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path: root/EDK/Foundation/Core/Dxe/Hand/handle.c
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-rw-r--r--EDK/Foundation/Core/Dxe/Hand/handle.c1716
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diff --git a/EDK/Foundation/Core/Dxe/Hand/handle.c b/EDK/Foundation/Core/Dxe/Hand/handle.c
new file mode 100644
index 0000000..45874b4
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+++ b/EDK/Foundation/Core/Dxe/Hand/handle.c
@@ -0,0 +1,1716 @@
+/*++
+
+Copyright (c) 2004, Intel Corporation
+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.
+
+Module Name:
+
+ handle.c
+
+Abstract:
+
+ EFI handle & protocol handling
+
+
+
+Revision History
+
+--*/
+
+#include "hand.h"
+#include EFI_PROTOCOL_DEFINITION (DevicePath)
+#include EFI_PROTOCOL_DEFINITION (LoadedImage)
+#include EFI_PROTOCOL_DEFINITION (DebugMask)
+
+//
+// mProtocolDatabase - A list of all protocols in the system. (simple list for now)
+// gHandleList - A list of all the handles in the system
+// gProtocolDatabaseLock - Lock to protect the mProtocolDatabase
+// gHandleDatabaseKey - The Key to show that the handle has been created/modified
+//
+static EFI_LIST_ENTRY mProtocolDatabase = INITIALIZE_LIST_HEAD_VARIABLE (mProtocolDatabase);
+EFI_LIST_ENTRY gHandleList = INITIALIZE_LIST_HEAD_VARIABLE (gHandleList);
+EFI_LOCK gProtocolDatabaseLock = EFI_INITIALIZE_LOCK_VARIABLE (EFI_TPL_NOTIFY);
+UINT64 gHandleDatabaseKey = 0;
+
+
+VOID
+CoreAcquireProtocolLock (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ Acquire lock on gProtocolDatabaseLock.
+
+Arguments:
+
+ None
+
+Returns:
+
+ None
+
+--*/
+{
+ CoreAcquireLock (&gProtocolDatabaseLock);
+}
+
+
+VOID
+CoreReleaseProtocolLock (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ Release lock on gProtocolDatabaseLock.
+
+Arguments:
+
+ None
+
+Returns:
+
+ None
+
+--*/
+{
+ CoreReleaseLock (&gProtocolDatabaseLock);
+}
+
+
+EFI_STATUS
+CoreValidateHandle (
+ IN EFI_HANDLE UserHandle
+ )
+/*++
+
+Routine Description:
+
+ Check whether a handle is a valid EFI_HANDLE
+
+Arguments:
+
+ UserHandle - The handle to check
+
+Returns:
+
+ EFI_INVALID_PARAMETER - The handle is NULL or not a valid EFI_HANDLE.
+
+ EFI_SUCCESS - The handle is valid EFI_HANDLE.
+
+--*/
+{
+ IHANDLE *Handle;
+
+ Handle = (IHANDLE *)UserHandle;
+ if (Handle == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+ if (Handle->Signature != EFI_HANDLE_SIGNATURE) {
+ return EFI_INVALID_PARAMETER;
+ }
+ return EFI_SUCCESS;
+}
+
+
+PROTOCOL_ENTRY *
+CoreFindProtocolEntry (
+ IN EFI_GUID *Protocol,
+ IN BOOLEAN Create
+ )
+/*++
+
+Routine Description:
+
+ Finds the protocol entry for the requested protocol.
+
+ N.B. The gProtocolDatabaseLock must be owned
+
+Arguments:
+
+ Protocol - The ID of the protocol
+
+ Create - Create a new entry if not found
+
+Returns:
+
+ Protocol entry
+
+--*/
+{
+ EFI_LIST_ENTRY *Link;
+ PROTOCOL_ENTRY *Item;
+ PROTOCOL_ENTRY *ProtEntry;
+
+ ASSERT_LOCKED(&gProtocolDatabaseLock);
+
+ //
+ // Search the database for the matching GUID
+ //
+
+ ProtEntry = NULL;
+ for (Link = mProtocolDatabase.ForwardLink;
+ Link != &mProtocolDatabase;
+ Link = Link->ForwardLink) {
+
+ Item = CR(Link, PROTOCOL_ENTRY, AllEntries, PROTOCOL_ENTRY_SIGNATURE);
+ if (EfiCompareGuid (&Item->ProtocolID, Protocol)) {
+
+ //
+ // This is the protocol entry
+ //
+
+ ProtEntry = Item;
+ break;
+ }
+ }
+
+ //
+ // If the protocol entry was not found and Create is TRUE, then
+ // allocate a new entry
+ //
+ if ((ProtEntry == NULL) && Create) {
+ ProtEntry = CoreAllocateBootServicesPool (sizeof(PROTOCOL_ENTRY));
+
+ if (ProtEntry != NULL) {
+ //
+ // Initialize new protocol entry structure
+ //
+ ProtEntry->Signature = PROTOCOL_ENTRY_SIGNATURE;
+ ProtEntry->ProtocolID = *Protocol;
+ InitializeListHead (&ProtEntry->Protocols);
+ InitializeListHead (&ProtEntry->Notify);
+
+ //
+ // Add it to protocol database
+ //
+ InsertTailList (&mProtocolDatabase, &ProtEntry->AllEntries);
+ }
+ }
+
+ return ProtEntry;
+}
+
+
+PROTOCOL_INTERFACE *
+CoreFindProtocolInterface (
+ IN IHANDLE *Handle,
+ IN EFI_GUID *Protocol,
+ IN VOID *Interface
+ )
+/*++
+
+Routine Description:
+
+ Finds the protocol instance for the requested handle and protocol.
+
+ Note: This function doesn't do parameters checking, it's caller's responsibility
+ to pass in valid parameters.
