4 select HAVE_GENERIC_DMA_COHERENT
8 # Horrible source of confusion. Die, die, die ...
10 select RTC_LIB if !MACH_LOONGSON
12 mainmenu "Linux/MIPS Kernel Configuration"
14 menu "Machine selection"
24 bool "Alchemy processor based machines"
25 select SYS_SUPPORTS_ZBOOT
28 bool "Texas Instruments AR7"
30 select DMA_NONCOHERENT
36 select SYS_HAS_CPU_MIPS32_R1
37 select SYS_HAS_EARLY_PRINTK
38 select SYS_SUPPORTS_32BIT_KERNEL
39 select SYS_SUPPORTS_LITTLE_ENDIAN
40 select SYS_SUPPORTS_ZBOOT_UART16550
45 Support for the Texas Instruments AR7 System-on-a-Chip
46 family: TNETD7100, 7200 and 7300.
49 bool "Basler eXcite smart camera"
58 select SYS_HAS_CPU_RM9000
59 select SYS_SUPPORTS_32BIT_KERNEL
60 select SYS_SUPPORTS_BIG_ENDIAN
62 The eXcite is a smart camera platform manufactured by
63 Basler Vision Technologies AG.
66 bool "BCM47XX based boards"
69 select DMA_NONCOHERENT
72 select SYS_HAS_CPU_MIPS32_R1
73 select SYS_SUPPORTS_32BIT_KERNEL
74 select SYS_SUPPORTS_LITTLE_ENDIAN
76 select SSB_DRIVER_MIPS
77 select SSB_DRIVER_EXTIF
79 select SSB_PCICORE_HOSTMODE if PCI
81 select SYS_HAS_EARLY_PRINTK
84 Support for BCM47XX based boards
87 bool "Broadcom BCM63XX based boards"
90 select DMA_NONCOHERENT
92 select SYS_HAS_CPU_MIPS32_R1
93 select SYS_SUPPORTS_32BIT_KERNEL
94 select SYS_SUPPORTS_BIG_ENDIAN
95 select SYS_HAS_EARLY_PRINTK
97 select ARCH_REQUIRE_GPIOLIB
99 Support for BCM63XX based boards
106 select DMA_NONCOHERENT
112 select PCI_GT64XXX_PCI0
114 select SYS_HAS_CPU_NEVADA
115 select SYS_HAS_EARLY_PRINTK
116 select SYS_SUPPORTS_32BIT_KERNEL
117 select SYS_SUPPORTS_64BIT_KERNEL
118 select SYS_SUPPORTS_LITTLE_ENDIAN
120 config MACH_DECSTATION
127 select CPU_DADDI_WORKAROUNDS if 64BIT
128 select CPU_R4000_WORKAROUNDS if 64BIT
129 select CPU_R4400_WORKAROUNDS if 64BIT
130 select DMA_NONCOHERENT
133 select SYS_HAS_CPU_R3000
134 select SYS_HAS_CPU_R4X00
135 select SYS_SUPPORTS_32BIT_KERNEL
136 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
137 select SYS_SUPPORTS_LITTLE_ENDIAN
138 select SYS_SUPPORTS_128HZ
139 select SYS_SUPPORTS_256HZ
140 select SYS_SUPPORTS_1024HZ
142 This enables support for DEC's MIPS based workstations. For details
143 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
144 DECstation porting pages on <http://decstation.unix-ag.org/>.
146 If you have one of the following DECstation Models you definitely
147 want to choose R4xx0 for the CPU Type:
154 otherwise choose R3000.
157 bool "Jazz family of machines"
160 select ARCH_MAY_HAVE_PC_FDC
163 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
164 select GENERIC_ISA_DMA
169 select SYS_HAS_CPU_R4X00
170 select SYS_SUPPORTS_32BIT_KERNEL
171 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
172 select SYS_SUPPORTS_100HZ
174 This a family of machines based on the MIPS R4030 chipset which was
175 used by several vendors to build RISC/os and Windows NT workstations.
176 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millennium and
177 Olivetti M700-10 workstations.
180 bool "LASAT Networks platforms"
183 select DMA_NONCOHERENT
184 select SYS_HAS_EARLY_PRINTK
187 select PCI_GT64XXX_PCI0
189 select R5000_CPU_SCACHE
190 select SYS_HAS_CPU_R5000
191 select SYS_SUPPORTS_32BIT_KERNEL
192 select SYS_SUPPORTS_64BIT_KERNEL if BROKEN
193 select SYS_SUPPORTS_LITTLE_ENDIAN
196 bool "Loongson family of machines"
197 select SYS_SUPPORTS_ZBOOT_UART16550
199 This enables the support of Loongson family of machines.
201 Loongson is a family of general-purpose MIPS-compatible CPUs.
202 developed at Institute of Computing Technology (ICT),
203 Chinese Academy of Sciences (CAS) in the People's Republic
204 of China. The chief architect is Professor Weiwu Hu.
207 bool "MIPS Malta board"
208 select ARCH_MAY_HAVE_PC_FDC
213 select DMA_NONCOHERENT
214 select GENERIC_ISA_DMA
220 select MIPS_BOARDS_GEN
222 select MIPS_CPU_SCACHE
223 select PCI_GT64XXX_PCI0
226 select SYS_HAS_CPU_MIPS32_R1
227 select SYS_HAS_CPU_MIPS32_R2
228 select SYS_HAS_CPU_MIPS64_R1
229 select SYS_HAS_CPU_NEVADA
230 select SYS_HAS_CPU_RM7000
231 select SYS_HAS_EARLY_PRINTK
232 select SYS_SUPPORTS_32BIT_KERNEL
233 select SYS_SUPPORTS_64BIT_KERNEL
234 select SYS_SUPPORTS_BIG_ENDIAN
235 select SYS_SUPPORTS_LITTLE_ENDIAN
236 select SYS_SUPPORTS_MIPS_CMP
237 select SYS_SUPPORTS_MULTITHREADING
238 select SYS_SUPPORTS_SMARTMIPS
239 select SYS_SUPPORTS_ZBOOT
241 This enables support for the MIPS Technologies Malta evaluation
245 bool 'MIPS simulator (MIPSsim)'
248 select DMA_NONCOHERENT
249 select SYS_HAS_EARLY_PRINTK
252 select SYS_HAS_CPU_MIPS32_R1
253 select SYS_HAS_CPU_MIPS32_R2
254 select SYS_HAS_EARLY_PRINTK
255 select SYS_SUPPORTS_32BIT_KERNEL
256 select SYS_SUPPORTS_BIG_ENDIAN
257 select SYS_SUPPORTS_MULTITHREADING
258 select SYS_SUPPORTS_LITTLE_ENDIAN
260 This option enables support for MIPS Technologies MIPSsim software
264 bool "NEC EMMA2RH Mark-eins board"
