7 # Horrible source of confusion. Die, die, die ...
11 mainmenu "Linux/MIPS Kernel Configuration"
13 menu "Machine selection"
23 bool "Alchemy processor based machines"
26 bool "Basler eXcite smart camera"
35 select SYS_HAS_CPU_RM9000
36 select SYS_SUPPORTS_32BIT_KERNEL
37 select SYS_SUPPORTS_BIG_ENDIAN
39 The eXcite is a smart camera platform manufactured by
40 Basler Vision Technologies AG.
43 bool "BCM47XX based boards"
46 select DMA_NONCOHERENT
49 select SYS_HAS_CPU_MIPS32_R1
50 select SYS_SUPPORTS_32BIT_KERNEL
51 select SYS_SUPPORTS_LITTLE_ENDIAN
53 select SSB_DRIVER_MIPS
54 select SSB_DRIVER_EXTIF
56 select SSB_PCICORE_HOSTMODE if PCI
58 select SYS_HAS_EARLY_PRINTK
61 Support for BCM47XX based boards
68 select DMA_NONCOHERENT
74 select PCI_GT64XXX_PCI0
75 select SYS_HAS_CPU_NEVADA
76 select SYS_HAS_EARLY_PRINTK
77 select SYS_SUPPORTS_32BIT_KERNEL
78 select SYS_SUPPORTS_64BIT_KERNEL
79 select SYS_SUPPORTS_LITTLE_ENDIAN
80 select GENERIC_HARDIRQS_NO__DO_IRQ
82 config MACH_DECSTATION
89 select CPU_DADDI_WORKAROUNDS if 64BIT
90 select CPU_R4000_WORKAROUNDS if 64BIT
91 select CPU_R4400_WORKAROUNDS if 64BIT
92 select DMA_NONCOHERENT
95 select SYS_HAS_CPU_R3000
96 select SYS_HAS_CPU_R4X00
97 select SYS_SUPPORTS_32BIT_KERNEL
98 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
99 select SYS_SUPPORTS_LITTLE_ENDIAN
100 select SYS_SUPPORTS_128HZ
101 select SYS_SUPPORTS_256HZ
102 select SYS_SUPPORTS_1024HZ
104 This enables support for DEC's MIPS based workstations. For details
105 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
106 DECstation porting pages on <http://decstation.unix-ag.org/>.
108 If you have one of the following DECstation Models you definitely
109 want to choose R4xx0 for the CPU Type:
116 otherwise choose R3000.
119 bool "Jazz family of machines"
122 select ARCH_MAY_HAVE_PC_FDC
125 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
126 select GENERIC_ISA_DMA
131 select SYS_HAS_CPU_R4X00
132 select SYS_SUPPORTS_32BIT_KERNEL
133 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
134 select SYS_SUPPORTS_100HZ
135 select GENERIC_HARDIRQS_NO__DO_IRQ
137 This a family of machines based on the MIPS R4030 chipset which was
138 used by several vendors to build RISC/os and Windows NT workstations.
139 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millenium and
140 Olivetti M700-10 workstations.
143 bool "LASAT Networks platforms"
146 select DMA_NONCOHERENT
147 select SYS_HAS_EARLY_PRINTK
150 select PCI_GT64XXX_PCI0
152 select R5000_CPU_SCACHE
153 select SYS_HAS_CPU_R5000
154 select SYS_SUPPORTS_32BIT_KERNEL
155 select SYS_SUPPORTS_64BIT_KERNEL if BROKEN
156 select SYS_SUPPORTS_LITTLE_ENDIAN
157 select GENERIC_HARDIRQS_NO__DO_IRQ
160 bool "Lemote Fulong mini-PC"
161 select ARCH_SPARSEMEM_ENABLE
164 select SYS_HAS_CPU_LOONGSON2
165 select DMA_NONCOHERENT
168 select HAVE_STD_PC_SERIAL_PORT
173 select SYS_SUPPORTS_32BIT_KERNEL
174 select SYS_SUPPORTS_64BIT_KERNEL
175 select SYS_SUPPORTS_LITTLE_ENDIAN
176 select SYS_SUPPORTS_HIGHMEM
177 select SYS_HAS_EARLY_PRINTK
178 select GENERIC_HARDIRQS_NO__DO_IRQ
179 select GENERIC_ISA_DMA_SUPPORT_BROKEN
182 Lemote Fulong mini-PC board based on the Chinese Loongson-2E CPU and
186 bool "MIPS Malta board"
187 select ARCH_MAY_HAVE_PC_FDC
192 select DMA_NONCOHERENT
193 select GENERIC_ISA_DMA
199 select MIPS_BOARDS_GEN
201 select MIPS_CPU_SCACHE
202 select PCI_GT64XXX_PCI0
205 select SYS_HAS_CPU_MIPS32_R1
206 select SYS_HAS_CPU_MIPS32_R2
207 select SYS_HAS_CPU_MIPS64_R1
208 select SYS_HAS_CPU_NEVADA
209 select SYS_HAS_CPU_RM7000
210 select SYS_HAS_EARLY_PRINTK
211 select SYS_SUPPORTS_32BIT_KERNEL
212 select SYS_SUPPORTS_64BIT_KERNEL
213 select SYS_SUPPORTS_BIG_ENDIAN
214 select SYS_SUPPORTS_LITTLE_ENDIAN
215 select SYS_SUPPORTS_MIPS_CMP if BROKEN # because SYNC_R4K is broken
216 select SYS_SUPPORTS_MULTITHREADING
217 select SYS_SUPPORTS_SMARTMIPS
219 This enables support for the MIPS Technologies Malta evaluation
223 bool 'MIPS simulator (MIPSsim)'
226 select DMA_NONCOHERENT
227 select SYS_HAS_EARLY_PRINTK
230 select SYS_HAS_CPU_MIPS32_R1
231 select SYS_HAS_CPU_MIPS32_R2
232 select SYS_HAS_EARLY_PRINTK
233 select SYS_SUPPORTS_32BIT_KERNEL
234 select SYS_SUPPORTS_BIG_ENDIAN
235 select SYS_SUPPORTS_MULTITHREADING
236 select SYS_SUPPORTS_LITTLE_ENDIAN
238 This option enables support for MIPS Technologies MIPSsim software
242 bool "NEC EMMA series based machines"
245 bool "NEC VR4100 series based machines"
248 select SYS_HAS_CPU_VR41XX
249 select GENERIC_HARDIRQS_NO__DO_IRQ
252 bool "NXP STB220 board"
