/*++

Copyright (c) 1997-2000 Microsoft Corporation

Module Name:

    registry.c

Abstract:

    This module contains the code that manipulates the ARC firmware
    tree and other elements in the registry.

Author:

    Bob Rinne
    Ravisankar Pudipeddi (ravisp) 1 Dec 1996
    Neil Sandlin (neilsa) June 1 1999

Environment:

    Kernel mode

Revision History :


--*/

#include "pch.h"

//
// Internal References
//

VOID
PcmciaGetRegistryContextRange(
    IN HANDLE instanceHandle,
    IN PCWSTR Name,
    IN OPTIONAL const PCMCIA_CONTEXT_RANGE IncludeRange[],
    IN OPTIONAL const PCMCIA_CONTEXT_RANGE ExcludeRange[],
    OUT PPCMCIA_CONTEXT pContext
    );

ULONG
PcmciaGetDetectedFdoIrqMask(
    IN PFDO_EXTENSION FdoExtension
    );

NTSTATUS
PcmciaScanHardwareDescription(
    VOID
    );

NTSTATUS
PcmciaGetHardwareDetectedIrqMask(
    IN HANDLE handlePcCard
    );

//
//
// Registry related definitions
//
#define PCMCIA_REGISTRY_PARAMETERS_KEY               L"Pcmcia\\Parameters"
#define PCMCIA_REGISTRY_DETECTED_DEVICE_KEY          L"ControllerProperties"


//
// Per controller values (in control\class)
//

#define PCMCIA_REGISTRY_PCI_CONTEXT_VALUE  L"CBSSCSContextRanges"
#define PCMCIA_REGISTRY_CB_CONTEXT_VALUE     L"CBSSCBContextRanges"
#define PCMCIA_REGISTRY_EXCA_CONTEXT_VALUE L"CBSSEXCAContextRanges"
#define PCMCIA_REGISTRY_CACHED_IRQMASK   L"CachedIrqMask"
#define PCMCIA_REGISTRY_COMPATIBLE_TYPE  L"CompatibleControllerType"
#define PCMCIA_REGISTRY_VOLTAGE_PREFERENCE L"VoltagePreference"

//
// Irq detection values (in hardware\description)
//

#define PCMCIA_REGISTRY_CONTROLLER_TYPE  L"OtherController"


#ifdef ALLOC_PRAGMA
#pragma alloc_text(INIT,PcmciaLoadGlobalRegistryValues)
#pragma alloc_text(INIT,PcmciaScanHardwareDescription)
#pragma alloc_text(INIT,PcmciaGetHardwareDetectedIrqMask)
#pragma alloc_text(PAGE,PcmciaGetControllerRegistrySettings)
#pragma alloc_text(PAGE,PcmciaGetRegistryFdoIrqMask)
#pragma alloc_text(PAGE,PcmciaGetDetectedFdoIrqMask)
#pragma alloc_text(PAGE,PcmciaGetLegacyDetectedControllerType)
#pragma alloc_text(PAGE,PcmciaSetLegacyDetectedControllerType)
#pragma alloc_text(PAGE,PcmciaGetRegistryContextRange)
#endif


NTSTATUS
PcmciaGetHardwareDetectedIrqMask(
    HANDLE handlePcCard
    )
/*++

Routine Description:

    This routine looks through the OtherController key for pccard entries
    created by NTDETECT. For each entry, the IRQ scan data is read in and
    saved for later.


Arguments:

    handlePcCard - open handle to "OtherController" key in registry at
                        HARDWARE\Description\System\MultifunctionAdapter\<ISA>

Return value:

    status

--*/
{
#define VALUE2_BUFFER_SIZE sizeof(KEY_VALUE_PARTIAL_INFORMATION) + sizeof(CM_PCCARD_DEVICE_DATA) + sizeof(CM_FULL_RESOURCE_DESCRIPTOR)
    UCHAR valueBuffer[VALUE2_BUFFER_SIZE];
    PKEY_VALUE_PARTIAL_INFORMATION valueInfo = (PKEY_VALUE_PARTIAL_INFORMATION) valueBuffer;

    NTSTATUS            status;
    KEY_FULL_INFORMATION KeyFullInfo;
    PKEY_BASIC_INFORMATION subKeyInfo = NULL;
    OBJECT_ATTRIBUTES attributes;
    UNICODE_STRING  strSubKey = {0};
    UNICODE_STRING  strIdentifier;
    UNICODE_STRING  strConfigData;
    HANDLE              handleSubKey = NULL;
    ULONG               subKeyInfoSize;
    ULONG               index;
    ULONG               resultLength;

    RtlInitUnicodeString(&strIdentifier, L"Identifier");
    RtlInitUnicodeString(&strConfigData, L"Configuration Data");

    status = ZwQueryKey(handlePcCard,
                        KeyFullInformation,
                        &KeyFullInfo,
                        sizeof(KeyFullInfo),
                        &resultLength);

    if ((!NT_SUCCESS(status) && (status != STATUS_BUFFER_OVERFLOW))) {
        goto cleanup;
    }

    strSubKey.MaximumLength = (USHORT) KeyFullInfo.MaxNameLen;
    subKeyInfoSize = sizeof(KEY_BASIC_INFORMATION) + KeyFullInfo.MaxNameLen;
    subKeyInfo = ExAllocatePool(PagedPool, subKeyInfoSize);

    if (!subKeyInfo) {
        goto cleanup;
    }

    for (index=0;;index++) {

        //
        // Loop through the children of the PcCardController key
        //

        status = ZwEnumerateKey(handlePcCard,
                                index,
                                KeyBasicInformation,
                                subKeyInfo,
                                subKeyInfoSize,
                                &resultLength);

        if (!NT_SUCCESS(status)) {
            goto cleanup;
        }

        //
        // Init the name
        //

        if (subKeyInfo->NameLength > strSubKey.MaximumLength) {
            continue;
        }
        strSubKey.Length = (USHORT) subKeyInfo->NameLength;
        strSubKey.Buffer = subKeyInfo->Name;

