diff options
Diffstat (limited to 'MdeModulePkg/Core/Dxe/Gcd/Gcd.c')
| -rw-r--r-- | MdeModulePkg/Core/Dxe/Gcd/Gcd.c | 72 |
1 files changed, 69 insertions, 3 deletions
diff --git a/MdeModulePkg/Core/Dxe/Gcd/Gcd.c b/MdeModulePkg/Core/Dxe/Gcd/Gcd.c index 792cd2e..c450d1b 100644 --- a/MdeModulePkg/Core/Dxe/Gcd/Gcd.c +++ b/MdeModulePkg/Core/Dxe/Gcd/Gcd.c @@ -2238,6 +2238,8 @@ CoreInitializeMemoryServices ( EFI_HOB_HANDOFF_INFO_TABLE *PhitHob;
EFI_HOB_RESOURCE_DESCRIPTOR *ResourceHob;
EFI_HOB_RESOURCE_DESCRIPTOR *PhitResourceHob;
+ EFI_HOB_RESOURCE_DESCRIPTOR *MemoryTypeInformationResourceHob;
+ UINTN Count;
EFI_PHYSICAL_ADDRESS BaseAddress;
UINT64 Length;
UINT64 Attributes;
@@ -2289,12 +2291,47 @@ CoreInitializeMemoryServices ( //
// See if a Memory Type Information HOB is available
//
- GuidHob = GetFirstGuidHob (&gEfiMemoryTypeInformationGuid);
+ MemoryTypeInformationResourceHob = NULL;
+ GuidHob = GetFirstGuidHob (&gEfiMemoryTypeInformationGuid);
if (GuidHob != NULL) {
EfiMemoryTypeInformation = GET_GUID_HOB_DATA (GuidHob);
DataSize = GET_GUID_HOB_DATA_SIZE (GuidHob);
if ((EfiMemoryTypeInformation != NULL) && (DataSize > 0) && (DataSize <= (EfiMaxMemoryType + 1) * sizeof (EFI_MEMORY_TYPE_INFORMATION))) {
CopyMem (&gMemoryTypeInformation, EfiMemoryTypeInformation, DataSize);
+
+ //
+ // Look for Resource Descriptor HOB with a ResourceType of System Memory
+ // and an Owner GUID of gEfiMemoryTypeInformationGuid. If more than 1 is
+ // found, then set MemoryTypeInformationResourceHob to NULL.
+ //
+ Count = 0;
+ for (Hob.Raw = *HobStart; !END_OF_HOB_LIST (Hob); Hob.Raw = GET_NEXT_HOB (Hob)) {
+ if (GET_HOB_TYPE (Hob) != EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
+ continue;
+ }
+
+ ResourceHob = Hob.ResourceDescriptor;
+ if (!CompareGuid (&ResourceHob->Owner, &gEfiMemoryTypeInformationGuid)) {
+ continue;
+ }
+
+ Count++;
+ if (ResourceHob->ResourceType != EFI_RESOURCE_SYSTEM_MEMORY) {
+ continue;
+ }
+
+ if ((ResourceHob->ResourceAttribute & MEMORY_ATTRIBUTE_MASK) != TESTED_MEMORY_ATTRIBUTES) {
+ continue;
+ }
+
+ if (ResourceHob->ResourceLength >= CalculateTotalMemoryBinSizeNeeded ()) {
+ MemoryTypeInformationResourceHob = ResourceHob;
+ }
+ }
+
+ if (Count > 1) {
+ MemoryTypeInformationResourceHob = NULL;
+ }
}
}
@@ -2345,6 +2382,15 @@ CoreInitializeMemoryServices ( Found = TRUE;
//
+ // If a Memory Type Information Resource HOB was found and is the same
+ // Resource HOB that describes the PHIT HOB, then ignore the Memory Type
+ // Information Resource HOB.
+ //
+ if (MemoryTypeInformationResourceHob == PhitResourceHob) {
+ MemoryTypeInformationResourceHob = NULL;
+ }
+
+ //
// Compute range between PHIT EfiMemoryTop and the end of the Resource Descriptor HOB
//
Attributes = PhitResourceHob->ResourceAttribute;
@@ -2387,8 +2433,9 @@ CoreInitializeMemoryServices ( if (Length < MinimalMemorySizeNeeded) {
//
// Search all the resource descriptor HOBs from the highest possible addresses down for a memory
- // region that is big enough to initialize the DXE core. Always skip the PHIT Resource HOB.
- // The max address must be within the physically addressible range for the processor.
+ // region that is big enough to initialize the DXE core. Always skip the PHIT Resource HOB
+ // and the Memory Type Information Resource HOB. The max address must be within the physically
+ // addressable range for the processor.
//
HighAddress = MAX_ALLOC_ADDRESS;
for (Hob.Raw = *HobStart; !END_OF_HOB_LIST (Hob); Hob.Raw = GET_NEXT_HOB (Hob)) {
@@ -2400,6 +2447,13 @@ CoreInitializeMemoryServices ( }
//
+ // Skip the Resource Descriptor HOB that contains Memory Type Information bins
+ //
+ if (Hob.ResourceDescriptor == MemoryTypeInformationResourceHob) {
+ continue;
+ }
+
+ //
// Skip all HOBs except Resource Descriptor HOBs
//
if (GET_HOB_TYPE (Hob) != EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
@@ -2466,6 +2520,18 @@ CoreInitializeMemoryServices ( Capabilities = CoreConvertResourceDescriptorHobAttributesToCapabilities (EfiGcdMemoryTypeSystemMemory, Attributes);
}
+ if (MemoryTypeInformationResourceHob != NULL) {
+ //
+ // If a Memory Type Information Resource HOB was found, then use the address
+ // range of the Memory Type Information Resource HOB as the preferred
+ // address range for the Memory Type Information bins.
+ //
+ CoreSetMemoryTypeInformationRange (
+ MemoryTypeInformationResourceHob->PhysicalStart,
+ MemoryTypeInformationResourceHob->ResourceLength
+ );
+ }
+
//
// Declare the very first memory region, so the EFI Memory Services are available.
//
|