268 This enables support for the NEC Electronics Mark-eins boards.
271 bool "NEC VR4100 series based machines"
274 select SYS_HAS_CPU_VR41XX
275 select ARCH_REQUIRE_GPIOLIB
278 bool "NXP STB220 board"
281 Support for NXP Semiconductors STB220 Development Board.
288 Support for NXP Semiconductors STB225 Development Board.
291 bool "NXP PNX8550 based JBS board"
293 select SYS_SUPPORTS_LITTLE_ENDIAN
295 config PNX8550_STB810
296 bool "NXP PNX8550 based STB810 board"
298 select SYS_SUPPORTS_LITTLE_ENDIAN
301 bool "PMC-Sierra MSP chipsets"
302 depends on EXPERIMENTAL
303 select DMA_NONCOHERENT
305 select NO_EXCEPT_FILL
307 select SYS_HAS_CPU_MIPS32_R1
308 select SYS_HAS_CPU_MIPS32_R2
309 select SYS_SUPPORTS_32BIT_KERNEL
310 select SYS_SUPPORTS_BIG_ENDIAN
313 select SERIAL_8250_CONSOLE
315 This adds support for the PMC-Sierra family of Multi-Service
316 Processor System-On-A-Chips. These parts include a number
317 of integrated peripherals, interfaces and DSPs in addition to
318 a variety of MIPS cores.
321 bool "PMC-Sierra Yosemite eval board"
330 select SYS_HAS_CPU_RM9000
331 select SYS_HAS_EARLY_PRINTK
332 select SYS_SUPPORTS_32BIT_KERNEL
333 select SYS_SUPPORTS_64BIT_KERNEL
334 select SYS_SUPPORTS_BIG_ENDIAN
335 select SYS_SUPPORTS_HIGHMEM
336 select SYS_SUPPORTS_SMP
338 Yosemite is an evaluation board for the RM9000x2 processor
339 manufactured by PMC-Sierra.
342 bool "SGI IP22 (Indy/Indigo2)"
348 select DEFAULT_SGI_PARTITION
349 select DMA_NONCOHERENT
353 select IP22_CPU_SCACHE
355 select GENERIC_ISA_DMA_SUPPORT_BROKEN
357 select SGI_HAS_INDYDOG
363 select SYS_HAS_CPU_R4X00
364 select SYS_HAS_CPU_R5000
366 # Disable EARLY_PRINTK for now since it leads to overwritten prom
367 # memory during early boot on some machines.
369 # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com
370 # for a more details discussion
372 # select SYS_HAS_EARLY_PRINTK
373 select SYS_SUPPORTS_32BIT_KERNEL
374 select SYS_SUPPORTS_64BIT_KERNEL
375 select SYS_SUPPORTS_BIG_ENDIAN
377 This are the SGI Indy, Challenge S and Indigo2, as well as certain
378 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
379 that runs on these, say Y here.
382 bool "SGI IP27 (Origin200/2000)"
386 select DEFAULT_SGI_PARTITION
388 select SYS_HAS_EARLY_PRINTK
390 select NR_CPUS_DEFAULT_64
391 select SYS_HAS_CPU_R10000
392 select SYS_SUPPORTS_64BIT_KERNEL
393 select SYS_SUPPORTS_BIG_ENDIAN
394 select SYS_SUPPORTS_NUMA
395 select SYS_SUPPORTS_SMP
397 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics
398 workstations. To compile a Linux kernel that runs on these, say Y
402 bool "SGI IP28 (Indigo2 R10k) (EXPERIMENTAL)"
403 depends on EXPERIMENTAL
409 select DEFAULT_SGI_PARTITION
410 select DMA_NONCOHERENT
411 select GENERIC_ISA_DMA_SUPPORT_BROKEN
417 select SGI_HAS_INDYDOG
423 select SYS_HAS_CPU_R10000
425 # Disable EARLY_PRINTK for now since it leads to overwritten prom
426 # memory during early boot on some machines.
428 # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com
429 # for a more details discussion
431 # select SYS_HAS_EARLY_PRINTK
432 select SYS_SUPPORTS_64BIT_KERNEL
433 select SYS_SUPPORTS_BIG_ENDIAN
435 This is the SGI Indigo2 with R10000 processor. To compile a Linux
436 kernel that runs on these, say Y here.
445 select DMA_NONCOHERENT
448 select R5000_CPU_SCACHE
449 select RM7000_CPU_SCACHE
450 select SYS_HAS_CPU_R5000
451 select SYS_HAS_CPU_R10000 if BROKEN
452 select SYS_HAS_CPU_RM7000
453 select SYS_HAS_CPU_NEVADA
454 select SYS_SUPPORTS_64BIT_KERNEL
455 select SYS_SUPPORTS_BIG_ENDIAN
457 If you want this kernel to run on SGI O2 workstation, say Y here.
460 bool "Sibyte BCM91120C-CRhine"
461 depends on EXPERIMENTAL
464 select SIBYTE_BCM1120
466 select SYS_HAS_CPU_SB1
467 select SYS_SUPPORTS_BIG_ENDIAN
468 select SYS_SUPPORTS_LITTLE_ENDIAN
471 bool "Sibyte BCM91120x-Carmel"
472 depends on EXPERIMENTAL
475 select SIBYTE_BCM1120
477 select SYS_HAS_CPU_SB1
478 select SYS_SUPPORTS_BIG_ENDIAN
479 select SYS_SUPPORTS_LITTLE_ENDIAN
482 bool "Sibyte BCM91125C-CRhone"
483 depends on EXPERIMENTAL
486 select SIBYTE_BCM1125
488 select SYS_HAS_CPU_SB1
489 select SYS_SUPPORTS_BIG_ENDIAN
490 select SYS_SUPPORTS_HIGHMEM
491 select SYS_SUPPORTS_LITTLE_ENDIAN
494 bool "Sibyte BCM91125E-Rhone"
495 depends on EXPERIMENTAL
498 select SIBYTE_BCM1125H
500 select SYS_HAS_CPU_SB1
501 select SYS_SUPPORTS_BIG_ENDIAN
502 select SYS_SUPPORTS_LITTLE_ENDIAN
505 bool "Sibyte BCM91250A-SWARM"
508 select NR_CPUS_DEFAULT_2
511 select SYS_HAS_CPU_SB1
512 select SYS_SUPPORTS_BIG_ENDIAN
513 select SYS_SUPPORTS_HIGHMEM
514 select SYS_SUPPORTS_LITTLE_ENDIAN
515 select ZONE_DMA32 if 64BIT
517 config SIBYTE_LITTLESUR
518 bool "Sibyte BCM91250C2-LittleSur"
519 depends on EXPERIMENTAL
522 select NR_CPUS_DEFAULT_2
525 select SYS_HAS_CPU_SB1
526 select SYS_SUPPORTS_BIG_ENDIAN
527 select SYS_SUPPORTS_HIGHMEM
528 select SYS_SUPPORTS_LITTLE_ENDIAN
530 config SIBYTE_SENTOSA
531 bool "Sibyte BCM91250E-Sentosa"
532 depends on EXPERIMENTAL
535 select NR_CPUS_DEFAULT_2
538 select SYS_HAS_CPU_SB1
539 select SYS_SUPPORTS_BIG_ENDIAN
540 select SYS_SUPPORTS_LITTLE_ENDIAN
543 bool "Sibyte BCM91480B-BigSur"
546 select NR_CPUS_DEFAULT_4
547 select SIBYTE_BCM1x80
549 select SYS_HAS_CPU_SB1
550 select SYS_SUPPORTS_BIG_ENDIAN
551 select SYS_SUPPORTS_HIGHMEM
552 select SYS_SUPPORTS_LITTLE_ENDIAN
553 select ZONE_DMA32 if 64BIT
556 bool "SNI RM200/300/400"
557 select ARC if CPU_LITTLE_ENDIAN
558 select ARC32 if CPU_LITTLE_ENDIAN
559 select SNIPROM if CPU_BIG_ENDIAN
560 select ARCH_MAY_HAVE_PC_FDC
564 select DEFAULT_SGI_PARTITION if CPU_BIG_ENDIAN
565 select DMA_NONCOHERENT
566 select GENERIC_ISA_DMA
573 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
574 select SYS_HAS_CPU_R4X00
575 select SYS_HAS_CPU_R5000
576 select SYS_HAS_CPU_R10000
577 select R5000_CPU_SCACHE
578 select SYS_HAS_EARLY_PRINTK
579 select SYS_SUPPORTS_32BIT_KERNEL
580 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
581 select SYS_SUPPORTS_BIG_ENDIAN
582 select SYS_SUPPORTS_HIGHMEM
583 select SYS_SUPPORTS_LITTLE_ENDIAN
585 The SNI RM200/300/400 are MIPS-based machines manufactured by
586 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
587 Technology and now in turn merged with Fujitsu. Say Y here to
588 support this machine type.
