1 /* 2 * PROJECT: ReactOS Kernel 3 * LICENSE: BSD - See COPYING.ARM in the top level directory 4 * FILE: ntoskrnl/mm/ARM3/largepag.c 5 * PURPOSE: ARM Memory Manager Large Page Support 6 * PROGRAMMERS: ReactOS Portable Systems Group 7 */ 8 9 /* INCLUDES *******************************************************************/ 10 11 #include <ntoskrnl.h> 12 #define NDEBUG 13 #include <debug.h> 14 15 #define MODULE_INVOLVED_IN_ARM3 16 #include <mm/ARM3/miarm.h> 17 18 /* GLOBALS ********************************************************************/ 19 20 LIST_ENTRY MmProcessList; 21 PMMPTE MiLargePageHyperPte; 22 ULONG MiLargePageRangeIndex; 23 MI_LARGE_PAGE_RANGES MiLargePageRanges[64]; 24 WCHAR MmLargePageDriverBuffer[512] = {0}; 25 ULONG MmLargePageDriverBufferLength = -1; 26 LIST_ENTRY MiLargePageDriverList; 27 BOOLEAN MiLargePageAllDrivers; 28 29 /* FUNCTIONS ******************************************************************/ 30 31 CODE_SEG("INIT") 32 VOID 33 NTAPI MiInitializeLargePageSupport(VOID)34MiInitializeLargePageSupport(VOID) 35 { 36 #if _MI_PAGING_LEVELS > 2 37 DPRINT1("MiInitializeLargePageSupport: PAE/x64 Not Implemented\n"); 38 //ASSERT(FALSE); 39 #else 40 /* Initialize the large-page hyperspace PTE used for initial mapping */ 41 MiLargePageHyperPte = MiReserveSystemPtes(1, SystemPteSpace); 42 ASSERT(MiLargePageHyperPte); 43 MiLargePageHyperPte->u.Long = 0; 44 45 /* Initialize the process tracking list, and insert the system process */ 46 InitializeListHead(&MmProcessList); 47 InsertTailList(&MmProcessList, &PsGetCurrentProcess()->MmProcessLinks); 48 #endif 49 } 50 51 CODE_SEG("INIT") 52 VOID 53 NTAPI MiSyncCachedRanges(VOID)54MiSyncCachedRanges(VOID) 55 { 56 ULONG i; 57 58 /* Scan every range */ 59 for (i = 0; i < MiLargePageRangeIndex; i++) 60 { 61 UNIMPLEMENTED_DBGBREAK("No support for large pages\n"); 62 } 63 } 64 65 CODE_SEG("INIT") 66 VOID 67 NTAPI MiInitializeDriverLargePageList(VOID)68MiInitializeDriverLargePageList(VOID) 69 { 70 PWCHAR p, pp; 71 72 /* Initialize the list */ 73 InitializeListHead(&MiLargePageDriverList); 74 75 /* Bail out if there's nothing */ 76 if (MmLargePageDriverBufferLength == 0xFFFFFFFF) return; 77 78 /* Loop from start to finish */ 79 p = MmLargePageDriverBuffer; 80 pp = MmLargePageDriverBuffer + (MmLargePageDriverBufferLength / sizeof(WCHAR)); 81 while (p < pp) 82 { 83 /* Skip whitespaces */ 84 if ((*p == L' ') || (*p == L'\n') || (*p == L'\r') || (*p == L'\t')) 85 { 86 /* Skip the character */ 87 p++; 88 continue; 89 } 90 91 /* A star means everything */ 92 if (*p == L'*') 93 { 94 /* No need to keep going */ 95 MiLargePageAllDrivers = TRUE; 96 break; 97 } 98 99 DPRINT1("Large page drivers not supported\n"); 100 ASSERT(FALSE); 101 } 102 } 103 104 /* EOF */ 105