1 /** @file
2 *
3 * Copyright (c) 2014, Linaro 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/BaseMemoryLib.h>
18 #include <Library/PcdLib.h>
19 #include <Library/IoLib.h>
20 #include <Library/MemoryAllocationLib.h>
21 #include <ArmPlatform.h>
22
23 // Number of Virtual Memory Map Descriptors
24 #define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 5
25
26 // DDR attributes
27 #define DDR_ATTRIBUTES_CACHED ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
28 #define DDR_ATTRIBUTES_UNCACHED ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
29
30 EFI_PHYSICAL_ADDRESS
31 ArmGetPhysAddrTop (
32 VOID
33 );
34
35 /**
36 Return the Virtual Memory Map of your platform
37
38 This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
39 on your platform.
40
41 @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
42 describing a Physical-to-Virtual Memory
43 mapping. This array must be ended by a
44 zero-filled entry
45
46 **/
47 VOID
ArmPlatformGetVirtualMemoryMap(IN ARM_MEMORY_REGION_DESCRIPTOR ** VirtualMemoryMap)48 ArmPlatformGetVirtualMemoryMap (
49 IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap
50 )
51 {
52 ARM_MEMORY_REGION_ATTRIBUTES CacheAttributes;
53 ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
54
55 ASSERT (VirtualMemoryMap != NULL);
56
57 VirtualMemoryTable = AllocatePages (
58 EFI_SIZE_TO_PAGES (
59 sizeof (ARM_MEMORY_REGION_DESCRIPTOR)
60 * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
61 )
62 );
63
64 if (VirtualMemoryTable == NULL) {
65 DEBUG ((EFI_D_ERROR, "%a: Error: Failed AllocatePages()\n", __FUNCTION__));
66 return;
67 }
68
69 if (FeaturePcdGet (PcdCacheEnable) == TRUE) {
70 CacheAttributes = DDR_ATTRIBUTES_CACHED;
71 } else {
72 CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
73 }
74
75 // System DRAM
76 VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
77 VirtualMemoryTable[0].VirtualBase = VirtualMemoryTable[0].PhysicalBase;
78 VirtualMemoryTable[0].Length = PcdGet64 (PcdSystemMemorySize);
79 VirtualMemoryTable[0].Attributes = CacheAttributes;
80
81 DEBUG ((EFI_D_INFO, "%a: Dumping System DRAM Memory Map:\n"
82 "\tPhysicalBase: 0x%lX\n"
83 "\tVirtualBase: 0x%lX\n"
84 "\tLength: 0x%lX\n",
85 __FUNCTION__,
86 VirtualMemoryTable[0].PhysicalBase,
87 VirtualMemoryTable[0].VirtualBase,
88 VirtualMemoryTable[0].Length));
89
90 // Peripheral space before DRAM
91 VirtualMemoryTable[1].PhysicalBase = 0x0;
92 VirtualMemoryTable[1].VirtualBase = 0x0;
93 VirtualMemoryTable[1].Length = VirtualMemoryTable[0].PhysicalBase;
94 VirtualMemoryTable[1].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
95
96 // Peripheral space after DRAM
97 VirtualMemoryTable[2].PhysicalBase = VirtualMemoryTable[0].Length + VirtualMemoryTable[1].Length;
98 VirtualMemoryTable[2].VirtualBase = VirtualMemoryTable[2].PhysicalBase;
99 VirtualMemoryTable[2].Length = MIN (1ULL << FixedPcdGet8 (PcdPrePiCpuMemorySize),
100 ArmGetPhysAddrTop ()) -
101 VirtualMemoryTable[2].PhysicalBase;
102 VirtualMemoryTable[2].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
103
104 // Remap the FD region as normal executable memory
105 VirtualMemoryTable[3].PhysicalBase = FixedPcdGet64 (PcdFdBaseAddress);
106 VirtualMemoryTable[3].VirtualBase = VirtualMemoryTable[3].PhysicalBase;
107 VirtualMemoryTable[3].Length = FixedPcdGet32 (PcdFdSize);
108 VirtualMemoryTable[3].Attributes = CacheAttributes;
109
110 // End of Table
111 ZeroMem (&VirtualMemoryTable[4], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
112
113 *VirtualMemoryMap = VirtualMemoryTable;
114 }
115