diff options
Diffstat (limited to 'src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-MemAlloc.c')
| -rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-MemAlloc.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-MemAlloc.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-MemAlloc.c new file mode 100644 index 00000000..851ddc26 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-MemAlloc.c @@ -0,0 +1,111 @@ +/* $Id: bs3-cmn-MemAlloc.c $ */ +/** @file + * BS3Kit - Bs3MemAlloc + */ + +/* + * Copyright (C) 2007-2023 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 "bs3kit-template-header.h" +#include "bs3-cmn-memory.h" +#include <iprt/asm.h> + + +#undef Bs3MemAlloc +BS3_CMN_DEF(void BS3_FAR *, Bs3MemAlloc,(BS3MEMKIND enmKind, size_t cb)) +{ + void BS3_FAR *pvRet; + uint8_t idxSlabList; + +#if ARCH_BITS == 16 + /* Don't try allocate memory which address we cannot return. */ + if ( enmKind != BS3MEMKIND_REAL + && BS3_MODE_IS_RM_OR_V86(g_bBs3CurrentMode)) + enmKind = BS3MEMKIND_REAL; +#endif + + idxSlabList = bs3MemSizeToSlabListIndex(cb); + if (idxSlabList < BS3_MEM_SLAB_LIST_COUNT) + { + /* + * Try allocate a chunk from the list. + */ + PBS3SLABHEAD pHead = enmKind == BS3MEMKIND_REAL + ? &g_aBs3LowSlabLists[idxSlabList] + : &g_aBs3UpperTiledSlabLists[idxSlabList]; + + BS3_ASSERT(g_aBs3LowSlabLists[idxSlabList].cbChunk >= cb); + pvRet = Bs3SlabListAlloc(pHead); + if (pvRet) + { /* likely */ } + else + { + /* + * Grow the list. + */ + PBS3SLABCTL pNew = (PBS3SLABCTL)Bs3SlabAlloc( enmKind == BS3MEMKIND_REAL + ? &g_Bs3Mem4KLow.Core + : &g_Bs3Mem4KUpperTiled.Core); + BS3_ASSERT(((uintptr_t)pNew & 0xfff) == 0); + if (pNew) + { + uint16_t const cbHdr = g_cbBs3SlabCtlSizesforLists[idxSlabList]; + BS3_XPTR_AUTO(void, pvNew); + BS3_XPTR_SET(void, pvNew, pNew); + + Bs3SlabInit(pNew, cbHdr, BS3_XPTR_GET_FLAT(void, pvNew) + cbHdr, _4K - cbHdr, pHead->cbChunk); + Bs3SlabListAdd(pHead, pNew); + + pvRet = Bs3SlabListAlloc(pHead); + } + } + } + else + { + /* + * Allocate one or more pages. + */ + size_t const cbAligned = RT_ALIGN_Z(cb, _4K); + uint16_t const cPages = cbAligned >> 12 /* div _4K */; + PBS3SLABCTL pSlabCtl = enmKind == BS3MEMKIND_REAL + ? &g_Bs3Mem4KLow.Core : &g_Bs3Mem4KUpperTiled.Core; + + pvRet = Bs3SlabAllocEx(pSlabCtl, + cPages, + cPages <= _64K / _4K ? BS3_SLAB_ALLOC_F_SAME_TILE : 0); + } + return pvRet; +} + |