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
--- /dev/null
+/** @file\r
+*\r
+* Copyright (c) 2011, ARM Limited. All rights reserved.\r
+* \r
+* This program and the accompanying materials \r
+* are licensed and made available under the terms and conditions of the BSD License \r
+* which accompanies this distribution. The full text of the license may be found at \r
+* http://opensource.org/licenses/bsd-license.php \r
+*\r
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
+*\r
+**/\r
+\r
+#ifndef __PREPI_HOBLIST_POINTER_LIB_H__\r
+#define __PREPI_HOBLIST_POINTER_LIB_H__\r
+\r
+/**\r
+ Returns the pointer to the HOB list.\r
+\r
+ This function returns the pointer to first HOB in the list.\r
+\r
+ @return The pointer to the HOB list.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+PrePeiGetHobList (\r
+ VOID\r
+ );\r
+\r
+/**\r
+ Updates the pointer to the HOB list.\r
+\r
+ @param HobList Hob list pointer to store\r
+ \r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+PrePeiSetHobList (\r
+ IN VOID *HobList\r
+ );\r
+\r
+#endif\r
--- /dev/null
+/** @file\r
+*\r
+* Copyright (c) 2011, ARM Limited. All rights reserved.\r
+* \r
+* This program and the accompanying materials \r
+* are licensed and made available under the terms and conditions of the BSD License \r
+* which accompanies this distribution. The full text of the license may be found at \r
+* http://opensource.org/licenses/bsd-license.php \r
+*\r
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
+*\r
+**/\r
+\r
+#include <PiPei.h>\r
+#include <Library/PrePiHobListPointerLib.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/PcdLib.h>\r
+\r
+//
+// 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;\r
+\r
+\r
+/**\r
+ Returns the pointer to the HOB list.\r
+\r
+ This function returns the pointer to first HOB in the list.\r
+\r
+ @return The pointer to the HOB list.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+PrePeiGetHobList (\r
+ VOID\r
+ )\r
+{\r
+ if (gHobList == NULL) {\r
+ return (VOID *)*(UINTN*)PcdGet32 (PcdPrePiHobBase);\r
+ } else {\r
+ return gHobList;\r
+ }\r
+}\r
+\r
+\r
+\r
+/**\r
+ Updates the pointer to the HOB list.\r
+\r
+ @param HobList Hob list pointer to store\r
+ \r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+PrePeiSetHobList (\r
+ IN VOID *HobList\r
+ )\r
+{\r
+ gHobList = HobList;\r
+ \r
+ //\r
+ // If this code is running from ROM this could fail\r
+ //\r
+ return (gHobList == HobList) ? EFI_SUCCESS: EFI_UNSUPPORTED;\r
+}\r
--- /dev/null
+#/** @file\r
+#\r
+# Copyright (c) 2011, ARM Limited. All rights reserved.\r
+# \r
+# This program and the accompanying materials \r
+# are licensed and made available under the terms and conditions of the BSD License \r
+# which accompanies this distribution. The full text of the license may be found at \r
+# http://opensource.org/licenses/bsd-license.php \r
+#\r
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
+#\r
+#**/\r
+\r
+[Defines]\r
+ INF_VERSION = 0x00010005\r
+ BASE_NAME = PrePiHobListPointerLib\r
+ FILE_GUID = 7a6a7fc0-5ee0-11e0-b47f-0002a5d5c51b\r
+ MODULE_TYPE = BASE\r
+ VERSION_STRING = 1.0\r
+ LIBRARY_CLASS = PrePiHobListPointerLib\r
+\r
+#\r
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC (EBC is for build only)\r
+#\r
+\r
+[Sources]\r
+ PrePiHobListPointer.c\r
+\r
+[Packages]\r
+ MdePkg/MdePkg.dec\r
+ EmbeddedPkg/EmbeddedPkg.dec\r
+\r
+[LibraryClasses]\r
+ #DebugLib\r
+ \r
+[FixedPcd.common]\r
+ gEmbeddedTokenSpaceGuid.PcdPrePiHobBase\r
+
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