LXR linux/arch/mips/include/asm/dsp.h

   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