OvmfPkg: define EFI_XEN_OVMF_INFO

EFI_XEN_OVMF_INFO is defined to accept configurations from hvmloader. It
must match the definition on Xen side.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14942 6f19259b-4bc3-4df7-8a09-765794883524

OvmfPkg/PlatformPei/Xen.h

@@ -0,0 +1,45 @@
+/** @file
+  Ovmf info structure passed by Xen
+
+Copyright (c) 2013, Citrix Systems UK Ltd.<BR>
+
+This program and the accompanying materials are licensed and made available under
+the terms and conditions of the BSD License that 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 __XEN_H__
+#define __XEN_H__
+
+#include <PiPei.h>
+
+// Physical address of OVMF info
+#define OVMF_INFO_PHYSICAL_ADDRESS 0x00001000
+
+// This structure must match the definition on Xen side
+#pragma pack(1)
+typedef struct {
+  CHAR8 Signature[14]; // XenHVMOVMF\0
+  UINT8 Length;        // Length of this structure
+  UINT8 Checksum;      // Set such that the sum over bytes 0..length == 0
+  //
+  // Physical address of an array of TablesCount elements.
+  //
+  // Each element contains the physical address of a BIOS table.
+  //
+  EFI_PHYSICAL_ADDRESS Tables;
+  UINT32 TablesCount;
+  //
+  // Physical address of the E820 table, contains E820EntriesCount entries.
+  //
+  EFI_PHYSICAL_ADDRESS E820;
+  UINT32 E820EntriesCount;
+} EFI_XEN_OVMF_INFO;
+#pragma pack()
+
+#endif /* __XEN_H__ */