1 comment "Processor Type"
7 # Select CPU types depending on the architecture selected. This selects
8 # which CPUs we support in the kernel image, and the compiler instruction
13 bool "Support ARM610 processor" if ARCH_RPC
18 select CPU_COPY_V3 if MMU
19 select CPU_TLB_V3 if MMU
20 select CPU_PABRT_NOIFAR
22 The ARM610 is the successor to the ARM3 processor
23 and was produced by VLSI Technology Inc.
25 Say Y if you want support for the ARM610 processor.
30 bool "Support ARM7TDMI processor"
34 select CPU_PABRT_NOIFAR
37 A 32-bit RISC microprocessor based on the ARM7 processor core
38 which has no memory control unit and cache.
40 Say Y if you want support for the ARM7TDMI processor.
45 bool "Support ARM710 processor" if ARCH_RPC
50 select CPU_COPY_V3 if MMU
51 select CPU_TLB_V3 if MMU
52 select CPU_PABRT_NOIFAR
54 A 32-bit RISC microprocessor based on the ARM7 processor core
55 designed by Advanced RISC Machines Ltd. The ARM710 is the
56 successor to the ARM610 processor. It was released in
57 July 1994 by VLSI Technology Inc.
59 Say Y if you want support for the ARM710 processor.
64 bool "Support ARM720T processor" if ARCH_INTEGRATOR
67 select CPU_PABRT_NOIFAR
71 select CPU_COPY_V4WT if MMU
72 select CPU_TLB_V4WT if MMU
74 A 32-bit RISC processor with 8kByte Cache, Write Buffer and
75 MMU built around an ARM7TDMI core.
77 Say Y if you want support for the ARM720T processor.
82 bool "Support ARM740T processor" if ARCH_INTEGRATOR
86 select CPU_PABRT_NOIFAR
87 select CPU_CACHE_V3 # although the core is v4t
90 A 32-bit RISC processor with 8KB cache or 4KB variants,
91 write buffer and MPU(Protection Unit) built around
94 Say Y if you want support for the ARM740T processor.
99 bool "Support ARM9TDMI processor"
102 select CPU_ABRT_NOMMU
103 select CPU_PABRT_NOIFAR
106 A 32-bit RISC microprocessor based on the ARM9 processor core
107 which has no memory control unit and cache.
109 Say Y if you want support for the ARM9TDMI processor.
114 bool "Support ARM920T processor" if ARCH_INTEGRATOR
117 select CPU_PABRT_NOIFAR
118 select CPU_CACHE_V4WT
119 select CPU_CACHE_VIVT
121 select CPU_COPY_V4WB if MMU
122 select CPU_TLB_V4WBI if MMU
124 The ARM920T is licensed to be produced by numerous vendors,
125 and is used in the Maverick EP9312 and the Samsung S3C2410.
127 More information on the Maverick EP9312 at
128 <http://linuxdevices.com/products/PD2382866068.html>.
130 Say Y if you want support for the ARM920T processor.
135 bool "Support ARM922T processor" if ARCH_INTEGRATOR
138 select CPU_PABRT_NOIFAR
139 select CPU_CACHE_V4WT
140 select CPU_CACHE_VIVT
142 select CPU_COPY_V4WB if MMU
143 select CPU_TLB_V4WBI if MMU
145 The ARM922T is a version of the ARM920T, but with smaller
146 instruction and data caches. It is used in Altera's
147 Excalibur XA device family and Micrel's KS8695 Centaur.
149 Say Y if you want support for the ARM922T processor.
154 bool "Support ARM925T processor" if ARCH_OMAP1
157 select CPU_PABRT_NOIFAR
158 select CPU_CACHE_V4WT
159 select CPU_CACHE_VIVT
161 select CPU_COPY_V4WB if MMU
162 select CPU_TLB_V4WBI if MMU
164 The ARM925T is a mix between the ARM920T and ARM926T, but with
165 different instruction and data caches. It is used in TI's OMAP
168 Say Y if you want support for the ARM925T processor.
173 bool "Support ARM926T processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB
175 select CPU_ABRT_EV5TJ
176 select CPU_PABRT_NOIFAR
177 select CPU_CACHE_VIVT
179 select CPU_COPY_V4WB if MMU
180 select CPU_TLB_V4WBI if MMU
182 This is a variant of the ARM920. It has slightly different
183 instruction sequences for cache and TLB operations. Curiously,
184 there is no documentation on it at the ARM corporate website.
