+++ /dev/null
-/* -------------------------------------------------------------- */
-/* (C)Copyright 2001,2007, */
-/* International Business Machines Corporation, */
-/* Sony Computer Entertainment, Incorporated, */
-/* Toshiba Corporation, */
-/* */
-/* All Rights Reserved. */
-/* */
-/* Redistribution and use in source and binary forms, with or */
-/* without modification, are permitted provided that the */
-/* following conditions are met: */
-/* */
-/* - Redistributions of source code must retain the above copyright*/
-/* notice, this list of conditions and the following disclaimer. */
-/* */
-/* - Redistributions in binary form must reproduce the above */
-/* copyright notice, this list of conditions and the following */
-/* disclaimer in the documentation and/or other materials */
-/* provided with the distribution. */
-/* */
-/* - Neither the name of IBM Corporation nor the names of its */
-/* contributors may be used to endorse or promote products */
-/* derived from this software without specific prior written */
-/* permission. */
-/* */
-/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND */
-/* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, */
-/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
-/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
-/* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR */
-/* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
-/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT */
-/* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; */
-/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) */
-/* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN */
-/* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR */
-/* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */
-/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
-/* -------------------------------------------------------------- */
-/* PROLOG END TAG zYx */
-#ifndef _SPU_COND_INIT_H_
-#define _SPU_COND_INIT_H_
-
-#include "sync_utils.h"
-#include "cond.h"
-#include <spu_mfcio.h>
-
-
-/**
- * cond_init - initialize condition variable.
- * @cond: handle to effective address of condition variable.
- *
- *
- * Conditional Variable - is a synchronization device that allows
- * SPE and PPE threads to suspend execution and relinquish the
- * processors until some predicate on shared data is satisfied.
- * The basic operations on conditions are: signal the condition
- * (when the predicate becomes true), and wait for the condition,
- * suspending the thread execution until anoter thread signals the
- * condition
- *
- * A condition variable must always be associated with a mutex, to
- * avoid the race condition where a thread prepares to wait on a
- * condition variable and another thread signals the condition just
- * before the first thread actually waits on it.
- *
- * cond_init initializes the condition variable cond.
- *
- * cond_signal restarts one of the threads that are waiting on the
- * condition variable cond. If no threads are waiting on cond, nothing
- * happens. If several threads are waiting on cond, exactly one
- * is restarted, but it is not specified which
- *
- * cond_broadcast restarts all the threads that are waiting on the
- * condition variable cond. Nothing happens if no threads are waiting
- * on cond
- *
- * cond_wait atomically unlocks the mutex and waits for the condition
- * variable cond to be signaled. The mutex must be lock locked by
- * the calling thread on the entrance to cond_wait. Before returning
- * to the calling thread, cond_wait re-acquires mutex.
- *
- * Only one thread initializes a condition variable. Usually, the
- * PPE thread initializes a condidtion variable, however, a cond_init
- * function is provided here for completeness
- *
- * Description: Initialize a cond variable to false.
- */
-static __inline void _cond_init(cond_ea_t cond )
-{
- char _tmp[256];
- char *tmp = (char *) ALIGN(_tmp, 128);
- volatile unsigned short *buf = (volatile unsigned short *) &tmp[0];
- unsigned int size = 128, tagid;
- unsigned int offset;
- addr64 ea64;
- unsigned int oldtmask;
- unsigned int tagmask;
-
- tagid = mfc_tag_reserve();
-
- tagmask = 1 << (tagid & 31);
-
- ea64.ull = ALIGN128_EA(cond);
- offset = OFFSET128_EA_U16(cond);
-
- 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);
-
- /* this is still just one word. since buf is of type
- * short, we fit both counts into one word. */
- buf[offset] = 0;
- buf[offset+1] = 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_COND_INIT_H_ */
projects / debian / gnuradio / blobdiff