| 1 | /** @file
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| 2 | * IPRT - Parameter Definitions.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2006-2007 Oracle Corporation
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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 (GPL) as published by the Free Software
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| 12 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 13 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 14 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 15 | *
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| 16 | * The contents of this file may alternatively be used under the terms
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| 17 | * of the Common Development and Distribution License Version 1.0
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| 18 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 19 | * VirtualBox OSE distribution, in which case the provisions of the
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| 20 | * CDDL are applicable instead of those of the GPL.
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| 21 | *
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| 22 | * You may elect to license modified versions of this file under the
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| 23 | * terms and conditions of either the GPL or the CDDL or both.
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| 24 | */
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| 25 |
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| 26 | #ifndef ___iprt_param_h
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| 27 | #define ___iprt_param_h
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| 28 |
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| 29 | /** @todo Much of the PAGE_* stuff here is obsolete and highly risky to have around.
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| 30 | * As for component configs (MM_*), either we gather all in here or we move those bits away! */
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| 31 |
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| 32 | /** @defgroup grp_rt_param System Parameter Definitions
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| 33 | * @ingroup grp_rt_cdefs
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| 34 | * @{
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| 35 | */
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| 36 |
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| 37 | /* Undefine PAGE_SIZE and PAGE_SHIFT to avoid unnecessary noice when clashing
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| 38 | * with system headers. Include system headers before / after iprt depending
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| 39 | * on which you wish to take precedence. */
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| 40 | #undef PAGE_SIZE
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| 41 | #undef PAGE_SHIFT
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| 42 |
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| 43 | /* Undefine PAGE_OFFSET_MASK to avoid the conflict with the-linux-kernel.h */
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| 44 | #undef PAGE_OFFSET_MASK
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| 45 |
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| 46 | /**
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| 47 | * i386 Page size.
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| 48 | */
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| 49 | #define PAGE_SIZE 4096
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| 50 |
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| 51 | /**
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| 52 | * i386 Page shift.
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| 53 | * This is used to convert between size (in bytes) and page count.
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| 54 | */
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| 55 | #define PAGE_SHIFT 12
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| 56 |
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| 57 | /**
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| 58 | * i386 Page offset mask.
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| 59 | *
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| 60 | * Do NOT one-complement this for whatever purpose. You may get a 32-bit const when you want a 64-bit one.
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| 61 | * Use PAGE_BASE_MASK, PAGE_BASE_GC_MASK, PAGE_BASE_HC_MASK, PAGE_ADDRESS() or X86_PTE_PAE_PG_MASK.
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| 62 | */
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| 63 | #define PAGE_OFFSET_MASK 0xfff
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| 64 |
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| 65 | /**
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| 66 | * Page address mask for the guest context POINTERS.
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| 67 | * @remark Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
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| 68 | */
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| 69 | #define PAGE_BASE_GC_MASK (~(RTGCUINTPTR)0xfff)
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| 70 |
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| 71 | /**
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| 72 | * Page address mask for the host context POINTERS.
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| 73 | * @remark Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
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| 74 | */
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| 75 | #define PAGE_BASE_HC_MASK (~(RTHCUINTPTR)0xfff)
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| 76 |
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| 77 | /**
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| 78 | * Page address mask for the both context POINTERS.
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| 79 | *
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| 80 | * Be careful when using this since it may be a size too big!
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| 81 | * @remark Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
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| 82 | */
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| 83 | #define PAGE_BASE_MASK (~(RTUINTPTR)0xfff)
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| 84 |
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| 85 | /**
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| 86 | * Get the page aligned address of a POINTER in the CURRENT context.
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| 87 | *
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| 88 | * @returns Page aligned address (it's an uintptr_t).
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| 89 | * @param pv The virtual address to align.
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| 90 | *
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| 91 | * @remarks Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
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| 92 | * @remarks This only works with POINTERS in the current context.
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| 93 | * Do NOT use on guest address or physical address!
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| 94 | */
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| 95 | #define PAGE_ADDRESS(pv) ((uintptr_t)(pv) & ~(uintptr_t)0xfff)
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| 96 |
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| 97 | /**
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| 98 | * Get the page aligned address of a physical address
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| 99 | *
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| 100 | * @returns Page aligned address (it's an RTHCPHYS or RTGCPHYS).
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| 101 | * @param Phys The physical address to align.
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| 102 | */
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| 103 | #define PHYS_PAGE_ADDRESS(Phys) ((Phys) & X86_PTE_PAE_PG_MASK)
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| 104 |
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| 105 | /**
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| 106 | * Host max path (the reasonable value).
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| 107 | */
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| 108 | #define RTPATH_MAX (4096 + 4) /* (PATH_MAX + 1) on linux w/ some alignment */
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| 109 |
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| 110 | /** @} */
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| 111 |
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| 112 |
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| 113 | /** @} */
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| 114 |
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| 115 | #endif
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| 116 |
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