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_LEGACY
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_LEGACY
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_LEGACY
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_LEGACY
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_LEGACY
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_LEGACY
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_LEGACY
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 Cirrus EP93xx and the Samsung S3C2410.
127 Say Y if you want support for the ARM920T processor.
132 bool "Support ARM922T processor" if ARCH_INTEGRATOR
135 select CPU_PABRT_LEGACY
136 select CPU_CACHE_V4WT
137 select CPU_CACHE_VIVT
139 select CPU_COPY_V4WB if MMU
140 select CPU_TLB_V4WBI if MMU
142 The ARM922T is a version of the ARM920T, but with smaller
143 instruction and data caches. It is used in Altera's
144 Excalibur XA device family and Micrel's KS8695 Centaur.
146 Say Y if you want support for the ARM922T processor.
151 bool "Support ARM925T processor" if ARCH_OMAP1
154 select CPU_PABRT_LEGACY
155 select CPU_CACHE_V4WT
156 select CPU_CACHE_VIVT
158 select CPU_COPY_V4WB if MMU
159 select CPU_TLB_V4WBI if MMU
161 The ARM925T is a mix between the ARM920T and ARM926T, but with
162 different instruction and data caches. It is used in TI's OMAP
165 Say Y if you want support for the ARM925T processor.
170 bool "Support ARM926T processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB
172 select CPU_ABRT_EV5TJ
173 select CPU_PABRT_LEGACY
174 select CPU_CACHE_VIVT
176 select CPU_COPY_V4WB if MMU
177 select CPU_TLB_V4WBI if MMU
179 This is a variant of the ARM920. It has slightly different
180 instruction sequences for cache and TLB operations. Curiously,
181 there is no documentation on it at the ARM corporate website.
183 Say Y if you want support for the ARM926T processor.
191 select CPU_PABRT_LEGACY
192 select CPU_CACHE_VIVT
195 select CPU_COPY_FA if MMU
196 select CPU_TLB_FA if MMU
198 The FA526 is a version of the ARMv4 compatible processor with
199 Branch Target Buffer, Unified TLB and cache line size 16.
201 Say Y if you want support for the FA526 processor.
206 bool "Support ARM940T processor" if ARCH_INTEGRATOR
209 select CPU_ABRT_NOMMU
210 select CPU_PABRT_LEGACY
211 select CPU_CACHE_VIVT
214 ARM940T is a member of the ARM9TDMI family of general-
215 purpose microprocessors with MPU and separate 4KB
216 instruction and 4KB data cases, each with a 4-word line
219 Say Y if you want support for the ARM940T processor.
224 bool "Support ARM946E-S processor" if ARCH_INTEGRATOR
227 select CPU_ABRT_NOMMU
228 select CPU_PABRT_LEGACY
229 select CPU_CACHE_VIVT
232 ARM946E-S is a member of the ARM9E-S family of high-
233 performance, 32-bit system-on-chip processor solutions.
234 The TCM and ARMv5TE 32-bit instruction set is supported.
236 Say Y if you want support for the ARM946E-S processor.
239 # ARM1020 - needs validating
241 bool "Support ARM1020T (rev 0) processor" if ARCH_INTEGRATOR
244 select CPU_PABRT_LEGACY
245 select CPU_CACHE_V4WT
246 select CPU_CACHE_VIVT
248 select CPU_COPY_V4WB if MMU
249 select CPU_TLB_V4WBI if MMU
251 The ARM1020 is the 32K cached version of the ARM10 processor,
252 with an addition of a floating-point unit.
254 Say Y if you want support for the ARM1020 processor.
257 # ARM1020E - needs validating
259 bool "Support ARM1020E processor" if ARCH_INTEGRATOR
262 select CPU_PABRT_LEGACY
263 select CPU_CACHE_V4WT
264 select CPU_CACHE_VIVT
266 select CPU_COPY_V4WB if MMU
267 select CPU_TLB_V4WBI if MMU
272 bool "Support ARM1022E processor" if ARCH_INTEGRATOR
275 select CPU_PABRT_LEGACY
276 select CPU_CACHE_VIVT
278 select CPU_COPY_V4WB if MMU # can probably do better
279 select CPU_TLB_V4WBI if MMU
281 The ARM1022E is an implementation of the ARMv5TE architecture
282 based upon the ARM10 integer core with a 16KiB L1 Harvard cache,
283 embedded trace macrocell, and a floating-point unit.
285 Say Y if you want support for the ARM1022E processor.
290 bool "Support ARM1026EJ-S processor" if ARCH_INTEGRATOR
292 select CPU_ABRT_EV5T # But need Jazelle, but EV5TJ ignores bit 10
293 select CPU_PABRT_LEGACY
294 select CPU_CACHE_VIVT
296 select CPU_COPY_V4WB if MMU # can probably do better
297 select CPU_TLB_V4WBI if MMU
299 The ARM1026EJ-S is an implementation of the ARMv5TEJ architecture
300 based upon the ARM10 integer core.
