diff options
Diffstat (limited to 'PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridge.c')
| -rw-r--r-- | PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridge.c | 395 |
1 files changed, 259 insertions, 136 deletions
diff --git a/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridge.c b/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridge.c index c879057846..c2f04ec807 100644 --- a/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridge.c +++ b/PcAtChipsetPkg/PciHostBridgeDxe/PciHostBridge.c @@ -1,15 +1,14 @@ /** @file
- Pci Host Bridge driver:
Provides the basic interfaces to abstract a PCI Host Bridge Resource Allocation
- Copyright (c) 2008 - 2009, Intel Corporation<BR> All rights
- reserved. This program and the accompanying materials are
- licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved. <BR>
+This program and the accompanying materials are
+licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
@@ -79,26 +78,22 @@ PCI_HOST_BRIDGE_INSTANCE mPciHostBridgeInstanceTemplate = { //
// Implementation
//
+/**
+ Entry point of this driver
+
+ @param ImageHandle Handle of driver image
+ @param SystemTable Point to EFI_SYSTEM_TABLE
+
+ @retval EFI_OUT_OF_RESOURCES Can not allocate memory resource
+ @retval EFI_DEVICE_ERROR Can not install the protocol instance
+ @retval EFI_SUCCESS Success to initialize the Pci host bridge.
+**/
EFI_STATUS
EFIAPI
InitializePciHostBridge (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
-/*++
-
-Routine Description:
- Entry point of this driver
-
-Arguments:
-
- ImageHandle -
-
- SystemTable -
-
-Returns:
-
---*/
{
EFI_STATUS Status;
UINTN Loop1;
@@ -194,24 +189,76 @@ Returns: }
+/**
+ These are the notifications from the PCI bus driver that it is about to enter a certain
+ phase of the PCI enumeration process.
+
+ This member function can be used to notify the host bridge driver to perform specific actions,
+ including any chipset-specific initialization, so that the chipset is ready to enter the next phase.
+ Eight notification points are defined at this time. See belows:
+ EfiPciHostBridgeBeginEnumeration Resets the host bridge PCI apertures and internal data
+ structures. The PCI enumerator should issue this notification
+ before starting a fresh enumeration process. Enumeration cannot
+ be restarted after sending any other notification such as
+ EfiPciHostBridgeBeginBusAllocation.
+ EfiPciHostBridgeBeginBusAllocation The bus allocation phase is about to begin. No specific action is
+ required here. This notification can be used to perform any
+ chipset-specific programming.
+ EfiPciHostBridgeEndBusAllocation The bus allocation and bus programming phase is complete. No
+ specific action is required here. This notification can be used to
+ perform any chipset-specific programming.
+ EfiPciHostBridgeBeginResourceAllocation
+ The resource allocation phase is about to begin. No specific
+ action is required here. This notification can be used to perform
+ any chipset-specific programming.
+ EfiPciHostBridgeAllocateResources Allocates resources per previously submitted requests for all the PCI
+ root bridges. These resource settings are returned on the next call to
+ GetProposedResources(). Before calling NotifyPhase() with a Phase of
+ EfiPciHostBridgeAllocateResource, the PCI bus enumerator is responsible
+ for gathering I/O and memory requests for
+ all the PCI root bridges and submitting these requests using
+ SubmitResources(). This function pads the resource amount
+ to suit the root bridge hardware, takes care of dependencies between
+ the PCI root bridges, and calls the Global Coherency Domain (GCD)
+ with the allocation request. In the case of padding, the allocated range
+ could be bigger than what was requested.
+ EfiPciHostBridgeSetResources Programs the host bridge hardware to decode previously allocated
+ resources (proposed resources) for all the PCI root bridges. After the
+ hardware is programmed, reassigning resources will not be supported.
+ The bus settings are not affected.
+ EfiPciHostBridgeFreeResources Deallocates resources that were previously allocated for all the PCI
+ root bridges and resets the I/O and memory apertures to their initial
+ state. The bus settings are not affected. If the request to allocate
+ resources fails, the PCI enumerator can use this notification to
+ deallocate previous resources, adjust the requests, and retry
+ allocation.
+ EfiPciHostBridgeEndResourceAllocation The resource allocation phase is completed. No specific action is
+ required here. This notification can be used to perform any chipsetspecific
+ programming.
