| 1 | /* $Id: OS2KPG.h,v 1.3 2001-09-27 03:04:12 bird Exp $
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| 2 | *
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| 3 | * OS/2 kernel page manager stuff.
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| 4 | *
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| 5 | * Copyright (c) 2001 knut st. osmundsen (knut.stange.osmundsen@mynd.no)
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| 6 | *
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| 7 | * Project Odin Software License can be found in LICENSE.TXT
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| 8 | *
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| 9 | */
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| 10 | #ifndef _OS2KPG_H_
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| 11 | #define _OS2KPG_H_
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| 12 |
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| 13 | /*******************************************************************************
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| 14 | * Global Variables *
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| 15 | *******************************************************************************/
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| 16 | #ifndef KKRNLLIB
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| 17 | #if defined(__IBMC__) || defined(__IBMCPP__)
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| 18 | #pragma map(PGSwapEnabled , "_PGSwapEnabled")
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| 19 | #pragma map(pgPhysPages , "_pgPhysPages")
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| 20 | #pragma map(pgPhysMax , "_pgPhysMax")
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| 21 | #pragma map(pgResidentPages , "_pgResidentPages")
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| 22 | #pragma map(pgSwappablePages , "_pgSwappablePages")
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| 23 | #pragma map(pgDiscardableInmem , "_pgDiscardableInmem")
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| 24 | #pragma map(pgDiscardablePages , "_pgDiscardablePages")
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| 25 | #pragma map(pgcPageFaults , "_pgcPageFaults")
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| 26 | #pragma map(pgcPageFaultsActive , "_pgcPageFaultsActive")
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| 27 | #else
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| 28 | #pragma PGSwapEnabled _PGSwapEnabled
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| 29 | #pragma pgPhysPages _pgPhysPages
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| 30 | #pragma pgPhysMax _pgPhysMax
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| 31 | #pragma pgResidentPages _pgResidentPages
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| 32 | #pragma pgSwappablePages _pgSwappablePages
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| 33 | #pragma pgDiscardableInmem _pgDiscardableInmem
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| 34 | #pragma pgDiscardablePages _pgDiscardablePages
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| 35 | #pragma pgcPageFaults _pgcPageFaults
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| 36 | #pragma pgcPageFaultsActive _pgcPageFaultsActive
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| 37 | #endif
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| 38 | #endif
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| 39 |
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| 40 | /**
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| 41 | * Paging enabled flag.
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| 42 | * Two states:<ul>
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| 43 | * <li> 1 - Swapping enabled.
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| 44 | * <li> 0 - Swapping disabled. </ul>
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| 45 | */
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| 46 | #ifdef KKRNLLIB
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| 47 | extern int * pPGSwapEnabled;
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| 48 | #define PGSwapEnabled (*pPGSwapEnabled)
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| 49 | #else
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| 50 | extern int PGSwapEnabled;
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| 51 | #endif
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| 52 |
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| 53 |
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| 54 | /**
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| 55 | * Count of physical pages - hope this is correct.
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| 56 | */
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| 57 | #ifdef KKRNLLIB
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| 58 | extern int * ppgPhysPages;
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| 59 | #define pgPhysPages (*ppgPhysPages)
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| 60 | #else
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| 61 | extern int pgPhysPages;
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| 62 | #endif
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| 63 |
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| 64 |
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| 65 | /**
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| 66 | * Pointer to top of physical memory (physical address).
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| 67 | */
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| 68 | #ifdef KKRNLLIB
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| 69 | extern PULONG ppgPhysMax;
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| 70 | #define pgPhysMax (*ppgPhysMax)
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| 71 | #else
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| 72 | extern ULONG pgPhysMax;
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| 73 | #endif
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| 74 |
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| 75 |
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| 76 | /**
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| 77 | * Count of resident pages.
