| # SPDX-License-Identifier: GPL-2.0 |
| comment "Processor Type" |
| |
| choice |
| prompt "CPU family support" |
| default M68KCLASSIC if MMU |
| default COLDFIRE if !MMU |
| help |
| The Freescale (was Motorola) M68K family of processors implements |
| the full 68000 processor instruction set. |
| The Freescale ColdFire family of processors is a modern derivative |
| of the 68000 processor family. They are mainly targeted at embedded |
| applications, and are all System-On-Chip (SOC) devices, as opposed |
| to stand alone CPUs. They implement a subset of the original 68000 |
| processor instruction set. |
| If you anticipate running this kernel on a computer with a classic |
| MC68xxx processor, select M68KCLASSIC. |
| If you anticipate running this kernel on a computer with a ColdFire |
| processor, select COLDFIRE. |
| |
| config M68KCLASSIC |
| bool "Classic M68K CPU family support" |
| select HAVE_ARCH_PFN_VALID |
| |
| config COLDFIRE |
| bool "Coldfire CPU family support" |
| select CPU_HAS_NO_BITFIELDS |
| select CPU_HAS_NO_CAS |
| select CPU_HAS_NO_MULDIV64 |
| select GENERIC_CSUM |
| select GPIOLIB |
| select HAVE_LEGACY_CLK |
| select HAVE_PAGE_SIZE_8KB if !MMU |
| |
| endchoice |
| |
| if M68KCLASSIC |
| |
| config M68000 |
| def_bool y |
| depends on !MMU |
| select CPU_HAS_NO_BITFIELDS |
| select CPU_HAS_NO_CAS |
| select CPU_HAS_NO_MULDIV64 |
| select CPU_HAS_NO_UNALIGNED |
| select GENERIC_CSUM |
| select CPU_NO_EFFICIENT_FFS |
| select HAVE_ARCH_HASH |
| select HAVE_PAGE_SIZE_4KB |
| select LEGACY_TIMER_TICK |
| help |
| The Freescale (was Motorola) 68000 CPU is the first generation of |
| the well known M68K family of processors. The CPU core as well as |
| being available as a stand alone CPU was also used in many |
| System-On-Chip devices (eg 68328, 68302, etc). It does not contain |
| a paging MMU. |
| |
| config M68020 |
| bool "68020 support" |
| depends on MMU |
| select FPU |
| select CPU_HAS_ADDRESS_SPACES |
| help |
| If you anticipate running this kernel on a computer with a MC68020 |
| processor, say Y. Otherwise, say N. Note that the 68020 requires a |
| 68851 MMU (Memory Management Unit) to run Linux/m68k, except on the |
| Sun 3, which provides its own version. |
| |
| config M68030 |
| bool "68030 support" |
| depends on MMU && !MMU_SUN3 |
| select FPU |
| select CPU_HAS_ADDRESS_SPACES |
| help |
| If you anticipate running this kernel on a computer with a MC68030 |
| processor, say Y. Otherwise, say N. Note that a MC68EC030 will not |
| work, as it does not include an MMU (Memory Management Unit). |
| |
| config M68040 |
| bool "68040 support" |
| depends on MMU && !MMU_SUN3 |
| select FPU |
| select CPU_HAS_ADDRESS_SPACES |
| help |
| If you anticipate running this kernel on a computer with a MC68LC040 |
| or MC68040 processor, say Y. Otherwise, say N. Note that an |
| MC68EC040 will not work, as it does not include an MMU (Memory |
| Management Unit). |
| |
| config M68060 |
| bool "68060 support" |
| depends on MMU && !MMU_SUN3 |
| select FPU |
| select CPU_HAS_ADDRESS_SPACES |
| help |
| If you anticipate running this kernel on a computer with a MC68060 |
| processor, say Y. Otherwise, say N. |
| |
| config M68328 |
| bool |
| depends on !MMU |
| select M68000 |
| help |
| Motorola 68328 processor support. |
| |
| config M68EZ328 |
| bool |
| depends on !MMU |
| select M68000 |
| help |
| Motorola 68EX328 processor support. |
| |
| config M68VZ328 |
| bool |
| depends on !MMU |
| select M68000 |
| help |
| Motorola 68VZ328 processor support. |
| |
| endif # M68KCLASSIC |
| |
| if COLDFIRE |
| |
| choice |
| prompt "ColdFire SoC type" |
| default M520x |
| help |
| Select the type of ColdFire System-on-Chip (SoC) that you want |
| to build for. |
| |
| config M5206 |
| bool "MCF5206" |
| depends on !MMU |
| select COLDFIRE_SW_A7 |
| select COLDFIRE_TIMERS |
| select HAVE_MBAR |
