4 select HAVE_GENERIC_DMA_COHERENT
8 # Horrible source of confusion. Die, die, die ...
10 select RTC_LIB if !LEMOTE_FULOONG2E
12 mainmenu "Linux/MIPS Kernel Configuration"
14 menu "Machine selection"
24 bool "Alchemy processor based machines"
27 bool "Texas Instruments AR7"
29 select DMA_NONCOHERENT
35 select SYS_HAS_CPU_MIPS32_R1
36 select SYS_HAS_EARLY_PRINTK
37 select SYS_SUPPORTS_32BIT_KERNEL
38 select SYS_SUPPORTS_LITTLE_ENDIAN
43 Support for the Texas Instruments AR7 System-on-a-Chip
44 family: TNETD7100, 7200 and 7300.
47 bool "Basler eXcite smart camera"
56 select SYS_HAS_CPU_RM9000
57 select SYS_SUPPORTS_32BIT_KERNEL
58 select SYS_SUPPORTS_BIG_ENDIAN
60 The eXcite is a smart camera platform manufactured by
61 Basler Vision Technologies AG.
64 bool "BCM47XX based boards"
67 select DMA_NONCOHERENT
70 select SYS_HAS_CPU_MIPS32_R1
71 select SYS_SUPPORTS_32BIT_KERNEL
72 select SYS_SUPPORTS_LITTLE_ENDIAN
74 select SSB_DRIVER_MIPS
75 select SSB_DRIVER_EXTIF
77 select SSB_PCICORE_HOSTMODE if PCI
79 select SYS_HAS_EARLY_PRINTK
82 Support for BCM47XX based boards
85 bool "Broadcom BCM63XX based boards"
88 select DMA_NONCOHERENT
90 select SYS_HAS_CPU_MIPS32_R1
91 select SYS_SUPPORTS_32BIT_KERNEL
92 select SYS_SUPPORTS_BIG_ENDIAN
93 select SYS_HAS_EARLY_PRINTK
95 select ARCH_REQUIRE_GPIOLIB
97 Support for BCM63XX based boards
104 select DMA_NONCOHERENT
110 select PCI_GT64XXX_PCI0
112 select SYS_HAS_CPU_NEVADA
113 select SYS_HAS_EARLY_PRINTK
114 select SYS_SUPPORTS_32BIT_KERNEL
115 select SYS_SUPPORTS_64BIT_KERNEL
116 select SYS_SUPPORTS_LITTLE_ENDIAN
118 config MACH_DECSTATION
125 select CPU_DADDI_WORKAROUNDS if 64BIT
126 select CPU_R4000_WORKAROUNDS if 64BIT
127 select CPU_R4400_WORKAROUNDS if 64BIT
128 select DMA_NONCOHERENT
131 select SYS_HAS_CPU_R3000
132 select SYS_HAS_CPU_R4X00
133 select SYS_SUPPORTS_32BIT_KERNEL
134 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
135 select SYS_SUPPORTS_LITTLE_ENDIAN
136 select SYS_SUPPORTS_128HZ
137 select SYS_SUPPORTS_256HZ
138 select SYS_SUPPORTS_1024HZ
140 This enables support for DEC's MIPS based workstations. For details
141 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
142 DECstation porting pages on <http://decstation.unix-ag.org/>.
144 If you have one of the following DECstation Models you definitely
145 want to choose R4xx0 for the CPU Type:
152 otherwise choose R3000.
155 bool "Jazz family of machines"
158 select ARCH_MAY_HAVE_PC_FDC
161 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
162 select GENERIC_ISA_DMA
167 select SYS_HAS_CPU_R4X00
168 select SYS_SUPPORTS_32BIT_KERNEL
169 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
170 select SYS_SUPPORTS_100HZ
172 This a family of machines based on the MIPS R4030 chipset which was
173 used by several vendors to build RISC/os and Windows NT workstations.
174 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millennium and
175 Olivetti M700-10 workstations.
178 bool "LASAT Networks platforms"
181 select DMA_NONCOHERENT
182 select SYS_HAS_EARLY_PRINTK
185 select PCI_GT64XXX_PCI0
187 select R5000_CPU_SCACHE
188 select SYS_HAS_CPU_R5000
189 select SYS_SUPPORTS_32BIT_KERNEL
190 select SYS_SUPPORTS_64BIT_KERNEL if BROKEN
191 select SYS_SUPPORTS_LITTLE_ENDIAN
194 bool "Loongson family of machines"
196 This enables the support of Loongson family of machines.
198 Loongson is a family of general-purpose MIPS-compatible CPUs.
199 developed at Institute of Computing Technology (ICT),
200 Chinese Academy of Sciences (CAS) in the People's Republic
201 of China. The chief architect is Professor Weiwu Hu.
204 bool "MIPS Malta board"
205 select ARCH_MAY_HAVE_PC_FDC
210 select DMA_NONCOHERENT
211 select GENERIC_ISA_DMA
217 select MIPS_BOARDS_GEN
219 select MIPS_CPU_SCACHE
220 select PCI_GT64XXX_PCI0
223 select SYS_HAS_CPU_MIPS32_R1
224 select SYS_HAS_CPU_MIPS32_R2
225 select SYS_HAS_CPU_MIPS64_R1
226 select SYS_HAS_CPU_NEVADA
227 select SYS_HAS_CPU_RM7000
228 select SYS_HAS_EARLY_PRINTK
229 select SYS_SUPPORTS_32BIT_KERNEL
230 select SYS_SUPPORTS_64BIT_KERNEL
231 select SYS_SUPPORTS_BIG_ENDIAN
232 select SYS_SUPPORTS_LITTLE_ENDIAN
233 select SYS_SUPPORTS_MIPS_CMP
234 select SYS_SUPPORTS_MULTITHREADING
235 select SYS_SUPPORTS_SMARTMIPS
237 This enables support for the MIPS Technologies Malta evaluation
241 bool 'MIPS simulator (MIPSsim)'
244 select DMA_NONCOHERENT
245 select SYS_HAS_EARLY_PRINTK
248 select SYS_HAS_CPU_MIPS32_R1
249 select SYS_HAS_CPU_MIPS32_R2
250 select SYS_HAS_EARLY_PRINTK
251 select SYS_SUPPORTS_32BIT_KERNEL
252 select SYS_SUPPORTS_BIG_ENDIAN
253 select SYS_SUPPORTS_MULTITHREADING
254 select SYS_SUPPORTS_LITTLE_ENDIAN
256 This option enables support for MIPS Technologies MIPSsim software
260 bool "NEC EMMA2RH Mark-eins board"
