--- /dev/null
+/** @file\r
+*\r
+* Copyright (c) 2011-2015, ARM Limited. All rights reserved.\r
+*\r
+* This program and the accompanying materials\r
+* are licensed and made available under the terms and conditions of the BSD License\r
+* which accompanies this distribution. The full text of the license may be found at\r
+* http://opensource.org/licenses/bsd-license.php\r
+*\r
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+*\r
+**/\r
+\r
+#include <PiPei.h>\r
+\r
+#include <Library/ArmMmuLib.h>\r
+#include <Library/ArmPlatformLib.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/HobLib.h>\r
+#include <Library/MemoryAllocationLib.h>\r
+#include <Library/PcdLib.h>\r
+\r
+VOID\r
+BuildMemoryTypeInformationHob (\r
+ VOID\r
+ );\r
+\r
+STATIC\r
+VOID\r
+InitMmu (\r
+ IN ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable\r
+ )\r
+{\r
+\r
+ VOID *TranslationTableBase;\r
+ UINTN TranslationTableSize;\r
+ RETURN_STATUS Status;\r
+\r
+ //Note: Because we called PeiServicesInstallPeiMemory() before to call InitMmu() the MMU Page Table resides in\r
+ // DRAM (even at the top of DRAM as it is the first permanent memory allocation)\r
+ Status = ArmConfigureMmu (MemoryTable, &TranslationTableBase, &TranslationTableSize);\r
+ if (EFI_ERROR (Status)) {\r
+ DEBUG ((EFI_D_ERROR, "Error: Failed to enable MMU\n"));\r
+ }\r
+}\r
+\r
+/*++\r
+\r
+Routine Description:\r
+\r
+\r
+\r
+Arguments:\r
+\r
+ FileHandle - Handle of the file being invoked.\r
+ PeiServices - Describes the list of possible PEI Services.\r
+\r
+Returns:\r
+\r
+ Status - EFI_SUCCESS if the boot mode could be set\r
+\r
+--*/\r
+EFI_STATUS\r
+EFIAPI\r
+MemoryPeim (\r
+ IN EFI_PHYSICAL_ADDRESS UefiMemoryBase,\r
+ IN UINT64 UefiMemorySize\r
+ )\r
+{\r
+ ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable;\r
+ EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes;\r
+ UINT64 ResourceLength;\r
+ EFI_PEI_HOB_POINTERS NextHob;\r
+ EFI_PHYSICAL_ADDRESS FdTop;\r
+ EFI_PHYSICAL_ADDRESS SystemMemoryTop;\r
+ EFI_PHYSICAL_ADDRESS ResourceTop;\r
+ BOOLEAN Found;\r
+\r
+ // Get Virtual Memory Map from the Platform Library\r
+ ArmPlatformGetVirtualMemoryMap (&MemoryTable);\r
+\r
+ // Ensure PcdSystemMemorySize has been set\r
+ ASSERT (PcdGet64 (PcdSystemMemorySize) != 0);\r
+\r
+ //\r
+ // Now, the permanent memory has been installed, we can call AllocatePages()\r
+ //\r
+ ResourceAttributes = (\r
+ EFI_RESOURCE_ATTRIBUTE_PRESENT |\r
+ EFI_RESOURCE_ATTRIBUTE_INITIALIZED |\r
+ EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |\r
+ EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |\r
+ EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |\r
+ EFI_RESOURCE_ATTRIBUTE_TESTED\r
+ );\r
+\r
+ //\r
+ // Check if the resource for the main system memory has been declared\r
+ //\r
+ Found = FALSE;\r
+ NextHob.Raw = GetHobList ();\r
+ while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {\r
+ if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&\r
+ (PcdGet64 (PcdSystemMemoryBase) >= NextHob.ResourceDescriptor->PhysicalStart) &&\r
+ (NextHob.ResourceDescriptor->PhysicalStart + NextHob.ResourceDescriptor->ResourceLength <= PcdGet64 (PcdSystemMemoryBase) + PcdGet64 (PcdSystemMemorySize)))\r
+ {\r
+ Found = TRUE;\r
+ break;\r
+ }\r
+ NextHob.Raw = GET_NEXT_HOB (NextHob);\r
+ }\r
+\r
+ if (!Found) {\r
+ // Reserved the memory space occupied by the firmware volume\r
+ BuildResourceDescriptorHob (\r
