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
21 depends on CPU_HAS_FPU
23 Selecting this option will enable support for SH processors that
24 have FPU units (ie, SH77xx).
26 This option must be set in order to enable the FPU.
28 config SH64_FPU_DENORM_FLUSH
29 bool "Flush floating point denorms to zero"
30 depends on SH_FPU && SUPERH64
34 prompt "FPU emulation support"
35 depends on !SH_FPU && EXPERIMENTAL
37 Selecting this option will enable support for software FPU emulation.
38 Most SH-3 users will want to say Y here, whereas most SH-4 users will
44 depends on CPU_HAS_DSP
46 Selecting this option will enable support for SH processors that
47 have DSP units (ie, SH2-DSP, SH3-DSP, and SH4AL-DSP).
49 This option must be set in order to enable the DSP.
56 Selecting this option will allow the Linux kernel to use SH3 on-chip
61 config SH_STORE_QUEUES
62 bool "Support for Store Queues"
65 Selecting this option will enable an in-kernel API for manipulating
66 the store queues integrated in the SH-4 processors.
68 config SPECULATIVE_EXECUTION
69 bool "Speculative subroutine return"
70 depends on CPU_SUBTYPE_SH7780 && EXPERIMENTAL
72 This enables support for a speculative instruction fetch for
73 subroutine return. There are various pitfalls associated with
74 this, as outlined in the SH7780 hardware manual.
78 config SH64_USER_MISALIGNED_FIXUP
80 prompt "Fixup misaligned loads/stores occurring in user mode"
83 config SH64_ID2815_WORKAROUND
84 bool "Include workaround for SH5-101 cut2 silicon defect ID2815"
85 depends on CPU_SUBTYPE_SH5_101
90 config CPU_HAS_MASKREG_IRQ
93 config CPU_HAS_IPR_IRQ
99 This will enable the use of SR.RB register bank usage. Processors
100 that are lacking this bit must have another method in place for
101 accomplishing what is taken care of by the banked registers.
103 See <file:Documentation/sh/register-banks.txt> for further
104 information on SR.RB and register banking in the kernel in general.