        //
        // Get a handle to a child of PcCardController
        //


        InitializeObjectAttributes(&attributes,
                                   &strSubKey,
                                   0,   //Attributes
                                   handlePcCard,
                                   NULL //SecurityDescriptor
                                   );

        if (handleSubKey) {
            // close handle from previous iteration
            ZwClose(handleSubKey);
            handleSubKey = NULL;
        }

        status = ZwOpenKey(&handleSubKey, MAXIMUM_ALLOWED, &attributes);

        if (!NT_SUCCESS(status)) {
            goto cleanup;
        }

        //
        // Get the value of "Identifier"
        //

        status = ZwQueryValueKey(handleSubKey,
                                         &strIdentifier,
                                         KeyValuePartialInformation,
                                         valueInfo,
                                         VALUE2_BUFFER_SIZE,
                                         &resultLength);


        if (NT_SUCCESS(status) || (status == STATUS_BUFFER_OVERFLOW)) {
            PWCHAR pData = (PWCHAR)valueInfo->Data;

            if ((valueInfo->DataLength == 17*sizeof(WCHAR)) &&
                (pData[0] == (WCHAR)'P') &&
                (pData[1] == (WCHAR)'c') &&
                (pData[2] == (WCHAR)'C') &&
                (pData[3] == (WCHAR)'a') &&
                (pData[4] == (WCHAR)'r') &&
                (pData[5] == (WCHAR)'d')) {

                //
                // Get the IRQ detection data
                //
                status = ZwQueryValueKey(handleSubKey,
                                         &strConfigData,
                                         KeyValuePartialInformation,
                                         valueInfo,
                                         VALUE2_BUFFER_SIZE,
                                         &resultLength);

                if (NT_SUCCESS(status)) {
                    PCM_FULL_RESOURCE_DESCRIPTOR pFullDesc = (PCM_FULL_RESOURCE_DESCRIPTOR) valueInfo->Data;
                    PCM_PARTIAL_RESOURCE_DESCRIPTOR pPartialDesc = (PCM_PARTIAL_RESOURCE_DESCRIPTOR) pFullDesc->PartialResourceList.PartialDescriptors;

                    if ((pPartialDesc->Type == CmResourceTypeDeviceSpecific) &&
                         (pPartialDesc->u.DeviceSpecificData.DataSize == sizeof(CM_PCCARD_DEVICE_DATA))) {

                        PCM_PCCARD_DEVICE_DATA pPcCardData = (PCM_PCCARD_DEVICE_DATA) ((ULONG_PTR)&pPartialDesc->u.DeviceSpecificData + 3*sizeof(ULONG));
                        PPCMCIA_NTDETECT_DATA pNewData;

                        pNewData = ExAllocatePool(PagedPool, sizeof(PCMCIA_NTDETECT_DATA));

                        if (pNewData == NULL) {
                            goto cleanup;
                        }

                        pNewData->PcCardData = *pPcCardData;
                        pNewData->Next = pNtDetectDataList;
                        pNtDetectDataList = pNewData;

                    }
                }
            }
        }

    }
cleanup:
    if (handleSubKey) {
        ZwClose(handleSubKey);
    }

    if (subKeyInfo) {
        ExFreePool(subKeyInfo);
    }
    return STATUS_SUCCESS;
}



ULONG
PcmciaGetDetectedFdoIrqMask(
    IN PFDO_EXTENSION FdoExtension
    )
/*++

Routine Description:

    This routine looks through the cached PCMCIA_NTDETECT_DATA entries
    to see if there was an entry for this controller. It then returns the
    detected irq mask for that controller.

Arguments:

    FdoExtension - The fdo extension corresponding to the PCMCIA controller

Return value:

    status

--*/
{

    PPCMCIA_NTDETECT_DATA pData;
    PCM_PCCARD_DEVICE_DATA pPcCardData;
    ULONG detectedIrqMask = 0;

    if (FdoExtension->SocketList == NULL) {
        return 0;
    }

    for (pData = pNtDetectDataList; pData != NULL; pData = pData->Next) {

        pPcCardData = &pData->PcCardData;


        if (CardBusExtension(FdoExtension)) {

            if (!(pPcCardData->Flags & PCCARD_DEVICE_PCI) || ((pPcCardData->BusData) == 0) ||
                 ((pPcCardData->BusData & 0xff) != FdoExtension->PciBusNumber) ||
                 (((pPcCardData->BusData >> 8) & 0xff) != FdoExtension->PciDeviceNumber)) {
                continue;
            }

            SetFdoFlag(FdoExtension, PCMCIA_FDO_IRQ_DETECT_DEVICE_FOUND);

            if (!(pPcCardData->Flags & PCCARD_MAP_ERROR)) {
                //
                // we found the device, and the map looks good
                //
                break;
            }

