Some operating systems get a nasty shock if a region of the E820 map seems

to start on a non-page boundary.  Make life safer by rounding out our
edited regions.

src/include/gpxe/hidemem.h

@@ -8,38 +8,16 @@
  *
  */
 
-/**
- * A hidden region of Etherboot
- *
- * This represents a region that will be edited out of the system's
- * memory map.
- *
- * This structure is accessed by assembly code, so must not be
- * changed.
- */
-struct hidden_region {
-	/* Physical start address */
-	physaddr_t start;
-	/* Physical end address */
-	physaddr_t end;
-};
-
 /**
  * Unique IDs for hidden regions
  */
-enum {
+enum hidemem_region_id {
 	TEXT = 0,
 	BASEMEM,
 	EXTMEM,
 };
 
-extern struct hidden_region __data16_array ( hidden_regions, [] );
-#define hidden_regions __use_data16 ( hidden_regions )
-
-static inline void hide_region ( unsigned int region,
-				 physaddr_t start, physaddr_t end ) {
-	hidden_regions[region].start = start;
-	hidden_regions[region].end = end;
-}
+extern void hide_region ( unsigned int region_id, physaddr_t start,
+			  physaddr_t end );
 
 #endif /* _GPXE_HIDEMEM_H */