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() \
18 do { \
19 asm("_ehb"); \
20 } while (0)
21
22 static 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
33 static inline void init_dsp(void)
34 {
35 if (cpu_has_dsp)
36 __init_dsp();
37 }
38
39 #define __save_dsp(tsk) \
40 do { \
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) \
51 do { \
52 if (cpu_has_dsp) \
53 __save_dsp(tsk); \
54 } while (0)
55
56 #define __restore_dsp(tsk) \
57 do { \
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) \
68 do { \
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 */