+
+Arguments:
+
+ Handle - The handle to search the protocol on
+
+ Protocol - GUID of the protocol
+
+ Interface - The interface for the protocol being searched
+
+Returns:
+
+ Protocol instance (NULL: Not found)
+
+--*/
+{
+ PROTOCOL_INTERFACE *Prot;
+ PROTOCOL_ENTRY *ProtEntry;
+ EFI_LIST_ENTRY *Link;
+
+ ASSERT_LOCKED(&gProtocolDatabaseLock);
+ Prot = NULL;
+
+ //
+ // Lookup the protocol entry for this protocol ID
+ //
+
+ ProtEntry = CoreFindProtocolEntry (Protocol, FALSE);
+ if (ProtEntry != NULL) {
+
+ //
+ // Look at each protocol interface for any matches
+ //
+ for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link=Link->ForwardLink) {
+
+ //
+ // If this protocol interface matches, remove it
+ //
+ Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);
+ if (Prot->Interface == Interface && Prot->Protocol == ProtEntry) {
+ break;
+ }
+
+ Prot = NULL;
+ }
+ }
+
+ return Prot;
+}
+
+STATIC
+EFI_STATUS
+CoreUnregisterProtocolNotifyEvent (
+ IN EFI_EVENT Event
+ )
+/*++
+
+Routine Description:
+
+ Removes an event from a register protocol notify list on a protocol.
+
+Arguments:
+
+ Event - The event to search for in the protocol database.
+
+Returns:
+
+ EFI_SUCCESS if the event was found and removed.
+ EFI_NOT_FOUND if the event was not found in the protocl database.
+
+--*/
+{
+ EFI_LIST_ENTRY *Link;
+ PROTOCOL_ENTRY *ProtEntry;
+ EFI_LIST_ENTRY *NotifyLink;
+ PROTOCOL_NOTIFY *ProtNotify;
+
+ CoreAcquireProtocolLock ();
+
+ for ( Link = mProtocolDatabase.ForwardLink;
+ Link != &mProtocolDatabase;
+ Link = Link->ForwardLink) {
+
+ ProtEntry = CR(Link, PROTOCOL_ENTRY, AllEntries, PROTOCOL_ENTRY_SIGNATURE);
+
+ for ( NotifyLink = ProtEntry->Notify.ForwardLink;
+ NotifyLink != &ProtEntry->Notify;
+ NotifyLink = NotifyLink->ForwardLink) {
+
+ ProtNotify = CR(NotifyLink, PROTOCOL_NOTIFY, Link, PROTOCOL_NOTIFY_SIGNATURE);
+
+ if (ProtNotify->Event == Event) {
+ RemoveEntryList(&ProtNotify->Link);
+ CoreFreePool(ProtNotify);
+ CoreReleaseProtocolLock ();
+ return EFI_SUCCESS;
+ }
+ }
+ }
+
+ CoreReleaseProtocolLock ();
+ return EFI_NOT_FOUND;
+}
+
+
+EFI_STATUS
+CoreUnregisterProtocolNotify (
+ IN EFI_EVENT Event
+ )
+/*++
+
+Routine Description:
+
+ Removes all the events in the protocol database that match Event.
+
+Arguments:
+
+ Event - The event to search for in the protocol database.
+
+Returns:
+
+ EFI_SUCCESS when done searching the entire database.
+
+--*/
+{
+ EFI_STATUS Status;
+
+ do {
+ Status = CoreUnregisterProtocolNotifyEvent (Event);
+ } while (!EFI_ERROR (Status));
+
+ return EFI_SUCCESS;
+}
+
+
+EFI_BOOTSERVICE
+EFI_STATUS
+EFIAPI
+CoreInstallProtocolInterface (
+ IN OUT EFI_HANDLE *UserHandle,
+ IN EFI_GUID *Protocol,
+ IN EFI_INTERFACE_TYPE InterfaceType,
+ IN VOID *Interface
+ )
+/*++
+
+Routine Description:
+
+ Wrapper function to CoreInstallProtocolInterfaceNotify. This is the public API which
+ Calls the private one which contains a BOOLEAN parameter for notifications
+
+Arguments:
+
+ UserHandle - The handle to install the protocol handler on,
+ or NULL if a new handle is to be allocated
+
+ Protocol - The protocol to add to the handle
+
+ InterfaceType - Indicates whether Interface is supplied in native form.
+
+ Interface - The interface for the protocol being added
+
+Returns:
+
+ Status code
+
+--*/
+{
+ return CoreInstallProtocolInterfaceNotify (
+ UserHandle,
+ Protocol,
+ InterfaceType,
+ Interface,
+ TRUE
+ );
+}
+
+EFI_STATUS
+CoreInstallProtocolInterfaceNotify (
+ IN OUT EFI_HANDLE *UserHandle,
+ IN EFI_GUID *Protocol,
+ IN EFI_INTERFACE_TYPE InterfaceType,
+ IN VOID *Interface,
+ IN BOOLEAN Notify
+ )
+/*++
+
+Routine Description:
+
+ Installs a protocol interface into the boot services environment.
+
+Arguments:
+
+ UserHandle - The handle to install the protocol handler on,
+ or NULL if a new handle is to be allocated
+
+ Protocol - The protocol to add to the handle
+
+ InterfaceType - Indicates whether Interface is supplied in native form.
+
+ Interface - The interface for the protocol being added
+
+ Notify - indicates whether notify the notification list
+ for this protocol
+
+Returns:
+
+ EFI_INVALID_PARAMETER - Invalid parameter
+
+ EFI_OUT_OF_RESOURCES - No enough buffer to allocate
+
+ EFI_SUCCESS - Protocol interface successfully installed
+
+--*/
+{
+ PROTOCOL_INTERFACE *Prot;
+ PROTOCOL_ENTRY *ProtEntry;
+ IHANDLE *Handle;
+ EFI_STATUS Status;
+ VOID *ExistingInterface;
+
+ DEBUG_CODE (
+ UINTN ErrorLevel;
+ )
+
+ //
+ // returns EFI_INVALID_PARAMETER if InterfaceType is invalid.
+ // Also added check for invalid UserHandle and Protocol pointers.
