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

   1/*
   2 * Copyright (C) 2005 Mips Technologies
   3 * Author: Chris Dearman, chris@mips.com derived from fpu.h
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms of the GNU General Public License as published by the
   7 * Free Software Foundation;  either version 2 of the  License, or (at your
   8 * option) any later version.
   9 */
  10#ifndef _ASM_DSP_H
  11#define _ASM_DSP_H
  12
  13#include <asm/cpu.h>
  14#include <asm/cpu-features.h>
  15#include <asm/hazards.h>
  16#include <asm/mipsregs.h>
  17
  18#define DSP_DEFAULT     0x00000000
  19#define DSP_MASK        0x3f
  20
  21#define __enable_dsp_hazard()                                           \
  22do {                                                                    \
  23        asm("_ehb");                                                    \
  24} while (0)
  25
  26static inline void __init_dsp(void)
  27{
  28        mthi1(0);
  29        mtlo1(0);
  30        mthi2(0);
  31        mtlo2(0);
  32        mthi3(0);
  33        mtlo3(0);
  34        wrdsp(DSP_DEFAULT, DSP_MASK);
  35}
  36
  37static inline void init_dsp(void)
  38{
  39        if (cpu_has_dsp)
  40                __init_dsp();
  41}
  42
  43#define __save_dsp(tsk)                                                 \
  44do {                                                                    \
  45        tsk->thread.dsp.dspr[0] = mfhi1();                              \
  46        tsk->thread.dsp.dspr[1] = mflo1();                              \
  47        tsk->thread.dsp.dspr[2] = mfhi2();                              \
  48        tsk->thread.dsp.dspr[3] = mflo2();                              \
  49        tsk->thread.dsp.dspr[4] = mfhi3();                              \
  50        tsk->thread.dsp.dspr[5] = mflo3();                              \
  51        tsk->thread.dsp.dspcontrol = rddsp(DSP_MASK);                   \
  52} while (0)
  53
  54#define save_dsp(tsk)                                                   \
  55do {                                                                    \
  56        if (cpu_has_dsp)                                                \
  57                __save_dsp(tsk);                                        \
  58} while (0)
  59
  60#define __restore_dsp(tsk)                                              \
  61do {                                                                    \
  62        mthi1(tsk->thread.dsp.dspr[0]);                                 \
  63        mtlo1(tsk->thread.dsp.dspr[1]);                                 \
  64        mthi2(tsk->thread.dsp.dspr[2]);                                 \
  65        mtlo2(tsk->thread.dsp.dspr[3]);                                 \
  66        mthi3(tsk->thread.dsp.dspr[4]);                                 \
  67        mtlo3(tsk->thread.dsp.dspr[5]);                                 \
  68        wrdsp(tsk->thread.dsp.dspcontrol, DSP_MASK);                    \
  69} while (0)
  70
  71#define restore_dsp(tsk)                                                \
  72do {                                                                    \
  73        if (cpu_has_dsp)                                                \
  74                __restore_dsp(tsk);                                     \
  75} while (0)
  76
  77#define __get_dsp_regs(tsk)                                             \
  78({                                                                      \
  79        if (tsk == current)                                             \
  80                __save_dsp(current);                                    \
  81                                                                        \
  82        tsk->thread.dsp.dspr;                                           \
  83})
  84
  85#endif /* _ASM_DSP_H */
  86