summaryrefslogtreecommitdiff
path: root/ArmPlatformPkg/MemoryInitPei/MemoryInitPeiLib.c
blob: e5dd29c7e1e50e4ecf5afe5d163bb70530542fc8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/** @file
*
*  Copyright (c) 2011, ARM 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 <PiPei.h>

#include <Library/ArmPlatformLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PcdLib.h>

VOID
BuildMemoryTypeInformationHob (
  VOID
  );

VOID
InitMmu (
  VOID
  )
{
  ARM_MEMORY_REGION_DESCRIPTOR  *MemoryTable;
  VOID                          *TranslationTableBase;
  UINTN                         TranslationTableSize;

  // Get Virtual Memory Map from the Platform Library
  ArmPlatformGetVirtualMemoryMap(&MemoryTable);

  //Note: Because we called PeiServicesInstallPeiMemory() before to call InitMmu() the MMU Page Table resides in
  //      DRAM (even at the top of DRAM as it is the first permanent memory allocation)
  ArmConfigureMmu (MemoryTable, &TranslationTableBase, &TranslationTableSize);
}

/*++

Routine Description:



Arguments:

  FileHandle  - Handle of the file being invoked.
  PeiServices - Describes the list of possible PEI Services.

Returns:

  Status -  EFI_SUCCESS if the boot mode could be set

--*/
EFI_STATUS
EFIAPI
MemoryPeim (
  IN EFI_PHYSICAL_ADDRESS               UefiMemoryBase,
  IN UINT64                             UefiMemorySize
  )
{
  EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes;
  UINT64                      ResourceLength;
  EFI_PEI_HOB_POINTERS        NextHob;
  EFI_PHYSICAL_ADDRESS        FdTop;
  EFI_PHYSICAL_ADDRESS        SystemMemoryTop;
  EFI_PHYSICAL_ADDRESS        ResourceTop;
  BOOLEAN                     Found;

  // Ensure PcdSystemMemorySize has been set
  ASSERT (PcdGet32 (PcdSystemMemorySize) != 0);

  //
  // Now, the permanent memory has been installed, we can call AllocatePages()
  //
  ResourceAttributes = (
      EFI_RESOURCE_ATTRIBUTE_PRESENT |
      EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
      EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
      EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
      EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
      EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
      EFI_RESOURCE_ATTRIBUTE_TESTED
  );

  // Reserved the memory space occupied by the firmware volume
  BuildResourceDescriptorHob (
      EFI_RESOURCE_SYSTEM_MEMORY,
      ResourceAttributes,
      PcdGet32 (PcdSystemMemoryBase),
      PcdGet32 (PcdSystemMemorySize)
  );

  SystemMemoryTop = PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize);
  FdTop = PcdGet32(PcdFdBaseAddress) + PcdGet32(PcdFdSize);

  // EDK2 does not have the concept of boot firmware copied into DRAM. To avoid the DXE
  // core to overwrite this area we must mark the region with the attribute non-present
  if ((PcdGet32 (PcdFdBaseAddress) >= PcdGet32 (PcdSystemMemoryBase)) && (FdTop <= SystemMemoryTop)) {
    Found = FALSE;

    // Search for System Memory Hob that contains the firmware
    NextHob.Raw = GetHobList ();
    while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {
      if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
          (PcdGet32(PcdFdBaseAddress) >= NextHob.ResourceDescriptor->PhysicalStart) &&
          (FdTop <= NextHob.ResourceDescriptor->PhysicalStart + NextHob.ResourceDescriptor->ResourceLength))
      {
        ResourceAttributes = NextHob.ResourceDescriptor->ResourceAttribute;
        ResourceLength = NextHob.ResourceDescriptor->ResourceLength;
        ResourceTop = NextHob.ResourceDescriptor->PhysicalStart + ResourceLength;

        if (PcdGet32(PcdFdBaseAddress) == NextHob.ResourceDescriptor->PhysicalStart) {
          if (SystemMemoryTop == FdTop) {
            NextHob.ResourceDescriptor->ResourceAttribute = ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT;
          } else {
            // Create the System Memory HOB for the firmware with the non-present attribute
            BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,
                                        ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT,
                                        PcdGet32(PcdFdBaseAddress),
                                        PcdGet32(PcdFdSize));

            // Top of the FD is system memory available for UEFI
            NextHob.ResourceDescriptor->PhysicalStart += PcdGet32(PcdFdSize);
            NextHob.ResourceDescriptor->ResourceLength -= PcdGet32(PcdFdSize);
          }
        } else {
          // Create the System Memory HOB for the firmware with the non-present attribute
          BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,
                                      ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT,
                                      PcdGet32(PcdFdBaseAddress),
                                      PcdGet32(PcdFdSize));

          // Update the HOB
          NextHob.ResourceDescriptor->ResourceLength = PcdGet32(PcdFdBaseAddress) - NextHob.ResourceDescriptor->PhysicalStart;

          // If there is some memory available on the top of the FD then create a HOB
          if (FdTop < NextHob.ResourceDescriptor->PhysicalStart + ResourceLength) {
            // Create the System Memory HOB for the remaining region (top of the FD)
            BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,
                                        ResourceAttributes,
                                        FdTop,
                                        ResourceTop - FdTop);
          }
        }
        Found = TRUE;
        break;
      }
      NextHob.Raw = GET_NEXT_HOB (NextHob);
    }

    ASSERT(Found);
  }

  // Build Memory Allocation Hob
  InitMmu ();

  if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob)) {
    // Optional feature that helps prevent EFI memory map fragmentation.
    BuildMemoryTypeInformationHob ();
  }

  return EFI_SUCCESS;
}