4 # Horrible source of confusion. Die, die, die ...
7 mainmenu "Linux/MIPS Kernel Configuration"
9 menu "Machine selection"
19 bool "Lemote Fulong mini-PC"
20 select ARCH_SPARSEMEM_ENABLE
21 select SYS_HAS_CPU_LOONGSON2
22 select DMA_NONCOHERENT
25 select HAVE_STD_PC_SERIAL_PORT
30 select SYS_SUPPORTS_32BIT_KERNEL
31 select SYS_SUPPORTS_64BIT_KERNEL
32 select SYS_SUPPORTS_LITTLE_ENDIAN
33 select SYS_SUPPORTS_HIGHMEM
34 select SYS_HAS_EARLY_PRINTK
35 select GENERIC_HARDIRQS_NO__DO_IRQ
38 Lemote Fulong mini-PC board based on the Chinese Loongson-2E CPU and
42 bool "Alchemy processor based machines"
45 bool "Basler eXcite smart camera"
52 select SYS_HAS_CPU_RM9000
53 select SYS_SUPPORTS_32BIT_KERNEL
54 select SYS_SUPPORTS_64BIT_KERNEL
55 select SYS_SUPPORTS_BIG_ENDIAN
56 select SYS_SUPPORTS_KGDB
58 The eXcite is a smart camera platform manufactured by
59 Basler Vision Technologies AG.
61 config BASLER_EXCITE_PROTOTYPE
62 bool "Support for pre-release units"
63 depends on BASLER_EXCITE
66 Pre-series (prototype) units are different from later ones in
67 some ways. Select this option if you have one of these. Please
68 note that a kernel built with this option selected will not be
69 able to run on normal units.
73 select DMA_NONCOHERENT
77 select PCI_GT64XXX_PCI0
78 select SYS_HAS_CPU_NEVADA
79 select SYS_HAS_EARLY_PRINTK
80 select SYS_SUPPORTS_32BIT_KERNEL
81 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
82 select SYS_SUPPORTS_LITTLE_ENDIAN
83 select GENERIC_HARDIRQS_NO__DO_IRQ
85 config MACH_DECSTATION
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
119 select GENERIC_ISA_DMA
123 select SYS_HAS_CPU_R4X00
124 select SYS_SUPPORTS_32BIT_KERNEL
125 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
126 select SYS_SUPPORTS_100HZ
127 select GENERIC_HARDIRQS_NO__DO_IRQ
129 This a family of machines based on the MIPS R4030 chipset which was
130 used by several vendors to build RISC/os and Windows NT workstations.
131 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millenium and
132 Olivetti M700-10 workstations.
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 "Wind River PPMC board"
217 select DMA_NONCOHERENT
219 select PCI_GT64XXX_PCI0
221 select SYS_HAS_CPU_MIPS32_R1
222 select SYS_HAS_CPU_MIPS32_R2
223 select SYS_HAS_CPU_MIPS64_R1
224 select SYS_HAS_CPU_NEVADA
225 select SYS_HAS_CPU_RM7000
226 select SYS_SUPPORTS_32BIT_KERNEL
227 select SYS_SUPPORTS_64BIT_KERNEL
228 select SYS_SUPPORTS_BIG_ENDIAN
229 select SYS_SUPPORTS_LITTLE_ENDIAN
231 This enables support for the Wind River MIPS32 4KC PPMC evaluation
232 board, which is based on GT64120 bridge chip.
235 bool 'MIPS simulator (MIPSsim)'
236 select DMA_NONCOHERENT
237 select SYS_HAS_EARLY_PRINTK
240 select SYS_HAS_CPU_MIPS32_R1
241 select SYS_HAS_CPU_MIPS32_R2
242 select SYS_HAS_EARLY_PRINTK
243 select SYS_SUPPORTS_32BIT_KERNEL
244 select SYS_SUPPORTS_BIG_ENDIAN
245 select SYS_SUPPORTS_MULTITHREADING
246 select SYS_SUPPORTS_LITTLE_ENDIAN
248 This option enables support for MIPS Technologies MIPSsim software
251 config MOMENCO_OCELOT
252 bool "Momentum Ocelot board"
