| 1 | /** @file
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| 2 | * innotek Portable Runtime - 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 innotek 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 | #ifndef ___iprt_param_h
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| 18 | #define ___iprt_param_h
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| 19 |
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| 20 | /** @todo Much of the PAGE_* stuff here is obsolete and highly risky to have around.
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| 21 | * As for component configs (MM_*), either we gather all in here or we move those bits away! */
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| 22 |
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| 23 | /** @defgroup grp_rt_param System Parameter Definitions
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| 24 | * @ingroup grp_rt_cdefs
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| 25 | * @{
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| 26 | */
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| 27 |
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| 28 | /* Undefine PAGE_SIZE and PAGE_SHIFT to avoid unnecessary noice when clashing
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| 29 | with system headers. Include system headers before / after iprt depending
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| 30 | on which you wish to take precedence. */
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| 31 | #undef PAGE_SIZE
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| 32 | #undef PAGE_SHIFT
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| 33 |
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| 34 | /**
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| 35 | * i386 Page size.
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| 36 | */
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| 37 | #define PAGE_SIZE 4096
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| 38 |
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| 39 | /**
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| 40 | * i386 Page shift.
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| 41 | * This is used to convert between size (in bytes) and page count.
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| 42 | */
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| 43 | #define PAGE_SHIFT 12
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| 44 |
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| 45 | /**
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| 46 | * i386 Page offset mask.
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| 47 | *
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| 48 | * 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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| 49 | * Use PAGE_BASE_MASK, PAGE_BASE_GC_MASK, PAGE_BASE_HC_MASK, PAGE_ADDRESS() or X86_PTE_PAE_PG_MASK.
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| 50 | */
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| 51 | #define PAGE_OFFSET_MASK 0xfff
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| 52 |
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| 53 | /**
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| 54 | * Page address mask for the guest context POINTERS.
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| 55 | * @remark Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
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| 56 | */
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| 57 | #define PAGE_BASE_GC_MASK (~(RTGCUINTPTR)0xfff)
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| 58 |
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| 59 | /**
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| 60 | * Page address mask for the host context POINTERS.
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| 61 | * @remark Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
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| 62 | */
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| 63 | #define PAGE_BASE_HC_MASK (~(RTHCUINTPTR)0xfff)
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| 64 |
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| 65 | /**
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| 66 | * Page address mask for the both context POINTERS.
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| 67 | *
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| 68 | * Be careful when using this since it may be a size too big!
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| 69 | * @remark Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
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| 70 | */
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| 71 | #define PAGE_BASE_MASK (~(RTUINTPTR)0xfff)
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| 72 |
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| 73 | /**
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| 74 | * Get the page aligned address of a POINTER in the CURRENT context.
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| 75 | *
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| 76 | * @returns Page aligned address (it's an uintptr_t).
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| 77 | * @param pv The address to align.
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| 78 | *
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| 79 | * @remark Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
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| 80 | */
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| 81 | #define PAGE_ADDRESS(pv) ((uintptr_t)(pv) & ~(uintptr_t)0xfff)
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| 82 |
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| 83 | #if 1 /** @todo remove this! Use X86_PAGE_* defines. */
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| 84 | /**
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| 85 | * i386 Page directory shift.
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| 86 | * This is used to convert between PDR index and virtual address.
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| 87 | * @deprecated Use X86_*.
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| 88 | */
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| 89 | #define PGDIR_SHIFT 22
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| 90 |
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| 91 | /**
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| 92 | * i386 Page table mask.
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| 93 | * This is used together with PAGE_SHIFT to get the page table
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| 94 | * index from a virtual address.
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| 95 | * @deprecated Use X86_*.
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| 96 | */
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| 97 | #define PTE_MASK 0x3ff
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| 98 |
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| 99 | /**
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| 100 | * i386 Page table and page directory entry count for the default
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| 101 | * paging mode.
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| 102 | * @deprecated Use X86_*.
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| 103 | */
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| 104 | #define PAGE_ENTRIES 1024
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| 105 |
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| 106 | /**
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| 107 | * i386 4MB Page offset mask.
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| 108 | * @deprecated Use X86_*.
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| 109 | */
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| 110 | #define PAGE_OFFSET_MASK_BIG 0x3fffff
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| 111 | #endif /* obsolete */
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| 112 |
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| 113 | /**
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| 114 | * Host max path (the reasonable value).
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| 115 | */
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| 116 | #define RTPATH_MAX (4096 + 4) /* (PATH_MAX + 1) on linux w/ some alignment */
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| 117 |
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| 118 | /** @} */
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| 119 |
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| 120 |
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| 121 | /** @} */
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| 122 |
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| 123 | #endif
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| 124 |
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