ArmPlatformPkg/MemoryInitPeim: handle memory above 4 GB on 32-bit ARM
[mirror_edk2.git] / ArmPlatformPkg / MemoryInitPei / MemoryInitPeiLib.c
1 /** @file
2 *
3 * Copyright (c) 2011-2015, 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 <PiPei.h>
16
17 #include <Library/ArmPlatformLib.h>
18 #include <Library/DebugLib.h>
19 #include <Library/HobLib.h>
20 #include <Library/MemoryAllocationLib.h>
21 #include <Library/PcdLib.h>
22
23 VOID
24 BuildMemoryTypeInformationHob (
25 VOID
26 );
27
28 STATIC
29 VOID
30 InitMmu (
31 IN ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable
32 )
33 {
34
35 VOID *TranslationTableBase;
36 UINTN TranslationTableSize;
37 RETURN_STATUS Status;
38
39 //Note: Because we called PeiServicesInstallPeiMemory() before to call InitMmu() the MMU Page Table resides in
40 // DRAM (even at the top of DRAM as it is the first permanent memory allocation)
41 Status = ArmConfigureMmu (MemoryTable, &TranslationTableBase, &TranslationTableSize);
42 if (EFI_ERROR (Status)) {
43 DEBUG ((EFI_D_ERROR, "Error: Failed to enable MMU\n"));
44 }
45 }
46
47 /*++
48
49 Routine Description:
50
51
52
53 Arguments:
54
55 FileHandle - Handle of the file being invoked.
56 PeiServices - Describes the list of possible PEI Services.
57
58 Returns:
59
60 Status - EFI_SUCCESS if the boot mode could be set
61
62 --*/
63 EFI_STATUS
64 EFIAPI
65 MemoryPeim (
66 IN EFI_PHYSICAL_ADDRESS UefiMemoryBase,
67 IN UINT64 UefiMemorySize
68 )
69 {
70 ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable;
71 EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes;
72 UINT64 ResourceLength;
73 EFI_PEI_HOB_POINTERS NextHob;
74 EFI_PHYSICAL_ADDRESS FdTop;
75 EFI_PHYSICAL_ADDRESS SystemMemoryTop;
76 EFI_PHYSICAL_ADDRESS ResourceTop;
77 BOOLEAN Found;
78
79 // Get Virtual Memory Map from the Platform Library
80 ArmPlatformGetVirtualMemoryMap (&MemoryTable);
81
82 // Ensure PcdSystemMemorySize has been set
83 ASSERT (PcdGet64 (PcdSystemMemorySize) != 0);
84
85 //
86 // Now, the permanent memory has been installed, we can call AllocatePages()
87 //
88 ResourceAttributes = (
89 EFI_RESOURCE_ATTRIBUTE_PRESENT |
90 EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
91 EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
92 EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
93 EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
94 EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
95 EFI_RESOURCE_ATTRIBUTE_TESTED
96 );
97
98 //
99 // Check if the resource for the main system memory has been declared
100 //
101 Found = FALSE;
102 NextHob.Raw = GetHobList ();
103 while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {
104 if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
105 (PcdGet64 (PcdSystemMemoryBase) >= NextHob.ResourceDescriptor->PhysicalStart) &&
106 (NextHob.ResourceDescriptor->PhysicalStart + NextHob.ResourceDescriptor->ResourceLength <= PcdGet64 (PcdSystemMemoryBase) + PcdGet64 (PcdSystemMemorySize)))
107 {
108 Found = TRUE;
109 break;
110 }
111 NextHob.Raw = GET_NEXT_HOB (NextHob);
112 }
113
114 if (!Found) {
115 // Reserved the memory space occupied by the firmware volume
116 BuildResourceDescriptorHob (
117 EFI_RESOURCE_SYSTEM_MEMORY,
118 ResourceAttributes,
119 PcdGet64 (PcdSystemMemoryBase),
120 PcdGet64 (PcdSystemMemorySize)
121 );
122 }
123
124 //
125 // Reserved the memory space occupied by the firmware volume
126 //
127
128 SystemMemoryTop = (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdSystemMemoryBase) + (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdSystemMemorySize);
129 FdTop = (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdFdBaseAddress) + (EFI_PHYSICAL_ADDRESS)PcdGet32 (PcdFdSize);
130
131 // EDK2 does not have the concept of boot firmware copied into DRAM. To avoid the DXE
132 // core to overwrite this area we must mark the region with the attribute non-present
133 if ((PcdGet64 (PcdFdBaseAddress) >= PcdGet64 (PcdSystemMemoryBase)) && (FdTop <= SystemMemoryTop)) {
134 Found = FALSE;
135
136 // Search for System Memory Hob that contains the firmware
137 NextHob.Raw = GetHobList ();
138 while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {
139 if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
140 (PcdGet64 (PcdFdBaseAddress) >= NextHob.ResourceDescriptor->PhysicalStart) &&
141 (FdTop <= NextHob.ResourceDescriptor->PhysicalStart + NextHob.ResourceDescriptor->ResourceLength))
142 {
143 ResourceAttributes = NextHob.ResourceDescriptor->ResourceAttribute;
144 ResourceLength = NextHob.ResourceDescriptor->ResourceLength;
145 ResourceTop = NextHob.ResourceDescriptor->PhysicalStart + ResourceLength;
146
147 if (PcdGet64 (PcdFdBaseAddress) == NextHob.ResourceDescriptor->PhysicalStart) {
148 if (SystemMemoryTop == FdTop) {
149 NextHob.ResourceDescriptor->ResourceAttribute = ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT;
150 } else {
151 // Create the System Memory HOB for the firmware with the non-present attribute
152 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,
153 ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT,
154 PcdGet64 (PcdFdBaseAddress),
155 PcdGet32 (PcdFdSize));
156
157 // Top of the FD is system memory available for UEFI
158 NextHob.ResourceDescriptor->PhysicalStart += PcdGet32(PcdFdSize);
159 NextHob.ResourceDescriptor->ResourceLength -= PcdGet32(PcdFdSize);
160 }
161 } else {
162 // Create the System Memory HOB for the firmware with the non-present attribute
163 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,
164 ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT,
165 PcdGet64 (PcdFdBaseAddress),
166 PcdGet32 (PcdFdSize));
167
168 // Update the HOB
169 NextHob.ResourceDescriptor->ResourceLength = PcdGet64 (PcdFdBaseAddress) - NextHob.ResourceDescriptor->PhysicalStart;
170
171 // If there is some memory available on the top of the FD then create a HOB
172 if (FdTop < NextHob.ResourceDescriptor->PhysicalStart + ResourceLength) {
173 // Create the System Memory HOB for the remaining region (top of the FD)
174 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,
175 ResourceAttributes,
176 FdTop,
177 ResourceTop - FdTop);
178 }
179 }
180 Found = TRUE;
181 break;
182 }
183 NextHob.Raw = GET_NEXT_HOB (NextHob);
184 }
185
186 ASSERT(Found);
187 }
188
189 // Build Memory Allocation Hob
190 InitMmu (MemoryTable);
191
192 if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob)) {
193 // Optional feature that helps prevent EFI memory map fragmentation.
194 BuildMemoryTypeInformationHob ();
195 }
196
197 return EFI_SUCCESS;
198 }