253 select DMA_NONCOHERENT
257 select PCI_GT64XXX_PCI0
258 select RM7000_CPU_SCACHE
260 select SYS_HAS_CPU_RM7000
261 select SYS_SUPPORTS_32BIT_KERNEL
262 select SYS_SUPPORTS_64BIT_KERNEL
263 select SYS_SUPPORTS_BIG_ENDIAN
264 select SYS_SUPPORTS_KGDB
266 The Ocelot is a MIPS-based Single Board Computer (SBC) made by
267 Momentum Computer <http://www.momenco.com/>.
270 bool "Philips PNX8550 based JBS board"
272 select SYS_SUPPORTS_LITTLE_ENDIAN
274 config PNX8550_STB810
275 bool "Philips PNX8550 based STB810 board"
277 select SYS_SUPPORTS_LITTLE_ENDIAN
280 bool "NEC DDB Vrc-5477"
281 select DDB5XXX_COMMON
282 select DMA_NONCOHERENT
286 select SYS_HAS_CPU_R5432
287 select SYS_SUPPORTS_32BIT_KERNEL
288 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
289 select SYS_SUPPORTS_KGDB
290 select SYS_SUPPORTS_KGDB
291 select SYS_SUPPORTS_LITTLE_ENDIAN
293 This enables support for the R5432-based NEC DDB Vrc-5477,
294 or Rockhopper/SolutionGear boards with R5432/R5500 CPUs.
296 Features : kernel debugging, serial terminal, NFS root fs, on-board
297 ether port USB, AC97, PCI, etc.
300 bool "NEC VR4100 series based machines"
301 select SYS_HAS_CPU_VR41XX
302 select GENERIC_HARDIRQS_NO__DO_IRQ
305 bool "PMC-Sierra MSP chipsets"
306 depends on EXPERIMENTAL
307 select DMA_NONCOHERENT
309 select NO_EXCEPT_FILL
311 select SYS_HAS_CPU_MIPS32_R1
312 select SYS_HAS_CPU_MIPS32_R2
313 select SYS_SUPPORTS_32BIT_KERNEL
314 select SYS_SUPPORTS_BIG_ENDIAN
315 select SYS_SUPPORTS_KGDB
318 select SERIAL_8250_CONSOLE
320 This adds support for the PMC-Sierra family of Multi-Service
321 Processor System-On-A-Chips. These parts include a number
322 of integrated peripherals, interfaces and DSPs in addition to
323 a variety of MIPS cores.
326 bool "PMC-Sierra Yosemite eval board"
333 select SYS_HAS_CPU_RM9000
334 select SYS_HAS_EARLY_PRINTK
335 select SYS_SUPPORTS_32BIT_KERNEL
336 select SYS_SUPPORTS_64BIT_KERNEL
337 select SYS_SUPPORTS_BIG_ENDIAN
338 select SYS_SUPPORTS_HIGHMEM
339 select SYS_SUPPORTS_KGDB
340 select SYS_SUPPORTS_SMP
342 Yosemite is an evaluation board for the RM9000x2 processor
343 manufactured by PMC-Sierra.
348 select GENERIC_ISA_DMA
349 select HAVE_STD_PC_SERIAL_PORT
354 select SYS_HAS_CPU_MIPS32_R1
355 select SYS_SUPPORTS_32BIT_KERNEL
356 select SYS_SUPPORTS_BIG_ENDIAN
357 select SYS_SUPPORTS_LITTLE_ENDIAN
358 select ARCH_SPARSEMEM_ENABLE
359 select GENERIC_HARDIRQS_NO__DO_IRQ
360 select NR_CPUS_DEFAULT_1
361 select SYS_SUPPORTS_SMP
363 Qemu is a software emulator which among other architectures also
364 can simulate a MIPS32 4Kc system. This patch adds support for the
365 system architecture that currently is being simulated by Qemu. It
366 will eventually be removed again when Qemu has the capability to
367 simulate actual MIPS hardware platforms. More information on Qemu
368 can be found at http://www.linux-mips.org/wiki/Qemu.
371 bool "NEC EMMA2RH Mark-eins"
372 select DMA_NONCOHERENT
376 select SYS_SUPPORTS_32BIT_KERNEL
377 select SYS_SUPPORTS_BIG_ENDIAN
378 select SYS_SUPPORTS_LITTLE_ENDIAN
379 select SYS_HAS_CPU_R5000
381 This enables support for the R5432-based NEC Mark-eins
382 boards with R5500 CPU.
385 bool "SGI IP22 (Indy/Indigo2)"
389 select DMA_NONCOHERENT
391 select IP22_CPU_SCACHE
393 select GENERIC_ISA_DMA_SUPPORT_BROKEN
395 select SYS_HAS_CPU_R4X00
396 select SYS_HAS_CPU_R5000
397 select SYS_HAS_EARLY_PRINTK
398 select SYS_SUPPORTS_32BIT_KERNEL
399 select SYS_SUPPORTS_64BIT_KERNEL
400 select SYS_SUPPORTS_BIG_ENDIAN
402 This are the SGI Indy, Challenge S and Indigo2, as well as certain
403 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
404 that runs on these, say Y here.
