1# SPDX-License-Identifier: GPL-2.0 2comment "Processor Type" 3 4choice 5 prompt "CPU family support" 6 default M68KCLASSIC if MMU 7 default COLDFIRE if !MMU 8 help 9 The Freescale (was Motorola) M68K family of processors implements 10 the full 68000 processor instruction set. 11 The Freescale ColdFire family of processors is a modern derivative 12 of the 68000 processor family. They are mainly targeted at embedded 13 applications, and are all System-On-Chip (SOC) devices, as opposed 14 to stand alone CPUs. They implement a subset of the original 68000 15 processor instruction set. 16 If you anticipate running this kernel on a computer with a classic 17 MC68xxx processor, select M68KCLASSIC. 18 If you anticipate running this kernel on a computer with a ColdFire 19 processor, select COLDFIRE. 20 21config M68KCLASSIC 22 bool "Classic M68K CPU family support" 23 select HAVE_ARCH_PFN_VALID 24 25config COLDFIRE 26 bool "Coldfire CPU family support" 27 select ARCH_HAVE_CUSTOM_GPIO_H 28 select CPU_HAS_NO_BITFIELDS 29 select CPU_HAS_NO_CAS 30 select CPU_HAS_NO_MULDIV64 31 select GENERIC_CSUM 32 select GPIOLIB 33 select HAVE_LEGACY_CLK 34 35endchoice 36 37if M68KCLASSIC 38 39config M68000 40 bool 41 depends on !MMU 42 select CPU_HAS_NO_BITFIELDS 43 select CPU_HAS_NO_CAS 44 select CPU_HAS_NO_MULDIV64 45 select CPU_HAS_NO_UNALIGNED 46 select GENERIC_CSUM 47 select CPU_NO_EFFICIENT_FFS 48 select HAVE_ARCH_HASH 49 help 50 The Freescale (was Motorola) 68000 CPU is the first generation of 51 the well known M68K family of processors. The CPU core as well as 52 being available as a stand alone CPU was also used in many 53 System-On-Chip devices (eg 68328, 68302, etc). It does not contain 54 a paging MMU. 55 56config MCPU32 57 bool 58 select CPU_HAS_NO_BITFIELDS 59 select CPU_HAS_NO_CAS 60 select CPU_HAS_NO_UNALIGNED 61 select CPU_NO_EFFICIENT_FFS 62 help 63 The Freescale (was then Motorola) CPU32 is a CPU core that is 64 based on the 68020 processor. For the most part it is used in 65 System-On-Chip parts, and does not contain a paging MMU. 66 67config M68020 68 bool "68020 support" 69 depends on MMU 70 select FPU 71 select CPU_HAS_ADDRESS_SPACES 72 help 73 If you anticipate running this kernel on a computer with a MC68020 74 processor, say Y. Otherwise, say N. Note that the 68020 requires a 75 68851 MMU (Memory Management Unit) to run Linux/m68k, except on the 76 Sun 3, which provides its own version. 77 78config M68030 79 bool "68030 support" 80 depends on MMU && !MMU_SUN3 81 select FPU 82 select CPU_HAS_ADDRESS_SPACES 83 help 84 If you anticipate running this kernel on a computer with a MC68030 85 processor, say Y. Otherwise, say N. Note that a MC68EC030 will not 86 work, as it does not include an MMU (Memory Management Unit). 87 88config M68040 89 bool "68040 support" 90 depends on MMU && !MMU_SUN3 91 select FPU 92 select CPU_HAS_ADDRESS_SPACES 93 help 94 If you anticipate running this kernel on a computer with a MC68LC040 95 or MC68040 processor, say Y. Otherwise, say N. Note that an 96 MC68EC040 will not work, as it does not include an MMU (Memory 97 Management Unit). 98 99config M68060 100 bool "68060 support" 101 depends on MMU && !MMU_SUN3 102 select FPU 103 select CPU_HAS_ADDRESS_SPACES 104 help 105 If you anticipate running this kernel on a computer with a MC68060 106 processor, say Y. Otherwise, say N. 107 108config M68328 109 bool 110 depends on !MMU 111 select LEGACY_TIMER_TICK 112 select M68000 113 help 114 Motorola 68328 processor support. 115 116config M68EZ328 117 bool 118 depends on !MMU 119 select LEGACY_TIMER_TICK 120 select M68000 121 help 122 Motorola 68EX328 processor support. 123 124config M68VZ328 125 bool 126 depends on !MMU 127 select LEGACY_TIMER_TICK 128 select M68000 129 help 130 Motorola 68VZ328 processor support. 