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 24config COLDFIRE 25 bool "Coldfire CPU family support" 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 GPIOLIB 31 select HAVE_CLK 32 33endchoice 34 35if M68KCLASSIC 36 37config M68000 38 bool "MC68000" 39 depends on !MMU 40 select CPU_HAS_NO_BITFIELDS 41 select CPU_HAS_NO_MULDIV64 42 select CPU_HAS_NO_UNALIGNED 43 select GENERIC_CSUM 44 select CPU_NO_EFFICIENT_FFS 45 select HAVE_ARCH_HASH 46 help 47 The Freescale (was Motorola) 68000 CPU is the first generation of 48 the well known M68K family of processors. The CPU core as well as 49 being available as a stand alone CPU was also used in many 50 System-On-Chip devices (eg 68328, 68302, etc). It does not contain 51 a paging MMU. 52 53config MCPU32 54 bool 55 select CPU_HAS_NO_BITFIELDS 56 select CPU_HAS_NO_UNALIGNED 57 select CPU_NO_EFFICIENT_FFS 58 help 59 The Freescale (was then Motorola) CPU32 is a CPU core that is 60 based on the 68020 processor. For the most part it is used in 61 System-On-Chip parts, and does not contain a paging MMU. 62 63config M68020 64 bool "68020 support" 65 depends on MMU 66 select FPU 67 select CPU_HAS_ADDRESS_SPACES 68 help 69 If you anticipate running this kernel on a computer with a MC68020 70 processor, say Y. Otherwise, say N. Note that the 68020 requires a 71 68851 MMU (Memory Management Unit) to run Linux/m68k, except on the 72 Sun 3, which provides its own version. 73 74config M68030 75 bool "68030 support" 76 depends on MMU && !MMU_SUN3 77 select FPU 78 select CPU_HAS_ADDRESS_SPACES 79 help 80 If you anticipate running this kernel on a computer with a MC68030 81 processor, say Y. Otherwise, say N. Note that a MC68EC030 will not 82 work, as it does not include an MMU (Memory Management Unit). 83 84config M68040 85 bool "68040 support" 86 depends on MMU && !MMU_SUN3 87 select FPU 88 select CPU_HAS_ADDRESS_SPACES 89 help 90 If you anticipate running this kernel on a computer with a MC68LC040 91 or MC68040 processor, say Y. Otherwise, say N. Note that an 92 MC68EC040 will not work, as it does not include an MMU (Memory 93 Management Unit). 94 95config M68060 96 bool "68060 support" 97 depends on MMU && !MMU_SUN3 98 select FPU 99 select CPU_HAS_ADDRESS_SPACES 100 help 101 If you anticipate running this kernel on a computer with a MC68060 102 processor, say Y. Otherwise, say N. 103 104config M68328 105 bool "MC68328" 106 depends on !MMU 107 select M68000 108 help 109 Motorola 68328 processor support. 110 111config M68EZ328 112 bool "MC68EZ328" 113 depends on !MMU 114 select M68000 115 help 116 Motorola 68EX328 processor support. 117 118config M68VZ328 119 bool "MC68VZ328" 120 depends on !MMU 121 select M68000 122 help 123 Motorola 68VZ328 processor support. 124 125endif # M68KCLASSIC 126 127if COLDFIRE 128 129choice 130 prompt "ColdFire SoC type" 131 default M520x 132 help 133 Select the type of ColdFire System-on-Chip (SoC) that you want 134 to build for. 135 136config M5206 137 bool "MCF5206" 138 depends on !MMU 139 select COLDFIRE_SW_A7 140 select HAVE_MBAR 141 select CPU_NO_EFFICIENT_FFS 142 help 143 Motorola ColdFire 5206 processor support. 144 145config M5206e 146 bool "MCF5206e" 147 depends on !MMU 148 select COLDFIRE_SW_A7 149 select HAVE_MBAR 150 select CPU_NO_EFFICIENT_FFS 151 help 152 Motorola ColdFire 5206e processor support. 153 154config M520x 155 bool "MCF520x" 156 depends on !MMU 157 select GENERIC_CLOCKEVENTS 158 select HAVE_CACHE_SPLIT 159 help 160 Freescale Coldfire 5207/5208 processor support. 161 162config M523x 163 bool "MCF523x" 164 depends on !MMU 165 select GENERIC_CLOCKEVENTS 166 select HAVE_CACHE_SPLIT 167 select HAVE_IPSBAR 168 help 169 Freescale Coldfire 5230/1/2/4/5 processor support 170 171config M5249 172 bool "MCF5249" 173 depends on !MMU 174 select COLDFIRE_SW_A7 175 select HAVE_MBAR 176 select CPU_NO_EFFICIENT_FFS 177 help 178 Motorola ColdFire 5249 processor support. 179 180config M525x 181 bool "MCF525x" 182 depends on !MMU 183 select COLDFIRE_SW_A7 184 select HAVE_MBAR 185 select CPU_NO_EFFICIENT_FFS 186 help 187 Freescale (Motorola) Coldfire 5251/5253 processor support. 188 189config M5271 190 bool "MCF5271" 191 depends on !MMU 192 select M527x 193 select HAVE_CACHE_SPLIT 194 select HAVE_IPSBAR 195 select GENERIC_CLOCKEVENTS 196 help 197 Freescale (Motorola) ColdFire 5270/5271 processor support. 