        } else {

            if ((pPcCardData->Flags & PCCARD_DEVICE_PCI) ||
                (pPcCardData->LegacyBaseAddress != (ULONG_PTR)FdoExtension->SocketList->AddressPort)) {
                continue;
            }

            SetFdoFlag(FdoExtension, PCMCIA_FDO_IRQ_DETECT_DEVICE_FOUND);

            if (!(pPcCardData->Flags & PCCARD_MAP_ERROR)) {
                //
                // we found the device, and the map looks good
                //
                break;
            }

        }
    }

    if (pData) {
        ULONG i;
        //
        // Found the entry
        //
        // Since we don't currently handle "rewired" irqs, we can compact
        // it down to a bit mask, throwing away irqs that are wired, say
        // IRQ12 on the controller to IRQ15 on the isa bus.
        //

        for (i = 1; i < 16; i++) {
            if (pPcCardData->IRQMap[i] == i) {
                detectedIrqMask |= (1<<i);
            }
        }
        SetFdoFlag(FdoExtension, PCMCIA_FDO_IRQ_DETECT_COMPLETED);
    }
    return detectedIrqMask;
}



NTSTATUS
PcmciaScanHardwareDescription(
    VOID
    )
/*++

Routine Description:

    This routine finds the "OtherController" entry in
    HARDWARE\Description\System\MultifunctionAdapter\<ISA>. This is
    where NTDETECT stores irq scan results.

    It also looks for machines that aren't supported, for example MCA
    bus.

Arguments:

Return value:

    status

--*/
{
#define VALUE_BUFFER_SIZE sizeof(KEY_VALUE_PARTIAL_INFORMATION) + 3*sizeof(WCHAR)

    UCHAR valueBuffer[VALUE_BUFFER_SIZE];
    PKEY_VALUE_PARTIAL_INFORMATION valueInfo = (PKEY_VALUE_PARTIAL_INFORMATION) valueBuffer;
    PKEY_BASIC_INFORMATION subKeyInfo = NULL;
    KEY_FULL_INFORMATION KeyFullInfo;

    HANDLE              handleRoot = NULL;
    HANDLE              handleSubKey = NULL;
    HANDLE              handlePcCard = NULL;
    UNICODE_STRING  strRoot, strIdentifier;
    UNICODE_STRING  strSubKey = {0};
    UNICODE_STRING  strPcCard = {0};
    NTSTATUS            status;
    OBJECT_ATTRIBUTES attributes;
    ULONG               subKeyInfoSize;
    ULONG               resultLength;
    ULONG               index;

    PAGED_CODE();

    //
    // Get a handle to the MultifunctionAdapter key
    //

    RtlInitUnicodeString(&strRoot, L"\\Registry\\MACHINE\\HARDWARE\\DESCRIPTION\\System\\MultiFunctionAdapter");
    RtlInitUnicodeString(&strIdentifier, L"Identifier");
    RtlInitUnicodeString(&strPcCard, PCMCIA_REGISTRY_CONTROLLER_TYPE);

    InitializeObjectAttributes(&attributes,
                               &strRoot,
                               OBJ_CASE_INSENSITIVE,
                               NULL,
                               NULL);

    status = ZwOpenKey(&handleRoot, MAXIMUM_ALLOWED, &attributes);

    if (!NT_SUCCESS(status)) {
        goto cleanup;
    }

    status = ZwQueryKey(handleRoot,
                        KeyFullInformation,
                        &KeyFullInfo,
                        sizeof(KeyFullInfo),
                        &resultLength);

    if ((!NT_SUCCESS(status) && (status != STATUS_BUFFER_OVERFLOW))) {
        goto cleanup;
    }

    strSubKey.MaximumLength = (USHORT) KeyFullInfo.MaxNameLen;
    subKeyInfoSize = sizeof(KEY_BASIC_INFORMATION) + KeyFullInfo.MaxNameLen;
    subKeyInfo = ExAllocatePool(PagedPool, subKeyInfoSize);

    if (!subKeyInfo) {
        goto cleanup;
    }

    for (index=0;;index++) {

        //
        // Loop through the children of "MultifunctionAdapter"
        //

        status = ZwEnumerateKey(handleRoot,
                                index,
                                KeyBasicInformation,
                                subKeyInfo,
                                subKeyInfoSize,
                                &resultLength);

        if (!NT_SUCCESS(status)) {
            goto cleanup;
        }

        //
        // Init the name
        //

        if (subKeyInfo->NameLength > strSubKey.MaximumLength) {
            continue;
        }
        strSubKey.Length = (USHORT) subKeyInfo->NameLength;
        strSubKey.Buffer = subKeyInfo->Name;