131 132endif # M68KCLASSIC 133 134if COLDFIRE 135 136choice 137 prompt "ColdFire SoC type" 138 default M520x 139 help 140 Select the type of ColdFire System-on-Chip (SoC) that you want 141 to build for. 142 143config M5206 144 bool "MCF5206" 145 depends on !MMU 146 select COLDFIRE_SW_A7 147 select COLDFIRE_TIMERS 148 select HAVE_MBAR 149 select CPU_NO_EFFICIENT_FFS 150 help 151 Motorola ColdFire 5206 processor support. 152 153config M5206e 154 bool "MCF5206e" 155 depends on !MMU 156 select COLDFIRE_SW_A7 157 select COLDFIRE_TIMERS 158 select HAVE_MBAR 159 select CPU_NO_EFFICIENT_FFS 160 help 161 Motorola ColdFire 5206e processor support. 162 163config M520x 164 bool "MCF520x" 165 depends on !MMU 166 select COLDFIRE_PIT_TIMER 167 select HAVE_CACHE_SPLIT 168 help 169 Freescale Coldfire 5207/5208 processor support. 170 171config M523x 172 bool "MCF523x" 173 depends on !MMU 174 select COLDFIRE_PIT_TIMER 175 select HAVE_CACHE_SPLIT 176 select HAVE_IPSBAR 177 help 178 Freescale Coldfire 5230/1/2/4/5 processor support 179 180config M5249 181 bool "MCF5249" 182 depends on !MMU 183 select COLDFIRE_SW_A7 184 select COLDFIRE_TIMERS 185 select HAVE_MBAR 186 select CPU_NO_EFFICIENT_FFS 187 help 188 Motorola ColdFire 5249 processor support. 189 190config M525x 191 bool "MCF525x" 192 depends on !MMU 193 select COLDFIRE_SW_A7 194 select COLDFIRE_TIMERS 195 select HAVE_MBAR 196 select CPU_NO_EFFICIENT_FFS 197 help 198 Freescale (Motorola) Coldfire 5251/5253 processor support. 199 200config M5271 201 bool "MCF5271" 202 depends on !MMU 203 select COLDFIRE_PIT_TIMER 204 select M527x 205 select HAVE_CACHE_SPLIT 206 select HAVE_IPSBAR 207 help 208 Freescale (Motorola) ColdFire 5270/5271 processor support. 209 210config M5272 211 bool "MCF5272" 212 depends on !MMU 213 select COLDFIRE_SW_A7 214 select COLDFIRE_TIMERS 215 select HAVE_MBAR 216 select CPU_NO_EFFICIENT_FFS 217 help 218 Motorola ColdFire 5272 processor support. 219 220config M5275 221 bool "MCF5275" 222 depends on !MMU 223 select COLDFIRE_PIT_TIMER 224 select M527x 225 select HAVE_CACHE_SPLIT 226 select HAVE_IPSBAR 227 help 228 Freescale (Motorola) ColdFire 5274/5275 processor support. 229 230config M528x 231 bool "MCF528x" 232 depends on !MMU 233 select COLDFIRE_PIT_TIMER 234 select HAVE_CACHE_SPLIT 235 select HAVE_IPSBAR 236 help 237 Motorola ColdFire 5280/5282 processor support. 238 239config M5307 240 bool "MCF5307" 241 depends on !MMU 242 select COLDFIRE_TIMERS 243 select COLDFIRE_SW_A7 244 select HAVE_CACHE_CB 245 select HAVE_MBAR 246 select CPU_NO_EFFICIENT_FFS 247 help 248 Motorola ColdFire 5307 processor support. 249 250config M532x 251 bool "MCF532x" 252 depends on !MMU 253 select COLDFIRE_TIMERS 254 select M53xx 255 select HAVE_CACHE_CB 256 help 257 Freescale (Motorola) ColdFire 532x processor support. 258 259config M537x 260 bool "MCF537x" 261 depends on !MMU 262 select COLDFIRE_TIMERS 263 select M53xx 264 select HAVE_CACHE_CB 265 help 266 Freescale ColdFire 537x processor support. 267 268config M5407 269 bool "MCF5407" 270 depends on !MMU 271 select COLDFIRE_SW_A7 272 select COLDFIRE_TIMERS 273 select HAVE_CACHE_CB 274 select HAVE_MBAR 275 select CPU_NO_EFFICIENT_FFS 276 help 277 Motorola ColdFire 5407 processor support. 278 279config M547x 280 bool "MCF547x" 281 select M54xx 282 select COLDFIRE_SLTIMERS 283 select MMU_COLDFIRE if MMU 284 select FPU if MMU 285 select HAVE_CACHE_CB 286 select HAVE_MBAR 287 select CPU_NO_EFFICIENT_FFS 288 help 289 Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support. 290 291config M548x 292 bool "MCF548x" 293 select COLDFIRE_SLTIMERS 294 select MMU_COLDFIRE if MMU 295 select FPU if MMU 296 select M54xx 297 select HAVE_CACHE_CB 298 select HAVE_MBAR 299 select CPU_NO_EFFICIENT_FFS 300 help 301 Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support. 302 303config M5441x 304 bool "MCF5441x" 305 select COLDFIRE_PIT_TIMER 306 select MMU_COLDFIRE if MMU 307 select HAVE_CACHE_CB 308 help 309 Freescale Coldfire 54410/54415/54416/54417/54418 processor support. 