1comment "Processor Type" 2 3config CPU_32 4 bool 5 default y 6 7# Select CPU types depending on the architecture selected. This selects 8# which CPUs we support in the kernel image, and the compiler instruction 9# optimiser behaviour. 10 11# ARM610 12config CPU_ARM610 13 bool "Support ARM610 processor" 14 depends on ARCH_RPC 15 select CPU_32v3 16 select CPU_CACHE_V3 17 select CPU_CACHE_VIVT 18 select CPU_COPY_V3 19 select CPU_TLB_V3 20 help 21 The ARM610 is the successor to the ARM3 processor 22 and was produced by VLSI Technology Inc. 23 24 Say Y if you want support for the ARM610 processor. 25 Otherwise, say N. 26 27# ARM710 28config CPU_ARM710 29 bool "Support ARM710 processor" if !ARCH_CLPS7500 && ARCH_RPC 30 default y if ARCH_CLPS7500 31 select CPU_32v3 32 select CPU_CACHE_V3 33 select CPU_CACHE_VIVT 34 select CPU_COPY_V3 35 select CPU_TLB_V3 36 help 37 A 32-bit RISC microprocessor based on the ARM7 processor core 38 designed by Advanced RISC Machines Ltd. The ARM710 is the 39 successor to the ARM610 processor. It was released in 40 July 1994 by VLSI Technology Inc. 41 42 Say Y if you want support for the ARM710 processor. 43 Otherwise, say N. 44 45# ARM720T 46config CPU_ARM720T 47 bool "Support ARM720T processor" if !ARCH_CLPS711X && !ARCH_L7200 && !ARCH_CDB89712 && ARCH_INTEGRATOR 48 default y if ARCH_CLPS711X || ARCH_L7200 || ARCH_CDB89712 || ARCH_H720X 49 select CPU_32v4 50 select CPU_ABRT_LV4T 51 select CPU_CACHE_V4 52 select CPU_CACHE_VIVT 53 select CPU_COPY_V4WT 54 select CPU_TLB_V4WT 55 help 56 A 32-bit RISC processor with 8kByte Cache, Write Buffer and 57 MMU built around an ARM7TDMI core. 58 59 Say Y if you want support for the ARM720T processor. 60 Otherwise, say N. 61 62# ARM920T 63config CPU_ARM920T 64 bool "Support ARM920T processor" if !ARCH_S3C2410 65 depends on ARCH_EP93XX || ARCH_INTEGRATOR || ARCH_S3C2410 || ARCH_IMX || ARCH_AAEC2000 || ARCH_AT91RM9200 66 default y if ARCH_S3C2410 || ARCH_AT91RM9200 67 select CPU_32v4 68 select CPU_ABRT_EV4T 69 select CPU_CACHE_V4WT 70 select CPU_CACHE_VIVT 71 select CPU_COPY_V4WB 72 select CPU_TLB_V4WBI 73 help 74 The ARM920T is licensed to be produced by numerous vendors, 75 and is used in the Maverick EP9312 and the Samsung S3C2410. 76 77 More information on the Maverick EP9312 at 78 <http://linuxdevices.com/products/PD2382866068.html>. 79 80 Say Y if you want support for the ARM920T processor. 81 Otherwise, say N. 82 83# ARM922T 84config CPU_ARM922T 85 bool "Support ARM922T processor" if ARCH_INTEGRATOR 86 depends on ARCH_LH7A40X || ARCH_INTEGRATOR 87 default y if ARCH_LH7A40X 88 select CPU_32v4 89 select CPU_ABRT_EV4T 90 select CPU_CACHE_V4WT 91 select CPU_CACHE_VIVT 92 select CPU_COPY_V4WB 93 select CPU_TLB_V4WBI 94 help 95 The ARM922T is a version of the ARM920T, but with smaller 96 instruction and data caches. It is used in Altera's 97 Excalibur XA device family. 98 99 Say Y if you want support for the ARM922T processor. 100 Otherwise, say N. 101 102# ARM925T 103config CPU_ARM925T 104 bool "Support ARM925T processor" if ARCH_OMAP1 105 depends on ARCH_OMAP15XX 106 default y if ARCH_OMAP15XX 107 select CPU_32v4 108 select CPU_ABRT_EV4T 109 select CPU_CACHE_V4WT 110 select CPU_CACHE_VIVT 111 select CPU_COPY_V4WB 112 select CPU_TLB_V4WBI 113 help 114 The ARM925T is a mix between the ARM920T and ARM926T, but with 115 different instruction and data caches. It is used in TI's OMAP 116 device family. 