+ //
+ if (UserHandle == NULL || Protocol == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (InterfaceType != EFI_NATIVE_INTERFACE) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Print debug message
+ //
+ DEBUG_CODE (
+ if (EfiCompareGuid (Protocol, &gEfiLoadedImageProtocolGuid) ||
+ EfiCompareGuid (Protocol, &gEfiDebugMaskProtocolGuid)) {
+ //
+ // Print these protocols only at EFI_D_INFO level, for cleaner log.
+ // They are installed for every DXE driver.
+ //
+ ErrorLevel = EFI_D_INFO;
+ } else {
+ ErrorLevel = EFI_D_ERROR;
+ }
+ DEBUG ((ErrorLevel, "InstallProtocolInterface: %g %x\n", Protocol, Interface));
+ )
+ Status = EFI_OUT_OF_RESOURCES;
+ Prot = NULL;
+ Handle = NULL;
+
+ ASSERT (NULL != gBS);
+
+ if (*UserHandle != NULL_HANDLE) {
+ Status = CoreHandleProtocol (*UserHandle, Protocol, (VOID **)&ExistingInterface);
+ if (!EFI_ERROR (Status)) {
+ return EFI_INVALID_PARAMETER;
+ }
+ }
+
+ //
+ // Lock the protocol database
+ //
+ CoreAcquireProtocolLock ();
+
+ //
+ // Lookup the Protocol Entry for the requested protocol
+ //
+ ProtEntry = CoreFindProtocolEntry (Protocol, TRUE);
+ if (ProtEntry == NULL) {
+ goto Done;
+ }
+
+ //
+ // Allocate a new protocol interface structure
+ //
+ Prot = CoreAllocateZeroBootServicesPool (sizeof(PROTOCOL_INTERFACE));
+ if (Prot == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Done;
+ }
+
+ //
+ // If caller didn't supply a handle, allocate a new one
+ //
+ Handle = (IHANDLE *)*UserHandle;
+ if (Handle == NULL) {
+ Handle = CoreAllocateZeroBootServicesPool (sizeof(IHANDLE));
+ if (Handle == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Done;
+ }
+
+ //
+ // Initialize new handler structure
+ //
+ Handle->Signature = EFI_HANDLE_SIGNATURE;
+ InitializeListHead (&Handle->Protocols);
+
+ //
+ // Initialize the Key to show that the handle has been created/modified
+ //
+ gHandleDatabaseKey++;
+ Handle->Key = gHandleDatabaseKey;
+
+ //
+ // Add this handle to the list global list of all handles
+ // in the system
+ //
+ InsertTailList (&gHandleList, &Handle->AllHandles);
+ }
+
+ Status = CoreValidateHandle (Handle);
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ //
+ // Each interface that is added must be unique
+ //
+ ASSERT (CoreFindProtocolInterface (Handle, Protocol, Interface) == NULL);
+
+ //
+ // Initialize the protocol interface structure
+ //
+ Prot->Signature = PROTOCOL_INTERFACE_SIGNATURE;
+ Prot->Handle = Handle;
+ Prot->Protocol = ProtEntry;
+ Prot->Interface = Interface;
+
+ //
+ // Initalize OpenProtocol Data base
+ //
+ InitializeListHead (&Prot->OpenList);
+ Prot->OpenListCount = 0;
+
+ //
+ // Add this protocol interface to the head of the supported
+ // protocol list for this handle
+ //
+ InsertHeadList (&Handle->Protocols, &Prot->Link);
+
+ //
+ // Add this protocol interface to the tail of the
+ // protocol entry
+ //
+ InsertTailList (&ProtEntry->Protocols, &Prot->ByProtocol);
+
+ //
+ // Notify the notification list for this protocol
+ //
+ if (Notify) {
+ CoreNotifyProtocolEntry (ProtEntry);
+ }
+ Status = EFI_SUCCESS;
+
+Done:
+ //
+ // Done, unlock the database and return
+ //
+ CoreReleaseProtocolLock ();
+ if (!EFI_ERROR (Status)) {
+ //
+ // Return the new handle back to the caller
+ //
+ *UserHandle = Handle;
+ } else {
+ //
+ // There was an error, clean up
+ //
+ if (Prot != NULL) {
+ CoreFreePool (Prot);
+ }
+ }
+
+ return Status;
+}
+
+
+EFI_BOOTSERVICE11
+EFI_STATUS
+EFIAPI
+CoreInstallMultipleProtocolInterfaces (
+ IN OUT EFI_HANDLE *Handle,
+ ...
+ )
+/*++
+
+Routine Description:
+
+ Installs a list of protocol interface into the boot services environment.
+ This function calls InstallProtocolInterface() in a loop. If any error
+ occures all the protocols added by this function are removed. This is
+ basically a lib function to save space.
+
+Arguments:
+
+ Handle - The handle to install the protocol handlers on,
+ or NULL if a new handle is to be allocated
+ ... - EFI_GUID followed by protocol instance. A NULL terminates the
+ list. The pairs are the arguments to InstallProtocolInterface().
+ All the protocols are added to Handle.
+
+Returns:
+
+ EFI_INVALID_PARAMETER - Handle is NULL.
+
+ EFI_SUCCESS - Protocol interfaces successfully installed.
+
+--*/
+{
+ VA_LIST args;
+ EFI_STATUS Status;
+ EFI_GUID *Protocol;
+ VOID *Interface;
+ EFI_TPL OldTpl;
+ UINTN Index;
+ EFI_HANDLE OldHandle;
+ EFI_HANDLE DeviceHandle;
+ EFI_DEVICE_PATH_PROTOCOL *DevicePath;
+
+ if (Handle == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Syncronize with notifcations.
+ //
+ OldTpl = CoreRaiseTpl (EFI_TPL_NOTIFY);
+ OldHandle = *Handle;
+
+ //
+ // Check for duplicate device path and install the protocol interfaces
+ //
+ VA_START (args, Handle);
+ for (Index = 0, Status = EFI_SUCCESS; !EFI_ERROR (Status); Index++) {
+ //
+ // If protocol is NULL, then it's the end of the list
+ //
+ Protocol = VA_ARG (args, EFI_GUID *);
+ if (Protocol == NULL) {
+ break;
+ }
+
+ Interface = VA_ARG (args, VOID *);
+
+ //
+ // Make sure you are installing on top a device path that has already been added.
