projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| e50c0a8f RB |
2 | /* |
| 3 | * Copyright (C) 2005 Mips Technologies | |
| 4 | * Author: Chris Dearman, chris@mips.com derived from fpu.h | |
| e50c0a8f RB |
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 | |
| 6829aeae | 15 | #define DSP_MASK 0x3f |
| e50c0a8f RB |
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(); \ | |
| 07a801de | 47 | tsk->thread.dsp.dspcontrol = rddsp(DSP_MASK); \ |
| e50c0a8f RB |
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]); \ | |
| 07a801de | 64 | wrdsp(tsk->thread.dsp.dspcontrol, DSP_MASK); \ |
| e50c0a8f RB |
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 */ |