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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7321e2ea0d
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>
37 lines
826 B
C
37 lines
826 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*/
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#ifndef _ASM_ARC_SWITCH_TO_H
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#define _ASM_ARC_SWITCH_TO_H
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#ifndef __ASSEMBLY__
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#include <linux/sched.h>
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#include <asm/dsp-impl.h>
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#include <asm/fpu.h>
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#ifdef CONFIG_ARC_PLAT_EZNPS
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extern void dp_save_restore(struct task_struct *p, struct task_struct *n);
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#define ARC_EZNPS_DP_PREV(p, n) dp_save_restore(p, n)
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#else
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#define ARC_EZNPS_DP_PREV(p, n)
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#endif /* !CONFIG_ARC_PLAT_EZNPS */
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struct task_struct *__switch_to(struct task_struct *p, struct task_struct *n);
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#define switch_to(prev, next, last) \
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do { \
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ARC_EZNPS_DP_PREV(prev, next); \
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dsp_save_restore(prev, next); \
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fpu_save_restore(prev, next); \
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last = __switch_to(prev, next);\
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mb(); \
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} while (0)
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#endif
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#endif
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