        //
        // Get a handle to a child of MultifunctionAdapter
        //


        InitializeObjectAttributes(&attributes,
                                   &strSubKey,
                                   0,   //Attributes
                                   handleRoot,
                                   NULL //SecurityDescriptor
                                   );

        if (handleSubKey) {
            // close handle from previous iteration
            ZwClose(handleSubKey);
            handleSubKey = NULL;
        }

        status = ZwOpenKey(&handleSubKey, MAXIMUM_ALLOWED, &attributes);

        if (!NT_SUCCESS(status)) {
            goto cleanup;
        }

        //
        // Get the value of "Identifier"
        //

        status = ZwQueryValueKey(handleSubKey,
                                 &strIdentifier,
                                 KeyValuePartialInformation,
                                 valueInfo,
                                 VALUE_BUFFER_SIZE,
                                 &resultLength);


        if (NT_SUCCESS(status)) {
            PWCHAR pData = (PWCHAR)valueInfo->Data;

            if ((valueInfo->DataLength == 4*sizeof(WCHAR)) &&
                (pData[0] == (WCHAR)'M') &&
                (pData[1] == (WCHAR)'C') &&
                (pData[2] == (WCHAR)'A') &&
                (pData[3] == UNICODE_NULL)) {
                status = STATUS_NO_SUCH_DEVICE;
                goto cleanup;
            }

            if ((valueInfo->DataLength == 4*sizeof(WCHAR)) &&
                (pData[0] == (WCHAR)'I') &&
                (pData[1] == (WCHAR)'S') &&
                (pData[2] == (WCHAR)'A') &&
                (pData[3] == UNICODE_NULL)) {

                InitializeObjectAttributes(&attributes,
                                           &strPcCard,
                                           0,   //Attributes
                                           handleSubKey,
                                           NULL //SecurityDescriptor
                                           );

                status = ZwOpenKey(&handlePcCard, MAXIMUM_ALLOWED, &attributes);

                if (NT_SUCCESS(status)) {

                    status = PcmciaGetHardwareDetectedIrqMask(handlePcCard);
                    ZwClose(handlePcCard);
                }
            }
        }
    }

cleanup:
    if (handleRoot) {
        ZwClose(handleRoot);
    }

    if (handleSubKey) {
        ZwClose(handleSubKey);
    }

    if (subKeyInfo) {
        ExFreePool(subKeyInfo);
    }

    if (status == STATUS_NO_SUCH_DEVICE) {
        //
        // Must be an MCA machine
        //
        return status;
    }
    return STATUS_SUCCESS;
}



NTSTATUS
PcmciaLoadGlobalRegistryValues(
    VOID
    )
/*++

Routine Description:

    This routine is called at driver init time to load in various global
    options from the registry.
    These are read in from SYSTEM\CurrentControlSet\Services\Pcmcia\Parameters.

Arguments:

    none

Return value:

    none

--*/
{
    PRTL_QUERY_REGISTRY_TABLE parms;
    NTSTATUS                      status;
    ULONG                         parmsSize;
    ULONG i;

    status = PcmciaScanHardwareDescription();

    if (!NT_SUCCESS(status)) {
        return status;
    }

    //
    // Needs a null entry to terminate the list
    //

    parmsSize = sizeof(RTL_QUERY_REGISTRY_TABLE) * (GlobalInfoCount+1);

    parms = ExAllocatePool(PagedPool, parmsSize);

    if (!parms) {
         return STATUS_INSUFFICIENT_RESOURCES;
    }

    RtlZeroMemory(parms, parmsSize);

    //
    // Fill in the query table from our table
    //

    for (i = 0; i < GlobalInfoCount; i++) {
        parms[i].Flags        = RTL_QUERY_REGISTRY_DIRECT;
        parms[i].Name             = GlobalRegistryInfo[i].Name;
        parms[i].EntryContext  = GlobalRegistryInfo[i].pValue;
        parms[i].DefaultType   = REG_DWORD;
        parms[i].DefaultData   = &GlobalRegistryInfo[i].Default;
        parms[i].DefaultLength = sizeof(ULONG);
    }

    //
    // Perform the query
    //

    status = RtlQueryRegistryValues(RTL_REGISTRY_SERVICES | RTL_REGISTRY_OPTIONAL,
                                    PCMCIA_REGISTRY_PARAMETERS_KEY,
                                    parms,
                                    NULL,
                                    NULL);

    if (!NT_SUCCESS(status)) {
         //
         // This is possible during text mode setup
         //

         for (i = 0; i < GlobalInfoCount; i++) {
             *GlobalRegistryInfo[i].pValue = GlobalRegistryInfo[i].Default;
         }
    }

    if (initUsePolledCsc) {
         PcmciaGlobalFlags |= PCMCIA_GLOBAL_FORCE_POLL_MODE;
    }

    if (initDisableAcpiNameSpaceCheck) {
         PcmciaGlobalFlags |= PCMCIA_DISABLE_ACPI_NAMESPACE_CHECK;
    }

    if (initDefaultRouteR2ToIsa) {
         PcmciaGlobalFlags |= PCMCIA_DEFAULT_ROUTE_R2_TO_ISA;
    }

    if (EventDpcDelay > PCMCIA_MAX_EVENT_DPC_DELAY) {
        EventDpcDelay = PCMCIA_MAX_EVENT_DPC_DELAY;
    }


    if (!pcmciaIsaIrqRescanComplete) {
        UNICODE_STRING  unicodeKey, unicodeValue;
        OBJECT_ATTRIBUTES objectAttributes;
        HANDLE              handle;
        ULONG               value;

        //
        // This mechanism is used to throw away the cached ISA irq map values. To do this
        // only once, we make sure a value in the registry is zero (or non-existant), and
        // here we set it to one.
        //

