3 * Copyright (c) 2011-2015, ARM Limited. All rights reserved.
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
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.
17 #include <Library/ArmMmuLib.h>
18 #include <Library/ArmPlatformLib.h>
19 #include <Library/DebugLib.h>
20 #include <Library/HobLib.h>
21 #include <Library/MemoryAllocationLib.h>
22 #include <Library/PcdLib.h>
25 BuildMemoryTypeInformationHob (
32 IN ARM_MEMORY_REGION_DESCRIPTOR
*MemoryTable
36 VOID
*TranslationTableBase
;
37 UINTN TranslationTableSize
;
40 //Note: Because we called PeiServicesInstallPeiMemory() before to call InitMmu() the MMU Page Table resides in
41 // DRAM (even at the top of DRAM as it is the first permanent memory allocation)
42 Status
= ArmConfigureMmu (MemoryTable
, &TranslationTableBase
, &TranslationTableSize
);
43 if (EFI_ERROR (Status
)) {
44 DEBUG ((EFI_D_ERROR
, "Error: Failed to enable MMU\n"));
56 FileHandle - Handle of the file being invoked.
57 PeiServices - Describes the list of possible PEI Services.
61 Status - EFI_SUCCESS if the boot mode could be set
67 IN EFI_PHYSICAL_ADDRESS UefiMemoryBase
,
68 IN UINT64 UefiMemorySize
71 ARM_MEMORY_REGION_DESCRIPTOR
*MemoryTable
;
72 EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes
;
73 UINT64 ResourceLength
;
74 EFI_PEI_HOB_POINTERS NextHob
;
75 EFI_PHYSICAL_ADDRESS FdTop
;
76 EFI_PHYSICAL_ADDRESS SystemMemoryTop
;
77 EFI_PHYSICAL_ADDRESS ResourceTop
;
80 // Get Virtual Memory Map from the Platform Library
81 ArmPlatformGetVirtualMemoryMap (&MemoryTable
);
83 // Ensure PcdSystemMemorySize has been set
84 ASSERT (PcdGet64 (PcdSystemMemorySize
) != 0);
87 // Now, the permanent memory has been installed, we can call AllocatePages()
89 ResourceAttributes
= (
90 EFI_RESOURCE_ATTRIBUTE_PRESENT
|
91 EFI_RESOURCE_ATTRIBUTE_INITIALIZED
|
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
99 // Check if the resource for the main system memory has been declared
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
)))
111 NextHob
.Raw
= GET_NEXT_HOB (NextHob
);
115 // Reserved the memory space occupied by the firmware volume
116 BuildResourceDescriptorHob (
117 EFI_RESOURCE_SYSTEM_MEMORY
,
119 PcdGet64 (PcdSystemMemoryBase
),
120 PcdGet64 (PcdSystemMemorySize
)
125 // Reserved the memory space occupied by the firmware volume
128 SystemMemoryTop
= (EFI_PHYSICAL_ADDRESS
)PcdGet64 (PcdSystemMemoryBase
) + (EFI_PHYSICAL_ADDRESS
)PcdGet64 (PcdSystemMemorySize
);
129 FdTop
= (EFI_PHYSICAL_ADDRESS
)PcdGet64 (PcdFdBaseAddress
) + (EFI_PHYSICAL_ADDRESS
)PcdGet32 (PcdFdSize
);
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
)) {
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
))
143 ResourceAttributes
= NextHob
.ResourceDescriptor
->ResourceAttribute
;
144 ResourceLength
= NextHob
.ResourceDescriptor
->ResourceLength
;
145 ResourceTop
= NextHob
.ResourceDescriptor
->PhysicalStart
+ ResourceLength
;
147 if (PcdGet64 (PcdFdBaseAddress
) == NextHob
.ResourceDescriptor
->PhysicalStart
) {
148 if (SystemMemoryTop
== FdTop
) {
149 NextHob
.ResourceDescriptor
->ResourceAttribute
= ResourceAttributes
& ~EFI_RESOURCE_ATTRIBUTE_PRESENT
;
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
));
157 // Top of the FD is system memory available for UEFI
158 NextHob
.ResourceDescriptor
->PhysicalStart
+= PcdGet32(PcdFdSize
);
159 NextHob
.ResourceDescriptor
->ResourceLength
-= PcdGet32(PcdFdSize
);
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
));
169 NextHob
.ResourceDescriptor
->ResourceLength
= PcdGet64 (PcdFdBaseAddress
) - NextHob
.ResourceDescriptor
->PhysicalStart
;
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
,
177 ResourceTop
- FdTop
);
183 NextHob
.Raw
= GET_NEXT_HOB (NextHob
);
189 // Build Memory Allocation Hob
190 InitMmu (MemoryTable
);
192 if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob
)) {
193 // Optional feature that helps prevent EFI memory map fragmentation.
194 BuildMemoryTypeInformationHob ();