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- # 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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