264 This enables support for the NEC Electronics Mark-eins boards.
267 bool "NEC VR4100 series based machines"
270 select SYS_HAS_CPU_VR41XX
271 select ARCH_REQUIRE_GPIOLIB
274 bool "NXP STB220 board"
277 Support for NXP Semiconductors STB220 Development Board.
284 Support for NXP Semiconductors STB225 Development Board.
287 bool "NXP PNX8550 based JBS board"
289 select SYS_SUPPORTS_LITTLE_ENDIAN
291 config PNX8550_STB810
292 bool "NXP PNX8550 based STB810 board"
294 select SYS_SUPPORTS_LITTLE_ENDIAN
297 bool "PMC-Sierra MSP chipsets"
298 depends on EXPERIMENTAL
299 select DMA_NONCOHERENT
301 select NO_EXCEPT_FILL
303 select SYS_HAS_CPU_MIPS32_R1
304 select SYS_HAS_CPU_MIPS32_R2
305 select SYS_SUPPORTS_32BIT_KERNEL
306 select SYS_SUPPORTS_BIG_ENDIAN
309 select SERIAL_8250_CONSOLE
311 This adds support for the PMC-Sierra family of Multi-Service
312 Processor System-On-A-Chips. These parts include a number
313 of integrated peripherals, interfaces and DSPs in addition to
314 a variety of MIPS cores.
317 bool "PMC-Sierra Yosemite eval board"
326 select SYS_HAS_CPU_RM9000
327 select SYS_HAS_EARLY_PRINTK
328 select SYS_SUPPORTS_32BIT_KERNEL
329 select SYS_SUPPORTS_64BIT_KERNEL
330 select SYS_SUPPORTS_BIG_ENDIAN
331 select SYS_SUPPORTS_HIGHMEM
332 select SYS_SUPPORTS_SMP
334 Yosemite is an evaluation board for the RM9000x2 processor
335 manufactured by PMC-Sierra.
338 bool "SGI IP22 (Indy/Indigo2)"
344 select DEFAULT_SGI_PARTITION
345 select DMA_NONCOHERENT
349 select IP22_CPU_SCACHE
351 select GENERIC_ISA_DMA_SUPPORT_BROKEN
353 select SGI_HAS_INDYDOG
359 select SYS_HAS_CPU_R4X00
360 select SYS_HAS_CPU_R5000
362 # Disable EARLY_PRINTK for now since it leads to overwritten prom
363 # memory during early boot on some machines.
365 # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com
366 # for a more details discussion
368 # select SYS_HAS_EARLY_PRINTK
369 select SYS_SUPPORTS_32BIT_KERNEL
370 select SYS_SUPPORTS_64BIT_KERNEL
371 select SYS_SUPPORTS_BIG_ENDIAN
373 This are the SGI Indy, Challenge S and Indigo2, as well as certain
374 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
375 that runs on these, say Y here.
378 bool "SGI IP27 (Origin200/2000)"
382 select DEFAULT_SGI_PARTITION
384 select SYS_HAS_EARLY_PRINTK
386 select NR_CPUS_DEFAULT_64
387 select SYS_HAS_CPU_R10000
388 select SYS_SUPPORTS_64BIT_KERNEL
389 select SYS_SUPPORTS_BIG_ENDIAN
390 select SYS_SUPPORTS_NUMA
391 select SYS_SUPPORTS_SMP
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
398 bool "SGI IP28 (Indigo2 R10k) (EXPERIMENTAL)"
399 depends on EXPERIMENTAL
405 select DEFAULT_SGI_PARTITION
406 select DMA_NONCOHERENT
407 select GENERIC_ISA_DMA_SUPPORT_BROKEN
413 select SGI_HAS_INDYDOG
419 select SYS_HAS_CPU_R10000
421 # Disable EARLY_PRINTK for now since it leads to overwritten prom
422 # memory during early boot on some machines.
424 # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com
425 # for a more details discussion
427 # select SYS_HAS_EARLY_PRINTK
428 select SYS_SUPPORTS_64BIT_KERNEL
429 select SYS_SUPPORTS_BIG_ENDIAN
431 This is the SGI Indigo2 with R10000 processor. To compile a Linux
432 kernel that runs on these, say Y here.
441 select DMA_NONCOHERENT
444 select R5000_CPU_SCACHE
445 select RM7000_CPU_SCACHE
446 select SYS_HAS_CPU_R5000
447 select SYS_HAS_CPU_R10000 if BROKEN
448 select SYS_HAS_CPU_RM7000
449 select SYS_HAS_CPU_NEVADA
450 select SYS_SUPPORTS_64BIT_KERNEL
451 select SYS_SUPPORTS_BIG_ENDIAN
453 If you want this kernel to run on SGI O2 workstation, say Y here.
456 bool "Sibyte BCM91120C-CRhine"
457 depends on EXPERIMENTAL
460 select SIBYTE_BCM1120
462 select SYS_HAS_CPU_SB1
463 select SYS_SUPPORTS_BIG_ENDIAN
464 select SYS_SUPPORTS_LITTLE_ENDIAN
467 bool "Sibyte BCM91120x-Carmel"
468 depends on EXPERIMENTAL
471 select SIBYTE_BCM1120
473 select SYS_HAS_CPU_SB1
474 select SYS_SUPPORTS_BIG_ENDIAN
475 select SYS_SUPPORTS_LITTLE_ENDIAN
478 bool "Sibyte BCM91125C-CRhone"
479 depends on EXPERIMENTAL
482 select SIBYTE_BCM1125
484 select SYS_HAS_CPU_SB1
485 select SYS_SUPPORTS_BIG_ENDIAN
486 select SYS_SUPPORTS_HIGHMEM
487 select SYS_SUPPORTS_LITTLE_ENDIAN
490 bool "Sibyte BCM91125E-Rhone"
491 depends on EXPERIMENTAL
494 select SIBYTE_BCM1125H
496 select SYS_HAS_CPU_SB1
497 select SYS_SUPPORTS_BIG_ENDIAN
498 select SYS_SUPPORTS_LITTLE_ENDIAN
501 bool "Sibyte BCM91250A-SWARM"
504 select NR_CPUS_DEFAULT_2
507 select SYS_HAS_CPU_SB1
508 select SYS_SUPPORTS_BIG_ENDIAN
509 select SYS_SUPPORTS_HIGHMEM
510 select SYS_SUPPORTS_LITTLE_ENDIAN
511 select ZONE_DMA32 if 64BIT
513 config SIBYTE_LITTLESUR
514 bool "Sibyte BCM91250C2-LittleSur"
515 depends on EXPERIMENTAL
518 select NR_CPUS_DEFAULT_2
521 select SYS_HAS_CPU_SB1
522 select SYS_SUPPORTS_BIG_ENDIAN
523 select SYS_SUPPORTS_HIGHMEM
524 select SYS_SUPPORTS_LITTLE_ENDIAN
526 config SIBYTE_SENTOSA
527 bool "Sibyte BCM91250E-Sentosa"
528 depends on EXPERIMENTAL
531 select NR_CPUS_DEFAULT_2
534 select SYS_HAS_CPU_SB1
535 select SYS_SUPPORTS_BIG_ENDIAN
536 select SYS_SUPPORTS_LITTLE_ENDIAN
539 bool "Sibyte BCM91480B-BigSur"
542 select NR_CPUS_DEFAULT_4
543 select SIBYTE_BCM1x80
545 select SYS_HAS_CPU_SB1
546 select SYS_SUPPORTS_BIG_ENDIAN
547 select SYS_SUPPORTS_HIGHMEM
548 select SYS_SUPPORTS_LITTLE_ENDIAN
549 select ZONE_DMA32 if 64BIT
552 bool "SNI RM200/300/400"
553 select ARC if CPU_LITTLE_ENDIAN
554 select ARC32 if CPU_LITTLE_ENDIAN
555 select SNIPROM if CPU_BIG_ENDIAN
556 select ARCH_MAY_HAVE_PC_FDC
560 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
561 select DMA_NONCOHERENT
562 select GENERIC_ISA_DMA
569 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
570 select SYS_HAS_CPU_R4X00
571 select SYS_HAS_CPU_R5000
572 select SYS_HAS_CPU_R10000
573 select R5000_CPU_SCACHE
574 select SYS_HAS_EARLY_PRINTK
575 select SYS_SUPPORTS_32BIT_KERNEL
576 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
577 select SYS_SUPPORTS_BIG_ENDIAN
578 select SYS_SUPPORTS_HIGHMEM
579 select SYS_SUPPORTS_LITTLE_ENDIAN
581 The SNI RM200/300/400 are MIPS-based machines manufactured by
582 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
583 Technology and now in turn merged with Fujitsu. Say Y here to
584 support this machine type.