198 199config M5272 200 bool "MCF5272" 201 depends on !MMU 202 select COLDFIRE_SW_A7 203 select HAVE_MBAR 204 select CPU_NO_EFFICIENT_FFS 205 help 206 Motorola ColdFire 5272 processor support. 207 208config M5275 209 bool "MCF5275" 210 depends on !MMU 211 select M527x 212 select HAVE_CACHE_SPLIT 213 select HAVE_IPSBAR 214 select GENERIC_CLOCKEVENTS 215 help 216 Freescale (Motorola) ColdFire 5274/5275 processor support. 217 218config M528x 219 bool "MCF528x" 220 depends on !MMU 221 select GENERIC_CLOCKEVENTS 222 select HAVE_CACHE_SPLIT 223 select HAVE_IPSBAR 224 help 225 Motorola ColdFire 5280/5282 processor support. 226 227config M5307 228 bool "MCF5307" 229 depends on !MMU 230 select COLDFIRE_SW_A7 231 select HAVE_CACHE_CB 232 select HAVE_MBAR 233 select CPU_NO_EFFICIENT_FFS 234 help 235 Motorola ColdFire 5307 processor support. 236 237config M532x 238 bool "MCF532x" 239 depends on !MMU 240 select M53xx 241 select HAVE_CACHE_CB 242 help 243 Freescale (Motorola) ColdFire 532x processor support. 244 245config M537x 246 bool "MCF537x" 247 depends on !MMU 248 select M53xx 249 select HAVE_CACHE_CB 250 help 251 Freescale ColdFire 537x processor support. 252 253config M5407 254 bool "MCF5407" 255 depends on !MMU 256 select COLDFIRE_SW_A7 257 select HAVE_CACHE_CB 258 select HAVE_MBAR 259 select CPU_NO_EFFICIENT_FFS 260 help 261 Motorola ColdFire 5407 processor support. 262 263config M547x 264 bool "MCF547x" 265 select M54xx 266 select MMU_COLDFIRE if MMU 267 select FPU if MMU 268 select HAVE_CACHE_CB 269 select HAVE_MBAR 270 select CPU_NO_EFFICIENT_FFS 271 help 272 Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support. 273 274config M548x 275 bool "MCF548x" 276 select MMU_COLDFIRE if MMU 277 select FPU if MMU 278 select M54xx 279 select HAVE_CACHE_CB 280 select HAVE_MBAR 281 select CPU_NO_EFFICIENT_FFS 282 help 283 Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support. 284 285config M5441x 286 bool "MCF5441x" 287 select MMU_COLDFIRE if MMU 288 select GENERIC_CLOCKEVENTS 289 select HAVE_CACHE_CB 290 help 291 Freescale Coldfire 54410/54415/54416/54417/54418 processor support. 292 293endchoice 294 295config M527x 296 bool 297 298config M53xx 299 bool 300 301config M54xx 302 bool 303 304endif # COLDFIRE 305 306 307comment "Processor Specific Options" 308 309config M68KFPU_EMU 310 bool "Math emulation support" 311 depends on MMU 312 help 313 At some point in the future, this will cause floating-point math 314 instructions to be emulated by the kernel on machines that lack a 315 floating-point math coprocessor. Thrill-seekers and chronically 316 sleep-deprived psychotic hacker types can say Y now, everyone else 317 should probably wait a while. 318 319config M68KFPU_EMU_EXTRAPREC 320 bool "Math emulation extra precision" 321 depends on M68KFPU_EMU 322 help 323 The fpu uses normally a few bit more during calculations for 324 correct rounding, the emulator can (often) do the same but this 325 extra calculation can cost quite some time, so you can disable 326 it here. The emulator will then "only" calculate with a 64 bit 327 mantissa and round slightly incorrect, what is more than enough 328 for normal usage. 329 330config M68KFPU_EMU_ONLY 331 bool "Math emulation only kernel" 332 depends on M68KFPU_EMU 333 help 334 This option prevents any floating-point instructions from being 335 compiled into the kernel, thereby the kernel doesn't save any 336 floating point context anymore during task switches, so this 337 kernel will only be usable on machines without a floating-point 338 math coprocessor. This makes the kernel a bit faster as no tests 339 needs to be executed whether a floating-point instruction in the 340 kernel should be executed or not. 341 342config ADVANCED 343 bool "Advanced configuration options" 344 depends on MMU 345 ---help--- 346 This gives you access to some advanced options for the CPU. The 347 defaults should be fine for most users, but these options may make 348 it possible for you to improve performance somewhat if you know what 349 you are doing. 350 351 Note that the answer to this question won't directly affect the 352 kernel: saying N will just cause the configurator to skip all 353 the questions about these options. 354 355 Most users should say N to this question. 