| select CPU_NO_EFFICIENT_FFS |
| help |
| Motorola ColdFire 5206 processor support. |
| |
| config M5206e |
| bool "MCF5206e" |
| depends on !MMU |
| select COLDFIRE_SW_A7 |
| select COLDFIRE_TIMERS |
| select HAVE_MBAR |
| select CPU_NO_EFFICIENT_FFS |
| help |
| Motorola ColdFire 5206e processor support. |
| |
| config M520x |
| bool "MCF520x" |
| depends on !MMU |
| select COLDFIRE_PIT_TIMER |
| select HAVE_CACHE_SPLIT |
| help |
| Freescale Coldfire 5207/5208 processor support. |
| |
| config M523x |
| bool "MCF523x" |
| depends on !MMU |
| select COLDFIRE_PIT_TIMER |
| select HAVE_CACHE_SPLIT |
| select HAVE_IPSBAR |
| help |
| Freescale Coldfire 5230/1/2/4/5 processor support |
| |
| config M5249 |
| bool "MCF5249" |
| depends on !MMU |
| select COLDFIRE_SW_A7 |
| select COLDFIRE_TIMERS |
| select HAVE_MBAR |
| select CPU_NO_EFFICIENT_FFS |
| help |
| Motorola ColdFire 5249 processor support. |
| |
| config M525x |
| bool "MCF525x" |
| depends on !MMU |
| select COLDFIRE_SW_A7 |
| select COLDFIRE_TIMERS |
| select HAVE_MBAR |
| select CPU_NO_EFFICIENT_FFS |
| help |
| Freescale (Motorola) Coldfire 5251/5253 processor support. |
| |
| config M5271 |
| bool "MCF5271" |
| depends on !MMU |
| select COLDFIRE_PIT_TIMER |
| select M527x |
| select HAVE_CACHE_SPLIT |
| select HAVE_IPSBAR |
| help |
| Freescale (Motorola) ColdFire 5270/5271 processor support. |
| |
| config M5272 |
| bool "MCF5272" |
| depends on !MMU |
| select COLDFIRE_SW_A7 |
| select COLDFIRE_TIMERS |
| select HAVE_MBAR |
| select CPU_NO_EFFICIENT_FFS |
| help |
| Motorola ColdFire 5272 processor support. |
| |
| config M5275 |
| bool "MCF5275" |
| depends on !MMU |
| select COLDFIRE_PIT_TIMER |
| select M527x |
| select HAVE_CACHE_SPLIT |
| select HAVE_IPSBAR |
| help |
| Freescale (Motorola) ColdFire 5274/5275 processor support. |
| |
| config M528x |
| bool "MCF528x" |
| depends on !MMU |
| select COLDFIRE_PIT_TIMER |
| select HAVE_CACHE_SPLIT |
| select HAVE_IPSBAR |
| help |
| Motorola ColdFire 5280/5282 processor support. |
| |
| config M5307 |
| bool "MCF5307" |
| depends on !MMU |
| select COLDFIRE_TIMERS |
| select COLDFIRE_SW_A7 |
| select HAVE_CACHE_CB |
| select HAVE_MBAR |
| select CPU_NO_EFFICIENT_FFS |
| help |
| Motorola ColdFire 5307 processor support. |
| |
| config M532x |
| bool "MCF532x" |
| depends on !MMU |
| select COLDFIRE_TIMERS |
| select M53xx |
| select HAVE_CACHE_CB |
| help |
| Freescale (Motorola) ColdFire 532x processor support. |
| |
| config M537x |
| bool "MCF537x" |
| depends on !MMU |
| select COLDFIRE_TIMERS |
| select M53xx |
| select HAVE_CACHE_CB |
| help |
| Freescale ColdFire 537x processor support. |
| |
| config M5407 |
| bool "MCF5407" |
| depends on !MMU |
| select COLDFIRE_SW_A7 |
| select COLDFIRE_TIMERS |
| select HAVE_CACHE_CB |
| select HAVE_MBAR |
| select CPU_NO_EFFICIENT_FFS |
| help |
| Motorola ColdFire 5407 processor support. |
| |
| config M547x |
| bool "MCF547x" |
| select M54xx |
| select COLDFIRE_SLTIMERS |
| select MMU_COLDFIRE if MMU |
| select FPU if MMU |
| select HAVE_CACHE_CB |
| select HAVE_MBAR |
| select CPU_NO_EFFICIENT_FFS |
| help |
| Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support. |
| |
| config M548x |
| bool "MCF548x" |
| select COLDFIRE_SLTIMERS |
| select MMU_COLDFIRE if MMU |
| select FPU if MMU |
| select M54xx |
| select HAVE_CACHE_CB |
| select HAVE_MBAR |
| select CPU_NO_EFFICIENT_FFS |
| help |
| Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support. |
| |
| config M5441x |
| bool "MCF5441x" |
| select COLDFIRE_PIT_TIMER |
| select MMU_COLDFIRE if MMU |
| select HAVE_CACHE_CB |
| help |
| Freescale Coldfire 54410/54415/54416/54417/54418 processor support. |
| |
| endchoice |
| |
| config M527x |
| bool |
| |
| config M53xx |
| bool |
| |
| config M54xx |
| select HAVE_PCI |
| bool |
| |
| config COLDFIRE_PIT_TIMER |
| bool |
| |
| config COLDFIRE_TIMERS |
| bool |
