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_BIG_ENDIAN
32 select SYS_SUPPORTS_KGDB
34 The eXcite is a smart camera platform manufactured by
35 Basler Vision Technologies AG.
37 config BASLER_EXCITE_PROTOTYPE
38 bool "Support for pre-release units"
39 depends on BASLER_EXCITE
42 Pre-series (prototype) units are different from later ones in
43 some ways. Select this option if you have one of these. Please
44 note that a kernel built with this option selected will not be
45 able to run on normal units.
48 bool "BCM47XX based boards"
49 select DMA_NONCOHERENT
52 select SYS_HAS_CPU_MIPS32_R1
53 select SYS_SUPPORTS_32BIT_KERNEL
54 select SYS_SUPPORTS_LITTLE_ENDIAN
56 select SSB_DRIVER_MIPS
59 Support for BCM47XX based boards
63 select DMA_NONCOHERENT
67 select PCI_GT64XXX_PCI0
68 select SYS_HAS_CPU_NEVADA
69 select SYS_HAS_EARLY_PRINTK
70 select SYS_SUPPORTS_32BIT_KERNEL
71 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
72 select SYS_SUPPORTS_LITTLE_ENDIAN
73 select GENERIC_HARDIRQS_NO__DO_IRQ
75 config MACH_DECSTATION
78 select DMA_NONCOHERENT
81 select SYS_HAS_CPU_R3000
82 select SYS_HAS_CPU_R4X00
83 select SYS_SUPPORTS_32BIT_KERNEL
84 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
85 select SYS_SUPPORTS_LITTLE_ENDIAN
86 select SYS_SUPPORTS_128HZ
87 select SYS_SUPPORTS_256HZ
88 select SYS_SUPPORTS_1024HZ
90 This enables support for DEC's MIPS based workstations. For details
91 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
92 DECstation porting pages on <http://decstation.unix-ag.org/>.
94 If you have one of the following DECstation Models you definitely
95 want to choose R4xx0 for the CPU Type:
102 otherwise choose R3000.
105 bool "Jazz family of machines"
108 select ARCH_MAY_HAVE_PC_FDC
109 select GENERIC_ISA_DMA
114 select SYS_HAS_CPU_R4X00
115 select SYS_SUPPORTS_32BIT_KERNEL
116 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
117 select SYS_SUPPORTS_100HZ
118 select GENERIC_HARDIRQS_NO__DO_IRQ
120 This a family of machines based on the MIPS R4030 chipset which was
121 used by several vendors to build RISC/os and Windows NT workstations.
122 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millenium and
123 Olivetti M700-10 workstations.
126 bool "LASAT Networks platforms"
127 select DMA_NONCOHERENT
128 select SYS_HAS_EARLY_PRINTK
130 select PCI_GT64XXX_PCI0
132 select R5000_CPU_SCACHE
133 select SYS_HAS_CPU_R5000
134 select SYS_SUPPORTS_32BIT_KERNEL
135 select SYS_SUPPORTS_64BIT_KERNEL if BROKEN
136 select SYS_SUPPORTS_LITTLE_ENDIAN
137 select GENERIC_HARDIRQS_NO__DO_IRQ
140 bool "Lemote Fulong mini-PC"
141 select ARCH_SPARSEMEM_ENABLE
142 select SYS_HAS_CPU_LOONGSON2
143 select DMA_NONCOHERENT
146 select HAVE_STD_PC_SERIAL_PORT
151 select SYS_SUPPORTS_32BIT_KERNEL
152 select SYS_SUPPORTS_64BIT_KERNEL
153 select SYS_SUPPORTS_LITTLE_ENDIAN
154 select SYS_SUPPORTS_HIGHMEM
155 select SYS_HAS_EARLY_PRINTK
156 select GENERIC_HARDIRQS_NO__DO_IRQ
157 select GENERIC_ISA_DMA_SUPPORT_BROKEN
160 Lemote Fulong mini-PC board based on the Chinese Loongson-2E CPU and
164 bool "MIPS Atlas board"
166 select DMA_NONCOHERENT
167 select SYS_HAS_EARLY_PRINTK
170 select MIPS_BOARDS_GEN
172 select PCI_GT64XXX_PCI0
174 select RM7000_CPU_SCACHE
176 select SYS_HAS_CPU_MIPS32_R1
177 select SYS_HAS_CPU_MIPS32_R2
178 select SYS_HAS_CPU_MIPS64_R1
179 select SYS_HAS_CPU_NEVADA
180 select SYS_HAS_CPU_RM7000
181 select SYS_SUPPORTS_32BIT_KERNEL
182 select SYS_SUPPORTS_64BIT_KERNEL
183 select SYS_SUPPORTS_BIG_ENDIAN
184 select SYS_SUPPORTS_LITTLE_ENDIAN
185 select SYS_SUPPORTS_MULTITHREADING if EXPERIMENTAL
186 select SYS_SUPPORTS_SMARTMIPS
187 select GENERIC_HARDIRQS_NO__DO_IRQ
189 This enables support for the MIPS Technologies Atlas evaluation
193 bool "MIPS Malta board"
194 select ARCH_MAY_HAVE_PC_FDC
196 select DMA_NONCOHERENT
197 select GENERIC_ISA_DMA
201 select MIPS_BOARDS_GEN
203 select MIPS_CPU_SCACHE
204 select PCI_GT64XXX_PCI0
207 select SYS_HAS_CPU_MIPS32_R1
208 select SYS_HAS_CPU_MIPS32_R2
209 select SYS_HAS_CPU_MIPS64_R1
210 select SYS_HAS_CPU_NEVADA
211 select SYS_HAS_CPU_RM7000
212 select SYS_HAS_EARLY_PRINTK
213 select SYS_SUPPORTS_32BIT_KERNEL
214 select SYS_SUPPORTS_64BIT_KERNEL
215 select SYS_SUPPORTS_BIG_ENDIAN
216 select SYS_SUPPORTS_LITTLE_ENDIAN
217 select SYS_SUPPORTS_MULTITHREADING
218 select SYS_SUPPORTS_SMARTMIPS
220 This enables support for the MIPS Technologies Malta evaluation
224 bool "MIPS SEAD board"
226 select DMA_NONCOHERENT
227 select SYS_HAS_EARLY_PRINTK
228 select MIPS_BOARDS_GEN
229 select SYS_HAS_CPU_MIPS32_R1
230 select SYS_HAS_CPU_MIPS32_R2
231 select SYS_HAS_CPU_MIPS64_R1
232 select SYS_SUPPORTS_32BIT_KERNEL
233 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
234 select SYS_SUPPORTS_BIG_ENDIAN
235 select SYS_SUPPORTS_LITTLE_ENDIAN
236 select SYS_SUPPORTS_SMARTMIPS
238 This enables support for the MIPS Technologies SEAD evaluation
242 bool 'MIPS simulator (MIPSsim)'
243 select DMA_NONCOHERENT
244 select SYS_HAS_EARLY_PRINTK
247 select SYS_HAS_CPU_MIPS32_R1
248 select SYS_HAS_CPU_MIPS32_R2
249 select SYS_HAS_EARLY_PRINTK
250 select SYS_SUPPORTS_32BIT_KERNEL
251 select SYS_SUPPORTS_BIG_ENDIAN
252 select SYS_SUPPORTS_MULTITHREADING
253 select SYS_SUPPORTS_LITTLE_ENDIAN
255 This option enables support for MIPS Technologies MIPSsim software
259 bool "NEC EMMA2RH Mark-eins"
260 select DMA_NONCOHERENT
264 select SYS_SUPPORTS_32BIT_KERNEL
265 select SYS_SUPPORTS_BIG_ENDIAN
266 select SYS_SUPPORTS_LITTLE_ENDIAN
267 select SYS_HAS_CPU_R5000
269 This enables support for the R5432-based NEC Mark-eins
270 boards with R5500 CPU.
