[PATCH v2 09/14] ArmVirtPkg: introduce ArmVirtMemInfoLib library class

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

As part of the effort to get rid of ArmPlatformLib (which incorporates
far too many duties in a single library), introduce ArmVirtMemInfoLib
which will be invoked by our ArmVirtMemoryInitPeiLib implementation to
get a description of the virtual address space. This will allow us to
remove this functionality from ArmPlatformLib later, or, in the case of
ArmVirtXen and ArmVirtQemuKernel, drop ArmPlatformLib altogether.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 ArmVirtPkg/ArmVirtPkg.dec                      |  3 ++
 ArmVirtPkg/Include/Library/ArmVirtMemInfoLib.h | 41 ++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/ArmVirtPkg/ArmVirtPkg.dec b/ArmVirtPkg/ArmVirtPkg.dec
index a8603e1b80e5..8f656fd2739d 100644
--- a/ArmVirtPkg/ArmVirtPkg.dec
+++ b/ArmVirtPkg/ArmVirtPkg.dec
@@ -30,6 +30,9 @@ [Defines]
 [Includes.common]
   Include                        # Root include for the package
 
+[LibraryClasses]
+  ArmVirtMemInfoLib|Include/Library/ArmVirtMemInfoLib.h
+
 [Guids.common]
   gArmVirtTokenSpaceGuid = { 0x0B6F5CA7, 0x4F53, 0x445A, { 0xB7, 0x6E, 0x2E, 0x36, 0x5B, 0x80, 0x63, 0x66 } }
   gEarlyPL011BaseAddressGuid       = { 0xB199DEA9, 0xFD5C, 0x4A84, { 0x80, 0x82, 0x2F, 0x41, 0x70, 0x78, 0x03, 0x05 } }
diff --git a/ArmVirtPkg/Include/Library/ArmVirtMemInfoLib.h b/ArmVirtPkg/Include/Library/ArmVirtMemInfoLib.h
new file mode 100644
index 000000000000..bdf1c513bc6d
--- /dev/null
+++ b/ArmVirtPkg/Include/Library/ArmVirtMemInfoLib.h
@@ -0,0 +1,41 @@
+/** @file
+
+  Copyright (c) 2011-2013, ARM Limited. All rights reserved.
+  Copyright (c) 2017, Linaro, Ltd. 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 _ARM_VIRT_MEMINFO_LIB_H_
+#define _ARM_VIRT_MEMINFO_LIB_H_
+
+#include <Base.h>
+#include <Library/ArmLib.h>
+
+/**
+  Return the Virtual Memory Map of your platform
+
+  This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
+  on your platform.
+
+  @param[out]   VirtualMemoryMap    Array of ARM_MEMORY_REGION_DESCRIPTOR
+                                    describing a Physical-to-Virtual Memory
+                                    mapping. This array must be ended by a
+                                    zero-filled entry. The allocated memory
+                                    will not be freed.
+
+**/
+VOID
+EFIAPI
+ArmVirtGetMemoryMap (
+  OUT ARM_MEMORY_REGION_DESCRIPTOR    **VirtualMemoryMap
+  );
+
+#endif
-- 
2.11.0