1comment "Processor Type" 2 3choice 4 prompt "CPU family support" 5 default M68KCLASSIC if MMU 6 default COLDFIRE if !MMU 7 help 8 The Freescale (was Motorola) M68K family of processors implements 9 the full 68000 processor instruction set. 10 The Freescale ColdFire family of processors is a modern derivative 11 of the 68000 processor family. They are mainly targeted at embedded 12 applications, and are all System-On-Chip (SOC) devices, as opposed 13 to stand alone CPUs. They implement a subset of the original 68000 14 processor instruction set. 15 If you anticipate running this kernel on a computer with a classic 16 MC68xxx processor, select M68KCLASSIC. 17 If you anticipate running this kernel on a computer with a ColdFire 18 processor, select COLDFIRE. 19 20config M68KCLASSIC 21 bool "Classic M68K CPU family support" 22 23config COLDFIRE 24 bool "Coldfire CPU family support" 25 select ARCH_HAVE_CUSTOM_GPIO_H 26 select CPU_HAS_NO_BITFIELDS 27 select CPU_HAS_NO_MULDIV64 28 select GENERIC_CSUM 29 select GPIOLIB 30 select HAVE_CLK 31 32endchoice 33 34if M68KCLASSIC 35 36config M68000 37 bool "MC68000" 38 depends on !MMU 39 select CPU_HAS_NO_BITFIELDS 40 select CPU_HAS_NO_MULDIV64 41 select CPU_HAS_NO_UNALIGNED 42 select GENERIC_CSUM 43 select CPU_NO_EFFICIENT_FFS 44 help 45 The Freescale (was Motorola) 68000 CPU is the first generation of 46 the well known M68K family of processors. The CPU core as well as 47 being available as a stand alone CPU was also used in many 48 System-On-Chip devices (eg 68328, 68302, etc). It does not contain 49 a paging MMU. 50 51config MCPU32 52 bool 53 select CPU_HAS_NO_BITFIELDS 54 select CPU_HAS_NO_UNALIGNED 55 select CPU_NO_EFFICIENT_FFS 56 help 57 The Freescale (was then Motorola) CPU32 is a CPU core that is 58 based on the 68020 processor. For the most part it is used in 59 System-On-Chip parts, and does not contain a paging MMU. 60 61config M68020 62 bool "68020 support" 63 depends on MMU 64 select CPU_HAS_ADDRESS_SPACES 65 help 66 If you anticipate running this kernel on a computer with a MC68020 67 processor, say Y. Otherwise, say N. Note that the 68020 requires a 68 68851 MMU (Memory Management Unit) to run Linux/m68k, except on the 69 Sun 3, which provides its own version. 70 71config M68030 72 bool "68030 support" 73 depends on MMU && !MMU_SUN3 74 select CPU_HAS_ADDRESS_SPACES 75 help 76 If you anticipate running this kernel on a computer with a MC68030 77 processor, say Y. Otherwise, say N. Note that a MC68EC030 will not 78 work, as it does not include an MMU (Memory Management Unit). 79 80config M68040 81 bool "68040 support" 82 depends on MMU && !MMU_SUN3 83 select CPU_HAS_ADDRESS_SPACES 84 help 85 If you anticipate running this kernel on a computer with a MC68LC040 86 or MC68040 processor, say Y. Otherwise, say N. Note that an 87 MC68EC040 will not work, as it does not include an MMU (Memory 88 Management Unit). 89 90config M68060 91 bool "68060 support" 92 depends on MMU && !MMU_SUN3 93 select CPU_HAS_ADDRESS_SPACES 94 help 95 If you anticipate running this kernel on a computer with a MC68060 96 processor, say Y. Otherwise, say N. 97 98config M68328 99 bool "MC68328" 100 depends on !MMU 101 select M68000 102 help 103 Motorola 68328 processor support. 104 105config M68EZ328 106 bool "MC68EZ328" 107 depends on !MMU 108 select M68000 109 help 110 Motorola 68EX328 processor support. 