591 bool "Toshiba TX39 series based machines"
594 bool "Toshiba TX49 series based machines"
596 config MIKROTIK_RB532
597 bool "Mikrotik RB532 boards"
600 select DMA_NONCOHERENT
603 select SYS_HAS_CPU_MIPS32_R1
604 select SYS_SUPPORTS_32BIT_KERNEL
605 select SYS_SUPPORTS_LITTLE_ENDIAN
608 select ARCH_REQUIRE_GPIOLIB
610 Support the Mikrotik(tm) RouterBoard 532 series,
611 based on the IDT RC32434 SoC.
614 bool "Wind River PPMC board"
619 select DMA_NONCOHERENT
621 select PCI_GT64XXX_PCI0
623 select SYS_HAS_CPU_MIPS32_R1
624 select SYS_HAS_CPU_MIPS32_R2
625 select SYS_HAS_CPU_MIPS64_R1
626 select SYS_HAS_CPU_NEVADA
627 select SYS_HAS_CPU_RM7000
628 select SYS_SUPPORTS_32BIT_KERNEL
629 select SYS_SUPPORTS_64BIT_KERNEL
630 select SYS_SUPPORTS_BIG_ENDIAN
631 select SYS_SUPPORTS_LITTLE_ENDIAN
633 This enables support for the Wind River MIPS32 4KC PPMC evaluation
634 board, which is based on GT64120 bridge chip.
636 config CAVIUM_OCTEON_SIMULATOR
637 bool "Cavium Networks Octeon Simulator"
639 select 64BIT_PHYS_ADDR
641 select SYS_SUPPORTS_64BIT_KERNEL
642 select SYS_SUPPORTS_BIG_ENDIAN
643 select SYS_SUPPORTS_HIGHMEM
644 select SYS_SUPPORTS_HOTPLUG_CPU
645 select SYS_HAS_CPU_CAVIUM_OCTEON
647 The Octeon simulator is software performance model of the Cavium
648 Octeon Processor. It supports simulating Octeon processors on x86
651 config CAVIUM_OCTEON_REFERENCE_BOARD
652 bool "Cavium Networks Octeon reference board"
654 select 64BIT_PHYS_ADDR
656 select SYS_SUPPORTS_64BIT_KERNEL
657 select SYS_SUPPORTS_BIG_ENDIAN
658 select SYS_SUPPORTS_HIGHMEM
659 select SYS_SUPPORTS_HOTPLUG_CPU
660 select SYS_HAS_EARLY_PRINTK
661 select SYS_HAS_CPU_CAVIUM_OCTEON
664 select ARCH_SUPPORTS_MSI
666 This option supports all of the Octeon reference boards from Cavium
667 Networks. It builds a kernel that dynamically determines the Octeon
668 CPU type and supports all known board reference implementations.
669 Some of the supported boards are:
676 Say Y here for most Octeon reference boards.
680 source "arch/mips/alchemy/Kconfig"
681 source "arch/mips/basler/excite/Kconfig"
682 source "arch/mips/bcm63xx/Kconfig"
683 source "arch/mips/jazz/Kconfig"
684 source "arch/mips/lasat/Kconfig"
685 source "arch/mips/pmc-sierra/Kconfig"
686 source "arch/mips/sgi-ip27/Kconfig"
687 source "arch/mips/sibyte/Kconfig"
688 source "arch/mips/txx9/Kconfig"
689 source "arch/mips/vr41xx/Kconfig"
690 source "arch/mips/cavium-octeon/Kconfig"
691 source "arch/mips/loongson/Kconfig"
695 config RWSEM_GENERIC_SPINLOCK
699 config RWSEM_XCHGADD_ALGORITHM
702 config ARCH_HAS_ILOG2_U32
706 config ARCH_HAS_ILOG2_U64
710 config ARCH_SUPPORTS_OPROFILE
712 default y if !MIPS_MT_SMTC
714 config GENERIC_FIND_NEXT_BIT
718 config GENERIC_HWEIGHT
722 config GENERIC_CALIBRATE_DELAY
726 config GENERIC_CLOCKEVENTS
734 config GENERIC_CMOS_UPDATE
738 config SCHED_OMIT_FRAME_POINTER
742 config GENERIC_HARDIRQS_NO__DO_IRQ
746 # Select some configuration options automatically based on user selections.
751 config ARCH_MAY_HAVE_PC_FDC
797 select ARCH_REQUIRE_GPIOLIB
806 config DMA_NONCOHERENT
808 select DMA_NEED_PCI_MAP_STATE
810 config DMA_NEED_PCI_MAP_STATE
814 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
815 depends on SYS_HAS_EARLY_PRINTK
818 This option enables special console drivers which allow the kernel
819 to print messages very early in the bootup process.
821 This is useful for kernel debugging when your machine crashes very
822 early before the console code is initialized. For normal operation,
823 it is not recommended because it looks ugly on some machines and
824 doesn't cooperate with an X server. You should normally say N here,
825 unless you want to debug such a crash.
