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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/include/asm/dsp.h | |
| 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/include/asm/dsp.h')
| -rw-r--r-- | arch/arc/include/asm/dsp.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arc/include/asm/dsp.h b/arch/arc/include/asm/dsp.h new file mode 100644 index 000000000000..b016f4d2a09f --- /dev/null +++ b/arch/arc/include/asm/dsp.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com) + * + * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> + */ +#ifndef __ASM_ARC_DSP_H +#define __ASM_ARC_DSP_H + +#ifndef __ASSEMBLY__ + +/* + * DSP-related saved registers - need to be saved only when you are + * scheduled out. + * structure fields name must correspond to aux register defenitions for + * automatic offset calculation in DSP_AUX_SAVE_RESTORE macros + */ +struct dsp_callee_regs { + unsigned long ACC0_GLO, ACC0_GHI, DSP_BFLY0, DSP_FFT_CTRL; +}; + +#endif /* !__ASSEMBLY__ */ + +#endif /* __ASM_ARC_DSP_H */ |