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_DESCRIPTOR *VirtualMemoryTable;
53
54 ASSERT (VirtualMemoryMap != NULL);
55
56 VirtualMemoryTable = AllocatePages (
57 EFI_SIZE_TO_PAGES (
58 sizeof (ARM_MEMORY_REGION_DESCRIPTOR)
59 * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
60 )
61 );
62
63 if (VirtualMemoryTable == NULL) {
64 DEBUG ((EFI_D_ERROR, "%a: Error: Failed AllocatePages()\n", __FUNCTION__));
65 return;
66 }
67
68 // System DRAM
69 VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
70 VirtualMemoryTable[0].VirtualBase = VirtualMemoryTable[0].PhysicalBase;
71 VirtualMemoryTable[0].Length = PcdGet64 (PcdSystemMemorySize);
72 VirtualMemoryTable[0].Attributes = DDR_ATTRIBUTES_CACHED;
73
74 DEBUG ((EFI_D_INFO, "%a: Dumping System DRAM Memory Map:\n"
75 "\tPhysicalBase: 0x%lX\n"
76 "\tVirtualBase: 0x%lX\n"
77 "\tLength: 0x%lX\n",
78 __FUNCTION__,
79 VirtualMemoryTable[0].PhysicalBase,
80 VirtualMemoryTable[0].VirtualBase,
81 VirtualMemoryTable[0].Length));
82
83 // Peripheral space before DRAM
84 VirtualMemoryTable[1].PhysicalBase = 0x0;
85 VirtualMemoryTable[1].VirtualBase = 0x0;
86 VirtualMemoryTable[1].Length = VirtualMemoryTable[0].PhysicalBase;
87 VirtualMemoryTable[1].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
88
89 // Peripheral space after DRAM
90 VirtualMemoryTable[2].PhysicalBase = VirtualMemoryTable[0].Length + VirtualMemoryTable[1].Length;
91 VirtualMemoryTable[2].VirtualBase = VirtualMemoryTable[2].PhysicalBase;
92 VirtualMemoryTable[2].Length = MIN (1ULL << FixedPcdGet8 (PcdPrePiCpuMemorySize),
93 ArmGetPhysAddrTop ()) -
94 VirtualMemoryTable[2].PhysicalBase;
95 VirtualMemoryTable[2].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
96
97 // Remap the FD region as normal executable memory
98 VirtualMemoryTable[3].PhysicalBase = PcdGet64 (PcdFdBaseAddress);
99 VirtualMemoryTable[3].VirtualBase = VirtualMemoryTable[3].PhysicalBase;
100 VirtualMemoryTable[3].Length = FixedPcdGet32 (PcdFdSize);
101 VirtualMemoryTable[3].Attributes = DDR_ATTRIBUTES_CACHED;
102
103 // End of Table
104 ZeroMem (&VirtualMemoryTable[4], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
105
106 *VirtualMemoryMap = VirtualMemoryTable;
107 }
108