356 357config RMW_INSNS 358 bool "Use read-modify-write instructions" 359 depends on ADVANCED 360 ---help--- 361 This allows to use certain instructions that work with indivisible 362 read-modify-write bus cycles. While this is faster than the 363 workaround of disabling interrupts, it can conflict with DMA 364 ( = direct memory access) on many Amiga systems, and it is also said 365 to destabilize other machines. It is very likely that this will 366 cause serious problems on any Amiga or Atari Medusa if set. The only 367 configuration where it should work are 68030-based Ataris, where it 368 apparently improves performance. But you've been warned! Unless you 369 really know what you are doing, say N. Try Y only if you're quite 370 adventurous. 371 372config SINGLE_MEMORY_CHUNK 373 bool "Use one physical chunk of memory only" if ADVANCED && !SUN3 374 depends on MMU 375 default y if SUN3 376 select NEED_MULTIPLE_NODES 377 help 378 Ignore all but the first contiguous chunk of physical memory for VM 379 purposes. This will save a few bytes kernel size and may speed up 380 some operations. Say N if not sure. 381 382config ARCH_DISCONTIGMEM_ENABLE 383 def_bool MMU && !SINGLE_MEMORY_CHUNK 384 385config 060_WRITETHROUGH 386 bool "Use write-through caching for 68060 supervisor accesses" 387 depends on ADVANCED && M68060 388 ---help--- 389 The 68060 generally uses copyback caching of recently accessed data. 390 Copyback caching means that memory writes will be held in an on-chip 391 cache and only written back to memory some time later. Saying Y 392 here will force supervisor (kernel) accesses to use writethrough 393 caching. Writethrough caching means that data is written to memory 394 straight away, so that cache and memory data always agree. 395 Writethrough caching is less efficient, but is needed for some 396 drivers on 68060 based systems where the 68060 bus snooping signal 397 is hardwired on. The 53c710 SCSI driver is known to suffer from 398 this problem. 399 400config M68K_L2_CACHE 401 bool 402 depends on MAC 403 default y 404 405config NODES_SHIFT 406 int 407 default "3" 408 depends on !SINGLE_MEMORY_CHUNK 409 410config CPU_HAS_NO_BITFIELDS 411 bool 412 413config CPU_HAS_NO_MULDIV64 414 bool 415 416config CPU_HAS_NO_UNALIGNED 417 bool 418 419config CPU_HAS_ADDRESS_SPACES 420 bool 421 422config FPU 423 bool 424 425config COLDFIRE_SW_A7 426 bool 427 428config HAVE_CACHE_SPLIT 429 bool 430 431config HAVE_CACHE_CB 432 bool 433 434config HAVE_MBAR 435 bool 436 437config HAVE_IPSBAR 438 bool 439 440config CLOCK_FREQ 441 int "Set the core clock frequency" 442 default "25000000" if M5206 443 default "54000000" if M5206e 444 default "166666666" if M520x 445 default "140000000" if M5249 446 default "150000000" if M527x || M523x 447 default "90000000" if M5307 448 default "50000000" if M5407 449 default "266000000" if M54xx 450 default "66666666" 451 depends on COLDFIRE 452 help 453 Define the CPU clock frequency in use. This is the core clock 454 frequency, it may or may not be the same as the external clock 455 crystal fitted to your board. Some processors have an internal 456 PLL and can have their frequency programmed at run time, others 457 use internal dividers. In general the kernel won't setup a PLL 458 if it is fitted (there are some exceptions). This value will be 459 specific to the exact CPU that you are using. 460 461config OLDMASK 462 bool "Old mask 5307 (1H55J) silicon" 463 depends on M5307 464 help 465 Build support for the older revision ColdFire 5307 silicon. 466 Specifically this is the 1H55J mask revision. 467 468if HAVE_CACHE_SPLIT 469choice 470 prompt "Split Cache Configuration" 471 default CACHE_I 472 473config CACHE_I 474 bool "Instruction" 475 help 476 Use all of the ColdFire CPU cache memory as an instruction cache. 477 478config CACHE_D 479 bool "Data" 480 help 481 Use all of the ColdFire CPU cache memory as a data cache. 482 483config CACHE_BOTH 484 bool "Both" 485 help 486 Split the ColdFire CPU cache, and use half as an instruction cache 487 and half as a data cache. 488endchoice 489endif 490 491if HAVE_CACHE_CB 492choice 493 prompt "Data cache mode" 494 default CACHE_WRITETHRU 495 496config CACHE_WRITETHRU 497 bool "Write-through" 498 help 499 The ColdFire CPU cache is set into Write-through mode. 500 501config CACHE_COPYBACK 502 bool "Copy-back" 503 help 504 The ColdFire CPU cache is set into Copy-back mode. 505endchoice 506endif 507 508