Changeset 03523dc in mainline for kernel/generic/src/mm/backend_phys.c

Timestamp:

2011-01-15T16:12:46Z (14 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

6b9e85b

Parents:

630a8ef

Message:

Add more hooks to address space area backends so that each backend can
take action also on:

• as_area_create()
• as_area_resize()
• as_area_destroy()

Add basic memory reservation code to anonymous and elf address space
area backends.

File:

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

kernel/generic/src/mm/backend_phys.c

@@ -48 +48 @@
 #include <align.h>
 
+static bool phys_create(as_area_t *);
+static void phys_share(as_area_t *area);
+static void phys_destroy(as_area_t *);
+
 static int phys_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access);
-static void phys_share(as_area_t *area);
 
 mem_backend_t phys_backend = {
+        .create = phys_create,
+        .resize = NULL,
+        .share = phys_share,
+        .destroy = phys_destroy,
+
         .page_fault = phys_page_fault,
         .frame_free = NULL,
-        .share = phys_share
 };
+
+bool phys_create(as_area_t *area)
+{
+        return true;
+}
+
+/** Share address space area backed by physical memory.
+ *
+ * Do actually nothing as sharing of address space areas
+ * that are backed up by physical memory is very easy.
+ * Note that the function must be defined so that
+ * as_area_share() will succeed.
+ */
+void phys_share(as_area_t *area)
+{
+        ASSERT(mutex_locked(&area->as->lock));
+        ASSERT(mutex_locked(&area->lock));
+}
+
+
+void phys_destroy(as_area_t *area)
+{
+        /* Nothing to do. */
+}
 
 /** Service a page fault in the address space area backed by physical memory.
@@ -87 +118 @@
 }
 
-/** Share address space area backed by physical memory.
- *
- * Do actually nothing as sharing of address space areas
- * that are backed up by physical memory is very easy.
- * Note that the function must be defined so that
- * as_area_share() will succeed.
- */
-void phys_share(as_area_t *area)
-{
-        ASSERT(mutex_locked(&area->as->lock));
-        ASSERT(mutex_locked(&area->lock));
-}
-
 /** @}
  */