273 bool "NEC VR4100 series based machines"
274 select SYS_HAS_CPU_VR41XX
275 select GENERIC_HARDIRQS_NO__DO_IRQ
278 bool "Philips PNX8550 based JBS board"
280 select SYS_SUPPORTS_LITTLE_ENDIAN
282 config PNX8550_STB810
283 bool "Philips PNX8550 based STB810 board"
285 select SYS_SUPPORTS_LITTLE_ENDIAN
288 bool "PMC-Sierra MSP chipsets"
289 depends on EXPERIMENTAL
290 select DMA_NONCOHERENT
292 select NO_EXCEPT_FILL
294 select SYS_HAS_CPU_MIPS32_R1
295 select SYS_HAS_CPU_MIPS32_R2
296 select SYS_SUPPORTS_32BIT_KERNEL
297 select SYS_SUPPORTS_BIG_ENDIAN
298 select SYS_SUPPORTS_KGDB
301 select SERIAL_8250_CONSOLE
303 This adds support for the PMC-Sierra family of Multi-Service
304 Processor System-On-A-Chips. These parts include a number
305 of integrated peripherals, interfaces and DSPs in addition to
306 a variety of MIPS cores.
309 bool "PMC-Sierra Yosemite eval board"
316 select SYS_HAS_CPU_RM9000
317 select SYS_HAS_EARLY_PRINTK
318 select SYS_SUPPORTS_32BIT_KERNEL
319 select SYS_SUPPORTS_64BIT_KERNEL
320 select SYS_SUPPORTS_BIG_ENDIAN
321 select SYS_SUPPORTS_HIGHMEM
322 select SYS_SUPPORTS_KGDB
323 select SYS_SUPPORTS_SMP
325 Yosemite is an evaluation board for the RM9000x2 processor
326 manufactured by PMC-Sierra.
331 select GENERIC_ISA_DMA
332 select HAVE_STD_PC_SERIAL_PORT
337 select SYS_HAS_CPU_MIPS32_R1
338 select SYS_SUPPORTS_32BIT_KERNEL
339 select SYS_SUPPORTS_BIG_ENDIAN
340 select SYS_SUPPORTS_LITTLE_ENDIAN
341 select ARCH_SPARSEMEM_ENABLE
342 select GENERIC_HARDIRQS_NO__DO_IRQ
343 select NR_CPUS_DEFAULT_1
344 select SYS_SUPPORTS_SMP
346 Qemu is a software emulator which among other architectures also
347 can simulate a MIPS32 4Kc system. This patch adds support for the
348 system architecture that currently is being simulated by Qemu. It
349 will eventually be removed again when Qemu has the capability to
350 simulate actual MIPS hardware platforms. More information on Qemu
351 can be found at http://www.linux-mips.org/wiki/Qemu.
354 bool "SGI IP22 (Indy/Indigo2)"
358 select DMA_NONCOHERENT
360 select IP22_CPU_SCACHE
362 select GENERIC_ISA_DMA_SUPPORT_BROKEN
364 select SYS_HAS_CPU_R4X00
365 select SYS_HAS_CPU_R5000
366 select SYS_HAS_EARLY_PRINTK
367 select SYS_SUPPORTS_32BIT_KERNEL
368 select SYS_SUPPORTS_64BIT_KERNEL
369 select SYS_SUPPORTS_BIG_ENDIAN
371 This are the SGI Indy, Challenge S and Indigo2, as well as certain
372 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
373 that runs on these, say Y here.
376 bool "SGI IP27 (Origin200/2000)"
