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| author | Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> | 2020-03-05 23:02:51 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2020-03-16 20:30:49 +0300 |
| commit | 7321e2ea0d6aece516a9c0827028ecda2ccaeae9 (patch) | |
| tree | d53d77373a555448b2ef633c04e84dc9f3c6cc38 /arch/arc/Kconfig | |
| parent | 4827d0cf744e7e9cc73f10e1f4eaca904a3868c1 (diff) | |
| download | linux-7321e2ea0d6aece516a9c0827028ecda2ccaeae9.tar.xz | |
ARC: add support for DSP-enabled userspace applications
To be able to run DSP-enabled userspace applications we need to
save and restore following DSP-related registers:
At IRQ/exception entry/exit:
* DSP_CTRL (save it and reset to value suitable for kernel)
* ACC0_LO, ACC0_HI (we already save them as r58, r59 pair)
At context switch:
* ACC0_GLO, ACC0_GHI
* DSP_BFLY0, DSP_FFT_CTRL
Reviewed-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/Kconfig')
| -rw-r--r-- | arch/arc/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 55432a8fc20d..eb3bcb206882 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -411,6 +411,9 @@ config ARC_HAS_ACCL_REGS config ARC_DSP_HANDLED def_bool n +config ARC_DSP_SAVE_RESTORE_REGS + def_bool n + choice prompt "DSP support" default ARC_DSP_NONE @@ -433,6 +436,15 @@ config ARC_DSP_KERNEL 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 + +config ARC_DSP_USERSPACE + bool "Support DSP for userspace apps" + select ARC_HAS_ACCL_REGS + select ARC_DSP_HANDLED + select ARC_DSP_SAVE_RESTORE_REGS + help + DSP extension presence in HW, support save / restore DSP registers to + run DSP-enabled userspace applications endchoice config ARC_IRQ_NO_AUTOSAVE |