BL_MEMORY_DESCRIPTOR MmStaticMemoryDescriptors[512];
ULONG MmGlobalMemoryDescriptorCount;
PBL_MEMORY_DESCRIPTOR MmGlobalMemoryDescriptors;
-BOOLEAN MmGlobalMemoryDescriptorsUsed;
+ULONG MmGlobalMemoryDescriptorsUsed;
PBL_MEMORY_DESCRIPTOR MmDynamicMemoryDescriptors;
ULONG MmDynamicMemoryDescriptorCount;
}
}
+ULONG
+MmMdCountList (
+ _In_ PBL_MEMORY_DESCRIPTOR_LIST MdList
+ )
+{
+ PLIST_ENTRY First, NextEntry;
+ ULONG Count;
+
+ /* Iterate the list */
+ for (Count = 0, First = MdList->First, NextEntry = First->Flink;
+ NextEntry != First;
+ NextEntry = NextEntry->Flink, Count++);
+
+ /* Return the count */
+ return Count;
+}
+
+VOID
+MmMdInitializeList (
+ _In_ PBL_MEMORY_DESCRIPTOR_LIST MdList,
+ _In_ ULONG Type,
+ _In_ PLIST_ENTRY ListHead
+ )
+{
+ /* Check if a list was specified */
+ if (ListHead)
+ {
+ /* Use it */
+ MdList->First = ListHead;
+ }
+ else
+ {
+ /* Otherwise, use the internal, built-in list */
+ InitializeListHead(&MdList->ListHead);
+ MdList->First = &MdList->ListHead;
+ }
+
+ /* Set the type */
+ MdList->Type = Type;
+
+ /* Initialize current iterator to nothing */
+ MdList->This = NULL;
+}
+
+NTSTATUS
+MmMdCopyList (
+ _In_ PBL_MEMORY_DESCRIPTOR_LIST DestinationList,
+ _In_ PBL_MEMORY_DESCRIPTOR_LIST SourceList,
+ _In_opt_ PBL_MEMORY_DESCRIPTOR ListDescriptor,
+ _Out_ PULONG ActualCount,
+ _In_ ULONG Count,
+ _In_ ULONG Flags
+ )
+{
+ NTSTATUS Status;
+ PULONG Used;
+ PLIST_ENTRY First, NextEntry;
+ PBL_MEMORY_DESCRIPTOR Descriptor;
+
+ /* Both parameters must be present */
+ if (!(DestinationList) || !(SourceList))
+ {
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ /* Assume success */
+ Status = STATUS_SUCCESS;
+
+ /* Check if a descriptor is being used to store the list */
+ if (ListDescriptor)
+ {
+ /* See how big it is */
+ Flags |= BL_MM_ADD_DESCRIPTOR_NEVER_COALESCE_FLAG;
+ Used = ActualCount;
+ }
+ else
+ {
+ /* We are using our internal descriptors instead */
+ Used = &MmGlobalMemoryDescriptorsUsed;
+ ++MmDescriptorCallTreeCount;
+
+ /* Use as many as are available */
+ Count = MmGlobalMemoryDescriptorCount;
+ ListDescriptor = MmGlobalMemoryDescriptors;
+ }
+
+ /* Never truncate descriptors during a list copy */
+ Flags |= BL_MM_ADD_DESCRIPTOR_NEVER_TRUNCATE_FLAG;
+
+ /* Iterate through the list */
+ First = SourceList->First;
+ NextEntry = First->Flink;
+ while ((NextEntry != First) && (NT_SUCCESS(Status)))
+ {
+ /* Make sure there's still space */
+ if (Count <= *Used)
+ {
+ Status = STATUS_NO_MEMORY;
+ break;
+ }
+
+ /* Get the current descriptor */
+ Descriptor = CONTAINING_RECORD(NextEntry,
+ BL_MEMORY_DESCRIPTOR,
+ ListEntry);
+
+ /* Copy it into one of the descriptors we have */
+ RtlCopyMemory(&ListDescriptor[*Used],
+ Descriptor,
+ sizeof(*Descriptor));
+
+ /* Add it to the list we have */
+ Status = MmMdAddDescriptorToList(DestinationList,
+ &ListDescriptor[*Used],
+ Flags);
+ ++*Used;
+
+ /* Move to the next entry */
