reactos/boot/environ/lib/mm/i386/mmx86.c

   1 /*
   2 * COPYRIGHT:       See COPYING.ARM in the top level directory
   3 * PROJECT:         ReactOS UEFI Boot Library
   4 * FILE:            boot/environ/lib/mm/i386/mmx86.c
   5 * PURPOSE:         Boot Library Memory Manager x86-Specific Code
   6 * PROGRAMMER:      Alex Ionescu (alex.ionescu@reactos.org)
   7 */
   8
   9 /* INCLUDES ******************************************************************/
  10
  11 #include "bl.h"
  12
  13 /* DATA VARIABLES ************************************************************/
  14
  15 ULONG_PTR MmArchKsegBase;
  16 ULONG_PTR MmArchKsegBias;
  17 ULONG MmArchLargePageSize;
  18 BL_ADDRESS_RANGE MmArchKsegAddressRange;
  19 ULONG_PTR MmArchTopOfApplicationAddressSpace;
  20 ULONG_PTR Mmx86SelfMapBase;
  21
  22 typedef VOID
  23 (*PBL_MM_FLUSH_TLB) (
  24     VOID
  25     );
  26
  27 typedef VOID
  28 (*PBL_MM_RELOCATE_SELF_MAP) (
  29     VOID
  30     );
  31
  32 PBL_MM_RELOCATE_SELF_MAP BlMmRelocateSelfMap;
  33 PBL_MM_FLUSH_TLB BlMmFlushTlb;
  34
  35 ULONG MmDeferredMappingCount;
  36
  37 /* FUNCTIONS *****************************************************************/
  38
  39 VOID
  40 MmArchNullFunction (
  41     VOID
  42     )
  43 {
  44     /* Nothing to do */
  45     return;
  46 }
  47
  48 NTSTATUS
  49 Mmx86pMapMemoryRegions (
  50     _In_ ULONG Phase,
  51     _In_ PBL_MEMORY_DATA MemoryData
  52     )
  53 {
  54     BOOLEAN DoDeferred;
  55
  56     /* In phase 1 we don't initialize deferred mappings*/
  57     if (Phase == 1)
  58     {
  59         DoDeferred = 0;
  60     }
  61     else
  62     {
  63         /* Don't do anything if there's nothing to initialize */
  64         if (!MmDeferredMappingCount)
  65         {
  66             return STATUS_SUCCESS;
  67         }
  68
  69         DoDeferred = 1;
  70     }
  71
  72     if (DoDeferred)
  73     {
  74         EfiPrintf(L"Deferred todo\r\n");
  75     }
  76
  77     EfiPrintf(L"Phase 1 TODO\r\n");
  78     return STATUS_NOT_IMPLEMENTED;
  79 }
  80
  81 NTSTATUS
  82 MmArchInitialize (
  83     _In_ ULONG Phase,
  84     _In_ PBL_MEMORY_DATA MemoryData,
  85     _In_ BL_TRANSLATION_TYPE TranslationType,
  86     _In_ BL_TRANSLATION_TYPE RequestedTranslationType
  87     )
  88 {
  89     NTSTATUS Status;
  90
  91     /* For phase 2, just map deferred regions */
  92     if (Phase != 1)
  93     {
  94         return Mmx86pMapMemoryRegions(2, MemoryData);
  95     }
  96
  97     /* What translation type are we switching to? */
  98     switch (RequestedTranslationType)
  99     {
 100         /* Physical memory */
 101         case BlNone:
 102
 103             /* Initialize everything to default/null values */
 104             MmArchLargePageSize = 1;
 105             MmArchKsegBase = 0;
 106             MmArchKsegBias = 0;
 107             MmArchKsegAddressRange.Minimum = 0;
 108             MmArchKsegAddressRange.Maximum = (ULONGLONG)~0;
 109             MmArchTopOfApplicationAddressSpace = 0;
 110             Mmx86SelfMapBase = 0;
 111
 112             /* Set stub functions */
 113             BlMmRelocateSelfMap = MmArchNullFunction;
 114             BlMmFlushTlb = MmArchNullFunction;
 115
 116             /* Set success */
 117             Status = STATUS_SUCCESS;
 118             break;
 119
 120         case BlVirtual:
 121
 122             Status = STATUS_NOT_IMPLEMENTED;
 123             break;
 124
 125         case BlPae:
 126
 127             Status = STATUS_NOT_SUPPORTED;
 128             break;
 129
 130         default:
 131             Status = STATUS_INVALID_PARAMETER;
 132             break;
 133     }
 134
 135     return Status;
 136
 137 }