diff options
| author | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-07-01 10:59:06 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-07-01 10:59:06 +0000 |
| commit | 32f718cf06733443157b5aea509c508e2eba1529 (patch) | |
| tree | ce2c0af5fbeeaf66a9d0efd69713214ee1581526 /EmbeddedPkg | |
| parent | 6da6db17a48485e947d8e4e4c1688b29c23fc3d2 (diff) | |
EmbeddedPkg/PrePiHobListPointerLib: New interface to abstract the HobListPointer storage
This interface allows to use different mechanism to store the HobList Pointer.
EmbeddedPkg/PrePiHobListPointerLib: Implementation of PrePiHobListPointerLib using PCD
This library uses a PCD to store the location of the HobList Pointer.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11947 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'EmbeddedPkg')
3 files changed, 152 insertions, 0 deletions
diff --git a/EmbeddedPkg/Include/Library/PrePiHobListPointerLib.h b/EmbeddedPkg/Include/Library/PrePiHobListPointerLib.h new file mode 100644 index 0000000000..7a666df25d --- /dev/null +++ b/EmbeddedPkg/Include/Library/PrePiHobListPointerLib.h @@ -0,0 +1,44 @@ +/** @file
+*
+* Copyright (c) 2011, ARM Limited. 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.
+*
+**/
+
+#ifndef __PREPI_HOBLIST_POINTER_LIB_H__
+#define __PREPI_HOBLIST_POINTER_LIB_H__
+
+/**
+ Returns the pointer to the HOB list.
+
+ This function returns the pointer to first HOB in the list.
+
+ @return The pointer to the HOB list.
+
+**/
+VOID *
+EFIAPI
+PrePeiGetHobList (
+ VOID
+ );
+
+/**
+ Updates the pointer to the HOB list.
+
+ @param HobList Hob list pointer to store
+
+**/
+EFI_STATUS
+EFIAPI
+PrePeiSetHobList (
+ IN VOID *HobList
+ );
+
+#endif
diff --git a/EmbeddedPkg/Library/PrePiHobListPointerLib/PrePiHobListPointer.c b/EmbeddedPkg/Library/PrePiHobListPointerLib/PrePiHobListPointer.c new file mode 100644 index 0000000000..9f9e9c7d44 --- /dev/null +++ b/EmbeddedPkg/Library/PrePiHobListPointerLib/PrePiHobListPointer.c @@ -0,0 +1,69 @@ +/** @file
+*
+* Copyright (c) 2011, ARM Limited. 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.
+*
+**/
+
+#include <PiPei.h>
+#include <Library/PrePiHobListPointerLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+
+// +// Have to use build system to set the original value in case we are running +// from FLASH and globals don't work. So if you do a GetHobList() and gHobList +// and gHobList is NULL the PCD default values are used. +// +VOID *gHobList = NULL;
+
+
+/**
+ Returns the pointer to the HOB list.
+
+ This function returns the pointer to first HOB in the list.
+
+ @return The pointer to the HOB list.
+
+**/
+VOID *
+EFIAPI
+PrePeiGetHobList (
+ VOID
+ )
+{
+ if (gHobList == NULL) {
+ return (VOID *)*(UINTN*)PcdGet32 (PcdPrePiHobBase);
+ } else {
+ return gHobList;
+ }
+}
+
+
+
+/**
+ Updates the pointer to the HOB list.
+
+ @param HobList Hob list pointer to store
+
+**/
+EFI_STATUS
+EFIAPI
+PrePeiSetHobList (
+ IN VOID *HobList
+ )
+{
+ gHobList = HobList;
+
+ //
+ // If this code is running from ROM this could fail
+ //
+ return (gHobList == HobList) ? EFI_SUCCESS: EFI_UNSUPPORTED;
+}
diff --git a/EmbeddedPkg/Library/PrePiHobListPointerLib/PrePiHobListPointerLib.inf b/EmbeddedPkg/Library/PrePiHobListPointerLib/PrePiHobListPointerLib.inf new file mode 100644 index 0000000000..1ba976780b --- /dev/null +++ b/EmbeddedPkg/Library/PrePiHobListPointerLib/PrePiHobListPointerLib.inf @@ -0,0 +1,39 @@ +#/** @file
+#
+# Copyright (c) 2011, ARM Limited. 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.
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = PrePiHobListPointerLib
+ FILE_GUID = 7a6a7fc0-5ee0-11e0-b47f-0002a5d5c51b
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = PrePiHobListPointerLib
+
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC (EBC is for build only)
+#
+
+[Sources]
+ PrePiHobListPointer.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+
+[LibraryClasses]
+ #DebugLib
+
+[FixedPcd.common]
+ gEmbeddedTokenSpaceGuid.PcdPrePiHobBase
+
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