VOID
AddMemoryRangeHob (
EFI_PHYSICAL_ADDRESS MemoryBase,
EFI_PHYSICAL_ADDRESS MemoryLimit
)
{
AddMemoryBaseSizeHob (MemoryBase, (UINT64)(MemoryLimit - MemoryBase));
}
/**
Peform Memory Detection
@return EFI_SUCCESS The PEIM initialized successfully.
**/
EFI_PHYSICAL_ADDRESS
MemDetect (
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS MemoryBase;
UINT64 MemorySize;
UINT64 LowerMemorySize;
UINT64 UpperMemorySize;
DEBUG ((EFI_D_ERROR, "MemDetect called\n"));
//
// Determine total memory size available
//
LowerMemorySize = GetSystemMemorySizeBelow4gb ();
UpperMemorySize = GetSystemMemorySizeAbove4gb ();
//
// Determine the range of memory to use during PEI
//
MemoryBase = PcdGet32 (PcdOvmfMemFvBase) + PcdGet32 (PcdOvmfMemFvSize);
MemorySize = LowerMemorySize - MemoryBase;
if (MemorySize > SIZE_64MB) {
MemoryBase = LowerMemorySize - SIZE_64MB;
MemorySize = SIZE_64MB;
}
//
// Publish this memory to the PEI Core
//
Status = PublishSystemMemory(MemoryBase, MemorySize);
ASSERT_EFI_ERROR (Status);
//
// Create memory HOBs
//
AddMemoryBaseSizeHob (MemoryBase, MemorySize);
AddMemoryRangeHob (BASE_1MB, MemoryBase);
AddMemoryRangeHob (0, BASE_512KB + BASE_128KB);
MtrrSetMemoryAttribute (BASE_1MB, MemoryBase + MemorySize - BASE_1MB, CacheWriteBack);
MtrrSetMemoryAttribute (0, BASE_512KB + BASE_128KB, CacheWriteBack);
if (UpperMemorySize != 0) {
AddUntestedMemoryBaseSizeHob (BASE_4GB, UpperMemorySize);
MtrrSetMemoryAttribute (BASE_4GB, UpperMemorySize, CacheWriteBack);
}
return MemoryBase + MemorySize;
}
VOID
XenMemMapInitialization (
VOID
)
{
EFI_E820_ENTRY64 *E820Map;
UINT32 E820EntriesCount;
EFI_STATUS Status;
DEBUG ((EFI_D_INFO, "Using memory map provided by Xen\n"));
//
// Create Memory Type Information HOB
//
BuildGuidDataHob (
&gEfiMemoryTypeInformationGuid,
mDefaultMemoryTypeInformation,
sizeof(mDefaultMemoryTypeInformation)
);
//
// Add PCI IO Port space available for PCI resource allocations.
//
BuildResourceDescriptorHob (
EFI_RESOURCE_IO,
EFI_RESOURCE_ATTRIBUTE_PRESENT |
EFI_RESOURCE_ATTRIBUTE_INITIALIZED,
0xC000,
0x4000
);
//
// Video memory + Legacy BIOS region
//
AddIoMemoryRangeHob (0x0A0000, BASE_1MB);
//
// Parse RAM in E820 map
//
Status = XenGetE820Map(&E820Map, &E820EntriesCount);
ASSERT_EFI_ERROR (Status);
if (E820EntriesCount > 0) {
EFI_E820_ENTRY64 *Entry;
UINT32 Loop;
for (Loop = 0; Loop < E820EntriesCount; Loop++) {
Entry = E820Map + Loop;
//
// Only care about RAM
//
if (Entry->Type != EfiAcpiAddressRangeMemory) {
continue;
}
if (Entry->BaseAddr >= BASE_4GB) {
AddUntestedMemoryBaseSizeHob (Entry->BaseAddr, Entry->Length);
} else {
AddMemoryBaseSizeHob (Entry->BaseAddr, Entry->Length);
}
MtrrSetMemoryAttribute (Entry->BaseAddr, Entry->Length, CacheWriteBack);
}
}
}