587 bool "Toshiba TX39 series based machines"
590 bool "Toshiba TX49 series based machines"
592 config MIKROTIK_RB532
593 bool "Mikrotik RB532 boards"
596 select DMA_NONCOHERENT
599 select SYS_HAS_CPU_MIPS32_R1
600 select SYS_SUPPORTS_32BIT_KERNEL
601 select SYS_SUPPORTS_LITTLE_ENDIAN
604 select ARCH_REQUIRE_GPIOLIB
606 Support the Mikrotik(tm) RouterBoard 532 series,
607 based on the IDT RC32434 SoC.
610 bool "Wind River PPMC board"
615 select DMA_NONCOHERENT
617 select PCI_GT64XXX_PCI0
619 select SYS_HAS_CPU_MIPS32_R1
620 select SYS_HAS_CPU_MIPS32_R2
621 select SYS_HAS_CPU_MIPS64_R1
622 select SYS_HAS_CPU_NEVADA
623 select SYS_HAS_CPU_RM7000
624 select SYS_SUPPORTS_32BIT_KERNEL
625 select SYS_SUPPORTS_64BIT_KERNEL
626 select SYS_SUPPORTS_BIG_ENDIAN
627 select SYS_SUPPORTS_LITTLE_ENDIAN
629 This enables support for the Wind River MIPS32 4KC PPMC evaluation
630 board, which is based on GT64120 bridge chip.
632 config CAVIUM_OCTEON_SIMULATOR
633 bool "Cavium Networks Octeon Simulator"
635 select 64BIT_PHYS_ADDR
637 select SYS_SUPPORTS_64BIT_KERNEL
638 select SYS_SUPPORTS_BIG_ENDIAN
639 select SYS_SUPPORTS_HIGHMEM
640 select SYS_SUPPORTS_HOTPLUG_CPU
641 select SYS_HAS_CPU_CAVIUM_OCTEON
643 The Octeon simulator is software performance model of the Cavium
644 Octeon Processor. It supports simulating Octeon processors on x86
647 config CAVIUM_OCTEON_REFERENCE_BOARD
648 bool "Cavium Networks Octeon reference board"
650 select 64BIT_PHYS_ADDR
652 select SYS_SUPPORTS_64BIT_KERNEL
653 select SYS_SUPPORTS_BIG_ENDIAN
654 select SYS_SUPPORTS_HIGHMEM
655 select SYS_SUPPORTS_HOTPLUG_CPU
656 select SYS_HAS_EARLY_PRINTK
657 select SYS_HAS_CPU_CAVIUM_OCTEON
660 select ARCH_SUPPORTS_MSI
662 This option supports all of the Octeon reference boards from Cavium
663 Networks. It builds a kernel that dynamically determines the Octeon
664 CPU type and supports all known board reference implementations.
665 Some of the supported boards are:
672 Say Y here for most Octeon reference boards.
676 source "arch/mips/alchemy/Kconfig"
677 source "arch/mips/basler/excite/Kconfig"
678 source "arch/mips/bcm63xx/Kconfig"
679 source "arch/mips/jazz/Kconfig"
680 source "arch/mips/lasat/Kconfig"
681 source "arch/mips/pmc-sierra/Kconfig"
682 source "arch/mips/sgi-ip27/Kconfig"
683 source "arch/mips/sibyte/Kconfig"
684 source "arch/mips/txx9/Kconfig"
685 source "arch/mips/vr41xx/Kconfig"
686 source "arch/mips/cavium-octeon/Kconfig"
687 source "arch/mips/loongson/Kconfig"
691 config RWSEM_GENERIC_SPINLOCK
695 config RWSEM_XCHGADD_ALGORITHM
698 config ARCH_HAS_ILOG2_U32
702 config ARCH_HAS_ILOG2_U64
706 config ARCH_SUPPORTS_OPROFILE
708 default y if !MIPS_MT_SMTC
710 config GENERIC_FIND_NEXT_BIT
714 config GENERIC_HWEIGHT
718 config GENERIC_CALIBRATE_DELAY
722 config GENERIC_CLOCKEVENTS
730 config GENERIC_CMOS_UPDATE
734 config SCHED_OMIT_FRAME_POINTER
738 config GENERIC_HARDIRQS_NO__DO_IRQ
742 # Select some configuration options automatically based on user selections.
747 config ARCH_MAY_HAVE_PC_FDC
793 select ARCH_REQUIRE_GPIOLIB
802 config DMA_NONCOHERENT
804 select DMA_NEED_PCI_MAP_STATE
806 config DMA_NEED_PCI_MAP_STATE
810 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
811 depends on SYS_HAS_EARLY_PRINTK
814 This option enables special console drivers which allow the kernel
815 to print messages very early in the bootup process.
817 This is useful for kernel debugging when your machine crashes very
818 early before the console code is initialized. For normal operation,
819 it is not recommended because it looks ugly on some machines and
820 doesn't cooperate with an X server. You should normally say N here,
821 unless you want to debug such a crash.
