3 * Copyright (c) 2011, 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/ArmPlatformLib.h>
18 #include <Library/DebugLib.h>
19 #include <Library/HobLib.h>
20 #include <Library/MemoryAllocationLib.h>
21 #include <Library/PcdLib.h>
24 BuildMemoryTypeInformationHob (
33 ARM_MEMORY_REGION_DESCRIPTOR
*MemoryTable
;
34 VOID
*TranslationTableBase
;
35 UINTN TranslationTableSize
;
38 // Get Virtual Memory Map from the Platform Library
39 ArmPlatformGetVirtualMemoryMap (&MemoryTable
);
41 //Note: Because we called PeiServicesInstallPeiMemory() before to call InitMmu() the MMU Page Table resides in
42 // DRAM (even at the top of DRAM as it is the first permanent memory allocation)
43 Status
= ArmConfigureMmu (MemoryTable
, &TranslationTableBase
, &TranslationTableSize
);
44 if (EFI_ERROR (Status
)) {
45 DEBUG ((EFI_D_ERROR
, "Error: Failed to enable MMU\n"));
57 FileHandle - Handle of the file being invoked.
58 PeiServices - Describes the list of possible PEI Services.
62 Status - EFI_SUCCESS if the boot mode could be set
68 IN EFI_PHYSICAL_ADDRESS UefiMemoryBase
,
69 IN UINT64 UefiMemorySize
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 // Ensure PcdSystemMemorySize has been set
81 ASSERT (PcdGet32 (PcdSystemMemorySize
) != 0);
84 // Now, the permanent memory has been installed, we can call AllocatePages()
86 ResourceAttributes
= (
87 EFI_RESOURCE_ATTRIBUTE_PRESENT
|
88 EFI_RESOURCE_ATTRIBUTE_INITIALIZED
|
89 EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE
|
90 EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE
|
91 EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE
|
92 EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE
|
93 EFI_RESOURCE_ATTRIBUTE_TESTED
96 // Reserved the memory space occupied by the firmware volume
97 BuildResourceDescriptorHob (
98 EFI_RESOURCE_SYSTEM_MEMORY
,
100 PcdGet32 (PcdSystemMemoryBase
),
101 PcdGet32 (PcdSystemMemorySize
)
104 SystemMemoryTop
= (EFI_PHYSICAL_ADDRESS
)PcdGet32 (PcdSystemMemoryBase
) + (EFI_PHYSICAL_ADDRESS
)PcdGet32 (PcdSystemMemorySize
);
105 FdTop
= (EFI_PHYSICAL_ADDRESS
)PcdGet32(PcdFdBaseAddress
) + (EFI_PHYSICAL_ADDRESS
)PcdGet32(PcdFdSize
);
107 // EDK2 does not have the concept of boot firmware copied into DRAM. To avoid the DXE
108 // core to overwrite this area we must mark the region with the attribute non-present
109 if ((PcdGet32 (PcdFdBaseAddress
) >= PcdGet32 (PcdSystemMemoryBase
)) && (FdTop
<= SystemMemoryTop
)) {
112 // Search for System Memory Hob that contains the firmware
113 NextHob
.Raw
= GetHobList ();
114 while ((NextHob
.Raw
= GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR
, NextHob
.Raw
)) != NULL
) {
115 if ((NextHob
.ResourceDescriptor
->ResourceType
== EFI_RESOURCE_SYSTEM_MEMORY
) &&
116 (PcdGet32(PcdFdBaseAddress
) >= NextHob
.ResourceDescriptor
->PhysicalStart
) &&
117 (FdTop
<= NextHob
.ResourceDescriptor
->PhysicalStart
+ NextHob
.ResourceDescriptor
->ResourceLength
))
119 ResourceAttributes
= NextHob
.ResourceDescriptor
->ResourceAttribute
;
120 ResourceLength
= NextHob
.ResourceDescriptor
->ResourceLength
;
121 ResourceTop
= NextHob
.ResourceDescriptor
->PhysicalStart
+ ResourceLength
;
123 if (PcdGet32(PcdFdBaseAddress
) == NextHob
.ResourceDescriptor
->PhysicalStart
) {
124 if (SystemMemoryTop
== FdTop
) {
125 NextHob
.ResourceDescriptor
->ResourceAttribute
= ResourceAttributes
& ~EFI_RESOURCE_ATTRIBUTE_PRESENT
;
127 // Create the System Memory HOB for the firmware with the non-present attribute
128 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY
,
129 ResourceAttributes
& ~EFI_RESOURCE_ATTRIBUTE_PRESENT
,
130 PcdGet32(PcdFdBaseAddress
),
131 PcdGet32(PcdFdSize
));
133 // Top of the FD is system memory available for UEFI
134 NextHob
.ResourceDescriptor
->PhysicalStart
+= PcdGet32(PcdFdSize
);
135 NextHob
.ResourceDescriptor
->ResourceLength
-= PcdGet32(PcdFdSize
);
138 // Create the System Memory HOB for the firmware with the non-present attribute
139 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY
,
140 ResourceAttributes
& ~EFI_RESOURCE_ATTRIBUTE_PRESENT
,
141 PcdGet32(PcdFdBaseAddress
),
142 PcdGet32(PcdFdSize
));
145 NextHob
.ResourceDescriptor
->ResourceLength
= PcdGet32(PcdFdBaseAddress
) - NextHob
.ResourceDescriptor
->PhysicalStart
;
147 // If there is some memory available on the top of the FD then create a HOB
148 if (FdTop
< NextHob
.ResourceDescriptor
->PhysicalStart
+ ResourceLength
) {
149 // Create the System Memory HOB for the remaining region (top of the FD)
150 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY
,
153 ResourceTop
- FdTop
);
159 NextHob
.Raw
= GET_NEXT_HOB (NextHob
);
165 // Build Memory Allocation Hob
168 if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob
)) {
169 // Optional feature that helps prevent EFI memory map fragmentation.
170 BuildMemoryTypeInformationHob ();