381 select SYS_HAS_EARLY_PRINTK
383 select NR_CPUS_DEFAULT_64
385 select SYS_HAS_CPU_R10000
386 select SYS_SUPPORTS_64BIT_KERNEL
387 select SYS_SUPPORTS_BIG_ENDIAN
388 select SYS_SUPPORTS_KGDB
389 select SYS_SUPPORTS_NUMA
390 select SYS_SUPPORTS_SMP
391 select GENERIC_HARDIRQS_NO__DO_IRQ
393 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
394 workstations. To compile a Linux kernel that runs on these, say Y
402 select DMA_NONCOHERENT
404 select R5000_CPU_SCACHE
405 select RM7000_CPU_SCACHE
406 select SYS_HAS_CPU_R5000
407 select SYS_HAS_CPU_R10000 if BROKEN
408 select SYS_HAS_CPU_RM7000
409 select SYS_HAS_CPU_NEVADA
410 select SYS_SUPPORTS_64BIT_KERNEL
411 select SYS_SUPPORTS_BIG_ENDIAN
413 If you want this kernel to run on SGI O2 workstation, say Y here.
416 bool "Sibyte BCM91120C-CRhine"
417 depends on EXPERIMENTAL
420 select SIBYTE_BCM1120
422 select SYS_HAS_CPU_SB1
423 select SYS_SUPPORTS_BIG_ENDIAN
424 select SYS_SUPPORTS_LITTLE_ENDIAN
427 bool "Sibyte BCM91120x-Carmel"
428 depends on EXPERIMENTAL
431 select SIBYTE_BCM1120
433 select SYS_HAS_CPU_SB1
434 select SYS_SUPPORTS_BIG_ENDIAN
435 select SYS_SUPPORTS_LITTLE_ENDIAN
438 bool "Sibyte BCM91125C-CRhone"
439 depends on EXPERIMENTAL
442 select SIBYTE_BCM1125
444 select SYS_HAS_CPU_SB1
445 select SYS_SUPPORTS_BIG_ENDIAN
446 select SYS_SUPPORTS_HIGHMEM
447 select SYS_SUPPORTS_LITTLE_ENDIAN
450 bool "Sibyte BCM91125E-Rhone"
451 depends on EXPERIMENTAL
454 select SIBYTE_BCM1125H
456 select SYS_HAS_CPU_SB1
457 select SYS_SUPPORTS_BIG_ENDIAN
458 select SYS_SUPPORTS_LITTLE_ENDIAN
461 bool "Sibyte BCM91250A-SWARM"
464 select NR_CPUS_DEFAULT_2
467 select SYS_HAS_CPU_SB1
468 select SYS_SUPPORTS_BIG_ENDIAN
469 select SYS_SUPPORTS_HIGHMEM
470 select SYS_SUPPORTS_KGDB
471 select SYS_SUPPORTS_LITTLE_ENDIAN
473 config SIBYTE_LITTLESUR
474 bool "Sibyte BCM91250C2-LittleSur"
475 depends on EXPERIMENTAL
478 select NR_CPUS_DEFAULT_2
481 select SYS_HAS_CPU_SB1
482 select SYS_SUPPORTS_BIG_ENDIAN
483 select SYS_SUPPORTS_HIGHMEM
484 select SYS_SUPPORTS_LITTLE_ENDIAN
486 config SIBYTE_SENTOSA
487 bool "Sibyte BCM91250E-Sentosa"
488 depends on EXPERIMENTAL
491 select NR_CPUS_DEFAULT_2
494 select SYS_HAS_CPU_SB1
495 select SYS_SUPPORTS_BIG_ENDIAN
496 select SYS_SUPPORTS_LITTLE_ENDIAN
498 config SIBYTE_PTSWARM
499 bool "Sibyte BCM91250PT-PTSWARM"
500 depends on EXPERIMENTAL
503 select NR_CPUS_DEFAULT_2
506 select SYS_HAS_CPU_SB1
507 select SYS_SUPPORTS_BIG_ENDIAN
508 select SYS_SUPPORTS_HIGHMEM
509 select SYS_SUPPORTS_LITTLE_ENDIAN
512 bool "Sibyte BCM91480B-BigSur"
515 select NR_CPUS_DEFAULT_4
517 select SIBYTE_BCM1x80
519 select SYS_HAS_CPU_SB1
520 select SYS_SUPPORTS_BIG_ENDIAN
521 select SYS_SUPPORTS_LITTLE_ENDIAN
524 bool "SNI RM200/300/400"
525 select ARC if CPU_LITTLE_ENDIAN
526 select ARC32 if CPU_LITTLE_ENDIAN
527 select ARCH_MAY_HAVE_PC_FDC
529 select DMA_NONCOHERENT
530 select GENERIC_ISA_DMA
537 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
538 select SYS_HAS_CPU_R4X00
539 select SYS_HAS_CPU_R5000
540 select SYS_HAS_CPU_R10000
541 select R5000_CPU_SCACHE
542 select SYS_HAS_EARLY_PRINTK
543 select SYS_SUPPORTS_32BIT_KERNEL
544 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
545 select SYS_SUPPORTS_BIG_ENDIAN
546 select SYS_SUPPORTS_HIGHMEM
547 select SYS_SUPPORTS_LITTLE_ENDIAN
549 The SNI RM200/300/400 are MIPS-based machines manufactured by
550 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
551 Technology and now in turn merged with Fujitsu. Say Y here to
552 support this machine type.
554 config TOSHIBA_JMR3927
555 bool "Toshiba JMR-TX3927 board"
556 select DMA_NONCOHERENT
561 select SYS_HAS_CPU_TX39XX
562 select SYS_SUPPORTS_32BIT_KERNEL
563 select SYS_SUPPORTS_LITTLE_ENDIAN
564 select SYS_SUPPORTS_BIG_ENDIAN
565 select GENERIC_HARDIRQS_NO__DO_IRQ
567 config TOSHIBA_RBTX4927
568 bool "Toshiba RBTX49[23]7 board"
569 select DMA_NONCOHERENT
570 select HAS_TXX9_SERIAL
574 select I8259 if TOSHIBA_FPCIB0
576 select SYS_HAS_CPU_TX49XX
577 select SYS_SUPPORTS_32BIT_KERNEL
578 select SYS_SUPPORTS_64BIT_KERNEL
579 select SYS_SUPPORTS_LITTLE_ENDIAN
580 select SYS_SUPPORTS_BIG_ENDIAN
581 select SYS_SUPPORTS_KGDB
582 select GENERIC_HARDIRQS_NO__DO_IRQ
584 This Toshiba board is based on the TX4927 processor. Say Y here to
585 support this machine type
587 config TOSHIBA_RBTX4938
588 bool "Toshiba RBTX4938 board"
589 select DMA_NONCOHERENT
590 select HAS_TXX9_SERIAL
595 select SYS_HAS_CPU_TX49XX
596 select SYS_SUPPORTS_32BIT_KERNEL
597 select SYS_SUPPORTS_LITTLE_ENDIAN
598 select SYS_SUPPORTS_BIG_ENDIAN
599 select SYS_SUPPORTS_KGDB
600 select GENERIC_HARDIRQS_NO__DO_IRQ
603 This Toshiba board is based on the TX4938 processor. Say Y here to
604 support this machine type
607 bool "Wind River PPMC board"
610 select DMA_NONCOHERENT
612 select PCI_GT64XXX_PCI0
614 select SYS_HAS_CPU_MIPS32_R1
615 select SYS_HAS_CPU_MIPS32_R2
616 select SYS_HAS_CPU_MIPS64_R1
617 select SYS_HAS_CPU_NEVADA
618 select SYS_HAS_CPU_RM7000
619 select SYS_SUPPORTS_32BIT_KERNEL
620 select SYS_SUPPORTS_64BIT_KERNEL
621 select SYS_SUPPORTS_BIG_ENDIAN
622 select SYS_SUPPORTS_LITTLE_ENDIAN
624 This enables support for the Wind River MIPS32 4KC PPMC evaluation
625 board, which is based on GT64120 bridge chip.