823 config SYS_HAS_EARLY_PRINTK
827 bool "Support for hot-pluggable CPUs"
828 depends on SMP && HOTPLUG && SYS_SUPPORTS_HOTPLUG_CPU
830 Say Y here to allow turning CPUs off and on. CPUs can be
831 controlled through /sys/devices/system/cpu.
832 (Note: power management support will enable this option
833 automatically on SMP systems. )
834 Say N if you want to disable CPU hotplug.
836 config SYS_SUPPORTS_HOTPLUG_CPU
851 config MIPS_DISABLE_OBSOLETE_IDE
860 config GENERIC_ISA_DMA
862 select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
864 config GENERIC_ISA_DMA_SUPPORT_BROKEN
866 select GENERIC_ISA_DMA
872 # Endianess selection. Sufficiently obscure so many users don't know what to
873 # answer,so we try hard to limit the available choices. Also the use of a
874 # choice statement should be more obvious to the user.
877 prompt "Endianess selection"
879 Some MIPS machines can be configured for either little or big endian
880 byte order. These modes require different kernels and a different
881 Linux distribution. In general there is one preferred byteorder for a
882 particular system but some systems are just as commonly used in the
883 one or the other endianness.
885 config CPU_BIG_ENDIAN
887 depends on SYS_SUPPORTS_BIG_ENDIAN
889 config CPU_LITTLE_ENDIAN
891 depends on SYS_SUPPORTS_LITTLE_ENDIAN
896 config SYS_SUPPORTS_APM_EMULATION
899 config SYS_SUPPORTS_BIG_ENDIAN
902 config SYS_SUPPORTS_LITTLE_ENDIAN
905 config SYS_SUPPORTS_HUGETLBFS
907 depends on CPU_SUPPORTS_HUGEPAGES && 64BIT
934 config IRQ_CPU_OCTEON
937 config MIPS_BOARDS_GEN
940 config PCI_GT64XXX_PCI0
943 config NO_EXCEPT_FILL
954 select DMA_NONCOHERENT
957 select SYS_HAS_CPU_R5500
958 select SYS_SUPPORTS_32BIT_KERNEL
959 select SYS_SUPPORTS_64BIT_KERNEL
960 select SYS_SUPPORTS_BIG_ENDIAN
967 select DMA_NONCOHERENT
968 select SYS_HAS_CPU_MIPS32_R2
969 select SYS_SUPPORTS_32BIT_KERNEL
970 select SYS_SUPPORTS_LITTLE_ENDIAN
971 select SYS_SUPPORTS_BIG_ENDIAN
973 select CPU_MIPSR2_IRQ_VI
985 select DMA_NONCOHERENT
987 select SYS_HAS_CPU_MIPS32_R1
988 select SYS_HAS_EARLY_PRINTK
989 select SYS_SUPPORTS_32BIT_KERNEL
998 config SGI_HAS_INDYDOG
1010 config SGI_HAS_ZILOG
1013 config SGI_HAS_I8042
1016 config DEFAULT_SGI_PARTITION
1028 config MIPS_L1_CACHE_SHIFT
1030 default "4" if MACH_DECSTATION || MIKROTIK_RB532 || PMC_MSP4200_EVAL
1031 default "6" if MIPS_CPU_SCACHE
1032 default "7" if SGI_IP22 || SGI_IP27 || SGI_IP28 || SNI_RM || CPU_CAVIUM_OCTEON
1035 config HAVE_STD_PC_SERIAL_PORT
1039 bool "ARC console support"
1040 depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
1044 depends on MACH_JAZZ || SNI_RM || SGI_IP32
1049 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP28 || SGI_IP32
1058 menu "CPU selection"
1064 config CPU_LOONGSON2E
1066 depends on SYS_HAS_CPU_LOONGSON2E
1067 select CPU_LOONGSON2
1069 The Loongson 2E processor implements the MIPS III instruction set
1070 with many extensions.
1072 config CPU_MIPS32_R1
1073 bool "MIPS32 Release 1"
1074 depends on SYS_HAS_CPU_MIPS32_R1
1075 select CPU_HAS_PREFETCH
1076 select CPU_SUPPORTS_32BIT_KERNEL
1077 select CPU_SUPPORTS_HIGHMEM
1079 Choose this option to build a kernel for release 1 or later of the
1080 MIPS32 architecture. Most modern embedded systems with a 32-bit
1081 MIPS processor are based on a MIPS32 processor. If you know the
1082 specific type of processor in your system, choose those that one
1083 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1084 Release 2 of the MIPS32 architecture is available since several
1085 years so chances are you even have a MIPS32 Release 2 processor
1086 in which case you should choose CPU_MIPS32_R2 instead for better
1089 config CPU_MIPS32_R2
1090 bool "MIPS32 Release 2"
1091 depends on SYS_HAS_CPU_MIPS32_R2
1092 select CPU_HAS_PREFETCH
1093 select CPU_SUPPORTS_32BIT_KERNEL
1094 select CPU_SUPPORTS_HIGHMEM
1096 Choose this option to build a kernel for release 2 or later of the
1097 MIPS32 architecture. Most modern embedded systems with a 32-bit
1098 MIPS processor are based on a MIPS32 processor. If you know the
1099 specific type of processor in your system, choose those that one
1100 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1102 config CPU_MIPS64_R1
1103 bool "MIPS64 Release 1"
1104 depends on SYS_HAS_CPU_MIPS64_R1
1105 select CPU_HAS_PREFETCH
1106 select CPU_SUPPORTS_32BIT_KERNEL
1107 select CPU_SUPPORTS_64BIT_KERNEL
1108 select CPU_SUPPORTS_HIGHMEM
1109 select CPU_SUPPORTS_HUGEPAGES
1111 Choose this option to build a kernel for release 1 or later of the
1112 MIPS64 architecture. Many modern embedded systems with a 64-bit
1113 MIPS processor are based on a MIPS64 processor. If you know the
1114 specific type of processor in your system, choose those that one
1115 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1116 Release 2 of the MIPS64 architecture is available since several
1117 years so chances are you even have a MIPS64 Release 2 processor
1118 in which case you should choose CPU_MIPS64_R2 instead for better
1121 config CPU_MIPS64_R2
1122 bool "MIPS64 Release 2"
1123 depends on SYS_HAS_CPU_MIPS64_R2
1124 select CPU_HAS_PREFETCH
1125 select CPU_SUPPORTS_32BIT_KERNEL
1126 select CPU_SUPPORTS_64BIT_KERNEL
1127 select CPU_SUPPORTS_HIGHMEM
1128 select CPU_SUPPORTS_HUGEPAGES
1130 Choose this option to build a kernel for release 2 or later of the
1131 MIPS64 architecture. Many modern embedded systems with a 64-bit
1132 MIPS processor are based on a MIPS64 processor. If you know the
1133 specific type of processor in your system, choose those that one
1134 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1138 depends on SYS_HAS_CPU_R3000
1140 select CPU_SUPPORTS_32BIT_KERNEL
1141 select CPU_SUPPORTS_HIGHMEM
1143 Please make sure to pick the right CPU type. Linux/MIPS is not
1144 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
1145 *not* work on R4000 machines and vice versa. However, since most
1146 of the supported machines have an R4000 (or similar) CPU, R4x00
1147 might be a safe bet. If the resulting kernel does not work,
1148 try to recompile with R3000.
