/* $Id: MMAllPagePool.cpp 12989 2008-10-06 02:15:39Z vboxsync $ */ /** @file * MM - Memory Manager - Page Pool. * * @remarks This file is NOT built for the raw-mode context. */ /* * 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; * 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. * * 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 * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_MM_POOL #include #include #include #include "MMInternal.h" #include #include #include #include #include #include #include #define USE_INLINE_ASM_BIT_OPS #ifdef USE_INLINE_ASM_BIT_OPS # include #endif /** * 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. */ VMMDECL(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; } /** * 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. */ VMMDECL(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 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; } /** * 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=%VHp specified\n", HCPhysPage)); } } return pvPage; } /** * 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=%VHp specified\n", HCPhysPage)); return VERR_INVALID_POINTER; } } *ppvPage = pvPage; return VINF_SUCCESS; } /** * 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; }