407 bool "SGI IP27 (Origin200/2000)"
412 select SYS_HAS_EARLY_PRINTK
414 select NR_CPUS_DEFAULT_64
416 select SYS_HAS_CPU_R10000
417 select SYS_SUPPORTS_64BIT_KERNEL
418 select SYS_SUPPORTS_BIG_ENDIAN
419 select SYS_SUPPORTS_KGDB
420 select SYS_SUPPORTS_NUMA
421 select SYS_SUPPORTS_SMP
422 select GENERIC_HARDIRQS_NO__DO_IRQ
424 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
425 workstations. To compile a Linux kernel that runs on these, say Y
433 select DMA_NONCOHERENT
435 select R5000_CPU_SCACHE
436 select RM7000_CPU_SCACHE
437 select SYS_HAS_CPU_R5000
438 select SYS_HAS_CPU_R10000 if BROKEN
439 select SYS_HAS_CPU_RM7000
440 select SYS_HAS_CPU_NEVADA
441 select SYS_SUPPORTS_64BIT_KERNEL
442 select SYS_SUPPORTS_BIG_ENDIAN
444 If you want this kernel to run on SGI O2 workstation, say Y here.
447 bool "Sibyte BCM91480B-BigSur"
450 select NR_CPUS_DEFAULT_4
452 select SIBYTE_BCM1x80
454 select SYS_HAS_CPU_SB1
455 select SYS_SUPPORTS_BIG_ENDIAN
456 select SYS_SUPPORTS_LITTLE_ENDIAN
459 bool "Sibyte BCM91250A-SWARM"
462 select NR_CPUS_DEFAULT_2
465 select SYS_HAS_CPU_SB1
466 select SYS_SUPPORTS_BIG_ENDIAN
467 select SYS_SUPPORTS_HIGHMEM
468 select SYS_SUPPORTS_KGDB
469 select SYS_SUPPORTS_LITTLE_ENDIAN
471 config SIBYTE_SENTOSA
472 bool "Sibyte BCM91250E-Sentosa"
473 depends on EXPERIMENTAL
476 select NR_CPUS_DEFAULT_2
479 select SYS_HAS_CPU_SB1
480 select SYS_SUPPORTS_BIG_ENDIAN
481 select SYS_SUPPORTS_LITTLE_ENDIAN
484 bool "Sibyte BCM91125E-Rhone"
485 depends on EXPERIMENTAL
488 select SIBYTE_BCM1125H
490 select SYS_HAS_CPU_SB1
491 select SYS_SUPPORTS_BIG_ENDIAN
492 select SYS_SUPPORTS_LITTLE_ENDIAN
495 bool "Sibyte BCM91120x-Carmel"
496 depends on EXPERIMENTAL
499 select SIBYTE_BCM1120
501 select SYS_HAS_CPU_SB1
502 select SYS_SUPPORTS_BIG_ENDIAN
503 select SYS_SUPPORTS_LITTLE_ENDIAN
505 config SIBYTE_PTSWARM
506 bool "Sibyte BCM91250PT-PTSWARM"
507 depends on EXPERIMENTAL
510 select NR_CPUS_DEFAULT_2
513 select SYS_HAS_CPU_SB1
514 select SYS_SUPPORTS_BIG_ENDIAN
515 select SYS_SUPPORTS_HIGHMEM
516 select SYS_SUPPORTS_LITTLE_ENDIAN
518 config SIBYTE_LITTLESUR
519 bool "Sibyte BCM91250C2-LittleSur"
520 depends on EXPERIMENTAL
523 select NR_CPUS_DEFAULT_2
526 select SYS_HAS_CPU_SB1
527 select SYS_SUPPORTS_BIG_ENDIAN
528 select SYS_SUPPORTS_HIGHMEM
529 select SYS_SUPPORTS_LITTLE_ENDIAN
532 bool "Sibyte BCM91120C-CRhine"
533 depends on EXPERIMENTAL
536 select SIBYTE_BCM1120
538 select SYS_HAS_CPU_SB1
539 select SYS_SUPPORTS_BIG_ENDIAN
540 select SYS_SUPPORTS_LITTLE_ENDIAN
543 bool "Sibyte BCM91125C-CRhone"
544 depends on EXPERIMENTAL
547 select SIBYTE_BCM1125
549 select SYS_HAS_CPU_SB1
550 select SYS_SUPPORTS_BIG_ENDIAN
551 select SYS_SUPPORTS_HIGHMEM
552 select SYS_SUPPORTS_LITTLE_ENDIAN
555 bool "SNI RM200/300/400"
556 select ARC if CPU_LITTLE_ENDIAN
557 select ARC32 if CPU_LITTLE_ENDIAN
558 select ARCH_MAY_HAVE_PC_FDC
560 select DMA_NONCOHERENT
561 select GENERIC_ISA_DMA
568 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
569 select SYS_HAS_CPU_R4X00
570 select SYS_HAS_CPU_R5000
571 select SYS_HAS_CPU_R10000
572 select R5000_CPU_SCACHE
573 select SYS_HAS_EARLY_PRINTK
574 select SYS_SUPPORTS_32BIT_KERNEL
575 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
576 select SYS_SUPPORTS_BIG_ENDIAN
577 select SYS_SUPPORTS_HIGHMEM
578 select SYS_SUPPORTS_LITTLE_ENDIAN
580 The SNI RM200/300/400 are MIPS-based machines manufactured by
581 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
582 Technology and now in turn merged with Fujitsu. Say Y here to
583 support this machine type.