186 Say Y if you want support for the ARM926T processor.
191 bool "Support ARM940T processor" if ARCH_INTEGRATOR
194 select CPU_ABRT_NOMMU
195 select CPU_PABRT_NOIFAR
196 select CPU_CACHE_VIVT
199 ARM940T is a member of the ARM9TDMI family of general-
200 purpose microprocessors with MPU and separate 4KB
201 instruction and 4KB data cases, each with a 4-word line
204 Say Y if you want support for the ARM940T processor.
209 bool "Support ARM946E-S processor" if ARCH_INTEGRATOR
212 select CPU_ABRT_NOMMU
213 select CPU_PABRT_NOIFAR
214 select CPU_CACHE_VIVT
217 ARM946E-S is a member of the ARM9E-S family of high-
218 performance, 32-bit system-on-chip processor solutions.
219 The TCM and ARMv5TE 32-bit instruction set is supported.
221 Say Y if you want support for the ARM946E-S processor.
224 # ARM1020 - needs validating
226 bool "Support ARM1020T (rev 0) processor" if ARCH_INTEGRATOR
229 select CPU_PABRT_NOIFAR
230 select CPU_CACHE_V4WT
231 select CPU_CACHE_VIVT
233 select CPU_COPY_V4WB if MMU
234 select CPU_TLB_V4WBI if MMU
236 The ARM1020 is the 32K cached version of the ARM10 processor,
237 with an addition of a floating-point unit.
239 Say Y if you want support for the ARM1020 processor.
242 # ARM1020E - needs validating
244 bool "Support ARM1020E processor" if ARCH_INTEGRATOR
247 select CPU_PABRT_NOIFAR
248 select CPU_CACHE_V4WT
249 select CPU_CACHE_VIVT
251 select CPU_COPY_V4WB if MMU
252 select CPU_TLB_V4WBI if MMU
257 bool "Support ARM1022E processor" if ARCH_INTEGRATOR
260 select CPU_PABRT_NOIFAR
261 select CPU_CACHE_VIVT
263 select CPU_COPY_V4WB if MMU # can probably do better
264 select CPU_TLB_V4WBI if MMU
266 The ARM1022E is an implementation of the ARMv5TE architecture
267 based upon the ARM10 integer core with a 16KiB L1 Harvard cache,
268 embedded trace macrocell, and a floating-point unit.
270 Say Y if you want support for the ARM1022E processor.
275 bool "Support ARM1026EJ-S processor" if ARCH_INTEGRATOR
277 select CPU_ABRT_EV5T # But need Jazelle, but EV5TJ ignores bit 10
278 select CPU_PABRT_NOIFAR
279 select CPU_CACHE_VIVT
281 select CPU_COPY_V4WB if MMU # can probably do better
282 select CPU_TLB_V4WBI if MMU
284 The ARM1026EJ-S is an implementation of the ARMv5TEJ architecture
285 based upon the ARM10 integer core.
287 Say Y if you want support for the ARM1026EJ-S processor.
292 bool "Support StrongARM(R) SA-110 processor" if ARCH_RPC
293 select CPU_32v3 if ARCH_RPC
294 select CPU_32v4 if !ARCH_RPC
296 select CPU_PABRT_NOIFAR
297 select CPU_CACHE_V4WB
298 select CPU_CACHE_VIVT
300 select CPU_COPY_V4WB if MMU
301 select CPU_TLB_V4WB if MMU
303 The Intel StrongARM(R) SA-110 is a 32-bit microprocessor and
304 is available at five speeds ranging from 100 MHz to 233 MHz.
305 More information is available at
306 <http://developer.intel.com/design/strong/sa110.htm>.
