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[mirror_edk2.git] / ArmPlatformPkg / MemoryInitPei / MemoryInitPeiLib.c
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3a6eaccf 1/** @file\r
2*\r
3* Copyright (c) 2011, ARM Limited. All rights reserved.\r
4*\r
5* This program and the accompanying materials\r
6* are licensed and made available under the terms and conditions of the BSD License\r
7* which accompanies this distribution. The full text of the license may be found at\r
8* http://opensource.org/licenses/bsd-license.php\r
9*\r
10* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
11* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
12*\r
13**/\r
14\r
15#include <PiPei.h>\r
16\r
17#include <Library/ArmPlatformLib.h>\r
18#include <Library/DebugLib.h>\r
19#include <Library/HobLib.h>\r
20#include <Library/MemoryAllocationLib.h>\r
21#include <Library/PcdLib.h>\r
22\r
3a6eaccf 23VOID\r
24BuildMemoryTypeInformationHob (\r
25 VOID\r
26 );\r
27\r
28VOID\r
29InitMmu (\r
30 VOID\r
31 )\r
32{\r
33 ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable;\r
34 VOID *TranslationTableBase;\r
35 UINTN TranslationTableSize;\r
36\r
37 // Get Virtual Memory Map from the Platform Library\r
b34e4db3 38 ArmPlatformGetVirtualMemoryMap (&MemoryTable);\r
3a6eaccf 39\r
40 //Note: Because we called PeiServicesInstallPeiMemory() before to call InitMmu() the MMU Page Table resides in\r
41 // DRAM (even at the top of DRAM as it is the first permanent memory allocation)\r
42 ArmConfigureMmu (MemoryTable, &TranslationTableBase, &TranslationTableSize);\r
43}\r
44\r
45/*++\r
46\r
47Routine Description:\r
48\r
49\r
50\r
51Arguments:\r
52\r
53 FileHandle - Handle of the file being invoked.\r
54 PeiServices - Describes the list of possible PEI Services.\r
55\r
56Returns:\r
57\r
58 Status - EFI_SUCCESS if the boot mode could be set\r
59\r
60--*/\r
61EFI_STATUS\r
62EFIAPI\r
63MemoryPeim (\r
64 IN EFI_PHYSICAL_ADDRESS UefiMemoryBase,\r
65 IN UINT64 UefiMemorySize\r
66 )\r
67{\r
d269095b 68 EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes;\r
69 UINT64 ResourceLength;\r
70 EFI_PEI_HOB_POINTERS NextHob;\r
71 EFI_PHYSICAL_ADDRESS FdTop;\r
72 EFI_PHYSICAL_ADDRESS SystemMemoryTop;\r
73 EFI_PHYSICAL_ADDRESS ResourceTop;\r
74 BOOLEAN Found;\r
3a6eaccf 75\r
76 // Ensure PcdSystemMemorySize has been set\r
77 ASSERT (PcdGet32 (PcdSystemMemorySize) != 0);\r
78\r
3a6eaccf 79 //\r
80 // Now, the permanent memory has been installed, we can call AllocatePages()\r
81 //\r
d269095b 82 ResourceAttributes = (\r
3a6eaccf 83 EFI_RESOURCE_ATTRIBUTE_PRESENT |\r
84 EFI_RESOURCE_ATTRIBUTE_INITIALIZED |\r
85 EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |\r
86 EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |\r
87 EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |\r
88 EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |\r
89 EFI_RESOURCE_ATTRIBUTE_TESTED\r
90 );\r
91\r
d269095b 92 // Reserved the memory space occupied by the firmware volume\r
3a6eaccf 93 BuildResourceDescriptorHob (\r
94 EFI_RESOURCE_SYSTEM_MEMORY,\r
d269095b 95 ResourceAttributes,\r
3a6eaccf 96 PcdGet32 (PcdSystemMemoryBase),\r
d269095b 97 PcdGet32 (PcdSystemMemorySize)\r
3a6eaccf 98 );\r
99\r