629 source "arch/mips/au1000/Kconfig"
630 source "arch/mips/jazz/Kconfig"
631 source "arch/mips/lasat/Kconfig"
632 source "arch/mips/pmc-sierra/Kconfig"
633 source "arch/mips/sgi-ip27/Kconfig"
634 source "arch/mips/sibyte/Kconfig"
635 source "arch/mips/tx4927/Kconfig"
636 source "arch/mips/tx4938/Kconfig"
637 source "arch/mips/vr41xx/Kconfig"
641 config RWSEM_GENERIC_SPINLOCK
645 config RWSEM_XCHGADD_ALGORITHM
648 config ARCH_HAS_ILOG2_U32
652 config ARCH_HAS_ILOG2_U64
656 config GENERIC_FIND_NEXT_BIT
660 config GENERIC_HWEIGHT
664 config GENERIC_CALIBRATE_DELAY
672 config SCHED_NO_NO_OMIT_FRAME_POINTER
676 config GENERIC_HARDIRQS_NO__DO_IRQ
681 # Select some configuration options automatically based on user selections.
686 config ARCH_MAY_HAVE_PC_FDC
700 select DMA_NEED_PCI_MAP_STATE
702 config DMA_NONCOHERENT
704 select DMA_NEED_PCI_MAP_STATE
706 config DMA_NEED_PCI_MAP_STATE
710 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
711 depends on SYS_HAS_EARLY_PRINTK
714 This option enables special console drivers which allow the kernel
715 to print messages very early in the bootup process.
717 This is useful for kernel debugging when your machine crashes very
718 early before the console code is initialized. For normal operation,
719 it is not recommended because it looks ugly on some machines and
720 doesn't cooperate with an X server. You should normally say N here,
721 unless you want to debug such a crash.
723 config SYS_HAS_EARLY_PRINTK
742 config MIPS_DISABLE_OBSOLETE_IDE
748 config GENERIC_ISA_DMA
750 select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
752 config GENERIC_ISA_DMA_SUPPORT_BROKEN
754 select GENERIC_ISA_DMA
760 # Endianess selection. Sufficiently obscure so many users don't know what to
761 # answer,so we try hard to limit the available choices. Also the use of a
762 # choice statement should be more obvious to the user.
765 prompt "Endianess selection"
767 Some MIPS machines can be configured for either little or big endian
768 byte order. These modes require different kernels and a different
769 Linux distribution. In general there is one preferred byteorder for a
770 particular system but some systems are just as commonly used in the
771 one or the other endianness.
773 config CPU_BIG_ENDIAN
775 depends on SYS_SUPPORTS_BIG_ENDIAN
777 config CPU_LITTLE_ENDIAN
779 depends on SYS_SUPPORTS_LITTLE_ENDIAN
784 config SYS_SUPPORTS_APM_EMULATION
787 config SYS_SUPPORTS_BIG_ENDIAN
790 config SYS_SUPPORTS_LITTLE_ENDIAN
811 config MIPS_BOARDS_GEN
814 config PCI_GT64XXX_PCI0
817 config NO_EXCEPT_FILL
822 select HAS_TXX9_SERIAL
834 select DMA_NONCOHERENT
836 select SYS_HAS_CPU_MIPS32_R1
837 select SYS_HAS_EARLY_PRINTK
838 select SYS_SUPPORTS_32BIT_KERNEL
839 select GENERIC_HARDIRQS_NO__DO_IRQ
840 select SYS_SUPPORTS_KGDB
860 config MIPS_L1_CACHE_SHIFT
862 default "4" if MACH_DECSTATION
863 default "7" if SGI_IP27 || SNI_RM
864 default "4" if PMC_MSP4200_EVAL
867 config HAVE_STD_PC_SERIAL_PORT
871 bool "ARC console support"
872 depends on SGI_IP22 || (SNI_RM && CPU_LITTLE_ENDIAN)
876 depends on MACH_JAZZ || SNI_RM || SGI_IP32
881 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP32
898 depends on SYS_HAS_CPU_LOONGSON2
899 select CPU_SUPPORTS_32BIT_KERNEL
900 select CPU_SUPPORTS_64BIT_KERNEL
901 select CPU_SUPPORTS_HIGHMEM
903 The Loongson 2E processor implements the MIPS III instruction set
904 with many extensions.
907 bool "MIPS32 Release 1"
908 depends on SYS_HAS_CPU_MIPS32_R1
910 select CPU_HAS_PREFETCH
911 select CPU_SUPPORTS_32BIT_KERNEL
912 select CPU_SUPPORTS_HIGHMEM
914 Choose this option to build a kernel for release 1 or later of the
915 MIPS32 architecture. Most modern embedded systems with a 32-bit
916 MIPS processor are based on a MIPS32 processor. If you know the
917 specific type of processor in your system, choose those that one
918 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
919 Release 2 of the MIPS32 architecture is available since several
920 years so chances are you even have a MIPS32 Release 2 processor
921 in which case you should choose CPU_MIPS32_R2 instead for better
925 bool "MIPS32 Release 2"
926 depends on SYS_HAS_CPU_MIPS32_R2
928 select CPU_HAS_PREFETCH
929 select CPU_SUPPORTS_32BIT_KERNEL
930 select CPU_SUPPORTS_HIGHMEM
932 Choose this option to build a kernel for release 2 or later of the
933 MIPS32 architecture. Most modern embedded systems with a 32-bit
934 MIPS processor are based on a MIPS32 processor. If you know the
935 specific type of processor in your system, choose those that one
936 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
939 bool "MIPS64 Release 1"
940 depends on SYS_HAS_CPU_MIPS64_R1
942 select CPU_HAS_PREFETCH
943 select CPU_SUPPORTS_32BIT_KERNEL
944 select CPU_SUPPORTS_64BIT_KERNEL
945 select CPU_SUPPORTS_HIGHMEM
947 Choose this option to build a kernel for release 1 or later of the
948 MIPS64 architecture. Many modern embedded systems with a 64-bit
949 MIPS processor are based on a MIPS64 processor. If you know the
950 specific type of processor in your system, choose those that one
951 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
952 Release 2 of the MIPS64 architecture is available since several
953 years so chances are you even have a MIPS64 Release 2 processor
954 in which case you should choose CPU_MIPS64_R2 instead for better
958 bool "MIPS64 Release 2"
959 depends on SYS_HAS_CPU_MIPS64_R2
961 select CPU_HAS_PREFETCH
962 select CPU_SUPPORTS_32BIT_KERNEL
963 select CPU_SUPPORTS_64BIT_KERNEL
964 select CPU_SUPPORTS_HIGHMEM
966 Choose this option to build a kernel for release 2 or later of the
967 MIPS64 architecture. Many modern embedded systems with a 64-bit
968 MIPS processor are based on a MIPS64 processor. If you know the
969 specific type of processor in your system, choose those that one
970 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
974 depends on SYS_HAS_CPU_R3000
976 select CPU_SUPPORTS_32BIT_KERNEL
977 select CPU_SUPPORTS_HIGHMEM
979 Please make sure to pick the right CPU type. Linux/MIPS is not
980 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
981 *not* work on R4000 machines and vice versa. However, since most
982 of the supported machines have an R4000 (or similar) CPU, R4x00
983 might be a safe bet. If the resulting kernel does not work,
984 try to recompile with R3000.
