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"
19 select CPU_COPY_V3 if MMU
20 select CPU_TLB_V3 if MMU
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"
36 A 32-bit RISC microprocessor based on the ARM7 processor core
37 which has no memory control unit and cache.
39 Say Y if you want support for the ARM7TDMI processor.
44 bool "Support ARM710 processor" if !ARCH_CLPS7500 && ARCH_RPC
45 default y if ARCH_CLPS7500
50 select CPU_COPY_V3 if MMU
51 select CPU_TLB_V3 if MMU
53 A 32-bit RISC microprocessor based on the ARM7 processor core
54 designed by Advanced RISC Machines Ltd. The ARM710 is the
55 successor to the ARM610 processor. It was released in
56 July 1994 by VLSI Technology Inc.
58 Say Y if you want support for the ARM710 processor.
63 bool "Support LPC22xx/ARM7TDMI processor" if !ARCH_LPC22xx
64 depends on ARCH_LPC22xx
65 default y if ARCH_LPC22xx
68 A Philips 32-bit RISC microprocessor based on ARM7TDMI-S core.
72 bool "Support ARM720T processor" if !ARCH_CLPS711X && !ARCH_L7200 && !ARCH_CDB89712 && ARCH_INTEGRATOR
73 default y if ARCH_CLPS711X || ARCH_L7200 || ARCH_CDB89712 || ARCH_H720X
79 select CPU_COPY_V4WT if MMU
80 select CPU_TLB_V4WT if MMU
82 A 32-bit RISC processor with 8kByte Cache, Write Buffer and
83 MMU built around an ARM7TDMI core.
85 Say Y if you want support for the ARM720T processor.
90 bool "Support ARM740T processor" if ARCH_INTEGRATOR
94 select CPU_CACHE_V3 # although the core is v4t
97 A 32-bit RISC processor with 8KB cache or 4KB variants,
98 write buffer and MPU(Protection Unit) built around
101 Say Y if you want support for the ARM740T processor.
106 bool "Support ARM9TDMI processor"
109 select CPU_ABRT_NOMMU
112 A 32-bit RISC microprocessor based on the ARM9 processor core
113 which has no memory control unit and cache.
115 Say Y if you want support for the ARM9TDMI processor.
120 bool "Support ARM920T processor"
121 depends on ARCH_EP93XX || ARCH_INTEGRATOR || CPU_S3C2410 || CPU_S3C2440 || CPU_S3C2442 || ARCH_IMX || ARCH_AAEC2000 || ARCH_AT91RM9200
122 default y if CPU_S3C2410 || CPU_S3C2440 || CPU_S3C2442 || ARCH_AT91RM9200
125 select CPU_CACHE_V4WT
126 select CPU_CACHE_VIVT
128 select CPU_COPY_V4WB if MMU
129 select CPU_TLB_V4WBI if MMU
131 The ARM920T is licensed to be produced by numerous vendors,
132 and is used in the Maverick EP9312 and the Samsung S3C2410.
134 More information on the Maverick EP9312 at
135 <http://linuxdevices.com/products/PD2382866068.html>.