1152 depends on SYS_HAS_CPU_TX39XX
1153 select CPU_SUPPORTS_32BIT_KERNEL
1157 depends on SYS_HAS_CPU_VR41XX
1158 select CPU_SUPPORTS_32BIT_KERNEL
1159 select CPU_SUPPORTS_64BIT_KERNEL
1161 The options selects support for the NEC VR4100 series of processors.
1162 Only choose this option if you have one of these processors as a
1163 kernel built with this option will not run on any other type of
1164 processor or vice versa.
1168 depends on SYS_HAS_CPU_R4300
1169 select CPU_SUPPORTS_32BIT_KERNEL
1170 select CPU_SUPPORTS_64BIT_KERNEL
1172 MIPS Technologies R4300-series processors.
1176 depends on SYS_HAS_CPU_R4X00
1177 select CPU_SUPPORTS_32BIT_KERNEL
1178 select CPU_SUPPORTS_64BIT_KERNEL
1180 MIPS Technologies R4000-series processors other than 4300, including
1181 the R4000, R4400, R4600, and 4700.
1185 depends on SYS_HAS_CPU_TX49XX
1186 select CPU_HAS_PREFETCH
1187 select CPU_SUPPORTS_32BIT_KERNEL
1188 select CPU_SUPPORTS_64BIT_KERNEL
1192 depends on SYS_HAS_CPU_R5000
1193 select CPU_SUPPORTS_32BIT_KERNEL
1194 select CPU_SUPPORTS_64BIT_KERNEL
1196 MIPS Technologies R5000-series processors other than the Nevada.
1200 depends on SYS_HAS_CPU_R5432
1201 select CPU_SUPPORTS_32BIT_KERNEL
1202 select CPU_SUPPORTS_64BIT_KERNEL
1206 depends on SYS_HAS_CPU_R5500
1207 select CPU_SUPPORTS_32BIT_KERNEL
1208 select CPU_SUPPORTS_64BIT_KERNEL
1209 select CPU_SUPPORTS_HUGEPAGES
1211 NEC VR5500 and VR5500A series processors implement 64-bit MIPS IV
1216 depends on EXPERIMENTAL
1217 depends on SYS_HAS_CPU_R6000
1218 select CPU_SUPPORTS_32BIT_KERNEL
1220 MIPS Technologies R6000 and R6000A series processors. Note these
1221 processors are extremely rare and the support for them is incomplete.
1225 depends on SYS_HAS_CPU_NEVADA
1226 select CPU_SUPPORTS_32BIT_KERNEL
1227 select CPU_SUPPORTS_64BIT_KERNEL
1229 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1233 depends on EXPERIMENTAL
1234 depends on SYS_HAS_CPU_R8000
1235 select CPU_HAS_PREFETCH
1236 select CPU_SUPPORTS_64BIT_KERNEL
1238 MIPS Technologies R8000 processors. Note these processors are
1239 uncommon and the support for them is incomplete.
1243 depends on SYS_HAS_CPU_R10000
1244 select CPU_HAS_PREFETCH
1245 select CPU_SUPPORTS_32BIT_KERNEL
1246 select CPU_SUPPORTS_64BIT_KERNEL
1247 select CPU_SUPPORTS_HIGHMEM
1249 MIPS Technologies R10000-series processors.
1253 depends on SYS_HAS_CPU_RM7000
1254 select CPU_HAS_PREFETCH
1255 select CPU_SUPPORTS_32BIT_KERNEL
1256 select CPU_SUPPORTS_64BIT_KERNEL
1257 select CPU_SUPPORTS_HIGHMEM
1261 depends on SYS_HAS_CPU_RM9000
1262 select CPU_HAS_PREFETCH
1263 select CPU_SUPPORTS_32BIT_KERNEL
1264 select CPU_SUPPORTS_64BIT_KERNEL
1265 select CPU_SUPPORTS_HIGHMEM
1266 select WEAK_ORDERING
1270 depends on SYS_HAS_CPU_SB1
1271 select CPU_SUPPORTS_32BIT_KERNEL
1272 select CPU_SUPPORTS_64BIT_KERNEL
1273 select CPU_SUPPORTS_HIGHMEM
1274 select WEAK_ORDERING
1276 config CPU_CAVIUM_OCTEON
1277 bool "Cavium Octeon processor"
1278 depends on SYS_HAS_CPU_CAVIUM_OCTEON
1280 select IRQ_CPU_OCTEON
1281 select CPU_HAS_PREFETCH
1282 select CPU_SUPPORTS_64BIT_KERNEL
1283 select SYS_SUPPORTS_SMP
1284 select NR_CPUS_DEFAULT_16
1285 select WEAK_ORDERING
1286 select WEAK_REORDERING_BEYOND_LLSC
1287 select CPU_SUPPORTS_HIGHMEM
1288 select CPU_SUPPORTS_HUGEPAGES
1290 The Cavium Octeon processor is a highly integrated chip containing
1291 many ethernet hardware widgets for networking tasks. The processor
1292 can have up to 16 Mips64v2 cores and 8 integrated gigabit ethernets.
