dsp.h

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/*
 * Copyright (C) 2005 Mips Technologies
 * Author: Chris Dearman, [email protected] derived from fpu.h
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */
#ifndef _ASM_DSP_H
#define _ASM_DSP_H

#include <asm/cpu.h>
#include <asm/cpu-features.h>
#include <asm/hazards.h>
#include <asm/mipsregs.h>

#define DSP_DEFAULT 0x00000000
#define DSP_MASK    0x3ff

#define __enable_dsp_hazard()                       \
do {                                    \
    asm("_ehb");                            \
} while (0)

static inline void __init_dsp(void)
{
    mthi1(0);
    mtlo1(0);
    mthi2(0);
    mtlo2(0);
    mthi3(0);
    mtlo3(0);
    wrdsp(DSP_DEFAULT, DSP_MASK);
}

static inline void init_dsp(void)
{
    if (cpu_has_dsp)
        __init_dsp();
}

#define __save_dsp(tsk)                         \
do {                                    \
    tsk->thread.dsp.dspr[0] = mfhi1();              \
    tsk->thread.dsp.dspr[1] = mflo1();              \
    tsk->thread.dsp.dspr[2] = mfhi2();              \
    tsk->thread.dsp.dspr[3] = mflo2();              \
    tsk->thread.dsp.dspr[4] = mfhi3();              \
    tsk->thread.dsp.dspr[5] = mflo3();              \
    tsk->thread.dsp.dspcontrol = rddsp(DSP_MASK);           \
} while (0)

#define save_dsp(tsk)                           \
do {                                    \
    if (cpu_has_dsp)                        \
        __save_dsp(tsk);                    \
} while (0)

#define __restore_dsp(tsk)                      \
do {                                    \
    mthi1(tsk->thread.dsp.dspr[0]);                 \
    mtlo1(tsk->thread.dsp.dspr[1]);                 \
    mthi2(tsk->thread.dsp.dspr[2]);                 \
    mtlo2(tsk->thread.dsp.dspr[3]);                 \
    mthi3(tsk->thread.dsp.dspr[4]);                 \
    mtlo3(tsk->thread.dsp.dspr[5]);                 \
    wrdsp(tsk->thread.dsp.dspcontrol, DSP_MASK);            \
} while (0)

#define restore_dsp(tsk)                        \
do {                                    \
    if (cpu_has_dsp)                        \
        __restore_dsp(tsk);                 \
} while (0)

#define __get_dsp_regs(tsk)                     \
({                                  \
    if (tsk == current)                     \
        __save_dsp(current);                    \
                                    \
    tsk->thread.dsp.dspr;                       \
})

#endif /* _ASM_DSP_H */