137 Say Y if you want support for the ARM920T processor.
142 bool "Support ARM922T processor" if ARCH_INTEGRATOR
143 depends on ARCH_LH7A40X || ARCH_INTEGRATOR || ARCH_KS8695 || ARCH_MOXART
144 default y if ARCH_LH7A40X || ARCH_KS8695 || ARCH_MOXART
147 select CPU_CACHE_VIVT
149 select CPU_COPY_V4WB if MMU
151 The ARM922T is a version of the ARM920T, but with smaller
152 instruction and data caches. It is used in Altera's
153 Excalibur XA device family.
155 Say Y if you want support for the ARM922T processor.
160 bool "Support ARM925T processor" if ARCH_OMAP1
161 depends on ARCH_OMAP15XX
162 default y if ARCH_OMAP15XX
165 select CPU_CACHE_V4WT
166 select CPU_CACHE_VIVT
168 select CPU_COPY_V4WB if MMU
169 select CPU_TLB_V4WBI if MMU
171 The ARM925T is a mix between the ARM920T and ARM926T, but with
172 different instruction and data caches. It is used in TI's OMAP
175 Say Y if you want support for the ARM925T processor.
180 bool "Support ARM926T processor"
181 depends on ARCH_INTEGRATOR || ARCH_VERSATILE_PB || MACH_VERSATILE_AB || ARCH_OMAP730 || ARCH_OMAP16XX || MACH_REALVIEW_EB || ARCH_PNX4008 || ARCH_NETX || CPU_S3C2412 || ARCH_AT91SAM9260 || ARCH_AT91SAM9261
182 default y if ARCH_VERSATILE_PB || MACH_VERSATILE_AB || ARCH_OMAP730 || ARCH_OMAP16XX || ARCH_PNX4008 || ARCH_NETX || CPU_S3C2412 || ARCH_AT91SAM9260 || ARCH_AT91SAM9261
184 select CPU_ABRT_EV5TJ
185 select CPU_CACHE_VIVT
187 select CPU_COPY_V4WB if MMU
188 select CPU_TLB_V4WBI if MMU
190 This is a variant of the ARM920. It has slightly different
191 instruction sequences for cache and TLB operations. Curiously,
192 there is no documentation on it at the ARM corporate website.
194 Say Y if you want support for the ARM926T processor.
199 bool "Support ARM940T processor" if ARCH_INTEGRATOR
202 select CPU_ABRT_NOMMU
203 select CPU_CACHE_VIVT
206 ARM940T is a member of the ARM9TDMI family of general-
207 purpose microprocessors with MPU and seperate 4KB
208 instruction and 4KB data cases, each with a 4-word line
211 Say Y if you want support for the ARM940T processor.
216 bool "Support ARM946E-S processor" if ARCH_INTEGRATOR
219 select CPU_ABRT_NOMMU
220 select CPU_CACHE_VIVT
223 ARM946E-S is a member of the ARM9E-S family of high-
224 performance, 32-bit system-on-chip processor solutions.
225 The TCM and ARMv5TE 32-bit instruction set is supported.
227 Say Y if you want support for the ARM946E-S processor.
230 # ARM1020 - needs validating
232 bool "Support ARM1020T (rev 0) processor"
233 depends on ARCH_INTEGRATOR
236 select CPU_CACHE_V4WT
237 select CPU_CACHE_VIVT
239 select CPU_COPY_V4WB if MMU
240 select CPU_TLB_V4WBI if MMU
242 The ARM1020 is the 32K cached version of the ARM10 processor,
243 with an addition of a floating-point unit.
245 Say Y if you want support for the ARM1020 processor.
248 # ARM1020E - needs validating
250 bool "Support ARM1020E processor"
251 depends on ARCH_INTEGRATOR
254 select CPU_CACHE_V4WT
255 select CPU_CACHE_VIVT
257 select CPU_COPY_V4WB if MMU
258 select CPU_TLB_V4WBI if MMU
263 bool "Support ARM1022E processor"
264 depends on ARCH_INTEGRATOR
267 select CPU_CACHE_VIVT
269 select CPU_COPY_V4WB if MMU # can probably do better
270 select CPU_TLB_V4WBI if MMU
272 The ARM1022E is an implementation of the ARMv5TE architecture
273 based upon the ARM10 integer core with a 16KiB L1 Harvard cache,
274 embedded trace macrocell, and a floating-point unit.
276 Say Y if you want support for the ARM1022E processor.
281 bool "Support ARM1026EJ-S processor"
282 depends on ARCH_INTEGRATOR
284 select CPU_ABRT_EV5T # But need Jazelle, but EV5TJ ignores bit 10
285 select CPU_CACHE_VIVT
287 select CPU_COPY_V4WB if MMU # can probably do better
288 select CPU_TLB_V4WBI if MMU
290 The ARM1026EJ-S is an implementation of the ARMv5TEJ architecture
291 based upon the ARM10 integer core.