1293 Full details can be found at http://www.caviumnetworks.com.
1297 config CPU_LOONGSON2
1299 select CPU_SUPPORTS_32BIT_KERNEL
1300 select CPU_SUPPORTS_64BIT_KERNEL
1301 select CPU_SUPPORTS_HIGHMEM
1303 config SYS_HAS_CPU_LOONGSON2E
1306 config SYS_HAS_CPU_MIPS32_R1
1309 config SYS_HAS_CPU_MIPS32_R2
1312 config SYS_HAS_CPU_MIPS64_R1
1315 config SYS_HAS_CPU_MIPS64_R2
1318 config SYS_HAS_CPU_R3000
1321 config SYS_HAS_CPU_TX39XX
1324 config SYS_HAS_CPU_VR41XX
1327 config SYS_HAS_CPU_R4300
1330 config SYS_HAS_CPU_R4X00
1333 config SYS_HAS_CPU_TX49XX
1336 config SYS_HAS_CPU_R5000
1339 config SYS_HAS_CPU_R5432
1342 config SYS_HAS_CPU_R5500
1345 config SYS_HAS_CPU_R6000
1348 config SYS_HAS_CPU_NEVADA
1351 config SYS_HAS_CPU_R8000
1354 config SYS_HAS_CPU_R10000
1357 config SYS_HAS_CPU_RM7000
1360 config SYS_HAS_CPU_RM9000
1363 config SYS_HAS_CPU_SB1
1366 config SYS_HAS_CPU_CAVIUM_OCTEON
1370 # CPU may reorder R->R, R->W, W->R, W->W
1371 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1373 config WEAK_ORDERING
1377 # CPU may reorder reads and writes beyond LL/SC
1378 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1380 config WEAK_REORDERING_BEYOND_LLSC
1385 # These two indicate any level of the MIPS32 and MIPS64 architecture
1389 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1393 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1396 # These two indicate the revision of the architecture, either Release 1 or Release 2
1400 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1404 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_CAVIUM_OCTEON
1406 config SYS_SUPPORTS_32BIT_KERNEL
1408 config SYS_SUPPORTS_64BIT_KERNEL
1410 config CPU_SUPPORTS_32BIT_KERNEL
1412 config CPU_SUPPORTS_64BIT_KERNEL
1414 config CPU_SUPPORTS_HUGEPAGES
1418 # Set to y for ptrace access to watch registers.
1420 config HARDWARE_WATCHPOINTS
1422 default y if CPU_MIPSR1 || CPU_MIPSR2
1428 prompt "Kernel code model"
1430 You should only select this option if you have a workload that
1431 actually benefits from 64-bit processing or if your machine has
1432 large memory. You will only be presented a single option in this
1433 menu if your system does not support both 32-bit and 64-bit kernels.
1436 bool "32-bit kernel"
1437 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1440 Select this option if you want to build a 32-bit kernel.
1442 bool "64-bit kernel"
1443 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1444 select HAVE_SYSCALL_WRAPPERS
1446 Select this option if you want to build a 64-bit kernel.
1451 prompt "Kernel page size"
1452 default PAGE_SIZE_4KB
1454 config PAGE_SIZE_4KB
1457 This option select the standard 4kB Linux page size. On some
1458 R3000-family processors this is the only available page size. Using
1459 4kB page size will minimize memory consumption and is therefore
1460 recommended for low memory systems.
1462 config PAGE_SIZE_8KB
1464 depends on (EXPERIMENTAL && CPU_R8000) || CPU_CAVIUM_OCTEON
1466 Using 8kB page size will result in higher performance kernel at
1467 the price of higher memory consumption. This option is available
1468 only on R8000 and cnMIPS processors. Note that you will need a
1469 suitable Linux distribution to support this.
1471 config PAGE_SIZE_16KB
1473 depends on !CPU_R3000 && !CPU_TX39XX
1475 Using 16kB page size will result in higher performance kernel at
1476 the price of higher memory consumption. This option is available on
1477 all non-R3000 family processors. Note that you will need a suitable
1478 Linux distribution to support this.
1480 config PAGE_SIZE_32KB
1482 depends on CPU_CAVIUM_OCTEON
1484 Using 32kB page size will result in higher performance kernel at
1485 the price of higher memory consumption. This option is available
1486 only on cnMIPS cores. Note that you will need a suitable Linux
1487 distribution to support this.
1489 config PAGE_SIZE_64KB
1491 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1493 Using 64kB page size will result in higher performance kernel at
1494 the price of higher memory consumption. This option is available on
1495 all non-R3000 family processor. Not that at the time of this
1496 writing this option is still high experimental.
1503 config IP22_CPU_SCACHE
1508 # Support for a MIPS32 / MIPS64 style S-caches
1510 config MIPS_CPU_SCACHE
1514 config R5000_CPU_SCACHE
1518 config RM7000_CPU_SCACHE
1522 config SIBYTE_DMA_PAGEOPS
1523 bool "Use DMA to clear/copy pages"
1526 Instead of using the CPU to zero and copy pages, use a Data Mover
1527 channel. These DMA channels are otherwise unused by the standard
1528 SiByte Linux port. Seems to give a small performance benefit.
1530 config CPU_HAS_PREFETCH
1534 prompt "MIPS MT options"
1536 config MIPS_MT_DISABLED
1537 bool "Disable multithreading support."
1539 Use this option if your workload can't take advantage of
1540 MIPS hardware multithreading support. On systems that don't have
1541 the option of an MT-enabled processor this option will be the only
1542 option in this menu.
1545 bool "Use 1 TC on each available VPE for SMP"
1546 depends on SYS_SUPPORTS_MULTITHREADING
1547 select CPU_MIPSR2_IRQ_VI
1548 select CPU_MIPSR2_IRQ_EI
1550 select NR_CPUS_DEFAULT_2
1552 select SYS_SUPPORTS_SCHED_SMT if SMP
1553 select SYS_SUPPORTS_SMP
1556 This is a kernel model which is also known a VSMP or lately
1557 has been marketesed into SMVP.
1560 bool "SMTC: Use all TCs on all VPEs for SMP"
1561 depends on CPU_MIPS32_R2
1562 #depends on CPU_MIPS64_R2 # once there is hardware ...
1563 depends on SYS_SUPPORTS_MULTITHREADING
1564 select CPU_MIPSR2_IRQ_VI
1565 select CPU_MIPSR2_IRQ_EI
1567 select NR_CPUS_DEFAULT_8
1569 select SYS_SUPPORTS_SMP
1572 This is a kernel model which is known a SMTC or lately has been
1573 marketesed into SMVP.
1581 bool "SMT (multithreading) scheduler support"
1582 depends on SYS_SUPPORTS_SCHED_SMT
1585 SMT scheduler support improves the CPU scheduler's decision making
1586 when dealing with MIPS MT enabled cores at a cost of slightly
1587 increased overhead in some places. If unsure say N here.
1589 config SYS_SUPPORTS_SCHED_SMT
1593 config SYS_SUPPORTS_MULTITHREADING
1596 config MIPS_MT_FPAFF
1597 bool "Dynamic FPU affinity for FP-intensive threads"
1599 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1601 config MIPS_VPE_LOADER
1602 bool "VPE loader support."
1603 depends on SYS_SUPPORTS_MULTITHREADING
1604 select CPU_MIPSR2_IRQ_VI
1605 select CPU_MIPSR2_IRQ_EI
1608 Includes a loader for loading an elf relocatable object
1609 onto another VPE and running it.
1611 config MIPS_MT_SMTC_IM_BACKSTOP
1612 bool "Use per-TC register bits as backstop for inhibited IM bits"
1613 depends on MIPS_MT_SMTC
1616 To support multiple TC microthreads acting as "CPUs" within
1617 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1618 during interrupt handling. To support legacy drivers and interrupt
1619 controller management code, SMTC has a "backstop" to track and
1620 if necessary restore the interrupt mask. This has some performance
1621 impact on interrupt service overhead.
