alloc-r0drv-nt.cpp revision e5957bc6356cd40706e411eefb4fea6ecb7084e0
/* $Id$ */
/** @file
* IPRT - Memory Allocation, Ring-0 Driver, NT.
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "the-nt-kernel.h"
#include "r0drv/alloc-r0drv.h"
/**
* OS specific allocation function.
*/
{
PRTMEMHDR pHdr = (PRTMEMHDR)ExAllocatePoolWithTag(NonPagedPool, cb + sizeof(*pHdr), IPRT_NT_POOL_TAG);
if (pHdr)
{
}
return pHdr;
}
/**
* OS specific free function.
*/
{
}
/**
* Allocates physical contiguous memory (below 4GB).
* The allocation is page aligned and its contents is undefined.
*
* @returns Pointer to the memory block. This is page aligned.
* @param pPhys Where to store the physical address.
* @param cb The allocation size in bytes. This is always
* rounded up to PAGE_SIZE.
*/
{
/*
* validate input.
*/
/*
* Allocate and get physical address.
* Make sure the return is page aligned.
*/
MaxPhysAddr.HighPart = 0;
if (pv)
{
{
{
return pv;
}
/* failure */
AssertMsgFailed(("MMAllocContiguousMemory returned high address! PhysAddr=%RX64\n", (uint64_t)PhysAddr.QuadPart));
}
else
}
return NULL;
}
/**
* Frees memory allocated ysing RTMemContAlloc().
*
* @param pv Pointer to return from RTMemContAlloc().
* @param cb The cb parameter passed to RTMemContAlloc().
*/
{
if (pv)
{
}
}