Changeset 2c0b348 in mainline

Timestamp:

2013-04-06T17:11:05Z (12 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

78aca91b

Parents:

3545c56

Message:

kernel: free memory in dmamem_unmap

Location:

kernel/generic

Files:

• include/mm/as.h (modified) (1 diff)
• src/ddi/ddi.c (modified) (1 diff)
• src/mm/as.c (modified) (1 diff)

kernel/generic/include/mm/as.h

@@ -250 +250 @@
 extern int as_area_change_flags(as_t *, unsigned int, uintptr_t);
 
+//TODO REMOVE!
+extern as_area_t * find_locked_area(as_t *as, uintptr_t va);
+
 extern unsigned int as_area_get_flags(as_area_t *);
 extern bool as_area_check_access(as_area_t *, pf_access_t);

kernel/generic/src/ddi/ddi.c

@@ -361 +361 @@
 NO_TRACE static int dmamem_unmap_anonymous(uintptr_t virt)
 {
-        // TODO: implement unlocking & unmap
-        return EOK;
+        // TODO: This is an ugly hack
+        as_t *as = TASK->as;
+
+        mutex_lock(&as->lock);
+        as_area_t *area = find_locked_area(as, virt);
+        if (!area) {
+                mutex_unlock(&as->lock);
+                return ENOENT;
+        }
+        frame_free_noreserve(area->backend_data.base);
+        area->backend_data.base = 0;
+        area->backend_data.frames = 0;
+        mutex_unlock(&area->lock);
+        mutex_unlock(&as->lock);
+
+        return as_area_destroy(as, virt);
 }
 

kernel/generic/src/mm/as.c

@@ -672 +672 @@
         
         return NULL;
+}
+
+/** UGLY! UGLY! UGLY! */
+// TODO: REMOVE ASAP!
+as_area_t * find_locked_area(as_t *as, uintptr_t va)
+{
+        return find_area_and_lock(as, va);
 }