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/* $Id$ */
/** @file
* IPRT - Memory Allocation, Ring-0 Driver, NT.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "the-nt-kernel.h"
#include "internal/iprt.h"
#include <iprt/mem.h>
#include <iprt/assert.h>
#include <iprt/errcore.h>
#include "r0drv/alloc-r0drv.h"
#include "internal-r0drv-nt.h"
/**
* OS specific allocation function.
*/
DECLHIDDEN(int) rtR0MemAllocEx(size_t cb, uint32_t fFlags, PRTMEMHDR *ppHdr)
{
if (!(fFlags & RTMEMHDR_FLAG_ANY_CTX))
{
PRTMEMHDR pHdr;
POOL_TYPE const enmPoolType = g_uRtNtVersion >= RTNT_MAKE_VERSION(8,0) ? NonPagedPoolNx : NonPagedPool;
if (g_pfnrtExAllocatePoolWithTag)
pHdr = (PRTMEMHDR)g_pfnrtExAllocatePoolWithTag(enmPoolType, cb + sizeof(*pHdr), IPRT_NT_POOL_TAG);
else
{
fFlags |= RTMEMHDR_FLAG_UNTAGGED;
pHdr = (PRTMEMHDR)ExAllocatePool(enmPoolType, cb + sizeof(*pHdr));
}
if (RT_LIKELY(pHdr))
{
pHdr->u32Magic = RTMEMHDR_MAGIC;
pHdr->fFlags = fFlags;
pHdr->cb = (uint32_t)cb; Assert(pHdr->cb == cb);
pHdr->cbReq = (uint32_t)cb;
*ppHdr = pHdr;
return VINF_SUCCESS;
}
return VERR_NO_MEMORY;
}
return VERR_NOT_SUPPORTED;
}
/**
* OS specific free function.
*/
DECLHIDDEN(void) rtR0MemFree(PRTMEMHDR pHdr)
{
pHdr->u32Magic = RTMEMHDR_MAGIC_DEAD;
if (g_pfnrtExFreePoolWithTag && !(pHdr->fFlags & RTMEMHDR_FLAG_UNTAGGED))
g_pfnrtExFreePoolWithTag(pHdr, IPRT_NT_POOL_TAG);
else
ExFreePool(pHdr);
}
RTR0DECL(void *) RTMemContAlloc(PRTCCPHYS pPhys, size_t cb)
{
/*
* validate input.
*/
AssertPtr(pPhys);
Assert(cb > 0);
/*
* Allocate and get physical address.
* Make sure the return is page aligned.
*/
PHYSICAL_ADDRESS MaxPhysAddr;
MaxPhysAddr.HighPart = 0;
MaxPhysAddr.LowPart = 0xffffffff;
cb = RT_ALIGN_Z(cb, PAGE_SIZE);
void *pv = MmAllocateContiguousMemory(cb, MaxPhysAddr);
if (pv)
{
if (!((uintptr_t)pv & PAGE_OFFSET_MASK)) /* paranoia */
{
PHYSICAL_ADDRESS PhysAddr = MmGetPhysicalAddress(pv);
if (!PhysAddr.HighPart) /* paranoia */
{
*pPhys = (RTCCPHYS)PhysAddr.LowPart;
return pv;
}
/* failure */
AssertMsgFailed(("MMAllocContiguousMemory returned high address! PhysAddr=%RX64\n", (uint64_t)PhysAddr.QuadPart));
}
else
AssertMsgFailed(("MMAllocContiguousMemory didn't return a page aligned address - %p!\n", pv));
MmFreeContiguousMemory(pv);
}
return NULL;
}
RTR0DECL(void) RTMemContFree(void *pv, size_t cb)
{
if (pv)
{
Assert(cb > 0); NOREF(cb);
AssertMsg(!((uintptr_t)pv & PAGE_OFFSET_MASK), ("pv=%p\n", pv));
MmFreeContiguousMemory(pv);
}
}
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