246 lines
3.7 KiB
C
246 lines
3.7 KiB
C
/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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stubs.c
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Abstract:
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This module implements stub routines for the boot code.
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Author:
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David N. Cutler (davec) 7-Nov-1990
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Environment:
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Kernel mode only.
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Revision History:
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--*/
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#define _BLDR_
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#include "ntos.h"
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//
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// Define global data.
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//
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ULONG BlDcacheFillSize = 32;
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VOID
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KeBugCheck (
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IN ULONG BugCheckCode
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)
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/*++
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Routine Description:
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This function crashes the system in a controlled manner.
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Arguments:
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BugCheckCode - Supplies the reason for the bug check.
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Return Value:
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None.
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--*/
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{
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//
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// Print out the bug check code and break.
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//
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DbgPrint("\n*** BugCheck (%lx) ***\n\n", BugCheckCode);
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while(TRUE) {
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DbgBreakPoint();
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};
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return;
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}
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LARGE_INTEGER
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KeQueryPerformanceCounter (
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OUT PLARGE_INTEGER Frequency OPTIONAL
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)
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/*++
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Routine Description:
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This routine is a stub for the kernel debugger and always returns a
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value of zero.
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Arguments:
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Frequency - Supplies an optional pointer to a variable which receives
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the performance counter frequency in Hertz.
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Return Value:
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A value of zero is returned.
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--*/
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{
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LARGE_INTEGER Counter;
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//
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// Return the current system time as the function value.
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//
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Counter.LowPart = 0;
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Counter.HighPart = 0;
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return Counter;
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}
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VOID
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KeStallExecutionProcessor (
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IN ULONG MicroSeconds
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)
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/*++
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Routine Description:
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This function stalls execution for the specified number of microseconds.
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Arguments:
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MicroSeconds - Supplies the number of microseconds that execution is to be
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stalled.
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Return Value:
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None.
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--*/
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{
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ULONG Index;
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ULONG Limit;
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PULONG Store;
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ULONG Value;
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//
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// ****** begin temporary code ******
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//
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// This code must be replaced with a smarter version. For now it assumes
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// an execution rate of 40,000,000 instructions per second and 4 instructions
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// per iteration.
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//
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Store = &Value;
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Limit = (MicroSeconds * 40 / 4);
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for (Index = 0; Index < Limit; Index += 1) {
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*Store = Index;
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}
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return;
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}
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PVOID
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MmDbgReadCheck (
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IN PVOID VirtualAddress
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)
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/*++
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Routine Description:
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This routine returns the phyiscal address for a virtual address
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which is valid (mapped) for read access.
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Arguments:
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VirtualAddress - Supplies the virtual address to check.
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Return Value:
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Returns NULL if the address is not valid or readable, otherwise
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returns the physical address of the corresponding virtual address.
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--*/
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{
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return VirtualAddress;
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}
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PVOID
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MmDbgTranslatePhysicalAddress (
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IN PHYSICAL_ADDRESS PhysicalAddress
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)
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/*++
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Routine Description:
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This routine returns the phyiscal address for a physical address
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which is valid (mapped).
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Arguments:
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PhysicalAddress - Supplies the physical address to check.
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Return Value:
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Returns NULL if the address is not valid or readable, otherwise
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returns the physical address of the corresponding virtual address.
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--*/
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{
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return (PVOID)PhysicalAddress.LowPart;
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}
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PVOID
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MmDbgWriteCheck (
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IN PVOID VirtualAddress
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)
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/*++
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Routine Description:
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This routine returns the phyiscal address for a virtual address
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which is valid (mapped) for write access.
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Arguments:
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VirtualAddress - Supplies the virtual address to check.
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Return Value:
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Returns NULL if the address is not valid or readable, otherwise
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returns the physical address of the corresponding virtual address.
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--*/
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{
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return VirtualAddress;
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}
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VOID
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RtlAssert(
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IN PVOID FailedAssertion,
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IN PVOID FileName,
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IN ULONG LineNumber,
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IN PCHAR Message OPTIONAL
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)
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{
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DbgPrint( "\n*** Assertion failed\n");
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while (TRUE) {
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DbgBreakPoint();
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}
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}
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