827 config SYS_HAS_EARLY_PRINTK
831 bool "Support for hot-pluggable CPUs"
832 depends on SMP && HOTPLUG && SYS_SUPPORTS_HOTPLUG_CPU
834 Say Y here to allow turning CPUs off and on. CPUs can be
835 controlled through /sys/devices/system/cpu.
836 (Note: power management support will enable this option
837 automatically on SMP systems. )
838 Say N if you want to disable CPU hotplug.
840 config SYS_SUPPORTS_HOTPLUG_CPU
855 config MIPS_DISABLE_OBSOLETE_IDE
864 config GENERIC_ISA_DMA
866 select ZONE_DMA if GENERIC_ISA_DMA_SUPPORT_BROKEN=n
868 config GENERIC_ISA_DMA_SUPPORT_BROKEN
870 select GENERIC_ISA_DMA
876 # Endianess selection. Sufficiently obscure so many users don't know what to
877 # answer,so we try hard to limit the available choices. Also the use of a
878 # choice statement should be more obvious to the user.
881 prompt "Endianess selection"
883 Some MIPS machines can be configured for either little or big endian
884 byte order. These modes require different kernels and a different
885 Linux distribution. In general there is one preferred byteorder for a
886 particular system but some systems are just as commonly used in the
887 one or the other endianness.
889 config CPU_BIG_ENDIAN
891 depends on SYS_SUPPORTS_BIG_ENDIAN
893 config CPU_LITTLE_ENDIAN
895 depends on SYS_SUPPORTS_LITTLE_ENDIAN
900 config SYS_SUPPORTS_APM_EMULATION
903 config SYS_SUPPORTS_BIG_ENDIAN
906 config SYS_SUPPORTS_LITTLE_ENDIAN
909 config SYS_SUPPORTS_HUGETLBFS
911 depends on CPU_SUPPORTS_HUGEPAGES && 64BIT
938 config IRQ_CPU_OCTEON
941 config MIPS_BOARDS_GEN
944 config PCI_GT64XXX_PCI0
947 config NO_EXCEPT_FILL
958 select DMA_NONCOHERENT
961 select SYS_HAS_CPU_R5500
962 select SYS_SUPPORTS_32BIT_KERNEL
963 select SYS_SUPPORTS_64BIT_KERNEL
964 select SYS_SUPPORTS_BIG_ENDIAN
971 select DMA_NONCOHERENT
972 select SYS_HAS_CPU_MIPS32_R2
973 select SYS_SUPPORTS_32BIT_KERNEL
974 select SYS_SUPPORTS_LITTLE_ENDIAN
975 select SYS_SUPPORTS_BIG_ENDIAN
977 select CPU_MIPSR2_IRQ_VI
989 select DMA_NONCOHERENT
991 select SYS_HAS_CPU_MIPS32_R1
992 select SYS_HAS_EARLY_PRINTK
993 select SYS_SUPPORTS_32BIT_KERNEL
1002 config SGI_HAS_INDYDOG
1014 config SGI_HAS_ZILOG
1017 config SGI_HAS_I8042
1020 config DEFAULT_SGI_PARTITION
1032 config MIPS_L1_CACHE_SHIFT
1034 default "4" if MACH_DECSTATION || MIKROTIK_RB532 || PMC_MSP4200_EVAL
1035 default "6" if MIPS_CPU_SCACHE
1036 default "7" if SGI_IP22 || SGI_IP27 || SGI_IP28 || SNI_RM || CPU_CAVIUM_OCTEON
1039 config HAVE_STD_PC_SERIAL_PORT
1043 bool "ARC console support"
1044 depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN)
1048 depends on MACH_JAZZ || SNI_RM || SGI_IP32
1053 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP28 || SGI_IP32
1062 menu "CPU selection"
1068 config CPU_LOONGSON2E
1070 depends on SYS_HAS_CPU_LOONGSON2E
1071 select CPU_LOONGSON2
1073 The Loongson 2E processor implements the MIPS III instruction set
1074 with many extensions.
1076 It has an internal FPGA northbridge, which is compatiable to
1079 config CPU_LOONGSON2F
1081 depends on SYS_HAS_CPU_LOONGSON2F
1082 select CPU_LOONGSON2
1084 The Loongson 2F processor implements the MIPS III instruction set
1085 with many extensions.
1087 Loongson2F have built-in DDR2 and PCIX controller. The PCIX controller
1088 have a similar programming interface with FPGA northbridge used in
1091 config CPU_MIPS32_R1
1092 bool "MIPS32 Release 1"
1093 depends on SYS_HAS_CPU_MIPS32_R1
1094 select CPU_HAS_PREFETCH
1095 select CPU_SUPPORTS_32BIT_KERNEL
1096 select CPU_SUPPORTS_HIGHMEM
1098 Choose this option to build a kernel for release 1 or later of the
1099 MIPS32 architecture. Most modern embedded systems with a 32-bit
1100 MIPS processor are based on a MIPS32 processor. If you know the
1101 specific type of processor in your system, choose those that one
1102 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1103 Release 2 of the MIPS32 architecture is available since several
1104 years so chances are you even have a MIPS32 Release 2 processor
1105 in which case you should choose CPU_MIPS32_R2 instead for better
1108 config CPU_MIPS32_R2
1109 bool "MIPS32 Release 2"
1110 depends on SYS_HAS_CPU_MIPS32_R2
1111 select CPU_HAS_PREFETCH
1112 select CPU_SUPPORTS_32BIT_KERNEL
1113 select CPU_SUPPORTS_HIGHMEM
1115 Choose this option to build a kernel for release 2 or later of the
1116 MIPS32 architecture. Most modern embedded systems with a 32-bit
1117 MIPS processor are based on a MIPS32 processor. If you know the
1118 specific type of processor in your system, choose those that one
1119 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
1121 config CPU_MIPS64_R1
1122 bool "MIPS64 Release 1"
1123 depends on SYS_HAS_CPU_MIPS64_R1
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 1 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.
1135 Release 2 of the MIPS64 architecture is available since several
1136 years so chances are you even have a MIPS64 Release 2 processor
1137 in which case you should choose CPU_MIPS64_R2 instead for better
1140 config CPU_MIPS64_R2
1141 bool "MIPS64 Release 2"
1142 depends on SYS_HAS_CPU_MIPS64_R2
1143 select CPU_HAS_PREFETCH
1144 select CPU_SUPPORTS_32BIT_KERNEL
1145 select CPU_SUPPORTS_64BIT_KERNEL
1146 select CPU_SUPPORTS_HIGHMEM
1147 select CPU_SUPPORTS_HUGEPAGES
1149 Choose this option to build a kernel for release 2 or later of the
1150 MIPS64 architecture. Many modern embedded systems with a 64-bit
1151 MIPS processor are based on a MIPS64 processor. If you know the
1152 specific type of processor in your system, choose those that one
1153 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
1157 depends on SYS_HAS_CPU_R3000
1159 select CPU_SUPPORTS_32BIT_KERNEL
1160 select CPU_SUPPORTS_HIGHMEM
1162 Please make sure to pick the right CPU type. Linux/MIPS is not
1163 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
1164 *not* work on R4000 machines and vice versa. However, since most
1165 of the supported machines have an R4000 (or similar) CPU, R4x00
1166 might be a safe bet. If the resulting kernel does not work,
1167 try to recompile with R3000.