+ NextEntry = NextEntry->Flink;
+ }
+
+ /* Check if the global descriptors were used */
+ if (ListDescriptor == MmGlobalMemoryDescriptors)
+ {
+ /* Unwind our usage */
+ MmMdFreeGlobalDescriptors();
+ --MmDescriptorCallTreeCount;
+ }
+
+ /* Return back to caller */
+ return Status;
+}
+
VOID
MmMdRemoveDescriptorFromList (
_In_ PBL_MEMORY_DESCRIPTOR_LIST MdList,
/* Remove the entry */
RemoveEntryList(&Entry->ListEntry);
- /* Check if this was the current link */
+ /* Check if this was the current link */
if (MdList->This == &Entry->ListEntry)
{
/* Remove the current link and set the next one */
FoundPageCount = Descriptor->PageCount;
FoundEndPage = FoundBasePage + FoundPageCount;
EndPage = PageCount + BasePage;
- //EarlyPrint(L"Looking for Region 0x%08I64X-0x%08I64X in 0x%08I64X-0x%08I64X\r\n", BasePage, EndPage, FoundBasePage, FoundEndPage);
/* Make a copy of the original descriptor */
RtlCopyMemory(&NewDescriptor, NextEntry, sizeof(NewDescriptor));
/* Check if the found region starts after the region or ends before the region */
if ((FoundBasePage >= BasePage) || (EndPage >= FoundEndPage))
{
- /* This descriptor doesn't cover any part of the range */
- //EarlyPrint(L"No part of this descriptor contains the region\r\n");
+ /* This descriptor doesn't cover any part of the range -- nothing to do */
+ NOTHING;
}
else
{
- /* This descriptor covers the head of the allocation */
- //EarlyPrint(L"Descriptor covers the head of the region\r\n");
+ /* This descriptor fully covers the entire allocation */
+ FoundBasePage = Descriptor->BasePage;
+ FoundPageCount = BasePage - FoundBasePage;
+
+ /* This is how many pages we will eat away from the descriptor */
+ RegionSize = FoundPageCount + PageCount;
+
+ /* Update the descriptor to account for the consumed pages */
+ Descriptor->BasePage += RegionSize;
+ Descriptor->PageCount -= RegionSize;
+ if (Descriptor->VirtualPage)
+ {
+ Descriptor->VirtualPage += RegionSize;
+ }
+
+ /* Initialize a descriptor for the start of the region */
+ Descriptor = MmMdInitByteGranularDescriptor(Descriptor->Flags,
+ Descriptor->Type,
+ FoundBasePage,
+ Descriptor->VirtualPage,
+ FoundPageCount);
+ if (!Descriptor)
+ {
+ Status = STATUS_NO_MEMORY;
+ goto Quickie;
+ }
+
+ /* Add it into the list */
+ Status = MmMdAddDescriptorToList(MdList, Descriptor, Flags);
+ if (!NT_SUCCESS(Status))
+ {
+ Status = STATUS_NO_MEMORY;
+ goto Quickie;
+ }
}
}
else
{
/* This descriptor contains the entire allocation */
- //EarlyPrint(L"Descriptor contains the entire region\r\n");
+ RegionSize = FoundEndPage - BasePage;
+ Descriptor->PageCount -= RegionSize;
}
/* Keep going */
*
* So first, figure out if we cover the entire end or not
*/
- if (EndPage > FoundEndPage)
+ if (EndPage < FoundEndPage)
{
/* The allocation goes past the end of this descriptor */
- EndPage = FoundEndPage;
+ FoundEndPage = EndPage;
}
/* This is how many pages we will eat away from the descriptor */