1623 config MIPS_MT_SMTC_IRQAFF
1624 bool "Support IRQ affinity API"
1625 depends on MIPS_MT_SMTC
1628 Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.)
1629 for SMTC Linux kernel. Requires platform support, of which
1630 an example can be found in the MIPS kernel i8259 and Malta
1631 platform code. Adds some overhead to interrupt dispatch, and
1632 should be used only if you know what you are doing.
1634 config MIPS_VPE_LOADER_TOM
1635 bool "Load VPE program into memory hidden from linux"
1636 depends on MIPS_VPE_LOADER
1639 The loader can use memory that is present but has been hidden from
1640 Linux using the kernel command line option "mem=xxMB". It's up to
1641 you to ensure the amount you put in the option and the space your
1642 program requires is less or equal to the amount physically present.
1644 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1645 config MIPS_VPE_APSP_API
1646 bool "Enable support for AP/SP API (RTLX)"
1647 depends on MIPS_VPE_LOADER
1650 config MIPS_APSP_KSPD
1652 depends on MIPS_VPE_APSP_API
1655 KSPD is a kernel daemon that accepts syscall requests from the SP
1656 side, actions them and returns the results. It also handles the
1657 "exit" syscall notifying other kernel modules the SP program is
1658 exiting. You probably want to say yes here.
1661 bool "MIPS CMP framework support"
1662 depends on SYS_SUPPORTS_MIPS_CMP
1664 select SYS_SUPPORTS_SMP
1665 select SYS_SUPPORTS_SCHED_SMT if SMP
1666 select WEAK_ORDERING
1669 This is a placeholder option for the GCMP work. It will need to
1670 be handled differently...
1672 config SB1_PASS_1_WORKAROUNDS
1674 depends on CPU_SB1_PASS_1
1677 config SB1_PASS_2_WORKAROUNDS
1679 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1682 config SB1_PASS_2_1_WORKAROUNDS
1684 depends on CPU_SB1 && CPU_SB1_PASS_2
1687 config 64BIT_PHYS_ADDR
1690 config CPU_HAS_SMARTMIPS
1691 depends on SYS_SUPPORTS_SMARTMIPS
1692 bool "Support for the SmartMIPS ASE"
1694 SmartMIPS is a extension of the MIPS32 architecture aimed at
1695 increased security at both hardware and software level for
1696 smartcards. Enabling this option will allow proper use of the
1697 SmartMIPS instructions by Linux applications. However a kernel with
1698 this option will not work on a MIPS core without SmartMIPS core. If
1699 you don't know you probably don't have SmartMIPS and should say N
1706 # Vectored interrupt mode is an R2 feature
1708 config CPU_MIPSR2_IRQ_VI
1712 # Extended interrupt mode is an R2 feature
1714 config CPU_MIPSR2_IRQ_EI
1719 depends on !CPU_R3000
1722 config GENERIC_CLOCKEVENTS_BROADCAST
1728 config CPU_DADDI_WORKAROUNDS
1731 config CPU_R4000_WORKAROUNDS
1733 select CPU_R4400_WORKAROUNDS
1735 config CPU_R4400_WORKAROUNDS
1739 # Use the generic interrupt handling code in kernel/irq/:
1741 config GENERIC_HARDIRQS
1745 config GENERIC_IRQ_PROBE
1753 # - Highmem only makes sense for the 32-bit kernel.
1754 # - The current highmem code will only work properly on physically indexed
1755 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1756 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1757 # moment we protect the user and offer the highmem option only on machines
1758 # where it's known to be safe. This will not offer highmem on a few systems
1759 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1760 # indexed CPUs but we're playing safe.
1761 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1762 # know they might have memory configurations that could make use of highmem
1766 bool "High Memory Support"
1767 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1769 config CPU_SUPPORTS_HIGHMEM
1772 config SYS_SUPPORTS_HIGHMEM
1775 config SYS_SUPPORTS_SMARTMIPS
1778 config ARCH_FLATMEM_ENABLE
1782 config ARCH_DISCONTIGMEM_ENABLE
1784 default y if SGI_IP27
1786 Say Y to support efficient handling of discontiguous physical memory,
1787 for architectures which are either NUMA (Non-Uniform Memory Access)
1788 or have huge holes in the physical address space for other reasons.
1789 See <file:Documentation/vm/numa> for more.
1791 config ARCH_POPULATES_NODE_MAP
1794 config ARCH_SPARSEMEM_ENABLE
1796 select SPARSEMEM_STATIC
1800 depends on SYS_SUPPORTS_NUMA
1802 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1803 Access). This option improves performance on systems with more
1804 than two nodes; on two node systems it is generally better to
1805 leave it disabled; on single node systems disable this option
1808 config SYS_SUPPORTS_NUMA
1814 depends on NEED_MULTIPLE_NODES
1819 bool "Multi-Processing support"
1820 depends on SYS_SUPPORTS_SMP
1822 select USE_GENERIC_SMP_HELPERS
1824 This enables support for systems with more than one CPU. If you have
1825 a system with only one CPU, like most personal computers, say N. If
1826 you have a system with more than one CPU, say Y.
1828 If you say N here, the kernel will run on single and multiprocessor
1829 machines, but will use only one CPU of a multiprocessor machine. If
1830 you say Y here, the kernel will run on many, but not all,
1831 singleprocessor machines. On a singleprocessor machine, the kernel
1832 will run faster if you say N here.
1834 People using multiprocessor machines who say Y here should also say
1835 Y to "Enhanced Real Time Clock Support", below.
1837 See also the SMP-HOWTO available at
1838 <http://www.tldp.org/docs.html#howto>.
1840 If you don't know what to do here, say N.
1845 config SYS_SUPPORTS_MIPS_CMP
1848 config SYS_SUPPORTS_SMP
1851 config NR_CPUS_DEFAULT_1
1854 config NR_CPUS_DEFAULT_2
1857 config NR_CPUS_DEFAULT_4
1860 config NR_CPUS_DEFAULT_8
1863 config NR_CPUS_DEFAULT_16
1866 config NR_CPUS_DEFAULT_32
1869 config NR_CPUS_DEFAULT_64
1873 int "Maximum number of CPUs (2-64)"
1874 range 1 64 if NR_CPUS_DEFAULT_1
1876 default "1" if NR_CPUS_DEFAULT_1
1877 default "2" if NR_CPUS_DEFAULT_2
1878 default "4" if NR_CPUS_DEFAULT_4
1879 default "8" if NR_CPUS_DEFAULT_8
1880 default "16" if NR_CPUS_DEFAULT_16
1881 default "32" if NR_CPUS_DEFAULT_32
1882 default "64" if NR_CPUS_DEFAULT_64
1884 This allows you to specify the maximum number of CPUs which this
1885 kernel will support. The maximum supported value is 32 for 32-bit
1886 kernel and 64 for 64-bit kernels; the minimum value which makes
1887 sense is 1 for Qemu (useful only for kernel debugging purposes)
1888 and 2 for all others.
