4 # Horrible source of confusion. Die, die, die ...
7 mainmenu "Linux/MIPS Kernel Configuration"
9 menu "Machine selection"
19 bool "Alchemy processor based machines"
22 bool "Basler eXcite smart camera"
29 select SYS_HAS_CPU_RM9000
30 select SYS_SUPPORTS_32BIT_KERNEL
31 select SYS_SUPPORTS_64BIT_KERNEL
32 select SYS_SUPPORTS_BIG_ENDIAN
33 select SYS_SUPPORTS_KGDB
35 The eXcite is a smart camera platform manufactured by
36 Basler Vision Technologies AG.
38 config BASLER_EXCITE_PROTOTYPE
39 bool "Support for pre-release units"
40 depends on BASLER_EXCITE
43 Pre-series (prototype) units are different from later ones in
44 some ways. Select this option if you have one of these. Please
45 note that a kernel built with this option selected will not be
46 able to run on normal units.
50 select DMA_NONCOHERENT
54 select PCI_GT64XXX_PCI0
55 select SYS_HAS_CPU_NEVADA
56 select SYS_HAS_EARLY_PRINTK
57 select SYS_SUPPORTS_32BIT_KERNEL
58 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
59 select SYS_SUPPORTS_LITTLE_ENDIAN
60 select GENERIC_HARDIRQS_NO__DO_IRQ
62 config MACH_DECSTATION
65 select DMA_NONCOHERENT
68 select SYS_HAS_CPU_R3000
69 select SYS_HAS_CPU_R4X00
70 select SYS_SUPPORTS_32BIT_KERNEL
71 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
72 select SYS_SUPPORTS_LITTLE_ENDIAN
73 select SYS_SUPPORTS_128HZ
74 select SYS_SUPPORTS_256HZ
75 select SYS_SUPPORTS_1024HZ
77 This enables support for DEC's MIPS based workstations. For details
78 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
79 DECstation porting pages on <http://decstation.unix-ag.org/>.
81 If you have one of the following DECstation Models you definitely
82 want to choose R4xx0 for the CPU Type:
89 otherwise choose R3000.
92 bool "Jazz family of machines"
95 select ARCH_MAY_HAVE_PC_FDC
96 select GENERIC_ISA_DMA
100 select SYS_HAS_CPU_R4X00
101 select SYS_SUPPORTS_32BIT_KERNEL
102 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
103 select SYS_SUPPORTS_100HZ
104 select GENERIC_HARDIRQS_NO__DO_IRQ
106 This a family of machines based on the MIPS R4030 chipset which was
107 used by several vendors to build RISC/os and Windows NT workstations.
108 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millenium and
109 Olivetti M700-10 workstations.
112 bool "Lemote Fulong mini-PC"
113 select ARCH_SPARSEMEM_ENABLE
114 select SYS_HAS_CPU_LOONGSON2
115 select DMA_NONCOHERENT
118 select HAVE_STD_PC_SERIAL_PORT
123 select SYS_SUPPORTS_32BIT_KERNEL
124 select SYS_SUPPORTS_64BIT_KERNEL
125 select SYS_SUPPORTS_LITTLE_ENDIAN
126 select SYS_SUPPORTS_HIGHMEM
127 select SYS_HAS_EARLY_PRINTK
128 select GENERIC_HARDIRQS_NO__DO_IRQ
131 Lemote Fulong mini-PC board based on the Chinese Loongson-2E CPU and
135 bool "MIPS Atlas board"
137 select DMA_NONCOHERENT
138 select SYS_HAS_EARLY_PRINTK
141 select MIPS_BOARDS_GEN
143 select PCI_GT64XXX_PCI0
145 select RM7000_CPU_SCACHE
147 select SYS_HAS_CPU_MIPS32_R1
148 select SYS_HAS_CPU_MIPS32_R2
149 select SYS_HAS_CPU_MIPS64_R1
150 select SYS_HAS_CPU_NEVADA
151 select SYS_HAS_CPU_RM7000
152 select SYS_SUPPORTS_32BIT_KERNEL
153 select SYS_SUPPORTS_64BIT_KERNEL
154 select SYS_SUPPORTS_BIG_ENDIAN
155 select SYS_SUPPORTS_LITTLE_ENDIAN
156 select SYS_SUPPORTS_MULTITHREADING if EXPERIMENTAL
157 select SYS_SUPPORTS_SMARTMIPS
158 select GENERIC_HARDIRQS_NO__DO_IRQ
160 This enables support for the MIPS Technologies Atlas evaluation
164 bool "MIPS Malta board"
165 select ARCH_MAY_HAVE_PC_FDC
167 select DMA_NONCOHERENT
168 select GENERIC_ISA_DMA
172 select MIPS_BOARDS_GEN
174 select MIPS_CPU_SCACHE
175 select PCI_GT64XXX_PCI0
178 select SYS_HAS_CPU_MIPS32_R1
179 select SYS_HAS_CPU_MIPS32_R2
180 select SYS_HAS_CPU_MIPS64_R1
181 select SYS_HAS_CPU_NEVADA
182 select SYS_HAS_CPU_RM7000
183 select SYS_HAS_EARLY_PRINTK
184 select SYS_SUPPORTS_32BIT_KERNEL
185 select SYS_SUPPORTS_64BIT_KERNEL
186 select SYS_SUPPORTS_BIG_ENDIAN
187 select SYS_SUPPORTS_LITTLE_ENDIAN
188 select SYS_SUPPORTS_MULTITHREADING
189 select SYS_SUPPORTS_SMARTMIPS
191 This enables support for the MIPS Technologies Malta evaluation
195 bool "MIPS SEAD board (EXPERIMENTAL)"
196 depends on EXPERIMENTAL
198 select DMA_NONCOHERENT
199 select SYS_HAS_EARLY_PRINTK
200 select MIPS_BOARDS_GEN
201 select SYS_HAS_CPU_MIPS32_R1
202 select SYS_HAS_CPU_MIPS32_R2
203 select SYS_HAS_CPU_MIPS64_R1
204 select SYS_SUPPORTS_32BIT_KERNEL
205 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
206 select SYS_SUPPORTS_BIG_ENDIAN
207 select SYS_SUPPORTS_LITTLE_ENDIAN
208 select SYS_SUPPORTS_SMARTMIPS
210 This enables support for the MIPS Technologies SEAD evaluation
214 bool 'MIPS simulator (MIPSsim)'
215 select DMA_NONCOHERENT
216 select SYS_HAS_EARLY_PRINTK
219 select SYS_HAS_CPU_MIPS32_R1
220 select SYS_HAS_CPU_MIPS32_R2
221 select SYS_HAS_EARLY_PRINTK
222 select SYS_SUPPORTS_32BIT_KERNEL
223 select SYS_SUPPORTS_BIG_ENDIAN
224 select SYS_SUPPORTS_MULTITHREADING
225 select SYS_SUPPORTS_LITTLE_ENDIAN
227 This option enables support for MIPS Technologies MIPSsim software
230 config MOMENCO_OCELOT
231 bool "Momentum Ocelot board"
