diff options
Diffstat (limited to 'MdeModulePkg/Universal/PlatformDriverOverride/PlatformDriOverrideDxe/PlatformDriOverride.c')
| -rw-r--r-- | MdeModulePkg/Universal/PlatformDriverOverride/PlatformDriOverrideDxe/PlatformDriOverride.c | 187 |
1 files changed, 101 insertions, 86 deletions
diff --git a/MdeModulePkg/Universal/PlatformDriverOverride/PlatformDriOverrideDxe/PlatformDriOverride.c b/MdeModulePkg/Universal/PlatformDriverOverride/PlatformDriOverrideDxe/PlatformDriOverride.c index fd3aee9..aef0f03 100644 --- a/MdeModulePkg/Universal/PlatformDriverOverride/PlatformDriOverrideDxe/PlatformDriOverride.c +++ b/MdeModulePkg/Universal/PlatformDriverOverride/PlatformDriOverrideDxe/PlatformDriOverride.c @@ -1,6 +1,6 @@ /** @file
-Copyright (c) 2007, Intel Corporation
+Copyright (c) 2007 - 2008, 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
@@ -9,52 +9,20 @@ 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:
-
- PlatformDriOverride.c
-
-Abstract:
-
-
**/
+#include <Uefi.h>
-#include "PlatformDriOverride.h"
-
-EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL gPlatformDriverOverride = {
- GetDriver,
- GetDriverPath,
- DriverLoaded
-};
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/PlatDriOverLib.h>
+#include <Protocol/PlatformDriverOverride.h>
LIST_ENTRY mMappingDataBase = INITIALIZE_LIST_HEAD_VARIABLE (mMappingDataBase);
BOOLEAN mEnvironmentVariableRead = FALSE;
-EFI_HANDLE mCallerImageHandle;
-
-/**
- Platform Driver Override driver entry point, install the Platform Driver Override Protocol
-
- @param ImageHandle ImageHandle of the loaded driver.
- @param SystemTable Pointer to the EFI System Table.
-
- @retval EFI_SUCCESS The DXE Driver, DXE Runtime Driver, DXE SMM Driver,
- or UEFI Driver exited normally.
- @retval EFI_INCOMPATIBLE_VERSION _gUefiDriverRevision is greater than SystemTable->Hdr.Revision.
- @retval Other Return value from ProcessModuleEntryPointList().
-**/
-EFI_STATUS
-EFIAPI
-PlatformDriverOverrideEntry (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-{
- mEnvironmentVariableRead = FALSE;
- mCallerImageHandle = ImageHandle;
- InitializeListHead (&mMappingDataBase);
- return InstallPlatformDriverOverrideProtocol (&gPlatformDriverOverride);
-}
-
+EFI_HANDLE mCallerImageHandle = NULL;
/**
Retrieves the image handle of the platform override driver for a controller in the system.
@@ -82,12 +50,13 @@ PlatformDriverOverrideEntry ( EFI_STATUS
EFIAPI
GetDriver (
- IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL * This,
+ IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
- IN OUT EFI_HANDLE * DriverImageHandle
+ IN OUT EFI_HANDLE *DriverImageHandle
)
{
EFI_STATUS Status;
+
//
// Check that ControllerHandle is a valid handle
//
@@ -105,59 +74,46 @@ GetDriver ( mEnvironmentVariableRead = TRUE;
Status = InitOverridesMapping (&mMappingDataBase);
- if (Status == EFI_NOT_FOUND) {
- InitializeListHead (&mMappingDataBase);
- return EFI_NOT_FOUND;
- } else if (Status == EFI_VOLUME_CORRUPTED){
- DEBUG ((DEBUG_ERROR, "Platform Driver Override Variable is corrupt\n"));
- //
- // The environment variable(s) that contain the override mappings from Controller Device Path to
- // a set of Driver Device Paths is corrupted, platform code can use LibDeleteOverridesVariables to
- // delete all orverride variables as a policy. Here can be IBV/OEM customized.
- //
-
- //LibDeleteOverridesVariables();
- InitializeListHead (&mMappingDataBase);
- return EFI_NOT_FOUND;
- } else if (EFI_ERROR (Status)){
+ if (EFI_ERROR (Status)){
+ DEBUG ((DEBUG_ERROR, "The status to Get Platform Driver Override Variable is %r\n", Status));
InitializeListHead (&mMappingDataBase);
return EFI_NOT_FOUND;
}
}
+
//
- // if the environment variable does not exist or the variable appears to be corrupt, just return not found
+ // if the environment variable does not exist, just return not found
//
if (IsListEmpty (&mMappingDataBase)) {
return EFI_NOT_FOUND;
}
return GetDriverFromMapping (
- This,
ControllerHandle,
DriverImageHandle,
&mMappingDataBase,
mCallerImageHandle
);
-
}
-
/**
- For the use of the ControllerHandle parameter in the GetDriverPath()
- But this API is very difficult to use, so not support.
