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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>
25 lines
614 B
C
25 lines
614 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
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*
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* Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
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*/
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#ifndef __ASM_ARC_DSP_H
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#define __ASM_ARC_DSP_H
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#ifndef __ASSEMBLY__
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/*
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* DSP-related saved registers - need to be saved only when you are
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* scheduled out.
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* structure fields name must correspond to aux register defenitions for
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* automatic offset calculation in DSP_AUX_SAVE_RESTORE macros
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*/
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struct dsp_callee_regs {
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unsigned long ACC0_GLO, ACC0_GHI, DSP_BFLY0, DSP_FFT_CTRL;
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};
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#endif /* !__ASSEMBLY__ */
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#endif /* __ASM_ARC_DSP_H */
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