302 Say Y if you want support for the ARM1026EJ-S processor.
307 bool "Support StrongARM(R) SA-110 processor" if ARCH_RPC
308 select CPU_32v3 if ARCH_RPC
309 select CPU_32v4 if !ARCH_RPC
311 select CPU_PABRT_LEGACY
312 select CPU_CACHE_V4WB
313 select CPU_CACHE_VIVT
315 select CPU_COPY_V4WB if MMU
316 select CPU_TLB_V4WB if MMU
318 The Intel StrongARM(R) SA-110 is a 32-bit microprocessor and
319 is available at five speeds ranging from 100 MHz to 233 MHz.
320 More information is available at
321 <http://developer.intel.com/design/strong/sa110.htm>.
323 Say Y if you want support for the SA-110 processor.
331 select CPU_PABRT_LEGACY
332 select CPU_CACHE_V4WB
333 select CPU_CACHE_VIVT
335 select CPU_TLB_V4WB if MMU
342 select CPU_PABRT_LEGACY
343 select CPU_CACHE_VIVT
345 select CPU_TLB_V4WBI if MMU
347 # XScale Core Version 3
352 select CPU_PABRT_LEGACY
353 select CPU_CACHE_VIVT
355 select CPU_TLB_V4WBI if MMU
358 # Marvell PJ1 (Mohawk)
363 select CPU_PABRT_LEGACY
364 select CPU_CACHE_VIVT
366 select CPU_TLB_V4WBI if MMU
367 select CPU_COPY_V4WB if MMU
374 select CPU_PABRT_LEGACY
375 select CPU_CACHE_VIVT
377 select CPU_COPY_FEROCEON if MMU
378 select CPU_TLB_FEROCEON if MMU
380 config CPU_FEROCEON_OLD_ID
381 bool "Accept early Feroceon cores with an ARM926 ID"
382 depends on CPU_FEROCEON && !CPU_ARM926T
385 This enables the usage of some old Feroceon cores
386 for which the CPU ID is equal to the ARM926 ID.
387 Relevant for Feroceon-1850 and early Feroceon-2850.
391 bool "Support ARM V6 processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB || MACH_REALVIEW_PBX
396 select CPU_CACHE_VIPT
398 select CPU_HAS_ASID if MMU
399 select CPU_COPY_V6 if MMU
400 select CPU_TLB_V6 if MMU
404 bool "Support ARM V6K processor extensions" if !SMP
406 default y if SMP && !ARCH_MX3
408 Say Y here if your ARMv6 processor supports the 'K' extension.
409 This enables the kernel to use some instructions not present
410 on previous processors, and as such a kernel build with this
411 enabled will not boot on processors with do not support these
416 bool "Support ARM V7 processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB || MACH_REALVIEW_PBX
422 select CPU_CACHE_VIPT
424 select CPU_HAS_ASID if MMU
425 select CPU_COPY_V6 if MMU
426 select CPU_TLB_V7 if MMU
428 # Figure out what processor architecture version we should be using.
429 # This defines the compiler instruction set which depends on the machine type.
432 select TLS_REG_EMUL if SMP || !MMU
433 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
437 select TLS_REG_EMUL if SMP || !MMU
438 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
442 select TLS_REG_EMUL if SMP || !MMU
443 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
447 select TLS_REG_EMUL if SMP || !MMU
448 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
452 select TLS_REG_EMUL if !CPU_32v6K && !MMU
458 config CPU_ABRT_NOMMU
473 config CPU_ABRT_EV5TJ
482 config CPU_PABRT_LEGACY
498 config CPU_CACHE_V4WT
501 config CPU_CACHE_V4WB
510 config CPU_CACHE_VIVT
513 config CPU_CACHE_VIPT
520 # The copy-page model
530 config CPU_COPY_FEROCEON
539 # This selects the TLB model
543 ARM Architecture Version 3 TLB.
548 ARM Architecture Version 4 TLB with writethrough cache.
553 ARM Architecture Version 4 TLB with writeback cache.
558 ARM Architecture Version 4 TLB with writeback cache and invalidate
559 instruction cache entry.
561 config CPU_TLB_FEROCEON
564 Feroceon TLB (v4wbi with non-outer-cachable page table walks).
569 Faraday ARM FA526 architecture, unified TLB with writeback cache
570 and invalidate instruction cache entry. Branch target buffer is
584 This indicates whether the CPU has the ASID register; used to
585 tag TLB and possibly cache entries.
590 Processor has the CP15 register.
596 Processor has the CP15 register, which has MMU related registers.
602 Processor has the CP15 register, which has MPU related registers.
605 # CPU supports 36-bit I/O
610 comment "Processor Features"
613 bool "Support Thumb user binaries"
614 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_MOHAWK || CPU_V6 || CPU_V7 || CPU_FEROCEON
617 Say Y if you want to include kernel support for running user space
620 The Thumb instruction set is a compressed form of the standard ARM
621 instruction set resulting in smaller binaries at the expense of
622 slightly less efficient code.
624 If you don't know what this all is, saying Y is a safe choice.
627 bool "Enable ThumbEE CPU extension"
630 Say Y here if you have a CPU with the ThumbEE extension and code to
631 make use of it. Say N for code that can run on CPUs without ThumbEE.
