linux/arch/sh/Kconfig.cpu
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   1menu "Processor features"
   2
   3choice
   4        prompt "Endianness selection" 
   5        default CPU_LITTLE_ENDIAN
   6        help
   7          Some SuperH machines can be configured for either little or big
   8          endian byte order. These modes require different kernels.
   9
  10config CPU_LITTLE_ENDIAN
  11        bool "Little Endian"
  12
  13config CPU_BIG_ENDIAN
  14        bool "Big Endian"
  15        depends on !CPU_SH5
  16
  17endchoice
  18
  19config SH_FPU
  20        def_bool y
  21        prompt "FPU support"
  22        depends on CPU_HAS_FPU
  23        help
  24          Selecting this option will enable support for SH processors that
  25          have FPU units (ie, SH77xx).
  26
  27          This option must be set in order to enable the FPU.
  28
  29config SH64_FPU_DENORM_FLUSH
  30        bool "Flush floating point denorms to zero"
  31        depends on SH_FPU && SUPERH64
  32
  33config SH_FPU_EMU
  34        def_bool n
  35        prompt "FPU emulation support"
  36        depends on !SH_FPU && EXPERIMENTAL
  37        help
  38          Selecting this option will enable support for software FPU emulation.
  39          Most SH-3 users will want to say Y here, whereas most SH-4 users will
  40          want to say N.
  41
  42config SH_DSP
  43        def_bool y
  44        prompt "DSP support"
  45        depends on CPU_HAS_DSP
  46        help
  47          Selecting this option will enable support for SH processors that
  48          have DSP units (ie, SH2-DSP, SH3-DSP, and SH4AL-DSP).
  49
  50          This option must be set in order to enable the DSP.
  51
  52config SH_ADC
  53        def_bool y
  54        prompt "ADC support"
  55        depends on CPU_SH3
  56        help
  57          Selecting this option will allow the Linux kernel to use SH3 on-chip
  58          ADC module.
  59
  60          If unsure, say N.
  61
  62config SH_STORE_QUEUES
  63        bool "Support for Store Queues"
  64        depends on CPU_SH4
  65        help
  66          Selecting this option will enable an in-kernel API for manipulating
  67          the store queues integrated in the SH-4 processors.
  68
  69config SPECULATIVE_EXECUTION
  70        bool "Speculative subroutine return"
  71        depends on EXPERIMENTAL
  72        depends on CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785 || CPU_SUBTYPE_SH7786
  73        help
  74          This enables support for a speculative instruction fetch for
  75          subroutine return. There are various pitfalls associated with
  76          this, as outlined in the SH7780 hardware manual.
  77
  78          If unsure, say N.
  79
  80config SH64_ID2815_WORKAROUND
  81        bool "Include workaround for SH5-101 cut2 silicon defect ID2815"
  82        depends on CPU_SUBTYPE_SH5_101
  83
  84config CPU_HAS_INTEVT
  85        bool
  86
  87config CPU_HAS_IPR_IRQ
  88        bool
  89
  90config CPU_HAS_SR_RB
  91        bool
  92        help
  93          This will enable the use of SR.RB register bank usage. Processors
  94          that are lacking this bit must have another method in place for
  95          accomplishing what is taken care of by the banked registers.
  96
  97          See <file:Documentation/sh/register-banks.txt> for further
  98          information on SR.RB and register banking in the kernel in general.
  99
 100config CPU_HAS_PTEAEX
 101        bool
 102
 103config CPU_HAS_DSP
 104        bool
 105
 106config CPU_HAS_FPU
 107        bool
 108
 109endmenu
 110
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