| select LEGACY_TIMER_TICK |
| |
| config COLDFIRE_SLTIMERS |
| bool |
| select LEGACY_TIMER_TICK |
| |
| endif # COLDFIRE |
| |
| comment "Processor Specific Options" |
| |
| config M68KFPU_EMU |
| bool "Math emulation support" |
| depends on M68KCLASSIC && FPU |
| help |
| At some point in the future, this will cause floating-point math |
| instructions to be emulated by the kernel on machines that lack a |
| floating-point math coprocessor. Thrill-seekers and chronically |
| sleep-deprived psychotic hacker types can say Y now, everyone else |
| should probably wait a while. |
| |
| config M68KFPU_EMU_EXTRAPREC |
| bool "Math emulation extra precision" |
| depends on M68KFPU_EMU |
| help |
| The fpu uses normally a few bit more during calculations for |
| correct rounding, the emulator can (often) do the same but this |
| extra calculation can cost quite some time, so you can disable |
| it here. The emulator will then "only" calculate with a 64 bit |
| mantissa and round slightly incorrect, what is more than enough |
| for normal usage. |
| |
| config M68KFPU_EMU_ONLY |
| bool "Math emulation only kernel" |
| depends on M68KFPU_EMU |
| help |
| This option prevents any floating-point instructions from being |
| compiled into the kernel, thereby the kernel doesn't save any |
| floating point context anymore during task switches, so this |
| kernel will only be usable on machines without a floating-point |
| math coprocessor. This makes the kernel a bit faster as no tests |
| needs to be executed whether a floating-point instruction in the |
| kernel should be executed or not. |
| |
| config ADVANCED |
| bool "Advanced configuration options" |
| depends on MMU |
| help |
| This gives you access to some advanced options for the CPU. The |
| defaults should be fine for most users, but these options may make |
| it possible for you to improve performance somewhat if you know what |
| you are doing. |
| |
| Note that the answer to this question won't directly affect the |
| kernel: saying N will just cause the configurator to skip all |
| the questions about these options. |
| |
| Most users should say N to this question. |
| |
| config RMW_INSNS |
| bool "Use read-modify-write instructions" |
| depends on ADVANCED && !CPU_HAS_NO_CAS |
| help |
| This allows to use certain instructions that work with indivisible |
| read-modify-write bus cycles. While this is faster than the |
| workaround of disabling interrupts, it can conflict with DMA |
| ( = direct memory access) on many Amiga systems, and it is also said |
| to destabilize other machines. It is very likely that this will |
| cause serious problems on any Amiga or Atari Medusa if set. The only |
| configuration where it should work are 68030-based Ataris, where it |
| apparently improves performance. But you've been warned! Unless you |
| really know what you are doing, say N. Try Y only if you're quite |
| adventurous. |
| |
| config SINGLE_MEMORY_CHUNK |
| bool "Use one physical chunk of memory only" if ADVANCED && !SUN3 |
| depends on MMU |
| default y if SUN3 || MMU_COLDFIRE |
| help |
| Ignore all but the first contiguous chunk of physical memory for VM |
| purposes. This will save a few bytes kernel size and may speed up |
| some operations. |
| When this option os set to N, you may want to lower "Maximum zone |
| order" to save memory that could be wasted for unused memory map. |
| Say N if not sure. |
| |
| config ARCH_FORCE_MAX_ORDER |
| int "Order of maximal physically contiguous allocations" if ADVANCED |
| depends on !SINGLE_MEMORY_CHUNK |
| default "10" |
| help |
| The kernel page allocator limits the size of maximal physically |
| contiguous allocations. The limit is called MAX_PAGE_ORDER and it |
| defines the maximal power of two of number of pages that can be |
| allocated as a single contiguous block. This option allows |
| overriding the default setting when ability to allocate very |
