4 # Horrible source of confusion. Die, die, die ...
7 mainmenu "Linux/MIPS Kernel Configuration"
9 menu "Machine selection"
19 bool "Alchemy processor based machines"
22 bool "Basler eXcite smart camera"
29 select SYS_HAS_CPU_RM9000
30 select SYS_SUPPORTS_32BIT_KERNEL
31 select SYS_SUPPORTS_64BIT_KERNEL
32 select SYS_SUPPORTS_BIG_ENDIAN
33 select SYS_SUPPORTS_KGDB
35 The eXcite is a smart camera platform manufactured by
36 Basler Vision Technologies AG.
38 config BASLER_EXCITE_PROTOTYPE
39 bool "Support for pre-release units"
40 depends on BASLER_EXCITE
43 Pre-series (prototype) units are different from later ones in
44 some ways. Select this option if you have one of these. Please
45 note that a kernel built with this option selected will not be
46 able to run on normal units.
50 select DMA_NONCOHERENT
54 select PCI_GT64XXX_PCI0
55 select SYS_HAS_CPU_NEVADA
56 select SYS_HAS_EARLY_PRINTK
57 select SYS_SUPPORTS_32BIT_KERNEL
58 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
59 select SYS_SUPPORTS_LITTLE_ENDIAN
60 select GENERIC_HARDIRQS_NO__DO_IRQ
62 config MACH_DECSTATION
65 select DMA_NONCOHERENT
68 select SYS_HAS_CPU_R3000
69 select SYS_HAS_CPU_R4X00
70 select SYS_SUPPORTS_32BIT_KERNEL
71 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
72 select SYS_SUPPORTS_LITTLE_ENDIAN
73 select SYS_SUPPORTS_128HZ
74 select SYS_SUPPORTS_256HZ
75 select SYS_SUPPORTS_1024HZ
77 This enables support for DEC's MIPS based workstations. For details
78 see the Linux/MIPS FAQ on <http://www.linux-mips.org/> and the
79 DECstation porting pages on <http://decstation.unix-ag.org/>.
81 If you have one of the following DECstation Models you definitely
82 want to choose R4xx0 for the CPU Type:
89 otherwise choose R3000.
92 bool "Jazz family of machines"
95 select ARCH_MAY_HAVE_PC_FDC
96 select GENERIC_ISA_DMA
100 select SYS_HAS_CPU_R4X00
101 select SYS_SUPPORTS_32BIT_KERNEL
102 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
103 select SYS_SUPPORTS_100HZ
104 select GENERIC_HARDIRQS_NO__DO_IRQ
106 This a family of machines based on the MIPS R4030 chipset which was
107 used by several vendors to build RISC/os and Windows NT workstations.
108 Members include the Acer PICA, MIPS Magnum 4000, MIPS Millenium and
109 Olivetti M700-10 workstations.
112 bool "Lemote Fulong mini-PC"
113 select ARCH_SPARSEMEM_ENABLE
114 select SYS_HAS_CPU_LOONGSON2
115 select DMA_NONCOHERENT
118 select HAVE_STD_PC_SERIAL_PORT
123 select SYS_SUPPORTS_32BIT_KERNEL
124 select SYS_SUPPORTS_64BIT_KERNEL
125 select SYS_SUPPORTS_LITTLE_ENDIAN
126 select SYS_SUPPORTS_HIGHMEM
127 select SYS_HAS_EARLY_PRINTK
128 select GENERIC_HARDIRQS_NO__DO_IRQ
131 Lemote Fulong mini-PC board based on the Chinese Loongson-2E CPU and
135 bool "MIPS Atlas board"
137 select DMA_NONCOHERENT
138 select SYS_HAS_EARLY_PRINTK
141 select MIPS_BOARDS_GEN
143 select PCI_GT64XXX_PCI0
145 select RM7000_CPU_SCACHE
147 select SYS_HAS_CPU_MIPS32_R1
148 select SYS_HAS_CPU_MIPS32_R2
149 select SYS_HAS_CPU_MIPS64_R1
150 select SYS_HAS_CPU_NEVADA
151 select SYS_HAS_CPU_RM7000
152 select SYS_SUPPORTS_32BIT_KERNEL
153 select SYS_SUPPORTS_64BIT_KERNEL
154 select SYS_SUPPORTS_BIG_ENDIAN
155 select SYS_SUPPORTS_LITTLE_ENDIAN
156 select SYS_SUPPORTS_MULTITHREADING if EXPERIMENTAL
157 select SYS_SUPPORTS_SMARTMIPS
158 select GENERIC_HARDIRQS_NO__DO_IRQ
160 This enables support for the MIPS Technologies Atlas evaluation
164 bool "MIPS Malta board"
165 select ARCH_MAY_HAVE_PC_FDC
167 select DMA_NONCOHERENT
168 select GENERIC_ISA_DMA
172 select MIPS_BOARDS_GEN
174 select MIPS_CPU_SCACHE
175 select PCI_GT64XXX_PCI0
178 select SYS_HAS_CPU_MIPS32_R1
179 select SYS_HAS_CPU_MIPS32_R2
180 select SYS_HAS_CPU_MIPS64_R1
181 select SYS_HAS_CPU_NEVADA
182 select SYS_HAS_CPU_RM7000
183 select SYS_HAS_EARLY_PRINTK
184 select SYS_SUPPORTS_32BIT_KERNEL
185 select SYS_SUPPORTS_64BIT_KERNEL
186 select SYS_SUPPORTS_BIG_ENDIAN
187 select SYS_SUPPORTS_LITTLE_ENDIAN
188 select SYS_SUPPORTS_MULTITHREADING
189 select SYS_SUPPORTS_SMARTMIPS
191 This enables support for the MIPS Technologies Malta evaluation
195 bool "MIPS SEAD board (EXPERIMENTAL)"
196 depends on EXPERIMENTAL
198 select DMA_NONCOHERENT
199 select SYS_HAS_EARLY_PRINTK
200 select MIPS_BOARDS_GEN
201 select SYS_HAS_CPU_MIPS32_R1
202 select SYS_HAS_CPU_MIPS32_R2
203 select SYS_HAS_CPU_MIPS64_R1
204 select SYS_SUPPORTS_32BIT_KERNEL
205 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
206 select SYS_SUPPORTS_BIG_ENDIAN
207 select SYS_SUPPORTS_LITTLE_ENDIAN
208 select SYS_SUPPORTS_SMARTMIPS
210 This enables support for the MIPS Technologies SEAD evaluation
214 bool 'MIPS simulator (MIPSsim)'
215 select DMA_NONCOHERENT
216 select SYS_HAS_EARLY_PRINTK
219 select SYS_HAS_CPU_MIPS32_R1
220 select SYS_HAS_CPU_MIPS32_R2
221 select SYS_HAS_EARLY_PRINTK
222 select SYS_SUPPORTS_32BIT_KERNEL
223 select SYS_SUPPORTS_BIG_ENDIAN
224 select SYS_SUPPORTS_MULTITHREADING
225 select SYS_SUPPORTS_LITTLE_ENDIAN
227 This option enables support for MIPS Technologies MIPSsim software
231 bool "NEC EMMA2RH Mark-eins"
232 select DMA_NONCOHERENT
236 select SYS_SUPPORTS_32BIT_KERNEL
237 select SYS_SUPPORTS_BIG_ENDIAN
238 select SYS_SUPPORTS_LITTLE_ENDIAN
239 select SYS_HAS_CPU_R5000
241 This enables support for the R5432-based NEC Mark-eins
242 boards with R5500 CPU.