        RtlInitUnicodeString(&unicodeKey,
                                    L"\\Registry\\MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Pcmcia\\Parameters");
        RtlZeroMemory(&objectAttributes, sizeof(OBJECT_ATTRIBUTES));
        InitializeObjectAttributes(&objectAttributes,
                                   &unicodeKey,
                                   OBJ_CASE_INSENSITIVE,
                                   NULL,
                                   NULL);

        if (NT_SUCCESS(ZwOpenKey(&handle, KEY_READ | KEY_WRITE, &objectAttributes))) {

            RtlInitUnicodeString(&unicodeValue, PCMCIA_REGISTRY_ISA_IRQ_RESCAN_COMPLETE);
            value = 1;

            ZwSetValueKey(handle,
                          &unicodeValue,
                          0,
                          REG_DWORD,
                          &value,
                          sizeof(value));

            ZwClose(handle);
        }

    }

    ExFreePool(parms);

    return STATUS_SUCCESS;
}



NTSTATUS
PcmciaGetControllerRegistrySettings(
    IN OUT PFDO_EXTENSION FdoExtension
    )
/*++

Routine Description:

    This routine looks in the registry to see if a compatible controller type
    was specified in the INF.

Arguments:

    FdoExtension - The fdo extension corresponding to the PCMCIA controller

Return value:

--*/
{
    NTSTATUS status = STATUS_UNSUCCESSFUL;
    UNICODE_STRING  KeyName;
    HANDLE instanceHandle;
    UCHAR               buffer[sizeof(KEY_VALUE_PARTIAL_INFORMATION) + sizeof(ULONG)];
    PKEY_VALUE_PARTIAL_INFORMATION value = (PKEY_VALUE_PARTIAL_INFORMATION) buffer;
    ULONG               length;
    BOOLEAN             UseLegacyIrqMask = TRUE;
    ULONG               detectedIrqMask;

    if (FdoExtension->Pdo) {
        status = IoOpenDeviceRegistryKey(FdoExtension->Pdo,
                                         PLUGPLAY_REGKEY_DRIVER,
                                         KEY_READ,
                                         &instanceHandle
                                         );
    }

    if (!NT_SUCCESS(status)) {
        instanceHandle = NULL;
    }

    if (instanceHandle) {

        //
        // Look to see if a controller ID was specified
        //
        RtlInitUnicodeString(&KeyName, PCMCIA_REGISTRY_COMPATIBLE_TYPE);

        status =  ZwQueryValueKey(instanceHandle,
                                  &KeyName,
                                  KeyValuePartialInformation,
                                  value,
                                  sizeof(buffer),
                                  &length);


        if (NT_SUCCESS(status)) {
            PcmciaSetControllerType(FdoExtension, *(PPCMCIA_CONTROLLER_TYPE)(value->Data));
        }

        //
        // Check for voltage preference
        // When an 3v R2 card is plugged in, and the controller
        // sets both 5v and 3.3v, this allows 3.3v to be preferred.
        //
        RtlInitUnicodeString(&KeyName, PCMCIA_REGISTRY_VOLTAGE_PREFERENCE);

        status =  ZwQueryValueKey(instanceHandle,
                                  &KeyName,
                                  KeyValuePartialInformation,
                                  value,
                                  sizeof(buffer),
                                  &length);


        if (NT_SUCCESS(status) && (*(PULONG)(value->Data) == 33)) {
            SetDeviceFlag(FdoExtension, PCMCIA_FDO_PREFER_3V);
        }
    }

    //
    // Retrieve context ranges
    //

    PcmciaGetRegistryContextRange(instanceHandle,
                                  PCMCIA_REGISTRY_PCI_CONTEXT_VALUE,
                                  DefaultPciContextSave,
                                  NULL,
                                  &FdoExtension->PciContext
                                  );

    PcmciaGetRegistryContextRange(instanceHandle,
                                  PCMCIA_REGISTRY_CB_CONTEXT_VALUE,
                                  DefaultCardbusContextSave,
                                  ExcludeCardbusContextRange,
                                  &FdoExtension->CardbusContext
                                  );

    PcmciaGetRegistryContextRange(instanceHandle,
                                  PCMCIA_REGISTRY_EXCA_CONTEXT_VALUE,
                                  NULL,
                                  NULL,
                                  &FdoExtension->ExcaContext);


    if (instanceHandle) {
        ZwClose(instanceHandle);
    }


    FdoExtension->AttributeMemoryLow  =  globalAttributeMemoryLow;
    FdoExtension->AttributeMemoryHigh =  globalAttributeMemoryHigh;

    if (FdoExtension->ControllerType == PcmciaDatabook) {
        FdoExtension->AttributeMemoryAlignment = TCIC_WINDOW_ALIGNMENT;
    } else {
        FdoExtension->AttributeMemoryAlignment = PCIC_WINDOW_ALIGNMENT;
    }

    //
    // Assign default attribute memory window size
    //

    if (globalAttributeMemorySize == 0) {
        switch (FdoExtension->ControllerType) {

        case PcmciaDatabook:
            FdoExtension->AttributeMemorySize = TCIC_WINDOW_SIZE;
             break;
        default:
            FdoExtension->AttributeMemorySize = PCIC_WINDOW_SIZE;
            break;
        }
    } else {
        FdoExtension->AttributeMemorySize = globalAttributeMemorySize;
    }

    //
    // See if the user asked for some special IRQ routing considerations based
    // on controller type
    //

    if (CardBusExtension(FdoExtension)) {

        //
        // route to PCI based on controller type
        //

        if (pcmciaIrqRouteToPciController) {
            ULONG ctlr = pcmciaIrqRouteToPciController;