988 depends on SYS_HAS_CPU_TX39XX
989 select CPU_SUPPORTS_32BIT_KERNEL
993 depends on SYS_HAS_CPU_VR41XX
994 select CPU_SUPPORTS_32BIT_KERNEL
995 select CPU_SUPPORTS_64BIT_KERNEL
997 The options selects support for the NEC VR4100 series of processors.
998 Only choose this option if you have one of these processors as a
999 kernel built with this option will not run on any other type of
1000 processor or vice versa.
1004 depends on SYS_HAS_CPU_R4300
1006 select CPU_SUPPORTS_32BIT_KERNEL
1007 select CPU_SUPPORTS_64BIT_KERNEL
1009 MIPS Technologies R4300-series processors.
1013 depends on SYS_HAS_CPU_R4X00
1015 select CPU_SUPPORTS_32BIT_KERNEL
1016 select CPU_SUPPORTS_64BIT_KERNEL
1018 MIPS Technologies R4000-series processors other than 4300, including
1019 the R4000, R4400, R4600, and 4700.
1023 depends on SYS_HAS_CPU_TX49XX
1025 select CPU_HAS_PREFETCH
1026 select CPU_SUPPORTS_32BIT_KERNEL
1027 select CPU_SUPPORTS_64BIT_KERNEL
1031 depends on SYS_HAS_CPU_R5000
1033 select CPU_SUPPORTS_32BIT_KERNEL
1034 select CPU_SUPPORTS_64BIT_KERNEL
1036 MIPS Technologies R5000-series processors other than the Nevada.
1040 depends on SYS_HAS_CPU_R5432
1042 select CPU_SUPPORTS_32BIT_KERNEL
1043 select CPU_SUPPORTS_64BIT_KERNEL
1047 depends on EXPERIMENTAL
1049 depends on SYS_HAS_CPU_R6000
1050 select CPU_SUPPORTS_32BIT_KERNEL
1052 MIPS Technologies R6000 and R6000A series processors. Note these
1053 processors are extremely rare and the support for them is incomplete.
1057 depends on SYS_HAS_CPU_NEVADA
1059 select CPU_SUPPORTS_32BIT_KERNEL
1060 select CPU_SUPPORTS_64BIT_KERNEL
1062 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1066 depends on EXPERIMENTAL
1067 depends on SYS_HAS_CPU_R8000
1069 select CPU_HAS_PREFETCH
1070 select CPU_SUPPORTS_64BIT_KERNEL
1072 MIPS Technologies R8000 processors. Note these processors are
1073 uncommon and the support for them is incomplete.
1077 depends on SYS_HAS_CPU_R10000
1079 select CPU_HAS_PREFETCH
1080 select CPU_SUPPORTS_32BIT_KERNEL
1081 select CPU_SUPPORTS_64BIT_KERNEL
1082 select CPU_SUPPORTS_HIGHMEM
1084 MIPS Technologies R10000-series processors.
1088 depends on SYS_HAS_CPU_RM7000
1090 select CPU_HAS_PREFETCH
1091 select CPU_SUPPORTS_32BIT_KERNEL
1092 select CPU_SUPPORTS_64BIT_KERNEL
1093 select CPU_SUPPORTS_HIGHMEM
1097 depends on SYS_HAS_CPU_RM9000
1099 select CPU_HAS_PREFETCH
1100 select CPU_SUPPORTS_32BIT_KERNEL
1101 select CPU_SUPPORTS_64BIT_KERNEL
1102 select CPU_SUPPORTS_HIGHMEM
1103 select WEAK_ORDERING
1107 depends on SYS_HAS_CPU_SB1
1109 select CPU_SUPPORTS_32BIT_KERNEL
1110 select CPU_SUPPORTS_64BIT_KERNEL
1111 select CPU_SUPPORTS_HIGHMEM
1112 select WEAK_ORDERING
1116 config SYS_HAS_CPU_LOONGSON2
1119 config SYS_HAS_CPU_MIPS32_R1
1122 config SYS_HAS_CPU_MIPS32_R2
1125 config SYS_HAS_CPU_MIPS64_R1
1128 config SYS_HAS_CPU_MIPS64_R2
1131 config SYS_HAS_CPU_R3000
1134 config SYS_HAS_CPU_TX39XX
1137 config SYS_HAS_CPU_VR41XX
1140 config SYS_HAS_CPU_R4300
1143 config SYS_HAS_CPU_R4X00
1146 config SYS_HAS_CPU_TX49XX
1149 config SYS_HAS_CPU_R5000
1152 config SYS_HAS_CPU_R5432
1155 config SYS_HAS_CPU_R6000
1158 config SYS_HAS_CPU_NEVADA
1161 config SYS_HAS_CPU_R8000
1164 config SYS_HAS_CPU_R10000
1167 config SYS_HAS_CPU_RM7000
1170 config SYS_HAS_CPU_RM9000
1173 config SYS_HAS_CPU_SB1
1177 # CPU may reorder R->R, R->W, W->R, W->W
1178 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1180 config WEAK_ORDERING
1184 # CPU may reorder reads and writes beyond LL/SC
1185 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1187 config WEAK_REORDERING_BEYOND_LLSC
1192 # These two indicate any level of the MIPS32 and MIPS64 architecture
1196 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1200 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1203 # These two indicate the revision of the architecture, either Release 1 or Release 2
1207 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1211 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2
1213 config SYS_SUPPORTS_32BIT_KERNEL
1215 config SYS_SUPPORTS_64BIT_KERNEL
1217 config CPU_SUPPORTS_32BIT_KERNEL
1219 config CPU_SUPPORTS_64BIT_KERNEL
1226 prompt "Kernel code model"
1228 You should only select this option if you have a workload that
1229 actually benefits from 64-bit processing or if your machine has
1230 large memory. You will only be presented a single option in this
1231 menu if your system does not support both 32-bit and 64-bit kernels.
