ArmVirtPkg/ArmVirtXen: add ArmVirtMemInfoLib implementation

[mirror_edk2.git] / ArmVirtPkg / Library / XenVirtMemInfoLib / XenVirtMemInfoLib.c

diff --git a/ArmVirtPkg/Library/XenVirtMemInfoLib/XenVirtMemInfoLib.c b/ArmVirtPkg/Library/XenVirtMemInfoLib/XenVirtMemInfoLib.c
new file mode 100644 (file)
index 0000000..88ff316
--- /dev/null
+++ b/ArmVirtPkg/Library/XenVirtMemInfoLib/XenVirtMemInfoLib.c
@@ -0,0 +1,63 @@
+/** @file\r
+\r
+  Copyright (c) 2014-2017, Linaro Limited. All rights reserved.\r
+\r
+  This program and the accompanying materials are licensed and made available\r
+  under the terms and conditions of the BSD License which accompanies this\r
+  distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php\r
+\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#include <Base.h>\r
+#include <Library/ArmLib.h>\r
+#include <Library/DebugLib.h>\r
+\r
+STATIC ARM_MEMORY_REGION_DESCRIPTOR  mVirtualMemoryTable[2];\r
+\r
+EFI_PHYSICAL_ADDRESS\r
+ArmGetPhysAddrTop (\r
+  VOID\r
+  );\r
+\r
+/**\r
+  Return the Virtual Memory Map of your platform\r
+\r
+  This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU\r
+  on your platform.\r
+\r
+  @param[out]   VirtualMemoryMap    Array of ARM_MEMORY_REGION_DESCRIPTOR\r
+                                    describing a Physical-to-Virtual Memory\r
+                                    mapping. This array must be ended by a\r
+                                    zero-filled entry. The allocated memory\r
+                                    will not be freed.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+ArmVirtGetMemoryMap (\r
+  OUT ARM_MEMORY_REGION_DESCRIPTOR   **VirtualMemoryMap\r
+  )\r
+{\r
+  ASSERT (VirtualMemoryMap != NULL);\r
+\r
+  //\r
+  // Map the entire physical memory space as cached. The only device\r
+  // we care about is the GIC, which will be stage 2 mapped as a device\r
+  // by the hypervisor, overriding the cached mapping we install here.\r
+  //\r
+  mVirtualMemoryTable[0].PhysicalBase = 0x0;\r
+  mVirtualMemoryTable[0].VirtualBase  = 0x0;\r
+  mVirtualMemoryTable[0].Length       = ArmGetPhysAddrTop ();\r
+  mVirtualMemoryTable[0].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;\r
+\r
+  mVirtualMemoryTable[1].PhysicalBase = 0x0;\r
+  mVirtualMemoryTable[1].VirtualBase  = 0x0;\r
+  mVirtualMemoryTable[1].Length       = 0x0;\r
+  mVirtualMemoryTable[1].Attributes   = 0x0;\r
+\r
+  *VirtualMemoryMap = mVirtualMemoryTable;\r
+}\r