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