1234 bool "32-bit kernel"
1235 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1238 Select this option if you want to build a 32-bit kernel.
1240 bool "64-bit kernel"
1241 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1243 Select this option if you want to build a 64-bit kernel.
1248 prompt "Kernel page size"
1249 default PAGE_SIZE_4KB
1251 config PAGE_SIZE_4KB
1254 This option select the standard 4kB Linux page size. On some
1255 R3000-family processors this is the only available page size. Using
1256 4kB page size will minimize memory consumption and is therefore
1257 recommended for low memory systems.
1259 config PAGE_SIZE_8KB
1261 depends on EXPERIMENTAL && CPU_R8000
1263 Using 8kB page size will result in higher performance kernel at
1264 the price of higher memory consumption. This option is available
1265 only on the R8000 processor. Not that at the time of this writing
1266 this option is still high experimental; there are also issues with
1267 compatibility of user applications.
1269 config PAGE_SIZE_16KB
1271 depends on !CPU_R3000 && !CPU_TX39XX
1273 Using 16kB page size will result in higher performance kernel at
1274 the price of higher memory consumption. This option is available on
1275 all non-R3000 family processors. Note that you will need a suitable
1276 Linux distribution to support this.
1278 config PAGE_SIZE_64KB
1280 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1282 Using 64kB page size will result in higher performance kernel at
1283 the price of higher memory consumption. This option is available on
1284 all non-R3000 family processor. Not that at the time of this
1285 writing this option is still high experimental.
1292 config IP22_CPU_SCACHE
1297 # Support for a MIPS32 / MIPS64 style S-caches
1299 config MIPS_CPU_SCACHE
1303 config R5000_CPU_SCACHE
1307 config RM7000_CPU_SCACHE
1311 config SIBYTE_DMA_PAGEOPS
1312 bool "Use DMA to clear/copy pages"
1315 Instead of using the CPU to zero and copy pages, use a Data Mover
1316 channel. These DMA channels are otherwise unused by the standard
1317 SiByte Linux port. Seems to give a small performance benefit.
1319 config CPU_HAS_PREFETCH
1323 prompt "MIPS MT options"
1325 config MIPS_MT_DISABLED
1326 bool "Disable multithreading support."
1328 Use this option if your workload can't take advantage of
1329 MIPS hardware multithreading support. On systems that don't have
1330 the option of an MT-enabled processor this option will be the only
1331 option in this menu.
1334 bool "Use 1 TC on each available VPE for SMP"
1335 depends on SYS_SUPPORTS_MULTITHREADING
1336 select CPU_MIPSR2_IRQ_VI
1337 select CPU_MIPSR2_IRQ_EI
1338 select CPU_MIPSR2_SRS
1340 select NR_CPUS_DEFAULT_2
1342 select SYS_SUPPORTS_SMP
1344 This is a kernel model which is also known a VSMP or lately
1345 has been marketesed into SMVP.
1348 bool "SMTC: Use all TCs on all VPEs for SMP"
1349 depends on CPU_MIPS32_R2
1350 #depends on CPU_MIPS64_R2 # once there is hardware ...
1351 depends on SYS_SUPPORTS_MULTITHREADING
1352 select CPU_MIPSR2_IRQ_VI
1353 select CPU_MIPSR2_IRQ_EI
1354 select CPU_MIPSR2_SRS
1356 select NR_CPUS_DEFAULT_8
1358 select SYS_SUPPORTS_SMP
1360 This is a kernel model which is known a SMTC or lately has been
1361 marketesed into SMVP.
1368 config SYS_SUPPORTS_MULTITHREADING
1371 config MIPS_MT_FPAFF
1372 bool "Dynamic FPU affinity for FP-intensive threads"
1374 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1376 config MIPS_VPE_LOADER
1377 bool "VPE loader support."
1378 depends on SYS_SUPPORTS_MULTITHREADING
1379 select CPU_MIPSR2_IRQ_VI
1380 select CPU_MIPSR2_IRQ_EI
1381 select CPU_MIPSR2_SRS
1384 Includes a loader for loading an elf relocatable object
1385 onto another VPE and running it.
1387 config MIPS_MT_SMTC_INSTANT_REPLAY
1388 bool "Low-latency Dispatch of Deferred SMTC IPIs"
1389 depends on MIPS_MT_SMTC && !PREEMPT
1392 SMTC pseudo-interrupts between TCs are deferred and queued
1393 if the target TC is interrupt-inhibited (IXMT). In the first
1394 SMTC prototypes, these queued IPIs were serviced on return
1395 to user mode, or on entry into the kernel idle loop. The
1396 INSTANT_REPLAY option dispatches them as part of local_irq_restore()
1397 processing, which adds runtime overhead (hence the option to turn
1398 it off), but ensures that IPIs are handled promptly even under
1399 heavy I/O interrupt load.
1401 config MIPS_MT_SMTC_IM_BACKSTOP
1402 bool "Use per-TC register bits as backstop for inhibited IM bits"
1403 depends on MIPS_MT_SMTC
1406 To support multiple TC microthreads acting as "CPUs" within
1407 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1408 during interrupt handling. To support legacy drivers and interrupt
1409 controller management code, SMTC has a "backstop" to track and
1410 if necessary restore the interrupt mask. This has some performance
1411 impact on interrupt service overhead. Disable it only if you know
1414 config MIPS_MT_SMTC_IRQAFF
1415 bool "Support IRQ affinity API"
1416 depends on MIPS_MT_SMTC
1419 Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.)