310 311endchoice 312 313config M527x 314 bool 315 316config M53xx 317 bool 318 319config M54xx 320 select HAVE_PCI 321 bool 322 323config COLDFIRE_PIT_TIMER 324 bool 325 326config COLDFIRE_TIMERS 327 bool 328 select LEGACY_TIMER_TICK 329 330config COLDFIRE_SLTIMERS 331 bool 332 select LEGACY_TIMER_TICK 333 334endif # COLDFIRE 335 336 337comment "Processor Specific Options" 338 339config M68KFPU_EMU 340 bool "Math emulation support" 341 depends on MMU 342 help 343 At some point in the future, this will cause floating-point math 344 instructions to be emulated by the kernel on machines that lack a 345 floating-point math coprocessor. Thrill-seekers and chronically 346 sleep-deprived psychotic hacker types can say Y now, everyone else 347 should probably wait a while. 348 349config M68KFPU_EMU_EXTRAPREC 350 bool "Math emulation extra precision" 351 depends on M68KFPU_EMU 352 help 353 The fpu uses normally a few bit more during calculations for 354 correct rounding, the emulator can (often) do the same but this 355 extra calculation can cost quite some time, so you can disable 356 it here. The emulator will then "only" calculate with a 64 bit 357 mantissa and round slightly incorrect, what is more than enough 358 for normal usage. 359 360config M68KFPU_EMU_ONLY 361 bool "Math emulation only kernel" 362 depends on M68KFPU_EMU 363 help 364 This option prevents any floating-point instructions from being 365 compiled into the kernel, thereby the kernel doesn't save any 366 floating point context anymore during task switches, so this 367 kernel will only be usable on machines without a floating-point 368 math coprocessor. This makes the kernel a bit faster as no tests 369 needs to be executed whether a floating-point instruction in the 370 kernel should be executed or not. 371 372config ADVANCED 373 bool "Advanced configuration options" 374 depends on MMU 375 help 376 This gives you access to some advanced options for the CPU. The 377 defaults should be fine for most users, but these options may make 378 it possible for you to improve performance somewhat if you know what 379 you are doing. 380 381 Note that the answer to this question won't directly affect the 382 kernel: saying N will just cause the configurator to skip all 383 the questions about these options. 384 385 Most users should say N to this question. 386 387config RMW_INSNS 388 bool "Use read-modify-write instructions" 389 depends on ADVANCED && !CPU_HAS_NO_CAS 390 help 391 This allows to use certain instructions that work with indivisible 392 read-modify-write bus cycles. While this is faster than the 393 workaround of disabling interrupts, it can conflict with DMA 394 ( = direct memory access) on many Amiga systems, and it is also said 395 to destabilize other machines. It is very likely that this will 396 cause serious problems on any Amiga or Atari Medusa if set. The only 397 configuration where it should work are 68030-based Ataris, where it 398 apparently improves performance. But you've been warned! Unless you 399 really know what you are doing, say N. Try Y only if you're quite 400 adventurous. 401 402config SINGLE_MEMORY_CHUNK 403 bool "Use one physical chunk of memory only" if ADVANCED && !SUN3 404 depends on MMU 405 default y if SUN3 || MMU_COLDFIRE 406 help 407 Ignore all but the first contiguous chunk of physical memory for VM 408 purposes. This will save a few bytes kernel size and may speed up 409 some operations. 