| large blocks of physically contiguous memory is required. |
| |
| For systems that have holes in their physical address space this |
| value also defines the minimal size of the hole that allows |
| freeing unused memory map. |
| |
| Don't change if unsure. |
| |
| config 060_WRITETHROUGH |
| bool "Use write-through caching for 68060 supervisor accesses" |
| depends on ADVANCED && M68060 |
| help |
| The 68060 generally uses copyback caching of recently accessed data. |
| Copyback caching means that memory writes will be held in an on-chip |
| cache and only written back to memory some time later. Saying Y |
| here will force supervisor (kernel) accesses to use writethrough |
| caching. Writethrough caching means that data is written to memory |
| straight away, so that cache and memory data always agree. |
| Writethrough caching is less efficient, but is needed for some |
| drivers on 68060 based systems where the 68060 bus snooping signal |
| is hardwired on. The 53c710 SCSI driver is known to suffer from |
| this problem. |
| |
| config M68K_L2_CACHE |
| bool |
| depends on MAC |
| default y |
| |
| config CPU_HAS_NO_BITFIELDS |
| bool |
| |
| config CPU_HAS_NO_CAS |
| bool |
| |
| config CPU_HAS_NO_MULDIV64 |
| bool |
| |
| config CPU_HAS_NO_UNALIGNED |
| bool |
| |
| config CPU_HAS_ADDRESS_SPACES |
| bool |
| select ALTERNATE_USER_ADDRESS_SPACE |
| |
| config FPU |
| bool |
| |
| config COLDFIRE_SW_A7 |
| bool |
| |
| config HAVE_CACHE_SPLIT |
| bool |
| |
| config HAVE_CACHE_CB |
| bool |
| |
| config HAVE_MBAR |
| bool |
| |
| config HAVE_IPSBAR |
| bool |
| |
| config CLOCK_FREQ |
| int "Set the core clock frequency" |
| default "25000000" if M5206 |
| default "54000000" if M5206e |
| default "166666666" if M520x |
| default "140000000" if M5249 |
| default "150000000" if M527x || M523x |
| default "90000000" if M5307 |
| default "50000000" if M5407 |
| default "266000000" if M54xx |
| default "66666666" |
| depends on COLDFIRE |
| help |
| Define the CPU clock frequency in use. This is the core clock |
| frequency, it may or may not be the same as the external clock |
| crystal fitted to your board. Some processors have an internal |
| PLL and can have their frequency programmed at run time, others |
| use internal dividers. In general the kernel won't setup a PLL |
| if it is fitted (there are some exceptions). This value will be |
| specific to the exact CPU that you are using. |
| |
| config OLDMASK |
| bool "Old mask 5307 (1H55J) silicon" |
| depends on M5307 |
| help |
| Build support for the older revision ColdFire 5307 silicon. |
| Specifically this is the 1H55J mask revision. |
| |
| if HAVE_CACHE_SPLIT |
| choice |
| prompt "Split Cache Configuration" |
| default CACHE_I |
| |
| config CACHE_I |
| bool "Instruction" |
| help |
| Use all of the ColdFire CPU cache memory as an instruction cache. |
| |
| config CACHE_D |
| bool "Data" |
| help |
| Use all of the ColdFire CPU cache memory as a data cache. |
| |
| config CACHE_BOTH |
| bool "Both" |
| help |
| Split the ColdFire CPU cache, and use half as an instruction cache |
| and half as a data cache. |
| endchoice |
| endif # HAVE_CACHE_SPLIT |
| |
| if HAVE_CACHE_CB |
| choice |
| prompt "Data cache mode" |
| default CACHE_WRITETHRU |
| |
| config CACHE_WRITETHRU |
| bool "Write-through" |
| help |
| The ColdFire CPU cache is set into Write-through mode. |
| |
| config CACHE_COPYBACK |
| bool "Copy-back" |
| help |
| The ColdFire CPU cache is set into Copy-back mode. |
| endchoice |
| endif # HAVE_CACHE_CB |
| |
| # Coldfire cores that do not have a data cache configured can do coherent DMA. |
| config COLDFIRE_COHERENT_DMA |
| bool |
| default y |
| depends on COLDFIRE |
| depends on !HAVE_CACHE_CB && !CACHE_D && !CACHE_BOTH |
| |
| config M68K_NONCOHERENT_DMA |
| bool |
| default y |
| depends on HAS_DMA && !COLDFIRE_COHERENT_DMA |
