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/* $Id: bs3-cmn-memory.h $ */
/** @file
* BS3Kit - Internal Memory Structures, Variables and Functions.
*/
/*
* Copyright (C) 2007-2019 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.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
#ifndef BS3KIT_INCLUDED_bs3_cmn_memory_h
#define BS3KIT_INCLUDED_bs3_cmn_memory_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include "bs3kit.h"
#include <iprt/asm.h>
RT_C_DECLS_BEGIN;
typedef union BS3SLABCTLLOW
{
BS3SLABCTL Core;
uint32_t au32Alloc[(sizeof(BS3SLABCTL) + (0xA0000 / _4K / 8) ) / 4];
} BS3SLABCTLLOW;
#ifndef DOXYGEN_RUNNING
# define g_Bs3Mem4KLow BS3_DATA_NM(g_Bs3Mem4KLow)
#endif
extern BS3SLABCTLLOW g_Bs3Mem4KLow;
typedef union BS3SLABCTLUPPERTILED
{
BS3SLABCTL Core;
uint32_t au32Alloc[(sizeof(BS3SLABCTL) + ((BS3_SEL_TILED_AREA_SIZE - _1M) / _4K / 8) ) / 4];
} BS3SLABCTLUPPERTILED;
#ifndef DOXYGEN_RUNNING
# define g_Bs3Mem4KUpperTiled BS3_DATA_NM(g_Bs3Mem4KUpperTiled)
#endif
extern BS3SLABCTLUPPERTILED g_Bs3Mem4KUpperTiled;
/** The number of chunk sizes used by the slab list arrays
* (g_aBs3LowSlabLists, g_aBs3UpperTiledSlabLists, more?). */
#define BS3_MEM_SLAB_LIST_COUNT 6
#ifndef DOXYGEN_RUNNING
# define g_aiBs3SlabListsByPowerOfTwo BS3_DATA_NM(g_aiBs3SlabListsByPowerOfTwo)
# define g_acbBs3SlabLists BS3_DATA_NM(g_acbBs3SlabLists)
# define g_aBs3LowSlabLists BS3_DATA_NM(g_aBs3LowSlabLists)
# define g_aBs3UpperTiledSlabLists BS3_DATA_NM(g_aBs3UpperTiledSlabLists)
# define g_cbBs3SlabCtlSizesforLists BS3_DATA_NM(g_cbBs3SlabCtlSizesforLists)
#endif
extern uint8_t const g_aiBs3SlabListsByPowerOfTwo[12];
extern uint16_t const g_acbBs3SlabLists[BS3_MEM_SLAB_LIST_COUNT];
extern BS3SLABHEAD g_aBs3LowSlabLists[BS3_MEM_SLAB_LIST_COUNT];
extern BS3SLABHEAD g_aBs3UpperTiledSlabLists[BS3_MEM_SLAB_LIST_COUNT];
extern uint16_t const g_cbBs3SlabCtlSizesforLists[BS3_MEM_SLAB_LIST_COUNT];
/**
* Translates a allocation request size to a slab list index.
*
* @returns Slab list index if small request, UINT8_MAX if large.
* @param cbRequest The number of bytes requested.
*/
DECLINLINE(uint8_t) bs3MemSizeToSlabListIndex(size_t cbRequest)
{
if (cbRequest <= g_acbBs3SlabLists[BS3_MEM_SLAB_LIST_COUNT - 1])
{
unsigned idx = cbRequest ? ASMBitLastSetU16((uint16_t)(cbRequest - 1)) : 0;
return g_aiBs3SlabListsByPowerOfTwo[idx];
}
return UINT8_MAX;
}
RT_C_DECLS_END;
#endif /* !BS3KIT_INCLUDED_bs3_cmn_memory_h */
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