255 Support for NXP Semiconductors STB220 Development Board.
262 Support for NXP Semiconductors STB225 Development Board.
265 bool "NXP PNX8550 based JBS board"
267 select SYS_SUPPORTS_LITTLE_ENDIAN
269 config PNX8550_STB810
270 bool "NXP PNX8550 based STB810 board"
272 select SYS_SUPPORTS_LITTLE_ENDIAN
275 bool "PMC-Sierra MSP chipsets"
276 depends on EXPERIMENTAL
277 select DMA_NONCOHERENT
279 select NO_EXCEPT_FILL
281 select SYS_HAS_CPU_MIPS32_R1
282 select SYS_HAS_CPU_MIPS32_R2
283 select SYS_SUPPORTS_32BIT_KERNEL
284 select SYS_SUPPORTS_BIG_ENDIAN
287 select SERIAL_8250_CONSOLE
289 This adds support for the PMC-Sierra family of Multi-Service
290 Processor System-On-A-Chips. These parts include a number
291 of integrated peripherals, interfaces and DSPs in addition to
292 a variety of MIPS cores.
295 bool "PMC-Sierra Yosemite eval board"
304 select SYS_HAS_CPU_RM9000
305 select SYS_HAS_EARLY_PRINTK
306 select SYS_SUPPORTS_32BIT_KERNEL
307 select SYS_SUPPORTS_64BIT_KERNEL
308 select SYS_SUPPORTS_BIG_ENDIAN
309 select SYS_SUPPORTS_HIGHMEM
310 select SYS_SUPPORTS_SMP
312 Yosemite is an evaluation board for the RM9000x2 processor
313 manufactured by PMC-Sierra.
316 bool "SGI IP22 (Indy/Indigo2)"
322 select DEFAULT_SGI_PARTITION
323 select DMA_NONCOHERENT
327 select IP22_CPU_SCACHE
329 select GENERIC_ISA_DMA_SUPPORT_BROKEN
331 select SGI_HAS_INDYDOG
337 select SYS_HAS_CPU_R4X00
338 select SYS_HAS_CPU_R5000
339 select SYS_HAS_EARLY_PRINTK
340 select SYS_SUPPORTS_32BIT_KERNEL
341 select SYS_SUPPORTS_64BIT_KERNEL
342 select SYS_SUPPORTS_BIG_ENDIAN
344 This are the SGI Indy, Challenge S and Indigo2, as well as certain
345 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
346 that runs on these, say Y here.
349 bool "SGI IP27 (Origin200/2000)"
353 select DEFAULT_SGI_PARTITION
355 select SYS_HAS_EARLY_PRINTK
357 select NR_CPUS_DEFAULT_64
358 select SYS_HAS_CPU_R10000
359 select SYS_SUPPORTS_64BIT_KERNEL
360 select SYS_SUPPORTS_BIG_ENDIAN
361 select SYS_SUPPORTS_NUMA
362 select SYS_SUPPORTS_SMP
363 select GENERIC_HARDIRQS_NO__DO_IRQ
365 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
366 workstations. To compile a Linux kernel that runs on these, say Y
370 bool "SGI IP28 (Indigo2 R10k) (EXPERIMENTAL)"
371 depends on EXPERIMENTAL
377 select DEFAULT_SGI_PARTITION
378 select DMA_NONCOHERENT
379 select GENERIC_ISA_DMA_SUPPORT_BROKEN
385 select SGI_HAS_INDYDOG
391 select SYS_HAS_CPU_R10000
392 select SYS_HAS_EARLY_PRINTK
393 select SYS_SUPPORTS_64BIT_KERNEL
394 select SYS_SUPPORTS_BIG_ENDIAN
396 This is the SGI Indigo2 with R10000 processor. To compile a Linux
397 kernel that runs on these, say Y here.
406 select DMA_NONCOHERENT
409 select R5000_CPU_SCACHE
410 select RM7000_CPU_SCACHE
411 select SYS_HAS_CPU_R5000
412 select SYS_HAS_CPU_R10000 if BROKEN
413 select SYS_HAS_CPU_RM7000
414 select SYS_HAS_CPU_NEVADA
415 select SYS_SUPPORTS_64BIT_KERNEL
416 select SYS_SUPPORTS_BIG_ENDIAN
418 If you want this kernel to run on SGI O2 workstation, say Y here.
421 bool "Sibyte BCM91120C-CRhine"
422 depends on EXPERIMENTAL
425 select SIBYTE_BCM1120
427 select SYS_HAS_CPU_SB1
428 select SYS_SUPPORTS_BIG_ENDIAN
429 select SYS_SUPPORTS_LITTLE_ENDIAN
432 bool "Sibyte BCM91120x-Carmel"
433 depends on EXPERIMENTAL
436 select SIBYTE_BCM1120
438 select SYS_HAS_CPU_SB1
439 select SYS_SUPPORTS_BIG_ENDIAN
440 select SYS_SUPPORTS_LITTLE_ENDIAN
443 bool "Sibyte BCM91125C-CRhone"
444 depends on EXPERIMENTAL
447 select SIBYTE_BCM1125
449 select SYS_HAS_CPU_SB1
450 select SYS_SUPPORTS_BIG_ENDIAN
451 select SYS_SUPPORTS_HIGHMEM
452 select SYS_SUPPORTS_LITTLE_ENDIAN
455 bool "Sibyte BCM91125E-Rhone"
456 depends on EXPERIMENTAL
459 select SIBYTE_BCM1125H
461 select SYS_HAS_CPU_SB1
462 select SYS_SUPPORTS_BIG_ENDIAN
463 select SYS_SUPPORTS_LITTLE_ENDIAN
466 bool "Sibyte BCM91250A-SWARM"
469 select NR_CPUS_DEFAULT_2
472 select SYS_HAS_CPU_SB1
473 select SYS_SUPPORTS_BIG_ENDIAN
474 select SYS_SUPPORTS_HIGHMEM
475 select SYS_SUPPORTS_LITTLE_ENDIAN
476 select ZONE_DMA32 if 64BIT
478 config SIBYTE_LITTLESUR
479 bool "Sibyte BCM91250C2-LittleSur"
480 depends on EXPERIMENTAL
483 select NR_CPUS_DEFAULT_2
486 select SYS_HAS_CPU_SB1
487 select SYS_SUPPORTS_BIG_ENDIAN
488 select SYS_SUPPORTS_HIGHMEM
489 select SYS_SUPPORTS_LITTLE_ENDIAN
491 config SIBYTE_SENTOSA
492 bool "Sibyte BCM91250E-Sentosa"
493 depends on EXPERIMENTAL
496 select NR_CPUS_DEFAULT_2
499 select SYS_HAS_CPU_SB1
500 select SYS_SUPPORTS_BIG_ENDIAN
