boot/freeldr/freeldr/arch/i386/ntoskrnl.c

   1 #include <ntoskrnl.h>
   2
   3 /* For KeStallExecutionProcessor */
   4 #if defined(_M_IX86) || defined(_M_AMD64)
   5 #include <arch/pc/pcbios.h>
   6 #endif
   7
   8 VOID
   9 NTAPI
  10 KeInitializeEvent(
  11     IN PRKEVENT Event,
  12     IN EVENT_TYPE Type,
  13     IN BOOLEAN State)
  14 {
  15 }
  16
  17 VOID
  18 FASTCALL
  19 KiAcquireSpinLock(
  20     IN PKSPIN_LOCK SpinLock)
  21 {
  22 }
  23
  24 VOID
  25 FASTCALL
  26 KiReleaseSpinLock(
  27     IN PKSPIN_LOCK SpinLock)
  28 {
  29 }
  30
  31 VOID
  32 NTAPI
  33 KeSetTimeIncrement(
  34     IN ULONG MaxIncrement,
  35     IN ULONG MinIncrement)
  36 {
  37 }
  38
  39 NTKERNELAPI
  40 VOID
  41 FASTCALL
  42 IoAssignDriveLetters(
  43     IN struct _LOADER_PARAMETER_BLOCK *LoaderBlock,
  44     IN PSTRING NtDeviceName,
  45     OUT PUCHAR NtSystemPath,
  46     OUT PSTRING NtSystemPathString)
  47 {
  48 }
  49
  50 NTKERNELAPI
  51 NTSTATUS
  52 FASTCALL
  53 IoSetPartitionInformation(
  54     IN PDEVICE_OBJECT DeviceObject,
  55     IN ULONG SectorSize,
  56     IN ULONG PartitionNumber,
  57     IN ULONG PartitionType)
  58 {
  59     return STATUS_NOT_IMPLEMENTED;
  60 }
  61
  62 NTKERNELAPI
  63 NTSTATUS
  64 FASTCALL
  65 IoWritePartitionTable(
  66     IN PDEVICE_OBJECT DeviceObject,
  67     IN ULONG SectorSize,
  68     IN ULONG SectorsPerTrack,
  69     IN ULONG NumberOfHeads,
  70     IN struct _DRIVE_LAYOUT_INFORMATION *PartitionBuffer)
  71 {
  72     return STATUS_NOT_IMPLEMENTED;
  73 }
  74
  75 NTHALAPI
  76 VOID
  77 NTAPI
  78 KeStallExecutionProcessor(
  79     IN ULONG MicroSeconds)
  80 {
  81 #if defined(_M_IX86) || defined(_M_AMD64)
  82     REGS Regs;
  83     ULONG usec_this;
  84
  85     // Int 15h AH=86h
  86     // BIOS - WAIT (AT,PS)
  87     //
  88     // AH = 86h
  89     // CX:DX = interval in microseconds
  90     // Return:
  91     // CF clear if successful (wait interval elapsed)
  92     // CF set on error or AH=83h wait already in progress
  93     // AH = status (see #00496)
  94
  95     // Note: The resolution of the wait period is 977 microseconds on
  96     // many systems because many BIOSes use the 1/1024 second fast
  97     // interrupt from the AT real-time clock chip which is available on INT 70;
  98     // because newer BIOSes may have much more precise timers available, it is
  99     // not possible to use this function accurately for very short delays unless
 100     // the precise behavior of the BIOS is known (or found through testing)
 101
 102     while (MicroSeconds)
 103     {
 104         usec_this = MicroSeconds;
 105
 106         if (usec_this > 4000000)
 107         {
 108             usec_this = 4000000;
 109         }
 110
 111         Regs.b.ah = 0x86;
 112         Regs.w.cx = usec_this >> 16;
 113         Regs.w.dx = usec_this & 0xffff;
 114         Int386(0x15, &Regs, &Regs);
 115
 116         MicroSeconds -= usec_this;
 117     }
 118 #else
 119     #error unimplemented
 120 #endif
 121 }