1171 depends on SYS_HAS_CPU_TX39XX
1172 select CPU_SUPPORTS_32BIT_KERNEL
1176 depends on SYS_HAS_CPU_VR41XX
1177 select CPU_SUPPORTS_32BIT_KERNEL
1178 select CPU_SUPPORTS_64BIT_KERNEL
1180 The options selects support for the NEC VR4100 series of processors.
1181 Only choose this option if you have one of these processors as a
1182 kernel built with this option will not run on any other type of
1183 processor or vice versa.
1187 depends on SYS_HAS_CPU_R4300
1188 select CPU_SUPPORTS_32BIT_KERNEL
1189 select CPU_SUPPORTS_64BIT_KERNEL
1191 MIPS Technologies R4300-series processors.
1195 depends on SYS_HAS_CPU_R4X00
1196 select CPU_SUPPORTS_32BIT_KERNEL
1197 select CPU_SUPPORTS_64BIT_KERNEL
1199 MIPS Technologies R4000-series processors other than 4300, including
1200 the R4000, R4400, R4600, and 4700.
1204 depends on SYS_HAS_CPU_TX49XX
1205 select CPU_HAS_PREFETCH
1206 select CPU_SUPPORTS_32BIT_KERNEL
1207 select CPU_SUPPORTS_64BIT_KERNEL
1211 depends on SYS_HAS_CPU_R5000
1212 select CPU_SUPPORTS_32BIT_KERNEL
1213 select CPU_SUPPORTS_64BIT_KERNEL
1215 MIPS Technologies R5000-series processors other than the Nevada.
1219 depends on SYS_HAS_CPU_R5432
1220 select CPU_SUPPORTS_32BIT_KERNEL
1221 select CPU_SUPPORTS_64BIT_KERNEL
1225 depends on SYS_HAS_CPU_R5500
1226 select CPU_SUPPORTS_32BIT_KERNEL
1227 select CPU_SUPPORTS_64BIT_KERNEL
1228 select CPU_SUPPORTS_HUGEPAGES
1230 NEC VR5500 and VR5500A series processors implement 64-bit MIPS IV
1235 depends on EXPERIMENTAL
1236 depends on SYS_HAS_CPU_R6000
1237 select CPU_SUPPORTS_32BIT_KERNEL
1239 MIPS Technologies R6000 and R6000A series processors. Note these
1240 processors are extremely rare and the support for them is incomplete.
1244 depends on SYS_HAS_CPU_NEVADA
1245 select CPU_SUPPORTS_32BIT_KERNEL
1246 select CPU_SUPPORTS_64BIT_KERNEL
1248 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1252 depends on EXPERIMENTAL
1253 depends on SYS_HAS_CPU_R8000
1254 select CPU_HAS_PREFETCH
1255 select CPU_SUPPORTS_64BIT_KERNEL
1257 MIPS Technologies R8000 processors. Note these processors are
1258 uncommon and the support for them is incomplete.
1262 depends on SYS_HAS_CPU_R10000
1263 select CPU_HAS_PREFETCH
1264 select CPU_SUPPORTS_32BIT_KERNEL
1265 select CPU_SUPPORTS_64BIT_KERNEL
1266 select CPU_SUPPORTS_HIGHMEM
1268 MIPS Technologies R10000-series processors.
1272 depends on SYS_HAS_CPU_RM7000
1273 select CPU_HAS_PREFETCH
1274 select CPU_SUPPORTS_32BIT_KERNEL
1275 select CPU_SUPPORTS_64BIT_KERNEL
1276 select CPU_SUPPORTS_HIGHMEM
1280 depends on SYS_HAS_CPU_RM9000
1281 select CPU_HAS_PREFETCH
1282 select CPU_SUPPORTS_32BIT_KERNEL
1283 select CPU_SUPPORTS_64BIT_KERNEL
1284 select CPU_SUPPORTS_HIGHMEM
1285 select WEAK_ORDERING
1289 depends on SYS_HAS_CPU_SB1
1290 select CPU_SUPPORTS_32BIT_KERNEL
1291 select CPU_SUPPORTS_64BIT_KERNEL
1292 select CPU_SUPPORTS_HIGHMEM
1293 select WEAK_ORDERING
1295 config CPU_CAVIUM_OCTEON
1296 bool "Cavium Octeon processor"
1297 depends on SYS_HAS_CPU_CAVIUM_OCTEON
1299 select IRQ_CPU_OCTEON
1300 select CPU_HAS_PREFETCH
1301 select CPU_SUPPORTS_64BIT_KERNEL
1302 select SYS_SUPPORTS_SMP
1303 select NR_CPUS_DEFAULT_16
1304 select WEAK_ORDERING
1305 select WEAK_REORDERING_BEYOND_LLSC
1306 select CPU_SUPPORTS_HIGHMEM
1307 select CPU_SUPPORTS_HUGEPAGES
1309 The Cavium Octeon processor is a highly integrated chip containing
1310 many ethernet hardware widgets for networking tasks. The processor
1311 can have up to 16 Mips64v2 cores and 8 integrated gigabit ethernets.