1890 This is purely to save memory - each supported CPU adds
1891 approximately eight kilobytes to the kernel image. For best
1892 performance should round up your number of processors to the next
1895 source "kernel/time/Kconfig"
1898 # Timer Interrupt Frequency Configuration
1902 prompt "Timer frequency"
1905 Allows the configuration of the timer frequency.
1908 bool "48 HZ" if SYS_SUPPORTS_48HZ || SYS_SUPPORTS_ARBIT_HZ
1911 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1914 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1917 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1920 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1923 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1926 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1930 config SYS_SUPPORTS_48HZ
1933 config SYS_SUPPORTS_100HZ
1936 config SYS_SUPPORTS_128HZ
1939 config SYS_SUPPORTS_250HZ
1942 config SYS_SUPPORTS_256HZ
1945 config SYS_SUPPORTS_1000HZ
1948 config SYS_SUPPORTS_1024HZ
1951 config SYS_SUPPORTS_ARBIT_HZ
1953 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1954 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1955 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1956 !SYS_SUPPORTS_1024HZ
1961 default 100 if HZ_100
1962 default 128 if HZ_128
1963 default 250 if HZ_250
1964 default 256 if HZ_256
1965 default 1000 if HZ_1000
1966 default 1024 if HZ_1024
1968 source "kernel/Kconfig.preempt"
1970 config MIPS_INSANE_LARGE
1971 bool "Support for large 64-bit configurations"
1972 depends on CPU_R10000 && 64BIT
1974 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1975 previous 64-bit processors which only supported 40 bit / 1TB. If you
1976 need processes of more than 1TB virtual address space, say Y here.
1977 This will result in additional memory usage, so it is not
1978 recommended for normal users.
1981 bool "Kexec system call (EXPERIMENTAL)"
1982 depends on EXPERIMENTAL
1984 kexec is a system call that implements the ability to shutdown your
1985 current kernel, and to start another kernel. It is like a reboot
1986 but it is independent of the system firmware. And like a reboot
1987 you can start any kernel with it, not just Linux.
1989 The name comes from the similarity to the exec system call.
1991 It is an ongoing process to be certain the hardware in a machine
1992 is properly shutdown, so do not be surprised if this code does not
1993 initially work for you. It may help to enable device hotplugging
1994 support. As of this writing the exact hardware interface is
1995 strongly in flux, so no good recommendation can be made.
1998 bool "Enable seccomp to safely compute untrusted bytecode"
2002 This kernel feature is useful for number crunching applications
2003 that may need to compute untrusted bytecode during their
2004 execution. By using pipes or other transports made available to
2005 the process as file descriptors supporting the read/write
2006 syscalls, it's possible to isolate those applications in
2007 their own address space using seccomp. Once seccomp is
2008 enabled via /proc/<pid>/seccomp, it cannot be disabled
2009 and the task is only allowed to execute a few safe syscalls
2010 defined by each seccomp mode.
2012 If unsure, say Y. Only embedded should say N here.
2016 config LOCKDEP_SUPPORT
2020 config STACKTRACE_SUPPORT
2024 source "init/Kconfig"
2026 config PROBE_INITRD_HEADER
2027 bool "Probe initrd header created by addinitrd"
2028 depends on BLK_DEV_INITRD
2030 Probe initrd header at the last page of kernel image.
2031 Say Y here if you are using arch/mips/boot/addinitrd.c to
2032 add initrd or initramfs image to the kernel image.
2035 source "kernel/Kconfig.freezer"
2037 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
2045 bool "Support for PCI controller"
2046 depends on HW_HAS_PCI
2049 Find out whether you have a PCI motherboard. PCI is the name of a
2050 bus system, i.e. the way the CPU talks to the other stuff inside
2051 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
2057 source "drivers/pci/Kconfig"
2060 # ISA support is now enabled via select. Too many systems still have the one
2061 # or other ISA chip on the board that users don't know about so don't expect
2062 # users to choose the right thing ...
2069 depends on HW_HAS_EISA
2071 select GENERIC_ISA_DMA
2073 The Extended Industry Standard Architecture (EISA) bus was
2074 developed as an open alternative to the IBM MicroChannel bus.
2076 The EISA bus provided some of the features of the IBM MicroChannel
2077 bus while maintaining backward compatibility with cards made for
2078 the older ISA bus. The EISA bus saw limited use between 1988 and
2079 1995 when it was made obsolete by the PCI bus.
2081 Say Y here if you are building a kernel for an EISA-based machine.
2085 source "drivers/eisa/Kconfig"
2088 bool "TURBOchannel support"
2089 depends on MACH_DECSTATION
2091 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
2092 processors. Documentation on writing device drivers for TurboChannel
2094 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
2097 # bool "Access.Bus support"
2110 source "drivers/pcmcia/Kconfig"
2112 source "drivers/pci/hotplug/Kconfig"
2116 menu "Executable file formats"
2118 source "fs/Kconfig.binfmt"
2123 config MIPS32_COMPAT
2124 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
2127 Select this option if you want Linux/MIPS 32-bit binary
2128 compatibility. Since all software available for Linux/MIPS is
2129 currently 32-bit you should say Y here.
2133 depends on MIPS32_COMPAT
2136 config SYSVIPC_COMPAT
2138 depends on COMPAT && SYSVIPC
2142 bool "Kernel support for o32 binaries"
2143 depends on MIPS32_COMPAT
2145 Select this option if you want to run o32 binaries. These are pure
2146 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
2147 existing binaries are in this format.
2152 bool "Kernel support for n32 binaries"
2153 depends on MIPS32_COMPAT
2155 Select this option if you want to run n32 binaries. These are
2156 64-bit binaries using 32-bit quantities for addressing and certain
2157 data that would normally be 64-bit. They are used in special
2164 default y if MIPS32_O32 || MIPS32_N32
2168 menu "Power management options"
2170 config ARCH_HIBERNATION_POSSIBLE
2172 depends on SYS_SUPPORTS_HOTPLUG_CPU || !SMP
2174 config ARCH_SUSPEND_POSSIBLE
2176 depends on SYS_SUPPORTS_HOTPLUG_CPU || !SMP
2178 source "kernel/power/Kconfig"
2182 source "net/Kconfig"
2184 source "drivers/Kconfig"
2188 source "arch/mips/Kconfig.debug"
2190 source "security/Kconfig"
2192 source "crypto/Kconfig"
2194 source "lib/Kconfig"