lmb: add lmb_is_reserved_flags

Add a new function lmb_is_reserved_flags to check if
an address is reserved with a specific flags.

This function can be used to check if an address was
reserved with no-map flags with:

lmb_is_reserved_flags(lmb, addr, LMB_NOMAP);
Signed-off-by: NPatrick Delaunay <patrick.delaunay@foss.st.com>

include/lmb.h

@@ -100,6 +100,15 @@ extern phys_addr_t lmb_alloc_addr(struct lmb *lmb, phys_addr_t base,
 				  phys_size_t size);
 extern phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr);
 extern int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr);
+/**
+ * lmb_is_reserved_flags - test if tha address is in reserved region with a bitfield flag
+ *
+ * @lmb		the logical memory block struct
+ * @addr	address to be tested
+ * @flags	flags bitfied to be tested
+ * @return 0 if not reserved or reserved without the requested flag else 1
+ */
+int lmb_is_reserved_flags(struct lmb *lmb, phys_addr_t addr, int flags);
 extern long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
 
 extern void lmb_dump_all(struct lmb *lmb);

lib/lmb.c

@@ -443,7 +443,7 @@ phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr)
 	return 0;
 }
 
-int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr)
+int lmb_is_reserved_flags(struct lmb *lmb, phys_addr_t addr, int flags)
 {
 	int i;
 
@@ -451,11 +451,16 @@ int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr)
 		phys_addr_t upper = lmb->reserved.region[i].base +
 			lmb->reserved.region[i].size - 1;
 		if ((addr >= lmb->reserved.region[i].base) && (addr <= upper))
-			return 1;
+			return (lmb->reserved.region[i].flags & flags) == flags;
 	}
 	return 0;
 }
 
+int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr)
+{
+	return lmb_is_reserved_flags(lmb, addr, LMB_NONE);
+}
+
 __weak void board_lmb_reserve(struct lmb *lmb)
 {
 	/* please define platform specific board_lmb_reserve() */