+ //
+ if (EfiCompareGuid (Protocol, &gEfiDevicePathProtocolGuid)) {
+ DeviceHandle = NULL;
+ DevicePath = Interface;
+ Status = CoreLocateDevicePath (&gEfiDevicePathProtocolGuid, &DevicePath, &DeviceHandle);
+ if (!EFI_ERROR (Status) && (DeviceHandle != NULL_HANDLE) && IsDevicePathEnd(DevicePath)) {
+ Status = EFI_ALREADY_STARTED;
+ continue;
+ }
+ }
+
+ //
+ // Install it
+ //
+ Status = CoreInstallProtocolInterface (Handle, Protocol, EFI_NATIVE_INTERFACE, Interface);
+ }
+
+ //
+ // If there was an error, remove all the interfaces that were installed without any errors
+ //
+ if (EFI_ERROR (Status)) {
+ //
+ // Reset the va_arg back to the first argument.
+ //
+ VA_START (args, Handle);
+ for (; Index > 1; Index--) {
+ Protocol = VA_ARG (args, EFI_GUID *);
+ Interface = VA_ARG (args, VOID *);
+ CoreUninstallProtocolInterface (*Handle, Protocol, Interface);
+ }
+ *Handle = OldHandle;
+ }
+
+ //
+ // Done
+ //
+ CoreRestoreTpl (OldTpl);
+ return Status;
+}
+
+EFI_STATUS
+CoreDisconnectControllersUsingProtocolInterface (
+ IN EFI_HANDLE UserHandle,
+ IN PROTOCOL_INTERFACE *Prot
+ )
+/*++
+
+Routine Description:
+
+ Attempts to disconnect all drivers that are using the protocol interface being queried.
+ If failed, reconnect all drivers disconnected.
+
+ Note: This function doesn't do parameters checking, it's caller's responsibility
+ to pass in valid parameters.
+
+Arguments:
+
+ UserHandle - The handle on which the protocol is installed
+ Prot - The protocol to disconnect drivers from
+
+Returns:
+
+ EFI_SUCCESS - Drivers using the protocol interface are all disconnected
+ EFI_ACCESS_DENIED - Failed to disconnect one or all of the drivers
+
+--*/
+{
+ EFI_STATUS Status;
+ BOOLEAN ItemFound;
+ EFI_LIST_ENTRY *Link;
+ OPEN_PROTOCOL_DATA *OpenData;
+
+ Status = EFI_SUCCESS;
+
+ //
+ // Attempt to disconnect all drivers from this protocol interface
+ //
+ do {
+ ItemFound = FALSE;
+ for ( Link = Prot->OpenList.ForwardLink;
+ (Link != &Prot->OpenList) && !ItemFound;
+ Link = Link->ForwardLink ) {
+ OpenData = CR (Link, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
+ if (OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) {
+ ItemFound = TRUE;
+ CoreReleaseProtocolLock ();
+ Status = CoreDisconnectController (UserHandle, OpenData->AgentHandle, NULL);
+ CoreAcquireProtocolLock ();
+ if (EFI_ERROR (Status)) {
+ ItemFound = FALSE;
+ break;
+ }
+ }
+ }
+ } while (ItemFound);
+
+ if (!EFI_ERROR (Status)) {
+ //
+ // Attempt to remove BY_HANDLE_PROTOOCL and GET_PROTOCOL and TEST_PROTOCOL Open List items
+ //
+ do {
+ ItemFound = FALSE;
+ for ( Link = Prot->OpenList.ForwardLink;
+ (Link != &Prot->OpenList) && !ItemFound;
+ Link = Link->ForwardLink ) {
+ OpenData = CR (Link, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
+ if (OpenData->Attributes &
+ (EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL | EFI_OPEN_PROTOCOL_GET_PROTOCOL | EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) {
+ ItemFound = TRUE;
+ RemoveEntryList (&OpenData->Link);
+ Prot->OpenListCount--;
+ CoreFreePool (OpenData);
+ }
+ }
+ } while (ItemFound);
+ }
+
+ //
+ // If there are errors or still has open items in the list, then reconnect all the drivers and return an error
+ //
+ if (EFI_ERROR (Status) || (Prot->OpenListCount > 0)) {
+ CoreReleaseProtocolLock ();
+ CoreConnectController (UserHandle, NULL, NULL, TRUE);
+ CoreAcquireProtocolLock ();
+ Status = EFI_ACCESS_DENIED;
+ }
+
+ return Status;
+}
+
+EFI_BOOTSERVICE
+EFI_STATUS
+EFIAPI
+CoreUninstallProtocolInterface (
+ IN EFI_HANDLE UserHandle,
+ IN EFI_GUID *Protocol,
+ IN VOID *Interface
+ )
+/*++
+
+Routine Description:
+
+ Uninstalls all instances of a protocol:interfacer from a handle.
+ If the last protocol interface is remove from the handle, the
+ handle is freed.
+
+Arguments:
+
+ UserHandle - The handle to remove the protocol handler from
+
+ Protocol - The protocol, of protocol:interface, to remove
+
+ Interface - The interface, of protocol:interface, to remove
+
+Returns:
+
+ EFI_INVALID_PARAMETER - Protocol is NULL.
+
+ EFI_SUCCESS - Protocol interface successfully uninstalled.
