init_completion.h

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/* PROLOG END TAG zYx                                              */
#ifndef _SPU_INIT_COMPLETION_H_
#define _SPU_INIT_COMPLETION_H_

#include "sync_utils.h"
#include <spu_mfcio.h>
#include "completion.h"

/**
 * completion_init - initialize completion variable.
 * @completion: handle to effective address of completion variable.
 *
 * Description: Initialize a completion variable to false.
 */
static __inline void _init_completion(completion_ea_t completion)
{
    DECL_COMPLETION_VARS();
    u32 oldtmask, tagmask;
   
    tagid = mfc_tag_reserve();
    tagmask = 1 << (tagid & 31);

    ea64.ull = ALIGN128_EA(completion);
    offset = OFFSET128_EA_U32(completion);

    MFC_DMA(buf, ea64, size, tagid & 31, MFC_GET_CMD);
    oldtmask = spu_readch(MFC_RdTagMask);
    spu_writech(MFC_WrTagMask, tagmask);
    spu_writech(MFC_WrTagUpdate, MFC_TAG_UPDATE_ANY);
    spu_readch(MFC_RdTagStat);

    buf[offset] = 0;
    MFC_DMA(buf, ea64, size, tagid & 31, MFC_PUT_CMD);
    spu_writech(MFC_WrTagMask, tagmask);
    spu_writech(MFC_WrTagUpdate, MFC_TAG_UPDATE_ANY);
    spu_readch(MFC_RdTagStat);
    spu_writech(MFC_WrTagMask, oldtmask);
    mfc_tag_release(tagid);
}



#endif /* _SPU_INIT_COMPLETION_H_ */