1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (C) 2005 Mips Technologies
4 * Author: Chris Dearman, chris@mips.com derived from fpu.h
5 */
6#ifndef _ASM_DSP_H
7#define _ASM_DSP_H
8
9#include <asm/cpu.h>
10#include <asm/cpu-features.h>
11#include <asm/hazards.h>
12#include <asm/mipsregs.h>
13
14#define DSP_DEFAULT	0x00000000
15#define DSP_MASK	0x3f
16
17#define __enable_dsp_hazard()						\
18do {									\
19	asm("_ehb");							\
20} while (0)
21
22static inline void __init_dsp(void)
23{
24	mthi1(0);
25	mtlo1(0);
26	mthi2(0);
27	mtlo2(0);
28	mthi3(0);
29	mtlo3(0);
30	wrdsp(DSP_DEFAULT, DSP_MASK);
31}
32
33static inline void init_dsp(void)
34{
35	if (cpu_has_dsp)
36		__init_dsp();
37}
38
39#define __save_dsp(tsk)							\
40do {									\
41	tsk->thread.dsp.dspr[0] = mfhi1();				\
42	tsk->thread.dsp.dspr[1] = mflo1();				\
43	tsk->thread.dsp.dspr[2] = mfhi2();				\
44	tsk->thread.dsp.dspr[3] = mflo2();				\
45	tsk->thread.dsp.dspr[4] = mfhi3();				\
46	tsk->thread.dsp.dspr[5] = mflo3();				\
47	tsk->thread.dsp.dspcontrol = rddsp(DSP_MASK);			\
48} while (0)
49
50#define save_dsp(tsk)							\
51do {									\
52	if (cpu_has_dsp)						\
53		__save_dsp(tsk);					\
54} while (0)
55
56#define __restore_dsp(tsk)						\
57do {									\
58	mthi1(tsk->thread.dsp.dspr[0]);					\
59	mtlo1(tsk->thread.dsp.dspr[1]);					\
60	mthi2(tsk->thread.dsp.dspr[2]);					\
61	mtlo2(tsk->thread.dsp.dspr[3]);					\
62	mthi3(tsk->thread.dsp.dspr[4]);					\
63	mtlo3(tsk->thread.dsp.dspr[5]);					\
64	wrdsp(tsk->thread.dsp.dspcontrol, DSP_MASK);			\
65} while (0)
66
67#define restore_dsp(tsk)						\
68do {									\
69	if (cpu_has_dsp)						\
70		__restore_dsp(tsk);					\
71} while (0)
72
73#define __get_dsp_regs(tsk)						\
74({									\
75	if (tsk == current)						\
76		__save_dsp(current);					\
77									\
78	tsk->thread.dsp.dspr;						\
79})
80
81#endif /* _ASM_DSP_H */
82