308 Say Y if you want support for the SA-110 processor.
316 select CPU_PABRT_NOIFAR
317 select CPU_CACHE_V4WB
318 select CPU_CACHE_VIVT
320 select CPU_TLB_V4WB if MMU
327 select CPU_PABRT_NOIFAR
328 select CPU_CACHE_VIVT
330 select CPU_TLB_V4WBI if MMU
332 # XScale Core Version 3
337 select CPU_PABRT_NOIFAR
338 select CPU_CACHE_VIVT
340 select CPU_TLB_V4WBI if MMU
348 select CPU_PABRT_NOIFAR
349 select CPU_CACHE_VIVT
351 select CPU_COPY_FEROCEON if MMU
352 select CPU_TLB_FEROCEON if MMU
354 config CPU_FEROCEON_OLD_ID
355 bool "Accept early Feroceon cores with an ARM926 ID"
356 depends on CPU_FEROCEON && !CPU_ARM926T
359 This enables the usage of some old Feroceon cores
360 for which the CPU ID is equal to the ARM926 ID.
361 Relevant for Feroceon-1850 and early Feroceon-2850.
365 bool "Support ARM V6 processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB
368 select CPU_PABRT_NOIFAR
370 select CPU_CACHE_VIPT
372 select CPU_HAS_ASID if MMU
373 select CPU_COPY_V6 if MMU
374 select CPU_TLB_V6 if MMU
378 bool "Support ARM V6K processor extensions" if !SMP
380 default y if SMP && !ARCH_MX3
382 Say Y here if your ARMv6 processor supports the 'K' extension.
383 This enables the kernel to use some instructions not present
384 on previous processors, and as such a kernel build with this
385 enabled will not boot on processors with do not support these
390 bool "Support ARM V7 processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB
394 select CPU_PABRT_IFAR
396 select CPU_CACHE_VIPT
398 select CPU_HAS_ASID if MMU
399 select CPU_COPY_V6 if MMU
400 select CPU_TLB_V7 if MMU
402 # Figure out what processor architecture version we should be using.
403 # This defines the compiler instruction set which depends on the machine type.
406 select TLS_REG_EMUL if SMP || !MMU
407 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
411 select TLS_REG_EMUL if SMP || !MMU
412 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
416 select TLS_REG_EMUL if SMP || !MMU
417 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
421 select TLS_REG_EMUL if SMP || !MMU
422 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
426 select TLS_REG_EMUL if !CPU_32v6K && !MMU
432 config CPU_ABRT_NOMMU
447 config CPU_ABRT_EV5TJ
456 config CPU_PABRT_IFAR
459 config CPU_PABRT_NOIFAR
469 config CPU_CACHE_V4WT
472 config CPU_CACHE_V4WB
481 config CPU_CACHE_VIVT
484 config CPU_CACHE_VIPT
488 # The copy-page model
498 config CPU_COPY_FEROCEON
504 # This selects the TLB model
508 ARM Architecture Version 3 TLB.
513 ARM Architecture Version 4 TLB with writethrough cache.
518 ARM Architecture Version 4 TLB with writeback cache.
523 ARM Architecture Version 4 TLB with writeback cache and invalidate
524 instruction cache entry.
526 config CPU_TLB_FEROCEON
529 Feroceon TLB (v4wbi with non-outer-cachable page table walks).
542 This indicates whether the CPU has the ASID register; used to
543 tag TLB and possibly cache entries.
548 Processor has the CP15 register.
554 Processor has the CP15 register, which has MMU related registers.
560 Processor has the CP15 register, which has MPU related registers.
563 # CPU supports 36-bit I/O
568 comment "Processor Features"
571 bool "Support Thumb user binaries"
572 depends on CPU_ARM720T || CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_XSC3 || CPU_V6 || CPU_V7 || CPU_FEROCEON
575 Say Y if you want to include kernel support for running user space
578 The Thumb instruction set is a compressed form of the standard ARM
579 instruction set resulting in smaller binaries at the expense of
580 slightly less efficient code.
582 If you don't know what this all is, saying Y is a safe choice.
585 bool "Enable ThumbEE CPU extension"
588 Say Y here if you have a CPU with the ThumbEE extension and code to
589 make use of it. Say N for code that can run on CPUs without ThumbEE.
