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/* $Id: MMAllPagePool.cpp $ */
/** @file
* MM - Memory Manager - Page Pool.
*
* @remarks This file is NOT built for the raw-mode context.
*/
/*
* Copyright (C) 2006-2007 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* 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.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP LOG_GROUP_MM_POOL
#include <VBox/mm.h>
#include <VBox/pgm.h>
#include <VBox/stam.h>
#include "MMInternal.h"
#include <VBox/vm.h>
#include <VBox/param.h>
#include <VBox/err.h>
#include <VBox/log.h>
#include <iprt/alloc.h>
#include <iprt/assert.h>
#include <iprt/string.h>
#define USE_INLINE_ASM_BIT_OPS
#ifdef USE_INLINE_ASM_BIT_OPS
# include <iprt/asm.h>
#endif
#ifndef VBOX_WITH_2X_4GB_ADDR_SPACE_IN_R0
/**
* Converts a pool physical address to a linear address.
* The specified allocation type must match with the address.
*
* @returns Physical address.
* @returns NULL if not found or eType is not matching.
* @param pPool Pointer to the page pool.
* @param HCPhys The address to convert.
* @thread The Emulation Thread.
*/
void *mmPagePoolPhys2Ptr(PMMPAGEPOOL pPool, RTHCPHYS HCPhys)
{
#if 0 /** @todo have to fix the debugger, but until then this is going on my nerves. */
#ifdef IN_RING3
VM_ASSERT_EMT(pPool->pVM);
#endif
#endif
/*
* Lookup the virtual address.
*/
PMMPPLOOKUPHCPHYS pLookup = (PMMPPLOOKUPHCPHYS)RTAvlHCPhysGet(&pPool->pLookupPhys, HCPhys & X86_PTE_PAE_PG_MASK);
if (pLookup)
{
STAM_COUNTER_INC(&pPool->cToVirtCalls);
PSUPPAGE pPhysPage = pLookup->pPhysPage;
PMMPAGESUBPOOL pSubPool = (PMMPAGESUBPOOL)pPhysPage->uReserved;
unsigned iPage = pPhysPage - pSubPool->paPhysPages;
return (char *)pSubPool->pvPages + (HCPhys & PAGE_OFFSET_MASK) + (iPage << PAGE_SHIFT);
}
return NULL;
}
/**
* Convert physical address of a page to a HC virtual address.
* This works for pages allocated by MMR3PageAlloc(), MMR3PageAllocPhys()
* and MMR3PageAllocLow().
*
* @returns VBox status code.
* @param pVM VM handle.
* @param HCPhysPage The physical address of a page.
* @param ppvPage Where to store the address corresponding to HCPhysPage.
* @thread The Emulation Thread.
*/
VMMDECL(int) MMPagePhys2PageEx(PVM pVM, RTHCPHYS HCPhysPage, void **ppvPage)
{
void *pvPage = mmPagePoolPhys2Ptr(pVM->mm.s.CTX_SUFF(pPagePool), HCPhysPage);
if (!pvPage)
{
pvPage = mmPagePoolPhys2Ptr(pVM->mm.s.CTX_SUFF(pPagePoolLow), HCPhysPage);
if (!pvPage)
{
STAM_COUNTER_INC(&pVM->mm.s.CTX_SUFF(pPagePool)->cErrors);
AssertMsg(pvPage, ("Invalid HCPhysPage=%RHp specified\n", HCPhysPage));
return VERR_INVALID_POINTER;
}
}
*ppvPage = pvPage;
return VINF_SUCCESS;
}
#endif /* !VBOX_WITH_2X_4GB_ADDR_SPACE_IN_R0 */
#ifdef IN_RING3
/**
* Convert physical address of a page to a HC virtual address.
* This works for pages allocated by MMR3PageAlloc(), MMR3PageAllocPhys()
* and MMR3PageAllocLow().
*
* @returns Pointer to the page at that physical address.
* @param pVM VM handle.
* @param HCPhysPage The physical address of a page.
* @thread The Emulation Thread.