117 118 Say Y if you want support for the ARM925T processor. 119 Otherwise, say N. 120 121# ARM926T 122config CPU_ARM926T 123 bool "Support ARM926T processor" 124 depends on ARCH_INTEGRATOR || ARCH_VERSATILE_PB || MACH_VERSATILE_AB || ARCH_OMAP730 || ARCH_OMAP16XX || MACH_REALVIEW_EB || ARCH_PNX4008 || ARCH_NETX 125 default y if ARCH_VERSATILE_PB || MACH_VERSATILE_AB || ARCH_OMAP730 || ARCH_OMAP16XX || ARCH_PNX4008 || ARCH_NETX 126 select CPU_32v5 127 select CPU_ABRT_EV5TJ 128 select CPU_CACHE_VIVT 129 select CPU_COPY_V4WB 130 select CPU_TLB_V4WBI 131 help 132 This is a variant of the ARM920. It has slightly different 133 instruction sequences for cache and TLB operations. Curiously, 134 there is no documentation on it at the ARM corporate website. 135 136 Say Y if you want support for the ARM926T processor. 137 Otherwise, say N. 138 139# ARM1020 - needs validating 140config CPU_ARM1020 141 bool "Support ARM1020T (rev 0) processor" 142 depends on ARCH_INTEGRATOR 143 select CPU_32v5 144 select CPU_ABRT_EV4T 145 select CPU_CACHE_V4WT 146 select CPU_CACHE_VIVT 147 select CPU_COPY_V4WB 148 select CPU_TLB_V4WBI 149 help 150 The ARM1020 is the 32K cached version of the ARM10 processor, 151 with an addition of a floating-point unit. 152 153 Say Y if you want support for the ARM1020 processor. 154 Otherwise, say N. 155 156# ARM1020E - needs validating 157config CPU_ARM1020E 158 bool "Support ARM1020E processor" 159 depends on ARCH_INTEGRATOR 160 select CPU_32v5 161 select CPU_ABRT_EV4T 162 select CPU_CACHE_V4WT 163 select CPU_CACHE_VIVT 164 select CPU_COPY_V4WB 165 select CPU_TLB_V4WBI 166 depends on n 167 168# ARM1022E 169config CPU_ARM1022 170 bool "Support ARM1022E processor" 171 depends on ARCH_INTEGRATOR 172 select CPU_32v5 173 select CPU_ABRT_EV4T 174 select CPU_CACHE_VIVT 175 select CPU_COPY_V4WB # can probably do better 176 select CPU_TLB_V4WBI 177 help 178 The ARM1022E is an implementation of the ARMv5TE architecture 179 based upon the ARM10 integer core with a 16KiB L1 Harvard cache, 180 embedded trace macrocell, and a floating-point unit. 181 182 Say Y if you want support for the ARM1022E processor. 183 Otherwise, say N. 184 185# ARM1026EJ-S 186config CPU_ARM1026 187 bool "Support ARM1026EJ-S processor" 188 depends on ARCH_INTEGRATOR 189 select CPU_32v5 190 select CPU_ABRT_EV5T # But need Jazelle, but EV5TJ ignores bit 10 191 select CPU_CACHE_VIVT 192 select CPU_COPY_V4WB # can probably do better 193 select CPU_TLB_V4WBI 194 help 195 The ARM1026EJ-S is an implementation of the ARMv5TEJ architecture 196 based upon the ARM10 integer core. 197 198 Say Y if you want support for the ARM1026EJ-S processor. 199 Otherwise, say N. 200 201# SA110 202config CPU_SA110 203 bool "Support StrongARM(R) SA-110 processor" if !ARCH_EBSA110 && !FOOTBRIDGE && !ARCH_TBOX && !ARCH_SHARK && !ARCH_NEXUSPCI && ARCH_RPC 204 default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_TBOX || ARCH_SHARK || ARCH_NEXUSPCI 205 select CPU_32v3 if ARCH_RPC 206 select CPU_32v4 if !ARCH_RPC 207 select CPU_ABRT_EV4 208 select CPU_CACHE_V4WB 209 select CPU_CACHE_VIVT 210 select CPU_COPY_V4WB 211 select CPU_TLB_V4WB 212 help 213 The Intel StrongARM(R) SA-110 is a 32-bit microprocessor and 214 is available at five speeds ranging from 100 MHz to 233 MHz. 215 More information is available at 216 <http://developer.intel.com/design/strong/sa110.htm>. 