232 select DMA_NONCOHERENT
236 select PCI_GT64XXX_PCI0
237 select RM7000_CPU_SCACHE
239 select SYS_HAS_CPU_RM7000
240 select SYS_SUPPORTS_32BIT_KERNEL
241 select SYS_SUPPORTS_64BIT_KERNEL
242 select SYS_SUPPORTS_BIG_ENDIAN
243 select SYS_SUPPORTS_KGDB
245 The Ocelot is a MIPS-based Single Board Computer (SBC) made by
246 Momentum Computer <http://www.momenco.com/>.
249 bool "NEC DDB Vrc-5477"
250 select DDB5XXX_COMMON
251 select DMA_NONCOHERENT
255 select SYS_HAS_CPU_R5432
256 select SYS_SUPPORTS_32BIT_KERNEL
257 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
258 select SYS_SUPPORTS_KGDB
259 select SYS_SUPPORTS_KGDB
260 select SYS_SUPPORTS_LITTLE_ENDIAN
262 This enables support for the R5432-based NEC DDB Vrc-5477,
263 or Rockhopper/SolutionGear boards with R5432/R5500 CPUs.
265 Features : kernel debugging, serial terminal, NFS root fs, on-board
266 ether port USB, AC97, PCI, etc.
269 bool "NEC EMMA2RH Mark-eins"
270 select DMA_NONCOHERENT
274 select SYS_SUPPORTS_32BIT_KERNEL
275 select SYS_SUPPORTS_BIG_ENDIAN
276 select SYS_SUPPORTS_LITTLE_ENDIAN
277 select SYS_HAS_CPU_R5000
279 This enables support for the R5432-based NEC Mark-eins
280 boards with R5500 CPU.
283 bool "NEC VR4100 series based machines"
284 select SYS_HAS_CPU_VR41XX
285 select GENERIC_HARDIRQS_NO__DO_IRQ
288 bool "Philips PNX8550 based JBS board"
290 select SYS_SUPPORTS_LITTLE_ENDIAN
292 config PNX8550_STB810
293 bool "Philips PNX8550 based STB810 board"
295 select SYS_SUPPORTS_LITTLE_ENDIAN
298 bool "PMC-Sierra MSP chipsets"
299 depends on EXPERIMENTAL
300 select DMA_NONCOHERENT
302 select NO_EXCEPT_FILL
304 select SYS_HAS_CPU_MIPS32_R1
305 select SYS_HAS_CPU_MIPS32_R2
306 select SYS_SUPPORTS_32BIT_KERNEL
307 select SYS_SUPPORTS_BIG_ENDIAN
308 select SYS_SUPPORTS_KGDB
311 select SERIAL_8250_CONSOLE
313 This adds support for the PMC-Sierra family of Multi-Service
314 Processor System-On-A-Chips. These parts include a number
315 of integrated peripherals, interfaces and DSPs in addition to
316 a variety of MIPS cores.
319 bool "PMC-Sierra Yosemite eval board"
326 select SYS_HAS_CPU_RM9000
327 select SYS_HAS_EARLY_PRINTK
328 select SYS_SUPPORTS_32BIT_KERNEL
329 select SYS_SUPPORTS_64BIT_KERNEL
330 select SYS_SUPPORTS_BIG_ENDIAN
331 select SYS_SUPPORTS_HIGHMEM
332 select SYS_SUPPORTS_KGDB
333 select SYS_SUPPORTS_SMP
335 Yosemite is an evaluation board for the RM9000x2 processor
336 manufactured by PMC-Sierra.
341 select GENERIC_ISA_DMA
342 select HAVE_STD_PC_SERIAL_PORT
347 select SYS_HAS_CPU_MIPS32_R1
348 select SYS_SUPPORTS_32BIT_KERNEL
349 select SYS_SUPPORTS_BIG_ENDIAN
350 select SYS_SUPPORTS_LITTLE_ENDIAN
351 select ARCH_SPARSEMEM_ENABLE
352 select GENERIC_HARDIRQS_NO__DO_IRQ
353 select NR_CPUS_DEFAULT_1
354 select SYS_SUPPORTS_SMP
356 Qemu is a software emulator which among other architectures also
357 can simulate a MIPS32 4Kc system. This patch adds support for the
358 system architecture that currently is being simulated by Qemu. It
359 will eventually be removed again when Qemu has the capability to
360 simulate actual MIPS hardware platforms. More information on Qemu
361 can be found at http://www.linux-mips.org/wiki/Qemu.
364 bool "SGI IP22 (Indy/Indigo2)"
368 select DMA_NONCOHERENT
370 select IP22_CPU_SCACHE
372 select GENERIC_ISA_DMA_SUPPORT_BROKEN
374 select SYS_HAS_CPU_R4X00
375 select SYS_HAS_CPU_R5000
376 select SYS_HAS_EARLY_PRINTK
377 select SYS_SUPPORTS_32BIT_KERNEL
378 select SYS_SUPPORTS_64BIT_KERNEL
379 select SYS_SUPPORTS_BIG_ENDIAN
381 This are the SGI Indy, Challenge S and Indigo2, as well as certain
382 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
383 that runs on these, say Y here.