501 select SYS_SUPPORTS_LITTLE_ENDIAN
504 bool "Sibyte BCM91480B-BigSur"
507 select NR_CPUS_DEFAULT_4
508 select SIBYTE_BCM1x80
510 select SYS_HAS_CPU_SB1
511 select SYS_SUPPORTS_BIG_ENDIAN
512 select SYS_SUPPORTS_HIGHMEM
513 select SYS_SUPPORTS_LITTLE_ENDIAN
514 select ZONE_DMA32 if 64BIT
517 bool "SNI RM200/300/400"
518 select ARC if CPU_LITTLE_ENDIAN
519 select ARC32 if CPU_LITTLE_ENDIAN
520 select SNIPROM if CPU_BIG_ENDIAN
521 select ARCH_MAY_HAVE_PC_FDC
525 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
526 select DMA_NONCOHERENT
527 select GENERIC_ISA_DMA
534 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
535 select SYS_HAS_CPU_R4X00
536 select SYS_HAS_CPU_R5000
537 select SYS_HAS_CPU_R10000
538 select R5000_CPU_SCACHE
539 select SYS_HAS_EARLY_PRINTK
540 select SYS_SUPPORTS_32BIT_KERNEL
541 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
542 select SYS_SUPPORTS_BIG_ENDIAN
543 select SYS_SUPPORTS_HIGHMEM
544 select SYS_SUPPORTS_LITTLE_ENDIAN
546 The SNI RM200/300/400 are MIPS-based machines manufactured by
547 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
548 Technology and now in turn merged with Fujitsu. Say Y here to
549 support this machine type.
552 bool "Toshiba TX39 series based machines"
555 bool "Toshiba TX49 series based machines"
557 config MIKROTIK_RB532
558 bool "Mikrotik RB532 boards"
561 select DMA_NONCOHERENT
562 select GENERIC_HARDIRQS_NO__DO_IRQ
565 select SYS_HAS_CPU_MIPS32_R1
566 select SYS_SUPPORTS_32BIT_KERNEL
567 select SYS_SUPPORTS_LITTLE_ENDIAN
570 select ARCH_REQUIRE_GPIOLIB
572 Support the Mikrotik(tm) RouterBoard 532 series,
573 based on the IDT RC32434 SoC.
576 bool "Wind River PPMC board"
581 select DMA_NONCOHERENT
583 select PCI_GT64XXX_PCI0
585 select SYS_HAS_CPU_MIPS32_R1
586 select SYS_HAS_CPU_MIPS32_R2
587 select SYS_HAS_CPU_MIPS64_R1
588 select SYS_HAS_CPU_NEVADA
589 select SYS_HAS_CPU_RM7000
590 select SYS_SUPPORTS_32BIT_KERNEL
591 select SYS_SUPPORTS_64BIT_KERNEL
592 select SYS_SUPPORTS_BIG_ENDIAN
593 select SYS_SUPPORTS_LITTLE_ENDIAN
595 This enables support for the Wind River MIPS32 4KC PPMC evaluation
596 board, which is based on GT64120 bridge chip.
598 config CAVIUM_OCTEON_SIMULATOR
599 bool "Support for the Cavium Networks Octeon Simulator"
601 select 64BIT_PHYS_ADDR
603 select SYS_SUPPORTS_64BIT_KERNEL
604 select SYS_SUPPORTS_BIG_ENDIAN
605 select SYS_SUPPORTS_HIGHMEM
606 select CPU_CAVIUM_OCTEON
608 The Octeon simulator is software performance model of the Cavium
609 Octeon Processor. It supports simulating Octeon processors on x86
612 config CAVIUM_OCTEON_REFERENCE_BOARD
613 bool "Support for the Cavium Networks Octeon reference board"
615 select 64BIT_PHYS_ADDR
617 select SYS_SUPPORTS_64BIT_KERNEL
618 select SYS_SUPPORTS_BIG_ENDIAN
619 select SYS_SUPPORTS_HIGHMEM
620 select SYS_HAS_EARLY_PRINTK
621 select CPU_CAVIUM_OCTEON
624 This option supports all of the Octeon reference boards from Cavium
625 Networks. It builds a kernel that dynamically determines the Octeon
626 CPU type and supports all known board reference implementations.
627 Some of the supported boards are:
634 Say Y here for most Octeon reference boards.
638 source "arch/mips/alchemy/Kconfig"
639 source "arch/mips/basler/excite/Kconfig"
640 source "arch/mips/emma/Kconfig"
641 source "arch/mips/jazz/Kconfig"
642 source "arch/mips/lasat/Kconfig"
643 source "arch/mips/pmc-sierra/Kconfig"
644 source "arch/mips/sgi-ip27/Kconfig"
645 source "arch/mips/sibyte/Kconfig"
646 source "arch/mips/txx9/Kconfig"
647 source "arch/mips/vr41xx/Kconfig"
648 source "arch/mips/cavium-octeon/Kconfig"
652 config RWSEM_GENERIC_SPINLOCK
656 config RWSEM_XCHGADD_ALGORITHM
659 config ARCH_HAS_ILOG2_U32
663 config ARCH_HAS_ILOG2_U64
667 config ARCH_SUPPORTS_OPROFILE
669 default y if !MIPS_MT_SMTC
671 config GENERIC_FIND_NEXT_BIT
675 config GENERIC_HWEIGHT
679 config GENERIC_CALIBRATE_DELAY
683 config GENERIC_CLOCKEVENTS
691 config GENERIC_CMOS_UPDATE
695 config SCHED_OMIT_FRAME_POINTER
699 config GENERIC_HARDIRQS_NO__DO_IRQ
704 # Select some configuration options automatically based on user selections.
709 config ARCH_MAY_HAVE_PC_FDC
747 select ARCH_REQUIRE_GPIOLIB
759 config DMA_NONCOHERENT
761 select DMA_NEED_PCI_MAP_STATE
763 config DMA_NEED_PCI_MAP_STATE
767 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
768 depends on SYS_HAS_EARLY_PRINTK
771 This option enables special console drivers which allow the kernel
772 to print messages very early in the bootup process.
