diff options
Diffstat (limited to 'arch/arc/include/asm/dsp-impl.h')
| -rw-r--r-- | arch/arc/include/asm/dsp-impl.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/arc/include/asm/dsp-impl.h b/arch/arc/include/asm/dsp-impl.h new file mode 100644 index 000000000000..606620383eca --- /dev/null +++ b/arch/arc/include/asm/dsp-impl.h @@ -0,0 +1,54 @@ +/* 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 */ |