linux-toradex.git/arch/arc/include/asm/dsp.h, branch v5.18 Linux kernel for Apalis and Colibri modules ARC: allow userspace DSP applications to use AGU extensions 2020-03-16T17:30:49+00:00 Eugeniy Paltsev Eugeniy.Paltsev@synopsys.com 2020-03-05T20:02:52+00:00 f09d3174f002ee2cf15623d5a0f68f7393536ce7 To be able to run DSP-enabled userspace applications with AGU (address generation unit) extensions we additionally need to save and restore following registers at context switch: * AGU_AP* * AGU_OS* * AGU_MOD* Reviewed-by: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> 
To be able to run DSP-enabled userspace applications with AGU
(address generation unit) extensions we additionally need to
save and restore following registers at context switch:
 * AGU_AP*
 * AGU_OS*
 * AGU_MOD*

Reviewed-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
ARC: add support for DSP-enabled userspace applications 2020-03-16T17:30:49+00:00 Eugeniy Paltsev Eugeniy.Paltsev@synopsys.com 2020-03-05T20:02:51+00:00 7321e2ea0d6aece516a9c0827028ecda2ccaeae9 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> 
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>