*/
VMMDECL(void *) MMPagePhys2Page(PVM pVM, RTHCPHYS HCPhysPage)
{
void *pvPage = mmPagePoolPhys2Ptr(pVM->mm.s.CTX_SUFF(pPagePool), HCPhysPage);
if (!pvPage)
{
pvPage = mmPagePoolPhys2Ptr(pVM->mm.s.CTX_SUFF(pPagePoolLow), HCPhysPage);
if (!pvPage)
{
STAM_COUNTER_INC(&pVM->mm.s.CTX_SUFF(pPagePool)->cErrors);
AssertMsg(pvPage, ("Invalid HCPhysPage=%RHp specified\n", HCPhysPage));
}
}
return pvPage;
}
/**
* Try convert physical address of a page to a HC virtual address.
* This works for pages allocated by MMR3PageAlloc(), MMR3PageAllocPhys()
* and MMR3PageAllocLow().
*
* @returns VBox status code.
* @param pVM VM handle.
* @param HCPhysPage The physical address of a page.
* @param ppvPage Where to store the address corresponding to HCPhysPage.
* @thread The Emulation Thread.
*/
VMMDECL(int) MMPagePhys2PageTry(PVM pVM, RTHCPHYS HCPhysPage, void **ppvPage)
{
void *pvPage = mmPagePoolPhys2Ptr(pVM->mm.s.CTX_SUFF(pPagePool), HCPhysPage);
if (!pvPage)
{
pvPage = mmPagePoolPhys2Ptr(pVM->mm.s.CTX_SUFF(pPagePoolLow), HCPhysPage);
if (!pvPage)
return VERR_INVALID_POINTER;
}
*ppvPage = pvPage;
return VINF_SUCCESS;
}
/**
* Converts a pool address to a physical address.
* The specified allocation type must match with the address.
*
* @returns Physical address.
* @returns NIL_RTHCPHYS if not found or eType is not matching.
* @param pPool Pointer to the page pool.
* @param pv The address to convert.
* @thread The Emulation Thread.
*/
RTHCPHYS mmPagePoolPtr2Phys(PMMPAGEPOOL pPool, void *pv)
{
#ifdef IN_RING3
VM_ASSERT_EMT(pPool->pVM);
#endif
/*
* Lookup the virtual address.
*/
PMMPPLOOKUPHCPTR pLookup = (PMMPPLOOKUPHCPTR)RTAvlPVGetBestFit(&pPool->pLookupVirt, pv, false);
if (pLookup)
{
unsigned iPage = ((char *)pv - (char *)pLookup->pSubPool->pvPages) >> PAGE_SHIFT;
if (iPage < pLookup->pSubPool->cPages)
{
/*
* Convert the virtual address to a physical address.
*/
STAM_COUNTER_INC(&pPool->cToPhysCalls);
AssertMsg( pLookup->pSubPool->paPhysPages[iPage].Phys
&& !(pLookup->pSubPool->paPhysPages[iPage].Phys & PAGE_OFFSET_MASK),
("Phys=%#x\n", pLookup->pSubPool->paPhysPages[iPage].Phys));
AssertMsg((uintptr_t)pLookup->pSubPool == pLookup->pSubPool->paPhysPages[iPage].uReserved,
("pSubPool=%p uReserved=%p\n", pLookup->pSubPool, pLookup->pSubPool->paPhysPages[iPage].uReserved));
return pLookup->pSubPool->paPhysPages[iPage].Phys + ((uintptr_t)pv & PAGE_OFFSET_MASK);
}
}
return NIL_RTHCPHYS;
}
/**
* Convert a page in the page pool to a HC physical address.
* This works for pages allocated by MMR3PageAlloc(), MMR3PageAllocPhys()
* and MMR3PageAllocLow().
*
* @returns Physical address for the specified page table.
* @param pVM VM handle.
* @param pvPage Page which physical address we query.
* @thread The Emulation Thread.
*/
VMMDECL(RTHCPHYS) MMPage2Phys(PVM pVM, void *pvPage)
{
RTHCPHYS HCPhys = mmPagePoolPtr2Phys(pVM->mm.s.CTX_SUFF(pPagePool), pvPage);
if (HCPhys == NIL_RTHCPHYS)
{
HCPhys = mmPagePoolPtr2Phys(pVM->mm.s.CTX_SUFF(pPagePoolLow), pvPage);
if (HCPhys == NIL_RTHCPHYS)
{
STAM_COUNTER_INC(&pVM->mm.s.CTX_SUFF(pPagePool)->cErrors);
AssertMsgFailed(("Invalid pvPage=%p specified\n", pvPage));
}
}
return HCPhys;
}
#endif /* IN_RING3 */
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