774 This is useful for kernel debugging when your machine crashes very
775 early before the console code is initialized. For normal operation,
776 it is not recommended because it looks ugly on some machines and
777 doesn't cooperate with an X server. You should normally say N here,
778 unless you want to debug such a crash.
780 config SYS_HAS_EARLY_PRINTK
799 config MIPS_DISABLE_OBSOLETE_IDE
808 config GENERIC_ISA_DMA
810 select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
812 config GENERIC_ISA_DMA_SUPPORT_BROKEN
814 select GENERIC_ISA_DMA
820 # Endianess selection. Sufficiently obscure so many users don't know what to
821 # answer,so we try hard to limit the available choices. Also the use of a
822 # choice statement should be more obvious to the user.
825 prompt "Endianess selection"
827 Some MIPS machines can be configured for either little or big endian
828 byte order. These modes require different kernels and a different
829 Linux distribution. In general there is one preferred byteorder for a
830 particular system but some systems are just as commonly used in the
831 one or the other endianness.
833 config CPU_BIG_ENDIAN
835 depends on SYS_SUPPORTS_BIG_ENDIAN
837 config CPU_LITTLE_ENDIAN
839 depends on SYS_SUPPORTS_LITTLE_ENDIAN
844 config SYS_SUPPORTS_APM_EMULATION
847 config SYS_SUPPORTS_BIG_ENDIAN
850 config SYS_SUPPORTS_LITTLE_ENDIAN
877 config IRQ_CPU_OCTEON
880 config MIPS_BOARDS_GEN
883 config PCI_GT64XXX_PCI0
886 config NO_EXCEPT_FILL
898 select DMA_NONCOHERENT
899 select SYS_HAS_CPU_MIPS32_R2
900 select SYS_SUPPORTS_32BIT_KERNEL
901 select SYS_SUPPORTS_LITTLE_ENDIAN
902 select SYS_SUPPORTS_BIG_ENDIAN
903 select GENERIC_HARDIRQS_NO__DO_IRQ
905 select CPU_MIPSR2_IRQ_VI
917 select DMA_NONCOHERENT
919 select SYS_HAS_CPU_MIPS32_R1
920 select SYS_HAS_EARLY_PRINTK
921 select SYS_SUPPORTS_32BIT_KERNEL
922 select GENERIC_HARDIRQS_NO__DO_IRQ
936 config SGI_HAS_INDYDOG
954 config DEFAULT_SGI_PARTITION
966 config MIPS_L1_CACHE_SHIFT
968 default "4" if MACH_DECSTATION || MIKROTIK_RB532
969 default "7" if SGI_IP22 || SGI_IP27 || SGI_IP28 || SNI_RM || CPU_CAVIUM_OCTEON
970 default "4" if PMC_MSP4200_EVAL
973 config HAVE_STD_PC_SERIAL_PORT
977 bool "ARC console support"
978 depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
982 depends on MACH_JAZZ || SNI_RM || SGI_IP32
987 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP28 || SGI_IP32
1002 config CPU_LOONGSON2
1004 depends on SYS_HAS_CPU_LOONGSON2
1005 select CPU_SUPPORTS_32BIT_KERNEL
1006 select CPU_SUPPORTS_64BIT_KERNEL
1007 select CPU_SUPPORTS_HIGHMEM
1009 The Loongson 2E processor implements the MIPS III instruction set
1010 with many extensions.
1012 config CPU_MIPS32_R1
1013 bool "MIPS32 Release 1"
1014 depends on SYS_HAS_CPU_MIPS32_R1
1016 select CPU_HAS_PREFETCH
1017 select CPU_SUPPORTS_32BIT_KERNEL
1018 select CPU_SUPPORTS_HIGHMEM
1020 Choose this option to build a kernel for release 1 or later of the
1021 MIPS32 architecture. Most modern embedded systems with a 32-bit
1022 MIPS processor are based on a MIPS32 processor. If you know the
1023 specific type of processor in your system, choose those that one
1024 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1025 Release 2 of the MIPS32 architecture is available since several
1026 years so chances are you even have a MIPS32 Release 2 processor
1027 in which case you should choose CPU_MIPS32_R2 instead for better
1030 config CPU_MIPS32_R2
1031 bool "MIPS32 Release 2"
1032 depends on SYS_HAS_CPU_MIPS32_R2
1034 select CPU_HAS_PREFETCH
1035 select CPU_SUPPORTS_32BIT_KERNEL
1036 select CPU_SUPPORTS_HIGHMEM
1038 Choose this option to build a kernel for release 2 or later of the
1039 MIPS32 architecture. Most modern embedded systems with a 32-bit
1040 MIPS processor are based on a MIPS32 processor. If you know the
1041 specific type of processor in your system, choose those that one
1042 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1044 config CPU_MIPS64_R1
1045 bool "MIPS64 Release 1"
1046 depends on SYS_HAS_CPU_MIPS64_R1
1048 select CPU_HAS_PREFETCH
1049 select CPU_SUPPORTS_32BIT_KERNEL
1050 select CPU_SUPPORTS_64BIT_KERNEL
1051 select CPU_SUPPORTS_HIGHMEM
1053 Choose this option to build a kernel for release 1 or later of the
1054 MIPS64 architecture. Many modern embedded systems with a 64-bit
1055 MIPS processor are based on a MIPS64 processor. If you know the
1056 specific type of processor in your system, choose those that one
1057 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1058 Release 2 of the MIPS64 architecture is available since several
1059 years so chances are you even have a MIPS64 Release 2 processor
1060 in which case you should choose CPU_MIPS64_R2 instead for better
1063 config CPU_MIPS64_R2
1064 bool "MIPS64 Release 2"
1065 depends on SYS_HAS_CPU_MIPS64_R2
1067 select CPU_HAS_PREFETCH
1068 select CPU_SUPPORTS_32BIT_KERNEL
1069 select CPU_SUPPORTS_64BIT_KERNEL
1070 select CPU_SUPPORTS_HIGHMEM
1072 Choose this option to build a kernel for release 2 or later of the
1073 MIPS64 architecture. Many modern embedded systems with a 64-bit
1074 MIPS processor are based on a MIPS64 processor. If you know the
1075 specific type of processor in your system, choose those that one
1076 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1080 depends on SYS_HAS_CPU_R3000
1082 select CPU_SUPPORTS_32BIT_KERNEL
1083 select CPU_SUPPORTS_HIGHMEM
1085 Please make sure to pick the right CPU type. Linux/MIPS is not
1086 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
1087 *not* work on R4000 machines and vice versa. However, since most
1088 of the supported machines have an R4000 (or similar) CPU, R4x00
1089 might be a safe bet. If the resulting kernel does not work,
1090 try to recompile with R3000.
