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jeremybenn |
/*
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(C) Copyright IBM Corp. 2005, 2006
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of IBM nor the names of its contributors may be
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used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Author: Andreas Neukoetter (ti95neuk@de.ibm.com)
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*/
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#include <spu_intrinsics.h>
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#include <errno.h>
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#include "jsre.h"
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int
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__send_to_ppe (unsigned int signalcode, unsigned int opcode, void *data)
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{
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int newerrno;
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unsigned int combined = ( ( opcode<<24 )&0xff000000 ) | ( ( unsigned int )data & 0x00ffffff );
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__vector unsigned int stopfunc = {
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signalcode, /* stop */
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(unsigned int) combined,
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0x4020007f, /* nop */
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0x35000000 /* bi $0 */
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};
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void (*f) (void) = (void *) &stopfunc;
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asm ("sync");
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f ();
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newerrno = ((unsigned int *) data)[3];
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/*
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* Note: branchless code to conditionally set errno using
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* spu_cmpeq and spu_sel used more space than the following.
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*/
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if (newerrno)
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errno = newerrno;
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/*
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* Return the rc code stored in slot 0.
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*/
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return ((unsigned int *) data)[0];
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}
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