+
+ @param[in] PciResAlloc The instance pointer of EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL
+ @param[in] Phase The phase during enumeration
+
+ @retval EFI_NOT_READY This phase cannot be entered at this time. For example, this error
+ is valid for a Phase of EfiPciHostBridgeAllocateResources if
+ SubmitResources() has not been called for one or more
+ PCI root bridges before this call
+ @retval EFI_DEVICE_ERROR Programming failed due to a hardware error. This error is valid
+ for a Phase of EfiPciHostBridgeSetResources.
+ @retval EFI_INVALID_PARAMETER Invalid phase parameter
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
+ This error is valid for a Phase of EfiPciHostBridgeAllocateResources if the
+ previously submitted resource requests cannot be fulfilled or
+ were only partially fulfilled.
+ @retval EFI_SUCCESS The notification was accepted without any errors.
+
+**/
EFI_STATUS
EFIAPI
NotifyPhase(
IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *This,
IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PHASE Phase
)
-/*++
-
-Routine Description:
- Enter a certain phase of the PCI enumeration process
-
-Arguments:
- This -- The EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL instance
- Phase -- The phase during enumeration
-
-Returns:
-
---*/
{
PCI_HOST_BRIDGE_INSTANCE *HostBridgeInstance;
PCI_ROOT_BRIDGE_INSTANCE *RootBridgeInstance;
@@ -460,28 +507,34 @@ Returns: return EFI_SUCCESS;
}
+/**
+ Return the device handle of the next PCI root bridge that is associated with this Host Bridge.
+
+ This function is called multiple times to retrieve the device handles of all the PCI root bridges that
+ are associated with this PCI host bridge. Each PCI host bridge is associated with one or more PCI
+ root bridges. On each call, the handle that was returned by the previous call is passed into the
+ interface, and on output the interface returns the device handle of the next PCI root bridge. The
+ caller can use the handle to obtain the instance of the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
+ for that root bridge. When there are no more PCI root bridges to report, the interface returns
+ EFI_NOT_FOUND. A PCI enumerator must enumerate the PCI root bridges in the order that they
+ are returned by this function.
+ For D945 implementation, there is only one root bridge in PCI host bridge.
+
+ @param[in] This The instance pointer of EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL
+ @param[in][out] RootBridgeHandle Returns the device handle of the next PCI root bridge.
+
+ @retval EFI_SUCCESS If parameter RootBridgeHandle = NULL, then return the first Rootbridge handle of the
+ specific Host bridge and return EFI_SUCCESS.
+ @retval EFI_NOT_FOUND Can not find the any more root bridge in specific host bridge.
+ @retval EFI_INVALID_PARAMETER RootBridgeHandle is not an EFI_HANDLE that was
+ returned on a previous call to GetNextRootBridge().
+**/
EFI_STATUS
EFIAPI
GetNextRootBridge(
IN EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL *This,
IN OUT EFI_HANDLE *RootBridgeHandle
)
-/*++
-
-Routine Description:
- Return the device handle of the next PCI root bridge that is associated with
- this Host Bridge
-
-Arguments:
- This -- The EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_ PROTOCOL instance
- RootBridgeHandle -- Returns the device handle of the next PCI Root Bridge.
- On input, it holds the RootBridgeHandle returned by the most
- recent call to GetNextRootBridge().The handle for the first
- PCI Root Bridge is returned if RootBridgeHandle is NULL on input
-
-Returns:
-
---*/
{
BOOLEAN NoRootBridge;
LIST_ENTRY *List;
@@ -528,6 +581,44 @@ Returns: }
}
+/**
+ Returns the allocation attributes of a PCI root bridge.
+
+ The function returns the allocation attributes of a specific PCI root bridge. The attributes can vary
+ from one PCI root bridge to another. These attributes are different from the decode-related
+ attributes that are returned by the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.GetAttributes() member function. The
+ RootBridgeHandle parameter is used to specify the instance of the PCI root bridge. The device
+ handles of all the root bridges that are associated with this host bridge must be obtained by calling
+ GetNextRootBridge(). The attributes are static in the sense that they do not change during or
+ after the enumeration process. The hardware may provide mechanisms to change the attributes on
+ the fly, but such changes must be completed before EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL is
+ installed. The permitted values of EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_ATTRIBUTES are defined in
+ "Related Definitions" below. The caller uses these attributes to combine multiple resource requests.
+ For example, if the flag EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM is set, the PCI bus enumerator needs to
+ include requests for the prefetchable memory in the nonprefetchable memory pool and not request any
+ prefetchable memory.
