/**
Called to initialize the memory service.
@param SmramRangeCount Number of SMRAM Regions
@param SmramRanges Pointer to SMRAM Descriptors
**/
VOID
SmmInitializeMemoryServices (
IN UINTN SmramRangeCount,
IN EFI_SMRAM_DESCRIPTOR *SmramRanges
)
{
UINTN Index;
EFI_STATUS Status;
UINTN SmmPoolTypeIndex;
EFI_LOAD_FIXED_ADDRESS_CONFIGURATION_TABLE *LMFAConfigurationTable;
//
// Initialize Pool list
//
for (SmmPoolTypeIndex = 0; SmmPoolTypeIndex < SmmPoolTypeMax; SmmPoolTypeIndex++) {
for (Index = 0; Index < ARRAY_SIZE (mSmmPoolLists[SmmPoolTypeIndex]); Index++) {
InitializeListHead (&mSmmPoolLists[SmmPoolTypeIndex][Index]);
}
}
Status = EfiGetSystemConfigurationTable (
&gLoadFixedAddressConfigurationTableGuid,
(VOID **) &LMFAConfigurationTable
);
if (!EFI_ERROR (Status) && LMFAConfigurationTable != NULL) {
gLoadModuleAtFixAddressSmramBase = LMFAConfigurationTable->SmramBase;
}
//
// Add Free SMRAM regions
// Need add Free memory at first, to let gSmmMemoryMap record data
//
for (Index = 0; Index < SmramRangeCount; Index++) {
if ((SmramRanges[Index].RegionState & (EFI_ALLOCATED | EFI_NEEDS_TESTING | EFI_NEEDS_ECC_INITIALIZATION)) != 0) {
continue;
}
SmmAddMemoryRegion (
SmramRanges[Index].CpuStart,
SmramRanges[Index].PhysicalSize,
EfiConventionalMemory,
SmramRanges[Index].RegionState
);
}
//
// Add the allocated SMRAM regions
//
for (Index = 0; Index < SmramRangeCount; Index++) {
if ((SmramRanges[Index].RegionState & (EFI_ALLOCATED | EFI_NEEDS_TESTING | EFI_NEEDS_ECC_INITIALIZATION)) == 0) {
continue;
}
SmmAddMemoryRegion (
SmramRanges[Index].CpuStart,
SmramRanges[Index].PhysicalSize,
EfiConventionalMemory,
SmramRanges[Index].RegionState
);
}
}
/**
Called to initialize the memory service.
@param SmramRangeCount Number of SMRAM Regions
@param SmramRanges Pointer to SMRAM Descriptors
**/
VOID
SmmInitializeMemoryServices (
IN UINTN SmramRangeCount,
IN EFI_SMRAM_DESCRIPTOR *SmramRanges
)
{
UINTN Index;
UINT64 SmmCodeSize;
UINTN CurrentSmramRangesIndex;
UINT64 MaxSize;
//
// Initialize Pool list
//
for (Index = sizeof (mSmmPoolLists) / sizeof (*mSmmPoolLists); Index > 0;) {
InitializeListHead (&mSmmPoolLists[--Index]);
}
CurrentSmramRangesIndex = 0;
//
// If Loadding Module At fixed Address feature is enabled, cache the SMRAM base here
//
if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {
//
// Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber
//
SmmCodeSize = LShiftU64 (PcdGet32(PcdLoadFixAddressSmmCodePageNumber), EFI_PAGE_SHIFT);
//
// Find the largest SMRAM range between 1MB and 4GB that is at least 256KB - 4K in size
//
for (Index = 0, MaxSize = SIZE_256KB - EFI_PAGE_SIZE; Index < SmramRangeCount; Index++) {
//
// Skip any SMRAM region that is already allocated, needs testing, or needs ECC initialization
//
if ((SmramRanges[Index].RegionState & (EFI_ALLOCATED | EFI_NEEDS_TESTING | EFI_NEEDS_ECC_INITIALIZATION)) != 0) {
continue;
}
if (SmramRanges[Index].CpuStart >= BASE_1MB) {
if ((SmramRanges[Index].CpuStart + SmramRanges[Index].PhysicalSize) <= BASE_4GB) {
if (SmramRanges[Index].PhysicalSize >= MaxSize) {
MaxSize = SmramRanges[Index].PhysicalSize;
CurrentSmramRangesIndex = Index;
}
}
}
}
gLoadModuleAtFixAddressSmramBase = SmramRanges[CurrentSmramRangesIndex].CpuStart;
//
// cut out a memory range from this SMRAM range with the size SmmCodeSize to hold SMM driver code
// A notable thing is that SMM core is already loaded into this range.
//
SmramRanges[CurrentSmramRangesIndex].CpuStart = SmramRanges[CurrentSmramRangesIndex].CpuStart + SmmCodeSize;
SmramRanges[CurrentSmramRangesIndex].PhysicalSize = SmramRanges[CurrentSmramRangesIndex].PhysicalSize - SmmCodeSize;
}
//
// Initialize free SMRAM regions
//
for (Index = 0; Index < SmramRangeCount; Index++) {
SmmAddMemoryRegion (
SmramRanges[Index].CpuStart,
SmramRanges[Index].PhysicalSize,
EfiConventionalMemory,
SmramRanges[Index].RegionState
);
}
}