1094 depends on SYS_HAS_CPU_TX39XX
1095 select CPU_SUPPORTS_32BIT_KERNEL
1099 depends on SYS_HAS_CPU_VR41XX
1100 select CPU_SUPPORTS_32BIT_KERNEL
1101 select CPU_SUPPORTS_64BIT_KERNEL
1103 The options selects support for the NEC VR4100 series of processors.
1104 Only choose this option if you have one of these processors as a
1105 kernel built with this option will not run on any other type of
1106 processor or vice versa.
1110 depends on SYS_HAS_CPU_R4300
1112 select CPU_SUPPORTS_32BIT_KERNEL
1113 select CPU_SUPPORTS_64BIT_KERNEL
1115 MIPS Technologies R4300-series processors.
1119 depends on SYS_HAS_CPU_R4X00
1121 select CPU_SUPPORTS_32BIT_KERNEL
1122 select CPU_SUPPORTS_64BIT_KERNEL
1124 MIPS Technologies R4000-series processors other than 4300, including
1125 the R4000, R4400, R4600, and 4700.
1129 depends on SYS_HAS_CPU_TX49XX
1131 select CPU_HAS_PREFETCH
1132 select CPU_SUPPORTS_32BIT_KERNEL
1133 select CPU_SUPPORTS_64BIT_KERNEL
1137 depends on SYS_HAS_CPU_R5000
1139 select CPU_SUPPORTS_32BIT_KERNEL
1140 select CPU_SUPPORTS_64BIT_KERNEL
1142 MIPS Technologies R5000-series processors other than the Nevada.
1146 depends on SYS_HAS_CPU_R5432
1148 select CPU_SUPPORTS_32BIT_KERNEL
1149 select CPU_SUPPORTS_64BIT_KERNEL
1153 depends on SYS_HAS_CPU_R5500
1155 select CPU_SUPPORTS_32BIT_KERNEL
1156 select CPU_SUPPORTS_64BIT_KERNEL
1158 NEC VR5500 and VR5500A series processors implement 64-bit MIPS IV
1163 depends on EXPERIMENTAL
1165 depends on SYS_HAS_CPU_R6000
1166 select CPU_SUPPORTS_32BIT_KERNEL
1168 MIPS Technologies R6000 and R6000A series processors. Note these
1169 processors are extremely rare and the support for them is incomplete.
1173 depends on SYS_HAS_CPU_NEVADA
1175 select CPU_SUPPORTS_32BIT_KERNEL
1176 select CPU_SUPPORTS_64BIT_KERNEL
1178 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1182 depends on EXPERIMENTAL
1183 depends on SYS_HAS_CPU_R8000
1185 select CPU_HAS_PREFETCH
1186 select CPU_SUPPORTS_64BIT_KERNEL
1188 MIPS Technologies R8000 processors. Note these processors are
1189 uncommon and the support for them is incomplete.
1193 depends on SYS_HAS_CPU_R10000
1195 select CPU_HAS_PREFETCH
1196 select CPU_SUPPORTS_32BIT_KERNEL
1197 select CPU_SUPPORTS_64BIT_KERNEL
1198 select CPU_SUPPORTS_HIGHMEM
1200 MIPS Technologies R10000-series processors.
1204 depends on SYS_HAS_CPU_RM7000
1206 select CPU_HAS_PREFETCH
1207 select CPU_SUPPORTS_32BIT_KERNEL
1208 select CPU_SUPPORTS_64BIT_KERNEL
1209 select CPU_SUPPORTS_HIGHMEM
1213 depends on SYS_HAS_CPU_RM9000
1215 select CPU_HAS_PREFETCH
1216 select CPU_SUPPORTS_32BIT_KERNEL
1217 select CPU_SUPPORTS_64BIT_KERNEL
1218 select CPU_SUPPORTS_HIGHMEM
1219 select WEAK_ORDERING
1223 depends on SYS_HAS_CPU_SB1
1225 select CPU_SUPPORTS_32BIT_KERNEL
1226 select CPU_SUPPORTS_64BIT_KERNEL
1227 select CPU_SUPPORTS_HIGHMEM
1228 select WEAK_ORDERING
1230 config CPU_CAVIUM_OCTEON
1231 bool "Cavium Octeon processor"
1233 select IRQ_CPU_OCTEON
1234 select CPU_HAS_PREFETCH
1235 select CPU_SUPPORTS_64BIT_KERNEL
1236 select SYS_SUPPORTS_SMP
1237 select NR_CPUS_DEFAULT_16
1238 select WEAK_ORDERING
1239 select WEAK_REORDERING_BEYOND_LLSC
1240 select CPU_SUPPORTS_HIGHMEM
1242 The Cavium Octeon processor is a highly integrated chip containing
1243 many ethernet hardware widgets for networking tasks. The processor
1244 can have up to 16 Mips64v2 cores and 8 integrated gigabit ethernets.
1245 Full details can be found at http://www.caviumnetworks.com.
1249 config SYS_HAS_CPU_LOONGSON2
1252 config SYS_HAS_CPU_MIPS32_R1
1255 config SYS_HAS_CPU_MIPS32_R2
1258 config SYS_HAS_CPU_MIPS64_R1
1261 config SYS_HAS_CPU_MIPS64_R2
1264 config SYS_HAS_CPU_R3000
1267 config SYS_HAS_CPU_TX39XX
1270 config SYS_HAS_CPU_VR41XX
1273 config SYS_HAS_CPU_R4300
1276 config SYS_HAS_CPU_R4X00
1279 config SYS_HAS_CPU_TX49XX
1282 config SYS_HAS_CPU_R5000
1285 config SYS_HAS_CPU_R5432
1288 config SYS_HAS_CPU_R5500
1291 config SYS_HAS_CPU_R6000
1294 config SYS_HAS_CPU_NEVADA
1297 config SYS_HAS_CPU_R8000
1300 config SYS_HAS_CPU_R10000
1303 config SYS_HAS_CPU_RM7000
1306 config SYS_HAS_CPU_RM9000
1309 config SYS_HAS_CPU_SB1
1313 # CPU may reorder R->R, R->W, W->R, W->W
1314 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1316 config WEAK_ORDERING
1320 # CPU may reorder reads and writes beyond LL/SC
1321 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1323 config WEAK_REORDERING_BEYOND_LLSC
1328 # These two indicate any level of the MIPS32 and MIPS64 architecture
1332 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1336 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1339 # These two indicate the revision of the architecture, either Release 1 or Release 2
1343 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1347 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_CAVIUM_OCTEON
1349 config SYS_SUPPORTS_32BIT_KERNEL
1351 config SYS_SUPPORTS_64BIT_KERNEL
1353 config CPU_SUPPORTS_32BIT_KERNEL
1355 config CPU_SUPPORTS_64BIT_KERNEL
1359 # Set to y for ptrace access to watch registers.
