Root/arch/sh/Kconfig.cpu

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
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 CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785 || CPU_SUBTYPE_SH7786
72    help
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.
76
77      If unsure, say N.
78
79config SH64_ID2815_WORKAROUND
80    bool "Include workaround for SH5-101 cut2 silicon defect ID2815"
81    depends on CPU_SUBTYPE_SH5_101
82
83config CPU_HAS_INTEVT
84    bool
85
86config CPU_HAS_IPR_IRQ
87    bool
88
89config CPU_HAS_SR_RB
90    bool
91    help
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.
95
96      See <file:Documentation/sh/register-banks.txt> for further
97      information on SR.RB and register banking in the kernel in general.
98
99config CPU_HAS_PTEAEX
100    bool
101
102config CPU_HAS_DSP
103    bool
104
105config CPU_HAS_FPU
106    bool
107
108endmenu
109

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