+ EFI_RESOURCE_SYSTEM_MEMORY,\r
+ ResourceAttributes,\r
+ PcdGet64 (PcdSystemMemoryBase),\r
+ PcdGet64 (PcdSystemMemorySize)\r
+ );\r
+ }\r
+\r
+ //\r
+ // Reserved the memory space occupied by the firmware volume\r
+ //\r
+\r
+ SystemMemoryTop = (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdSystemMemoryBase) + (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdSystemMemorySize);\r
+ FdTop = (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdFdBaseAddress) + (EFI_PHYSICAL_ADDRESS)PcdGet32 (PcdFdSize);\r
+\r
+ // EDK2 does not have the concept of boot firmware copied into DRAM. To avoid the DXE\r
+ // core to overwrite this area we must mark the region with the attribute non-present\r
+ if ((PcdGet64 (PcdFdBaseAddress) >= PcdGet64 (PcdSystemMemoryBase)) && (FdTop <= SystemMemoryTop)) {\r
+ Found = FALSE;\r
+\r
+ // Search for System Memory Hob that contains the firmware\r
+ NextHob.Raw = GetHobList ();\r
+ while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {\r
+ if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&\r
+ (PcdGet64 (PcdFdBaseAddress) >= NextHob.ResourceDescriptor->PhysicalStart) &&\r
+ (FdTop <= NextHob.ResourceDescriptor->PhysicalStart + NextHob.ResourceDescriptor->ResourceLength))\r
+ {\r
+ ResourceAttributes = NextHob.ResourceDescriptor->ResourceAttribute;\r
+ ResourceLength = NextHob.ResourceDescriptor->ResourceLength;\r
+ ResourceTop = NextHob.ResourceDescriptor->PhysicalStart + ResourceLength;\r
+\r
+ if (PcdGet64 (PcdFdBaseAddress) == NextHob.ResourceDescriptor->PhysicalStart) {\r
+ if (SystemMemoryTop == FdTop) {\r
+ NextHob.ResourceDescriptor->ResourceAttribute = ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT;\r
+ } else {\r
+ // Create the System Memory HOB for the firmware with the non-present attribute\r
+ BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,\r
+ ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT,\r
+ PcdGet64 (PcdFdBaseAddress),\r
+ PcdGet32 (PcdFdSize));\r
+\r
+ // Top of the FD is system memory available for UEFI\r
+ NextHob.ResourceDescriptor->PhysicalStart += PcdGet32(PcdFdSize);\r
+ NextHob.ResourceDescriptor->ResourceLength -= PcdGet32(PcdFdSize);\r
+ }\r
+ } else {\r
+ // Create the System Memory HOB for the firmware with the non-present attribute\r
+ BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,\r
+ ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT,\r
+ PcdGet64 (PcdFdBaseAddress),\r
+ PcdGet32 (PcdFdSize));\r
+\r
+ // Update the HOB\r
+ NextHob.ResourceDescriptor->ResourceLength = PcdGet64 (PcdFdBaseAddress) - NextHob.ResourceDescriptor->PhysicalStart;\r
+\r
+ // If there is some memory available on the top of the FD then create a HOB\r
+ if (FdTop < NextHob.ResourceDescriptor->PhysicalStart + ResourceLength) {\r
+ // Create the System Memory HOB for the remaining region (top of the FD)\r
+ BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,\r
+ ResourceAttributes,\r
+ FdTop,\r
+ ResourceTop - FdTop);\r
+ }\r
+ }\r
+ Found = TRUE;\r
+ break;\r
+ }\r
+ NextHob.Raw = GET_NEXT_HOB (NextHob);\r
+ }\r
+\r
+ ASSERT(Found);\r
+ }\r
+\r
+ // Build Memory Allocation Hob\r
+ InitMmu (MemoryTable);\r
+\r
+ if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob)) {\r
+ // Optional feature that helps prevent EFI memory map fragmentation.\r
+ BuildMemoryTypeInformationHob ();\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
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