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/** @file
Implementation of Generic Memory Test Protocol which does not perform real memory test.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "NullMemoryTest.h"
UINT64 mTestedSystemMemory = 0;
UINT64 mTotalSystemMemory = 0;
EFI_HANDLE mGenericMemoryTestHandle;
EFI_GENERIC_MEMORY_TEST_PROTOCOL mGenericMemoryTest = {
InitializeMemoryTest,
GenPerformMemoryTest,
GenMemoryTestFinished,
GenCompatibleRangeTest
};
/**
Entry point of the NULL memory test driver.
This function is the entry point of the NULL memory test driver.
It simply installs the Generic Memory Test Protocol.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS Generic Memory Test Protocol is successfully installed.
**/
EFI_STATUS
EFIAPI
GenericMemoryTestEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
Status = gBS->InstallProtocolInterface (
&mGenericMemoryTestHandle,
&gEfiGenericMemTestProtocolGuid,
EFI_NATIVE_INTERFACE,
&mGenericMemoryTest
);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
/**
Convert the memory range to tested.
@param BaseAddress Base address of the memory range.
@param Length Length of the memory range.
@param Capabilities Capabilities of the memory range.
@retval EFI_SUCCESS The memory range is converted to tested.
@retval others Error happens.
**/
EFI_STATUS
ConvertToTestedMemory (
IN UINT64 BaseAddress,
IN UINT64 Length,
IN UINT64 Capabilities
)
{
EFI_STATUS Status;
Status = gDS->RemoveMemorySpace (
BaseAddress,
Length
);
if (!EFI_ERROR (Status)) {
Status = gDS->AddMemorySpace (
((Capabilities & EFI_MEMORY_MORE_RELIABLE) == EFI_MEMORY_MORE_RELIABLE) ?
EfiGcdMemoryTypeMoreReliable : EfiGcdMemoryTypeSystemMemory,
BaseAddress,
Length,
Capabilities &~
(EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED | EFI_MEMORY_TESTED | EFI_MEMORY_RUNTIME)
);
}
return Status;
}
/**
Initialize the generic memory test.
This function implements EFI_GENERIC_MEMORY_TEST_PROTOCOL.MemoryTestInit.
It simply promotes untested reserved memory to system memory without real test.
@param This Protocol instance pointer.
@param Level The coverage level of the memory test.
@param RequireSoftECCInit Indicate if the memory need software ECC init.
@retval EFI_SUCCESS The generic memory test initialized correctly.
@retval EFI_NO_MEDIA There is not any non-tested memory found, in this
function if not any non-tesed memory found means
that the memory test driver have not detect any
non-tested extended memory of current system.
**/
EFI_STATUS
EFIAPI
InitializeMemoryTest (
IN EFI_GENERIC_MEMORY_TEST_PROTOCOL *This,
IN EXTENDMEM_COVERAGE_LEVEL Level,
OUT BOOLEAN *RequireSoftECCInit
)
{
EFI_STATUS Status;
UINTN NumberOfDescriptors;
EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap;
UINTN Index;
gDS->GetMemorySpaceMap (&NumberOfDescriptors, &MemorySpaceMap);
for (Index = 0; Index < NumberOfDescriptors; Index++) {
if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeReserved &&
(MemorySpaceMap[Index].Capabilities & (EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED | EFI_MEMORY_TESTED)) ==
(EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED)
) {
//
// For those reserved memory that have not been tested, simply promote to system memory.
//
Status = ConvertToTestedMemory (
MemorySpaceMap[Index].BaseAddress,
MemorySpaceMap[Index].Length,
MemorySpaceMap[Index].Capabilities
);
ASSERT_EFI_ERROR (Status);
mTestedSystemMemory += MemorySpaceMap[Index].Length;
mTotalSystemMemory += MemorySpaceMap[Index].Length;
} else if ((MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeSystemMemory) ||
(MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeMoreReliable)) {
mTotalSystemMemory += MemorySpaceMap[Index].Length;
}
}
FreePool (MemorySpaceMap);
*RequireSoftECCInit = FALSE;
return EFI_SUCCESS;
}
/**
Perform the memory test.
