boot/freeldr/freeldr/ntldr/conversion.c

   1 /*
   2  * PROJECT:         EFI Windows Loader
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            boot/freeldr/freeldr/windows/conversion.c
   5  * PURPOSE:         Physical <-> Virtual addressing mode conversions
   6  * PROGRAMMERS:     Aleksey Bragin (aleksey@reactos.org)
   7  */
   8
   9 /* INCLUDES ***************************************************************/
  10
  11 #include <freeldr.h>
  12
  13 //#include <ndk/ldrtypes.h>
  14 #include <debug.h>
  15
  16 DBG_DEFAULT_CHANNEL(WINDOWS);
  17
  18 /* FUNCTIONS **************************************************************/
  19
  20 VOID
  21 List_PaToVa(_In_ PLIST_ENTRY ListHeadPa)
  22 {
  23     PLIST_ENTRY EntryPa, NextPa;
  24
  25     /* List must be properly initialized */
  26     ASSERT(ListHeadPa->Flink != 0);
  27     ASSERT(ListHeadPa->Blink != 0);
  28
  29     /* Loop the list in physical address space */
  30     EntryPa = ListHeadPa->Flink;
  31     while (EntryPa != ListHeadPa)
  32     {
  33         /* Save the physical address of the next entry */
  34         NextPa = EntryPa->Flink;
  35
  36         /* Convert the addresses of this entry */
  37         EntryPa->Flink = PaToVa(EntryPa->Flink);
  38         EntryPa->Blink = PaToVa(EntryPa->Blink);
  39
  40         /* Go to the next entry */
  41         EntryPa = NextPa;
  42     }
  43
  44     /* Finally convert the list head */
  45     ListHeadPa->Flink = PaToVa(ListHeadPa->Flink);
  46     ListHeadPa->Blink = PaToVa(ListHeadPa->Blink);
  47 }
  48
  49 // This function converts only Child->Child, and calls itself for each Sibling
  50 VOID
  51 ConvertConfigToVA(PCONFIGURATION_COMPONENT_DATA Start)
  52 {
  53     PCONFIGURATION_COMPONENT_DATA Child;
  54     PCONFIGURATION_COMPONENT_DATA Sibling;
  55
  56     TRACE("ConvertConfigToVA(Start 0x%X)\n", Start);
  57     Child = Start;
  58
  59     while (Child != NULL)
  60     {
  61         if (Child->ConfigurationData)
  62             Child->ConfigurationData = PaToVa(Child->ConfigurationData);
  63
  64         if (Child->Child)
  65             Child->Child = PaToVa(Child->Child);
  66
  67         if (Child->Parent)
  68             Child->Parent = PaToVa(Child->Parent);
  69
  70         if (Child->Sibling)
  71             Child->Sibling = PaToVa(Child->Sibling);
  72
  73         if (Child->ComponentEntry.Identifier)
  74             Child->ComponentEntry.Identifier = PaToVa(Child->ComponentEntry.Identifier);
  75
  76         TRACE("Device 0x%X class %d type %d id '%s', parent %p\n", Child,
  77             Child->ComponentEntry.Class, Child->ComponentEntry.Type, VaToPa(Child->ComponentEntry.Identifier), Child->Parent);
  78
  79         // Go through siblings list
  80         Sibling = VaToPa(Child->Sibling);
  81         while (Sibling != NULL)
  82         {
  83             if (Sibling->ConfigurationData)
  84                 Sibling->ConfigurationData = PaToVa(Sibling->ConfigurationData);
  85
  86             if (Sibling->Child)
  87                 Sibling->Child = PaToVa(Sibling->Child);
  88
  89             if (Sibling->Parent)
  90                 Sibling->Parent = PaToVa(Sibling->Parent);
  91
  92             if (Sibling->Sibling)
  93                 Sibling->Sibling = PaToVa(Sibling->Sibling);
  94
  95             if (Sibling->ComponentEntry.Identifier)
  96                 Sibling->ComponentEntry.Identifier = PaToVa(Sibling->ComponentEntry.Identifier);
  97
  98             TRACE("Device 0x%X class %d type %d id '%s', parent %p\n", Sibling,
  99                 Sibling->ComponentEntry.Class, Sibling->ComponentEntry.Type, VaToPa(Sibling->ComponentEntry.Identifier), Sibling->Parent);
 100
 101             // Recurse into the Child tree
 102             if (VaToPa(Sibling->Child) != NULL)
 103                 ConvertConfigToVA(VaToPa(Sibling->Child));
 104
 105             Sibling = VaToPa(Sibling->Sibling);
 106         }
 107
 108         // Go to the next child
 109         Child = VaToPa(Child->Child);
 110     }
 111 }