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/* 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_IMPL_H
#define __ASM_ARC_DSP_IMPL_H
#define DSP_CTRL_DISABLED_ALL 0
#ifdef __ASSEMBLY__
/* clobbers r5 register */
.macro DSP_EARLY_INIT
lr r5, [ARC_AUX_DSP_BUILD]
bmsk r5, r5, 7
breq r5, 0, 1f
mov r5, DSP_CTRL_DISABLED_ALL
sr r5, [ARC_AUX_DSP_CTRL]
1:
.endm
/* clobbers r10, r11 registers pair */
.macro DSP_SAVE_REGFILE_IRQ
#if defined(CONFIG_ARC_DSP_KERNEL)
/*
* Drop any changes to DSP_CTRL made by userspace so userspace won't be
* able to break kernel - reset it to DSP_CTRL_DISABLED_ALL value
*/
mov r10, DSP_CTRL_DISABLED_ALL
sr r10, [ARC_AUX_DSP_CTRL]
#endif /* ARC_DSP_KERNEL */
.endm
#else /* __ASEMBLY__ */
#include <asm/asserts.h>
static inline bool dsp_exist(void)
{
struct bcr_generic bcr;
READ_BCR(ARC_AUX_DSP_BUILD, bcr);
return !!bcr.ver;
}
static inline void dsp_config_check(void)
{
CHK_OPT_STRICT(CONFIG_ARC_DSP_HANDLED, dsp_exist());
}
#endif /* __ASEMBLY__ */
#endif /* __ASM_ARC_DSP_IMPL_H */
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