386 bool "SGI IP27 (Origin200/2000)"
391 select SYS_HAS_EARLY_PRINTK
393 select NR_CPUS_DEFAULT_64
395 select SYS_HAS_CPU_R10000
396 select SYS_SUPPORTS_64BIT_KERNEL
397 select SYS_SUPPORTS_BIG_ENDIAN
398 select SYS_SUPPORTS_KGDB
399 select SYS_SUPPORTS_NUMA
400 select SYS_SUPPORTS_SMP
401 select GENERIC_HARDIRQS_NO__DO_IRQ
403 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
404 workstations. To compile a Linux kernel that runs on these, say Y
412 select DMA_NONCOHERENT
414 select R5000_CPU_SCACHE
415 select RM7000_CPU_SCACHE
416 select SYS_HAS_CPU_R5000
417 select SYS_HAS_CPU_R10000 if BROKEN
418 select SYS_HAS_CPU_RM7000
419 select SYS_HAS_CPU_NEVADA
420 select SYS_SUPPORTS_64BIT_KERNEL
421 select SYS_SUPPORTS_BIG_ENDIAN
423 If you want this kernel to run on SGI O2 workstation, say Y here.
426 bool "Sibyte BCM91120C-CRhine"
427 depends on EXPERIMENTAL
430 select SIBYTE_BCM1120
432 select SYS_HAS_CPU_SB1
433 select SYS_SUPPORTS_BIG_ENDIAN
434 select SYS_SUPPORTS_LITTLE_ENDIAN
437 bool "Sibyte BCM91120x-Carmel"
438 depends on EXPERIMENTAL
441 select SIBYTE_BCM1120
443 select SYS_HAS_CPU_SB1
444 select SYS_SUPPORTS_BIG_ENDIAN
445 select SYS_SUPPORTS_LITTLE_ENDIAN
448 bool "Sibyte BCM91125C-CRhone"
449 depends on EXPERIMENTAL
452 select SIBYTE_BCM1125
454 select SYS_HAS_CPU_SB1
455 select SYS_SUPPORTS_BIG_ENDIAN
456 select SYS_SUPPORTS_HIGHMEM
457 select SYS_SUPPORTS_LITTLE_ENDIAN
460 bool "Sibyte BCM91125E-Rhone"
461 depends on EXPERIMENTAL
464 select SIBYTE_BCM1125H
466 select SYS_HAS_CPU_SB1
467 select SYS_SUPPORTS_BIG_ENDIAN
468 select SYS_SUPPORTS_LITTLE_ENDIAN
471 bool "Sibyte BCM91250A-SWARM"
474 select NR_CPUS_DEFAULT_2
477 select SYS_HAS_CPU_SB1
478 select SYS_SUPPORTS_BIG_ENDIAN
479 select SYS_SUPPORTS_HIGHMEM
480 select SYS_SUPPORTS_KGDB
481 select SYS_SUPPORTS_LITTLE_ENDIAN
483 config SIBYTE_LITTLESUR
484 bool "Sibyte BCM91250C2-LittleSur"
485 depends on EXPERIMENTAL
488 select NR_CPUS_DEFAULT_2
491 select SYS_HAS_CPU_SB1
492 select SYS_SUPPORTS_BIG_ENDIAN
493 select SYS_SUPPORTS_HIGHMEM
494 select SYS_SUPPORTS_LITTLE_ENDIAN
496 config SIBYTE_SENTOSA
497 bool "Sibyte BCM91250E-Sentosa"
498 depends on EXPERIMENTAL
501 select NR_CPUS_DEFAULT_2
504 select SYS_HAS_CPU_SB1
505 select SYS_SUPPORTS_BIG_ENDIAN
506 select SYS_SUPPORTS_LITTLE_ENDIAN
508 config SIBYTE_PTSWARM
509 bool "Sibyte BCM91250PT-PTSWARM"
510 depends on EXPERIMENTAL
513 select NR_CPUS_DEFAULT_2
516 select SYS_HAS_CPU_SB1
517 select SYS_SUPPORTS_BIG_ENDIAN
518 select SYS_SUPPORTS_HIGHMEM
519 select SYS_SUPPORTS_LITTLE_ENDIAN
522 bool "Sibyte BCM91480B-BigSur"
525 select NR_CPUS_DEFAULT_4
527 select SIBYTE_BCM1x80
529 select SYS_HAS_CPU_SB1
530 select SYS_SUPPORTS_BIG_ENDIAN
531 select SYS_SUPPORTS_LITTLE_ENDIAN
534 bool "SNI RM200/300/400"
535 select ARC if CPU_LITTLE_ENDIAN
536 select ARC32 if CPU_LITTLE_ENDIAN
537 select ARCH_MAY_HAVE_PC_FDC
539 select DMA_NONCOHERENT
540 select GENERIC_ISA_DMA
547 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
548 select SYS_HAS_CPU_R4X00
549 select SYS_HAS_CPU_R5000
550 select SYS_HAS_CPU_R10000
551 select R5000_CPU_SCACHE
552 select SYS_HAS_EARLY_PRINTK
553 select SYS_SUPPORTS_32BIT_KERNEL
554 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
555 select SYS_SUPPORTS_BIG_ENDIAN
556 select SYS_SUPPORTS_HIGHMEM
557 select SYS_SUPPORTS_LITTLE_ENDIAN
559 The SNI RM200/300/400 are MIPS-based machines manufactured by
560 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
561 Technology and now in turn merged with Fujitsu. Say Y here to
562 support this machine type.
564 config TOSHIBA_JMR3927
565 bool "Toshiba JMR-TX3927 board"
566 select DMA_NONCOHERENT
570 select SYS_HAS_CPU_TX39XX
571 select SYS_SUPPORTS_32BIT_KERNEL
572 select SYS_SUPPORTS_LITTLE_ENDIAN
573 select SYS_SUPPORTS_BIG_ENDIAN
574 select GENERIC_HARDIRQS_NO__DO_IRQ
576 config TOSHIBA_RBTX4927
577 bool "Toshiba RBTX49[23]7 board"
578 select DMA_NONCOHERENT
579 select HAS_TXX9_SERIAL
583 select SYS_HAS_CPU_TX49XX
584 select SYS_SUPPORTS_32BIT_KERNEL
585 select SYS_SUPPORTS_64BIT_KERNEL
586 select SYS_SUPPORTS_LITTLE_ENDIAN
587 select SYS_SUPPORTS_BIG_ENDIAN
588 select SYS_SUPPORTS_KGDB
589 select GENERIC_HARDIRQS_NO__DO_IRQ
591 This Toshiba board is based on the TX4927 processor. Say Y here to
592 support this machine type
594 config TOSHIBA_RBTX4938
595 bool "Toshiba RBTX4938 board"
596 select HAVE_STD_PC_SERIAL_PORT
597 select DMA_NONCOHERENT
598 select GENERIC_ISA_DMA
599 select HAS_TXX9_SERIAL
603 select SYS_HAS_CPU_TX49XX
604 select SYS_SUPPORTS_32BIT_KERNEL
605 select SYS_SUPPORTS_LITTLE_ENDIAN
606 select SYS_SUPPORTS_BIG_ENDIAN
607 select SYS_SUPPORTS_KGDB
608 select GENERIC_HARDIRQS_NO__DO_IRQ
611 This Toshiba board is based on the TX4938 processor. Say Y here to
612 support this machine type
615 bool "Wind River PPMC board"
618 select DMA_NONCOHERENT
620 select PCI_GT64XXX_PCI0
622 select SYS_HAS_CPU_MIPS32_R1
623 select SYS_HAS_CPU_MIPS32_R2
624 select SYS_HAS_CPU_MIPS64_R1
625 select SYS_HAS_CPU_NEVADA
626 select SYS_HAS_CPU_RM7000
627 select SYS_SUPPORTS_32BIT_KERNEL
628 select SYS_SUPPORTS_64BIT_KERNEL
629 select SYS_SUPPORTS_BIG_ENDIAN
630 select SYS_SUPPORTS_LITTLE_ENDIAN
632 This enables support for the Wind River MIPS32 4KC PPMC evaluation
633 board, which is based on GT64120 bridge chip.