245 bool "NEC VR4100 series based machines"
246 select SYS_HAS_CPU_VR41XX
247 select GENERIC_HARDIRQS_NO__DO_IRQ
250 bool "Philips PNX8550 based JBS board"
252 select SYS_SUPPORTS_LITTLE_ENDIAN
254 config PNX8550_STB810
255 bool "Philips PNX8550 based STB810 board"
257 select SYS_SUPPORTS_LITTLE_ENDIAN
260 bool "PMC-Sierra MSP chipsets"
261 depends on EXPERIMENTAL
262 select DMA_NONCOHERENT
264 select NO_EXCEPT_FILL
266 select SYS_HAS_CPU_MIPS32_R1
267 select SYS_HAS_CPU_MIPS32_R2
268 select SYS_SUPPORTS_32BIT_KERNEL
269 select SYS_SUPPORTS_BIG_ENDIAN
270 select SYS_SUPPORTS_KGDB
273 select SERIAL_8250_CONSOLE
275 This adds support for the PMC-Sierra family of Multi-Service
276 Processor System-On-A-Chips. These parts include a number
277 of integrated peripherals, interfaces and DSPs in addition to
278 a variety of MIPS cores.
281 bool "PMC-Sierra Yosemite eval board"
288 select SYS_HAS_CPU_RM9000
289 select SYS_HAS_EARLY_PRINTK
290 select SYS_SUPPORTS_32BIT_KERNEL
291 select SYS_SUPPORTS_64BIT_KERNEL
292 select SYS_SUPPORTS_BIG_ENDIAN
293 select SYS_SUPPORTS_HIGHMEM
294 select SYS_SUPPORTS_KGDB
295 select SYS_SUPPORTS_SMP
297 Yosemite is an evaluation board for the RM9000x2 processor
298 manufactured by PMC-Sierra.
303 select GENERIC_ISA_DMA
304 select HAVE_STD_PC_SERIAL_PORT
309 select SYS_HAS_CPU_MIPS32_R1
310 select SYS_SUPPORTS_32BIT_KERNEL
311 select SYS_SUPPORTS_BIG_ENDIAN
312 select SYS_SUPPORTS_LITTLE_ENDIAN
313 select ARCH_SPARSEMEM_ENABLE
314 select GENERIC_HARDIRQS_NO__DO_IRQ
315 select NR_CPUS_DEFAULT_1
316 select SYS_SUPPORTS_SMP
318 Qemu is a software emulator which among other architectures also
319 can simulate a MIPS32 4Kc system. This patch adds support for the
320 system architecture that currently is being simulated by Qemu. It
321 will eventually be removed again when Qemu has the capability to
322 simulate actual MIPS hardware platforms. More information on Qemu
323 can be found at http://www.linux-mips.org/wiki/Qemu.
326 bool "SGI IP22 (Indy/Indigo2)"
330 select DMA_NONCOHERENT
332 select IP22_CPU_SCACHE
334 select GENERIC_ISA_DMA_SUPPORT_BROKEN
336 select SYS_HAS_CPU_R4X00
337 select SYS_HAS_CPU_R5000
338 select SYS_HAS_EARLY_PRINTK
339 select SYS_SUPPORTS_32BIT_KERNEL
340 select SYS_SUPPORTS_64BIT_KERNEL
341 select SYS_SUPPORTS_BIG_ENDIAN
343 This are the SGI Indy, Challenge S and Indigo2, as well as certain
344 OEM variants like the Tandem CMN B006S. To compile a Linux kernel
345 that runs on these, say Y here.
348 bool "SGI IP27 (Origin200/2000)"