- RegionSize = EndPage - FoundBasePage;
+ RegionSize = FoundEndPage - FoundBasePage;
/* Update the descriptor to account for the consumed pages */
Descriptor->BasePage += RegionSize;
if (!Descriptor->PageCount)
{
/* Remove it */
- //EarlyPrint(L"Entire descriptor consumed\r\n");
MmMdRemoveDescriptorFromList(MdList, Descriptor);
MmMdFreeDescriptor(Descriptor);
return Status;
}
+PBL_MEMORY_DESCRIPTOR
+MmMdFindDescriptorFromMdl (
+ _In_ PBL_MEMORY_DESCRIPTOR_LIST MdList,
+ _In_ ULONG Flags,
+ _In_ ULONGLONG Page
+ )
+{
+ BOOLEAN IsVirtual;
+ PLIST_ENTRY NextEntry, ListHead;
+ PBL_MEMORY_DESCRIPTOR Current;
+ ULONGLONG BasePage;
+
+ /* Assume physical */
+ IsVirtual = FALSE;
+
+ /* Check if the caller wants physical memory */
+ if (!(Flags & BL_MM_REMOVE_VIRTUAL_REGION_FLAG))
+ {
+ /* Check if this is a virtual memory list */
+ if (MdList->Type == BlMdVirtual)
+ {
+ /* We won't find anything */
+ return NULL;
+ }
+ }
+ else if (MdList->Type == BlMdPhysical)
+ {
+ /* Otherwise, caller wants virtual, but this is a physical list */
+ IsVirtual = TRUE;
+ NextEntry = MdList->First->Flink;
+ }
+
+ /* Check if this is a physical search */
+ if (!IsVirtual)
+ {
+ /* Check if we can use the current pointer */
+ NextEntry = MdList->This;
+ if (!NextEntry)
+ {
+ /* We can't -- start at the beginning */
+ NextEntry = MdList->First->Flink;
+ }
+ else
+ {
+ /* If the page is below the current pointer, restart */
+ Current = CONTAINING_RECORD(NextEntry, BL_MEMORY_DESCRIPTOR, ListEntry);
+ if (Page < Current->BasePage)
+ {
+ NextEntry = MdList->First->Flink;
+ }
+ }
+ }
+
+ /* Loop the list of descriptors */
+ ListHead = MdList->First;
+ while (NextEntry != ListHead)
+ {
+ /* Get the current one */
+ Current = CONTAINING_RECORD(NextEntry, BL_MEMORY_DESCRIPTOR, ListEntry);
+
+ /* Check if we are looking for virtual memory */
+ if (IsVirtual)
+ {
+ /* Use the base address */
+ BasePage = Current->VirtualPage;
+ }
+ else
+ {
+ /* Use the page */
+ BasePage = Current->BasePage;
+ }
+
+ /* If this is a virtual descriptor, make sure it has a base address */
+ if ((!(IsVirtual) || (BasePage)) &&
+ (BasePage <= Page) &&
+ (Page < (BasePage + Current->PageCount)))
+ {
+ /* The descriptor fits the page being requested */
+ return Current;
+ }
+
+ /* Try the next one */
+ NextEntry = NextEntry->Flink;
+ }
+
+ /* Nothing found if we're here */
+ return NULL;
+}
+
+PBL_MEMORY_DESCRIPTOR
+MmMdFindDescriptor (
+ _In_ ULONG WhichList,
+ _In_ ULONG Flags,
+ _In_ ULONGLONG Page
+ )
+{
+ PBL_MEMORY_DESCRIPTOR FoundDescriptor;
+
+ /* Check if the caller is looking for mapped, allocated memory */
+ if (WhichList & BL_MM_INCLUDE_MAPPED_ALLOCATED)
+ {
+ /* Find a descriptor in that list */
+ FoundDescriptor = MmMdFindDescriptorFromMdl(&MmMdlMappedAllocated, Flags, Page);
+ if (FoundDescriptor)
+ {
+ /* Got it */
+ return FoundDescriptor;
+ }
+ }
+
+ /* Check if the caller is looking for mapped, unallocated memory */