410 When this option os set to N, you may want to lower "Maximum zone 411 order" to save memory that could be wasted for unused memory map. 412 Say N if not sure. 413 414config FORCE_MAX_ZONEORDER 415 int "Maximum zone order" if ADVANCED 416 depends on !SINGLE_MEMORY_CHUNK 417 default "11" 418 help 419 The kernel memory allocator divides physically contiguous memory 420 blocks into "zones", where each zone is a power of two number of 421 pages. This option selects the largest power of two that the kernel 422 keeps in the memory allocator. If you need to allocate very large 423 blocks of physically contiguous memory, then you may need to 424 increase this value. 425 426 For systems that have holes in their physical address space this 427 value also defines the minimal size of the hole that allows 428 freeing unused memory map. 429 430 This config option is actually maximum order plus one. For example, 431 a value of 11 means that the largest free memory block is 2^10 pages. 432 433config 060_WRITETHROUGH 434 bool "Use write-through caching for 68060 supervisor accesses" 435 depends on ADVANCED && M68060 436 help 437 The 68060 generally uses copyback caching of recently accessed data. 438 Copyback caching means that memory writes will be held in an on-chip 439 cache and only written back to memory some time later. Saying Y 440 here will force supervisor (kernel) accesses to use writethrough 441 caching. Writethrough caching means that data is written to memory 442 straight away, so that cache and memory data always agree. 443 Writethrough caching is less efficient, but is needed for some 444 drivers on 68060 based systems where the 68060 bus snooping signal 445 is hardwired on. The 53c710 SCSI driver is known to suffer from 446 this problem. 447 448config M68K_L2_CACHE 449 bool 450 depends on MAC 451 default y 452 453config CPU_HAS_NO_BITFIELDS 454 bool 455 456config CPU_HAS_NO_CAS 457 bool 458 459config CPU_HAS_NO_MULDIV64 460 bool 461 462config CPU_HAS_NO_UNALIGNED 463 bool 464 465config CPU_HAS_ADDRESS_SPACES 466 bool 467 468config FPU 469 bool 470 471config COLDFIRE_SW_A7 472 bool 473 474config HAVE_CACHE_SPLIT 475 bool 476 477config HAVE_CACHE_CB 478 bool 479 480config HAVE_MBAR 481 bool 482 483config HAVE_IPSBAR 484 bool 485 486config CLOCK_FREQ 487 int "Set the core clock frequency" 488 default "25000000" if M5206 489 default "54000000" if M5206e 490 default "166666666" if M520x 491 default "140000000" if M5249 492 default "150000000" if M527x || M523x 493 default "90000000" if M5307 494 default "50000000" if M5407 495 default "266000000" if M54xx 496 default "66666666" 497 depends on COLDFIRE 498 help 499 Define the CPU clock frequency in use. This is the core clock 500 frequency, it may or may not be the same as the external clock 501 crystal fitted to your board. Some processors have an internal 502 PLL and can have their frequency programmed at run time, others 503 use internal dividers. In general the kernel won't setup a PLL 504 if it is fitted (there are some exceptions). This value will be 505 specific to the exact CPU that you are using. 506 507config OLDMASK 508 bool "Old mask 5307 (1H55J) silicon" 509 depends on M5307 510 help 511 Build support for the older revision ColdFire 5307 silicon. 512 Specifically this is the 1H55J mask revision. 513 514if HAVE_CACHE_SPLIT 515choice 516 prompt "Split Cache Configuration" 517 default CACHE_I 518 519config CACHE_I 520 bool "Instruction" 521 help 522 Use all of the ColdFire CPU cache memory as an instruction cache. 523 524config CACHE_D 525 bool "Data" 526 help 527 Use all of the ColdFire CPU cache memory as a data cache. 528 529config CACHE_BOTH 530 bool "Both" 531 help 532 Split the ColdFire CPU cache, and use half as an instruction cache 533 and half as a data cache. 534endchoice 535endif 536 537if HAVE_CACHE_CB 538choice 539 prompt "Data cache mode" 540 default CACHE_WRITETHRU 541 542config CACHE_WRITETHRU 543 bool "Write-through" 544 help 545 The ColdFire CPU cache is set into Write-through mode. 546 547config CACHE_COPYBACK 548 bool "Copy-back" 549 help 550 The ColdFire CPU cache is set into Copy-back mode. 551endchoice 552endif 553