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Diffstat (limited to '')
-rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabInit.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabInit.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabInit.c new file mode 100644 index 00000000..4d50ee4c --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabInit.c @@ -0,0 +1,72 @@ +/* $Id: bs3-cmn-SlabInit.c $ */ +/** @file + * BS3Kit - Bs3SlabInit + */ + +/* + * 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 <iprt/asm.h> + + +#undef Bs3SlabInit +BS3_CMN_DEF(void, Bs3SlabInit,(PBS3SLABCTL pSlabCtl, size_t cbSlabCtl, uint32_t uFlatSlabPtr, uint32_t cbSlab, uint16_t cbChunk)) +{ + uint16_t cBits; + BS3_ASSERT(RT_IS_POWER_OF_TWO(cbChunk)); + BS3_ASSERT(cbSlab >= cbChunk * 4); + BS3_ASSERT(!(uFlatSlabPtr & (cbChunk - 1))); + + BS3_XPTR_SET_FLAT(BS3SLABCTL, pSlabCtl->pNext, 0); + BS3_XPTR_SET_FLAT(BS3SLABCTL, pSlabCtl->pHead, 0); + BS3_XPTR_SET_FLAT(BS3SLABCTL, pSlabCtl->pbStart, uFlatSlabPtr); + pSlabCtl->cbChunk = cbChunk; + pSlabCtl->cChunkShift = ASMBitFirstSetU16(cbChunk) - 1; + pSlabCtl->cChunks = cbSlab >> pSlabCtl->cChunkShift; + pSlabCtl->cFreeChunks = pSlabCtl->cChunks; + cBits = RT_ALIGN_T(pSlabCtl->cChunks, 32, uint16_t); + BS3_ASSERT(cbSlabCtl >= RT_UOFFSETOF_DYN(BS3SLABCTL, bmAllocated[cBits >> 3])); + Bs3MemZero(&pSlabCtl->bmAllocated, cBits >> 3); + + /* Mark excess bitmap padding bits as allocated. */ + if (cBits != pSlabCtl->cChunks) + { + uint16_t iBit; + for (iBit = pSlabCtl->cChunks; iBit < cBits; iBit++) + ASMBitSet(pSlabCtl->bmAllocated, iBit); + } +} + |