293 Say Y if you want support for the ARM1026EJ-S processor.
298 bool "Support StrongARM(R) SA-110 processor" if !ARCH_EBSA110 && !FOOTBRIDGE && !ARCH_TBOX && !ARCH_SHARK && !ARCH_NEXUSPCI && ARCH_RPC
299 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_TBOX || ARCH_SHARK || ARCH_NEXUSPCI
300 select CPU_32v3 if ARCH_RPC
301 select CPU_32v4 if !ARCH_RPC
303 select CPU_CACHE_V4WB
304 select CPU_CACHE_VIVT
306 select CPU_COPY_V4WB if MMU
307 select CPU_TLB_V4WB if MMU
309 The Intel StrongARM(R) SA-110 is a 32-bit microprocessor and
310 is available at five speeds ranging from 100 MHz to 233 MHz.
311 More information is available at
312 <http://developer.intel.com/design/strong/sa110.htm>.
314 Say Y if you want support for the SA-110 processor.
320 depends on ARCH_SA1100
324 select CPU_CACHE_V4WB
325 select CPU_CACHE_VIVT
327 select CPU_TLB_V4WB if MMU
332 depends on ARCH_IOP32X || ARCH_IOP33X || ARCH_PXA || ARCH_IXP4XX || ARCH_IXP2000
336 select CPU_CACHE_VIVT
338 select CPU_TLB_V4WBI if MMU
340 # XScale Core Version 3
343 depends on ARCH_IXP23XX
347 select CPU_CACHE_VIVT
349 select CPU_TLB_V4WBI if MMU
354 bool "Support ARM V6 processor"
355 depends on ARCH_INTEGRATOR || MACH_REALVIEW_EB || ARCH_OMAP2
359 select CPU_CACHE_VIPT
361 select CPU_COPY_V6 if MMU
362 select CPU_TLB_V6 if MMU
366 bool "Support ARM V6K processor extensions" if !SMP
370 Say Y here if your ARMv6 processor supports the 'K' extension.
371 This enables the kernel to use some instructions not present
372 on previous processors, and as such a kernel build with this
373 enabled will not boot on processors with do not support these
376 # Figure out what processor architecture version we should be using.
377 # This defines the compiler instruction set which depends on the machine type.
380 select TLS_REG_EMUL if SMP || !MMU
381 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
385 select TLS_REG_EMUL if SMP || !MMU
386 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
390 select TLS_REG_EMUL if SMP || !MMU
391 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
395 select TLS_REG_EMUL if SMP || !MMU
396 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP
402 config CPU_ABRT_NOMMU
417 config CPU_ABRT_EV5TJ
430 config CPU_CACHE_V4WT
433 config CPU_CACHE_V4WB
439 config CPU_CACHE_VIVT
442 config CPU_CACHE_VIPT
446 # The copy-page model
459 # This selects the TLB model
463 ARM Architecture Version 3 TLB.
468 ARM Architecture Version 4 TLB with writethrough cache.
473 ARM Architecture Version 4 TLB with writeback cache.
478 ARM Architecture Version 4 TLB with writeback cache and invalidate
479 instruction cache entry.
489 Processor has the CP15 register.
495 Processor has the CP15 register, which has MMU related registers.
501 Processor has the CP15 register, which has MPU related registers.
504 # CPU supports 36-bit I/O
509 comment "Processor Features"
512 bool "Support Thumb user binaries"
513 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
516 Say Y if you want to include kernel support for running user space
519 The Thumb instruction set is a compressed form of the standard ARM
520 instruction set resulting in smaller binaries at the expense of
521 slightly less efficient code.