637 source "arch/mips/au1000/Kconfig"
638 source "arch/mips/ddb5xxx/Kconfig"
639 source "arch/mips/jazz/Kconfig"
640 source "arch/mips/pmc-sierra/Kconfig"
641 source "arch/mips/sgi-ip27/Kconfig"
642 source "arch/mips/sibyte/Kconfig"
643 source "arch/mips/tx4927/Kconfig"
644 source "arch/mips/tx4938/Kconfig"
645 source "arch/mips/vr41xx/Kconfig"
646 source "arch/mips/philips/pnx8550/common/Kconfig"
650 config RWSEM_GENERIC_SPINLOCK
654 config RWSEM_XCHGADD_ALGORITHM
657 config ARCH_HAS_ILOG2_U32
661 config ARCH_HAS_ILOG2_U64
665 config GENERIC_FIND_NEXT_BIT
669 config GENERIC_HWEIGHT
673 config GENERIC_CALIBRATE_DELAY
681 config SCHED_NO_NO_OMIT_FRAME_POINTER
685 config GENERIC_HARDIRQS_NO__DO_IRQ
690 # Select some configuration options automatically based on user selections.
695 config ARCH_MAY_HAVE_PC_FDC
709 select DMA_NEED_PCI_MAP_STATE
711 config DMA_NONCOHERENT
713 select DMA_NEED_PCI_MAP_STATE
715 config DMA_NEED_PCI_MAP_STATE
719 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
720 depends on SYS_HAS_EARLY_PRINTK
723 This option enables special console drivers which allow the kernel
724 to print messages very early in the bootup process.
726 This is useful for kernel debugging when your machine crashes very
727 early before the console code is initialized. For normal operation,
728 it is not recommended because it looks ugly on some machines and
729 doesn't cooperate with an X server. You should normally say N here,
730 unless you want to debug such a crash.
732 config SYS_HAS_EARLY_PRINTK
735 config GENERIC_ISA_DMA
748 config MIPS_DISABLE_OBSOLETE_IDE
754 config GENERIC_ISA_DMA_SUPPORT_BROKEN
762 # Endianess selection. Sufficiently obscure so many users don't know what to
763 # answer,so we try hard to limit the available choices. Also the use of a
764 # choice statement should be more obvious to the user.
767 prompt "Endianess selection"
769 Some MIPS machines can be configured for either little or big endian
770 byte order. These modes require different kernels and a different
771 Linux distribution. In general there is one preferred byteorder for a
772 particular system but some systems are just as commonly used in the
773 one or the other endianness.
775 config CPU_BIG_ENDIAN
777 depends on SYS_SUPPORTS_BIG_ENDIAN
779 config CPU_LITTLE_ENDIAN
781 depends on SYS_SUPPORTS_LITTLE_ENDIAN
786 config SYS_SUPPORTS_APM_EMULATION
789 config SYS_SUPPORTS_BIG_ENDIAN
792 config SYS_SUPPORTS_LITTLE_ENDIAN
810 config DDB5XXX_COMMON
812 select SYS_SUPPORTS_KGDB
814 config MIPS_BOARDS_GEN
817 config PCI_GT64XXX_PCI0
820 config NO_EXCEPT_FILL
825 select HAS_TXX9_SERIAL
837 select DMA_NONCOHERENT
839 select SYS_HAS_CPU_MIPS32_R1
840 select SYS_HAS_EARLY_PRINTK
841 select SYS_SUPPORTS_32BIT_KERNEL
842 select GENERIC_HARDIRQS_NO__DO_IRQ
843 select SYS_SUPPORTS_KGDB
858 # Unfortunately not all GT64120 systems run the chip at the same clock.
859 # As the user for the clock rate and try to minimize the available options.
862 prompt "Galileo Chip Clock"
863 depends on MOMENCO_OCELOT
864 default SYSCLK_100 if MOMENCO_OCELOT
867 bool "100" if MOMENCO_OCELOT
877 config MIPS_L1_CACHE_SHIFT
879 default "4" if MACH_DECSTATION
880 default "7" if SGI_IP27 || SNI_RM
881 default "4" if PMC_MSP4200_EVAL
884 config HAVE_STD_PC_SERIAL_PORT
888 bool "ARC console support"
889 depends on SGI_IP22 || (SNI_RM && CPU_LITTLE_ENDIAN)
893 depends on MACH_JAZZ || SNI_RM || SGI_IP32
898 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP32
915 depends on SYS_HAS_CPU_LOONGSON2
916 select CPU_SUPPORTS_32BIT_KERNEL
917 select CPU_SUPPORTS_64BIT_KERNEL
918 select CPU_SUPPORTS_HIGHMEM
920 The Loongson 2E processor implements the MIPS III instruction set
921 with many extensions.
