166 lines
2.4 KiB
C
166 lines
2.4 KiB
C
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/*++
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Copyright (c) 1996 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 memory check routine for the boot debugger.
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Author:
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David N. Cutler (davec) 3-Dec-96
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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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#include "bd.h"
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extern BOOLEAN PaeEnabled;
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BOOLEAN
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BdCheckPdeValid (
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IN PVOID Address
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)
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/*++
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Routine Description:
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This routine determines if the PDE for the specified address has the
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valid bit set.
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Agruments:
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Address - Supplies the virtual address to check.
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Return Value:
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A value of TRUE indicates that the PDE for the supplied virtual address
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does have the valid bit set, FALSE if it does not.
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--*/
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{
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return FALSE;
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}
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BOOLEAN
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BdCheckPteValid (
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IN PVOID Address
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)
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/*++
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Routine Description:
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This routine determines if the PTE for the specified address has the
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valid bit set.
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Agruments:
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Address - Supplies the virtual address to check.
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Return Value:
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A value of TRUE indicates that the PTE for the supplied virtual address
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does have the valid bit set, FALSE if it does not.
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--*/
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{
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return FALSE;
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}
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PVOID
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BdReadCheck (
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IN PVOID Address
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)
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/*++
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Routine Description:
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This routine determines if the specified address can be read.
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Arguments:
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Address - Supplies the virtual address to check.
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Return Value:
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A value of NULL is returned if the address is not valid or readable.
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Otherwise, the physical address of the corresponding virtual address
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is returned.
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--*/
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{
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return Address;
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}
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PVOID
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BdWriteCheck (
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IN PVOID Address
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)
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/*++
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Routine Description:
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This routine determines if the specified address can be written.
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Arguments:
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Address - Supplies the virtual address to check.
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Return Value:
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A value of NULL is returned if the address is not valid or writeable.
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Otherwise, the physical address of the corresponding virtual address
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is returned.
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--*/
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{
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return Address;
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}
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PVOID
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BdTranslatePhysicalAddress (
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IN PHYSICAL_ADDRESS Address
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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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Address - 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)UlongToPtr(Address.LowPart);
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}
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