3 * Copyright (c) 2011-2015, ARM Limited. All rights reserved.
5 * SPDX-License-Identifier: BSD-2-Clause-Patent
11 #include <Library/ArmMmuLib.h>
12 #include <Library/ArmPlatformLib.h>
13 #include <Library/DebugLib.h>
14 #include <Library/HobLib.h>
15 #include <Library/MemoryAllocationLib.h>
16 #include <Library/PcdLib.h>
19 BuildMemoryTypeInformationHob (
26 IN ARM_MEMORY_REGION_DESCRIPTOR
*MemoryTable
30 VOID
*TranslationTableBase
;
31 UINTN TranslationTableSize
;
34 //Note: Because we called PeiServicesInstallPeiMemory() before to call InitMmu() the MMU Page Table resides in
35 // DRAM (even at the top of DRAM as it is the first permanent memory allocation)
36 Status
= ArmConfigureMmu (MemoryTable
, &TranslationTableBase
, &TranslationTableSize
);
37 if (EFI_ERROR (Status
)) {
38 DEBUG ((EFI_D_ERROR
, "Error: Failed to enable MMU\n"));
50 FileHandle - Handle of the file being invoked.
51 PeiServices - Describes the list of possible PEI Services.
55 Status - EFI_SUCCESS if the boot mode could be set
61 IN EFI_PHYSICAL_ADDRESS UefiMemoryBase
,
62 IN UINT64 UefiMemorySize
65 ARM_MEMORY_REGION_DESCRIPTOR
*MemoryTable
;
66 EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes
;
67 UINT64 ResourceLength
;
68 EFI_PEI_HOB_POINTERS NextHob
;
69 EFI_PHYSICAL_ADDRESS FdTop
;
70 EFI_PHYSICAL_ADDRESS SystemMemoryTop
;
71 EFI_PHYSICAL_ADDRESS ResourceTop
;
74 // Get Virtual Memory Map from the Platform Library
75 ArmPlatformGetVirtualMemoryMap (&MemoryTable
);
77 // Ensure PcdSystemMemorySize has been set
78 ASSERT (PcdGet64 (PcdSystemMemorySize
) != 0);
81 // Now, the permanent memory has been installed, we can call AllocatePages()
83 ResourceAttributes
= (
84 EFI_RESOURCE_ATTRIBUTE_PRESENT
|
85 EFI_RESOURCE_ATTRIBUTE_INITIALIZED
|
86 EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE
|
87 EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE
|
88 EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE
|
89 EFI_RESOURCE_ATTRIBUTE_TESTED
93 // Check if the resource for the main system memory has been declared
96 NextHob
.Raw
= GetHobList ();
97 while ((NextHob
.Raw
= GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR
, NextHob
.Raw
)) != NULL
) {
98 if ((NextHob
.ResourceDescriptor
->ResourceType
== EFI_RESOURCE_SYSTEM_MEMORY
) &&
99 (PcdGet64 (PcdSystemMemoryBase
) >= NextHob
.ResourceDescriptor
->PhysicalStart
) &&
100 (NextHob
.ResourceDescriptor
->PhysicalStart
+ NextHob
.ResourceDescriptor
->ResourceLength
<= PcdGet64 (PcdSystemMemoryBase
) + PcdGet64 (PcdSystemMemorySize
)))
105 NextHob
.Raw
= GET_NEXT_HOB (NextHob
);
109 // Reserved the memory space occupied by the firmware volume
110 BuildResourceDescriptorHob (
111 EFI_RESOURCE_SYSTEM_MEMORY
,
113 PcdGet64 (PcdSystemMemoryBase
),
114 PcdGet64 (PcdSystemMemorySize
)
119 // Reserved the memory space occupied by the firmware volume
122 SystemMemoryTop
= (EFI_PHYSICAL_ADDRESS
)PcdGet64 (PcdSystemMemoryBase
) + (EFI_PHYSICAL_ADDRESS
)PcdGet64 (PcdSystemMemorySize
);
123 FdTop
= (EFI_PHYSICAL_ADDRESS
)PcdGet64 (PcdFdBaseAddress
) + (EFI_PHYSICAL_ADDRESS
)PcdGet32 (PcdFdSize
);
125 // EDK2 does not have the concept of boot firmware copied into DRAM. To avoid the DXE
126 // core to overwrite this area we must mark the region with the attribute non-present
127 if ((PcdGet64 (PcdFdBaseAddress
) >= PcdGet64 (PcdSystemMemoryBase
)) && (FdTop
<= SystemMemoryTop
)) {
130 // Search for System Memory Hob that contains the firmware
131 NextHob
.Raw
= GetHobList ();
132 while ((NextHob
.Raw
= GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR
, NextHob
.Raw
)) != NULL
) {
133 if ((NextHob
.ResourceDescriptor
->ResourceType
== EFI_RESOURCE_SYSTEM_MEMORY
) &&
134 (PcdGet64 (PcdFdBaseAddress
) >= NextHob
.ResourceDescriptor
->PhysicalStart
) &&
135 (FdTop
<= NextHob
.ResourceDescriptor
->PhysicalStart
+ NextHob
.ResourceDescriptor
->ResourceLength
))
137 ResourceAttributes
= NextHob
.ResourceDescriptor
->ResourceAttribute
;
138 ResourceLength
= NextHob
.ResourceDescriptor
->ResourceLength
;
139 ResourceTop
= NextHob
.ResourceDescriptor
->PhysicalStart
+ ResourceLength
;
141 if (PcdGet64 (PcdFdBaseAddress
) == NextHob
.ResourceDescriptor
->PhysicalStart
) {
142 if (SystemMemoryTop
== FdTop
) {
143 NextHob
.ResourceDescriptor
->ResourceAttribute
= ResourceAttributes
& ~EFI_RESOURCE_ATTRIBUTE_PRESENT
;
145 // Create the System Memory HOB for the firmware with the non-present attribute
146 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY
,
147 ResourceAttributes
& ~EFI_RESOURCE_ATTRIBUTE_PRESENT
,
148 PcdGet64 (PcdFdBaseAddress
),
149 PcdGet32 (PcdFdSize
));
151 // Top of the FD is system memory available for UEFI
152 NextHob
.ResourceDescriptor
->PhysicalStart
+= PcdGet32(PcdFdSize
);
153 NextHob
.ResourceDescriptor
->ResourceLength
-= PcdGet32(PcdFdSize
);
156 // Create the System Memory HOB for the firmware with the non-present attribute
157 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY
,
158 ResourceAttributes
& ~EFI_RESOURCE_ATTRIBUTE_PRESENT
,
159 PcdGet64 (PcdFdBaseAddress
),
160 PcdGet32 (PcdFdSize
));
163 NextHob
.ResourceDescriptor
->ResourceLength
= PcdGet64 (PcdFdBaseAddress
) - NextHob
.ResourceDescriptor
->PhysicalStart
;
165 // If there is some memory available on the top of the FD then create a HOB
166 if (FdTop
< NextHob
.ResourceDescriptor
->PhysicalStart
+ ResourceLength
) {
167 // Create the System Memory HOB for the remaining region (top of the FD)
168 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY
,
171 ResourceTop
- FdTop
);
177 NextHob
.Raw
= GET_NEXT_HOB (NextHob
);
183 // Build Memory Allocation Hob
184 InitMmu (MemoryTable
);
186 if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob
)) {
187 // Optional feature that helps prevent EFI memory map fragmentation.
188 BuildMemoryTypeInformationHob ();