+
+--*/
+{
+ EFI_STATUS Status;
+ IHANDLE *Handle;
+ PROTOCOL_INTERFACE *Prot;
+
+ //
+ // Check that Protocol is valid
+ //
+ if (Protocol == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Check that UserHandle is a valid handle
+ //
+ Status = CoreValidateHandle (UserHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Lock the protocol database
+ //
+ CoreAcquireProtocolLock ();
+
+ //
+ // Check that Protocol exists on UserHandle, and Interface matches the interface in the database
+ //
+ Prot = CoreFindProtocolInterface (UserHandle, Protocol, Interface);
+ if (Prot == NULL) {
+ Status = EFI_NOT_FOUND;
+ goto Done;
+ }
+
+ //
+ // Attempt to disconnect all drivers that are using the protocol interface that is about to be removed
+ //
+ Status = CoreDisconnectControllersUsingProtocolInterface (
+ UserHandle,
+ Prot
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // One or more drivers refused to release, so return the error
+ //
+ goto Done;
+ }
+
+ //
+ // Remove the protocol interface from the protocol
+ //
+ Status = EFI_NOT_FOUND;
+ Handle = (IHANDLE *)UserHandle;
+ Prot = CoreRemoveInterfaceFromProtocol (Handle, Protocol, Interface);
+
+ if (Prot != NULL) {
+ //
+ // Update the Key to show that the handle has been created/modified
+ //
+ gHandleDatabaseKey++;
+ Handle->Key = gHandleDatabaseKey;
+
+ //
+ // Remove the protocol interface from the handle
+ //
+ RemoveEntryList (&Prot->Link);
+
+ //
+ // Free the memory
+ //
+ Prot->Signature = 0;
+ CoreFreePool (Prot);
+ Status = EFI_SUCCESS;
+ }
+
+ //
+ // If there are no more handlers for the handle, free the handle
+ //
+ if (IsListEmpty (&Handle->Protocols)) {
+ Handle->Signature = 0;
+ RemoveEntryList (&Handle->AllHandles);
+ CoreFreePool (Handle);
+ }
+
+Done:
+ //
+ // Done, unlock the database and return
+ //
+ CoreReleaseProtocolLock ();
+ return Status;
+}
+
+
+EFI_BOOTSERVICE11
+EFI_STATUS
+EFIAPI
+CoreUninstallMultipleProtocolInterfaces (
+ IN EFI_HANDLE Handle,
+ ...
+ )
+/*++
+
+Routine Description:
+
+ Uninstalls a list of protocol interface in the boot services environment.
+ This function calls UnisatllProtocolInterface() in a loop. This is
+ basically a lib function to save space.
+
+Arguments:
+
+ Handle - The handle to uninstall the protocol
+
+ ... - EFI_GUID followed by protocol instance. A NULL terminates the
+ list. The pairs are the arguments to UninstallProtocolInterface().
+ All the protocols are added to Handle.
+
+Returns:
+
+ Status code
+
+--*/
+{
+ EFI_STATUS Status;
+ VA_LIST args;
+ EFI_GUID *Protocol;
+ VOID *Interface;
+ UINTN Index;
+
+ VA_START (args, Handle);
+ for (Index = 0, Status = EFI_SUCCESS; !EFI_ERROR (Status); Index++) {
+ //
+ // If protocol is NULL, then it's the end of the list
+ //
+ Protocol = VA_ARG (args, EFI_GUID *);
+ if (Protocol == NULL) {
+ break;
+ }
+
+ Interface = VA_ARG (args, VOID *);
+
+ //
+ // Uninstall it
+ //
+ Status = CoreUninstallProtocolInterface (Handle, Protocol, Interface);
+ }
+
+ //
+ // If there was an error, add all the interfaces that were
+ // uninstalled without any errors
+ //
+ if (EFI_ERROR (Status)) {
+ //
+ // Reset the va_arg back to the first argument.
+ //
+ VA_START (args, Handle);
+ for (; Index > 1; Index--) {
+ Protocol = VA_ARG(args, EFI_GUID *);
+ Interface = VA_ARG(args, VOID *);
+ CoreInstallProtocolInterface (&Handle, Protocol, EFI_NATIVE_INTERFACE, Interface);
+ }
+ }
+
+ return Status;
+}
+
+PROTOCOL_INTERFACE *
+CoreGetProtocolInterface (
+ IN EFI_HANDLE UserHandle,
+ IN EFI_GUID *Protocol
+ )
+/*++
+
+Routine Description:
+
+ Locate a certain GUID protocol interface in a Handle's protocols.
+
+Arguments:
+
+ UserHandle - The handle to obtain the protocol interface on
+
+ Protocol - The GUID of the protocol
+
+Returns:
+
+ The requested protocol interface for the handle
+
+--*/
+{
+ EFI_STATUS Status;
+ PROTOCOL_ENTRY *ProtEntry;
+ PROTOCOL_INTERFACE *Prot;
+ IHANDLE *Handle;
+ EFI_LIST_ENTRY *Link;
+
+ Status = CoreValidateHandle (UserHandle);
+ if (EFI_ERROR (Status)) {
+ return NULL;
+ }
+
+ Handle = (IHANDLE *)UserHandle;
+
+ //
+ // Look at each protocol interface for a match
+ //
+ for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {
+ Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);
+ ProtEntry = Prot->Protocol;
+ if (EfiCompareGuid (&ProtEntry->ProtocolID, Protocol)) {
+ return Prot;
+ }
+ }
+ return NULL;
+}
+
+EFI_BOOTSERVICE
+EFI_STATUS
+EFIAPI
+CoreHandleProtocol (
+ IN EFI_HANDLE UserHandle,
+ IN EFI_GUID *Protocol,
+ OUT VOID **Interface
+ )
+/*++
+
+Routine Description:
+
+ Queries a handle to determine if it supports a specified protocol.
+
+Arguments:
+
+ UserHandle - The handle being queried.
+
+ Protocol - The published unique identifier of the protocol.
+
+ Interface - Supplies the address where a pointer to the corresponding Protocol
+ Interface is returned.
+
+Returns:
+
+ The requested protocol interface for the handle
+
+--*/
+{
+ return CoreOpenProtocol (
+ UserHandle,
+ Protocol,
+ Interface,
+ gDxeCoreImageHandle,
+ NULL,
+ EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL
+ );
+}
+
+EFI_BOOTSERVICE11
+EFI_STATUS
+EFIAPI
+CoreOpenProtocol (
+ IN EFI_HANDLE UserHandle,
+ IN EFI_GUID *Protocol,
+ OUT VOID **Interface OPTIONAL,
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINT32 Attributes
+ )
+/*++
+
+Routine Description:
+
+ Locates the installed protocol handler for the handle, and
+ invokes it to obtain the protocol interface. Usage information
+ is registered in the protocol data base.
