EmbeddedPkg/PrePiMemoryAllocationLib: Added dummy FreePages()

This function is exposed by the MemoryAllocationLib header.
A dummy FreePages() function has been added to fix modules depending on
this library and this function.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>




git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14478 6f19259b-4bc3-4df7-8a09-765794883524

EmbeddedPkg/Library/PrePiMemoryAllocationLib/MemoryAllocationLib.c

@@ -130,7 +130,33 @@ AllocateAlignedPages (
 }
 
 
+/**
+  Frees one or more 4KB pages that were previously allocated with one of the page allocation
+  functions in the Memory Allocation Library.
 
+  Frees the number of 4KB pages specified by Pages from the buffer specified by Buffer.  Buffer
+  must have been allocated on a previous call to the page allocation services of the Memory
+  Allocation Library.  If it is not possible to free allocated pages, then this function will
+  perform no actions.
+
+  If Buffer was not allocated with a page allocation function in the Memory Allocation Library,
+  then ASSERT().
+  If Pages is zero, then ASSERT().
+
+  @param  Buffer                Pointer to the buffer of pages to free.
+  @param  Pages                 The number of 4 KB pages to free.
+
+**/
+VOID
+EFIAPI
+FreePages (
+  IN VOID   *Buffer,
+  IN UINTN  Pages
+  )
+{
+  // For now, we do not support the ability to free pages in the PrePei Memory Allocator.
+  // The allocated memory is lost.
+}
 
 /**
   Allocates a buffer of type EfiBootServicesData.