353 select SYS_HAS_EARLY_PRINTK
355 select NR_CPUS_DEFAULT_64
357 select SYS_HAS_CPU_R10000
358 select SYS_SUPPORTS_64BIT_KERNEL
359 select SYS_SUPPORTS_BIG_ENDIAN
360 select SYS_SUPPORTS_KGDB
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
374 select DMA_NONCOHERENT
376 select R5000_CPU_SCACHE
377 select RM7000_CPU_SCACHE
378 select SYS_HAS_CPU_R5000
379 select SYS_HAS_CPU_R10000 if BROKEN
380 select SYS_HAS_CPU_RM7000
381 select SYS_HAS_CPU_NEVADA
382 select SYS_SUPPORTS_64BIT_KERNEL
383 select SYS_SUPPORTS_BIG_ENDIAN
385 If you want this kernel to run on SGI O2 workstation, say Y here.
388 bool "Sibyte BCM91120C-CRhine"
389 depends on EXPERIMENTAL
392 select SIBYTE_BCM1120
394 select SYS_HAS_CPU_SB1
395 select SYS_SUPPORTS_BIG_ENDIAN
396 select SYS_SUPPORTS_LITTLE_ENDIAN
399 bool "Sibyte BCM91120x-Carmel"
400 depends on EXPERIMENTAL
403 select SIBYTE_BCM1120
405 select SYS_HAS_CPU_SB1
406 select SYS_SUPPORTS_BIG_ENDIAN
407 select SYS_SUPPORTS_LITTLE_ENDIAN
410 bool "Sibyte BCM91125C-CRhone"
411 depends on EXPERIMENTAL
414 select SIBYTE_BCM1125
416 select SYS_HAS_CPU_SB1
417 select SYS_SUPPORTS_BIG_ENDIAN
418 select SYS_SUPPORTS_HIGHMEM
419 select SYS_SUPPORTS_LITTLE_ENDIAN
422 bool "Sibyte BCM91125E-Rhone"
423 depends on EXPERIMENTAL
426 select SIBYTE_BCM1125H
428 select SYS_HAS_CPU_SB1
429 select SYS_SUPPORTS_BIG_ENDIAN
430 select SYS_SUPPORTS_LITTLE_ENDIAN
433 bool "Sibyte BCM91250A-SWARM"
436 select NR_CPUS_DEFAULT_2
439 select SYS_HAS_CPU_SB1
440 select SYS_SUPPORTS_BIG_ENDIAN
441 select SYS_SUPPORTS_HIGHMEM
442 select SYS_SUPPORTS_KGDB
443 select SYS_SUPPORTS_LITTLE_ENDIAN
445 config SIBYTE_LITTLESUR
446 bool "Sibyte BCM91250C2-LittleSur"
447 depends on EXPERIMENTAL
450 select NR_CPUS_DEFAULT_2
453 select SYS_HAS_CPU_SB1
454 select SYS_SUPPORTS_BIG_ENDIAN
455 select SYS_SUPPORTS_HIGHMEM
456 select SYS_SUPPORTS_LITTLE_ENDIAN
458 config SIBYTE_SENTOSA
459 bool "Sibyte BCM91250E-Sentosa"
460 depends on EXPERIMENTAL
463 select NR_CPUS_DEFAULT_2
466 select SYS_HAS_CPU_SB1
467 select SYS_SUPPORTS_BIG_ENDIAN
468 select SYS_SUPPORTS_LITTLE_ENDIAN
470 config SIBYTE_PTSWARM
471 bool "Sibyte BCM91250PT-PTSWARM"
472 depends on EXPERIMENTAL
475 select NR_CPUS_DEFAULT_2
478 select SYS_HAS_CPU_SB1
479 select SYS_SUPPORTS_BIG_ENDIAN
480 select SYS_SUPPORTS_HIGHMEM
481 select SYS_SUPPORTS_LITTLE_ENDIAN
484 bool "Sibyte BCM91480B-BigSur"
487 select NR_CPUS_DEFAULT_4
489 select SIBYTE_BCM1x80
491 select SYS_HAS_CPU_SB1
492 select SYS_SUPPORTS_BIG_ENDIAN
493 select SYS_SUPPORTS_LITTLE_ENDIAN
496 bool "SNI RM200/300/400"
497 select ARC if CPU_LITTLE_ENDIAN
498 select ARC32 if CPU_LITTLE_ENDIAN
499 select ARCH_MAY_HAVE_PC_FDC
501 select DMA_NONCOHERENT
502 select GENERIC_ISA_DMA
509 select SWAP_IO_SPACE if CPU_BIG_ENDIAN
510 select SYS_HAS_CPU_R4X00
511 select SYS_HAS_CPU_R5000
512 select SYS_HAS_CPU_R10000
513 select R5000_CPU_SCACHE
514 select SYS_HAS_EARLY_PRINTK
515 select SYS_SUPPORTS_32BIT_KERNEL
516 select SYS_SUPPORTS_64BIT_KERNEL if EXPERIMENTAL
517 select SYS_SUPPORTS_BIG_ENDIAN
518 select SYS_SUPPORTS_HIGHMEM
519 select SYS_SUPPORTS_LITTLE_ENDIAN
521 The SNI RM200/300/400 are MIPS-based machines manufactured by
522 Siemens Nixdorf Informationssysteme (SNI), parent company of Pyramid
523 Technology and now in turn merged with Fujitsu. Say Y here to
524 support this machine type.
526 config TOSHIBA_JMR3927
527 bool "Toshiba JMR-TX3927 board"
528 select DMA_NONCOHERENT
533 select SYS_HAS_CPU_TX39XX
534 select SYS_SUPPORTS_32BIT_KERNEL
535 select SYS_SUPPORTS_LITTLE_ENDIAN
536 select SYS_SUPPORTS_BIG_ENDIAN
537 select GENERIC_HARDIRQS_NO__DO_IRQ
539 config TOSHIBA_RBTX4927
540 bool "Toshiba RBTX49[23]7 board"
541 select DMA_NONCOHERENT
542 select HAS_TXX9_SERIAL
546 select I8259 if TOSHIBA_FPCIB0
548 select SYS_HAS_CPU_TX49XX
549 select SYS_SUPPORTS_32BIT_KERNEL
550 select SYS_SUPPORTS_64BIT_KERNEL
551 select SYS_SUPPORTS_LITTLE_ENDIAN
552 select SYS_SUPPORTS_BIG_ENDIAN
553 select SYS_SUPPORTS_KGDB
554 select GENERIC_HARDIRQS_NO__DO_IRQ
556 This Toshiba board is based on the TX4927 processor. Say Y here to
557 support this machine type
559 config TOSHIBA_RBTX4938
560 bool "Toshiba RBTX4938 board"
561 select HAVE_STD_PC_SERIAL_PORT
562 select DMA_NONCOHERENT
563 select GENERIC_ISA_DMA
564 select HAS_TXX9_SERIAL
569 select SYS_HAS_CPU_TX49XX
570 select SYS_SUPPORTS_32BIT_KERNEL
571 select SYS_SUPPORTS_LITTLE_ENDIAN
572 select SYS_SUPPORTS_BIG_ENDIAN
573 select SYS_SUPPORTS_KGDB
574 select GENERIC_HARDIRQS_NO__DO_IRQ
577 This Toshiba board is based on the TX4938 processor. Say Y here to
578 support this machine type
581 bool "Wind River PPMC board"
584 select DMA_NONCOHERENT
586 select PCI_GT64XXX_PCI0
588 select SYS_HAS_CPU_MIPS32_R1
589 select SYS_HAS_CPU_MIPS32_R2
590 select SYS_HAS_CPU_MIPS64_R1
591 select SYS_HAS_CPU_NEVADA
592 select SYS_HAS_CPU_RM7000
593 select SYS_SUPPORTS_32BIT_KERNEL
594 select SYS_SUPPORTS_64BIT_KERNEL
595 select SYS_SUPPORTS_BIG_ENDIAN
596 select SYS_SUPPORTS_LITTLE_ENDIAN
598 This enables support for the Wind River MIPS32 4KC PPMC evaluation
599 board, which is based on GT64120 bridge chip.
603 source "arch/mips/au1000/Kconfig"
604 source "arch/mips/jazz/Kconfig"
605 source "arch/mips/pmc-sierra/Kconfig"
606 source "arch/mips/sgi-ip27/Kconfig"
607 source "arch/mips/sibyte/Kconfig"
608 source "arch/mips/tx4927/Kconfig"
609 source "arch/mips/tx4938/Kconfig"
610 source "arch/mips/vr41xx/Kconfig"
614 config RWSEM_GENERIC_SPINLOCK
618 config RWSEM_XCHGADD_ALGORITHM
621 config ARCH_HAS_ILOG2_U32
625 config ARCH_HAS_ILOG2_U64
629 config GENERIC_FIND_NEXT_BIT
633 config GENERIC_HWEIGHT
637 config GENERIC_CALIBRATE_DELAY
645 config SCHED_NO_NO_OMIT_FRAME_POINTER
649 config GENERIC_HARDIRQS_NO__DO_IRQ
654 # Select some configuration options automatically based on user selections.
