windows-nt/Source/XPSP1/NT/base/ntos/mm/i386/data386.c

/*++

Copyright (c) 1990  Microsoft Corporation

Module Name:

   data386.c

Abstract:

    This module contains the private hardware specific global storage for
    the memory management subsystem.

Author:

    Lou Perazzoli (loup) 22-Jan-1990

Revision History:

--*/

#include "mi.h"

//
// A zero Pte.
//

const MMPTE ZeroPte = { 0 };

//
// A kernel zero PTE.
//

const MMPTE ZeroKernelPte = {0x0};

MMPTE MmPteGlobal = {0x0}; // Set global bit later if processor supports Global Page

//
// Note - MM_PTE_GLOBAL_MASK is or'ed into ValidKernelPte during
// initialization if the processor supports Global Page.  Use
// ValidKernelPteLocal if you don't want the global bit (ie: for session
// space).
//

MMPTE ValidKernelPte = { MM_PTE_VALID_MASK |
                         MM_PTE_WRITE_MASK |
                         MM_PTE_DIRTY_MASK |
                         MM_PTE_ACCESS_MASK };

const MMPTE ValidKernelPteLocal = { MM_PTE_VALID_MASK |
                                    MM_PTE_WRITE_MASK |
                                    MM_PTE_DIRTY_MASK |
                                    MM_PTE_ACCESS_MASK };


const MMPTE ValidUserPte = { MM_PTE_VALID_MASK |
                             MM_PTE_WRITE_MASK |
                             MM_PTE_OWNER_MASK |
                             MM_PTE_DIRTY_MASK |
                             MM_PTE_ACCESS_MASK };


const MMPTE ValidPtePte = { MM_PTE_VALID_MASK |
                            MM_PTE_WRITE_MASK |
                            MM_PTE_DIRTY_MASK |
                            MM_PTE_ACCESS_MASK };


const MMPTE ValidPdePde = { MM_PTE_VALID_MASK |
                            MM_PTE_WRITE_MASK |
                            MM_PTE_DIRTY_MASK |
                            MM_PTE_ACCESS_MASK };


MMPTE ValidKernelPde = { MM_PTE_VALID_MASK |
                         MM_PTE_WRITE_MASK |
                         MM_PTE_DIRTY_MASK |
                         MM_PTE_ACCESS_MASK };

const MMPTE ValidKernelPdeLocal = { MM_PTE_VALID_MASK |
                                    MM_PTE_WRITE_MASK |
                                    MM_PTE_DIRTY_MASK |
                                    MM_PTE_ACCESS_MASK };

// NOTE - MM_PTE_GLOBAL_MASK  or'ed in later if processor supports Global Page


MMPTE DemandZeroPde = { MM_READWRITE << 5 };


const MMPTE DemandZeroPte = { MM_READWRITE << 5 };


const MMPTE TransitionPde = { MM_PTE_WRITE_MASK |
                              MM_PTE_OWNER_MASK |
                              MM_PTE_TRANSITION_MASK |
                              MM_READWRITE << 5 };

#if !defined (_X86PAE_)
MMPTE PrototypePte = { 0xFFFFF000 |
                       MM_PTE_PROTOTYPE_MASK |
                       MM_READWRITE << 5 };
#else
MMPTE PrototypePte = { (MI_PTE_LOOKUP_NEEDED << 32) |
                       MM_PTE_PROTOTYPE_MASK |
                       MM_READWRITE << 5 };
#endif


//
// PTE which generates an access violation when referenced.
//

const MMPTE NoAccessPte = {MM_NOACCESS << 5};

//
// Pool start and end.
//

PVOID MmNonPagedPoolStart;

PVOID MmNonPagedPoolEnd = (PVOID) MM_NONPAGED_POOL_END;

PVOID MmPagedPoolStart = (PVOID) MM_DEFAULT_PAGED_POOL_START;

PVOID MmPagedPoolEnd;

PMMWSL MmWorkingSetList;

ULONG MiMaximumWorkingSet =
       ((ULONG)((ULONG)2*1024*1024*1024 - 64*1024*1024) >> PAGE_SHIFT); //2Gb-64Mb

//
// Color tables for free and zeroed pages.
//

PMMCOLOR_TABLES MmFreePagesByColor[2];

//
// Color tables for modified pages destined for the paging file.
//

MMPFNLIST MmModifiedPageListByColor[MM_MAXIMUM_NUMBER_OF_COLORS] = {
                            0, ModifiedPageList, MM_EMPTY_LIST, MM_EMPTY_LIST};


//
// Count of the number of modified pages destined for the paging file.
//

ULONG MmTotalPagesForPagingFile = 0;

//
// Pte reserved for mapping pages for the debugger.
//

PMMPTE MmDebugPte = (MiGetPteAddress(MM_DEBUG_VA));

//
// 16 PTEs reserved for mapping MDLs (64k max).
//

PMMPTE MmCrashDumpPte = (MiGetPteAddress(MM_CRASH_DUMP_VA));

//
// Number of additional system PTEs present.
//

ULONG MiNumberOfExtraSystemPdes;
ULONG MiMaximumSystemExtraSystemPdes;

ULONG_PTR MiUseMaximumSystemSpace;
ULONG_PTR MiUseMaximumSystemSpaceEnd;

//
// Size of extended system cache.
//

ULONG MiMaximumSystemCacheSizeExtra;

PVOID MiSystemCacheStartExtra;

PVOID MiSystemCacheEndExtra;

ULONG MiExtraResourceStart;

ULONG MiExtraResourceEnd;

ULONG_PTR MmBootImageSize;