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/**@file
Copyright (c) 2006, Intel 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:
WinNtAutoscan.c
Abstract:
This PEIM to abstract memory auto-scan in a Windows NT environment.
Revision History
**/
//
// The package level header files this module uses
//
#include <PiPei.h>
#include <WinNtPeim.h>
//
// The protocols, PPI and GUID defintions for this module
//
#include <Ppi/NtAutoscan.h>
#include <Ppi/ReadOnlyVariable2.h>
#include <Guid/MemoryTypeInformation.h>
//
// The Library classes this module consumes
//
#include <Library/DebugLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/HobLib.h>
#include <Library/PeiServicesLib.h>
EFI_MEMORY_TYPE_INFORMATION mDefaultMemoryTypeInformation[] = {
{ EfiReservedMemoryType, 0x0004 },
{ EfiRuntimeServicesCode, 0x0040 },
{ EfiRuntimeServicesData, 0x0040 },
{ EfiBootServicesCode, 0x0300 },
{ EfiBootServicesData, 0x1000 },
{ EfiMaxMemoryType, 0 }
};
/**
Validate variable data for the MemoryTypeInformation.
@param MemoryData Variable data.
@param MemoryDataSize Variable data length.
@return TRUE The variable data is valid.
@return FALSE The variable data is invalid.
**/
BOOLEAN
ValidateMemoryTypeInfoVariable (
IN EFI_MEMORY_TYPE_INFORMATION *MemoryData,
IN UINTN MemoryDataSize
)
{
UINTN Count;
UINTN Index;
// Check the input parameter.
if (MemoryData == NULL) {
return FALSE;
}
// Get Count
Count = MemoryDataSize / sizeof (*MemoryData);
// Check Size
if (Count * sizeof(*MemoryData) != MemoryDataSize) {
return FALSE;
}
// Check last entry type filed.
if (MemoryData[Count - 1].Type != EfiMaxMemoryType) {
return FALSE;
}
// Check the type filed.
for (Index = 0; Index < Count - 1; Index++) {
if (MemoryData[Index].Type >= EfiMaxMemoryType) {
return FALSE;
}
}
return TRUE;
}
EFI_STATUS
EFIAPI
PeimInitializeWinNtAutoScan (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
/*++
Routine Description:
Perform a call-back into the SEC simulator to get a memory value
Arguments:
FfsHeader - General purpose data available to every PEIM
PeiServices - General purpose services available to every PEIM.
Returns:
None
--*/
{
EFI_STATUS Status;
EFI_PEI_PPI_DESCRIPTOR *PpiDescriptor;
PEI_NT_AUTOSCAN_PPI *PeiNtService;
UINT64 MemorySize;
EFI_PHYSICAL_ADDRESS MemoryBase;
UINTN Index;
EFI_RESOURCE_ATTRIBUTE_TYPE Attributes;
EFI_PEI_READ_ONLY_VARIABLE2_PPI *Variable;
UINTN DataSize;
EFI_MEMORY_TYPE_INFORMATION MemoryData [EfiMaxMemoryType + 1];
DEBUG ((EFI_D_ERROR, "NT 32 Autoscan PEIM Loaded\n"));
//
// Get the PEI NT Autoscan PPI
//
Status = PeiServicesLocatePpi (
&gPeiNtAutoScanPpiGuid, // GUID
0, // INSTANCE
&PpiDescriptor, // EFI_PEI_PPI_DESCRIPTOR
(VOID**)&PeiNtService // PPI
);
ASSERT_EFI_ERROR (Status);
Index = 0;
do {
Status = PeiNtService->NtAutoScan (Index, &MemoryBase, &MemorySize);
if (!EFI_ERROR (Status)) {
Attributes =
(
EFI_RESOURCE_ATTRIBUTE_PRESENT |
EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE
);
if (Index == 0) {
//
// Register the memory with the PEI Core
//
Status = PeiServicesInstallPeiMemory (MemoryBase, MemorySize);
ASSERT_EFI_ERROR (Status);
Attributes |= EFI_RESOURCE_ATTRIBUTE_TESTED;
}
BuildResourceDescriptorHob (
EFI_RESOURCE_SYSTEM_MEMORY,
Attributes,
MemoryBase,
MemorySize
);
}
Index++;
} while (!EFI_ERROR (Status));
//
// Build the CPU hob with 36-bit addressing and 16-bits of IO space.
//
BuildCpuHob (36, 16);
//
// Build GUIDed Hob that contains the Memory Type Information array
//
Status = PeiServicesLocatePpi (
&gEfiPeiReadOnlyVariable2PpiGuid,
0,
NULL,
(VOID **)&Variable
);
ASSERT_EFI_ERROR (Status);
DataSize = sizeof (MemoryData);
Status = Variable->GetVariable (
Variable,
EFI_MEMORY_TYPE_INFORMATION_VARIABLE_NAME,
&gEfiMemoryTypeInformationGuid,
NULL,
&DataSize,
&MemoryData
);
if (EFI_ERROR (Status) || !ValidateMemoryTypeInfoVariable(MemoryData, DataSize)) {
//
// Create Memory Type Information HOB
//
BuildGuidDataHob (
&gEfiMemoryTypeInformationGuid,
mDefaultMemoryTypeInformation,
sizeof(mDefaultMemoryTypeInformation)
);
} else {
//
// Create Memory Type Information HOB
//
BuildGuidDataHob (
&gEfiMemoryTypeInformationGuid,
MemoryData,
DataSize
);
}
return Status;
}
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