1312 Full details can be found at http://www.caviumnetworks.com.
1316 config SYS_SUPPORTS_ZBOOT
1318 select HAVE_KERNEL_GZIP
1319 select HAVE_KERNEL_BZIP2
1320 select HAVE_KERNEL_LZMA
1322 config SYS_SUPPORTS_ZBOOT_UART16550
1324 select SYS_SUPPORTS_ZBOOT
1326 config CPU_LOONGSON2
1328 select CPU_SUPPORTS_32BIT_KERNEL
1329 select CPU_SUPPORTS_64BIT_KERNEL
1330 select CPU_SUPPORTS_HIGHMEM
1332 config SYS_HAS_CPU_LOONGSON2E
1335 config SYS_HAS_CPU_LOONGSON2F
1337 select CPU_SUPPORTS_CPUFREQ
1338 select CPU_SUPPORTS_ADDRWINCFG if 64BIT
1340 config SYS_HAS_CPU_MIPS32_R1
1343 config SYS_HAS_CPU_MIPS32_R2
1346 config SYS_HAS_CPU_MIPS64_R1
1349 config SYS_HAS_CPU_MIPS64_R2
1352 config SYS_HAS_CPU_R3000
1355 config SYS_HAS_CPU_TX39XX
1358 config SYS_HAS_CPU_VR41XX
1361 config SYS_HAS_CPU_R4300
1364 config SYS_HAS_CPU_R4X00
1367 config SYS_HAS_CPU_TX49XX
1370 config SYS_HAS_CPU_R5000
1373 config SYS_HAS_CPU_R5432
1376 config SYS_HAS_CPU_R5500
1379 config SYS_HAS_CPU_R6000
1382 config SYS_HAS_CPU_NEVADA
1385 config SYS_HAS_CPU_R8000
1388 config SYS_HAS_CPU_R10000
1391 config SYS_HAS_CPU_RM7000
1394 config SYS_HAS_CPU_RM9000
1397 config SYS_HAS_CPU_SB1
1400 config SYS_HAS_CPU_CAVIUM_OCTEON
1404 # CPU may reorder R->R, R->W, W->R, W->W
1405 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1407 config WEAK_ORDERING
1411 # CPU may reorder reads and writes beyond LL/SC
1412 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1414 config WEAK_REORDERING_BEYOND_LLSC
1419 # These two indicate any level of the MIPS32 and MIPS64 architecture
1423 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1427 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1430 # These two indicate the revision of the architecture, either Release 1 or Release 2
1434 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1438 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_CAVIUM_OCTEON
1440 config SYS_SUPPORTS_32BIT_KERNEL
1442 config SYS_SUPPORTS_64BIT_KERNEL
1444 config CPU_SUPPORTS_32BIT_KERNEL
1446 config CPU_SUPPORTS_64BIT_KERNEL
1448 config CPU_SUPPORTS_CPUFREQ
1450 config CPU_SUPPORTS_ADDRWINCFG
1452 config CPU_SUPPORTS_HUGEPAGES
1454 config MIPS_PGD_C0_CONTEXT
1456 default y if 64BIT && CPU_MIPSR2
1459 # Set to y for ptrace access to watch registers.
1461 config HARDWARE_WATCHPOINTS
1463 default y if CPU_MIPSR1 || CPU_MIPSR2
1469 prompt "Kernel code model"
1471 You should only select this option if you have a workload that
1472 actually benefits from 64-bit processing or if your machine has
1473 large memory. You will only be presented a single option in this
1474 menu if your system does not support both 32-bit and 64-bit kernels.
1477 bool "32-bit kernel"
1478 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1481 Select this option if you want to build a 32-bit kernel.
1483 bool "64-bit kernel"
1484 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1485 select HAVE_SYSCALL_WRAPPERS
1487 Select this option if you want to build a 64-bit kernel.
1492 prompt "Kernel page size"
1493 default PAGE_SIZE_4KB
1495 config PAGE_SIZE_4KB
1497 depends on !CPU_LOONGSON2
1499 This option select the standard 4kB Linux page size. On some
1500 R3000-family processors this is the only available page size. Using
1501 4kB page size will minimize memory consumption and is therefore
1502 recommended for low memory systems.
1504 config PAGE_SIZE_8KB
1506 depends on (EXPERIMENTAL && CPU_R8000) || CPU_CAVIUM_OCTEON
1508 Using 8kB page size will result in higher performance kernel at
1509 the price of higher memory consumption. This option is available
1510 only on R8000 and cnMIPS processors. Note that you will need a
1511 suitable Linux distribution to support this.
1513 config PAGE_SIZE_16KB
1515 depends on !CPU_R3000 && !CPU_TX39XX
1517 Using 16kB page size will result in higher performance kernel at
1518 the price of higher memory consumption. This option is available on
1519 all non-R3000 family processors. Note that you will need a suitable
1520 Linux distribution to support this.
1522 config PAGE_SIZE_32KB
1524 depends on CPU_CAVIUM_OCTEON
1526 Using 32kB page size will result in higher performance kernel at
1527 the price of higher memory consumption. This option is available
1528 only on cnMIPS cores. Note that you will need a suitable Linux
1529 distribution to support this.
1531 config PAGE_SIZE_64KB
1533 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1535 Using 64kB page size will result in higher performance kernel at
1536 the price of higher memory consumption. This option is available on
1537 all non-R3000 family processor. Not that at the time of this
1538 writing this option is still high experimental.
1545 config IP22_CPU_SCACHE
1550 # Support for a MIPS32 / MIPS64 style S-caches
1552 config MIPS_CPU_SCACHE
1556 config R5000_CPU_SCACHE
1560 config RM7000_CPU_SCACHE
1564 config SIBYTE_DMA_PAGEOPS
1565 bool "Use DMA to clear/copy pages"
1568 Instead of using the CPU to zero and copy pages, use a Data Mover
1569 channel. These DMA channels are otherwise unused by the standard
1570 SiByte Linux port. Seems to give a small performance benefit.
1572 config CPU_HAS_PREFETCH
1576 prompt "MIPS MT options"
1578 config MIPS_MT_DISABLED
1579 bool "Disable multithreading support."
1581 Use this option if your workload can't take advantage of
1582 MIPS hardware multithreading support. On systems that don't have
1583 the option of an MT-enabled processor this option will be the only
1584 option in this menu.
1587 bool "Use 1 TC on each available VPE for SMP"
1588 depends on SYS_SUPPORTS_MULTITHREADING
1589 select CPU_MIPSR2_IRQ_VI
1590 select CPU_MIPSR2_IRQ_EI
1592 select NR_CPUS_DEFAULT_2
1594 select SYS_SUPPORTS_SCHED_SMT if SMP
1595 select SYS_SUPPORTS_SMP
1598 This is a kernel model which is also known a VSMP or lately
1599 has been marketesed into SMVP.
1602 bool "SMTC: Use all TCs on all VPEs for SMP"
1603 depends on CPU_MIPS32_R2
1604 #depends on CPU_MIPS64_R2 # once there is hardware ...
1605 depends on SYS_SUPPORTS_MULTITHREADING
1606 select CPU_MIPSR2_IRQ_VI
1607 select CPU_MIPSR2_IRQ_EI
1609 select NR_CPUS_DEFAULT_8
1611 select SYS_SUPPORTS_SMP
1614 This is a kernel model which is known a SMTC or lately has been
1615 marketesed into SMVP.
1623 bool "SMT (multithreading) scheduler support"
1624 depends on SYS_SUPPORTS_SCHED_SMT
1627 SMT scheduler support improves the CPU scheduler's decision making
1628 when dealing with MIPS MT enabled cores at a cost of slightly
1629 increased overhead in some places. If unsure say N here.
1631 config SYS_SUPPORTS_SCHED_SMT
1635 config SYS_SUPPORTS_MULTITHREADING
1638 config MIPS_MT_FPAFF
1639 bool "Dynamic FPU affinity for FP-intensive threads"
1641 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1643 config MIPS_VPE_LOADER
1644 bool "VPE loader support."