+ Attribute Description
+ ------------------------------------ ----------------------------------------------------------------------
+ EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM If this bit is set, then the PCI root bridge does not support separate
+ windows for nonprefetchable and prefetchable memory. A PCI bus
+ driver needs to include requests for prefetchable memory in the
+ nonprefetchable memory pool.
+
+ EFI_PCI_HOST_BRIDGE_MEM64_DECODE If this bit is set, then the PCI root bridge supports 64-bit memory
+ windows. If this bit is not set, the PCI bus driver needs to include
+ requests for a 64-bit memory address in the corresponding 32-bit
+ memory pool.
+
+ @param[in] This The instance pointer of EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL
+ @param[in] RootBridgeHandle The device handle of the PCI root bridge in which the caller is interested. Type
+ EFI_HANDLE is defined in InstallProtocolInterface() in the UEFI 2.0 Specification.
+ @param[out] Attributes The pointer to attribte of root bridge, it is output parameter
+
+ @retval EFI_INVALID_PARAMETER Attribute pointer is NULL
+ @retval EFI_INVALID_PARAMETER RootBridgehandle is invalid.
+ @retval EFI_SUCCESS Success to get attribute of interested root bridge.
+
+**/
EFI_STATUS
EFIAPI
GetAttributes(
@@ -535,20 +626,6 @@ GetAttributes( IN EFI_HANDLE RootBridgeHandle,
OUT UINT64 *Attributes
)
-/*++
-
-Routine Description:
- Returns the attributes of a PCI Root Bridge.
-
-Arguments:
- This -- The EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_ PROTOCOL instance
- RootBridgeHandle -- The device handle of the PCI Root Bridge
- that the caller is interested in
- Attribute -- The pointer to attributes of the PCI Root Bridge
-
-Returns:
-
---*/
{
LIST_ENTRY *List;
PCI_HOST_BRIDGE_INSTANCE *HostBridgeInstance;
@@ -577,6 +654,21 @@ Returns: return EFI_INVALID_PARAMETER;
}
+/**
+ Sets up the specified PCI root bridge for the bus enumeration process.
+
+ This member function sets up the root bridge for bus enumeration and returns the PCI bus range
+ over which the search should be performed in ACPI 2.0 resource descriptor format.
+
+ @param[in] This The EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_ PROTOCOL instance.
+ @param[in] RootBridgeHandle The PCI Root Bridge to be set up.
+ @param[out] Configuration Pointer to the pointer to the PCI bus resource descriptor.
+
+ @retval EFI_INVALID_PARAMETER Invalid Root bridge's handle
+ @retval EFI_OUT_OF_RESOURCES Fail to allocate ACPI resource descriptor tag.
+ @retval EFI_SUCCESS Sucess to allocate ACPI resource descriptor.
+
+**/
EFI_STATUS
EFIAPI
StartBusEnumeration(
@@ -584,20 +676,6 @@ StartBusEnumeration( IN EFI_HANDLE RootBridgeHandle,
OUT VOID **Configuration
)
-/*++
-
-Routine Description:
- This is the request from the PCI enumerator to set up
- the specified PCI Root Bridge for bus enumeration process.
-
-Arguments:
- This -- The EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_ PROTOCOL instance
- RootBridgeHandle -- The PCI Root Bridge to be set up
- Configuration -- Pointer to the pointer to the PCI bus resource descriptor
-
-Returns:
-
---*/
{
LIST_ENTRY *List;
PCI_HOST_BRIDGE_INSTANCE *HostBridgeInstance;
@@ -653,6 +731,30 @@ Returns: return EFI_INVALID_PARAMETER;
}
+/**
+ Programs the PCI root bridge hardware so that it decodes the specified PCI bus range.
+
+ This member function programs the specified PCI root bridge to decode the bus range that is
+ specified by the input parameter Configuration.
+ The bus range information is specified in terms of the ACPI 2.0 resource descriptor format.
+
+ @param[in] This The EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_ PROTOCOL instance
+ @param[in] RootBridgeHandle The PCI Root Bridge whose bus range is to be programmed
+ @param[in] Configuration The pointer to the PCI bus resource descriptor
+
+ @retval EFI_INVALID_PARAMETER RootBridgeHandle is not a valid root bridge handle.
+ @retval EFI_INVALID_PARAMETER Configuration is NULL.