924 bool "MIPS32 Release 1"
925 depends on SYS_HAS_CPU_MIPS32_R1
927 select CPU_HAS_PREFETCH
928 select CPU_SUPPORTS_32BIT_KERNEL
929 select CPU_SUPPORTS_HIGHMEM
931 Choose this option to build a kernel for release 1 or later of the
932 MIPS32 architecture. Most modern embedded systems with a 32-bit
933 MIPS processor are based on a MIPS32 processor. If you know the
934 specific type of processor in your system, choose those that one
935 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
936 Release 2 of the MIPS32 architecture is available since several
937 years so chances are you even have a MIPS32 Release 2 processor
938 in which case you should choose CPU_MIPS32_R2 instead for better
942 bool "MIPS32 Release 2"
943 depends on SYS_HAS_CPU_MIPS32_R2
945 select CPU_HAS_PREFETCH
946 select CPU_SUPPORTS_32BIT_KERNEL
947 select CPU_SUPPORTS_HIGHMEM
949 Choose this option to build a kernel for release 2 or later of the
950 MIPS32 architecture. Most modern embedded systems with a 32-bit
951 MIPS processor are based on a MIPS32 processor. If you know the
952 specific type of processor in your system, choose those that one
953 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
956 bool "MIPS64 Release 1"
957 depends on SYS_HAS_CPU_MIPS64_R1
959 select CPU_HAS_PREFETCH
960 select CPU_SUPPORTS_32BIT_KERNEL
961 select CPU_SUPPORTS_64BIT_KERNEL
962 select CPU_SUPPORTS_HIGHMEM
964 Choose this option to build a kernel for release 1 or later of the
965 MIPS64 architecture. Many modern embedded systems with a 64-bit
966 MIPS processor are based on a MIPS64 processor. If you know the
967 specific type of processor in your system, choose those that one
968 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
969 Release 2 of the MIPS64 architecture is available since several
970 years so chances are you even have a MIPS64 Release 2 processor
971 in which case you should choose CPU_MIPS64_R2 instead for better
975 bool "MIPS64 Release 2"
976 depends on SYS_HAS_CPU_MIPS64_R2
978 select CPU_HAS_PREFETCH
979 select CPU_SUPPORTS_32BIT_KERNEL
980 select CPU_SUPPORTS_64BIT_KERNEL
981 select CPU_SUPPORTS_HIGHMEM
983 Choose this option to build a kernel for release 2 or later of the
984 MIPS64 architecture. Many modern embedded systems with a 64-bit
985 MIPS processor are based on a MIPS64 processor. If you know the
986 specific type of processor in your system, choose those that one
987 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
991 depends on SYS_HAS_CPU_R3000
993 select CPU_SUPPORTS_32BIT_KERNEL
994 select CPU_SUPPORTS_HIGHMEM
996 Please make sure to pick the right CPU type. Linux/MIPS is not
997 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
998 *not* work on R4000 machines and vice versa. However, since most
999 of the supported machines have an R4000 (or similar) CPU, R4x00
1000 might be a safe bet. If the resulting kernel does not work,
1001 try to recompile with R3000.
1005 depends on SYS_HAS_CPU_TX39XX
1006 select CPU_SUPPORTS_32BIT_KERNEL
1010 depends on SYS_HAS_CPU_VR41XX
1011 select CPU_SUPPORTS_32BIT_KERNEL
1012 select CPU_SUPPORTS_64BIT_KERNEL
1014 The options selects support for the NEC VR4100 series of processors.
1015 Only choose this option if you have one of these processors as a
1016 kernel built with this option will not run on any other type of
1017 processor or vice versa.
1021 depends on SYS_HAS_CPU_R4300
1023 select CPU_SUPPORTS_32BIT_KERNEL
1024 select CPU_SUPPORTS_64BIT_KERNEL
1026 MIPS Technologies R4300-series processors.
1030 depends on SYS_HAS_CPU_R4X00
1032 select CPU_SUPPORTS_32BIT_KERNEL
1033 select CPU_SUPPORTS_64BIT_KERNEL
1035 MIPS Technologies R4000-series processors other than 4300, including
1036 the R4000, R4400, R4600, and 4700.
1040 depends on SYS_HAS_CPU_TX49XX
1042 select CPU_HAS_PREFETCH
1043 select CPU_SUPPORTS_32BIT_KERNEL
1044 select CPU_SUPPORTS_64BIT_KERNEL
1048 depends on SYS_HAS_CPU_R5000
1050 select CPU_SUPPORTS_32BIT_KERNEL
1051 select CPU_SUPPORTS_64BIT_KERNEL
1053 MIPS Technologies R5000-series processors other than the Nevada.
1057 depends on SYS_HAS_CPU_R5432
1059 select CPU_SUPPORTS_32BIT_KERNEL
1060 select CPU_SUPPORTS_64BIT_KERNEL
1064 depends on EXPERIMENTAL
1066 depends on SYS_HAS_CPU_R6000
1067 select CPU_SUPPORTS_32BIT_KERNEL
1069 MIPS Technologies R6000 and R6000A series processors. Note these
1070 processors are extremely rare and the support for them is incomplete.
1074 depends on SYS_HAS_CPU_NEVADA
1076 select CPU_SUPPORTS_32BIT_KERNEL
1077 select CPU_SUPPORTS_64BIT_KERNEL
1079 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1083 depends on EXPERIMENTAL
1084 depends on SYS_HAS_CPU_R8000
1086 select CPU_HAS_PREFETCH
1087 select CPU_SUPPORTS_64BIT_KERNEL
1089 MIPS Technologies R8000 processors. Note these processors are
1090 uncommon and the support for them is incomplete.
1094 depends on SYS_HAS_CPU_R10000
1096 select CPU_HAS_PREFETCH
1097 select CPU_SUPPORTS_32BIT_KERNEL
1098 select CPU_SUPPORTS_64BIT_KERNEL
1099 select CPU_SUPPORTS_HIGHMEM
1101 MIPS Technologies R10000-series processors.
1105 depends on SYS_HAS_CPU_RM7000
1107 select CPU_HAS_PREFETCH
1108 select CPU_SUPPORTS_32BIT_KERNEL
1109 select CPU_SUPPORTS_64BIT_KERNEL
1110 select CPU_SUPPORTS_HIGHMEM
1114 depends on SYS_HAS_CPU_RM9000
1116 select CPU_HAS_PREFETCH
1117 select CPU_SUPPORTS_32BIT_KERNEL
1118 select CPU_SUPPORTS_64BIT_KERNEL
1119 select CPU_SUPPORTS_HIGHMEM
1120 select WEAK_ORDERING
1124 depends on SYS_HAS_CPU_SB1
1126 select CPU_SUPPORTS_32BIT_KERNEL
1127 select CPU_SUPPORTS_64BIT_KERNEL
1128 select CPU_SUPPORTS_HIGHMEM
1129 select WEAK_ORDERING
1133 config SYS_HAS_CPU_LOONGSON2
1136 config SYS_HAS_CPU_MIPS32_R1
1139 config SYS_HAS_CPU_MIPS32_R2
1142 config SYS_HAS_CPU_MIPS64_R1
1145 config SYS_HAS_CPU_MIPS64_R2
1148 config SYS_HAS_CPU_R3000
1151 config SYS_HAS_CPU_TX39XX
1154 config SYS_HAS_CPU_VR41XX
1157 config SYS_HAS_CPU_R4300
1160 config SYS_HAS_CPU_R4X00
1163 config SYS_HAS_CPU_TX49XX
1166 config SYS_HAS_CPU_R5000
1169 config SYS_HAS_CPU_R5432
1172 config SYS_HAS_CPU_R6000
1175 config SYS_HAS_CPU_NEVADA
1178 config SYS_HAS_CPU_R8000
1181 config SYS_HAS_CPU_R10000
1184 config SYS_HAS_CPU_RM7000
1187 config SYS_HAS_CPU_RM9000
1190 config SYS_HAS_CPU_SB1
1194 # CPU may reorder R->R, R->W, W->R, W->W
1195 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1197 config WEAK_ORDERING
1201 # CPU may reorder reads and writes beyond LL/SC
1202 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1204 config WEAK_REORDERING_BEYOND_LLSC
1209 # These two indicate any level of the MIPS32 and MIPS64 architecture
1213 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1217 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1220 # These two indicate the revision of the architecture, either Release 1 or Release 2
1224 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1228 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2
1230 config SYS_SUPPORTS_32BIT_KERNEL
1232 config SYS_SUPPORTS_64BIT_KERNEL
1234 config CPU_SUPPORTS_32BIT_KERNEL
1236 config CPU_SUPPORTS_64BIT_KERNEL
1243 prompt "Kernel code model"
1245 You should only select this option if you have a workload that
1246 actually benefits from 64-bit processing or if your machine has
1247 large memory. You will only be presented a single option in this
1248 menu if your system does not support both 32-bit and 64-bit kernels.