1645 depends on SYS_SUPPORTS_MULTITHREADING
1646 select CPU_MIPSR2_IRQ_VI
1647 select CPU_MIPSR2_IRQ_EI
1650 Includes a loader for loading an elf relocatable object
1651 onto another VPE and running it.
1653 config MIPS_MT_SMTC_IM_BACKSTOP
1654 bool "Use per-TC register bits as backstop for inhibited IM bits"
1655 depends on MIPS_MT_SMTC
1658 To support multiple TC microthreads acting as "CPUs" within
1659 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1660 during interrupt handling. To support legacy drivers and interrupt
1661 controller management code, SMTC has a "backstop" to track and
1662 if necessary restore the interrupt mask. This has some performance
1663 impact on interrupt service overhead.
1665 config MIPS_MT_SMTC_IRQAFF
1666 bool "Support IRQ affinity API"
1667 depends on MIPS_MT_SMTC
1670 Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.)
1671 for SMTC Linux kernel. Requires platform support, of which
1672 an example can be found in the MIPS kernel i8259 and Malta
1673 platform code. Adds some overhead to interrupt dispatch, and
1674 should be used only if you know what you are doing.
1676 config MIPS_VPE_LOADER_TOM
1677 bool "Load VPE program into memory hidden from linux"
1678 depends on MIPS_VPE_LOADER
1681 The loader can use memory that is present but has been hidden from
1682 Linux using the kernel command line option "mem=xxMB". It's up to
1683 you to ensure the amount you put in the option and the space your
1684 program requires is less or equal to the amount physically present.
1686 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1687 config MIPS_VPE_APSP_API
1688 bool "Enable support for AP/SP API (RTLX)"
1689 depends on MIPS_VPE_LOADER
1692 config MIPS_APSP_KSPD
1694 depends on MIPS_VPE_APSP_API
1697 KSPD is a kernel daemon that accepts syscall requests from the SP
1698 side, actions them and returns the results. It also handles the
1699 "exit" syscall notifying other kernel modules the SP program is
1700 exiting. You probably want to say yes here.
1703 bool "MIPS CMP framework support"
1704 depends on SYS_SUPPORTS_MIPS_CMP
1706 select SYS_SUPPORTS_SMP
1707 select SYS_SUPPORTS_SCHED_SMT if SMP
1708 select WEAK_ORDERING
1711 This is a placeholder option for the GCMP work. It will need to
1712 be handled differently...
1714 config SB1_PASS_1_WORKAROUNDS
1716 depends on CPU_SB1_PASS_1
1719 config SB1_PASS_2_WORKAROUNDS
1721 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1724 config SB1_PASS_2_1_WORKAROUNDS
1726 depends on CPU_SB1 && CPU_SB1_PASS_2
1729 config 64BIT_PHYS_ADDR
1732 config CPU_HAS_SMARTMIPS
1733 depends on SYS_SUPPORTS_SMARTMIPS
1734 bool "Support for the SmartMIPS ASE"
1736 SmartMIPS is a extension of the MIPS32 architecture aimed at
1737 increased security at both hardware and software level for
1738 smartcards. Enabling this option will allow proper use of the
1739 SmartMIPS instructions by Linux applications. However a kernel with
1740 this option will not work on a MIPS core without SmartMIPS core. If
1741 you don't know you probably don't have SmartMIPS and should say N
1748 # Vectored interrupt mode is an R2 feature
1750 config CPU_MIPSR2_IRQ_VI
1754 # Extended interrupt mode is an R2 feature
1756 config CPU_MIPSR2_IRQ_EI
1761 depends on !CPU_R3000
1764 config GENERIC_CLOCKEVENTS_BROADCAST
1770 config CPU_DADDI_WORKAROUNDS
1773 config CPU_R4000_WORKAROUNDS
1775 select CPU_R4400_WORKAROUNDS
1777 config CPU_R4400_WORKAROUNDS
1781 # Use the generic interrupt handling code in kernel/irq/:
1783 config GENERIC_HARDIRQS
1787 config GENERIC_IRQ_PROBE
1795 # - Highmem only makes sense for the 32-bit kernel.
1796 # - The current highmem code will only work properly on physically indexed
1797 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1798 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1799 # moment we protect the user and offer the highmem option only on machines
1800 # where it's known to be safe. This will not offer highmem on a few systems
1801 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1802 # indexed CPUs but we're playing safe.
1803 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1804 # know they might have memory configurations that could make use of highmem
1808 bool "High Memory Support"
1809 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1811 config CPU_SUPPORTS_HIGHMEM
1814 config SYS_SUPPORTS_HIGHMEM
1817 config SYS_SUPPORTS_SMARTMIPS
1820 config ARCH_FLATMEM_ENABLE
1822 depends on !NUMA && !CPU_LOONGSON2
1824 config ARCH_DISCONTIGMEM_ENABLE
1826 default y if SGI_IP27
1828 Say Y to support efficient handling of discontiguous physical memory,
1829 for architectures which are either NUMA (Non-Uniform Memory Access)
1830 or have huge holes in the physical address space for other reasons.
1831 See <file:Documentation/vm/numa> for more.
1833 config ARCH_POPULATES_NODE_MAP
1836 config ARCH_SPARSEMEM_ENABLE
1838 select SPARSEMEM_STATIC
1842 depends on SYS_SUPPORTS_NUMA
1844 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1845 Access). This option improves performance on systems with more
1846 than two nodes; on two node systems it is generally better to
1847 leave it disabled; on single node systems disable this option
1850 config SYS_SUPPORTS_NUMA
1856 depends on NEED_MULTIPLE_NODES
1861 bool "Multi-Processing support"
1862 depends on SYS_SUPPORTS_SMP
1864 select USE_GENERIC_SMP_HELPERS
1866 This enables support for systems with more than one CPU. If you have
1867 a system with only one CPU, like most personal computers, say N. If
1868 you have a system with more than one CPU, say Y.
1870 If you say N here, the kernel will run on single and multiprocessor
1871 machines, but will use only one CPU of a multiprocessor machine. If
1872 you say Y here, the kernel will run on many, but not all,
1873 singleprocessor machines. On a singleprocessor machine, the kernel
1874 will run faster if you say N here.
1876 People using multiprocessor machines who say Y here should also say
1877 Y to "Enhanced Real Time Clock Support", below.
1879 See also the SMP-HOWTO available at
1880 <http://www.tldp.org/docs.html#howto>.
