ArmVirtualizationPkg: Xen/PV relocatable platformlib instance

Add a ArmPlatformLib instance that can deal with the self relocation and truly dynamic discovery of system RAM base and size. Contributed-under: TianoCore Contribution Agreement 1.0 Acked-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Olivier Martin <olivier.martin@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Laszlo Ersek <lersek@redhat.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16964 6f19259b-4bc3-4df7-8a09-765794883524
2015-02-28 20:31:28 +00:00
parent fc76a15cd7
commit f98490369f
5 changed files with 617 additions and 0 deletions
--- a/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmXenRelocatablePlatformLib/XenVirtMem.c
+++ b/ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmXenRelocatablePlatformLib/XenVirtMem.c
@@ -0,0 +1,83 @@
+/** @file
+*
+*  Copyright (c) 2014, Linaro Limited. 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.
+*
+**/
+
+#include <Library/ArmPlatformLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/PcdLib.h>
+#include <Library/IoLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <ArmPlatform.h>
+
+// Number of Virtual Memory Map Descriptors
+#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS          2
+
+// DDR attributes
+#define DDR_ATTRIBUTES_CACHED    ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
+#define DDR_ATTRIBUTES_UNCACHED  ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
+
+EFI_PHYSICAL_ADDRESS
+ArmGetPhysAddrTop (
+  VOID
+  );
+
+/**
+  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
+
+**/
+VOID
+ArmPlatformGetVirtualMemoryMap (
+  IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap
+  )
+{
+  ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
+
+  ASSERT (VirtualMemoryMap != NULL);
+
+  VirtualMemoryTable = AllocatePages (
+                         EFI_SIZE_TO_PAGES (
+                           sizeof (ARM_MEMORY_REGION_DESCRIPTOR)
+                           * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
+                           )
+                         );
+
+  if (VirtualMemoryTable == NULL) {
+    DEBUG ((EFI_D_ERROR, "%a: Error: Failed AllocatePages()\n", __FUNCTION__));
+    return;
+  }
+
+  //
+  // Map the entire physical memory space as cached. The only device
+  // we care about is the GIC, which will be stage 2 mapped as a device
+  // by the hypervisor, which will override the cached mapping we install
+  // here.
+  //
+  VirtualMemoryTable[0].PhysicalBase = 0x0;
+  VirtualMemoryTable[0].VirtualBase  = 0x0;
+  VirtualMemoryTable[0].Length       = ArmGetPhysAddrTop ();
+  VirtualMemoryTable[0].Attributes   = DDR_ATTRIBUTES_CACHED;
+
+  // End of Table
+  ZeroMem (&VirtualMemoryTable[1], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
+
+  *VirtualMemoryMap = VirtualMemoryTable;
+}