659 config ARCH_MAY_HAVE_PC_FDC
673 select DMA_NEED_PCI_MAP_STATE
675 config DMA_NONCOHERENT
677 select DMA_NEED_PCI_MAP_STATE
679 config DMA_NEED_PCI_MAP_STATE
683 bool "Early printk" if EMBEDDED && DEBUG_KERNEL
684 depends on SYS_HAS_EARLY_PRINTK
687 This option enables special console drivers which allow the kernel
688 to print messages very early in the bootup process.
690 This is useful for kernel debugging when your machine crashes very
691 early before the console code is initialized. For normal operation,
692 it is not recommended because it looks ugly on some machines and
693 doesn't cooperate with an X server. You should normally say N here,
694 unless you want to debug such a crash.
696 config SYS_HAS_EARLY_PRINTK
699 config GENERIC_ISA_DMA
712 config MIPS_DISABLE_OBSOLETE_IDE
718 config GENERIC_ISA_DMA_SUPPORT_BROKEN
726 # Endianess selection. Sufficiently obscure so many users don't know what to
727 # answer,so we try hard to limit the available choices. Also the use of a
728 # choice statement should be more obvious to the user.
731 prompt "Endianess selection"
733 Some MIPS machines can be configured for either little or big endian
734 byte order. These modes require different kernels and a different
735 Linux distribution. In general there is one preferred byteorder for a
736 particular system but some systems are just as commonly used in the
737 one or the other endianness.
739 config CPU_BIG_ENDIAN
741 depends on SYS_SUPPORTS_BIG_ENDIAN
743 config CPU_LITTLE_ENDIAN
745 depends on SYS_SUPPORTS_LITTLE_ENDIAN
750 config SYS_SUPPORTS_APM_EMULATION
753 config SYS_SUPPORTS_BIG_ENDIAN
756 config SYS_SUPPORTS_LITTLE_ENDIAN
777 config MIPS_BOARDS_GEN
780 config PCI_GT64XXX_PCI0
783 config NO_EXCEPT_FILL
788 select HAS_TXX9_SERIAL
800 select DMA_NONCOHERENT
802 select SYS_HAS_CPU_MIPS32_R1
803 select SYS_HAS_EARLY_PRINTK
804 select SYS_SUPPORTS_32BIT_KERNEL
805 select GENERIC_HARDIRQS_NO__DO_IRQ
806 select SYS_SUPPORTS_KGDB
821 # Unfortunately not all GT64120 systems run the chip at the same clock.
822 # As the user for the clock rate and try to minimize the available options.
825 prompt "Galileo Chip Clock"
826 depends on MOMENCO_OCELOT
827 default SYSCLK_100 if MOMENCO_OCELOT
830 bool "100" if MOMENCO_OCELOT
840 config MIPS_L1_CACHE_SHIFT
842 default "4" if MACH_DECSTATION
843 default "7" if SGI_IP27 || SNI_RM
844 default "4" if PMC_MSP4200_EVAL
847 config HAVE_STD_PC_SERIAL_PORT
851 bool "ARC console support"
852 depends on SGI_IP22 || (SNI_RM && CPU_LITTLE_ENDIAN)
856 depends on MACH_JAZZ || SNI_RM || SGI_IP32
861 depends on MACH_JAZZ || SNI_RM || SGI_IP22 || SGI_IP32
878 depends on SYS_HAS_CPU_LOONGSON2
879 select CPU_SUPPORTS_32BIT_KERNEL
880 select CPU_SUPPORTS_64BIT_KERNEL
881 select CPU_SUPPORTS_HIGHMEM
883 The Loongson 2E processor implements the MIPS III instruction set
884 with many extensions.
887 bool "MIPS32 Release 1"
888 depends on SYS_HAS_CPU_MIPS32_R1
890 select CPU_HAS_PREFETCH
891 select CPU_SUPPORTS_32BIT_KERNEL
892 select CPU_SUPPORTS_HIGHMEM
894 Choose this option to build a kernel for release 1 or later of the
895 MIPS32 architecture. Most modern embedded systems with a 32-bit
896 MIPS processor are based on a MIPS32 processor. If you know the
897 specific type of processor in your system, choose those that one
898 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
899 Release 2 of the MIPS32 architecture is available since several
900 years so chances are you even have a MIPS32 Release 2 processor
901 in which case you should choose CPU_MIPS32_R2 instead for better
905 bool "MIPS32 Release 2"
906 depends on SYS_HAS_CPU_MIPS32_R2
908 select CPU_HAS_PREFETCH
909 select CPU_SUPPORTS_32BIT_KERNEL
910 select CPU_SUPPORTS_HIGHMEM
912 Choose this option to build a kernel for release 2 or later of the
913 MIPS32 architecture. Most modern embedded systems with a 32-bit
914 MIPS processor are based on a MIPS32 processor. If you know the
915 specific type of processor in your system, choose those that one
916 otherwise CPU_MIPS32_R1 is a safe bet for any MIPS32 system.
919 bool "MIPS64 Release 1"
920 depends on SYS_HAS_CPU_MIPS64_R1
922 select CPU_HAS_PREFETCH
923 select CPU_SUPPORTS_32BIT_KERNEL
924 select CPU_SUPPORTS_64BIT_KERNEL
925 select CPU_SUPPORTS_HIGHMEM
927 Choose this option to build a kernel for release 1 or later of the
928 MIPS64 architecture. Many modern embedded systems with a 64-bit
929 MIPS processor are based on a MIPS64 processor. If you know the
930 specific type of processor in your system, choose those that one
931 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
932 Release 2 of the MIPS64 architecture is available since several
933 years so chances are you even have a MIPS64 Release 2 processor
934 in which case you should choose CPU_MIPS64_R2 instead for better
938 bool "MIPS64 Release 2"
939 depends on SYS_HAS_CPU_MIPS64_R2
941 select CPU_HAS_PREFETCH
942 select CPU_SUPPORTS_32BIT_KERNEL
943 select CPU_SUPPORTS_64BIT_KERNEL
944 select CPU_SUPPORTS_HIGHMEM
946 Choose this option to build a kernel for release 2 or later of the
947 MIPS64 architecture. Many modern embedded systems with a 64-bit
948 MIPS processor are based on a MIPS64 processor. If you know the
949 specific type of processor in your system, choose those that one
950 otherwise CPU_MIPS64_R1 is a safe bet for any MIPS64 system.