+
+Arguments:
+
+ UserHandle - The handle to obtain the protocol interface on
+
+ Protocol - The ID of the protocol
+
+ Interface - The location to return the protocol interface
+
+ ImageHandle - The handle of the Image that is opening the protocol interface
+ specified by Protocol and Interface.
+
+ ControllerHandle - The controller handle that is requiring this interface.
+
+ Attributes - The open mode of the protocol interface specified by Handle
+ and Protocol.
+
+Returns:
+
+ EFI_INVALID_PARAMETER - Protocol is NULL.
+
+ EFI_SUCCESS - Get the protocol interface.
+
+--*/
+{
+ EFI_STATUS Status;
+ PROTOCOL_INTERFACE *Prot;
+ EFI_LIST_ENTRY *Link;
+ OPEN_PROTOCOL_DATA *OpenData;
+ BOOLEAN ByDriver;
+ BOOLEAN Exclusive;
+ BOOLEAN Disconnect;
+ BOOLEAN ExactMatch;
+
+ //
+ // Check for invalid Protocol
+ //
+ if (Protocol == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Check for invalid Interface
+ //
+ if (Attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL) {
+ if (Interface == NULL) {
+ return EFI_INVALID_PARAMETER;
+ } else {
+ *Interface = NULL;
+ }
+ }
+
+ //
+ // Check for invalid UserHandle
+ //
+ Status = CoreValidateHandle (UserHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Check for invalid Attributes
+ //
+ switch (Attributes) {
+ case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER :
+ Status = CoreValidateHandle (ImageHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ Status = CoreValidateHandle (ControllerHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ if (UserHandle == ControllerHandle) {
+ return EFI_INVALID_PARAMETER;
+ }
+ break;
+ case EFI_OPEN_PROTOCOL_BY_DRIVER :
+ case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE :
+ Status = CoreValidateHandle (ImageHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ Status = CoreValidateHandle (ControllerHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ break;
+ case EFI_OPEN_PROTOCOL_EXCLUSIVE :
+ Status = CoreValidateHandle (ImageHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ break;
+ case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL :
+ case EFI_OPEN_PROTOCOL_GET_PROTOCOL :
+ case EFI_OPEN_PROTOCOL_TEST_PROTOCOL :
+ break;
+ default:
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Lock the protocol database
+ //
+ CoreAcquireProtocolLock ();
+
+ //
+ // Look at each protocol interface for a match
+ //
+ Prot = CoreGetProtocolInterface (UserHandle, Protocol);
+ if (Prot == NULL) {
+ Status = EFI_UNSUPPORTED;
+ goto Done;
+ }
+
+ //
+ // This is the protocol interface entry for this protocol
+ //
+ if (Attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL) {
+ *Interface = Prot->Interface;
+ }
+ Status = EFI_SUCCESS;
+
+ ByDriver = FALSE;
+ Exclusive = FALSE;
+ for ( Link = Prot->OpenList.ForwardLink; Link != &Prot->OpenList; Link = Link->ForwardLink) {
+ OpenData = CR (Link, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
+ ExactMatch = (BOOLEAN)((OpenData->AgentHandle == ImageHandle) &&
+ (OpenData->Attributes == Attributes) &&
+ (OpenData->ControllerHandle == ControllerHandle));
+ if (OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) {
+ ByDriver = TRUE;
+ if (ExactMatch) {
+ Status = EFI_ALREADY_STARTED;
+ goto Done;
+ }
+ }
+ if (OpenData->Attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) {
+ Exclusive = TRUE;
+ } else if (ExactMatch) {
+ OpenData->OpenCount++;
+ Status = EFI_SUCCESS;
+ goto Done;
+ }
+ }
+
+ //
+ // ByDriver TRUE -> A driver is managing (UserHandle, Protocol)
+ // ByDriver FALSE -> There are no drivers managing (UserHandle, Protocol)
+ // Exclusive TRUE -> Something has exclusive access to (UserHandle, Protocol)
+ // Exclusive FALSE -> Nothing has exclusive access to (UserHandle, Protocol)
+ //
+
+ switch (Attributes) {
+ case EFI_OPEN_PROTOCOL_BY_DRIVER :
+ if (Exclusive || ByDriver) {
+ Status = EFI_ACCESS_DENIED;
+ goto Done;
+ }
+ break;
+ case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE :
+ case EFI_OPEN_PROTOCOL_EXCLUSIVE :
+ if (Exclusive) {
+ Status = EFI_ACCESS_DENIED;
+ goto Done;
+ }
+ if (ByDriver) {
+ do {
+ Disconnect = FALSE;
+ for ( Link = Prot->OpenList.ForwardLink; (Link != &Prot->OpenList) && (!Disconnect); Link = Link->ForwardLink) {
+ OpenData = CR (Link, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
+ if (OpenData->Attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) {
+ Disconnect = TRUE;
+ CoreReleaseProtocolLock ();
+ Status = CoreDisconnectController (UserHandle, OpenData->AgentHandle, NULL);
+ CoreAcquireProtocolLock ();
+ if (EFI_ERROR (Status)) {
+ Status = EFI_ACCESS_DENIED;
+ goto Done;
+ }
+ }
+ }
+ } while (Disconnect);
+ }
+ break;
+ case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER :
+ case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL :
+ case EFI_OPEN_PROTOCOL_GET_PROTOCOL :
+ case EFI_OPEN_PROTOCOL_TEST_PROTOCOL :
+ break;
+ }
+
+ if (ImageHandle == NULL) {
+ Status = EFI_SUCCESS;
+ goto Done;
+ }
+ //
+ // Create new entry
+ //
+ OpenData = CoreAllocateBootServicesPool (sizeof(OPEN_PROTOCOL_DATA));
+ if (OpenData == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ } else {
+ OpenData->Signature = OPEN_PROTOCOL_DATA_SIGNATURE;
+ OpenData->AgentHandle = ImageHandle;
+ OpenData->ControllerHandle = ControllerHandle;
+ OpenData->Attributes = Attributes;
+ OpenData->OpenCount = 1;
+ InsertTailList (&Prot->OpenList, &OpenData->Link);
+ Prot->OpenListCount++;
+ Status = EFI_SUCCESS;
+ }
+
+Done:
+ //
+ // Done. Release the database lock are return
+ //
+ CoreReleaseProtocolLock ();
+ return Status;
+}
+
+EFI_BOOTSERVICE11
+EFI_STATUS
+EFIAPI
+CoreCloseProtocol (
+ IN EFI_HANDLE UserHandle,
+ IN EFI_GUID *Protocol,
+ IN EFI_HANDLE AgentHandle,
+ IN EFI_HANDLE ControllerHandle
+ )
+/*++
+
+Routine Description:
+
+ Closes a protocol on a handle that was opened using OpenProtocol().