1251 bool "32-bit kernel"
1252 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1255 Select this option if you want to build a 32-bit kernel.
1257 bool "64-bit kernel"
1258 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1260 Select this option if you want to build a 64-bit kernel.
1265 prompt "Kernel page size"
1266 default PAGE_SIZE_4KB
1268 config PAGE_SIZE_4KB
1271 This option select the standard 4kB Linux page size. On some
1272 R3000-family processors this is the only available page size. Using
1273 4kB page size will minimize memory consumption and is therefore
1274 recommended for low memory systems.
1276 config PAGE_SIZE_8KB
1278 depends on EXPERIMENTAL && CPU_R8000
1280 Using 8kB page size will result in higher performance kernel at
1281 the price of higher memory consumption. This option is available
1282 only on the R8000 processor. Not that at the time of this writing
1283 this option is still high experimental; there are also issues with
1284 compatibility of user applications.
1286 config PAGE_SIZE_16KB
1288 depends on !CPU_R3000 && !CPU_TX39XX
1290 Using 16kB page size will result in higher performance kernel at
1291 the price of higher memory consumption. This option is available on
1292 all non-R3000 family processors. Note that you will need a suitable
1293 Linux distribution to support this.
1295 config PAGE_SIZE_64KB
1297 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1299 Using 64kB page size will result in higher performance kernel at
1300 the price of higher memory consumption. This option is available on
1301 all non-R3000 family processor. Not that at the time of this
1302 writing this option is still high experimental.
1309 config IP22_CPU_SCACHE
1314 # Support for a MIPS32 / MIPS64 style S-caches
1316 config MIPS_CPU_SCACHE
1320 config R5000_CPU_SCACHE
1324 config RM7000_CPU_SCACHE
1328 config SIBYTE_DMA_PAGEOPS
1329 bool "Use DMA to clear/copy pages"
1332 Instead of using the CPU to zero and copy pages, use a Data Mover
1333 channel. These DMA channels are otherwise unused by the standard
1334 SiByte Linux port. Seems to give a small performance benefit.
1336 config CPU_HAS_PREFETCH
1340 prompt "MIPS MT options"
1342 config MIPS_MT_DISABLED
1343 bool "Disable multithreading support."
1345 Use this option if your workload can't take advantage of
1346 MIPS hardware multithreading support. On systems that don't have
1347 the option of an MT-enabled processor this option will be the only
1348 option in this menu.
1351 bool "Use 1 TC on each available VPE for SMP"
1352 depends on SYS_SUPPORTS_MULTITHREADING
1353 select CPU_MIPSR2_IRQ_VI
1354 select CPU_MIPSR2_IRQ_EI
1355 select CPU_MIPSR2_SRS
1357 select NR_CPUS_DEFAULT_2
1359 select SYS_SUPPORTS_SMP
1361 This is a kernel model which is also known a VSMP or lately
1362 has been marketesed into SMVP.
1365 bool "SMTC: Use all TCs on all VPEs for SMP"
1366 depends on CPU_MIPS32_R2
1367 #depends on CPU_MIPS64_R2 # once there is hardware ...
1368 depends on SYS_SUPPORTS_MULTITHREADING
1369 select CPU_MIPSR2_IRQ_VI
1370 select CPU_MIPSR2_IRQ_EI
1371 select CPU_MIPSR2_SRS
1373 select NR_CPUS_DEFAULT_8
1375 select SYS_SUPPORTS_SMP
1377 This is a kernel model which is known a SMTC or lately has been
1378 marketesed into SMVP.
1385 config SYS_SUPPORTS_MULTITHREADING
1388 config MIPS_MT_FPAFF
1389 bool "Dynamic FPU affinity for FP-intensive threads"
1391 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1393 config MIPS_VPE_LOADER
1394 bool "VPE loader support."
1395 depends on SYS_SUPPORTS_MULTITHREADING
1396 select CPU_MIPSR2_IRQ_VI
1397 select CPU_MIPSR2_IRQ_EI
1398 select CPU_MIPSR2_SRS
1401 Includes a loader for loading an elf relocatable object
1402 onto another VPE and running it.
1404 config MIPS_MT_SMTC_INSTANT_REPLAY
1405 bool "Low-latency Dispatch of Deferred SMTC IPIs"
1406 depends on MIPS_MT_SMTC && !PREEMPT
1409 SMTC pseudo-interrupts between TCs are deferred and queued
1410 if the target TC is interrupt-inhibited (IXMT). In the first
1411 SMTC prototypes, these queued IPIs were serviced on return
1412 to user mode, or on entry into the kernel idle loop. The
1413 INSTANT_REPLAY option dispatches them as part of local_irq_restore()
1414 processing, which adds runtime overhead (hence the option to turn
1415 it off), but ensures that IPIs are handled promptly even under
1416 heavy I/O interrupt load.
1418 config MIPS_MT_SMTC_IM_BACKSTOP
1419 bool "Use per-TC register bits as backstop for inhibited IM bits"
1420 depends on MIPS_MT_SMTC
1423 To support multiple TC microthreads acting as "CPUs" within
1424 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1425 during interrupt handling. To support legacy drivers and interrupt
1426 controller management code, SMTC has a "backstop" to track and
1427 if necessary restore the interrupt mask. This has some performance
1428 impact on interrupt service overhead. Disable it only if you know
1431 config MIPS_VPE_LOADER_TOM
1432 bool "Load VPE program into memory hidden from linux"
1433 depends on MIPS_VPE_LOADER
1436 The loader can use memory that is present but has been hidden from
1437 Linux using the kernel command line option "mem=xxMB". It's up to
1438 you to ensure the amount you put in the option and the space your
1439 program requires is less or equal to the amount physically present.