111 112config M68VZ328 113 bool "MC68VZ328" 114 depends on !MMU 115 select M68000 116 help 117 Motorola 68VZ328 processor support. 118 119endif # M68KCLASSIC 120 121if COLDFIRE 122 123choice 124 prompt "ColdFire SoC type" 125 default M520x 126 help 127 Select the type of ColdFire System-on-Chip (SoC) that you want 128 to build for. 129 130config M5206 131 bool "MCF5206" 132 depends on !MMU 133 select COLDFIRE_SW_A7 134 select HAVE_MBAR 135 select CPU_NO_EFFICIENT_FFS 136 help 137 Motorola ColdFire 5206 processor support. 138 139config M5206e 140 bool "MCF5206e" 141 depends on !MMU 142 select COLDFIRE_SW_A7 143 select HAVE_MBAR 144 select CPU_NO_EFFICIENT_FFS 145 help 146 Motorola ColdFire 5206e processor support. 147 148config M520x 149 bool "MCF520x" 150 depends on !MMU 151 select GENERIC_CLOCKEVENTS 152 select HAVE_CACHE_SPLIT 153 help 154 Freescale Coldfire 5207/5208 processor support. 155 156config M523x 157 bool "MCF523x" 158 depends on !MMU 159 select GENERIC_CLOCKEVENTS 160 select HAVE_CACHE_SPLIT 161 select HAVE_IPSBAR 162 help 163 Freescale Coldfire 5230/1/2/4/5 processor support 164 165config M5249 166 bool "MCF5249" 167 depends on !MMU 168 select COLDFIRE_SW_A7 169 select HAVE_MBAR 170 select CPU_NO_EFFICIENT_FFS 171 help 172 Motorola ColdFire 5249 processor support. 173 174config M525x 175 bool "MCF525x" 176 depends on !MMU 177 select COLDFIRE_SW_A7 178 select HAVE_MBAR 179 select CPU_NO_EFFICIENT_FFS 180 help 181 Freescale (Motorola) Coldfire 5251/5253 processor support. 182 183config M5271 184 bool "MCF5271" 185 depends on !MMU 186 select M527x 187 select HAVE_CACHE_SPLIT 188 select HAVE_IPSBAR 189 select GENERIC_CLOCKEVENTS 190 help 191 Freescale (Motorola) ColdFire 5270/5271 processor support. 192 193config M5272 194 bool "MCF5272" 195 depends on !MMU 196 select COLDFIRE_SW_A7 197 select HAVE_MBAR 198 select CPU_NO_EFFICIENT_FFS 199 help 200 Motorola ColdFire 5272 processor support. 201 202config M5275 203 bool "MCF5275" 204 depends on !MMU 205 select M527x 206 select HAVE_CACHE_SPLIT 207 select HAVE_IPSBAR 208 select GENERIC_CLOCKEVENTS 209 help 210 Freescale (Motorola) ColdFire 5274/5275 processor support. 211 212config M528x 213 bool "MCF528x" 214 depends on !MMU 215 select GENERIC_CLOCKEVENTS 216 select HAVE_CACHE_SPLIT 217 select HAVE_IPSBAR 218 help 219 Motorola ColdFire 5280/5282 processor support. 220 221config M5307 222 bool "MCF5307" 223 depends on !MMU 224 select COLDFIRE_SW_A7 225 select HAVE_CACHE_CB 226 select HAVE_MBAR 227 select CPU_NO_EFFICIENT_FFS 228 help 229 Motorola ColdFire 5307 processor support. 230 231config M532x 232 bool "MCF532x" 233 depends on !MMU 234 select M53xx 235 select HAVE_CACHE_CB 236 help 237 Freescale (Motorola) ColdFire 532x processor support. 238 239config M537x 240 bool "MCF537x" 241 depends on !MMU 242 select M53xx 243 select HAVE_CACHE_CB 244 help 245 Freescale ColdFire 537x processor support. 246 247config M5407 248 bool "MCF5407" 249 depends on !MMU 250 select COLDFIRE_SW_A7 251 select HAVE_CACHE_CB 252 select HAVE_MBAR 253 select CPU_NO_EFFICIENT_FFS 254 help 255 Motorola ColdFire 5407 processor support. 256 257config M547x 258 bool "MCF547x" 259 select M54xx 260 select MMU_COLDFIRE if MMU 261 select HAVE_CACHE_CB 262 select HAVE_MBAR 263 select CPU_NO_EFFICIENT_FFS 264 help 265 Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support. 266 267config M548x 268 bool "MCF548x" 269 select MMU_COLDFIRE if MMU 270 select M54xx 271 select HAVE_CACHE_CB 272 select HAVE_MBAR 273 select CPU_NO_EFFICIENT_FFS 274 help 275 Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support. 