+
+Arguments:
+
+ UserHandle - The handle for the protocol interface that was previously opened
+ with OpenProtocol(), and is now being closed.
+ Protocol - The published unique identifier of the protocol. It is the caller¡¯s
+ responsibility to pass in a valid GUID.
+ AgentHandle - The handle of the agent that is closing the protocol interface.
+ ControllerHandle - If the agent that opened a protocol is a driver that follows the
+ EFI Driver Model, then this parameter is the controller handle
+ that required the protocol interface. If the agent does not follow
+ the EFI Driver Model, then this parameter is optional and may be NULL.
+
+Returns:
+
+ EFI_SUCCESS - The protocol instance was closed.
+ EFI_INVALID_PARAMETER - Handle, AgentHandle or ControllerHandle is not a valid EFI_HANDLE.
+ EFI_NOT_FOUND - Can not find the specified protocol or AgentHandle.
+
+--*/
+{
+ EFI_STATUS Status;
+ PROTOCOL_INTERFACE *ProtocolInterface;
+ EFI_LIST_ENTRY *Link;
+ OPEN_PROTOCOL_DATA *OpenData;
+
+ //
+ // Check for invalid parameters
+ //
+ Status = CoreValidateHandle (UserHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ Status = CoreValidateHandle (AgentHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ if (ControllerHandle != NULL_HANDLE) {
+ Status = CoreValidateHandle (ControllerHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ }
+ if (Protocol == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Lock the protocol database
+ //
+ CoreAcquireProtocolLock ();
+
+ //
+ // Look at each protocol interface for a match
+ //
+ Status = EFI_NOT_FOUND;
+ ProtocolInterface = CoreGetProtocolInterface (UserHandle, Protocol);
+ if (ProtocolInterface == NULL) {
+ goto Done;
+ }
+
+ //
+ // Walk the Open data base looking for AgentHandle
+ //
+ Link = ProtocolInterface->OpenList.ForwardLink;
+ while (Link != &ProtocolInterface->OpenList) {
+ OpenData = CR (Link, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
+ Link = Link->ForwardLink;
+ if ((OpenData->AgentHandle == AgentHandle) && (OpenData->ControllerHandle == ControllerHandle)) {
+ RemoveEntryList (&OpenData->Link);
+ ProtocolInterface->OpenListCount--;
+ CoreFreePool (OpenData);
+ Status = EFI_SUCCESS;
+ }
+ }
+
+Done:
+ //
+ // Done. Release the database lock and return.
+ //
+ CoreReleaseProtocolLock ();
+ return Status;
+}
+
+
+EFI_BOOTSERVICE11
+EFI_STATUS
+EFIAPI
+CoreOpenProtocolInformation (
+ IN EFI_HANDLE UserHandle,
+ IN EFI_GUID *Protocol,
+ OUT EFI_OPEN_PROTOCOL_INFORMATION_ENTRY **EntryBuffer,
+ OUT UINTN *EntryCount
+ )
+/*++
+
+Routine Description:
+
+ Return information about Opened protocols in the system
+
+Arguments:
+
+ UserHandle - The handle to close the protocol interface on
+
+ Protocol - The ID of the protocol
+
+ EntryBuffer - A pointer to a buffer of open protocol information in the form of
+ EFI_OPEN_PROTOCOL_INFORMATION_ENTRY structures.
+
+ EntryCount - Number of EntryBuffer entries
+
+Returns:
+
+
+--*/
+{
+ EFI_STATUS Status;
+ PROTOCOL_INTERFACE *ProtocolInterface;
+ EFI_LIST_ENTRY *Link;
+ OPEN_PROTOCOL_DATA *OpenData;
+ EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *Buffer;
+ UINTN Count;
+ UINTN Size;
+
+ *EntryBuffer = NULL;
+ *EntryCount = 0;
+
+ //
+ // Lock the protocol database
+ //
+ CoreAcquireProtocolLock ();
+
+ //
+ // Look at each protocol interface for a match
+ //
+ Status = EFI_NOT_FOUND;
+ ProtocolInterface = CoreGetProtocolInterface (UserHandle, Protocol);
+ if (ProtocolInterface == NULL) {
+ goto Done;
+ }
+
+ //
+ // Count the number of Open Entries
+ //
+ for ( Link = ProtocolInterface->OpenList.ForwardLink, Count = 0;
+ (Link != &ProtocolInterface->OpenList) ;
+ Link = Link->ForwardLink ) {
+ Count++;
+ }
+
+ ASSERT (Count == ProtocolInterface->OpenListCount);
+
+ if (Count == 0) {
+ Size = sizeof(EFI_OPEN_PROTOCOL_INFORMATION_ENTRY);
+ } else {
+ Size = Count * sizeof(EFI_OPEN_PROTOCOL_INFORMATION_ENTRY);
+ }
+
+ Buffer = CoreAllocateBootServicesPool (Size);
+ if (Buffer == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Done;
+ }
+
+ Status = EFI_SUCCESS;
+ for ( Link = ProtocolInterface->OpenList.ForwardLink, Count = 0;
+ (Link != &ProtocolInterface->OpenList);
+ Link = Link->ForwardLink, Count++ ) {
+ OpenData = CR (Link, OPEN_PROTOCOL_DATA, Link, OPEN_PROTOCOL_DATA_SIGNATURE);
+
+ Buffer[Count].AgentHandle = OpenData->AgentHandle;
+ Buffer[Count].ControllerHandle = OpenData->ControllerHandle;
+ Buffer[Count].Attributes = OpenData->Attributes;
+ Buffer[Count].OpenCount = OpenData->OpenCount;
+ }
+
+ *EntryBuffer = Buffer;
+ *EntryCount = Count;
+
+Done:
+ //
+ // Done. Release the database lock are return
+ //
+ CoreReleaseProtocolLock ();
+ return Status;
+}
+
+
+EFI_BOOTSERVICE11
+EFI_STATUS
+EFIAPI
+CoreProtocolsPerHandle (
+ IN EFI_HANDLE UserHandle,
+ OUT EFI_GUID ***ProtocolBuffer,
+ OUT UINTN *ProtocolBufferCount
+ )
+/*++
+
+Routine Description:
+
+ Retrieves the list of protocol interface GUIDs that are installed on a handle in a buffer allocated
+ from pool.