1361 config HARDWARE_WATCHPOINTS
1363 default y if CPU_MIPS32 || CPU_MIPS64
1369 prompt "Kernel code model"
1371 You should only select this option if you have a workload that
1372 actually benefits from 64-bit processing or if your machine has
1373 large memory. You will only be presented a single option in this
1374 menu if your system does not support both 32-bit and 64-bit kernels.
1377 bool "32-bit kernel"
1378 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1381 Select this option if you want to build a 32-bit kernel.
1383 bool "64-bit kernel"
1384 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1386 Select this option if you want to build a 64-bit kernel.
1391 prompt "Kernel page size"
1392 default PAGE_SIZE_4KB
1394 config PAGE_SIZE_4KB
1397 This option select the standard 4kB Linux page size. On some
1398 R3000-family processors this is the only available page size. Using
1399 4kB page size will minimize memory consumption and is therefore
1400 recommended for low memory systems.
1402 config PAGE_SIZE_8KB
1404 depends on EXPERIMENTAL && CPU_R8000
1406 Using 8kB page size will result in higher performance kernel at
1407 the price of higher memory consumption. This option is available
1408 only on the R8000 processor. Not that at the time of this writing
1409 this option is still high experimental; there are also issues with
1410 compatibility of user applications.
1412 config PAGE_SIZE_16KB
1414 depends on !CPU_R3000 && !CPU_TX39XX
1416 Using 16kB page size will result in higher performance kernel at
1417 the price of higher memory consumption. This option is available on
1418 all non-R3000 family processors. Note that you will need a suitable
1419 Linux distribution to support this.
1421 config PAGE_SIZE_64KB
1423 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1425 Using 64kB page size will result in higher performance kernel at
1426 the price of higher memory consumption. This option is available on
1427 all non-R3000 family processor. Not that at the time of this
1428 writing this option is still high experimental.
1435 config IP22_CPU_SCACHE
1440 # Support for a MIPS32 / MIPS64 style S-caches
1442 config MIPS_CPU_SCACHE
1446 config R5000_CPU_SCACHE
1450 config RM7000_CPU_SCACHE
1454 config SIBYTE_DMA_PAGEOPS
1455 bool "Use DMA to clear/copy pages"
1458 Instead of using the CPU to zero and copy pages, use a Data Mover
1459 channel. These DMA channels are otherwise unused by the standard
1460 SiByte Linux port. Seems to give a small performance benefit.
1462 config CPU_HAS_PREFETCH
1466 prompt "MIPS MT options"
1468 config MIPS_MT_DISABLED
1469 bool "Disable multithreading support."
1471 Use this option if your workload can't take advantage of
1472 MIPS hardware multithreading support. On systems that don't have
1473 the option of an MT-enabled processor this option will be the only
1474 option in this menu.
1477 bool "Use 1 TC on each available VPE for SMP"
1478 depends on SYS_SUPPORTS_MULTITHREADING
1479 select CPU_MIPSR2_IRQ_VI
1480 select CPU_MIPSR2_IRQ_EI
1482 select NR_CPUS_DEFAULT_2
1484 select SYS_SUPPORTS_SCHED_SMT if SMP
1485 select SYS_SUPPORTS_SMP
1488 This is a kernel model which is also known a VSMP or lately
1489 has been marketesed into SMVP.
1492 bool "SMTC: Use all TCs on all VPEs for SMP"
1493 depends on CPU_MIPS32_R2
1494 #depends on CPU_MIPS64_R2 # once there is hardware ...
1495 depends on SYS_SUPPORTS_MULTITHREADING
1496 select CPU_MIPSR2_IRQ_VI
1497 select CPU_MIPSR2_IRQ_EI
1499 select NR_CPUS_DEFAULT_8
1501 select SYS_SUPPORTS_SMP
1504 This is a kernel model which is known a SMTC or lately has been
1505 marketesed into SMVP.
1513 bool "SMT (multithreading) scheduler support"
1514 depends on SYS_SUPPORTS_SCHED_SMT
1517 SMT scheduler support improves the CPU scheduler's decision making
1518 when dealing with MIPS MT enabled cores at a cost of slightly
1519 increased overhead in some places. If unsure say N here.
1521 config SYS_SUPPORTS_SCHED_SMT
1525 config SYS_SUPPORTS_MULTITHREADING
1528 config MIPS_MT_FPAFF
1529 bool "Dynamic FPU affinity for FP-intensive threads"
1531 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1533 config MIPS_VPE_LOADER
1534 bool "VPE loader support."
1535 depends on SYS_SUPPORTS_MULTITHREADING
1536 select CPU_MIPSR2_IRQ_VI
1537 select CPU_MIPSR2_IRQ_EI
1540 Includes a loader for loading an elf relocatable object
1541 onto another VPE and running it.
1543 config MIPS_MT_SMTC_IM_BACKSTOP
1544 bool "Use per-TC register bits as backstop for inhibited IM bits"
1545 depends on MIPS_MT_SMTC
1548 To support multiple TC microthreads acting as "CPUs" within
1549 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1550 during interrupt handling. To support legacy drivers and interrupt
1551 controller management code, SMTC has a "backstop" to track and
1552 if necessary restore the interrupt mask. This has some performance
1553 impact on interrupt service overhead.
1555 config MIPS_MT_SMTC_IRQAFF
1556 bool "Support IRQ affinity API"
1557 depends on MIPS_MT_SMTC
1560 Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.)
1561 for SMTC Linux kernel. Requires platform support, of which
1562 an example can be found in the MIPS kernel i8259 and Malta
1563 platform code. Adds some overhead to interrupt dispatch, and
1564 should be used only if you know what you are doing.