276 277config M5441x 278 bool "MCF5441x" 279 depends on !MMU 280 select GENERIC_CLOCKEVENTS 281 select HAVE_CACHE_CB 282 help 283 Freescale Coldfire 54410/54415/54416/54417/54418 processor support. 284 285endchoice 286 287config M527x 288 bool 289 290config M53xx 291 bool 292 293config M54xx 294 bool 295 296endif # COLDFIRE 297 298 299comment "Processor Specific Options" 300 301config M68KFPU_EMU 302 bool "Math emulation support" 303 depends on MMU 304 help 305 At some point in the future, this will cause floating-point math 306 instructions to be emulated by the kernel on machines that lack a 307 floating-point math coprocessor. Thrill-seekers and chronically 308 sleep-deprived psychotic hacker types can say Y now, everyone else 309 should probably wait a while. 310 311config M68KFPU_EMU_EXTRAPREC 312 bool "Math emulation extra precision" 313 depends on M68KFPU_EMU 314 help 315 The fpu uses normally a few bit more during calculations for 316 correct rounding, the emulator can (often) do the same but this 317 extra calculation can cost quite some time, so you can disable 318 it here. The emulator will then "only" calculate with a 64 bit 319 mantissa and round slightly incorrect, what is more than enough 320 for normal usage. 321 322config M68KFPU_EMU_ONLY 323 bool "Math emulation only kernel" 324 depends on M68KFPU_EMU 325 help 326 This option prevents any floating-point instructions from being 327 compiled into the kernel, thereby the kernel doesn't save any 328 floating point context anymore during task switches, so this 329 kernel will only be usable on machines without a floating-point 330 math coprocessor. This makes the kernel a bit faster as no tests 331 needs to be executed whether a floating-point instruction in the 332 kernel should be executed or not. 333 334config ADVANCED 335 bool "Advanced configuration options" 336 depends on MMU 337 ---help--- 338 This gives you access to some advanced options for the CPU. The 339 defaults should be fine for most users, but these options may make 340 it possible for you to improve performance somewhat if you know what 341 you are doing. 342 343 Note that the answer to this question won't directly affect the 344 kernel: saying N will just cause the configurator to skip all 345 the questions about these options. 346 347 Most users should say N to this question. 348 349config RMW_INSNS 350 bool "Use read-modify-write instructions" 351 depends on ADVANCED 352 ---help--- 353 This allows to use certain instructions that work with indivisible 354 read-modify-write bus cycles. While this is faster than the 355 workaround of disabling interrupts, it can conflict with DMA 356 ( = direct memory access) on many Amiga systems, and it is also said 357 to destabilize other machines. It is very likely that this will 358 cause serious problems on any Amiga or Atari Medusa if set. The only 359 configuration where it should work are 68030-based Ataris, where it 360 apparently improves performance. But you've been warned! Unless you 361 really know what you are doing, say N. Try Y only if you're quite 362 adventurous. 