Export is_mem_free() function

The is_mem_free() function used to be local to bl_common.c.
This patch exports it so that it can be used outside of bl_common.c.

Change-Id: I01dcb4229f3a36f56a4724b567c5e6c416dc5e98
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>

common/bl_common.c

@@ -53,14 +53,13 @@ uintptr_t page_align(uintptr_t value, unsigned dir)
 	return value;
 }
 
-#if !LOAD_IMAGE_V2
 /******************************************************************************
  * Determine whether the memory region delimited by 'addr' and 'size' is free,
  * given the extents of free memory.
  * Return 1 if it is free, 0 if it is not free or if the input values are
  * invalid.
  *****************************************************************************/
-static int is_mem_free(uintptr_t free_base, size_t free_size,
+int is_mem_free(uintptr_t free_base, size_t free_size,
 		uintptr_t addr, size_t size)
 {
 	uintptr_t free_end, requested_end;
@@ -97,6 +96,7 @@ static int is_mem_free(uintptr_t free_base, size_t free_size,
 	return (addr >= free_base) && (requested_end <= free_end);
 }
 
+#if !LOAD_IMAGE_V2
 /******************************************************************************
  * Inside a given memory region, determine whether a sub-region of memory is
  * closer from the top or the bottom of the encompassing region. Return the

include/common/bl_common.h

@@ -361,6 +361,9 @@ CASSERT(sizeof(uintptr_t) ==
  ******************************************************************************/
 size_t image_size(unsigned int image_id);
 
+int is_mem_free(uintptr_t free_base, size_t free_size,
+		uintptr_t addr, size_t size);
+
 #if LOAD_IMAGE_V2
 
 int load_image(unsigned int image_id, image_info_t *image_data);