Changeset 1ace9ea in mainline

Timestamp:

2006-04-12T17:05:36Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

a6d4ceb

Parents:

9a8d91b

Message:

Add some sanity checks to make sure the address space created by SYS_MAM_PHYSMEM will not be remapped
and that as_page_fault() will not try to service page fault for that area.

File:

• generic/src/mm/as.c (modified) (2 diffs)

generic/src/mm/as.c

@@ -225 +225 @@
         }
 
+        ASSERT(!(area->flags & AS_AREA_DEVICE));
+
         page_table_lock(AS, false);
         
@@ -443 +445 @@
         area = find_area_and_lock(as, address);
         if (!area) {
+                spinlock_unlock(&as->lock);
+                interrupts_restore(ipl);
+                return (__address) -1;
+        }
+
+        if (area->flags & AS_AREA_DEVICE) {
+                /*
+                 * Remapping of address space areas associated
+                 * with memory mapped devices is not supported.
+                 */
+                spinlock_unlock(&area->lock);
                 spinlock_unlock(&as->lock);
                 interrupts_restore(ipl);