diff options
Diffstat (limited to 'arch/arc/Kconfig')
| -rw-r--r-- | arch/arc/Kconfig | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 7124ab82dfa3..55432a8fc20d 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -401,13 +401,40 @@ config ARC_HAS_DIV_REM default y config ARC_HAS_ACCL_REGS - bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)" + bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6 and/or DSP)" default y help Depending on the configuration, CPU can contain accumulator reg-pair (also referred to as r58:r59). These can also be used by gcc as GPR so kernel needs to save/restore per process +config ARC_DSP_HANDLED + def_bool n + +choice + prompt "DSP support" + default ARC_DSP_NONE + help + Depending on the configuration, CPU can contain DSP registers + (ACC0_GLO, ACC0_GHI, DSP_BFLY0, DSP_CTRL, DSP_FFT_CTRL). + Bellow is options describing how to handle these registers in + interrupt entry / exit and in context switch. + +config ARC_DSP_NONE + bool "No DSP extension presence in HW" + help + No DSP extension presence in HW + +config ARC_DSP_KERNEL + bool "DSP extension in HW, no support for userspace" + select ARC_HAS_ACCL_REGS + select ARC_DSP_HANDLED + help + DSP extension presence in HW, no support for DSP-enabled userspace + applications. We don't save / restore DSP registers and only do + some minimal preparations so userspace won't be able to break kernel +endchoice + config ARC_IRQ_NO_AUTOSAVE bool "Disable hardware autosave regfile on interrupts" default n |