585 config TOSHIBA_JMR3927
586 bool "Toshiba JMR-TX3927 board"
587 select DMA_NONCOHERENT
591 select SYS_HAS_CPU_TX39XX
592 select SYS_SUPPORTS_32BIT_KERNEL
593 select SYS_SUPPORTS_LITTLE_ENDIAN
594 select SYS_SUPPORTS_BIG_ENDIAN
595 select GENERIC_HARDIRQS_NO__DO_IRQ
597 config TOSHIBA_RBTX4927
598 bool "Toshiba TBTX49[23]7 board"
599 select DMA_NONCOHERENT
600 select HAS_TXX9_SERIAL
604 select SYS_HAS_CPU_TX49XX
605 select SYS_SUPPORTS_32BIT_KERNEL
606 select SYS_SUPPORTS_64BIT_KERNEL
607 select SYS_SUPPORTS_LITTLE_ENDIAN
608 select SYS_SUPPORTS_BIG_ENDIAN
609 select SYS_SUPPORTS_KGDB
610 select GENERIC_HARDIRQS_NO__DO_IRQ
612 This Toshiba board is based on the TX4927 processor. Say Y here to
613 support this machine type
615 config TOSHIBA_RBTX4938
616 bool "Toshiba RBTX4938 board"
617 select HAVE_STD_PC_SERIAL_PORT
618 select DMA_NONCOHERENT
619 select GENERIC_ISA_DMA
620 select HAS_TXX9_SERIAL
624 select SYS_HAS_CPU_TX49XX
625 select SYS_SUPPORTS_32BIT_KERNEL
626 select SYS_SUPPORTS_LITTLE_ENDIAN
627 select SYS_SUPPORTS_BIG_ENDIAN
628 select SYS_SUPPORTS_KGDB
629 select GENERIC_HARDIRQS_NO__DO_IRQ
632 This Toshiba board is based on the TX4938 processor. Say Y here to
633 support this machine type
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
1193 config WEAK_ORDERING
1198 # These two indicate any level of the MIPS32 and MIPS64 architecture
1202 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1206 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1209 # These two indicate the revision of the architecture, either Release 1 or Release 2
1213 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1217 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2
1219 config SYS_SUPPORTS_32BIT_KERNEL
1221 config SYS_SUPPORTS_64BIT_KERNEL
1223 config CPU_SUPPORTS_32BIT_KERNEL
1225 config CPU_SUPPORTS_64BIT_KERNEL
1232 prompt "Kernel code model"
1234 You should only select this option if you have a workload that
1235 actually benefits from 64-bit processing or if your machine has
1236 large memory. You will only be presented a single option in this
1237 menu if your system does not support both 32-bit and 64-bit kernels.
1240 bool "32-bit kernel"
1241 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1244 Select this option if you want to build a 32-bit kernel.
1246 bool "64-bit kernel"
1247 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1249 Select this option if you want to build a 64-bit kernel.
1254 prompt "Kernel page size"
1255 default PAGE_SIZE_4KB
1257 config PAGE_SIZE_4KB
1260 This option select the standard 4kB Linux page size. On some
1261 R3000-family processors this is the only available page size. Using
1262 4kB page size will minimize memory consumption and is therefore
1263 recommended for low memory systems.