+ if (WhichList & BL_MM_INCLUDE_MAPPED_UNALLOCATED)
+ {
+ /* Find a descriptor in that list */
+ FoundDescriptor = MmMdFindDescriptorFromMdl(&MmMdlMappedUnallocated, Flags, Page);
+ if (FoundDescriptor)
+ {
+ /* Got it */
+ return FoundDescriptor;
+ }
+ }
+
+ /* Check if the caller is looking for unmapped, allocated memory */
+ if (WhichList & BL_MM_INCLUDE_UNMAPPED_ALLOCATED)
+ {
+ /* Find a descriptor in that list */
+ FoundDescriptor = MmMdFindDescriptorFromMdl(&MmMdlUnmappedAllocated, Flags, Page);
+ if (FoundDescriptor)
+ {
+ /* Got it */
+ return FoundDescriptor;
+ }
+ }
+
+ /* Check if the caller is looking for unmapped, unallocated memory */
+ if (WhichList & BL_MM_INCLUDE_UNMAPPED_UNALLOCATED)
+ {
+ /* Find a descriptor in that list */
+ FoundDescriptor = MmMdFindDescriptorFromMdl(&MmMdlUnmappedUnallocated, Flags, Page);
+ if (FoundDescriptor)
+ {
+ /* Got it */
+ return FoundDescriptor;
+ }
+ }
+
+ /* Check if the caller is looking for reserved, allocated memory */
+ if (WhichList & BL_MM_INCLUDE_RESERVED_ALLOCATED)
+ {
+ /* Find a descriptor in that list */
+ FoundDescriptor = MmMdFindDescriptorFromMdl(&MmMdlReservedAllocated, Flags, Page);
+ if (FoundDescriptor)
+ {
+ /* Got it */
+ return FoundDescriptor;
+ }
+ }
+
+ /* Check if the caller is looking for bad memory */
+ if (WhichList & BL_MM_INCLUDE_BAD_MEMORY)
+ {
+ /* Find a descriptor in that list */
+ FoundDescriptor = MmMdFindDescriptorFromMdl(&MmMdlBadMemory, Flags, Page);
+ if (FoundDescriptor)
+ {
+ /* Got it */
+ return FoundDescriptor;
+ }
+ }
+
+ /* Check if the caller is looking for truncated memory */
+ if (WhichList & BL_MM_INCLUDE_TRUNCATED_MEMORY)
+ {
+ /* Find a descriptor in that list */
+ FoundDescriptor = MmMdFindDescriptorFromMdl(&MmMdlTruncatedMemory, Flags, Page);
+ if (FoundDescriptor)
+ {
+ /* Got it */
+ return FoundDescriptor;
+ }
+ }
+
+ /* Check if the caller is looking for persistent memory */
+ if (WhichList & BL_MM_INCLUDE_PERSISTENT_MEMORY)
+ {
+ /* Find a descriptor in that list */
+ FoundDescriptor = MmMdFindDescriptorFromMdl(&MmMdlPersistentMemory, Flags, Page);
+ if (FoundDescriptor)
+ {
+ /* Got it */
+ return FoundDescriptor;
+ }
+ }
+
+ /* Nothing if we got here */
+ return NULL;
+}
+
BOOLEAN
MmMdFindSatisfyingRegion (
_In_ PBL_MEMORY_DESCRIPTOR Descriptor,
}
/* Bail out if the allocation flags don't match */
- if (((Flags ^ Descriptor->Flags) & (BlMemoryRuntime | BlMemoryReserved | BlMemoryUnknown)))
+ if (((Flags ^ Descriptor->Flags) & (BlMemoryRuntime | BlMemoryBelow1MB | BlMemoryLargePages)))
{
//EfiPrintf(L"Incorrect memory allocation flags\r\n");
return FALSE;
MmGlobalMemoryDescriptorCount = RTL_NUMBER_OF(MmStaticMemoryDescriptors);
MmGlobalMemoryDescriptors = MmStaticMemoryDescriptors;
RtlZeroMemory(MmStaticMemoryDescriptors, sizeof(MmStaticMemoryDescriptors));
- MmGlobalMemoryDescriptorsUsed = FALSE;
+ MmGlobalMemoryDescriptorsUsed = 0;
}
}
projects / reactos.git / blobdiff