+ @retval EFI_INVALID_PARAMETER Configuration does not point to a valid ACPI 2.0 resource descriptor.
+ @retval EFI_INVALID_PARAMETER Configuration does not include a valid ACPI 2.0 bus resource descriptor.
+ @retval EFI_INVALID_PARAMETER Configuration includes valid ACPI 2.0 resource descriptors other than
+ bus descriptors.
+ @retval EFI_INVALID_PARAMETER Configuration contains one or more invalid ACPI resource descriptors.
+ @retval EFI_INVALID_PARAMETER "Address Range Minimum" is invalid for this root bridge.
+ @retval EFI_INVALID_PARAMETER "Address Range Length" is invalid for this root bridge.
+ @retval EFI_DEVICE_ERROR Programming failed due to a hardware error.
+ @retval EFI_SUCCESS The bus range for the PCI root bridge was programmed.
+
+**/
EFI_STATUS
EFIAPI
SetBusNumbers(
@@ -660,20 +762,6 @@ SetBusNumbers( IN EFI_HANDLE RootBridgeHandle,
IN VOID *Configuration
)
-/*++
-
-Routine Description:
- This function programs the PCI Root Bridge hardware so that
- it decodes the specified PCI bus range
-
-Arguments:
- This -- The EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_ PROTOCOL instance
- RootBridgeHandle -- The PCI Root Bridge whose bus range is to be programmed
- Configuration -- The pointer to the PCI bus resource descriptor
-
-Returns:
-
---*/
{
LIST_ENTRY *List;
PCI_HOST_BRIDGE_INSTANCE *HostBridgeInstance;
@@ -746,6 +834,31 @@ Returns: }
+/**
+ Submits the I/O and memory resource requirements for the specified PCI root bridge.
+
+ This function is used to submit all the I/O and memory resources that are required by the specified
+ PCI root bridge. The input parameter Configuration is used to specify the following:
+ - The various types of resources that are required
+ - The associated lengths in terms of ACPI 2.0 resource descriptor format
+
+ @param[in] This Pointer to the EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL instance.
+ @param[in] RootBridgeHandle The PCI root bridge whose I/O and memory resource requirements are being submitted.
+ @param[in] Configuration The pointer to the PCI I/O and PCI memory resource descriptor.
+
+ @retval EFI_SUCCESS The I/O and memory resource requests for a PCI root bridge were accepted.
+ @retval EFI_INVALID_PARAMETER RootBridgeHandle is not a valid root bridge handle.
+ @retval EFI_INVALID_PARAMETER Configuration is NULL.
+ @retval EFI_INVALID_PARAMETER Configuration does not point to a valid ACPI 2.0 resource descriptor.
+ @retval EFI_INVALID_PARAMETER Configuration includes requests for one or more resource types that are
+ not supported by this PCI root bridge. This error will happen if the caller
+ did not combine resources according to Attributes that were returned by
+ GetAllocAttributes().
+ @retval EFI_INVALID_PARAMETER Address Range Maximum" is invalid.
+ @retval EFI_INVALID_PARAMETER "Address Range Length" is invalid for this PCI root bridge.
+ @retval EFI_INVALID_PARAMETER "Address Space Granularity" is invalid for this PCI root bridge.
+
+**/
EFI_STATUS
EFIAPI
SubmitResources(
@@ -753,19 +866,6 @@ SubmitResources( IN EFI_HANDLE RootBridgeHandle,
IN VOID *Configuration
)
-/*++
-
-Routine Description:
- Submits the I/O and memory resource requirements for the specified PCI Root Bridge
-
-Arguments:
- This -- The EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_ PROTOCOL instance
- RootBridgeHandle -- The PCI Root Bridge whose I/O and memory resource requirements
- are being submitted
- Configuration -- The pointer to the PCI I/O and PCI memory resource descriptor
-Returns:
-
---*/
{
LIST_ENTRY *List;
PCI_HOST_BRIDGE_INSTANCE *HostBridgeInstance;
@@ -883,6 +983,26 @@ Returns: return EFI_INVALID_PARAMETER;
}
+/**
+ Returns the proposed resource settings for the specified PCI root bridge.
+
+ This member function returns the proposed resource settings for the specified PCI root bridge. The
+ proposed resource settings are prepared when NotifyPhase() is called with a Phase of
+ EfiPciHostBridgeAllocateResources. The output parameter Configuration
+ specifies the following:
+ - The various types of resources, excluding bus resources, that are allocated
+ - The associated lengths in terms of ACPI 2.0 resource descriptor format
+
+ @param[in] This Pointer to the EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL instance.