217 218 Say Y if you want support for the SA-110 processor. 219 Otherwise, say N. 220 221# SA1100 222config CPU_SA1100 223 bool 224 depends on ARCH_SA1100 225 default y 226 select CPU_32v4 227 select CPU_ABRT_EV4 228 select CPU_CACHE_V4WB 229 select CPU_CACHE_VIVT 230 select CPU_TLB_V4WB 231 232# XScale 233config CPU_XSCALE 234 bool 235 depends on ARCH_IOP3XX || ARCH_PXA || ARCH_IXP4XX || ARCH_IXP2000 236 default y 237 select CPU_32v5 238 select CPU_ABRT_EV5T 239 select CPU_CACHE_VIVT 240 select CPU_TLB_V4WBI 241 242# XScale Core Version 3 243config CPU_XSC3 244 bool 245 depends on ARCH_IXP23XX 246 default y 247 select CPU_32v5 248 select CPU_ABRT_EV5T 249 select CPU_CACHE_VIVT 250 select CPU_TLB_V4WBI 251 select IO_36 252 253# ARMv6 254config CPU_V6 255 bool "Support ARM V6 processor" 256 depends on ARCH_INTEGRATOR || MACH_REALVIEW_EB || ARCH_OMAP2 257 select CPU_32v6 258 select CPU_ABRT_EV6 259 select CPU_CACHE_V6 260 select CPU_CACHE_VIPT 261 select CPU_COPY_V6 262 select CPU_TLB_V6 263 264# ARMv6k 265config CPU_32v6K 266 bool "Support ARM V6K processor extensions" if !SMP 267 depends on CPU_V6 268 default y if SMP 269 help 270 Say Y here if your ARMv6 processor supports the 'K' extension. 271 This enables the kernel to use some instructions not present 272 on previous processors, and as such a kernel build with this 273 enabled will not boot on processors with do not support these 274 instructions. 275 276# Figure out what processor architecture version we should be using. 277# This defines the compiler instruction set which depends on the machine type. 278config CPU_32v3 279 bool 280 select TLS_REG_EMUL if SMP 281 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP 282 283config CPU_32v4 284 bool 285 select TLS_REG_EMUL if SMP 286 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP 287 288config CPU_32v5 289 bool 290 select TLS_REG_EMUL if SMP 291 select NEEDS_SYSCALL_FOR_CMPXCHG if SMP 292 293config CPU_32v6 294 bool 295 296# The abort model 297config CPU_ABRT_EV4 298 bool 299 300config CPU_ABRT_EV4T 301 bool 302 303config CPU_ABRT_LV4T 304 bool 305 306config CPU_ABRT_EV5T 307 bool 308 309config CPU_ABRT_EV5TJ 310 bool 311 312config CPU_ABRT_EV6 313 bool 314 315# The cache model 316config CPU_CACHE_V3 317 bool 318 319config CPU_CACHE_V4 320 bool 321 322config CPU_CACHE_V4WT 323 bool 324 325config CPU_CACHE_V4WB 326 bool 327 328config CPU_CACHE_V6 329 bool 330 331config CPU_CACHE_VIVT 332 bool 333 334config CPU_CACHE_VIPT 335 bool 336 337# The copy-page model 338config CPU_COPY_V3 339 bool 340 341config CPU_COPY_V4WT 342 bool 343 344config CPU_COPY_V4WB 345 bool 346 347config CPU_COPY_V6 348 bool 349 350# This selects the TLB model 351config CPU_TLB_V3 352 bool 353 help 354 ARM Architecture Version 3 TLB. 355 356config CPU_TLB_V4WT 357 bool 358 help 359 ARM Architecture Version 4 TLB with writethrough cache. 360 361config CPU_TLB_V4WB 362 bool 363 help 364 ARM Architecture Version 4 TLB with writeback cache. 