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104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: ntoskrnl/mm/ARM3/largepag.c
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* PURPOSE: ARM Memory Manager Large Page Support
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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/* INCLUDES *******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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#define MODULE_INVOLVED_IN_ARM3
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#include <mm/ARM3/miarm.h>
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/* GLOBALS ********************************************************************/
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LIST_ENTRY MmProcessList;
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PMMPTE MiLargePageHyperPte;
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ULONG MiLargePageRangeIndex;
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MI_LARGE_PAGE_RANGES MiLargePageRanges[64];
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WCHAR MmLargePageDriverBuffer[512] = {0};
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ULONG MmLargePageDriverBufferLength = -1;
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LIST_ENTRY MiLargePageDriverList;
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BOOLEAN MiLargePageAllDrivers;
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/* FUNCTIONS ******************************************************************/
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VOID
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NTAPI
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INIT_FUNCTION
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MiInitializeLargePageSupport(VOID)
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{
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#if _MI_PAGING_LEVELS > 2
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DPRINT1("MiInitializeLargePageSupport: PAE/x64 Not Implemented\n");
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//ASSERT(FALSE);
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#else
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/* Initialize the large-page hyperspace PTE used for initial mapping */
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MiLargePageHyperPte = MiReserveSystemPtes(1, SystemPteSpace);
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ASSERT(MiLargePageHyperPte);
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MiLargePageHyperPte->u.Long = 0;
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/* Initialize the process tracking list, and insert the system process */
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InitializeListHead(&MmProcessList);
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InsertTailList(&MmProcessList, &PsGetCurrentProcess()->MmProcessLinks);
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#endif
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}
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VOID
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NTAPI
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INIT_FUNCTION
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MiSyncCachedRanges(VOID)
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{
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ULONG i;
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/* Scan every range */
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for (i = 0; i < MiLargePageRangeIndex; i++)
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{
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UNIMPLEMENTED_DBGBREAK("No support for large pages\n");
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}
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}
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VOID
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NTAPI
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INIT_FUNCTION
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MiInitializeDriverLargePageList(VOID)
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{
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PWCHAR p, pp;
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/* Initialize the list */
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InitializeListHead(&MiLargePageDriverList);
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/* Bail out if there's nothing */
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if (MmLargePageDriverBufferLength == 0xFFFFFFFF) return;
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/* Loop from start to finish */
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p = MmLargePageDriverBuffer;
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pp = MmLargePageDriverBuffer + (MmLargePageDriverBufferLength / sizeof(WCHAR));
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while (p < pp)
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{
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/* Skip whitespaces */
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if ((*p == L' ') || (*p == L'\n') || (*p == L'\r') || (*p == L'\t'))
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{
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/* Skip the character */
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p++;
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continue;
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}
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/* A star means everything */
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if (*p == L'*')
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{
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/* No need to keep going */
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MiLargePageAllDrivers = TRUE;
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break;
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}
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DPRINT1("Large page drivers not supported\n");
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ASSERT(FALSE);
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}
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}
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/* EOF */
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