| 1 | /** @file
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| 2 | * GMM - The Global Memory Manager.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2007 InnoTek Systemberatung GmbH
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| 7 | *
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| 8 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 9 | * available from http://www.virtualbox.org. This file is free software;
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| 10 | * you can redistribute it and/or modify it under the terms of the GNU
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| 11 | * General Public License as published by the Free Software Foundation,
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| 12 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 13 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 14 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | *
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| 16 | */
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| 17 |
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| 18 | #ifndef ___VBox_gmm_h
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| 19 | #define ___VBox_gmm_h
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| 20 |
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| 21 | #include <VBox/types.h>
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| 22 | #include <VBox/gvmm.h>
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| 23 |
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| 24 |
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| 25 | /** @defgroup grp_gmm GMM - The Global Memory Manager
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| 26 | * @{
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| 27 | */
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| 28 |
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| 29 | /** @def IN_GMM_R0
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| 30 | * Used to indicate whether we're inside the same link module as the ring 0
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| 31 | * part of the Global Memory Manager or not.
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| 32 | */
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| 33 | /** @def GMMR0DECL
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| 34 | * Ring 0 GMM export or import declaration.
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| 35 | * @param type The return type of the function declaration.
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| 36 | */
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| 37 | #ifdef IN_GMM_R0
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| 38 | # define GMMR0DECL(type) DECLEXPORT(type) VBOXCALL
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| 39 | #else
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| 40 | # define GMMR0DECL(type) DECLIMPORT(type) VBOXCALL
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| 41 | #endif
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| 42 |
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| 43 |
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| 44 | /** The chunk shift. (2^20 = 1 MB) */
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| 45 | #define GMM_CHUNK_SHIFT 20
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| 46 | /** The allocation chunk size. */
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| 47 | #define GMM_CHUNK_SIZE (1U << GMM_CHUNK_SHIFT)
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| 48 | /** The shift factor for converting a page id into a chunk id. */
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| 49 | #define GMM_CHUNKID_SHIFT (GMM_CHUNK_SHIFT - PAGE_SHIFT)
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| 50 | /** The NIL Chunk ID value. */
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| 51 | #define NIL_GMM_CHUNKID 0
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| 52 | /** The NIL Page ID value. */
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| 53 | #define NIL_GMM_PAGEID 0
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| 54 |
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| 55 |
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| 56 | /**
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| 57 | * Over-commitment policy.
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| 58 | */
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| 59 | typedef enum GMMOCPOLICY
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| 60 | {
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| 61 | /** The usual invalid 0 value. */
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| 62 | GMMOCPOLICY_INVALID = 0,
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| 63 | /** No over-commitment, fully backed.
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| 64 | * The GMM guarantees that it will be able to allocate all of the
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| 65 | * guest RAM for a VM with OC policy. */
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| 66 | GMMOCPOLICY_NO_OC,
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| 67 | /** to-be-determined. */
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| 68 | GMMOCPOLICY_TBD,
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| 69 | /** The end of the valid policy range. */
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| 70 | GMMOCPOLICY_END,
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| 71 | /** The usual 32-bit hack. */
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| 72 | GMMOCPOLICY_32BIT_HACK = 0x7fffffff
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| 73 | } GMMOCPOLICY;
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| 74 |
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| 75 | /**
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| 76 | * VM / Memory priority.
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| 77 | */
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| 78 | typedef enum GMMPRIORITY
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| 79 | {
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| 80 | /** The usual invalid 0 value. */
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| 81 | GMMPRIORITY_INVALID = 0,
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| 82 | /** High - avoid interrupting it if at all possible */
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| 83 | GMMPRIORITY_HIGH,
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| 84 | /** Normal - pause, save it or kill it. */
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| 85 | GMMPRIORITY_NORMAL,
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| 86 | /** Low - save or kill it. */
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| 87 | GMMPRIORITY_LOW,
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| 88 | /** The end of the valid priority range. */
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| 89 | GMMPRIORITY_END = 0,
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| 90 | /** The custom 32-bit type blowup. */
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| 91 | GMMPRIORITY_32BIT_HACK = 0x7fffffff
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| 92 | } GMMPRIORITY;
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| 93 |
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| 94 |
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| 95 | /** @} */
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| 96 |
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| 97 | #endif
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| 98 |
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