365 366config CPU_TLB_V4WBI 367 bool 368 help 369 ARM Architecture Version 4 TLB with writeback cache and invalidate 370 instruction cache entry. 371 372config CPU_TLB_V6 373 bool 374 375# 376# CPU supports 36-bit I/O 377# 378config IO_36 379 bool 380 381comment "Processor Features" 382 383config ARM_THUMB 384 bool "Support Thumb user binaries" 385 depends on CPU_ARM720T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_XSC3 || CPU_V6 386 default y 387 help 388 Say Y if you want to include kernel support for running user space 389 Thumb binaries. 390 391 The Thumb instruction set is a compressed form of the standard ARM 392 instruction set resulting in smaller binaries at the expense of 393 slightly less efficient code. 394 395 If you don't know what this all is, saying Y is a safe choice. 396 397config CPU_BIG_ENDIAN 398 bool "Build big-endian kernel" 399 depends on ARCH_SUPPORTS_BIG_ENDIAN 400 help 401 Say Y if you plan on running a kernel in big-endian mode. 402 Note that your board must be properly built and your board 403 port must properly enable any big-endian related features 404 of your chipset/board/processor. 405 406config CPU_ICACHE_DISABLE 407 bool "Disable I-Cache" 408 depends on CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_V6 409 help 410 Say Y here to disable the processor instruction cache. Unless 411 you have a reason not to or are unsure, say N. 412 413config CPU_DCACHE_DISABLE 414 bool "Disable D-Cache" 415 depends on CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_V6 416 help 417 Say Y here to disable the processor data cache. Unless 418 you have a reason not to or are unsure, say N. 419 420config CPU_DCACHE_WRITETHROUGH 421 bool "Force write through D-cache" 422 depends on (CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_V6) && !CPU_DCACHE_DISABLE 423 default y if CPU_ARM925T 424 help 425 Say Y here to use the data cache in writethrough mode. Unless you 426 specifically require this or are unsure, say N. 427 428config CPU_CACHE_ROUND_ROBIN 429 bool "Round robin I and D cache replacement algorithm" 430 depends on (CPU_ARM926T || CPU_ARM1020) && (!CPU_ICACHE_DISABLE || !CPU_DCACHE_DISABLE) 431 help 432 Say Y here to use the predictable round-robin cache replacement 433 policy. Unless you specifically require this or are unsure, say N. 434 435config CPU_BPREDICT_DISABLE 436 bool "Disable branch prediction" 437 depends on CPU_ARM1020 || CPU_V6 438 help 439 Say Y here to disable branch prediction. If unsure, say N. 440 441config TLS_REG_EMUL 442 bool 443 help 444 An SMP system using a pre-ARMv6 processor (there are apparently 445 a few prototypes like that in existence) and therefore access to 446 that required register must be emulated. 447 448config HAS_TLS_REG 449 bool 450 depends on !TLS_REG_EMUL 451 default y if SMP || CPU_32v7 452 help 453 This selects support for the CP15 thread register. 454 It is defined to be available on some ARMv6 processors (including 455 all SMP capable ARMv6's) or later processors. User space may 456 assume directly accessing that register and always obtain the 457 expected value only on ARMv7 and above. 458 459config NEEDS_SYSCALL_FOR_CMPXCHG 460 bool 461 help 462 SMP on a pre-ARMv6 processor? Well OK then. 463 Forget about fast user space cmpxchg support. 464 It is just not possible. 465 466