From 32f718cf06733443157b5aea509c508e2eba1529 Mon Sep 17 00:00:00 2001 From: oliviermartin Date: Fri, 1 Jul 2011 10:59:06 +0000 Subject: [PATCH] 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 --- .../Include/Library/PrePiHobListPointerLib.h | 44 ++++++++++++ .../PrePiHobListPointer.c | 69 +++++++++++++++++++ .../PrePiHobListPointerLib.inf | 39 +++++++++++ 3 files changed, 152 insertions(+) create mode 100644 EmbeddedPkg/Include/Library/PrePiHobListPointerLib.h create mode 100644 EmbeddedPkg/Library/PrePiHobListPointerLib/PrePiHobListPointer.c create mode 100644 EmbeddedPkg/Library/PrePiHobListPointerLib/PrePiHobListPointerLib.inf 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 +#include +#include +#include + +// +// 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 + \ No newline at end of file -- 2.39.2