1566 config MIPS_VPE_LOADER_TOM
1567 bool "Load VPE program into memory hidden from linux"
1568 depends on MIPS_VPE_LOADER
1571 The loader can use memory that is present but has been hidden from
1572 Linux using the kernel command line option "mem=xxMB". It's up to
1573 you to ensure the amount you put in the option and the space your
1574 program requires is less or equal to the amount physically present.
1576 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1577 config MIPS_VPE_APSP_API
1578 bool "Enable support for AP/SP API (RTLX)"
1579 depends on MIPS_VPE_LOADER
1582 config MIPS_APSP_KSPD
1584 depends on MIPS_VPE_APSP_API
1587 KSPD is a kernel daemon that accepts syscall requests from the SP
1588 side, actions them and returns the results. It also handles the
1589 "exit" syscall notifying other kernel modules the SP program is
1590 exiting. You probably want to say yes here.
1593 bool "MIPS CMP framework support"
1594 depends on SYS_SUPPORTS_MIPS_CMP
1595 select SYNC_R4K if BROKEN
1596 select SYS_SUPPORTS_SMP
1597 select SYS_SUPPORTS_SCHED_SMT if SMP
1598 select WEAK_ORDERING
1601 This is a placeholder option for the GCMP work. It will need to
1602 be handled differently...
1604 config SB1_PASS_1_WORKAROUNDS
1606 depends on CPU_SB1_PASS_1
1609 config SB1_PASS_2_WORKAROUNDS
1611 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1614 config SB1_PASS_2_1_WORKAROUNDS
1616 depends on CPU_SB1 && CPU_SB1_PASS_2
1619 config 64BIT_PHYS_ADDR
1625 config CPU_HAS_SMARTMIPS
1626 depends on SYS_SUPPORTS_SMARTMIPS
1627 bool "Support for the SmartMIPS ASE"
1629 SmartMIPS is a extension of the MIPS32 architecture aimed at
1630 increased security at both hardware and software level for
1631 smartcards. Enabling this option will allow proper use of the
1632 SmartMIPS instructions by Linux applications. However a kernel with
1633 this option will not work on a MIPS core without SmartMIPS core. If
1634 you don't know you probably don't have SmartMIPS and should say N
1641 # Vectored interrupt mode is an R2 feature
1643 config CPU_MIPSR2_IRQ_VI
1647 # Extended interrupt mode is an R2 feature
1649 config CPU_MIPSR2_IRQ_EI
1654 depends on !CPU_R3000
1657 config GENERIC_CLOCKEVENTS_BROADCAST
1663 config CPU_DADDI_WORKAROUNDS
1666 config CPU_R4000_WORKAROUNDS
1668 select CPU_R4400_WORKAROUNDS
1670 config CPU_R4400_WORKAROUNDS
1674 # Use the generic interrupt handling code in kernel/irq/:
1676 config GENERIC_HARDIRQS
1680 config GENERIC_IRQ_PROBE
1688 # - Highmem only makes sense for the 32-bit kernel.
1689 # - The current highmem code will only work properly on physically indexed
1690 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1691 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1692 # moment we protect the user and offer the highmem option only on machines
1693 # where it's known to be safe. This will not offer highmem on a few systems
1694 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1695 # indexed CPUs but we're playing safe.
1696 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1697 # know they might have memory configurations that could make use of highmem
1701 bool "High Memory Support"
1702 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1704 config CPU_SUPPORTS_HIGHMEM
1707 config SYS_SUPPORTS_HIGHMEM
1710 config SYS_SUPPORTS_SMARTMIPS
1713 config ARCH_FLATMEM_ENABLE
1717 config ARCH_DISCONTIGMEM_ENABLE
1719 default y if SGI_IP27
1721 Say Y to support efficient handling of discontiguous physical memory,
1722 for architectures which are either NUMA (Non-Uniform Memory Access)
1723 or have huge holes in the physical address space for other reasons.
1724 See <file:Documentation/vm/numa> for more.
1726 config ARCH_POPULATES_NODE_MAP
1729 config ARCH_SPARSEMEM_ENABLE
1731 select SPARSEMEM_STATIC
1735 depends on SYS_SUPPORTS_NUMA
1737 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1738 Access). This option improves performance on systems with more
1739 than two nodes; on two node systems it is generally better to
1740 leave it disabled; on single node systems disable this option
1743 config SYS_SUPPORTS_NUMA
1749 depends on NEED_MULTIPLE_NODES
1754 bool "Multi-Processing support"
1755 depends on SYS_SUPPORTS_SMP
1757 select USE_GENERIC_SMP_HELPERS
1759 This enables support for systems with more than one CPU. If you have
1760 a system with only one CPU, like most personal computers, say N. If
1761 you have a system with more than one CPU, say Y.
1763 If you say N here, the kernel will run on single and multiprocessor
1764 machines, but will use only one CPU of a multiprocessor machine. If
1765 you say Y here, the kernel will run on many, but not all,
1766 singleprocessor machines. On a singleprocessor machine, the kernel
1767 will run faster if you say N here.
1769 People using multiprocessor machines who say Y here should also say
1770 Y to "Enhanced Real Time Clock Support", below.
1772 See also the SMP-HOWTO available at
1773 <http://www.tldp.org/docs.html#howto>.
1775 If you don't know what to do here, say N.
1780 config SYS_SUPPORTS_MIPS_CMP
1783 config SYS_SUPPORTS_SMP
1786 config NR_CPUS_DEFAULT_1
1789 config NR_CPUS_DEFAULT_2
1792 config NR_CPUS_DEFAULT_4
1795 config NR_CPUS_DEFAULT_8
1798 config NR_CPUS_DEFAULT_16
1801 config NR_CPUS_DEFAULT_32
1804 config NR_CPUS_DEFAULT_64
1808 int "Maximum number of CPUs (2-64)"
1809 range 1 64 if NR_CPUS_DEFAULT_1
1811 default "1" if NR_CPUS_DEFAULT_1
1812 default "2" if NR_CPUS_DEFAULT_2
1813 default "4" if NR_CPUS_DEFAULT_4
1814 default "8" if NR_CPUS_DEFAULT_8
1815 default "16" if NR_CPUS_DEFAULT_16
1816 default "32" if NR_CPUS_DEFAULT_32
1817 default "64" if NR_CPUS_DEFAULT_64
1819 This allows you to specify the maximum number of CPUs which this
1820 kernel will support. The maximum supported value is 32 for 32-bit
1821 kernel and 64 for 64-bit kernels; the minimum value which makes
1822 sense is 1 for Qemu (useful only for kernel debugging purposes)
1823 and 2 for all others.
