ArmVirtPkg: introduce new ArmQemuRelocatablePlatformLib

This introduces ArmQemuRelocatablePlatformLib, which started out as a straight copy of ArmXenRelocatablePlatformLib, but has been modified so that ArmVirtPkg/PrePi/ArmVirtPrePiUniCoreRelocatable.inf can be used with QEMU as well as with Xen. It retains the self relocation and FDT parsing for the system memory, but uses the QEMU MMU layout. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Laszlo Ersek <lersek@redhat.com>
2016-02-05 14:54:42 +01:00
parent ff05707ef2
commit 577393c272
6 changed files with 632 additions and 0 deletions
--- a/ArmVirtPkg/Library/ArmQemuRelocatablePlatformLib/QemuVirtMem.c
+++ b/ArmVirtPkg/Library/ArmQemuRelocatablePlatformLib/QemuVirtMem.c
@@ -0,0 +1,107 @@
+/** @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          5
+
+// 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;
+  }
+
+  // System DRAM
+  VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
+  VirtualMemoryTable[0].VirtualBase  = VirtualMemoryTable[0].PhysicalBase;
+  VirtualMemoryTable[0].Length       = PcdGet64 (PcdSystemMemorySize);
+  VirtualMemoryTable[0].Attributes   = DDR_ATTRIBUTES_CACHED;
+
+  DEBUG ((EFI_D_INFO, "%a: Dumping System DRAM Memory Map:\n"
+      "\tPhysicalBase: 0x%lX\n"
+      "\tVirtualBase: 0x%lX\n"
+      "\tLength: 0x%lX\n",
+      __FUNCTION__,
+      VirtualMemoryTable[0].PhysicalBase,
+      VirtualMemoryTable[0].VirtualBase,
+      VirtualMemoryTable[0].Length));
+
+  // Peripheral space before DRAM
+  VirtualMemoryTable[1].PhysicalBase = 0x0;
+  VirtualMemoryTable[1].VirtualBase  = 0x0;
+  VirtualMemoryTable[1].Length       = VirtualMemoryTable[0].PhysicalBase;
+  VirtualMemoryTable[1].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+  // Peripheral space after DRAM
+  VirtualMemoryTable[2].PhysicalBase = VirtualMemoryTable[0].Length + VirtualMemoryTable[1].Length;
+  VirtualMemoryTable[2].VirtualBase  = VirtualMemoryTable[2].PhysicalBase;
+  VirtualMemoryTable[2].Length       = MIN (1ULL << FixedPcdGet8 (PcdPrePiCpuMemorySize),
+                                         ArmGetPhysAddrTop ()) -
+                                       VirtualMemoryTable[2].PhysicalBase;
+  VirtualMemoryTable[2].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+  // Remap the FD region as normal executable memory
+  VirtualMemoryTable[3].PhysicalBase = PcdGet64 (PcdFdBaseAddress);
+  VirtualMemoryTable[3].VirtualBase  = VirtualMemoryTable[3].PhysicalBase;
+  VirtualMemoryTable[3].Length       = FixedPcdGet32 (PcdFdSize);
+  VirtualMemoryTable[3].Attributes   = DDR_ATTRIBUTES_CACHED;
+
+  // End of Table
+  ZeroMem (&VirtualMemoryTable[4], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
+
+  *VirtualMemoryMap = VirtualMemoryTable;
+}