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_LEGACY_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 select HAVE_PCI 303 bool 304 305endif # COLDFIRE 306 307 308comment "Processor Specific Options" 309 310config M68KFPU_EMU 311 bool "Math emulation support" 312 depends on MMU 313 help 314 At some point in the future, this will cause floating-point math 315 instructions to be emulated by the kernel on machines that lack a 316 floating-point math coprocessor. Thrill-seekers and chronically 317 sleep-deprived psychotic hacker types can say Y now, everyone else 318 should probably wait a while. 319 320config M68KFPU_EMU_EXTRAPREC 321 bool "Math emulation extra precision" 322 depends on M68KFPU_EMU 323 help 324 The fpu uses normally a few bit more during calculations for 325 correct rounding, the emulator can (often) do the same but this 326 extra calculation can cost quite some time, so you can disable 327 it here. The emulator will then "only" calculate with a 64 bit 328 mantissa and round slightly incorrect, what is more than enough 329 for normal usage. 330 331config M68KFPU_EMU_ONLY 332 bool "Math emulation only kernel" 333 depends on M68KFPU_EMU 334 help 335 This option prevents any floating-point instructions from being 336 compiled into the kernel, thereby the kernel doesn't save any 337 floating point context anymore during task switches, so this 338 kernel will only be usable on machines without a floating-point 339 math coprocessor. This makes the kernel a bit faster as no tests 340 needs to be executed whether a floating-point instruction in the 341 kernel should be executed or not. 342 343config ADVANCED 344 bool "Advanced configuration options" 345 depends on MMU 346 help 347 This gives you access to some advanced options for the CPU. The 348 defaults should be fine for most users, but these options may make 349 it possible for you to improve performance somewhat if you know what 350 you are doing. 351 352 Note that the answer to this question won't directly affect the 353 kernel: saying N will just cause the configurator to skip all 354 the questions about these options. 355 356 Most users should say N to this question. 357 358config RMW_INSNS 359 bool "Use read-modify-write instructions" 360 depends on ADVANCED 361 help 362 This allows to use certain instructions that work with indivisible 363 read-modify-write bus cycles. While this is faster than the 364 workaround of disabling interrupts, it can conflict with DMA 365 ( = direct memory access) on many Amiga systems, and it is also said 366 to destabilize other machines. It is very likely that this will 367 cause serious problems on any Amiga or Atari Medusa if set. The only 368 configuration where it should work are 68030-based Ataris, where it 369 apparently improves performance. But you've been warned! Unless you 370 really know what you are doing, say N. Try Y only if you're quite 371 adventurous. 372 373config SINGLE_MEMORY_CHUNK 374 bool "Use one physical chunk of memory only" if ADVANCED && !SUN3 375 depends on MMU 376 default y if SUN3 377 select NEED_MULTIPLE_NODES 378 help 379 Ignore all but the first contiguous chunk of physical memory for VM 380 purposes. This will save a few bytes kernel size and may speed up 381 some operations. Say N if not sure. 382 383config ARCH_DISCONTIGMEM_ENABLE 384 def_bool MMU && !SINGLE_MEMORY_CHUNK 385 386config 060_WRITETHROUGH 387 bool "Use write-through caching for 68060 supervisor accesses" 388 depends on ADVANCED && M68060 389 help 390 The 68060 generally uses copyback caching of recently accessed data. 391 Copyback caching means that memory writes will be held in an on-chip 392 cache and only written back to memory some time later. Saying Y 393 here will force supervisor (kernel) accesses to use writethrough 394 caching. Writethrough caching means that data is written to memory 395 straight away, so that cache and memory data always agree. 396 Writethrough caching is less efficient, but is needed for some 397 drivers on 68060 based systems where the 68060 bus snooping signal 398 is hardwired on. The 53c710 SCSI driver is known to suffer from 399 this problem. 400 401config M68K_L2_CACHE 402 bool 403 depends on MAC 404 default y 405 406config NODES_SHIFT 407 int 408 default "3" 409 depends on !SINGLE_MEMORY_CHUNK 410 411config CPU_HAS_NO_BITFIELDS 412 bool 413 414config CPU_HAS_NO_MULDIV64 415 bool 416 417config CPU_HAS_NO_UNALIGNED 418 bool 419 420config CPU_HAS_ADDRESS_SPACES 421 bool 422 423config FPU 424 bool 425 426config COLDFIRE_SW_A7 427 bool 428 429config HAVE_CACHE_SPLIT 430 bool 431 432config HAVE_CACHE_CB 433 bool 434 435config HAVE_MBAR 436 bool 437 438config HAVE_IPSBAR 439 bool 440 441config CLOCK_FREQ 442 int "Set the core clock frequency" 443 default "25000000" if M5206 444 default "54000000" if M5206e 445 default "166666666" if M520x 446 default "140000000" if M5249 447 default "150000000" if M527x || M523x 448 default "90000000" if M5307 449 default "50000000" if M5407 450 default "266000000" if M54xx 451 default "66666666" 452 depends on COLDFIRE 453 help 454 Define the CPU clock frequency in use. This is the core clock 455 frequency, it may or may not be the same as the external clock 456 crystal fitted to your board. Some processors have an internal 457 PLL and can have their frequency programmed at run time, others 458 use internal dividers. In general the kernel won't setup a PLL 459 if it is fitted (there are some exceptions). This value will be 460 specific to the exact CPU that you are using. 461 462config OLDMASK 463 bool "Old mask 5307 (1H55J) silicon" 464 depends on M5307 465 help 466 Build support for the older revision ColdFire 5307 silicon. 467 Specifically this is the 1H55J mask revision. 468 469if HAVE_CACHE_SPLIT 470choice 471 prompt "Split Cache Configuration" 472 default CACHE_I 473 474config CACHE_I 475 bool "Instruction" 476 help 477 Use all of the ColdFire CPU cache memory as an instruction cache. 478 479config CACHE_D 480 bool "Data" 481 help 482 Use all of the ColdFire CPU cache memory as a data cache. 483 484config CACHE_BOTH 485 bool "Both" 486 help 487 Split the ColdFire CPU cache, and use half as an instruction cache 488 and half as a data cache. 489endchoice 490endif 491 492if HAVE_CACHE_CB 493choice 494 prompt "Data cache mode" 495 default CACHE_WRITETHRU 496 497config CACHE_WRITETHRU 498 bool "Write-through" 499 help 500 The ColdFire CPU cache is set into Write-through mode. 501 502config CACHE_COPYBACK 503 bool "Copy-back" 504 help 505 The ColdFire CPU cache is set into Copy-back mode. 506endchoice 507endif 508 509