523 If you don't know what this all is, saying Y is a safe choice.
525 config CPU_BIG_ENDIAN
526 bool "Build big-endian kernel"
527 depends on ARCH_SUPPORTS_BIG_ENDIAN
528 default y if ARCH_S3C3410
530 Say Y if you plan on running a kernel in big-endian mode.
531 Note that your board must be properly built and your board
532 port must properly enable any big-endian related features
533 of your chipset/board/processor.
535 config CPU_MXU_ENABLE
537 bool "Enable the MMU/MPU on non-paged memory management mode"
538 depends on CPU_ARM720T ||CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020
540 Say Y here to enable the memory control unit like: MMU/MPU,
541 on non-paged memory management mode.
543 config CPU_HIGH_VECTOR
544 depends !MMU && CPU_CP15 && !CPU_ARM740T
545 bool "Select the High exception vector"
548 Say Y here to select high exception vector(0xFFFF0000~).
549 The exception vector can be vary depending on the platform
550 design in nommu mode. If your platform needs to select
551 high exception vector, say Y.
552 Otherwise or if you are unsure, say N, and the low exception
553 vector (0x00000000~) will be used.
555 config CPU_ICACHE_DISABLE
556 bool "Disable I-Cache (I-bit)"
557 depends on CPU_CP15 && !(CPU_ARM610 || CPU_ARM710 || CPU_ARM720T || CPU_ARM740T || CPU_XSCALE || CPU_XSC3)
559 Say Y here to disable the processor instruction cache. Unless
560 you have a reason not to or are unsure, say N.
562 config CPU_DCACHE_DISABLE
563 bool "Disable D-Cache (C-bit)"
566 Say Y here to disable the processor data cache. Unless
567 you have a reason not to or are unsure, say N.
569 config CPU_DCACHE_SIZE
571 depends on CPU_ARM740T || CPU_ARM946E
572 default 0x00001000 if CPU_ARM740T
573 default 0x00002000 # default size for ARM946E-S
575 Some cores are synthesizable to have various sized cache. For
576 ARM946E-S case, it can vary from 0KB to 1MB.
577 To support such cache operations, it is efficient to know the size
579 If your SoC is configured to have a different size, define the value
580 here with proper conditions.
582 config CPU_DCACHE_WRITETHROUGH
583 bool "Force write through D-cache"
584 depends on (CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || CPU_ARM1020 || CPU_V6) && !CPU_DCACHE_DISABLE
585 default y if CPU_ARM925T
587 Say Y here to use the data cache in writethrough mode. Unless you
588 specifically require this or are unsure, say N.
590 config CPU_CACHE_ROUND_ROBIN
591 bool "Round robin I and D cache replacement algorithm"
592 depends on (CPU_ARM926T || CPU_ARM946E || CPU_ARM1020) && (!CPU_ICACHE_DISABLE || !CPU_DCACHE_DISABLE)
594 Say Y here to use the predictable round-robin cache replacement
595 policy. Unless you specifically require this or are unsure, say N.
597 config CPU_BPREDICT_DISABLE
598 bool "Disable branch prediction"
599 depends on CPU_ARM1020 || CPU_V6
601 Say Y here to disable branch prediction. If unsure, say N.
606 An SMP system using a pre-ARMv6 processor (there are apparently
607 a few prototypes like that in existence) and therefore access to
608 that required register must be emulated.
612 depends on !TLS_REG_EMUL
613 default y if SMP || CPU_32v7
615 This selects support for the CP15 thread register.
616 It is defined to be available on some ARMv6 processors (including
617 all SMP capable ARMv6's) or later processors. User space may
618 assume directly accessing that register and always obtain the
619 expected value only on ARMv7 and above.
621 config NEEDS_SYSCALL_FOR_CMPXCHG
624 SMP on a pre-ARMv6 processor? Well OK then.
625 Forget about fast user space cmpxchg support.
626 It is just not possible.