591 config CPU_BIG_ENDIAN
592 bool "Build big-endian kernel"
593 depends on ARCH_SUPPORTS_BIG_ENDIAN
595 Say Y if you plan on running a kernel in big-endian mode.
596 Note that your board must be properly built and your board
597 port must properly enable any big-endian related features
598 of your chipset/board/processor.
600 config CPU_HIGH_VECTOR
601 depends on !MMU && CPU_CP15 && !CPU_ARM740T
602 bool "Select the High exception vector"
605 Say Y here to select high exception vector(0xFFFF0000~).
606 The exception vector can be vary depending on the platform
607 design in nommu mode. If your platform needs to select
608 high exception vector, say Y.
609 Otherwise or if you are unsure, say N, and the low exception
610 vector (0x00000000~) will be used.
612 config CPU_ICACHE_DISABLE
613 bool "Disable I-Cache (I-bit)"
614 depends on CPU_CP15 && !(CPU_ARM610 || CPU_ARM710 || CPU_ARM720T || CPU_ARM740T || CPU_XSCALE || CPU_XSC3)
616 Say Y here to disable the processor instruction cache. Unless
617 you have a reason not to or are unsure, say N.
619 config CPU_DCACHE_DISABLE
620 bool "Disable D-Cache (C-bit)"
623 Say Y here to disable the processor data cache. Unless
624 you have a reason not to or are unsure, say N.
626 config CPU_DCACHE_SIZE
628 depends on CPU_ARM740T || CPU_ARM946E
629 default 0x00001000 if CPU_ARM740T
630 default 0x00002000 # default size for ARM946E-S
632 Some cores are synthesizable to have various sized cache. For
633 ARM946E-S case, it can vary from 0KB to 1MB.
634 To support such cache operations, it is efficient to know the size
636 If your SoC is configured to have a different size, define the value
637 here with proper conditions.
639 config CPU_DCACHE_WRITETHROUGH
640 bool "Force write through D-cache"
641 depends on (CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020) && !CPU_DCACHE_DISABLE
642 default y if CPU_ARM925T
644 Say Y here to use the data cache in writethrough mode. Unless you
645 specifically require this or are unsure, say N.
647 config CPU_CACHE_ROUND_ROBIN
648 bool "Round robin I and D cache replacement algorithm"
649 depends on (CPU_ARM926T || CPU_ARM946E || CPU_ARM1020) && (!CPU_ICACHE_DISABLE || !CPU_DCACHE_DISABLE)
651 Say Y here to use the predictable round-robin cache replacement
652 policy. Unless you specifically require this or are unsure, say N.
654 config CPU_BPREDICT_DISABLE
655 bool "Disable branch prediction"
656 depends on CPU_ARM1020 || CPU_V6 || CPU_XSC3 || CPU_V7
658 Say Y here to disable branch prediction. If unsure, say N.
663 An SMP system using a pre-ARMv6 processor (there are apparently
664 a few prototypes like that in existence) and therefore access to
665 that required register must be emulated.
669 depends on !TLS_REG_EMUL
670 default y if SMP || CPU_32v7
672 This selects support for the CP15 thread register.
673 It is defined to be available on some ARMv6 processors (including
674 all SMP capable ARMv6's) or later processors. User space may
675 assume directly accessing that register and always obtain the
676 expected value only on ARMv7 and above.
678 config NEEDS_SYSCALL_FOR_CMPXCHG
681 SMP on a pre-ARMv6 processor? Well OK then.
682 Forget about fast user space cmpxchg support.
683 It is just not possible.
689 config CACHE_FEROCEON_L2
690 bool "Enable the Feroceon L2 cache controller"
691 depends on ARCH_KIRKWOOD || ARCH_MV78XX0
695 This option enables the Feroceon L2 cache controller.
697 config CACHE_FEROCEON_L2_WRITETHROUGH
698 bool "Force Feroceon L2 cache write through"
699 depends on CACHE_FEROCEON_L2
702 Say Y here to use the Feroceon L2 cache in writethrough mode.
703 Unless you specifically require this, say N for writeback mode.
706 bool "Enable the L2x0 outer cache controller"
707 depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || MACH_REALVIEW_PB1176
711 This option enables the L2x0 PrimeCell.
714 bool "Enable the L2 cache on XScale3"
719 This option enables the L2 cache on XScale3.