954 depends on SYS_HAS_CPU_R3000
956 select CPU_SUPPORTS_32BIT_KERNEL
957 select CPU_SUPPORTS_HIGHMEM
959 Please make sure to pick the right CPU type. Linux/MIPS is not
960 designed to be generic, i.e. Kernels compiled for R3000 CPUs will
961 *not* work on R4000 machines and vice versa. However, since most
962 of the supported machines have an R4000 (or similar) CPU, R4x00
963 might be a safe bet. If the resulting kernel does not work,
964 try to recompile with R3000.
968 depends on SYS_HAS_CPU_TX39XX
969 select CPU_SUPPORTS_32BIT_KERNEL
973 depends on SYS_HAS_CPU_VR41XX
974 select CPU_SUPPORTS_32BIT_KERNEL
975 select CPU_SUPPORTS_64BIT_KERNEL
977 The options selects support for the NEC VR4100 series of processors.
978 Only choose this option if you have one of these processors as a
979 kernel built with this option will not run on any other type of
980 processor or vice versa.
984 depends on SYS_HAS_CPU_R4300
986 select CPU_SUPPORTS_32BIT_KERNEL
987 select CPU_SUPPORTS_64BIT_KERNEL
989 MIPS Technologies R4300-series processors.
993 depends on SYS_HAS_CPU_R4X00
995 select CPU_SUPPORTS_32BIT_KERNEL
996 select CPU_SUPPORTS_64BIT_KERNEL
998 MIPS Technologies R4000-series processors other than 4300, including
999 the R4000, R4400, R4600, and 4700.
1003 depends on SYS_HAS_CPU_TX49XX
1005 select CPU_HAS_PREFETCH
1006 select CPU_SUPPORTS_32BIT_KERNEL
1007 select CPU_SUPPORTS_64BIT_KERNEL
1011 depends on SYS_HAS_CPU_R5000
1013 select CPU_SUPPORTS_32BIT_KERNEL
1014 select CPU_SUPPORTS_64BIT_KERNEL
1016 MIPS Technologies R5000-series processors other than the Nevada.
1020 depends on SYS_HAS_CPU_R5432
1022 select CPU_SUPPORTS_32BIT_KERNEL
1023 select CPU_SUPPORTS_64BIT_KERNEL
1027 depends on EXPERIMENTAL
1029 depends on SYS_HAS_CPU_R6000
1030 select CPU_SUPPORTS_32BIT_KERNEL
1032 MIPS Technologies R6000 and R6000A series processors. Note these
1033 processors are extremely rare and the support for them is incomplete.
1037 depends on SYS_HAS_CPU_NEVADA
1039 select CPU_SUPPORTS_32BIT_KERNEL
1040 select CPU_SUPPORTS_64BIT_KERNEL
1042 QED / PMC-Sierra RM52xx-series ("Nevada") processors.
1046 depends on EXPERIMENTAL
1047 depends on SYS_HAS_CPU_R8000
1049 select CPU_HAS_PREFETCH
1050 select CPU_SUPPORTS_64BIT_KERNEL
1052 MIPS Technologies R8000 processors. Note these processors are
1053 uncommon and the support for them is incomplete.
1057 depends on SYS_HAS_CPU_R10000
1059 select CPU_HAS_PREFETCH
1060 select CPU_SUPPORTS_32BIT_KERNEL
1061 select CPU_SUPPORTS_64BIT_KERNEL
1062 select CPU_SUPPORTS_HIGHMEM
1064 MIPS Technologies R10000-series processors.
1068 depends on SYS_HAS_CPU_RM7000
1070 select CPU_HAS_PREFETCH
1071 select CPU_SUPPORTS_32BIT_KERNEL
1072 select CPU_SUPPORTS_64BIT_KERNEL
1073 select CPU_SUPPORTS_HIGHMEM
1077 depends on SYS_HAS_CPU_RM9000
1079 select CPU_HAS_PREFETCH
1080 select CPU_SUPPORTS_32BIT_KERNEL
1081 select CPU_SUPPORTS_64BIT_KERNEL
1082 select CPU_SUPPORTS_HIGHMEM
1083 select WEAK_ORDERING
1087 depends on SYS_HAS_CPU_SB1
1089 select CPU_SUPPORTS_32BIT_KERNEL
1090 select CPU_SUPPORTS_64BIT_KERNEL
1091 select CPU_SUPPORTS_HIGHMEM
1092 select WEAK_ORDERING
1096 config SYS_HAS_CPU_LOONGSON2
1099 config SYS_HAS_CPU_MIPS32_R1
1102 config SYS_HAS_CPU_MIPS32_R2
1105 config SYS_HAS_CPU_MIPS64_R1
1108 config SYS_HAS_CPU_MIPS64_R2
1111 config SYS_HAS_CPU_R3000
1114 config SYS_HAS_CPU_TX39XX
1117 config SYS_HAS_CPU_VR41XX
1120 config SYS_HAS_CPU_R4300
1123 config SYS_HAS_CPU_R4X00
1126 config SYS_HAS_CPU_TX49XX
1129 config SYS_HAS_CPU_R5000
1132 config SYS_HAS_CPU_R5432
1135 config SYS_HAS_CPU_R6000
1138 config SYS_HAS_CPU_NEVADA
1141 config SYS_HAS_CPU_R8000
1144 config SYS_HAS_CPU_R10000
1147 config SYS_HAS_CPU_RM7000
1150 config SYS_HAS_CPU_RM9000
1153 config SYS_HAS_CPU_SB1
1157 # CPU may reorder R->R, R->W, W->R, W->W
1158 # Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
1160 config WEAK_ORDERING
1164 # CPU may reorder reads and writes beyond LL/SC
1165 # CPU may reorder R->LL, R->LL, W->LL, W->LL, R->SC, R->SC, W->SC, W->SC
1167 config WEAK_REORDERING_BEYOND_LLSC
1172 # These two indicate any level of the MIPS32 and MIPS64 architecture
1176 default y if CPU_MIPS32_R1 || CPU_MIPS32_R2
1180 default y if CPU_MIPS64_R1 || CPU_MIPS64_R2
1183 # These two indicate the revision of the architecture, either Release 1 or Release 2
1187 default y if CPU_MIPS32_R1 || CPU_MIPS64_R1
1191 default y if CPU_MIPS32_R2 || CPU_MIPS64_R2
1193 config SYS_SUPPORTS_32BIT_KERNEL
1195 config SYS_SUPPORTS_64BIT_KERNEL
1197 config CPU_SUPPORTS_32BIT_KERNEL
1199 config CPU_SUPPORTS_64BIT_KERNEL
1206 prompt "Kernel code model"
1208 You should only select this option if you have a workload that
1209 actually benefits from 64-bit processing or if your machine has
1210 large memory. You will only be presented a single option in this
1211 menu if your system does not support both 32-bit and 64-bit kernels.