1825 This is purely to save memory - each supported CPU adds
1826 approximately eight kilobytes to the kernel image. For best
1827 performance should round up your number of processors to the next
1830 source "kernel/time/Kconfig"
1833 # Timer Interrupt Frequency Configuration
1837 prompt "Timer frequency"
1840 Allows the configuration of the timer frequency.
1843 bool "48 HZ" if SYS_SUPPORTS_48HZ || SYS_SUPPORTS_ARBIT_HZ
1846 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1849 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1852 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1855 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1858 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1861 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1865 config SYS_SUPPORTS_48HZ
1868 config SYS_SUPPORTS_100HZ
1871 config SYS_SUPPORTS_128HZ
1874 config SYS_SUPPORTS_250HZ
1877 config SYS_SUPPORTS_256HZ
1880 config SYS_SUPPORTS_1000HZ
1883 config SYS_SUPPORTS_1024HZ
1886 config SYS_SUPPORTS_ARBIT_HZ
1888 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1889 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1890 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1891 !SYS_SUPPORTS_1024HZ
1896 default 100 if HZ_100
1897 default 128 if HZ_128
1898 default 250 if HZ_250
1899 default 256 if HZ_256
1900 default 1000 if HZ_1000
1901 default 1024 if HZ_1024
1903 source "kernel/Kconfig.preempt"
1905 config MIPS_INSANE_LARGE
1906 bool "Support for large 64-bit configurations"
1907 depends on CPU_R10000 && 64BIT
1909 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1910 previous 64-bit processors which only supported 40 bit / 1TB. If you
1911 need processes of more than 1TB virtual address space, say Y here.
1912 This will result in additional memory usage, so it is not
1913 recommended for normal users.
1916 bool "Kexec system call (EXPERIMENTAL)"
1917 depends on EXPERIMENTAL
1919 kexec is a system call that implements the ability to shutdown your
1920 current kernel, and to start another kernel. It is like a reboot
1921 but it is independent of the system firmware. And like a reboot
1922 you can start any kernel with it, not just Linux.
1924 The name comes from the similarity to the exec system call.
1926 It is an ongoing process to be certain the hardware in a machine
1927 is properly shutdown, so do not be surprised if this code does not
1928 initially work for you. It may help to enable device hotplugging
1929 support. As of this writing the exact hardware interface is
1930 strongly in flux, so no good recommendation can be made.
1933 bool "Enable seccomp to safely compute untrusted bytecode"
1937 This kernel feature is useful for number crunching applications
1938 that may need to compute untrusted bytecode during their
1939 execution. By using pipes or other transports made available to
1940 the process as file descriptors supporting the read/write
1941 syscalls, it's possible to isolate those applications in
1942 their own address space using seccomp. Once seccomp is
1943 enabled via /proc/<pid>/seccomp, it cannot be disabled
1944 and the task is only allowed to execute a few safe syscalls
1945 defined by each seccomp mode.
1947 If unsure, say Y. Only embedded should say N here.
1951 config RWSEM_GENERIC_SPINLOCK
1955 config LOCKDEP_SUPPORT
1959 config STACKTRACE_SUPPORT
1963 source "init/Kconfig"
1965 config PROBE_INITRD_HEADER
1966 bool "Probe initrd header created by addinitrd"
1967 depends on BLK_DEV_INITRD
1969 Probe initrd header at the last page of kernel image.
1970 Say Y here if you are using arch/mips/boot/addinitrd.c to
1971 add initrd or initramfs image to the kernel image.
1974 source "kernel/Kconfig.freezer"
1976 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1984 bool "Support for PCI controller"
1985 depends on HW_HAS_PCI
1988 Find out whether you have a PCI motherboard. PCI is the name of a
1989 bus system, i.e. the way the CPU talks to the other stuff inside
1990 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
1996 source "drivers/pci/Kconfig"
1999 # ISA support is now enabled via select. Too many systems still have the one
2000 # or other ISA chip on the board that users don't know about so don't expect
2001 # users to choose the right thing ...
2008 depends on HW_HAS_EISA
2010 select GENERIC_ISA_DMA
2012 The Extended Industry Standard Architecture (EISA) bus was
2013 developed as an open alternative to the IBM MicroChannel bus.
2015 The EISA bus provided some of the features of the IBM MicroChannel
2016 bus while maintaining backward compatibility with cards made for
2017 the older ISA bus. The EISA bus saw limited use between 1988 and
2018 1995 when it was made obsolete by the PCI bus.
2020 Say Y here if you are building a kernel for an EISA-based machine.
2024 source "drivers/eisa/Kconfig"
2027 bool "TURBOchannel support"
2028 depends on MACH_DECSTATION
2030 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
2031 processors. Documentation on writing device drivers for TurboChannel
2033 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
2036 # bool "Access.Bus support"
2049 source "drivers/pcmcia/Kconfig"
2051 source "drivers/pci/hotplug/Kconfig"
2055 menu "Executable file formats"
2057 source "fs/Kconfig.binfmt"
2062 config MIPS32_COMPAT
2063 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
2066 Select this option if you want Linux/MIPS 32-bit binary
2067 compatibility. Since all software available for Linux/MIPS is
2068 currently 32-bit you should say Y here.
2072 depends on MIPS32_COMPAT
2075 config SYSVIPC_COMPAT
2077 depends on COMPAT && SYSVIPC
2081 bool "Kernel support for o32 binaries"
2082 depends on MIPS32_COMPAT
2084 Select this option if you want to run o32 binaries. These are pure
2085 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
2086 existing binaries are in this format.
2091 bool "Kernel support for n32 binaries"
2092 depends on MIPS32_COMPAT
2094 Select this option if you want to run n32 binaries. These are
2095 64-bit binaries using 32-bit quantities for addressing and certain
2096 data that would normally be 64-bit. They are used in special
2103 default y if MIPS32_O32 || MIPS32_N32
2107 menu "Power management options"
2109 config ARCH_SUSPEND_POSSIBLE
2113 source "kernel/power/Kconfig"
2117 source "net/Kconfig"
2119 source "drivers/Kconfig"
2123 source "arch/mips/Kconfig.debug"
2125 source "security/Kconfig"
2127 source "crypto/Kconfig"
2129 source "lib/Kconfig"