mirror of
https://github.com/reactos/reactos.git
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143 lines
3 KiB
C
143 lines
3 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: boot/freeldr/freeldr/arch/i386/ntoskrnl.c
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* PURPOSE: NTOS glue routines for the MINIHAL library
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* PROGRAMMERS: Hervé Poussineau <hpoussin@reactos.org>
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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/* For KeStallExecutionProcessor */
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#if defined(_M_IX86) || defined(_M_AMD64)
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#include <arch/pc/pcbios.h>
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#endif
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/* FUNCTIONS *****************************************************************/
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VOID
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NTAPI
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KeInitializeEvent(
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IN PRKEVENT Event,
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IN EVENT_TYPE Type,
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IN BOOLEAN State)
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{
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memset(Event, 0, sizeof(*Event));
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}
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VOID
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FASTCALL
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KiAcquireSpinLock(
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IN PKSPIN_LOCK SpinLock)
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{
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}
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VOID
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FASTCALL
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KiReleaseSpinLock(
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IN PKSPIN_LOCK SpinLock)
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{
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}
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VOID
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NTAPI
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KeSetTimeIncrement(
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IN ULONG MaxIncrement,
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IN ULONG MinIncrement)
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{
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}
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VOID
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FASTCALL
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IoAssignDriveLetters(
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IN struct _LOADER_PARAMETER_BLOCK *LoaderBlock,
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IN PSTRING NtDeviceName,
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OUT PUCHAR NtSystemPath,
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OUT PSTRING NtSystemPathString)
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{
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}
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NTSTATUS
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FASTCALL
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IoSetPartitionInformation(
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IN PDEVICE_OBJECT DeviceObject,
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IN ULONG SectorSize,
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IN ULONG PartitionNumber,
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IN ULONG PartitionType)
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{
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return STATUS_NOT_IMPLEMENTED;
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}
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/*
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* NTSTATUS
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* FASTCALL
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* IoReadPartitionTable(
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* IN PDEVICE_OBJECT DeviceObject,
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* IN ULONG SectorSize,
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* IN BOOLEAN ReturnRecognizedPartitions,
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* OUT PDRIVE_LAYOUT_INFORMATION *PartitionBuffer);
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*
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* See boot/freeldr/freeldr/disk/partition.c
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*/
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NTSTATUS
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FASTCALL
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IoWritePartitionTable(
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IN PDEVICE_OBJECT DeviceObject,
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IN ULONG SectorSize,
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IN ULONG SectorsPerTrack,
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IN ULONG NumberOfHeads,
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IN PDRIVE_LAYOUT_INFORMATION PartitionBuffer)
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{
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return STATUS_NOT_IMPLEMENTED;
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}
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VOID
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NTAPI
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KeStallExecutionProcessor(
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IN ULONG MicroSeconds)
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{
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#if defined(_M_IX86) || defined(_M_AMD64)
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REGS Regs;
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ULONG usec_this;
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// Int 15h AH=86h
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// BIOS - WAIT (AT,PS)
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//
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// AH = 86h
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// CX:DX = interval in microseconds
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// Return:
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// CF clear if successful (wait interval elapsed)
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// CF set on error or AH=83h wait already in progress
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// AH = status (see #00496)
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// Note: The resolution of the wait period is 977 microseconds on
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// many systems because many BIOSes use the 1/1024 second fast
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// interrupt from the AT real-time clock chip which is available on INT 70;
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// because newer BIOSes may have much more precise timers available, it is
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// not possible to use this function accurately for very short delays unless
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// the precise behavior of the BIOS is known (or found through testing)
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while (MicroSeconds)
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{
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usec_this = MicroSeconds;
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if (usec_this > 4000000)
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{
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usec_this = 4000000;
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}
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Regs.b.ah = 0x86;
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Regs.w.cx = usec_this >> 16;
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Regs.w.dx = usec_this & 0xffff;
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Int386(0x15, &Regs, &Regs);
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MicroSeconds -= usec_this;
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}
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#else
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#error unimplemented
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#endif
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}
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