633 config CPU_BIG_ENDIAN
634 bool "Build big-endian kernel"
635 depends on ARCH_SUPPORTS_BIG_ENDIAN
637 Say Y if you plan on running a kernel in big-endian mode.
638 Note that your board must be properly built and your board
639 port must properly enable any big-endian related features
640 of your chipset/board/processor.
642 config CPU_ENDIAN_BE8
644 depends on CPU_BIG_ENDIAN
645 default CPU_V6 || CPU_V7
647 Support for the BE-8 (big-endian) mode on ARMv6 and ARMv7 processors.
649 config CPU_ENDIAN_BE32
651 depends on CPU_BIG_ENDIAN
652 default !CPU_ENDIAN_BE8
654 Support for the BE-32 (big-endian) mode on pre-ARMv6 processors.
656 config CPU_HIGH_VECTOR
657 depends on !MMU && CPU_CP15 && !CPU_ARM740T
658 bool "Select the High exception vector"
660 Say Y here to select high exception vector(0xFFFF0000~).
661 The exception vector can be vary depending on the platform
662 design in nommu mode. If your platform needs to select
663 high exception vector, say Y.
664 Otherwise or if you are unsure, say N, and the low exception
665 vector (0x00000000~) will be used.
667 config CPU_ICACHE_DISABLE
668 bool "Disable I-Cache (I-bit)"
669 depends on CPU_CP15 && !(CPU_ARM610 || CPU_ARM710 || CPU_ARM720T || CPU_ARM740T || CPU_XSCALE || CPU_XSC3)
671 Say Y here to disable the processor instruction cache. Unless
672 you have a reason not to or are unsure, say N.
674 config CPU_DCACHE_DISABLE
675 bool "Disable D-Cache (C-bit)"
678 Say Y here to disable the processor data cache. Unless
679 you have a reason not to or are unsure, say N.
681 config CPU_DCACHE_SIZE
683 depends on CPU_ARM740T || CPU_ARM946E
684 default 0x00001000 if CPU_ARM740T
685 default 0x00002000 # default size for ARM946E-S
687 Some cores are synthesizable to have various sized cache. For
688 ARM946E-S case, it can vary from 0KB to 1MB.
689 To support such cache operations, it is efficient to know the size
691 If your SoC is configured to have a different size, define the value
692 here with proper conditions.
694 config CPU_DCACHE_WRITETHROUGH
695 bool "Force write through D-cache"
696 depends on (CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_FA526) && !CPU_DCACHE_DISABLE
697 default y if CPU_ARM925T
699 Say Y here to use the data cache in writethrough mode. Unless you
700 specifically require this or are unsure, say N.
702 config CPU_CACHE_ROUND_ROBIN
703 bool "Round robin I and D cache replacement algorithm"
704 depends on (CPU_ARM926T || CPU_ARM946E || CPU_ARM1020) && (!CPU_ICACHE_DISABLE || !CPU_DCACHE_DISABLE)
706 Say Y here to use the predictable round-robin cache replacement
707 policy. Unless you specifically require this or are unsure, say N.
709 config CPU_BPREDICT_DISABLE
710 bool "Disable branch prediction"
711 depends on CPU_ARM1020 || CPU_V6 || CPU_MOHAWK || CPU_XSC3 || CPU_V7 || CPU_FA526
713 Say Y here to disable branch prediction. If unsure, say N.
718 An SMP system using a pre-ARMv6 processor (there are apparently
719 a few prototypes like that in existence) and therefore access to
720 that required register must be emulated.
724 depends on !TLS_REG_EMUL
725 default y if SMP || CPU_32v7
727 This selects support for the CP15 thread register.
728 It is defined to be available on some ARMv6 processors (including
729 all SMP capable ARMv6's) or later processors. User space may
730 assume directly accessing that register and always obtain the
731 expected value only on ARMv7 and above.
733 config NEEDS_SYSCALL_FOR_CMPXCHG
736 SMP on a pre-ARMv6 processor? Well OK then.
737 Forget about fast user space cmpxchg support.
738 It is just not possible.
743 config CACHE_FEROCEON_L2
744 bool "Enable the Feroceon L2 cache controller"
745 depends on ARCH_KIRKWOOD || ARCH_MV78XX0
749 This option enables the Feroceon L2 cache controller.
751 config CACHE_FEROCEON_L2_WRITETHROUGH
752 bool "Force Feroceon L2 cache write through"
753 depends on CACHE_FEROCEON_L2
755 Say Y here to use the Feroceon L2 cache in writethrough mode.
756 Unless you specifically require this, say N for writeback mode.
759 bool "Enable the L2x0 outer cache controller"
760 depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || MACH_REALVIEW_PB1176 || \
761 REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX || ARCH_NOMADIK
765 This option enables the L2x0 PrimeCell.
768 bool "Enable the L2 cache on XScale3"
773 This option enables the L2 cache on XScale3.
775 config ARM_L1_CACHE_SHIFT
777 default 6 if ARCH_OMAP3