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| 78 | */
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| 79 | #ifdef KKRNLLIB
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| 80 | extern int * ppgResidentPages;
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| 81 | #define pgResidentPages (*ppgResidentPages)
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| 82 | #else
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| 83 | extern int pgResidentPages;
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| 84 | #endif
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| 85 |
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| 86 |
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| 87 | /**
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| 88 | * Count of swappable pages which is currently present in memory.
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| 89 | */
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| 90 | #ifdef KKRNLLIB
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| 91 | extern int * ppgSwappablePages;
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| 92 | #define pgSwappablePages (*ppgSwappablePages)
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| 93 | #else
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| 94 | extern int pgSwappablePages;
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| 95 | #endif
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| 96 |
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| 97 |
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| 98 | /**
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| 99 | * Count of discardable pages which is currently present in memory.
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| 100 | */
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| 101 | #ifdef KKRNLLIB
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| 102 | extern int * ppgDiscardableInmem;
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| 103 | #define pgDiscardableInmem (*ppgDiscardableInmem)
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| 104 | #else
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| 105 | extern int pgDiscardableInmem;
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| 106 | #endif
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| 107 |
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| 108 |
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| 109 | /**
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| 110 | * Count of discardable pages allocated.
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| 111 | */
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| 112 | #ifdef KKRNLLIB
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| 113 | extern int * ppgDiscardablePages;
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| 114 | #define pgDiscardablePages (*ppgDiscardablePages)
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| 115 | #else
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| 116 | extern int pgDiscardablePages;
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| 117 | #endif
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| 118 |
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| 119 |
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| 120 | /**
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| 121 | * Count of page faults since bootup.
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| 122 | */
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| 123 | #ifdef KKRNLLIB
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| 124 | extern PULONG ppgcPageFaults;
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| 125 | #define pgcPageFaults (*ppgcPageFaults)
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| 126 | #else
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| 127 | extern ULONG pgcPageFaults;
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| 128 | #endif
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| 129 |
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| 130 |
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| 131 | /**
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| 132 | * Count of page faults currently being processed.
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| 133 | */
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| 134 | #ifdef KKRNLLIB
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| 135 | extern PULONG ppgcPageFaultsActive;
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| 136 | #define pgcPageFaultsActive (*ppgcPageFaultsActive)
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| 137 | #else
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| 138 | extern ULONG pgcPageFaultsActive;
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| 139 | #endif
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| 140 |
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| 141 |
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| 142 | /**
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| 143 | * Returns the number of bytes of physical memory available.
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| 144 | */
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| 145 | ULONG KRNLCALL PGPhysAvail(void);
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| 146 | ULONG KRNLCALL OrgPGPhysAvail(void);
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| 147 |
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| 148 |
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| 149 | /**
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| 150 | * Returns the number of pageframes currently in use.
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| 151 | */
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| 152 | ULONG KRNLCALL PGPhysPresent(void);
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| 153 | ULONG KRNLCALL OrgPGPhysPresent(void);
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| 154 |
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| 155 |
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| 156 | /**
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| 157 | * This function returns a bit vector for the dirty pages of a specified context
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| 158 | * for a specified range of pages.
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| 159 | *
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| 160 | * The dirty bits for the range are reset.
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| 161 | *
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| 162 | * @returns OS/2 return code. (NO_ERROR on success)
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| 163 | * @param ulVirtualPageNo Virtual page fram number.
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| 164 | * @param pPTDA Pointer to the context.
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| 165 | * @param cPages Number of pages. (max 32-bit due to ulDirtyBits.)
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| 166 | * @param ulDirtyBits Dirty bits.
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| 167 | * @remark VDM function... Not imported any longer.
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| 168 | */
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| 169 | /*ULONG KRNLCALL PGGetDirty(ULONG ulVirtualPageNo, PPTDA pPTDA, ULONG cPages, PULONG ulDirtyBits);*/
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| 170 | /*ULONG KRNLCALL OrgPGGetDirty(ULONG ulVirtualPageNo, PPTDA pPTDA, ULONG cPages, PULONG ulDirtyBits);*/
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| 171 |
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| 172 |
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| 173 | #endif
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| 174 |
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