363 364config SINGLE_MEMORY_CHUNK 365 bool "Use one physical chunk of memory only" if ADVANCED && !SUN3 366 depends on MMU 367 default y if SUN3 368 select NEED_MULTIPLE_NODES 369 help 370 Ignore all but the first contiguous chunk of physical memory for VM 371 purposes. This will save a few bytes kernel size and may speed up 372 some operations. Say N if not sure. 373 374config ARCH_DISCONTIGMEM_ENABLE 375 def_bool MMU && !SINGLE_MEMORY_CHUNK 376 377config 060_WRITETHROUGH 378 bool "Use write-through caching for 68060 supervisor accesses" 379 depends on ADVANCED && M68060 380 ---help--- 381 The 68060 generally uses copyback caching of recently accessed data. 382 Copyback caching means that memory writes will be held in an on-chip 383 cache and only written back to memory some time later. Saying Y 384 here will force supervisor (kernel) accesses to use writethrough 385 caching. Writethrough caching means that data is written to memory 386 straight away, so that cache and memory data always agree. 387 Writethrough caching is less efficient, but is needed for some 388 drivers on 68060 based systems where the 68060 bus snooping signal 389 is hardwired on. The 53c710 SCSI driver is known to suffer from 390 this problem. 391 392config M68K_L2_CACHE 393 bool 394 depends on MAC 395 default y 396 397config NODES_SHIFT 398 int 399 default "3" 400 depends on !SINGLE_MEMORY_CHUNK 401 402config CPU_HAS_NO_BITFIELDS 403 bool 404 405config CPU_HAS_NO_MULDIV64 406 bool 407 408config CPU_HAS_NO_UNALIGNED 409 bool 410 411config CPU_HAS_ADDRESS_SPACES 412 bool 413 414config FPU 415 bool 416 417config COLDFIRE_SW_A7 418 bool 419 420config HAVE_CACHE_SPLIT 421 bool 422 423config HAVE_CACHE_CB 424 bool 425 426config HAVE_MBAR 427 bool 428 429config HAVE_IPSBAR 430 bool 431 432config CLOCK_FREQ 433 int "Set the core clock frequency" 434 default "25000000" if M5206 435 default "54000000" if M5206e 436 default "166666666" if M520x 437 default "140000000" if M5249 438 default "150000000" if M527x || M523x 439 default "90000000" if M5307 440 default "50000000" if M5407 441 default "266000000" if M54xx 442 default "66666666" 443 depends on COLDFIRE 444 help 445 Define the CPU clock frequency in use. This is the core clock 446 frequency, it may or may not be the same as the external clock 447 crystal fitted to your board. Some processors have an internal 448 PLL and can have their frequency programmed at run time, others 449 use internal dividers. In general the kernel won't setup a PLL 450 if it is fitted (there are some exceptions). This value will be 451 specific to the exact CPU that you are using. 452 453config OLDMASK 454 bool "Old mask 5307 (1H55J) silicon" 455 depends on M5307 456 help 457 Build support for the older revision ColdFire 5307 silicon. 458 Specifically this is the 1H55J mask revision. 459 460if HAVE_CACHE_SPLIT 461choice 462 prompt "Split Cache Configuration" 463 default CACHE_I 464 465config CACHE_I 466 bool "Instruction" 467 help 468 Use all of the ColdFire CPU cache memory as an instruction cache. 469 470config CACHE_D 471 bool "Data" 472 help 473 Use all of the ColdFire CPU cache memory as a data cache. 474 475config CACHE_BOTH 476 bool "Both" 477 help 478 Split the ColdFire CPU cache, and use half as an instruction cache 479 and half as a data cache. 480endchoice 481endif 482 483if HAVE_CACHE_CB 484choice 485 prompt "Data cache mode" 486 default CACHE_WRITETHRU 487 488config CACHE_WRITETHRU 489 bool "Write-through" 490 help 491 The ColdFire CPU cache is set into Write-through mode. 492 493config CACHE_COPYBACK 494 bool "Copy-back" 495 help 496 The ColdFire CPU cache is set into Copy-back mode. 497endchoice 498endif 499 500