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/**@file
Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2011 Hewlett Packard Corporation. All rights reserved.<BR>
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.
Module Name:
MemoryInit.c
Abstract:
PEIM to provide fake memory init
**/
//
// The package level header files this module uses
//
#include <PiPei.h>
//
// The protocols, PPI and GUID defintions for this module
//
//
// The Library classes this module consumes
//
#include <Library/DebugLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/PcdLib.h>
#include <Library/HobLib.h>
#include <Library/ArmLib.h>
//
// Module globals
//
#define DDR_ATTRIBUTES_CACHED ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
#define DDR_ATTRIBUTES_UNCACHED ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
EFI_STATUS
FindMainMemory(
OUT UINT32 *PhysicalBase,
OUT UINT32 *Length
)
{
EFI_PEI_HOB_POINTERS NextHob;
// look at the resource descriptor hobs, choose the first system memory one
NextHob.Raw = GetHobList ();
while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {
if(NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY)
{
*PhysicalBase = (UINT32)NextHob.ResourceDescriptor->PhysicalStart;
*Length = (UINT32)NextHob.ResourceDescriptor->ResourceLength;
return EFI_SUCCESS;
}
NextHob.Raw = GET_NEXT_HOB (NextHob);
}
return EFI_NOT_FOUND;
}
VOID
ConfigureMmu ( VOID )
{
EFI_STATUS Status;
UINTN Idx;
UINT32 CacheAttributes;
UINT32 SystemMemoryBase;
UINT32 SystemMemoryLength;
UINT32 SystemMemoryLastAddress;
ARM_MEMORY_REGION_DESCRIPTOR MemoryTable[4];
VOID *TranslationTableBase;
UINTN TranslationTableSize;
if (FeaturePcdGet(PcdCacheEnable) == TRUE) {
CacheAttributes = DDR_ATTRIBUTES_CACHED;
} else {
CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
}
Idx = 0;
// Main Memory
Status = FindMainMemory (&SystemMemoryBase, &SystemMemoryLength);
ASSERT_EFI_ERROR (Status);
SystemMemoryLastAddress = SystemMemoryBase + (SystemMemoryLength-1);
// if system memory does not begin at 0
if(SystemMemoryBase > 0) {
MemoryTable[Idx].PhysicalBase = 0;
MemoryTable[Idx].VirtualBase = 0;
MemoryTable[Idx].Length = SystemMemoryBase;
MemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
Idx++;
}
MemoryTable[Idx].PhysicalBase = SystemMemoryBase;
MemoryTable[Idx].VirtualBase = SystemMemoryBase;
MemoryTable[Idx].Length = SystemMemoryLength;
MemoryTable[Idx].Attributes = (ARM_MEMORY_REGION_ATTRIBUTES)CacheAttributes;
Idx++;
// if system memory does not go to the last address (0xFFFFFFFF)
if( SystemMemoryLastAddress < MAX_ADDRESS ) {
MemoryTable[Idx].PhysicalBase = SystemMemoryLastAddress + 1;
MemoryTable[Idx].VirtualBase = MemoryTable[Idx].PhysicalBase;
MemoryTable[Idx].Length = MAX_ADDRESS - MemoryTable[Idx].PhysicalBase + 1;
MemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
Idx++;
}
// End of Table
MemoryTable[Idx].PhysicalBase = 0;
MemoryTable[Idx].VirtualBase = 0;
MemoryTable[Idx].Length = 0;
MemoryTable[Idx].Attributes = (ARM_MEMORY_REGION_ATTRIBUTES)0;
DEBUG ((EFI_D_INFO, "Enabling MMU, setting 0x%08x + %d MB to %a\n",
SystemMemoryBase, SystemMemoryLength/1024/1024,
(CacheAttributes == DDR_ATTRIBUTES_CACHED) ? "cacheable" : "uncacheable"));
ArmConfigureMmu (MemoryTable, &TranslationTableBase, &TranslationTableSize);
BuildMemoryAllocationHob((EFI_PHYSICAL_ADDRESS)(UINTN)TranslationTableBase, TranslationTableSize, EfiBootServicesData);
}
EFI_STATUS
EFIAPI
InitializeCpuPeim (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
/*++
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
--*/
{
// Enable program flow prediction, if supported.
ArmEnableBranchPrediction ();
// publish the CPU memory and io spaces sizes
BuildCpuHob (PcdGet8 (PcdPrePiCpuMemorySize), PcdGet8 (PcdPrePiCpuIoSize));
ConfigureMmu();
return EFI_SUCCESS;
}
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