diff options
Diffstat (limited to 'BeagleBoardPkg/Library/MemoryInitPeiLib/MemoryInitPeiLib.c')
| -rw-r--r-- | BeagleBoardPkg/Library/MemoryInitPeiLib/MemoryInitPeiLib.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/BeagleBoardPkg/Library/MemoryInitPeiLib/MemoryInitPeiLib.c b/BeagleBoardPkg/Library/MemoryInitPeiLib/MemoryInitPeiLib.c new file mode 100644 index 0000000000..2feb11f21d --- /dev/null +++ b/BeagleBoardPkg/Library/MemoryInitPeiLib/MemoryInitPeiLib.c @@ -0,0 +1,198 @@ +/** @file
+*
+* Copyright (c) 2011-2015, ARM Limited. All rights reserved.
+*
+* This program and the accompanying materials
+* are licensed and made available under the terms and conditions of the BSD License
+* which accompanies this distribution. The full text of the license may be found at
+* http://opensource.org/licenses/bsd-license.php
+*
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+*
+**/
+
+#include <PiPei.h>
+
+#include <Library/ArmMmuLib.h>
+#include <Library/ArmPlatformLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+
+VOID
+BuildMemoryTypeInformationHob (
+ VOID
+ );
+
+STATIC
+VOID
+InitMmu (
+ IN ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable
+ )
+{
+
+ VOID *TranslationTableBase;
+ UINTN TranslationTableSize;
+ RETURN_STATUS Status;
+
+ //Note: Because we called PeiServicesInstallPeiMemory() before to call InitMmu() the MMU Page Table resides in
+ // DRAM (even at the top of DRAM as it is the first permanent memory allocation)
+ Status = ArmConfigureMmu (MemoryTable, &TranslationTableBase, &TranslationTableSize);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "Error: Failed to enable MMU\n"));
+ }
+}
+
+/*++
+
+Routine Description:
+
+
+
+Arguments:
+
+ FileHandle - Handle of the file being invoked.
+ PeiServices - Describes the list of possible PEI Services.
+
+Returns:
+
+ Status - EFI_SUCCESS if the boot mode could be set
+
+--*/
+EFI_STATUS
+EFIAPI
+MemoryPeim (
+ IN EFI_PHYSICAL_ADDRESS UefiMemoryBase,
+ IN UINT64 UefiMemorySize
+ )
+{
+ ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable;
+ EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes;
+ UINT64 ResourceLength;
+ EFI_PEI_HOB_POINTERS NextHob;
+ EFI_PHYSICAL_ADDRESS FdTop;
+ EFI_PHYSICAL_ADDRESS SystemMemoryTop;
+ EFI_PHYSICAL_ADDRESS ResourceTop;
+ BOOLEAN Found;
+
+ // Get Virtual Memory Map from the Platform Library
+ ArmPlatformGetVirtualMemoryMap (&MemoryTable);
+
+ // Ensure PcdSystemMemorySize has been set
+ ASSERT (PcdGet64 (PcdSystemMemorySize) != 0);
+
+ //
+ // Now, the permanent memory has been installed, we can call AllocatePages()
+ //
+ ResourceAttributes = (
+ EFI_RESOURCE_ATTRIBUTE_PRESENT |
+ EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_TESTED
+ );
+
+ //
+ // Check if the resource for the main system memory has been declared
+ //
+ Found = FALSE;
+ NextHob.Raw = GetHobList ();
+ while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {
+ if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
+ (PcdGet64 (PcdSystemMemoryBase) >= NextHob.ResourceDescriptor->PhysicalStart) &&
+ (NextHob.ResourceDescriptor->PhysicalStart + NextHob.ResourceDescriptor->ResourceLength <= PcdGet64 (PcdSystemMemoryBase) + PcdGet64 (PcdSystemMemorySize)))
+ {
+ Found = TRUE;
+ break;
+ }
+ NextHob.Raw = GET_NEXT_HOB (NextHob);
+ }
+
+ if (!Found) {