1882 If you don't know what to do here, say N.
1887 config SYS_SUPPORTS_MIPS_CMP
1890 config SYS_SUPPORTS_SMP
1893 config NR_CPUS_DEFAULT_1
1896 config NR_CPUS_DEFAULT_2
1899 config NR_CPUS_DEFAULT_4
1902 config NR_CPUS_DEFAULT_8
1905 config NR_CPUS_DEFAULT_16
1908 config NR_CPUS_DEFAULT_32
1911 config NR_CPUS_DEFAULT_64
1915 int "Maximum number of CPUs (2-64)"
1916 range 1 64 if NR_CPUS_DEFAULT_1
1918 default "1" if NR_CPUS_DEFAULT_1
1919 default "2" if NR_CPUS_DEFAULT_2
1920 default "4" if NR_CPUS_DEFAULT_4
1921 default "8" if NR_CPUS_DEFAULT_8
1922 default "16" if NR_CPUS_DEFAULT_16
1923 default "32" if NR_CPUS_DEFAULT_32
1924 default "64" if NR_CPUS_DEFAULT_64
1926 This allows you to specify the maximum number of CPUs which this
1927 kernel will support. The maximum supported value is 32 for 32-bit
1928 kernel and 64 for 64-bit kernels; the minimum value which makes
1929 sense is 1 for Qemu (useful only for kernel debugging purposes)
1930 and 2 for all others.
1932 This is purely to save memory - each supported CPU adds
1933 approximately eight kilobytes to the kernel image. For best
1934 performance should round up your number of processors to the next
1937 source "kernel/time/Kconfig"
1940 # Timer Interrupt Frequency Configuration
1944 prompt "Timer frequency"
1947 Allows the configuration of the timer frequency.
1950 bool "48 HZ" if SYS_SUPPORTS_48HZ || SYS_SUPPORTS_ARBIT_HZ
1953 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1956 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1959 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1962 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1965 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1968 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1972 config SYS_SUPPORTS_48HZ
1975 config SYS_SUPPORTS_100HZ
1978 config SYS_SUPPORTS_128HZ
1981 config SYS_SUPPORTS_250HZ
1984 config SYS_SUPPORTS_256HZ
1987 config SYS_SUPPORTS_1000HZ
1990 config SYS_SUPPORTS_1024HZ
1993 config SYS_SUPPORTS_ARBIT_HZ
1995 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1996 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1997 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1998 !SYS_SUPPORTS_1024HZ
2003 default 100 if HZ_100
2004 default 128 if HZ_128
2005 default 250 if HZ_250
2006 default 256 if HZ_256
2007 default 1000 if HZ_1000
2008 default 1024 if HZ_1024
2010 source "kernel/Kconfig.preempt"
2012 config MIPS_INSANE_LARGE
2013 bool "Support for large 64-bit configurations"
2014 depends on CPU_R10000 && 64BIT
2016 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
2017 previous 64-bit processors which only supported 40 bit / 1TB. If you
2018 need processes of more than 1TB virtual address space, say Y here.
2019 This will result in additional memory usage, so it is not
2020 recommended for normal users.
2023 bool "Kexec system call (EXPERIMENTAL)"
2024 depends on EXPERIMENTAL
2026 kexec is a system call that implements the ability to shutdown your
2027 current kernel, and to start another kernel. It is like a reboot
2028 but it is independent of the system firmware. And like a reboot
2029 you can start any kernel with it, not just Linux.
2031 The name comes from the similarity to the exec system call.
2033 It is an ongoing process to be certain the hardware in a machine
2034 is properly shutdown, so do not be surprised if this code does not
2035 initially work for you. It may help to enable device hotplugging
2036 support. As of this writing the exact hardware interface is
2037 strongly in flux, so no good recommendation can be made.
2040 bool "Enable seccomp to safely compute untrusted bytecode"
2044 This kernel feature is useful for number crunching applications
2045 that may need to compute untrusted bytecode during their
2046 execution. By using pipes or other transports made available to
2047 the process as file descriptors supporting the read/write
2048 syscalls, it's possible to isolate those applications in
2049 their own address space using seccomp. Once seccomp is
2050 enabled via /proc/<pid>/seccomp, it cannot be disabled
2051 and the task is only allowed to execute a few safe syscalls
2052 defined by each seccomp mode.
2054 If unsure, say Y. Only embedded should say N here.
2058 config LOCKDEP_SUPPORT
2062 config STACKTRACE_SUPPORT
2066 source "init/Kconfig"
2068 source "kernel/Kconfig.freezer"
2070 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
2078 bool "Support for PCI controller"
2079 depends on HW_HAS_PCI
2082 Find out whether you have a PCI motherboard. PCI is the name of a
2083 bus system, i.e. the way the CPU talks to the other stuff inside
2084 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
2090 source "drivers/pci/Kconfig"
2093 # ISA support is now enabled via select. Too many systems still have the one
2094 # or other ISA chip on the board that users don't know about so don't expect
2095 # users to choose the right thing ...
2102 depends on HW_HAS_EISA
2104 select GENERIC_ISA_DMA
2106 The Extended Industry Standard Architecture (EISA) bus was
2107 developed as an open alternative to the IBM MicroChannel bus.
2109 The EISA bus provided some of the features of the IBM MicroChannel
2110 bus while maintaining backward compatibility with cards made for
2111 the older ISA bus. The EISA bus saw limited use between 1988 and
2112 1995 when it was made obsolete by the PCI bus.
2114 Say Y here if you are building a kernel for an EISA-based machine.
2118 source "drivers/eisa/Kconfig"
2121 bool "TURBOchannel support"
2122 depends on MACH_DECSTATION
2124 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
2125 processors. Documentation on writing device drivers for TurboChannel
2127 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
2130 # bool "Access.Bus support"
2143 source "drivers/pcmcia/Kconfig"
2145 source "drivers/pci/hotplug/Kconfig"
2149 menu "Executable file formats"
2151 source "fs/Kconfig.binfmt"
2156 config MIPS32_COMPAT
2157 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
2160 Select this option if you want Linux/MIPS 32-bit binary
2161 compatibility. Since all software available for Linux/MIPS is
2162 currently 32-bit you should say Y here.
2166 depends on MIPS32_COMPAT
2169 config SYSVIPC_COMPAT
2171 depends on COMPAT && SYSVIPC
2175 bool "Kernel support for o32 binaries"
2176 depends on MIPS32_COMPAT
2178 Select this option if you want to run o32 binaries. These are pure
2179 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
2180 existing binaries are in this format.
2185 bool "Kernel support for n32 binaries"
2186 depends on MIPS32_COMPAT
2188 Select this option if you want to run n32 binaries. These are
2189 64-bit binaries using 32-bit quantities for addressing and certain
2190 data that would normally be 64-bit. They are used in special
2197 default y if MIPS32_O32 || MIPS32_N32
2201 menu "Power management options"
2203 config ARCH_HIBERNATION_POSSIBLE
2205 depends on SYS_SUPPORTS_HOTPLUG_CPU || !SMP
2207 config ARCH_SUSPEND_POSSIBLE
2209 depends on SYS_SUPPORTS_HOTPLUG_CPU || !SMP
2211 source "kernel/power/Kconfig"
2215 source "net/Kconfig"
2217 source "drivers/Kconfig"
2221 source "arch/mips/Kconfig.debug"
2223 source "security/Kconfig"
2225 source "crypto/Kconfig"
2227 source "lib/Kconfig"