StandaloneMmPkg/HobLib: Add HOB Library for management mode.

The Standalone MM environment is initialized during the SEC phase on ARM Standard Platforms. The MM Core driver implements an entry point module which is architecture specific and runs prior to the generic core driver code. The former creates a Hob list that the latter consumes. This happens in the same phase. This patch implements a Hob library that can be used by the entry point module to produce a Hob list and by the core driver code to consume it. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Achin Gupta <[email protected]> Signed-off-by: Supreeth Venkatesh <[email protected]> Reviewed-by: Jiewen Yao <[email protected]> Signed-off-by: Sughosh Ganu <[email protected]>
WalonLi · Jul 20, 2018 · 70a51d7 · 70a51d7
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diff --git a/StandaloneMmPkg/Library/StandaloneMmCoreHobLib/AArch64/StandaloneMmCoreHobLibInternal.c b/StandaloneMmPkg/Library/StandaloneMmCoreHobLib/AArch64/StandaloneMmCoreHobLibInternal.c
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+/** @file
+  HOB Library implementation for Standalone MM Core.
+
+Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017 - 2018, ARM Limited. All rights reserved.<BR>
+
+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 <PiMm.h>
+
+#include <Library/HobLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+
+#include <Guid/MemoryAllocationHob.h>
+
+//
+// Cache copy of HobList pointer.
+//
+extern VOID *gHobList;
+
+EFI_HOB_HANDOFF_INFO_TABLE*
+HobConstructor (
+  IN VOID   *EfiMemoryBegin,
+  IN UINTN  EfiMemoryLength,
+  IN VOID   *EfiFreeMemoryBottom,
+  IN VOID   *EfiFreeMemoryTop
+  )
+{
+  EFI_HOB_HANDOFF_INFO_TABLE  *Hob;
+  EFI_HOB_GENERIC_HEADER      *HobEnd;
+
+  Hob    = EfiFreeMemoryBottom;
+  HobEnd = (EFI_HOB_GENERIC_HEADER *)(Hob+1);
+
+  Hob->Header.HobType     = EFI_HOB_TYPE_HANDOFF;
+  Hob->Header.HobLength   = sizeof (EFI_HOB_HANDOFF_INFO_TABLE);
+  Hob->Header.Reserved    = 0;
+
+  HobEnd->HobType     = EFI_HOB_TYPE_END_OF_HOB_LIST;
+  HobEnd->HobLength   = sizeof (EFI_HOB_GENERIC_HEADER);
+  HobEnd->Reserved    = 0;
+
+  Hob->Version             = EFI_HOB_HANDOFF_TABLE_VERSION;
+  Hob->BootMode            = BOOT_WITH_FULL_CONFIGURATION;
+
+  Hob->EfiMemoryTop        = (UINTN)EfiMemoryBegin + EfiMemoryLength;
+  Hob->EfiMemoryBottom     = (UINTN)EfiMemoryBegin;
+  Hob->EfiFreeMemoryTop    = (UINTN)EfiFreeMemoryTop;
+  Hob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS)(UINTN)(HobEnd+1);
+  Hob->EfiEndOfHobList     = (EFI_PHYSICAL_ADDRESS)(UINTN)HobEnd;
+
+  gHobList = Hob;
+
+  return Hob;
+}