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/*++
Copyright (c) 1991 Microsoft Corporation
Copyright (c) 1994 Digital Equipment Corporation
Module Name:
info.c
Abstract:
Author:
Ken Reneris (kenr) 08-Aug-1994
Environment:
Kernel mode only.
Revision History:
--*/
#include "halp.h"
#ifdef _PNP_POWER_
HAL_CALLBACKS HalCallback;
#endif // _PNP_POWER_
//
// External references
//
extern WINDOW_CONTROL_REGISTERS HalpIsaWindowControl;
extern WINDOW_CONTROL_REGISTERS HalpMasterWindowControl;
NTSTATUS
HalpQueryInstalledBusInformation (
OUT PVOID Buffer,
IN ULONG BufferLength,
OUT PULONG ReturnedLength
);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE,HaliQuerySystemInformation)
#pragma alloc_text(PAGE,HaliSetSystemInformation)
#endif
NTSTATUS
HaliQuerySystemInformation(
IN HAL_QUERY_INFORMATION_CLASS InformationClass,
IN ULONG BufferSize,
IN OUT PVOID Buffer,
OUT PULONG ReturnedLength
)
/*++
Routine Description:
The function returns system-wide information controlled by the HAL for a
variety of classes.
Arguments:
InformationClass - Information class of the request.
BufferSize - Size of buffer supplied by the caller.
Buffer - Supplies the space to store the data and pass additional info.
ReturnedLength - Supplies a count in bytes of the amount of data returned.
Return Value:
STATUS_SUCCESS or error.
--*/
{
NTSTATUS Status;
PULONG mapRegisters;
switch (InformationClass) {
case HalInstalledBusInformation:
Status = HalpQueryInstalledBusInformation (
Buffer,
BufferSize,
ReturnedLength
);
break;
case HalProfileSourceInformation:
Status = HalpProfileSourceInformation (
Buffer,
BufferSize,
ReturnedLength);
break;
case HalMapRegisterInformation:
mapRegisters = (PULONG)Buffer;
if ( BufferSize < 4 ) {
Status = STATUS_BUFFER_TOO_SMALL;
} else {
switch ( *(PULONG)Buffer ) {
case Isa:
*mapRegisters = HalpIsaWindowControl.WindowSize / PAGE_SIZE;
*ReturnedLength = 4;
Status = STATUS_SUCCESS;
break;
case Eisa:
case PCIBus:
*mapRegisters = HalpMasterWindowControl.WindowSize / PAGE_SIZE;
*ReturnedLength = 4;
Status = STATUS_SUCCESS;
break;
default:
Status = STATUS_INVALID_PARAMETER;
break;
}
}
break;
default:
Status = STATUS_INVALID_LEVEL;
break;
}
return(Status);
}
NTSTATUS
HaliSetSystemInformation (
IN HAL_SET_INFORMATION_CLASS InformationClass,
IN ULONG BufferSize,
IN PVOID Buffer
)
/*++
Routine Description:
The function allows setting of various fields return by
HalQuerySystemInformation.
Arguments:
InformationClass - Information class of the request.
BufferSize - Size of buffer supplied by the caller.
Buffer - Supplies the data to be set.
Return Value:
STATUS_SUCCESS or error.
--*/
{
NTSTATUS Status;
switch (InformationClass) {
case HalProfileSourceInterval:
Status = HalpProfileSourceInterval (
Buffer,
BufferSize);
break;
default:
Status = STATUS_INVALID_LEVEL;
break;
}
return Status;
}
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