+
+Arguments:
+
+ UserHandle - The handle from which to retrieve the list of protocol interface
+ GUIDs.
+
+ ProtocolBuffer - A pointer to the list of protocol interface GUID pointers that are
+ installed on Handle.
+
+ ProtocolBufferCount - A pointer to the number of GUID pointers present in
+ ProtocolBuffer.
+
+Returns:
+ EFI_SUCCESS - The list of protocol interface GUIDs installed on Handle was returned in
+ ProtocolBuffer. The number of protocol interface GUIDs was
+ returned in ProtocolBufferCount.
+ EFI_INVALID_PARAMETER - Handle is NULL.
+ EFI_INVALID_PARAMETER - Handle is not a valid EFI_HANDLE.
+ EFI_INVALID_PARAMETER - ProtocolBuffer is NULL.
+ EFI_INVALID_PARAMETER - ProtocolBufferCount is NULL.
+ EFI_OUT_OF_RESOURCES - There is not enough pool memory to store the results.
+
+--*/
+{
+ EFI_STATUS Status;
+ IHANDLE *Handle;
+ PROTOCOL_INTERFACE *Prot;
+ EFI_LIST_ENTRY *Link;
+ UINTN ProtocolCount;
+ EFI_GUID **Buffer;
+
+ Status = CoreValidateHandle (UserHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Handle = (IHANDLE *)UserHandle;
+
+ if (ProtocolBuffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (ProtocolBufferCount == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ *ProtocolBufferCount = 0;
+
+ ProtocolCount = 0;
+
+ CoreAcquireProtocolLock ();
+
+ for (Link = Handle->Protocols.ForwardLink; Link != &Handle->Protocols; Link = Link->ForwardLink) {
+ ProtocolCount++;
+ }
+
+ //
+ // If there are no protocol interfaces installed on Handle, then Handle is not a valid EFI_HANDLE
+ //
+ if (ProtocolCount == 0) {
+ Status = EFI_INVALID_PARAMETER;
+ goto Done;
+ }
+
+ Buffer = CoreAllocateBootServicesPool (sizeof (EFI_GUID *) * ProtocolCount);
+ if (Buffer == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Done;
+ }
+
+ *ProtocolBuffer = Buffer;
+ *ProtocolBufferCount = ProtocolCount;
+
+ for ( Link = Handle->Protocols.ForwardLink, ProtocolCount = 0;
+ Link != &Handle->Protocols;
+ Link = Link->ForwardLink, ProtocolCount++) {
+ Prot = CR(Link, PROTOCOL_INTERFACE, Link, PROTOCOL_INTERFACE_SIGNATURE);
+ Buffer[ProtocolCount] = &(Prot->Protocol->ProtocolID);
+ }
+ Status = EFI_SUCCESS;
+
+Done:
+ CoreReleaseProtocolLock ();
+ return Status;
+}
+
+
+UINT64
+CoreGetHandleDatabaseKey (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ return handle database key.
+
+Arguments:
+
+ None
+
+Returns:
+
+ Handle database key.
+
+--*/
+{
+ return gHandleDatabaseKey;
+}
+
+
+VOID
+CoreConnectHandlesByKey (
+ UINT64 Key
+ )
+/*++
+
+Routine Description:
+
+ Go connect any handles that were created or modified while a image executed.
+
+Arguments:
+
+ Key - The Key to show that the handle has been created/modified
+
+Returns:
+
+ None
+--*/
+{
+ UINTN Count;
+ EFI_LIST_ENTRY *Link;
+ EFI_HANDLE *HandleBuffer;
+ IHANDLE *Handle;
+ UINTN Index;
+
+ //
+ // Lock the protocol database
+ //
+ CoreAcquireProtocolLock ();
+
+ for (Link = gHandleList.ForwardLink, Count = 0; Link != &gHandleList; Link = Link->ForwardLink) {
+ Handle = CR (Link, IHANDLE, AllHandles, EFI_HANDLE_SIGNATURE);
+ if (Handle->Key > Key) {
+ Count++;
+ }
+ }
+
+ HandleBuffer = CoreAllocateBootServicesPool (Count * sizeof (EFI_HANDLE));
+ if (HandleBuffer == NULL) {
+ CoreReleaseProtocolLock ();
+ return;
+ }
+
+ for (Link = gHandleList.ForwardLink, Count = 0; Link != &gHandleList; Link = Link->ForwardLink) {
+ Handle = CR (Link, IHANDLE, AllHandles, EFI_HANDLE_SIGNATURE);
+ if (Handle->Key > Key) {
+ HandleBuffer[Count++] = Handle;
+ }
+ }
+
+ //
+ // Unlock the protocol database
+ //
+ CoreReleaseProtocolLock ();
+
+ //
+ // Connect all handles whose Key value is greater than Key
+ //
+ for (Index = 0; Index < Count; Index++) {
+ CoreConnectController (HandleBuffer[Index], NULL, NULL, TRUE);
+ }
+
+ CoreFreePool(HandleBuffer);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 04:34:24 +0000