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