-
- @param This A pointer to the
- EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL instance.
- @param ControllerHandle The device handle of the controller to check if a
- driver override exists.
- @param DriverImagePath The device path for this Image.
+ Retrieves the device path of the platform override driver for a controller in the system.
+ This driver doesn't support this API.
+
+ @param This A pointer to the EFI_PLATFORM_DRIVER_OVERRIDE_
+ PROTOCOL instance.
+ @param ControllerHandle The device handle of the controller to check if a driver override
+ exists.
+ @param DriverImageHandle On input, a pointer to the previous driver image handle returned
+ by GetDriverPath(). On output, a pointer to the next driver
+ device path.
@retval EFI_UNSUPPORTED
**/
EFI_STATUS
EFIAPI
GetDriverPath (
- IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL * This,
+ IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN OUT EFI_DEVICE_PATH_PROTOCOL **DriverImagePath
)
@@ -167,30 +123,89 @@ GetDriverPath ( /**
- For the use of the ControllerHandle parameter in the DriverLoaded()
- But this API is very difficult to use, so not support.
-
- @param This A pointer to the
- EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL instance.
- @param ControllerHandle The device handle of the controller to check if a
- driver override exists.
- @param DriverImagePath The device path for this Image.
- @param DriverImageHandle On input, a pointer to the previous driver image
- handle returned by GetDriver(). On output, a
- pointer to the next driver image handle. Passing
- in a NULL, will return the first driver image
- handle for ControllerHandle.
+ Used to associate a driver image handle with a device path that was returned on a prior call to the
+ GetDriverPath() service. This driver image handle will then be available through the
+ GetDriver() service. This driver doesn't support this API.
+
+ @param This A pointer to the EFI_PLATFORM_DRIVER_OVERRIDE_
+ PROTOCOL instance.
+ @param ControllerHandle The device handle of the controller.
+ @param DriverImagePath A pointer to the driver device path that was returned in a prior
+ call to GetDriverPath().
+ @param DriverImageHandle The driver image handle that was returned by LoadImage()
+ when the driver specified by DriverImagePath was loaded
+ into memory.
@retval EFI_UNSUPPORTED
**/
EFI_STATUS
EFIAPI
DriverLoaded (
- IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL * This,
+ IN EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
- IN EFI_DEVICE_PATH_PROTOCOL * DriverImagePath,
+ IN EFI_DEVICE_PATH_PROTOCOL *DriverImagePath,
IN EFI_HANDLE DriverImageHandle
)
{
return EFI_UNSUPPORTED;
}
+
+EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL mPlatformDriverOverride = {
+ GetDriver,
+ GetDriverPath,
+ DriverLoaded
+};
+
+/**
+ Platform Driver Override driver entry point, install the Platform Driver Override Protocol
+
+ @param ImageHandle ImageHandle of the loaded driver.
+ @param SystemTable Pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The DXE Driver, DXE Runtime Driver, DXE SMM Driver,
+ or UEFI Driver exited normally.
+ @retval EFI_ALREADY_STARTED A protocol instance has been installed. Not need install again.
+**/
+EFI_STATUS
+EFIAPI
+PlatformDriverOverrideEntry (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_HANDLE Handle;
+ EFI_STATUS Status;
+ VOID *Instance;
+
+ mCallerImageHandle = ImageHandle;
+
+ //
+ // According to UEFI spec, there can be at most a single instance
+ // in the system of the EFI_PLATFORM_DRIVER_OVERRIDE_PROTOCOL.
+ // So here we check the existence.
+ //
+ Status = gBS->LocateProtocol (
+ &gEfiPlatformDriverOverrideProtocolGuid,
+ NULL,
+ &Instance
+ );
+ //
+ // If there was no error, assume there is an installation and return error
+ //
+ if (!EFI_ERROR (Status)) {
+ return EFI_ALREADY_STARTED;
+ }
+
+ //
+ // Install platform driver override protocol
+ //
+ Handle = NULL;
+ Status = gBS->InstallProtocolInterface (
+ &Handle,
+ &gEfiPlatformDriverOverrideProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &mPlatformDriverOverride
+ );
+ ASSERT_EFI_ERROR (Status);
+ return EFI_SUCCESS;
+}
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