mirror of https://github.com/acidanthera/audk.git
Add Null implementation of the Legacy Region Protocol
This module may be used on platforms that do not have the ability to manage the legacy regions or as a template module for implementing support for legacy regions git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8695 6f19259b-4bc3-4df7-8a09-765794883524
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mdkinney
parent
c2c1e4504b
commit
78d6366d68
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@ -215,7 +215,7 @@
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IntelFrameworkModulePkg/Universal/StatusCode/Pei/StatusCodePei.inf
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IntelFrameworkModulePkg/Universal/Console/VgaClassDxe/VgaClassDxe.inf
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IntelFrameworkModulePkg/Universal/BdsDxe/BdsDxe.inf
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IntelFrameworkModulePkg/Universal/LegacyRegionDxe/LegacyRegionDxe.inf
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[Components.IA32]
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IntelFrameworkModulePkg/Universal/StatusCode/RuntimeDxe/StatusCodeRuntimeDxe.inf
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/**
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Produces the Legacy Region Protocol.
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This generic implementation of the Legacy Region Protocol does not actually
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perform any lock/unlock operations. This module may be used on platforms
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that do not provide HW locking of the legacy memory regions. It can also
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be used as a template driver for implementing the Legacy Region Protocol on
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a platform that does support HW locking of the legacy memory regions.
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Copyright (c) 2009, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <PiDxe.h>
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#include <Protocol/LegacyRegion.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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//
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// Function prototypes of the Legacy Region Protocol services this module produces
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//
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EFI_STATUS
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EFIAPI
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LegacyRegionDecode (
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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IN BOOLEAN *On
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);
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EFI_STATUS
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EFIAPI
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LegacyRegionLock (
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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OUT UINT32 *Granularity OPTIONAL
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);
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EFI_STATUS
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EFIAPI
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LegacyRegionBootLock (
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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OUT UINT32 *Granularity OPTIONAL
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);
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EFI_STATUS
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EFIAPI
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LegacyRegionUnlock (
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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OUT UINT32 *Granularity OPTIONAL
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);
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//
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// Module global for the handle the Legacy Region Protocol is installed
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//
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EFI_HANDLE mLegacyRegionHandle = NULL;
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//
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// Module global for the Legacy Region Protocol instance that is installed onto
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// mLegacyRegionHandle
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//
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EFI_LEGACY_REGION_PROTOCOL mLegacyRegion = {
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LegacyRegionDecode,
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LegacyRegionLock,
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LegacyRegionBootLock,
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LegacyRegionUnlock
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};
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/**
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Sets hardware to decode or not decode a region.
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@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
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@param Start Start of region to decode.
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@param Length Size in bytes of the region.
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@param On Decode/nondecode flag.
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@retval EFI_SUCCESS Decode range successfully changed.
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**/
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EFI_STATUS
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EFIAPI
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LegacyRegionDecode (
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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IN BOOLEAN *On
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)
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{
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return EFI_SUCCESS;
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}
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/**
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Sets a region to read only.
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@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
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@param Start Start of region to lock.
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@param Length Size in bytes of the region.
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@param Granularity Lock attribute affects this granularity in bytes.
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@retval EFI_SUCCESS The region was made read only.
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**/
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EFI_STATUS
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EFIAPI
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LegacyRegionLock (
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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OUT UINT32 *Granularity OPTIONAL
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)
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{
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return EFI_SUCCESS;
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}
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/**
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Sets a region to read only and ensures that flash is locked from being
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inadvertently modified.
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@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
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@param Start Start of region to lock.
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@param Length Size in bytes of the region.
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@param Granularity Lock attribute affects this granularity in bytes.
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@retval EFI_SUCCESS The region was made read only and flash is locked.
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**/
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EFI_STATUS
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EFIAPI
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LegacyRegionBootLock (
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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OUT UINT32 *Granularity OPTIONAL
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)
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{
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return EFI_SUCCESS;
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}
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/**
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Sets a region to read-write.
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@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
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@param Start Start of region to lock.
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@param Length Size in bytes of the region.
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@param Granularity Lock attribute affects this granularity in bytes.
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@retval EFI_SUCCESS The region was successfully made read-write.
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**/
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EFI_STATUS
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EFIAPI
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LegacyRegionUnlock (
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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OUT UINT32 *Granularity OPTIONAL
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)
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{
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return EFI_SUCCESS;
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}
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/**
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The user Entry Point for module LegacyRegionDxe. The user code starts with this function.
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@param[in] ImageHandle The firmware allocated handle for the EFI image.
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@param[in] SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval other Some error occurs when executing this entry point.
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**/
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EFI_STATUS
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EFIAPI
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LegacyRegionInstall (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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//
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// Make sure the Legacy Region Protocol is not already installed in the system
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//
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ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiLegacyRegionProtocolGuid);
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//
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// Install the protocol on a new handle.
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//
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Status = gBS->InstallMultipleProtocolInterfaces (
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&mLegacyRegionHandle,
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&gEfiLegacyRegionProtocolGuid, &mLegacyRegion,
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NULL
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);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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@ -0,0 +1,51 @@
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#/** @file
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# Produces the Legacy Region Protocol.
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#
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# This generic implementation of the Legacy Region Protocol does not actually
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# perform any lock/unlock operations. This module may be used on platforms
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# that do not provide HW locking of the legacy memory regions. It can also
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# be used as a template driver for implementing the Legacy Region Protocol on
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# a platform that does support HW locking of the legacy memory regions.
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#
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# Copyright (c) 2009, Intel Corporation
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# All rights reserved. This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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#**/
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = LegacyRegionDxe
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FILE_GUID = 8C439043-85CA-467a-96F1-CB14F4D0DCDA
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MODULE_TYPE = DXE_DRIVER
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VERSION_STRING = 1.0
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ENTRY_POINT = LegacyRegionInstall
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#
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# The following information is for reference only and not required by the build tools.
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#
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# VALID_ARCHITECTURES = IA32 X64 IPF EBC
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#
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[Sources]
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LegacyRegion.c
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[Packages]
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MdePkg/MdePkg.dec
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IntelFrameworkPkg/IntelFrameworkPkg.dec
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[LibraryClasses]
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UefiDriverEntryPoint
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DebugLib
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UefiBootServicesTableLib
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[Protocols]
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gEfiLegacyRegionProtocolGuid ## PRODUCES
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[Depex]
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TRUE
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