This function implements EFI_GENERIC_MEMORY_TEST_PROTOCOL.PerformMemoryTest.
It simply returns EFI_NOT_FOUND.
@param This Protocol instance pointer.
@param TestedMemorySize Return the tested extended memory size.
@param TotalMemorySize Return the whole system physical memory size, this
value may be changed if in some case some error
DIMMs be disabled.
@param ErrorOut Any time the memory error occurs, this will be
TRUE.
@param IfTestAbort Indicate if the user press "ESC" to skip the memory
test.
@retval EFI_SUCCESS One block of memory test ok, the block size is hide
internally.
@retval EFI_NOT_FOUND Indicate all the non-tested memory blocks have
already go through.
@retval EFI_DEVICE_ERROR Mis-compare error, and no agent can handle it
**/
EFI_STATUS
EFIAPI
GenPerformMemoryTest (
IN EFI_GENERIC_MEMORY_TEST_PROTOCOL *This,
IN OUT UINT64 *TestedMemorySize,
OUT UINT64 *TotalMemorySize,
OUT BOOLEAN *ErrorOut,
IN BOOLEAN TestAbort
)
{
*ErrorOut = FALSE;
*TestedMemorySize = mTestedSystemMemory;
*TotalMemorySize = mTotalSystemMemory;
return EFI_NOT_FOUND;
}
/**
The memory test finished.
This function implements EFI_GENERIC_MEMORY_TEST_PROTOCOL.Finished.
It simply returns EFI_SUCCESS.
@param This Protocol instance pointer.
@retval EFI_SUCCESS Successful free all the generic memory test driver
allocated resource and notify to platform memory
test driver that memory test finished.
**/
EFI_STATUS
EFIAPI
GenMemoryTestFinished (
IN EFI_GENERIC_MEMORY_TEST_PROTOCOL *This
)
{
return EFI_SUCCESS;
}
/**
Provide capability to test compatible range which used by some special
driver required using memory range before BDS perform memory test.
This function implements EFI_GENERIC_MEMORY_TEST_PROTOCOL.CompatibleRangeTest.
It simply sets the memory range to system memory.
@param This Protocol instance pointer.
@param StartAddress The start address of the memory range.
@param Length The memory range's length.
@retval EFI_SUCCESS The compatible memory range pass the memory test.
@retval EFI_INVALID_PARAMETER The compatible memory range must be below 16M.
**/
EFI_STATUS
EFIAPI
GenCompatibleRangeTest (
IN EFI_GENERIC_MEMORY_TEST_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS StartAddress,
IN UINT64 Length
)
{
EFI_STATUS Status;
EFI_GCD_MEMORY_SPACE_DESCRIPTOR Descriptor;
EFI_PHYSICAL_ADDRESS CurrentBase;
UINT64 CurrentLength;
//
// Check if the parameter is below 16MB
//
if (StartAddress + Length > SIZE_16MB) {
return EFI_INVALID_PARAMETER;
}
CurrentBase = StartAddress;
do {
//
// Check the required memory range status; if the required memory range span
// the different GCD memory descriptor, it may be cause different action.
//
Status = gDS->GetMemorySpaceDescriptor (
CurrentBase,
&Descriptor
);
if (EFI_ERROR (Status)) {
return Status;
}
if (Descriptor.GcdMemoryType == EfiGcdMemoryTypeReserved &&
(Descriptor.Capabilities & (EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED | EFI_MEMORY_TESTED)) ==
(EFI_MEMORY_PRESENT | EFI_MEMORY_INITIALIZED)
) {
CurrentLength = Descriptor.BaseAddress + Descriptor.Length - CurrentBase;
if (CurrentBase + CurrentLength > StartAddress + Length) {
CurrentLength = StartAddress + Length - CurrentBase;
}
Status = ConvertToTestedMemory (
CurrentBase,
CurrentLength,
Descriptor.Capabilities
);
if (EFI_ERROR (Status)) {
return Status;
}
}
CurrentBase = Descriptor.BaseAddress + Descriptor.Length;
} while (CurrentBase < StartAddress + Length);
//
// Here means the required range already be tested, so just return success.
//
return EFI_SUCCESS;
}
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