+ @param[in] RootBridgeHandle The PCI root bridge handle. Type EFI_HANDLE is defined in InstallProtocolInterface() in the UEFI 2.0 Specification.
+ @param[out] Configuration The pointer to the pointer to the PCI I/O and memory resource descriptor.
+
+ @retval EFI_SUCCESS The requested parameters were returned.
+ @retval EFI_INVALID_PARAMETER RootBridgeHandle is not a valid root bridge handle.
+ @retval EFI_DEVICE_ERROR Programming failed due to a hardware error.
+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
+
+**/
EFI_STATUS
EFIAPI
GetProposedResources(
@@ -890,21 +1010,6 @@ GetProposedResources( IN EFI_HANDLE RootBridgeHandle,
OUT VOID **Configuration
)
-/*++
-
-Routine Description:
- This function returns the proposed resource settings for the specified
- PCI Root Bridge
-
-Arguments:
- This -- The EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_ PROTOCOL instance
- RootBridgeHandle -- The PCI Root Bridge handle
- Configuration -- The pointer to the pointer to the PCI I/O
- and memory resource descriptor
-
-Returns:
-
---*/
{
LIST_ENTRY *List;
PCI_HOST_BRIDGE_INSTANCE *HostBridgeInstance;
@@ -1053,6 +1158,12 @@ Returns: return EFI_INVALID_PARAMETER;
}
+/**
+ Update attribute for PCI root bridge for specifc device.
+
+ @param RootBridge Point to PCI root bridge.
+ @param PciAddress The specific device PCI address
+**/
STATIC
VOID
UpdateRootBridgeAttributes (
@@ -1151,6 +1262,33 @@ UpdateRootBridgeAttributes ( RootBridge->Supports = Attributes;
}
+/**
+ Provides the hooks from the PCI bus driver to every PCI controller (device/function) at various
+ stages of the PCI enumeration process that allow the host bridge driver to preinitialize individual
+ PCI controllers before enumeration.
+
+ This function is called during the PCI enumeration process. No specific action is expected from this
+ member function. It allows the host bridge driver to preinitialize individual PCI controllers before
+ enumeration.
+
+ @param This Pointer to the EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_PROTOCOL instance.
+ @param RootBridgeHandle The associated PCI root bridge handle. Type EFI_HANDLE is defined in
+ InstallProtocolInterface() in the UEFI 2.0 Specification.
+ @param PciAddress The address of the PCI device on the PCI bus. This address can be passed to the
+ EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL member functions to access the PCI
+ configuration space of the device. See Table 12-1 in the UEFI 2.0 Specification for
+ the definition of EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_PCI_ADDRESS.
+ @param Phase The phase of the PCI device enumeration.
+
+ @retval EFI_SUCCESS The requested parameters were returned.
+ @retval EFI_INVALID_PARAMETER RootBridgeHandle is not a valid root bridge handle.
+ @retval EFI_INVALID_PARAMETER Phase is not a valid phase that is defined in
+ EFI_PCI_CONTROLLER_RESOURCE_ALLOCATION_PHASE.
+ @retval EFI_DEVICE_ERROR Programming failed due to a hardware error. The PCI enumerator should
+ not enumerate this device, including its child devices if it is a PCI-to-PCI
+ bridge.
+
+**/
EFI_STATUS
EFIAPI
PreprocessController (
@@ -1159,21 +1297,6 @@ PreprocessController ( IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_PCI_ADDRESS PciAddress,
IN EFI_PCI_CONTROLLER_RESOURCE_ALLOCATION_PHASE Phase
)
-/*++
-
-Routine Description:
- This function is called for all the PCI controllers that the PCI
- bus driver finds. Can be used to Preprogram the controller.
-
-Arguments:
- This -- The EFI_PCI_HOST_BRIDGE_RESOURCE_ALLOCATION_ PROTOCOL instance
- RootBridgeHandle -- The PCI Root Bridge handle
- PciBusAddress -- Address of the controller on the PCI bus
- Phase -- The Phase during resource allocation
-
-Returns:
- EFI_SUCCESS
---*/
{
PCI_HOST_BRIDGE_INSTANCE *HostBridgeInstance;
PCI_ROOT_BRIDGE_INSTANCE *RootBridgeInstance;
|