            //
            // Check for exact match, or class if only a class was specified
            //
            if ((ctlr == FdoExtension->ControllerType) ||
                 ((PcmciaClassFromControllerType(ctlr) == ctlr) && (ctlr == PcmciaClassFromControllerType(FdoExtension->ControllerType)))) {

                SetFdoFlag(FdoExtension, PCMCIA_FDO_PREFER_PCI_ROUTING);
            }
        }

        //
        // route to ISA based on controller type
        //

        if (pcmciaIrqRouteToIsaController) {
            ULONG ctlr = pcmciaIrqRouteToIsaController;

            //
            // Check for exact match, or class if only a class was specified
            //
            if ((ctlr == FdoExtension->ControllerType) ||
                 ((PcmciaClassFromControllerType(ctlr) == ctlr) && (ctlr == PcmciaClassFromControllerType(FdoExtension->ControllerType)))) {

                SetFdoFlag(FdoExtension, PCMCIA_FDO_PREFER_ISA_ROUTING);
            }
        }

        //
        // route to PCI based on controller location
        //

        if (pcmciaIrqRouteToPciLocation) {
            ULONG loc = pcmciaIrqRouteToPciLocation;

            if ( ((loc & 0xff) == FdoExtension->PciBusNumber) &&
                  (((loc >> 8) & 0xff) == FdoExtension->PciDeviceNumber)) {

                SetFdoFlag(FdoExtension, PCMCIA_FDO_FORCE_PCI_ROUTING);
            }
        }

        //
        // route to ISA based on controller location
        //

        if (pcmciaIrqRouteToIsaLocation) {
            ULONG loc = pcmciaIrqRouteToIsaLocation;

            if ( ((loc & 0xff) == FdoExtension->PciBusNumber) &&
                  (((loc >> 8) & 0xff) == FdoExtension->PciDeviceNumber)) {

                SetFdoFlag(FdoExtension, PCMCIA_FDO_FORCE_ISA_ROUTING);
            }
        }

    }


    return status;
}



VOID
PcmciaGetRegistryFdoIrqMask(
    IN OUT PFDO_EXTENSION FdoExtension
    )
/*++

Routine Description:

    This routine fills in the field "AllocatedIrqMask" in the specified
    fdo extension.

Arguments:

    instanceHandle - open registry key for this controller
    pIrqMask        - pointer to variable to receive irq mask

Return value:

    none

--*/
{
    ULONG               irqMask, cachedIrqMask = 0;
    UNICODE_STRING  KeyName;
    NTSTATUS            status;
    UCHAR               buffer[sizeof(KEY_VALUE_PARTIAL_INFORMATION) + sizeof(ULONG)];
    PKEY_VALUE_PARTIAL_INFORMATION value = (PKEY_VALUE_PARTIAL_INFORMATION) buffer;
    ULONG               length;
    HANDLE              instanceHandle;
    ULONG               detectedIrqMask;

    PAGED_CODE();

    if (globalOverrideIrqMask) {

        irqMask = globalOverrideIrqMask;

    } else {

        detectedIrqMask = PcmciaGetDetectedFdoIrqMask(FdoExtension);

        status = STATUS_UNSUCCESSFUL;

        if (FdoExtension->Pdo) {
            status = IoOpenDeviceRegistryKey(FdoExtension->Pdo,
                                             PLUGPLAY_REGKEY_DRIVER,
                                             KEY_READ,
                                             &instanceHandle
                                             );
        }

        if (NT_SUCCESS(status)) {
            //
            // Here we cache the value, and accumulate bits so that
            // our mask improves with time.
            //
            RtlInitUnicodeString(&KeyName, PCMCIA_REGISTRY_CACHED_IRQMASK);

            if (pcmciaIsaIrqRescanComplete) {
                status =  ZwQueryValueKey(instanceHandle,
                                          &KeyName,
                                          KeyValuePartialInformation,
                                          value,
                                          sizeof(buffer),
                                          &length);


                if (NT_SUCCESS(status)) {
                    cachedIrqMask = *(PULONG)(value->Data);
                }
            }

            irqMask = detectedIrqMask | cachedIrqMask;

            if ((cachedIrqMask != irqMask) || !pcmciaIsaIrqRescanComplete) {
                //
                // something changed, update the cached value
                //
                ZwSetValueKey(instanceHandle, &KeyName, 0, REG_DWORD, &irqMask, sizeof(irqMask));
            }

            ZwClose(instanceHandle);
        } else {
            //
            // Hmmm, no key. Can't cache the value
            //
            irqMask = detectedIrqMask;
        }

        if (pcmciaDisableIsaPciRouting && (PcmciaCountOnes(irqMask) < 2)) {
            //
            // Perhaps irq detection is broken... fall back on old NT4 behavior
            //
            irqMask = 0;
        }
    }

    irqMask &= ~globalFilterIrqMask;

    DebugPrint((PCMCIA_DEBUG_INFO, "IrqMask %08x (ovr %08x, flt %08x, det %08x, cache %08x)\n",
                          irqMask, globalOverrideIrqMask, globalFilterIrqMask, detectedIrqMask, cachedIrqMask));

    FdoExtension->DetectedIrqMask = (USHORT)irqMask;
}


VOID
PcmciaGetRegistryContextRange(
    IN HANDLE instanceHandle,
    IN PCWSTR Name,
    IN OPTIONAL const PCMCIA_CONTEXT_RANGE IncludeRange[],
    IN OPTIONAL const PCMCIA_CONTEXT_RANGE ExcludeRange[],
    OUT PPCMCIA_CONTEXT pContext
    )
/*++

Routine Description:

    This routine returns a buffer containing the contents of the
    data which set by the controller's inf definition (AddReg). The value
    is in CurrentControlSet\Control\Class\{GUID}\{Instance}.

