[PATCH 6/8] AlderlakeSiliconPkg/SystemAgent: Add NVS support

["Saloni Kasbekar" <saloni.kasbekar@intel.com>]

Adds the System Agent NVS ACPI table and structures

Cc: Sai Chaganty <rangasai.v.chaganty@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Isaac Oram <isaac.w.oram@intel.com>
Cc: Rosen Chuang <rosen.chuang@intel.com>
Signed-off-by: Saloni Kasbekar <saloni.kasbekar@intel.com>
---
 .../SystemAgent/AcpiTables/SaSsdt/SaNvs.asl   | 18 +++++++++++
 .../IncludePrivate/Protocol/SaNvsArea.h       | 30 +++++++++++++++++++
 .../SystemAgent/IncludePrivate/SaNvsAreaDef.h | 22 ++++++++++++++
 3 files changed, 70 insertions(+)
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/AcpiTables/SaSsdt/SaNvs.asl
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/IncludePrivate/Protocol/SaNvsArea.h
 create mode 100644 Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/IncludePrivate/SaNvsAreaDef.h

diff --git a/Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/AcpiTables/SaSsdt/SaNvs.asl b/Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/AcpiTables/SaSsdt/SaNvs.asl
new file mode 100644
index 0000000000..e9785873d2
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/AcpiTables/SaSsdt/SaNvs.asl
@@ -0,0 +1,18 @@
+/**@file
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+  //
+  // Define SA NVS Area operation region.
+  //
+
+
+  OperationRegion(SANV,SystemMemory,SANB,SANL)
+  Field(SANV,AnyAcc,Lock,Preserve)
+  {  Offset(0),      M64B, 64, // Offset(0),   Base of above 4GB MMIO resource
+  Offset(8),    M64L, 64, // Offset(8),   Length of above 4GB MMIO resource
+  Offset(16),    M32B, 32, // Offset(16),   Base of below 4GB MMIO resource
+  Offset(20),    M32L, 32, // Offset(20),   Length of below 4GB MMIO resource
+  }
\ No newline at end of file
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/IncludePrivate/Protocol/SaNvsArea.h b/Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/IncludePrivate/Protocol/SaNvsArea.h
new file mode 100644
index 0000000000..3a75465843
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/IncludePrivate/Protocol/SaNvsArea.h
@@ -0,0 +1,30 @@
+/** @file
+  Definition of the System Agent global NVS area protocol.
+  This protocol publishes the address and format of a global ACPI NVS buffer
+  used as a communications buffer between SMM/DXE/PEI code and ASL code.
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef _SYSTEM_AGENT_NVS_AREA_H_
+#define _SYSTEM_AGENT_NVS_AREA_H_
+
+//
+// SA NVS Area definition
+//
+#include <SaNvsAreaDef.h>
+
+//
+// Extern the GUID for protocol users.
+//
+extern EFI_GUID gSaNvsAreaProtocolGuid;
+
+///
+/// System Agent Global NVS Area Protocol
+///
+typedef struct {
+  SYSTEM_AGENT_NVS_AREA *Area;        ///< System Agent Global NVS Area Structure
+} SYSTEM_AGENT_NVS_AREA_PROTOCOL;
+
+#endif // _SYSTEM_AGENT_NVS_AREA_H_
diff --git a/Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/IncludePrivate/SaNvsAreaDef.h b/Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/IncludePrivate/SaNvsAreaDef.h
new file mode 100644
index 0000000000..5b8136866a
--- /dev/null
+++ b/Silicon/Intel/AlderlakeSiliconPkg/SystemAgent/IncludePrivate/SaNvsAreaDef.h
@@ -0,0 +1,22 @@
+/**@file
+
+   Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+   SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+  //
+  // Define SA NVS Area operation region.
+  //
+#ifndef _SA_NVS_AREA_DEF_H_
+#define _SA_NVS_AREA_DEF_H_
+
+#pragma pack (push,1)
+typedef struct {
+  UINT64   Mmio64Base;                              ///< Offset 0     Base of above 4GB MMIO resource
+  UINT64   Mmio64Length;                            ///< Offset 8     Length of above 4GB MMIO resource
+  UINT32   Mmio32Base;                              ///< Offset 16     Base of below 4GB MMIO resource
+  UINT32   Mmio32Length;                            ///< Offset 20     Length of below 4GB MMIO resource
+} SYSTEM_AGENT_NVS_AREA;
+
+#pragma pack(pop)
+#endif
-- 
2.36.1.windows.1