1214 bool "32-bit kernel"
1215 depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
1218 Select this option if you want to build a 32-bit kernel.
1220 bool "64-bit kernel"
1221 depends on CPU_SUPPORTS_64BIT_KERNEL && SYS_SUPPORTS_64BIT_KERNEL
1223 Select this option if you want to build a 64-bit kernel.
1228 prompt "Kernel page size"
1229 default PAGE_SIZE_4KB
1231 config PAGE_SIZE_4KB
1234 This option select the standard 4kB Linux page size. On some
1235 R3000-family processors this is the only available page size. Using
1236 4kB page size will minimize memory consumption and is therefore
1237 recommended for low memory systems.
1239 config PAGE_SIZE_8KB
1241 depends on EXPERIMENTAL && CPU_R8000
1243 Using 8kB page size will result in higher performance kernel at
1244 the price of higher memory consumption. This option is available
1245 only on the R8000 processor. Not that at the time of this writing
1246 this option is still high experimental; there are also issues with
1247 compatibility of user applications.
1249 config PAGE_SIZE_16KB
1251 depends on !CPU_R3000 && !CPU_TX39XX
1253 Using 16kB page size will result in higher performance kernel at
1254 the price of higher memory consumption. This option is available on
1255 all non-R3000 family processors. Note that you will need a suitable
1256 Linux distribution to support this.
1258 config PAGE_SIZE_64KB
1260 depends on EXPERIMENTAL && !CPU_R3000 && !CPU_TX39XX
1262 Using 64kB page size will result in higher performance kernel at
1263 the price of higher memory consumption. This option is available on
1264 all non-R3000 family processor. Not that at the time of this
1265 writing this option is still high experimental.
1272 config IP22_CPU_SCACHE
1277 # Support for a MIPS32 / MIPS64 style S-caches
1279 config MIPS_CPU_SCACHE
1283 config R5000_CPU_SCACHE
1287 config RM7000_CPU_SCACHE
1291 config SIBYTE_DMA_PAGEOPS
1292 bool "Use DMA to clear/copy pages"
1295 Instead of using the CPU to zero and copy pages, use a Data Mover
1296 channel. These DMA channels are otherwise unused by the standard
1297 SiByte Linux port. Seems to give a small performance benefit.
1299 config CPU_HAS_PREFETCH
1303 prompt "MIPS MT options"
1305 config MIPS_MT_DISABLED
1306 bool "Disable multithreading support."
1308 Use this option if your workload can't take advantage of
1309 MIPS hardware multithreading support. On systems that don't have
1310 the option of an MT-enabled processor this option will be the only
1311 option in this menu.
1314 bool "Use 1 TC on each available VPE for SMP"
1315 depends on SYS_SUPPORTS_MULTITHREADING
1316 select CPU_MIPSR2_IRQ_VI
1317 select CPU_MIPSR2_IRQ_EI
1318 select CPU_MIPSR2_SRS
1320 select NR_CPUS_DEFAULT_2
1322 select SYS_SUPPORTS_SMP
1324 This is a kernel model which is also known a VSMP or lately
1325 has been marketesed into SMVP.
1328 bool "SMTC: Use all TCs on all VPEs for SMP"
1329 depends on CPU_MIPS32_R2
1330 #depends on CPU_MIPS64_R2 # once there is hardware ...
1331 depends on SYS_SUPPORTS_MULTITHREADING
1332 select CPU_MIPSR2_IRQ_VI
1333 select CPU_MIPSR2_IRQ_EI
1334 select CPU_MIPSR2_SRS
1336 select NR_CPUS_DEFAULT_8
1338 select SYS_SUPPORTS_SMP
1340 This is a kernel model which is known a SMTC or lately has been
1341 marketesed into SMVP.
1348 config SYS_SUPPORTS_MULTITHREADING
1351 config MIPS_MT_FPAFF
1352 bool "Dynamic FPU affinity for FP-intensive threads"
1354 depends on MIPS_MT_SMP || MIPS_MT_SMTC
1356 config MIPS_VPE_LOADER
1357 bool "VPE loader support."
1358 depends on SYS_SUPPORTS_MULTITHREADING
1359 select CPU_MIPSR2_IRQ_VI
1360 select CPU_MIPSR2_IRQ_EI
1361 select CPU_MIPSR2_SRS
1364 Includes a loader for loading an elf relocatable object
1365 onto another VPE and running it.
1367 config MIPS_MT_SMTC_INSTANT_REPLAY
1368 bool "Low-latency Dispatch of Deferred SMTC IPIs"
1369 depends on MIPS_MT_SMTC && !PREEMPT
1372 SMTC pseudo-interrupts between TCs are deferred and queued
1373 if the target TC is interrupt-inhibited (IXMT). In the first
1374 SMTC prototypes, these queued IPIs were serviced on return
1375 to user mode, or on entry into the kernel idle loop. The
1376 INSTANT_REPLAY option dispatches them as part of local_irq_restore()
1377 processing, which adds runtime overhead (hence the option to turn
1378 it off), but ensures that IPIs are handled promptly even under
1379 heavy I/O interrupt load.
1381 config MIPS_MT_SMTC_IM_BACKSTOP
1382 bool "Use per-TC register bits as backstop for inhibited IM bits"
1383 depends on MIPS_MT_SMTC
1386 To support multiple TC microthreads acting as "CPUs" within
1387 a VPE, VPE-wide interrupt mask bits must be specially manipulated
1388 during interrupt handling. To support legacy drivers and interrupt
1389 controller management code, SMTC has a "backstop" to track and
1390 if necessary restore the interrupt mask. This has some performance
1391 impact on interrupt service overhead. Disable it only if you know
1394 config MIPS_VPE_LOADER_TOM
1395 bool "Load VPE program into memory hidden from linux"
1396 depends on MIPS_VPE_LOADER
1399 The loader can use memory that is present but has been hidden from
1400 Linux using the kernel command line option "mem=xxMB". It's up to
1401 you to ensure the amount you put in the option and the space your
1402 program requires is less or equal to the amount physically present.
1404 # this should possibly be in drivers/char, but it is rather cpu related. Hmmm
1405 config MIPS_VPE_APSP_API
1406 bool "Enable support for AP/SP API (RTLX)"
1407 depends on MIPS_VPE_LOADER
1410 config MIPS_APSP_KSPD
1412 depends on MIPS_VPE_APSP_API
1415 KSPD is a kernel daemon that accepts syscall requests from the SP
1416 side, actions them and returns the results. It also handles the
1417 "exit" syscall notifying other kernel modules the SP program is
1418 exiting. You probably want to say yes here.