1420 for SMTC Linux kernel. Requires platform support, of which
1421 an example can be found in the MIPS kernel i8259 and Malta
1422 platform code. It is recommended that MIPS_MT_SMTC_INSTANT_REPLAY
1423 be enabled if MIPS_MT_SMTC_IRQAFF is used. Adds overhead to
1424 interrupt dispatch, and should be used only if you know what
1427 config MIPS_VPE_LOADER_TOM
1428 bool "Load VPE program into memory hidden from linux"
1429 depends on MIPS_VPE_LOADER
1432 The loader can use memory that is present but has been hidden from
1433 Linux using the kernel command line option "mem=xxMB". It's up to
1434 you to ensure the amount you put in the option and the space your
1435 program requires is less or equal to the amount physically present.
1437 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1438 config MIPS_VPE_APSP_API
1439 bool "Enable support for AP/SP API (RTLX)"
1440 depends on MIPS_VPE_LOADER
1443 config MIPS_APSP_KSPD
1445 depends on MIPS_VPE_APSP_API
1448 KSPD is a kernel daemon that accepts syscall requests from the SP
1449 side, actions them and returns the results. It also handles the
1450 "exit" syscall notifying other kernel modules the SP program is
1451 exiting. You probably want to say yes here.
1453 config SB1_PASS_1_WORKAROUNDS
1455 depends on CPU_SB1_PASS_1
1458 config SB1_PASS_2_WORKAROUNDS
1460 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1463 config SB1_PASS_2_1_WORKAROUNDS
1465 depends on CPU_SB1 && CPU_SB1_PASS_2
1468 config 64BIT_PHYS_ADDR
1474 config CPU_HAS_SMARTMIPS
1475 depends on SYS_SUPPORTS_SMARTMIPS
1476 bool "Support for the SmartMIPS ASE"
1478 SmartMIPS is a extension of the MIPS32 architecture aimed at
1479 increased security at both hardware and software level for
1480 smartcards. Enabling this option will allow proper use of the
1481 SmartMIPS instructions by Linux applications. However a kernel with
1482 this option will not work on a MIPS core without SmartMIPS core. If
1483 you don't know you probably don't have SmartMIPS and should say N
1489 config 64BIT_CONTEXT
1490 bool "Save 64bit integer registers"
1491 depends on 32BIT && CPU_LOONGSON2
1493 Loongson2 CPU is 64bit , when used in 32BIT mode, its integer
1494 registers can still be accessed as 64bit, mainly for multimedia
1495 instructions. We must have all 64bit save/restored to make sure
1496 those instructions to get correct result.
1499 # Vectored interrupt mode is an R2 feature
1501 config CPU_MIPSR2_IRQ_VI
1505 # Extended interrupt mode is an R2 feature
1507 config CPU_MIPSR2_IRQ_EI
1511 # Shadow registers are an R2 feature
1513 config CPU_MIPSR2_SRS
1518 depends on !CPU_R3000
1522 # Use the generic interrupt handling code in kernel/irq/:
1524 config GENERIC_HARDIRQS
1528 config GENERIC_IRQ_PROBE
1536 # - Highmem only makes sense for the 32-bit kernel.
1537 # - The current highmem code will only work properly on physically indexed
1538 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1539 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1540 # moment we protect the user and offer the highmem option only on machines
1541 # where it's known to be safe. This will not offer highmem on a few systems
1542 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1543 # indexed CPUs but we're playing safe.
1544 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1545 # know they might have memory configurations that could make use of highmem
1549 bool "High Memory Support"
1550 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1552 config CPU_SUPPORTS_HIGHMEM
1555 config SYS_SUPPORTS_HIGHMEM
1558 config SYS_SUPPORTS_SMARTMIPS
1561 config ARCH_FLATMEM_ENABLE
1565 config ARCH_DISCONTIGMEM_ENABLE
1567 default y if SGI_IP27
1569 Say Y to support efficient handling of discontiguous physical memory,
1570 for architectures which are either NUMA (Non-Uniform Memory Access)
1571 or have huge holes in the physical address space for other reasons.
1572 See <file:Documentation/vm/numa> for more.
1574 config ARCH_SPARSEMEM_ENABLE
1576 select SPARSEMEM_STATIC
1580 depends on SYS_SUPPORTS_NUMA
1582 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1583 Access). This option improves performance on systems with more
1584 than two nodes; on two node systems it is generally better to
1585 leave it disabled; on single node systems disable this option
1588 config SYS_SUPPORTS_NUMA
1594 depends on NEED_MULTIPLE_NODES
1599 bool "Multi-Processing support"
1600 depends on SYS_SUPPORTS_SMP
1603 This enables support for systems with more than one CPU. If you have
1604 a system with only one CPU, like most personal computers, say N. If
1605 you have a system with more than one CPU, say Y.
1607 If you say N here, the kernel will run on single and multiprocessor
1608 machines, but will use only one CPU of a multiprocessor machine. If
1609 you say Y here, the kernel will run on many, but not all,
1610 singleprocessor machines. On a singleprocessor machine, the kernel
1611 will run faster if you say N here.
1613 People using multiprocessor machines who say Y here should also say
1614 Y to "Enhanced Real Time Clock Support", below.
1616 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
1617 available at <http://www.tldp.org/docs.html#howto>.
1619 If you don't know what to do here, say N.
1621 config SYS_SUPPORTS_SMP
1624 config NR_CPUS_DEFAULT_1
1627 config NR_CPUS_DEFAULT_2
1630 config NR_CPUS_DEFAULT_4
1633 config NR_CPUS_DEFAULT_8
1636 config NR_CPUS_DEFAULT_16
1639 config NR_CPUS_DEFAULT_32
1642 config NR_CPUS_DEFAULT_64
1646 int "Maximum number of CPUs (2-64)"
1647 range 1 64 if NR_CPUS_DEFAULT_1
1649 default "1" if NR_CPUS_DEFAULT_1
1650 default "2" if NR_CPUS_DEFAULT_2
1651 default "4" if NR_CPUS_DEFAULT_4
1652 default "8" if NR_CPUS_DEFAULT_8
1653 default "16" if NR_CPUS_DEFAULT_16
1654 default "32" if NR_CPUS_DEFAULT_32
1655 default "64" if NR_CPUS_DEFAULT_64
1657 This allows you to specify the maximum number of CPUs which this
1658 kernel will support. The maximum supported value is 32 for 32-bit
1659 kernel and 64 for 64-bit kernels; the minimum value which makes
1660 sense is 1 for Qemu (useful only for kernel debugging purposes)
1661 and 2 for all others.
