Current File : //usr/src/linux-headers-5.15.0-125-generic/arch/sh/Kconfig.cpu
# SPDX-License-Identifier: GPL-2.0
menu "Processor features"
choice
prompt "Endianness selection"
default CPU_LITTLE_ENDIAN
help
Some SuperH machines can be configured for either little or big
endian byte order. These modes require different kernels.
config CPU_LITTLE_ENDIAN
bool "Little Endian"
config CPU_BIG_ENDIAN
bool "Big Endian"
endchoice
config SH_FPU
def_bool y
prompt "FPU support"
depends on CPU_HAS_FPU
help
Selecting this option will enable support for SH processors that
have FPU units (ie, SH77xx).
This option must be set in order to enable the FPU.
config SH_FPU_EMU
def_bool n
prompt "FPU emulation support"
depends on !SH_FPU
help
Selecting this option will enable support for software FPU emulation.
Most SH-3 users will want to say Y here, whereas most SH-4 users will
want to say N.
config SH_DSP
def_bool y
prompt "DSP support"
depends on CPU_HAS_DSP
help
Selecting this option will enable support for SH processors that
have DSP units (ie, SH2-DSP, SH3-DSP, and SH4AL-DSP).
This option must be set in order to enable the DSP.
config SH_ADC
def_bool y
prompt "ADC support"
depends on CPU_SH3
help
Selecting this option will allow the Linux kernel to use SH3 on-chip
ADC module.
If unsure, say N.
config SH_STORE_QUEUES
bool "Support for Store Queues"
depends on CPU_SH4
help
Selecting this option will enable an in-kernel API for manipulating
the store queues integrated in the SH-4 processors.
config SPECULATIVE_EXECUTION
bool "Speculative subroutine return"
depends on CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785 || CPU_SUBTYPE_SH7786
help
This enables support for a speculative instruction fetch for
subroutine return. There are various pitfalls associated with
this, as outlined in the SH7780 hardware manual.
If unsure, say N.
config CPU_HAS_INTEVT
bool
config CPU_HAS_IPR_IRQ
bool
config CPU_HAS_SR_RB
bool
help
This will enable the use of SR.RB register bank usage. Processors
that are lacking this bit must have another method in place for
accomplishing what is taken care of by the banked registers.
See <file:Documentation/sh/register-banks.rst> for further
information on SR.RB and register banking in the kernel in general.
config CPU_HAS_PTEAEX
bool
config CPU_HAS_DSP
bool
config CPU_HAS_FPU
bool
endmenu
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