1 /** @file
2 *
3 *  Copyright (c) 2011, ARM Limited. All rights reserved.
4 *
5 *  This program and the accompanying materials
6 *  are licensed and made available under the terms and conditions of the BSD License
7 *  which accompanies this distribution.  The full text of the license may be found at
8 *  http://opensource.org/licenses/bsd-license.php
9 *
10 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12 *
13 **/
14 
15 #include <Library/ArmPlatformLib.h>
16 #include <Library/DebugLib.h>
17 #include <Library/PcdLib.h>
18 #include <Library/MemoryAllocationLib.h>
19 #include <Library/IoLib.h>
20 
21 #include <BeagleBoard.h>
22 
23 #define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS          4
24 
25 /**
26   Return the Virtual Memory Map of your platform
27 
28   This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU on your platform.
29 
30   @param[out]   VirtualMemoryMap    Array of ARM_MEMORY_REGION_DESCRIPTOR describing a Physical-to-
31                                     Virtual Memory mapping. This array must be ended by a zero-filled
32                                     entry
33 
34 **/
35 VOID
ArmPlatformGetVirtualMemoryMap(IN ARM_MEMORY_REGION_DESCRIPTOR ** VirtualMemoryMap)36 ArmPlatformGetVirtualMemoryMap (
37   IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap
38   )
39 {
40   ARM_MEMORY_REGION_ATTRIBUTES  CacheAttributes;
41   UINTN                         Index = 0;
42   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
43 
44   ASSERT(VirtualMemoryMap != NULL);
45 
46   VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR*)AllocatePages(EFI_SIZE_TO_PAGES (sizeof(ARM_MEMORY_REGION_DESCRIPTOR) * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS));
47   if (VirtualMemoryTable == NULL) {
48     return;
49   }
50 
51   if (FeaturePcdGet(PcdCacheEnable) == TRUE) {
52     CacheAttributes = DDR_ATTRIBUTES_CACHED;
53   } else {
54     CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
55   }
56 
57   // ReMap (Either NOR Flash or DRAM)
58   VirtualMemoryTable[Index].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
59   VirtualMemoryTable[Index].VirtualBase  = PcdGet64 (PcdSystemMemoryBase);
60   VirtualMemoryTable[Index].Length       = PcdGet64 (PcdSystemMemorySize);
61   VirtualMemoryTable[Index].Attributes   = CacheAttributes;
62 
63   // SOC Registers. L3 interconnects
64   VirtualMemoryTable[++Index].PhysicalBase = SOC_REGISTERS_L3_PHYSICAL_BASE;
65   VirtualMemoryTable[Index].VirtualBase  = SOC_REGISTERS_L3_PHYSICAL_BASE;
66   VirtualMemoryTable[Index].Length       = SOC_REGISTERS_L3_PHYSICAL_LENGTH;
67   VirtualMemoryTable[Index].Attributes   = SOC_REGISTERS_L3_ATTRIBUTES;
68 
69   // SOC Registers. L4 interconnects
70   VirtualMemoryTable[++Index].PhysicalBase = SOC_REGISTERS_L4_PHYSICAL_BASE;
71   VirtualMemoryTable[Index].VirtualBase  = SOC_REGISTERS_L4_PHYSICAL_BASE;
72   VirtualMemoryTable[Index].Length       = SOC_REGISTERS_L4_PHYSICAL_LENGTH;
73   VirtualMemoryTable[Index].Attributes   = SOC_REGISTERS_L4_ATTRIBUTES;
74 
75   // End of Table
76   VirtualMemoryTable[++Index].PhysicalBase = 0;
77   VirtualMemoryTable[Index].VirtualBase  = 0;
78   VirtualMemoryTable[Index].Length       = 0;
79   VirtualMemoryTable[Index].Attributes   = (ARM_MEMORY_REGION_ATTRIBUTES)0;
80 
81   ASSERT((Index + 1) == MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
82 
83   *VirtualMemoryMap = VirtualMemoryTable;
84 }
85