1663 This is purely to save memory - each supported CPU adds
1664 approximately eight kilobytes to the kernel image. For best
1665 performance should round up your number of processors to the next
1669 # Timer Interrupt Frequency Configuration
1673 prompt "Timer frequency"
1676 Allows the configuration of the timer frequency.
1679 bool "48 HZ" if SYS_SUPPORTS_48HZ
1682 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1685 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1688 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1691 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1694 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1697 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1701 config SYS_SUPPORTS_48HZ
1704 config SYS_SUPPORTS_100HZ
1707 config SYS_SUPPORTS_128HZ
1710 config SYS_SUPPORTS_250HZ
1713 config SYS_SUPPORTS_256HZ
1716 config SYS_SUPPORTS_1000HZ
1719 config SYS_SUPPORTS_1024HZ
1722 config SYS_SUPPORTS_ARBIT_HZ
1724 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1725 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1726 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1727 !SYS_SUPPORTS_1024HZ
1732 default 100 if HZ_100
1733 default 128 if HZ_128
1734 default 250 if HZ_250
1735 default 256 if HZ_256
1736 default 1000 if HZ_1000
1737 default 1024 if HZ_1024
1739 source "kernel/Kconfig.preempt"
1741 config MIPS_INSANE_LARGE
1742 bool "Support for large 64-bit configurations"
1743 depends on CPU_R10000 && 64BIT
1745 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1746 previous 64-bit processors which only supported 40 bit / 1TB. If you
1747 need processes of more than 1TB virtual address space, say Y here.
1748 This will result in additional memory usage, so it is not
1749 recommended for normal users.
1752 bool "Kexec system call (EXPERIMENTAL)"
1753 depends on EXPERIMENTAL
1755 kexec is a system call that implements the ability to shutdown your
1756 current kernel, and to start another kernel. It is like a reboot
1757 but it is independent of the system firmware. And like a reboot
1758 you can start any kernel with it, not just Linux.
1760 The name comes from the similiarity to the exec system call.
1762 It is an ongoing process to be certain the hardware in a machine
1763 is properly shutdown, so do not be surprised if this code does not
1764 initially work for you. It may help to enable device hotplugging
1765 support. As of this writing the exact hardware interface is
1766 strongly in flux, so no good recommendation can be made.
1769 bool "Enable seccomp to safely compute untrusted bytecode"
1773 This kernel feature is useful for number crunching applications
1774 that may need to compute untrusted bytecode during their
1775 execution. By using pipes or other transports made available to
1776 the process as file descriptors supporting the read/write
1777 syscalls, it's possible to isolate those applications in
1778 their own address space using seccomp. Once seccomp is
1779 enabled via /proc/<pid>/seccomp, it cannot be disabled
1780 and the task is only allowed to execute a few safe syscalls
1781 defined by each seccomp mode.
1783 If unsure, say Y. Only embedded should say N here.
1787 config RWSEM_GENERIC_SPINLOCK
1791 config LOCKDEP_SUPPORT
1795 config STACKTRACE_SUPPORT
1799 source "init/Kconfig"
1801 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1809 bool "Support for PCI controller"
1810 depends on HW_HAS_PCI
1812 Find out whether you have a PCI motherboard. PCI is the name of a
1813 bus system, i.e. the way the CPU talks to the other stuff inside
1814 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
1817 The PCI-HOWTO, available from
1818 <http://www.tldp.org/docs.html#howto>, contains valuable
1819 information about which PCI hardware does work under Linux and which
1826 source "drivers/pci/Kconfig"
1829 # ISA support is now enabled via select. Too many systems still have the one
1830 # or other ISA chip on the board that users don't know about so don't expect
1831 # users to choose the right thing ...
1838 depends on HW_HAS_EISA
1840 select GENERIC_ISA_DMA
1842 The Extended Industry Standard Architecture (EISA) bus was
1843 developed as an open alternative to the IBM MicroChannel bus.
1845 The EISA bus provided some of the features of the IBM MicroChannel
1846 bus while maintaining backward compatibility with cards made for
1847 the older ISA bus. The EISA bus saw limited use between 1988 and
1848 1995 when it was made obsolete by the PCI bus.
1850 Say Y here if you are building a kernel for an EISA-based machine.
1854 source "drivers/eisa/Kconfig"
1857 bool "TURBOchannel support"
1858 depends on MACH_DECSTATION
1860 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
1861 processors. Documentation on writing device drivers for TurboChannel
1863 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
1866 # bool "Access.Bus support"
1876 source "drivers/pcmcia/Kconfig"
1878 source "drivers/pci/hotplug/Kconfig"
1882 menu "Executable file formats"
1884 source "fs/Kconfig.binfmt"
1890 bool "Include IRIX binary compatibility"
1891 depends on CPU_BIG_ENDIAN && 32BIT && BROKEN
1893 config MIPS32_COMPAT
1894 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
1897 Select this option if you want Linux/MIPS 32-bit binary
1898 compatibility. Since all software available for Linux/MIPS is
1899 currently 32-bit you should say Y here.
1903 depends on MIPS32_COMPAT
1906 config SYSVIPC_COMPAT
1908 depends on COMPAT && SYSVIPC
1912 bool "Kernel support for o32 binaries"
1913 depends on MIPS32_COMPAT
1915 Select this option if you want to run o32 binaries. These are pure
1916 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
1917 existing binaries are in this format.
1922 bool "Kernel support for n32 binaries"
1923 depends on MIPS32_COMPAT
1925 Select this option if you want to run n32 binaries. These are
1926 64-bit binaries using 32-bit quantities for addressing and certain
1927 data that would normally be 64-bit. They are used in special
1934 default y if MIPS32_O32 || MIPS32_N32
1938 menu "Power management options"
1940 source "kernel/power/Kconfig"
1944 source "net/Kconfig"
1946 source "drivers/Kconfig"
1950 source "arch/mips/oprofile/Kconfig"
1952 source "arch/mips/Kconfig.debug"
1954 source "security/Kconfig"
1956 source "crypto/Kconfig"
1958 source "lib/Kconfig"