Implement BlEfiMemoryAllocatePages() and BlEfiMemoryFreePages() for manipulating memory pages

xtldr/efiutil.c

@@ -162,6 +162,27 @@ BlDbgPrint(IN PUINT16 Format,
     }
 }
 
+/**
+ * This routine allocates one or more 4KB pages.
+ *
+ * @param Size
+ *        The number of contiguous 4KB pages to allocate.
+ *
+ * @param Memory
+ *        The pointer to a physical address.
+ *
+ * @return This routine returns a status code.
+ *
+ * @since XT 1.0
+ */
+EFI_STATUS
+BlEfiMemoryAllocatePages(IN UINT64 Size,
+                         OUT PEFI_PHYSICAL_ADDRESS Memory)
+{
+    return EfiSystemTable->BootServices->AllocatePages(AllocateAnyPages, EfiRuntimeServicesData,
+                                                       EFI_SIZE_TO_PAGES(Size), Memory);
+}
+
 /**
  * This routine allocates a pool memory.
  *
@@ -183,6 +204,26 @@ BlEfiMemoryAllocatePool(IN UINT_PTR Size,
     return EfiSystemTable->BootServices->AllocatePool(EfiLoaderData, Size, Memory);
 }
 
+/**
+ * This routine frees memory pages.
+ *
+ * @param Size
+ *        The number of contiguous 4 KB pages to free.
+ *
+ * @param Memory
+ *        The base physical address of the pages to be freed.
+ *
+ * @return This routine returns a status code.
+ *
+ * @since XT 1.0
+ */
+EFI_STATUS
+BlEfiMemoryFreePages(IN UINT64 Size,
+                     IN EFI_PHYSICAL_ADDRESS Memory)
+{
+    return EfiSystemTable->BootServices->FreePages(Memory, Size);
+}
+
 /**
  * Returns pool memory to the system.
  *

xtldr/includes/xtbl.h

@@ -58,10 +58,18 @@ EFI_STATUS
 BlEfiGetSystemConfigurationTable(IN PEFI_GUID TableGuid,
                                  OUT PVOID *Table);
 
+EFI_STATUS
+BlEfiMemoryAllocatePages(IN UINT64 Size,
+                         OUT PEFI_PHYSICAL_ADDRESS Memory);
+
 EFI_STATUS
 BlEfiMemoryAllocatePool(IN UINT_PTR Size,
                         OUT PVOID *Memory);
 
+EFI_STATUS
+BlEfiMemoryFreePages(IN UINT64 Size,
+                     IN EFI_PHYSICAL_ADDRESS Memory);
+
 EFI_STATUS
 BlEfiMemoryFreePool(IN PVOID Memory);