viswapbuf.c
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/*====================================================================
* viswapbuf.c
*
* Copyright 1995, Silicon Graphics, Inc.
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
* Inc.; the contents of this file may not be disclosed to third
* parties, copied or duplicated in any form, in whole or in part,
* without the prior written permission of Silicon Graphics, Inc.
*
* RESTRICTED RIGHTS LEGEND:
* Use, duplication or disclosure by the Government is subject to
* restrictions as set forth in subdivision (c)(1)(ii) of the Rights
* in Technical Data and Computer Software clause at DFARS
* 252.227-7013, and/or in similar or successor clauses in the FAR,
* DOD or NASA FAR Supplement. Unpublished - rights reserved under the
* Copyright Laws of the United States.
*====================================================================*/
/**************************************************************************
*
* $Revision: 1.1.1.2 $
* $Date: 2002/10/29 08:06:43 $
* $Source: /root/leakn64/depot/rf/sw/n64os20l/libultra/monegi/vi/viswapbuf.c,v $
*
**************************************************************************/
#include "osint.h"
#include "rcp.h"
#include "viint.h"
#include "assert.h"
/*
* Name: osViSwapBuffer
*
* Description:
* Register the frame buffer to be displayed at the next vertical retrace
* interrupt.
*
* Globals Referenced:
* __osViNext
*/
void
osViSwapBuffer(void *frameBufPtr)
{
u32 saveMask;
#ifdef _DEBUG
/* Check that VI manager is running */
if (!__osViDevMgr.active) {
__osError(ERR_OSVISWAPBUFFER_VIMGR, 0);
return;
}
/*
* Check for empty frame buffer pointer and
*/
assert(frameBufPtr != NULL);
/*
* Check that frame buffer pointer is 64 byte aligned
*/
if ((u32)frameBufPtr & 0x3f) {
__osError(ERR_OSVISWAPBUFFER_ADDR, 1, frameBufPtr);
return;
}
#endif
saveMask = __osDisableInt();
__osViNext->framep = frameBufPtr;
__osViNext->state |= VI_STATE_FRAME;
__osRestoreInt(saveMask);
} /* osViSwapBuffer */