1265 config PAGE_SIZE_8KB
1267 depends on EXPERIMENTAL && CPU_R8000
1269 Using 8kB page size will result in higher performance kernel at
1270 the price of higher memory consumption. This option is available
1271 only on the R8000 processor. Not that at the time of this writing
1272 this option is still high experimental; there are also issues with
1273 compatibility of user applications.
1275 config PAGE_SIZE_16KB
1277 depends on !CPU_R3000 && !CPU_TX39XX
1279 Using 16kB page size will result in higher performance kernel at
1280 the price of higher memory consumption. This option is available on
1281 all non-R3000 family processors. Note that you will need a suitable
1282 Linux distribution to support this.
1284 config PAGE_SIZE_64KB
1286 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1288 Using 64kB page size will result in higher performance kernel at
1289 the price of higher memory consumption. This option is available on
1290 all non-R3000 family processor. Not that at the time of this
1291 writing this option is still high experimental.
1298 config IP22_CPU_SCACHE
1303 # Support for a MIPS32 / MIPS64 style S-caches
1305 config MIPS_CPU_SCACHE
1309 config R5000_CPU_SCACHE
1313 config RM7000_CPU_SCACHE
1317 config SIBYTE_DMA_PAGEOPS
1318 bool "Use DMA to clear/copy pages"
1321 Instead of using the CPU to zero and copy pages, use a Data Mover
1322 channel. These DMA channels are otherwise unused by the standard
1323 SiByte Linux port. Seems to give a small performance benefit.
1325 config CPU_HAS_PREFETCH
1329 prompt "MIPS MT options"
1331 config MIPS_MT_DISABLED
1332 bool "Disable multithreading support."
1334 Use this option if your workload can't take advantage of
1335 MIPS hardware multithreading support. On systems that don't have
1336 the option of an MT-enabled processor this option will be the only
1337 option in this menu.
1340 bool "Use 1 TC on each available VPE for SMP"
1341 depends on SYS_SUPPORTS_MULTITHREADING
1342 select CPU_MIPSR2_IRQ_VI
1343 select CPU_MIPSR2_IRQ_EI
1344 select CPU_MIPSR2_SRS
1346 select NR_CPUS_DEFAULT_2
1348 select SYS_SUPPORTS_SMP
1350 This is a kernel model which is also known a VSMP or lately
1351 has been marketesed into SMVP.
1354 bool "SMTC: Use all TCs on all VPEs for SMP"
1355 depends on CPU_MIPS32_R2
1356 #depends on CPU_MIPS64_R2 # once there is hardware ...
1357 depends on SYS_SUPPORTS_MULTITHREADING
1358 select CPU_MIPSR2_IRQ_VI
1359 select CPU_MIPSR2_IRQ_EI
1360 select CPU_MIPSR2_SRS
1362 select NR_CPUS_DEFAULT_8
1364 select SYS_SUPPORTS_SMP
1366 This is a kernel model which is known a SMTC or lately has been
1367 marketesed into SMVP.
1369 config MIPS_VPE_LOADER
1370 bool "VPE loader support."
1371 depends on SYS_SUPPORTS_MULTITHREADING
1372 select CPU_MIPSR2_IRQ_VI
1373 select CPU_MIPSR2_IRQ_EI
1374 select CPU_MIPSR2_SRS
1377 Includes a loader for loading an elf relocatable object
1378 onto another VPE and running it.
1385 config SYS_SUPPORTS_MULTITHREADING
1388 config MIPS_MT_FPAFF
1389 bool "Dynamic FPU affinity for FP-intensive threads"
1393 config MIPS_MT_SMTC_INSTANT_REPLAY
1394 bool "Low-latency Dispatch of Deferred SMTC IPIs"
1395 depends on MIPS_MT_SMTC && !PREEMPT
1398 SMTC pseudo-interrupts between TCs are deferred and queued
1399 if the target TC is interrupt-inhibited (IXMT). In the first
1400 SMTC prototypes, these queued IPIs were serviced on return
1401 to user mode, or on entry into the kernel idle loop. The
1402 INSTANT_REPLAY option dispatches them as part of local_irq_restore()
1403 processing, which adds runtime overhead (hence the option to turn
1404 it off), but ensures that IPIs are handled promptly even under
1405 heavy I/O interrupt load.