1420 config SB1_PASS_1_WORKAROUNDS
1422 depends on CPU_SB1_PASS_1
1425 config SB1_PASS_2_WORKAROUNDS
1427 depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
1430 config SB1_PASS_2_1_WORKAROUNDS
1432 depends on CPU_SB1 && CPU_SB1_PASS_2
1435 config 64BIT_PHYS_ADDR
1441 config CPU_HAS_SMARTMIPS
1442 depends on SYS_SUPPORTS_SMARTMIPS
1443 bool "Support for the SmartMIPS ASE"
1445 SmartMIPS is a extension of the MIPS32 architecture aimed at
1446 increased security at both hardware and software level for
1447 smartcards. Enabling this option will allow proper use of the
1448 SmartMIPS instructions by Linux applications. However a kernel with
1449 this option will not work on a MIPS core without SmartMIPS core. If
1450 you don't know you probably don't have SmartMIPS and should say N
1456 config 64BIT_CONTEXT
1457 bool "Save 64bit integer registers"
1458 depends on 32BIT && CPU_LOONGSON2
1460 Loongson2 CPU is 64bit , when used in 32BIT mode, its integer
1461 registers can still be accessed as 64bit, mainly for multimedia
1462 instructions. We must have all 64bit save/restored to make sure
1463 those instructions to get correct result.
1466 # Vectored interrupt mode is an R2 feature
1468 config CPU_MIPSR2_IRQ_VI
1472 # Extended interrupt mode is an R2 feature
1474 config CPU_MIPSR2_IRQ_EI
1478 # Shadow registers are an R2 feature
1480 config CPU_MIPSR2_SRS
1485 depends on !CPU_R3000
1489 # Use the generic interrupt handling code in kernel/irq/:
1491 config GENERIC_HARDIRQS
1495 config GENERIC_IRQ_PROBE
1503 # - Highmem only makes sense for the 32-bit kernel.
1504 # - The current highmem code will only work properly on physically indexed
1505 # caches such as R3000, SB1, R7000 or those that look like they're virtually
1506 # indexed such as R4000/R4400 SC and MC versions or R10000. So for the
1507 # moment we protect the user and offer the highmem option only on machines
1508 # where it's known to be safe. This will not offer highmem on a few systems
1509 # such as MIPS32 and MIPS64 CPUs which may have virtual and physically
1510 # indexed CPUs but we're playing safe.
1511 # - We use SYS_SUPPORTS_HIGHMEM to offer highmem only for systems where we
1512 # know they might have memory configurations that could make use of highmem
1516 bool "High Memory Support"
1517 depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
1519 config CPU_SUPPORTS_HIGHMEM
1522 config SYS_SUPPORTS_HIGHMEM
1525 config SYS_SUPPORTS_SMARTMIPS
1528 config ARCH_FLATMEM_ENABLE
1532 config ARCH_DISCONTIGMEM_ENABLE
1534 default y if SGI_IP27
1536 Say Y to support efficient handling of discontiguous physical memory,
1537 for architectures which are either NUMA (Non-Uniform Memory Access)
1538 or have huge holes in the physical address space for other reasons.
1539 See <file:Documentation/vm/numa> for more.
1541 config ARCH_SPARSEMEM_ENABLE
1543 select SPARSEMEM_STATIC
1547 depends on SYS_SUPPORTS_NUMA
1549 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1550 Access). This option improves performance on systems with more
1551 than two nodes; on two node systems it is generally better to
1552 leave it disabled; on single node systems disable this option
1555 config SYS_SUPPORTS_NUMA
1561 depends on NEED_MULTIPLE_NODES
1566 bool "Multi-Processing support"
1567 depends on SYS_SUPPORTS_SMP
1570 This enables support for systems with more than one CPU. If you have
1571 a system with only one CPU, like most personal computers, say N. If
1572 you have a system with more than one CPU, say Y.
1574 If you say N here, the kernel will run on single and multiprocessor
1575 machines, but will use only one CPU of a multiprocessor machine. If
1576 you say Y here, the kernel will run on many, but not all,
1577 singleprocessor machines. On a singleprocessor machine, the kernel
1578 will run faster if you say N here.
1580 People using multiprocessor machines who say Y here should also say
1581 Y to "Enhanced Real Time Clock Support", below.
1583 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
1584 available at <http://www.tldp.org/docs.html#howto>.
1586 If you don't know what to do here, say N.
1588 config SYS_SUPPORTS_SMP
1591 config NR_CPUS_DEFAULT_1
1594 config NR_CPUS_DEFAULT_2
1597 config NR_CPUS_DEFAULT_4
1600 config NR_CPUS_DEFAULT_8
1603 config NR_CPUS_DEFAULT_16
1606 config NR_CPUS_DEFAULT_32
1609 config NR_CPUS_DEFAULT_64
1613 int "Maximum number of CPUs (2-64)"
1614 range 1 64 if NR_CPUS_DEFAULT_1
1616 default "1" if NR_CPUS_DEFAULT_1
1617 default "2" if NR_CPUS_DEFAULT_2
1618 default "4" if NR_CPUS_DEFAULT_4
1619 default "8" if NR_CPUS_DEFAULT_8
1620 default "16" if NR_CPUS_DEFAULT_16
1621 default "32" if NR_CPUS_DEFAULT_32
1622 default "64" if NR_CPUS_DEFAULT_64
1624 This allows you to specify the maximum number of CPUs which this
1625 kernel will support. The maximum supported value is 32 for 32-bit
1626 kernel and 64 for 64-bit kernels; the minimum value which makes
1627 sense is 1 for Qemu (useful only for kernel debugging purposes)
1628 and 2 for all others.
1630 This is purely to save memory - each supported CPU adds
1631 approximately eight kilobytes to the kernel image. For best
1632 performance should round up your number of processors to the next
1636 # Timer Interrupt Frequency Configuration
1640 prompt "Timer frequency"