d269095b 100 SystemMemoryTop = PcdGet32 (PcdSystemMemoryBase) + PcdGet32 (PcdSystemMemorySize);\r
f92b93c9 101 FdTop = PcdGet32(PcdFdBaseAddress) + PcdGet32(PcdFdSize);\r
d269095b 102\r
103 // EDK2 does not have the concept of boot firmware copied into DRAM. To avoid the DXE\r
104 // core to overwrite this area we must mark the region with the attribute non-present\r
f92b93c9 105 if ((PcdGet32 (PcdFdBaseAddress) >= PcdGet32 (PcdSystemMemoryBase)) && (FdTop <= SystemMemoryTop)) {\r
d269095b 106 Found = FALSE;\r
107\r
108 // Search for System Memory Hob that contains the firmware\r
109 NextHob.Raw = GetHobList ();\r
110 while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {\r
111 if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&\r
f92b93c9 112 (PcdGet32(PcdFdBaseAddress) >= NextHob.ResourceDescriptor->PhysicalStart) &&\r
d269095b 113 (FdTop <= NextHob.ResourceDescriptor->PhysicalStart + NextHob.ResourceDescriptor->ResourceLength))\r
114 {\r
115 ResourceAttributes = NextHob.ResourceDescriptor->ResourceAttribute;\r
116 ResourceLength = NextHob.ResourceDescriptor->ResourceLength;\r
117 ResourceTop = NextHob.ResourceDescriptor->PhysicalStart + ResourceLength;\r
118\r
f92b93c9 119 if (PcdGet32(PcdFdBaseAddress) == NextHob.ResourceDescriptor->PhysicalStart) {\r
d269095b 120 if (SystemMemoryTop == FdTop) {\r
121 NextHob.ResourceDescriptor->ResourceAttribute = ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT;\r
122 } else {\r
123 // Create the System Memory HOB for the firmware with the non-present attribute\r
124 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,\r
125 ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT,\r
f92b93c9 126 PcdGet32(PcdFdBaseAddress),\r
127 PcdGet32(PcdFdSize));\r
d269095b 128\r
129 // Top of the FD is system memory available for UEFI\r
f92b93c9 130 NextHob.ResourceDescriptor->PhysicalStart += PcdGet32(PcdFdSize);\r
131 NextHob.ResourceDescriptor->ResourceLength -= PcdGet32(PcdFdSize);\r
d269095b 132 }\r
133 } else {\r
134 // Create the System Memory HOB for the firmware with the non-present attribute\r
135 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,\r
136 ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT,\r
f92b93c9 137 PcdGet32(PcdFdBaseAddress),\r
138 PcdGet32(PcdFdSize));\r
d269095b 139\r
140 // Update the HOB\r
f92b93c9 141 NextHob.ResourceDescriptor->ResourceLength = PcdGet32(PcdFdBaseAddress) - NextHob.ResourceDescriptor->PhysicalStart;\r
d269095b 142\r
143 // If there is some memory available on the top of the FD then create a HOB\r
144 if (FdTop < NextHob.ResourceDescriptor->PhysicalStart + ResourceLength) {\r
145 // Create the System Memory HOB for the remaining region (top of the FD)\r
146 BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,\r
147 ResourceAttributes,\r
148 FdTop,\r
149 ResourceTop - FdTop);\r
150 }\r
151 }\r
152 Found = TRUE;\r
153 break;\r
154 }\r
155 NextHob.Raw = GET_NEXT_HOB (NextHob);\r
3a6eaccf 156 }\r
d269095b 157\r
158 ASSERT(Found);\r
3a6eaccf 159 }\r
160\r
161 // Build Memory Allocation Hob\r
162 InitMmu ();\r
163\r
164 if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob)) {\r
165 // Optional feature that helps prevent EFI memory map fragmentation.\r
166 BuildMemoryTypeInformationHob ();\r
167 }\r
168\r
169 return EFI_SUCCESS;\r
170}\r