1407 config MIPS_MT_SMTC_IM_BACKSTOP
1408 bool "Use per-TC register bits as backstop for inhibited IM bits"
1409 depends on MIPS_MT_SMTC
1412 To support multiple TC microthreads acting as "CPUs" within
1413 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1414 during interrupt handling. To support legacy drivers and interrupt
1415 controller management code, SMTC has a "backstop" to track and
1416 if necessary restore the interrupt mask. This has some performance
1417 impact on interrupt service overhead. Disable it only if you know
1420 config MIPS_VPE_LOADER_TOM
1421 bool "Load VPE program into memory hidden from linux"
1422 depends on MIPS_VPE_LOADER
1425 The loader can use memory that is present but has been hidden from
1426 Linux using the kernel command line option "mem=xxMB". It's up to
1427 you to ensure the amount you put in the option and the space your
1428 program requires is less or equal to the amount physically present.
1430 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1431 config MIPS_VPE_APSP_API
1432 bool "Enable support for AP/SP API (RTLX)"
1433 depends on MIPS_VPE_LOADER
1436 config MIPS_APSP_KSPD
1438 depends on MIPS_VPE_APSP_API
1441 KSPD is a kernel daemon that accepts syscall requests from the SP
1442 side, actions them and returns the results. It also handles the
1443 "exit" syscall notifying other kernel modules the SP program is
1444 exiting. You probably want to say yes here.
1446 config SB1_PASS_1_WORKAROUNDS
1448 depends on CPU_SB1_PASS_1
1451 config SB1_PASS_2_WORKAROUNDS
1453 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1456 config SB1_PASS_2_1_WORKAROUNDS
1458 depends on CPU_SB1 && CPU_SB1_PASS_2
1461 config 64BIT_PHYS_ADDR
1462 bool "Support for 64-bit physical address space"
1463 depends on (CPU_R4X00 || CPU_R5000 || CPU_RM7000 || CPU_RM9000 || CPU_R10000 || CPU_SB1 || CPU_MIPS32 || CPU_MIPS64) && 32BIT
1468 config CPU_HAS_SMARTMIPS
1469 depends on SYS_SUPPORTS_SMARTMIPS
1470 bool "Support for the SmartMIPS ASE"
1472 SmartMIPS is a extension of the MIPS32 architecture aimed at
1473 increased security at both hardware and software level for
1474 smartcards. Enabling this option will allow proper use of the
1475 SmartMIPS instructions by Linux applications. However a kernel with
1476 this option will not work on a MIPS core without SmartMIPS core. If
1477 you don't know you probably don't have SmartMIPS and should say N
1483 config 64BIT_CONTEXT
1484 bool "Save 64bit integer registers"
1485 depends on 32BIT && CPU_LOONGSON2
1487 Loongson2 CPU is 64bit , when used in 32BIT mode, its integer
1488 registers can still be accessed as 64bit, mainly for multimedia
1489 instructions. We must have all 64bit save/restored to make sure
1490 those instructions to get correct result.
1493 # Vectored interrupt mode is an R2 feature
1495 config CPU_MIPSR2_IRQ_VI
1499 # Extended interrupt mode is an R2 feature
1501 config CPU_MIPSR2_IRQ_EI
1505 # Shadow registers are an R2 feature
1507 config CPU_MIPSR2_SRS
1512 depends on !CPU_R3000
1516 # Use the generic interrupt handling code in kernel/irq/:
1518 config GENERIC_HARDIRQS
1522 config GENERIC_IRQ_PROBE
1530 # - Highmem only makes sense for the 32-bit kernel.
1531 # - The current highmem code will only work properly on physically indexed
1532 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1533 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1534 # moment we protect the user and offer the highmem option only on machines
1535 # where it's known to be safe. This will not offer highmem on a few systems
1536 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1537 # indexed CPUs but we're playing safe.
1538 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1539 # know they might have memory configurations that could make use of highmem
1543 bool "High Memory Support"
1544 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1546 config CPU_SUPPORTS_HIGHMEM
1549 config SYS_SUPPORTS_HIGHMEM
1552 config SYS_SUPPORTS_SMARTMIPS
1555 config ARCH_FLATMEM_ENABLE
1559 config ARCH_DISCONTIGMEM_ENABLE
1561 default y if SGI_IP27
1563 Say Y to support efficient handling of discontiguous physical memory,
1564 for architectures which are either NUMA (Non-Uniform Memory Access)
1565 or have huge holes in the physical address space for other reasons.
