1 menu "Processor features"
4 prompt "Endianess selection"
5 default CPU_LITTLE_ENDIAN
7 Some SuperH machines can be configured for either little or big
8 endian byte order. These modes require different kernels.
10 config CPU_LITTLE_ENDIAN
22 depends on CPU_HAS_FPU
24 Selecting this option will enable support for SH processors that
25 have FPU units (ie, SH77xx).
27 This option must be set in order to enable the FPU.
29 config SH64_FPU_DENORM_FLUSH
30 bool "Flush floating point denorms to zero"
31 depends on SH_FPU && SUPERH64
35 prompt "FPU emulation support"
36 depends on !SH_FPU && EXPERIMENTAL
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
45 depends on CPU_HAS_DSP
47 Selecting this option will enable support for SH processors that
48 have DSP units (ie, SH2-DSP, SH3-DSP, and SH4AL-DSP).
50 This option must be set in order to enable the DSP.
57 Selecting this option will allow the Linux kernel to use SH3 on-chip
62 config SH_STORE_QUEUES
63 bool "Support for Store Queues"
66 Selecting this option will enable an in-kernel API for manipulating
67 the store queues integrated in the SH-4 processors.
69 config SPECULATIVE_EXECUTION
70 bool "Speculative subroutine return"
71 depends on CPU_SUBTYPE_SH7780 && EXPERIMENTAL
73 This enables support for a speculative instruction fetch for
74 subroutine return. There are various pitfalls associated with
75 this, as outlined in the SH7780 hardware manual.
79 config SH64_ID2815_WORKAROUND
80 bool "Include workaround for SH5-101 cut2 silicon defect ID2815"
81 depends on CPU_SUBTYPE_SH5_101
86 config CPU_HAS_IPR_IRQ
92 This will enable the use of SR.RB register bank usage. Processors
93 that are lacking this bit must have another method in place for
94 accomplishing what is taken care of by the banked registers.
96 See <file:Documentation/sh/register-banks.txt> for further
97 information on SR.RB and register banking in the kernel in general.