Arguments:

    FdoExtension - The fdo extension corresponding to the PCMCIA controller
    Name         - The name of the value in the registry
    IncludeRange - defines areas in the range that must be included
    ExcludeRange - defines areas in the range that must be excluded

Return value:

    Status

--*/
{
#define PCMCIA_MAX_CONTEXT_ENTRIES 128
#define MAX_RANGE_OFFSET 256

    NTSTATUS            status;
    UNICODE_STRING  unicodeKeyName;
    UCHAR               buffer[sizeof(KEY_VALUE_PARTIAL_INFORMATION) +
                                    PCMCIA_MAX_CONTEXT_ENTRIES*sizeof(PCMCIA_CONTEXT_RANGE)];
    PKEY_VALUE_PARTIAL_INFORMATION value = (PKEY_VALUE_PARTIAL_INFORMATION) buffer;
    UCHAR               rangeMap[MAX_RANGE_OFFSET] = {0};
    PPCMCIA_CONTEXT_RANGE newRange;
    LONG                    rangeCount;
    ULONG               rangeLength;
    ULONG               bufferLength;
    UCHAR               lastEntry;
    ULONG               keyLength;
    USHORT              i, j;
    USHORT              startOffset, endOffset;

    PAGED_CODE();

    //
    // Initialize the range map with the minimum range
    //

    if (IncludeRange) {
        for (i = 0; IncludeRange[i].wLen != 0; i++) {

            startOffset = IncludeRange[i].wOffset;
            endOffset   = IncludeRange[i].wOffset + IncludeRange[i].wLen - 1;

            if ((startOffset >= MAX_RANGE_OFFSET) ||
                 (endOffset >= MAX_RANGE_OFFSET)) {
                continue;
            }

            for (j = startOffset; j <= endOffset; j++) {
                rangeMap[j] = 0xff;
            }
        }
    }


    if (instanceHandle) {
        RtlInitUnicodeString(&unicodeKeyName, Name);

        status =  ZwQueryValueKey(instanceHandle,
                                  &unicodeKeyName,
                                  KeyValuePartialInformation,
                                  value,
                                  sizeof(buffer),
                                  &keyLength);


        if (NT_SUCCESS(status)) {

            //
            // Merge in the range specified in the registry
            //
            newRange = (PPCMCIA_CONTEXT_RANGE) value->Data;
            for (i = 0; i < value->DataLength/sizeof(PCMCIA_CONTEXT_RANGE); i++) {

                startOffset = newRange[i].wOffset;
                endOffset   = newRange[i].wOffset + newRange[i].wLen - 1;

                if ((startOffset >= MAX_RANGE_OFFSET) ||
                     (endOffset >= MAX_RANGE_OFFSET)) {
                    continue;
                }

                for (j = startOffset; j <= endOffset; j++) {
                    rangeMap[j] = 0xff;
                }
            }

        }
    }

    //
    // Filter out registers defined in the exclude range
    //

    if (ExcludeRange) {
        for (i = 0; ExcludeRange[i].wLen != 0; i++) {

            startOffset = ExcludeRange[i].wOffset;
            endOffset   = ExcludeRange[i].wOffset + ExcludeRange[i].wLen - 1;

            if ((startOffset >= MAX_RANGE_OFFSET) ||
                 (endOffset >= MAX_RANGE_OFFSET)) {
                continue;
            }

            for (j = startOffset; j <= endOffset; j++) {
                rangeMap[j] = 0;
            }
        }
    }


    //
    // Now build the resulting merged range in the buffer on the
    // stack, and figure out how big it is.
    //
    newRange = (PPCMCIA_CONTEXT_RANGE) buffer;
    rangeCount = -1;
    bufferLength = 0;
    lastEntry = 0;

    for (i = 0; i < MAX_RANGE_OFFSET; i++) {

        if (rangeMap[i]) {
            bufferLength++;
            if (lastEntry) {
                //
                // This new byte belongs to the current range
                //
                newRange[rangeCount].wLen++;
            } else {
                //
                // Starting a new range
                //
                if (rangeCount == (PCMCIA_MAX_CONTEXT_ENTRIES - 1)) {
                    break;
                }
                rangeCount++;
                newRange[rangeCount].wOffset = i;
                newRange[rangeCount].wLen = 1;
            }

        }
        lastEntry = rangeMap[i];
    }
    rangeCount++;

    pContext->Range = NULL;
    pContext->RangeCount = 0;

    if (rangeCount) {
        //
        // Length of data
        //
        rangeLength = rangeCount*sizeof(PCMCIA_CONTEXT_RANGE);

        pContext->Range = ExAllocatePool(NonPagedPool, rangeLength);

        if (pContext->Range != NULL) {
            RtlCopyMemory(pContext->Range, buffer, rangeLength);
            pContext->RangeCount = (ULONG)rangeCount;
            pContext->BufferLength = bufferLength;