1566 See <file:Documentation/vm/numa> for more.
1568 config ARCH_SPARSEMEM_ENABLE
1570 select SPARSEMEM_STATIC
1574 depends on SYS_SUPPORTS_NUMA
1576 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1577 Access). This option improves performance on systems with more
1578 than two nodes; on two node systems it is generally better to
1579 leave it disabled; on single node systems disable this option
1582 config SYS_SUPPORTS_NUMA
1588 depends on NEED_MULTIPLE_NODES
1593 bool "Multi-Processing support"
1594 depends on SYS_SUPPORTS_SMP
1597 This enables support for systems with more than one CPU. If you have
1598 a system with only one CPU, like most personal computers, say N. If
1599 you have a system with more than one CPU, say Y.
1601 If you say N here, the kernel will run on single and multiprocessor
1602 machines, but will use only one CPU of a multiprocessor machine. If
1603 you say Y here, the kernel will run on many, but not all,
1604 singleprocessor machines. On a singleprocessor machine, the kernel
1605 will run faster if you say N here.
1607 People using multiprocessor machines who say Y here should also say
1608 Y to "Enhanced Real Time Clock Support", below.
1610 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
1611 available at <http://www.tldp.org/docs.html#howto>.
1613 If you don't know what to do here, say N.
1615 config SYS_SUPPORTS_SMP
1618 config NR_CPUS_DEFAULT_1
1621 config NR_CPUS_DEFAULT_2
1624 config NR_CPUS_DEFAULT_4
1627 config NR_CPUS_DEFAULT_8
1630 config NR_CPUS_DEFAULT_16
1633 config NR_CPUS_DEFAULT_32
1636 config NR_CPUS_DEFAULT_64
1640 int "Maximum number of CPUs (2-64)"
1641 range 1 64 if NR_CPUS_DEFAULT_1
1643 default "1" if NR_CPUS_DEFAULT_1
1644 default "2" if NR_CPUS_DEFAULT_2
1645 default "4" if NR_CPUS_DEFAULT_4
1646 default "8" if NR_CPUS_DEFAULT_8
1647 default "16" if NR_CPUS_DEFAULT_16
1648 default "32" if NR_CPUS_DEFAULT_32
1649 default "64" if NR_CPUS_DEFAULT_64
1651 This allows you to specify the maximum number of CPUs which this
1652 kernel will support. The maximum supported value is 32 for 32-bit
1653 kernel and 64 for 64-bit kernels; the minimum value which makes
1654 sense is 1 for Qemu (useful only for kernel debugging purposes)
1655 and 2 for all others.
1657 This is purely to save memory - each supported CPU adds
1658 approximately eight kilobytes to the kernel image. For best
1659 performance should round up your number of processors to the next
1663 # Timer Interrupt Frequency Configuration
1667 prompt "Timer frequency"
1670 Allows the configuration of the timer frequency.
1673 bool "48 HZ" if SYS_SUPPORTS_48HZ
1676 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1679 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1682 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1685 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1688 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1691 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1695 config SYS_SUPPORTS_48HZ
1698 config SYS_SUPPORTS_100HZ
1701 config SYS_SUPPORTS_128HZ
1704 config SYS_SUPPORTS_250HZ
1707 config SYS_SUPPORTS_256HZ
1710 config SYS_SUPPORTS_1000HZ
1713 config SYS_SUPPORTS_1024HZ
1716 config SYS_SUPPORTS_ARBIT_HZ
1718 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1719 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1720 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1721 !SYS_SUPPORTS_1024HZ
1726 default 100 if HZ_100
1727 default 128 if HZ_128
1728 default 250 if HZ_250
1729 default 256 if HZ_256
1730 default 1000 if HZ_1000
1731 default 1024 if HZ_1024
1733 source "kernel/Kconfig.preempt"
1735 config MIPS_INSANE_LARGE
1736 bool "Support for large 64-bit configurations"
1737 depends on CPU_R10000 && 64BIT
1739 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1740 previous 64-bit processors which only supported 40 bit / 1TB. If you
1741 need processes of more than 1TB virtual address space, say Y here.
1742 This will result in additional memory usage, so it is not
1743 recommended for normal users.
1746 bool "Kexec system call (EXPERIMENTAL)"
1747 depends on EXPERIMENTAL
1749 kexec is a system call that implements the ability to shutdown your
1750 current kernel, and to start another kernel. It is like a reboot
1751 but it is independent of the system firmware. And like a reboot
1752 you can start any kernel with it, not just Linux.
1754 The name comes from the similiarity to the exec system call.
1756 It is an ongoing process to be certain the hardware in a machine
1757 is properly shutdown, so do not be surprised if this code does not
1758 initially work for you. It may help to enable device hotplugging
1759 support. As of this writing the exact hardware interface is
1760 strongly in flux, so no good recommendation can be made.