+ // Reserved the memory space occupied by the firmware volume
+ BuildResourceDescriptorHob (
+ EFI_RESOURCE_SYSTEM_MEMORY,
+ ResourceAttributes,
+ PcdGet64 (PcdSystemMemoryBase),
+ PcdGet64 (PcdSystemMemorySize)
+ );
+ }
+
+ //
+ // Reserved the memory space occupied by the firmware volume
+ //
+
+ SystemMemoryTop = (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdSystemMemoryBase) + (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdSystemMemorySize);
+ FdTop = (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdFdBaseAddress) + (EFI_PHYSICAL_ADDRESS)PcdGet32 (PcdFdSize);
+
+ // EDK2 does not have the concept of boot firmware copied into DRAM. To avoid the DXE
+ // core to overwrite this area we must mark the region with the attribute non-present
+ if ((PcdGet64 (PcdFdBaseAddress) >= PcdGet64 (PcdSystemMemoryBase)) && (FdTop <= SystemMemoryTop)) {
+ Found = FALSE;
+
+ // Search for System Memory Hob that contains the firmware
+ NextHob.Raw = GetHobList ();
+ while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {
+ if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
+ (PcdGet64 (PcdFdBaseAddress) >= NextHob.ResourceDescriptor->PhysicalStart) &&
+ (FdTop <= NextHob.ResourceDescriptor->PhysicalStart + NextHob.ResourceDescriptor->ResourceLength))
+ {
+ ResourceAttributes = NextHob.ResourceDescriptor->ResourceAttribute;
+ ResourceLength = NextHob.ResourceDescriptor->ResourceLength;
+ ResourceTop = NextHob.ResourceDescriptor->PhysicalStart + ResourceLength;
+
+ if (PcdGet64 (PcdFdBaseAddress) == NextHob.ResourceDescriptor->PhysicalStart) {
+ if (SystemMemoryTop == FdTop) {
+ NextHob.ResourceDescriptor->ResourceAttribute = ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT;
+ } else {
+ // Create the System Memory HOB for the firmware with the non-present attribute
+ BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,
+ ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT,
+ PcdGet64 (PcdFdBaseAddress),
+ PcdGet32 (PcdFdSize));
+
+ // Top of the FD is system memory available for UEFI
+ NextHob.ResourceDescriptor->PhysicalStart += PcdGet32(PcdFdSize);
+ NextHob.ResourceDescriptor->ResourceLength -= PcdGet32(PcdFdSize);
+ }
+ } else {
+ // Create the System Memory HOB for the firmware with the non-present attribute
+ BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,
+ ResourceAttributes & ~EFI_RESOURCE_ATTRIBUTE_PRESENT,
+ PcdGet64 (PcdFdBaseAddress),
+ PcdGet32 (PcdFdSize));
+
+ // Update the HOB
+ NextHob.ResourceDescriptor->ResourceLength = PcdGet64 (PcdFdBaseAddress) - NextHob.ResourceDescriptor->PhysicalStart;
+
+ // If there is some memory available on the top of the FD then create a HOB
+ if (FdTop < NextHob.ResourceDescriptor->PhysicalStart + ResourceLength) {
+ // Create the System Memory HOB for the remaining region (top of the FD)
+ BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,
+ ResourceAttributes,
+ FdTop,
+ ResourceTop - FdTop);
+ }
+ }
+ Found = TRUE;
+ break;
+ }
+ NextHob.Raw = GET_NEXT_HOB (NextHob);
+ }
+
+ ASSERT(Found);
+ }
+
+ // Build Memory Allocation Hob
+ InitMmu (MemoryTable);
+
+ if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob)) {
+ // Optional feature that helps prevent EFI memory map fragmentation.
+ BuildMemoryTypeInformationHob ();
+ }
+
+ return EFI_SUCCESS;
+}
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