1643 Allows the configuration of the timer frequency.
1646 bool "48 HZ" if SYS_SUPPORTS_48HZ
1649 bool "100 HZ" if SYS_SUPPORTS_100HZ || SYS_SUPPORTS_ARBIT_HZ
1652 bool "128 HZ" if SYS_SUPPORTS_128HZ || SYS_SUPPORTS_ARBIT_HZ
1655 bool "250 HZ" if SYS_SUPPORTS_250HZ || SYS_SUPPORTS_ARBIT_HZ
1658 bool "256 HZ" if SYS_SUPPORTS_256HZ || SYS_SUPPORTS_ARBIT_HZ
1661 bool "1000 HZ" if SYS_SUPPORTS_1000HZ || SYS_SUPPORTS_ARBIT_HZ
1664 bool "1024 HZ" if SYS_SUPPORTS_1024HZ || SYS_SUPPORTS_ARBIT_HZ
1668 config SYS_SUPPORTS_48HZ
1671 config SYS_SUPPORTS_100HZ
1674 config SYS_SUPPORTS_128HZ
1677 config SYS_SUPPORTS_250HZ
1680 config SYS_SUPPORTS_256HZ
1683 config SYS_SUPPORTS_1000HZ
1686 config SYS_SUPPORTS_1024HZ
1689 config SYS_SUPPORTS_ARBIT_HZ
1691 default y if !SYS_SUPPORTS_48HZ && !SYS_SUPPORTS_100HZ && \
1692 !SYS_SUPPORTS_128HZ && !SYS_SUPPORTS_250HZ && \
1693 !SYS_SUPPORTS_256HZ && !SYS_SUPPORTS_1000HZ && \
1694 !SYS_SUPPORTS_1024HZ
1699 default 100 if HZ_100
1700 default 128 if HZ_128
1701 default 250 if HZ_250
1702 default 256 if HZ_256
1703 default 1000 if HZ_1000
1704 default 1024 if HZ_1024
1706 source "kernel/Kconfig.preempt"
1708 config MIPS_INSANE_LARGE
1709 bool "Support for large 64-bit configurations"
1710 depends on CPU_R10000 && 64BIT
1712 MIPS R10000 does support a 44 bit / 16TB address space as opposed to
1713 previous 64-bit processors which only supported 40 bit / 1TB. If you
1714 need processes of more than 1TB virtual address space, say Y here.
1715 This will result in additional memory usage, so it is not
1716 recommended for normal users.
1719 bool "Kexec system call (EXPERIMENTAL)"
1720 depends on EXPERIMENTAL
1722 kexec is a system call that implements the ability to shutdown your
1723 current kernel, and to start another kernel. It is like a reboot
1724 but it is independent of the system firmware. And like a reboot
1725 you can start any kernel with it, not just Linux.
1727 The name comes from the similiarity to the exec system call.
1729 It is an ongoing process to be certain the hardware in a machine
1730 is properly shutdown, so do not be surprised if this code does not
1731 initially work for you. It may help to enable device hotplugging
1732 support. As of this writing the exact hardware interface is
1733 strongly in flux, so no good recommendation can be made.
1736 bool "Enable seccomp to safely compute untrusted bytecode"
1740 This kernel feature is useful for number crunching applications
1741 that may need to compute untrusted bytecode during their
1742 execution. By using pipes or other transports made available to
1743 the process as file descriptors supporting the read/write
1744 syscalls, it's possible to isolate those applications in
1745 their own address space using seccomp. Once seccomp is
1746 enabled via /proc/<pid>/seccomp, it cannot be disabled
1747 and the task is only allowed to execute a few safe syscalls
1748 defined by each seccomp mode.
1750 If unsure, say Y. Only embedded should say N here.
1754 config RWSEM_GENERIC_SPINLOCK
1758 config LOCKDEP_SUPPORT
1762 config STACKTRACE_SUPPORT
1766 source "init/Kconfig"
1768 menu "Bus options (PCI, PCMCIA, EISA, ISA, TC)"
1776 bool "Support for PCI controller"
1777 depends on HW_HAS_PCI
1779 Find out whether you have a PCI motherboard. PCI is the name of a
1780 bus system, i.e. the way the CPU talks to the other stuff inside
1781 your box. Other bus systems are ISA, EISA, or VESA. If you have PCI,
1784 The PCI-HOWTO, available from
1785 <http://www.tldp.org/docs.html#howto>, contains valuable
1786 information about which PCI hardware does work under Linux and which
1793 source "drivers/pci/Kconfig"
1796 # ISA support is now enabled via select. Too many systems still have the one
1797 # or other ISA chip on the board that users don't know about so don't expect
1798 # users to choose the right thing ...
1805 depends on HW_HAS_EISA
1807 select GENERIC_ISA_DMA
1809 The Extended Industry Standard Architecture (EISA) bus was
1810 developed as an open alternative to the IBM MicroChannel bus.
1812 The EISA bus provided some of the features of the IBM MicroChannel
1813 bus while maintaining backward compatibility with cards made for
1814 the older ISA bus. The EISA bus saw limited use between 1988 and
1815 1995 when it was made obsolete by the PCI bus.
1817 Say Y here if you are building a kernel for an EISA-based machine.
1821 source "drivers/eisa/Kconfig"
1824 bool "TURBOchannel support"
1825 depends on MACH_DECSTATION
1827 TurboChannel is a DEC (now Compaq (now HP)) bus for Alpha and MIPS
1828 processors. Documentation on writing device drivers for TurboChannel
1830 <http://www.cs.arizona.edu/computer.help/policy/DIGITAL_unix/AA-PS3HD-TET1_html/TITLE.html>.
1833 # bool "Access.Bus support"
1843 source "drivers/pcmcia/Kconfig"
1845 source "drivers/pci/hotplug/Kconfig"
1849 menu "Executable file formats"
1851 source "fs/Kconfig.binfmt"
1857 bool "Use 64-bit ELF format for building"
1860 A 64-bit kernel is usually built using the 64-bit ELF binary object
1861 format as it's one that allows arbitrary 64-bit constructs. For
1862 kernels that are loaded within the KSEG compatibility segments the
1863 32-bit ELF format can optionally be used resulting in a somewhat
1864 smaller binary, but this option is not explicitly supported by the
1865 toolchain and since binutils 2.14 it does not even work at all.
1867 Say Y to use the 64-bit format or N to use the 32-bit one.
1872 bool "Include IRIX binary compatibility"
1873 depends on CPU_BIG_ENDIAN && 32BIT && BROKEN
1875 config MIPS32_COMPAT
1876 bool "Kernel support for Linux/MIPS 32-bit binary compatibility"
1879 Select this option if you want Linux/MIPS 32-bit binary
1880 compatibility. Since all software available for Linux/MIPS is
1881 currently 32-bit you should say Y here.
1885 depends on MIPS32_COMPAT
1888 config SYSVIPC_COMPAT
1890 depends on COMPAT && SYSVIPC
1894 bool "Kernel support for o32 binaries"
1895 depends on MIPS32_COMPAT
1897 Select this option if you want to run o32 binaries. These are pure
1898 32-bit binaries as used by the 32-bit Linux/MIPS port. Most of
1899 existing binaries are in this format.
1904 bool "Kernel support for n32 binaries"
1905 depends on MIPS32_COMPAT
1907 Select this option if you want to run n32 binaries. These are
1908 64-bit binaries using 32-bit quantities for addressing and certain
1909 data that would normally be 64-bit. They are used in special
1916 default y if MIPS32_O32 || MIPS32_N32
1920 menu "Power management options"
1922 source "kernel/power/Kconfig"
1926 source "net/Kconfig"
1928 source "drivers/Kconfig"
1932 source "arch/mips/oprofile/Kconfig"
1934 source "arch/mips/Kconfig.debug"
1936 source "security/Kconfig"
1938 source "crypto/Kconfig"
1940 source "lib/Kconfig"