1763 bool "Enable seccomp to safely compute untrusted bytecode"
1764 depends on PROC_FS && BROKEN
1767 This kernel feature is useful for number crunching applications
1768 that may need to compute untrusted bytecode during their
1769 execution. By using pipes or other transports made available to
1770 the process as file descriptors supporting the read/write
1771 syscalls, it's possible to isolate those applications in
1772 their own address space using seccomp. Once seccomp is
1773 enabled via /proc/<pid>/seccomp, it cannot be disabled
1774 and the task is only allowed to execute a few safe syscalls
1775 defined by each seccomp mode.
1777 If unsure, say Y. Only embedded should say N here.
1781 config RWSEM_GENERIC_SPINLOCK
1785 config LOCKDEP_SUPPORT
1789 config STACKTRACE_SUPPORT
1793 source "init/Kconfig"
1795 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1803 bool "Support for PCI controller"
1804 depends on HW_HAS_PCI
1806 Find out whether you have a PCI motherboard. PCI is the name of a
1807 bus system, i.e. the way the CPU talks to the other stuff inside
1808 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
1811 The PCI-HOWTO, available from
1812 <http://www.tldp.org/docs.html#howto>, contains valuable
1813 information about which PCI hardware does work under Linux and which
1820 source "drivers/pci/Kconfig"
1823 # ISA support is now enabled via select. Too many systems still have the one
1824 # or other ISA chip on the board that users don't know about so don't expect
1825 # users to choose the right thing ...
1832 depends on HW_HAS_EISA
1834 select GENERIC_ISA_DMA
1836 The Extended Industry Standard Architecture (EISA) bus was
1837 developed as an open alternative to the IBM MicroChannel bus.
1839 The EISA bus provided some of the features of the IBM MicroChannel
1840 bus while maintaining backward compatibility with cards made for
1841 the older ISA bus. The EISA bus saw limited use between 1988 and
1842 1995 when it was made obsolete by the PCI bus.
1844 Say Y here if you are building a kernel for an EISA-based machine.
1848 source "drivers/eisa/Kconfig"
1851 bool "TURBOchannel support"
1852 depends on MACH_DECSTATION
1854 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
1855 processors. Documentation on writing device drivers for TurboChannel
1857 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
1860 # bool "Access.Bus support"
1870 source "drivers/pcmcia/Kconfig"
1872 source "drivers/pci/hotplug/Kconfig"
1876 menu "Executable file formats"
1878 source "fs/Kconfig.binfmt"
1884 bool "Use 64-bit ELF format for building"
1887 A 64-bit kernel is usually built using the 64-bit ELF binary object
1888 format as it's one that allows arbitrary 64-bit constructs. For
1889 kernels that are loaded within the KSEG compatibility segments the
1890 32-bit ELF format can optionally be used resulting in a somewhat
1891 smaller binary, but this option is not explicitly supported by the
1892 toolchain and since binutils 2.14 it does not even work at all.
1894 Say Y to use the 64-bit format or N to use the 32-bit one.
1899 bool "Include IRIX binary compatibility"
1900 depends on CPU_BIG_ENDIAN && 32BIT && BROKEN
1902 config MIPS32_COMPAT
1903 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
1906 Select this option if you want Linux/MIPS 32-bit binary
1907 compatibility. Since all software available for Linux/MIPS is
1908 currently 32-bit you should say Y here.
1912 depends on MIPS32_COMPAT
1915 config SYSVIPC_COMPAT
1917 depends on COMPAT && SYSVIPC
1921 bool "Kernel support for o32 binaries"
1922 depends on MIPS32_COMPAT
1924 Select this option if you want to run o32 binaries. These are pure
1925 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
1926 existing binaries are in this format.
1931 bool "Kernel support for n32 binaries"
1932 depends on MIPS32_COMPAT
1934 Select this option if you want to run n32 binaries. These are
1935 64-bit binaries using 32-bit quantities for addressing and certain
1936 data that would normally be 64-bit. They are used in special
1943 default y if MIPS32_O32 || MIPS32_N32
1947 menu "Power management options"
1949 source "kernel/power/Kconfig"
1953 source "net/Kconfig"
1955 source "drivers/Kconfig"
1959 source "arch/mips/oprofile/Kconfig"
1961 source "arch/mips/Kconfig.debug"
1963 source "security/Kconfig"
1965 source "crypto/Kconfig"
1967 source "lib/Kconfig"