT
1942 config STACKTRACE_SUPPORT
1946 source "init/Kconfig"
1948 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1956 bool "Support for PCI controller"
1957 depends on HW_HAS_PCI
1960 Find out whether you have a PCI motherboard. PCI is the name of a
1961 bus system, i.e. the way the CPU talks to the other stuff inside
1962 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
1968 source "drivers/pci/Kconfig"
1971 # ISA support is now enabled via select. Too many systems still have the one
1972 # or other ISA chip on the board that users don't know about so don't expect
1973 # users to choose the right thing ...
1980 depends on HW_HAS_EISA
1982 select GENERIC_ISA_DMA
1984 The Extended Industry Standard Architecture (EISA) bus was
1985 developed as an open alternative to the IBM MicroChannel bus.
1987 The EISA bus provided some of the features of the IBM MicroChannel
1988 bus while maintaining backward compatibility with cards made for
1989 the older ISA bus. The EISA bus saw limited use between 1988 and
1990 1995 when it was made obsolete by the PCI bus.
1992 Say Y here if you are building a kernel for an EISA-based machine.
1996 source "drivers/eisa/Kconfig"
1999 bool "TURBOchannel support"
2000 depends on MACH_DECSTATION
2002 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
2003 processors. Documentation on writing device drivers for TurboChannel
2005 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
2008 # bool "Access.Bus support"
2021 source "drivers/pcmcia/Kconfig"
2023 source "drivers/pci/hotplug/Kconfig"
2027 menu "Executable file formats"
2029 source "fs/Kconfig.binfmt"
2035 bool "Include IRIX binary compatibility"
2036 depends on CPU_BIG_ENDIAN && 32BIT && BROKEN
2038 config MIPS32_COMPAT
2039 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
2042 Select this option if you want Linux/MIPS 32-bit binary
2043 compatibility. Since all software available for Linux/MIPS is
2044 currently 32-bit you should say Y here.
2048 depends on MIPS32_COMPAT
2051 config SYSVIPC_COMPAT
2053 depends on COMPAT && SYSVIPC
2057 bool "Kernel support for o32 binaries"
2058 depends on MIPS32_COMPAT
2060 Select this option if you want to run o32 binaries. These are pure
2061 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
2062 existing binaries are in this format.
2067 bool "Kernel support for n32 binaries"
2068 depends on MIPS32_COMPAT
2070 Select this option if you want to run n32 binaries. These are
2071 64-bit binaries using 32-bit quantities for addressing and certain
2072 data that would normally be 64-bit. They are used in special
2079 default y if MIPS32_O32 || MIPS32_N32
2083 menu "Power management options"
2085 config ARCH_SUSPEND_POSSIBLE
2089 source "kernel/power/Kconfig"
2093 source "net/Kconfig"
2095 source "drivers/Kconfig"
2099 source "arch/mips/Kconfig.debug"
2101 source "security/Kconfig"
2103 source "crypto/Kconfig"
2105 source "lib/Kconfig"