1441 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1442 config MIPS_VPE_APSP_API
1443 bool "Enable support for AP/SP API (RTLX)"
1444 depends on MIPS_VPE_LOADER
1447 config MIPS_APSP_KSPD
1449 depends on MIPS_VPE_APSP_API
1452 KSPD is a kernel daemon that accepts syscall requests from the SP
1453 side, actions them and returns the results. It also handles the
1454 "exit" syscall notifying other kernel modules the SP program is
1455 exiting. You probably want to say yes here.
1457 config SB1_PASS_1_WORKAROUNDS
1459 depends on CPU_SB1_PASS_1
1462 config SB1_PASS_2_WORKAROUNDS
1464 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1467 config SB1_PASS_2_1_WORKAROUNDS
1469 depends on CPU_SB1 && CPU_SB1_PASS_2
1472 config 64BIT_PHYS_ADDR
1473 bool "Support for 64-bit physical address space"
1474 depends on (CPU_R4X00 || CPU_R5000 || CPU_RM7000 || CPU_RM9000 || CPU_R10000 || CPU_SB1 || CPU_MIPS32 || CPU_MIPS64) && 32BIT
1479 config CPU_HAS_SMARTMIPS
1480 depends on SYS_SUPPORTS_SMARTMIPS
1481 bool "Support for the SmartMIPS ASE"
1483 SmartMIPS is a extension of the MIPS32 architecture aimed at
1484 increased security at both hardware and software level for
1485 smartcards. Enabling this option will allow proper use of the
1486 SmartMIPS instructions by Linux applications. However a kernel with
1487 this option will not work on a MIPS core without SmartMIPS core. If
1488 you don't know you probably don't have SmartMIPS and should say N
1494 config 64BIT_CONTEXT
1495 bool "Save 64bit integer registers"
1496 depends on 32BIT && CPU_LOONGSON2
1498 Loongson2 CPU is 64bit , when used in 32BIT mode, its integer
1499 registers can still be accessed as 64bit, mainly for multimedia
1500 instructions. We must have all 64bit save/restored to make sure
1501 those instructions to get correct result.
1504 # Vectored interrupt mode is an R2 feature
1506 config CPU_MIPSR2_IRQ_VI
1510 # Extended interrupt mode is an R2 feature
1512 config CPU_MIPSR2_IRQ_EI
1516 # Shadow registers are an R2 feature
1518 config CPU_MIPSR2_SRS
1523 depends on !CPU_R3000
1527 # Use the generic interrupt handling code in kernel/irq/:
1529 config GENERIC_HARDIRQS
1533 config GENERIC_IRQ_PROBE
1541 # - Highmem only makes sense for the 32-bit kernel.
1542 # - The current highmem code will only work properly on physically indexed
1543 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1544 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1545 # moment we protect the user and offer the highmem option only on machines
1546 # where it's known to be safe. This will not offer highmem on a few systems
1547 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1548 # indexed CPUs but we're playing safe.
1549 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1550 # know they might have memory configurations that could make use of highmem
1554 bool "High Memory Support"
1555 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1557 config CPU_SUPPORTS_HIGHMEM
1560 config SYS_SUPPORTS_HIGHMEM
1563 config SYS_SUPPORTS_SMARTMIPS
1566 config ARCH_FLATMEM_ENABLE
1570 config ARCH_DISCONTIGMEM_ENABLE
1572 default y if SGI_IP27
1574 Say Y to support efficient handling of discontiguous physical memory,
1575 for architectures which are either NUMA (Non-Uniform Memory Access)
1576 or have huge holes in the physical address space for other reasons.
1577 See <file:Documentation/vm/numa> for more.
1579 config ARCH_SPARSEMEM_ENABLE
1581 select SPARSEMEM_STATIC
1585 depends on SYS_SUPPORTS_NUMA
1587 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1588 Access). This option improves performance on systems with more
1589 than two nodes; on two node systems it is generally better to
1590 leave it disabled; on single node systems disable this option
1593 config SYS_SUPPORTS_NUMA
1599 depends on NEED_MULTIPLE_NODES
1604 bool "Multi-Processing support"
1605 depends on SYS_SUPPORTS_SMP
1608 This enables support for systems with more than one CPU. If you have
1609 a system with only one CPU, like most personal computers, say N. If
1610 you have a system with more than one CPU, say Y.
1612 If you say N here, the kernel will run on single and multiprocessor
1613 machines, but will use only one CPU of a multiprocessor machine. If
1614 you say Y here, the kernel will run on many, but not all,
1615 singleprocessor machines. On a singleprocessor machine, the kernel
1616 will run faster if you say N here.
1618 People using multiprocessor machines who say Y here should also say
1619 Y to "Enhanced Real Time Clock Support", below.
1621 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
1622 available at <http://www.tldp.org/docs.html#howto>.
1624 If you don't know what to do here, say N.
1626 config SYS_SUPPORTS_SMP
1629 config NR_CPUS_DEFAULT_1
1632 config NR_CPUS_DEFAULT_2
1635 config NR_CPUS_DEFAULT_4
1638 config NR_CPUS_DEFAULT_8
1641 config NR_CPUS_DEFAULT_16
1644 config NR_CPUS_DEFAULT_32
1647 config NR_CPUS_DEFAULT_64
1651 int "Maximum number of CPUs (2-64)"
1652 range 1 64 if NR_CPUS_DEFAULT_1
1654 default "1" if NR_CPUS_DEFAULT_1
1655 default "2" if NR_CPUS_DEFAULT_2
1656 default "4" if NR_CPUS_DEFAULT_4
1657 default "8" if NR_CPUS_DEFAULT_8
1658 default "16" if NR_CPUS_DEFAULT_16
1659 default "32" if NR_CPUS_DEFAULT_32
1660 default "64" if NR_CPUS_DEFAULT_64
1662 This allows you to specify the maximum number of CPUs which this
1663 kernel will support. The maximum supported value is 32 for 32-bit
1664 kernel and 64 for 64-bit kernels; the minimum value which makes
1665 sense is 1 for Qemu (useful only for kernel debugging purposes)
1666 and 2 for all others.