            //
            // Find the length of the longest individual range
            //
            pContext->MaxLen = 0;
            for (i = 0; i < rangeCount; i++) {
                if (pContext->Range[i].wLen > pContext->MaxLen) {
                    pContext->MaxLen = pContext->Range[i].wLen;
                }
            }
        } else {
            ASSERT(pContext->Range != NULL);
        }
    }
}


NTSTATUS
PcmciaGetLegacyDetectedControllerType(
    IN PDEVICE_OBJECT Pdo,
    IN OUT PPCMCIA_CONTROLLER_TYPE ControllerType
    )
/*++

Routine Description:

    This routine returns the previously remembered controller type
    for the supplied pcmcia controller by poking in the registry
    at the appropriate places

Arguments:

    Pdo - The Physical device object corresponding to the PCMCIA controller
    ControllerType - pointer to the object in which the controller type will
                            be returned


Return value:

    Status

--*/
{
    NTSTATUS status;
    OBJECT_ATTRIBUTES objectAttributes;
    UNICODE_STRING  unicodeKeyName;
    HANDLE              instanceHandle=NULL;
    HANDLE              parametersHandle = NULL;
    RTL_QUERY_REGISTRY_TABLE queryTable[3];
    ULONG controllerType;
    ULONG invalid = 0xffffffff;


    PAGED_CODE();

    try {
        status = IoOpenDeviceRegistryKey(Pdo,
                                         PLUGPLAY_REGKEY_DEVICE,
                                         KEY_READ,
                                         &instanceHandle
                                         );
        if (!NT_SUCCESS(status)) {
            leave;
        }

        RtlInitUnicodeString(&unicodeKeyName, PCMCIA_REGISTRY_DETECTED_DEVICE_KEY);
        InitializeObjectAttributes(
                                   &objectAttributes,
                                   &unicodeKeyName,
                                   OBJ_CASE_INSENSITIVE,
                                   instanceHandle,
                                   NULL);

        status = ZwOpenKey(&parametersHandle,
                           KEY_READ,
                           &objectAttributes);

        if (!NT_SUCCESS(status)) {
            leave;
        }


        RtlZeroMemory(queryTable, sizeof(queryTable));

        queryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT;
        queryTable[0].Name = L"ControllerType";
        queryTable[0].EntryContext = &controllerType;
        queryTable[0].DefaultType = REG_DWORD;
        queryTable[0].DefaultData = &invalid;
        queryTable[0].DefaultLength = sizeof(ULONG);

        status = RtlQueryRegistryValues(RTL_REGISTRY_HANDLE,
                                        (PWSTR) parametersHandle,
                                        queryTable,
                                        NULL,
                                        NULL);

        if (!NT_SUCCESS(status)) {
            leave;
        }

        if (controllerType == invalid) {
            *ControllerType = PcmciaIntelCompatible;
        } else {
            *ControllerType = (PCMCIA_CONTROLLER_TYPE) controllerType;
        }

    } finally {

        if (instanceHandle != NULL) {
            ZwClose(instanceHandle);
        }

        if (parametersHandle != NULL) {
            ZwClose(parametersHandle);
        }
    }

    return status;
}


NTSTATUS
PcmciaSetLegacyDetectedControllerType(
    IN PDEVICE_OBJECT Pdo,
    IN PCMCIA_CONTROLLER_TYPE ControllerType
    )
/*++

Routine Description:

    This routine 'remembers' - by setting a value in the registry -
    the type of the    pcmcia controller that has been legacy detected
    to be retrieved and used in subsequent boots - if legacy re-detection
    of the controller is not performed

Arguments:

    Pdo - The Physical device object corresponding to the PCMCIA controller
    DeviceExtension -  Device extension of the fdo corresponding to the
                              controller

Return value:

    Status

--*/
{
    HANDLE                  instanceHandle;
    NTSTATUS                status;
    OBJECT_ATTRIBUTES   objectAttributes;
    HANDLE                  parametersHandle;
    UNICODE_STRING      unicodeString;

    PAGED_CODE();

    //
    // Get a handle to the registry devnode for this pdo
    //

    status = IoOpenDeviceRegistryKey(Pdo,
                                     PLUGPLAY_REGKEY_DEVICE,
                                     KEY_CREATE_SUB_KEY,
                                     &instanceHandle);

    if (!NT_SUCCESS(status)) {
        return status;
    }


    //
    // Open or create a sub-key for this devnode to store
    // the information in
    //

    RtlInitUnicodeString(&unicodeString, PCMCIA_REGISTRY_DETECTED_DEVICE_KEY);

    InitializeObjectAttributes(&objectAttributes,
                               &unicodeString,
                               OBJ_CASE_INSENSITIVE,
                               instanceHandle,
                               NULL);

    status = ZwCreateKey(&parametersHandle,
                         KEY_SET_VALUE,
                         &objectAttributes,
                         0,
                         NULL,
                         REG_OPTION_NON_VOLATILE,
                         NULL);

    if (!NT_SUCCESS(status)) {
        ZwClose(instanceHandle);
        return status;
    }
    //
    // Set the controller type value in the registry
    //
    RtlInitUnicodeString(&unicodeString, L"ControllerType");
    status = ZwSetValueKey(parametersHandle,
                           &unicodeString,
                           0,
                           REG_DWORD,
                           &ControllerType,
                           sizeof(ControllerType));
    ZwClose(parametersHandle);
    ZwClose(instanceHandle);
    return status;
}