memory.cpp

Lido PXA270平台开发板的最新BSP,包括源代码

/***************************************************************************
 * Name        : memory.cpp
 * Title       : MBX WinCE driver GPE class
 * Author(s)   : Imagination Technologies
 * Created	   : 6th January 2003
 *
 * Copyright   : 2003 by Imagination Technologies. All rights reserved.
 *             : No part of this software, either material or conceptual 
 *             : may be copied or distributed, transmitted, transcribed,
 *             : stored in a retrieval system or translated into any 
 *             : human or computer language in any form by any means,
 *             : electronic, mechanical, manual or other-wise, or 
 *             : disclosed to third parties without the express written
 *             : permission of Imagination Technologies Limited, Unit 8,
 *             : HomePark Industrial Estate, King's Langley, Hertfordshire,
 *             : WD4 8LZ, U.K.
 *
 * Description : MBX WinCE driver GPE class.
 *
 * Platform    : WinCE
 *
 * Modifications:-
 * $Log: memory.cpp $
 *
 *  --- Revision Logs Removed --- 
 *
 *  --- Revision Logs Removed --- 
 *
 *  --- Revision Logs Removed --- 
 *
 *  --- Revision Logs Removed --- 
 *
 ****************************************************************************/

#include	"precomp.h"


/*****************************************************************************
 FUNCTION	: 	VideoAlloc
 PURPOSE	:	This function allocates video memory. It does so by locating
				a free node of the appropriate size and turning it into an
				allocated node. It will split the remaining piece of the free
				node into a new free node.
 PARAMETERS	: 	
 RETURNS	: 	
*****************************************************************************/
LPVOID MBX::VideoAlloc( ULONG ulBytes, ULONG ulAlignment, ULONG *pui32PhysAddr )
{
	//////////DPFENTER((L"->VideoAlloc"));

	if (ulAlignment == 0)
	{
		ulAlignment = 1;
	}

	// Attempt to allocate from FB memory, internal or external
	MemNode *pclNode = new MemNode (ulBytes,
									&m_sDevData,
									ulAlignment,
									FBALLOC_STRATEGY_INTN | FBALLOC_STRATEGY_EXTN);
	if (pclNode)
	{
		m_cl2DMemNodes.AddToDevMemList(pclNode);

		/////DPFEXIT((L"<-VideoAlloc, success"));
		*pui32PhysAddr = pclNode->m_psDevMemHandle->uiDevAddr.uiAddr;
		return (pclNode->m_psDevMemHandle->pvLinAddr);
	}

	/////DPFEXIT((L"<-VideoAlloc, failure"));
	return (NULL);
}


/*****************************************************************************
 FUNCTION	: 	VideoFree
 PURPOSE	:	This function frees video memory allocations made with VideoAlloc.
 PARAMETERS	: 	
 RETURNS	: 	
*****************************************************************************/
VOID MBX::VideoFree( LPVOID pMem )
{
	MemNode *pclNode;

	//////////DPFENTER((L"->VideoFree"));

	pclNode = m_cl2DMemNodes.FindInDevMemList (pMem);

	if (pclNode)
	{
		delete pclNode;
	}
	else
	{
		DPFX(PVR_ZONE_MEMORY, (L"VideoFree: already freed\n"));
	}

	/////DPFEXIT((L"<-VideoFree"));
}


/********************************** end of file ******************************/