1668 This is purely to save memory - each supported CPU adds
1669 approximately eight kilobytes to the kernel image. For best
1670 performance should round up your number of processors to the next
1674 # Timer Interrupt Frequency Configuration
1678 prompt "Timer frequency"
1681 Allows the configuration of the timer frequency.
1684 bool "48 HZ" if SYS_SUPPORTS_48HZ
1687 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1690 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1693 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1696 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1699 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1702 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1706 config SYS_SUPPORTS_48HZ
1709 config SYS_SUPPORTS_100HZ
1712 config SYS_SUPPORTS_128HZ
1715 config SYS_SUPPORTS_250HZ
1718 config SYS_SUPPORTS_256HZ
1721 config SYS_SUPPORTS_1000HZ
1724 config SYS_SUPPORTS_1024HZ
1727 config SYS_SUPPORTS_ARBIT_HZ
1729 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1730 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1731 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1732 !SYS_SUPPORTS_1024HZ
1737 default 100 if HZ_100
1738 default 128 if HZ_128
1739 default 250 if HZ_250
1740 default 256 if HZ_256
1741 default 1000 if HZ_1000
1742 default 1024 if HZ_1024
1744 source "kernel/Kconfig.preempt"
1746 config MIPS_INSANE_LARGE
1747 bool "Support for large 64-bit configurations"
1748 depends on CPU_R10000 && 64BIT
1750 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1751 previous 64-bit processors which only supported 40 bit / 1TB. If you
1752 need processes of more than 1TB virtual address space, say Y here.
1753 This will result in additional memory usage, so it is not
1754 recommended for normal users.
1757 bool "Kexec system call (EXPERIMENTAL)"
1758 depends on EXPERIMENTAL
1760 kexec is a system call that implements the ability to shutdown your
1761 current kernel, and to start another kernel. It is like a reboot
1762 but it is independent of the system firmware. And like a reboot
1763 you can start any kernel with it, not just Linux.
1765 The name comes from the similiarity to the exec system call.
1767 It is an ongoing process to be certain the hardware in a machine
1768 is properly shutdown, so do not be surprised if this code does not
1769 initially work for you. It may help to enable device hotplugging
1770 support. As of this writing the exact hardware interface is
1771 strongly in flux, so no good recommendation can be made.
1774 bool "Enable seccomp to safely compute untrusted bytecode"
1778 This kernel feature is useful for number crunching applications
1779 that may need to compute untrusted bytecode during their
1780 execution. By using pipes or other transports made available to
1781 the process as file descriptors supporting the read/write
1782 syscalls, it's possible to isolate those applications in
1783 their own address space using seccomp. Once seccomp is
1784 enabled via /proc/<pid>/seccomp, it cannot be disabled
1785 and the task is only allowed to execute a few safe syscalls
1786 defined by each seccomp mode.
1788 If unsure, say Y. Only embedded should say N here.
1792 config RWSEM_GENERIC_SPINLOCK
1796 config LOCKDEP_SUPPORT
1800 config STACKTRACE_SUPPORT
1804 source "init/Kconfig"
1806 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1814 bool "Support for PCI controller"
1815 depends on HW_HAS_PCI
1817 Find out whether you have a PCI motherboard. PCI is the name of a
1818 bus system, i.e. the way the CPU talks to the other stuff inside
1819 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
1822 The PCI-HOWTO, available from
1823 <http://www.tldp.org/docs.html#howto>, contains valuable
1824 information about which PCI hardware does work under Linux and which
1831 source "drivers/pci/Kconfig"
1834 # ISA support is now enabled via select. Too many systems still have the one
1835 # or other ISA chip on the board that users don't know about so don't expect
1836 # users to choose the right thing ...
1843 depends on HW_HAS_EISA
1845 select GENERIC_ISA_DMA
1847 The Extended Industry Standard Architecture (EISA) bus was
1848 developed as an open alternative to the IBM MicroChannel bus.
1850 The EISA bus provided some of the features of the IBM MicroChannel
1851 bus while maintaining backward compatibility with cards made for
1852 the older ISA bus. The EISA bus saw limited use between 1988 and
1853 1995 when it was made obsolete by the PCI bus.
1855 Say Y here if you are building a kernel for an EISA-based machine.
1859 source "drivers/eisa/Kconfig"
1862 bool "TURBOchannel support"
1863 depends on MACH_DECSTATION
1865 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
1866 processors. Documentation on writing device drivers for TurboChannel
1868 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
1871 # bool "Access.Bus support"
1881 source "drivers/pcmcia/Kconfig"
1883 source "drivers/pci/hotplug/Kconfig"
1887 menu "Executable file formats"
1889 source "fs/Kconfig.binfmt"
1895 bool "Use 64-bit ELF format for building"
1898 A 64-bit kernel is usually built using the 64-bit ELF binary object
1899 format as it's one that allows arbitrary 64-bit constructs. For
1900 kernels that are loaded within the KSEG compatibility segments the
1901 32-bit ELF format can optionally be used resulting in a somewhat
1902 smaller binary, but this option is not explicitly supported by the
1903 toolchain and since binutils 2.14 it does not even work at all.
1905 Say Y to use the 64-bit format or N to use the 32-bit one.
1910 bool "Include IRIX binary compatibility"
1911 depends on CPU_BIG_ENDIAN && 32BIT && BROKEN
1913 config MIPS32_COMPAT
1914 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
1917 Select this option if you want Linux/MIPS 32-bit binary
1918 compatibility. Since all software available for Linux/MIPS is
1919 currently 32-bit you should say Y here.
1923 depends on MIPS32_COMPAT
1926 config SYSVIPC_COMPAT
1928 depends on COMPAT && SYSVIPC
1932 bool "Kernel support for o32 binaries"
1933 depends on MIPS32_COMPAT
1935 Select this option if you want to run o32 binaries. These are pure
1936 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
1937 existing binaries are in this format.
1942 bool "Kernel support for n32 binaries"
1943 depends on MIPS32_COMPAT
1945 Select this option if you want to run n32 binaries. These are
1946 64-bit binaries using 32-bit quantities for addressing and certain
1947 data that would normally be 64-bit. They are used in special
1954 default y if MIPS32_O32 || MIPS32_N32
1958 menu "Power management options"
1960 source "kernel/power/Kconfig"
1964 source "net/Kconfig"
1966 source "drivers/Kconfig"
1970 source "arch/mips/oprofile/Kconfig"
1972 source "arch/mips/Kconfig.debug"
1974 source "security/Kconfig"
1976 source "crypto/Kconfig"
1978 source "lib/Kconfig"