Changeset 83b6ba9f in mainline for kernel/generic/include/mm/as.h

Timestamp:

2014-02-18T00:18:48Z (10 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

8aaf9dc

Parents:

89dcf93

Message:

Support for AS area backend shared data.

• share_info_t is now created for every new address space area.
• share_info_t was extended to point to AS area backend shared data.
• AS area backend may decide to define create/destroy_shared_data() methods.
• Anonymous backend_phys frames are now freed from phys_destroy_shared_data().
• Fixed one case of forgotten locked mutex.

File:

• kernel/generic/include/mm/as.h (modified) (2 diffs)

kernel/generic/include/mm/as.h

@@ -140 +140 @@
         /** This structure can be deallocated if refcount drops to 0. */
         size_t refcount;
-        
+        /** True if the area has been ever shared. */
+        bool shared;
+
         /**
          * B+tree containing complete map of anonymous pages of the shared area.
          */
         btree_t pagemap;
+
+        /** Address space area backend. */
+        struct mem_backend *backend;
+        /** Address space area shared data. */
+        void *backend_shared_data;
 } share_info_t;
 
@@ -227 +234 @@
         int (* page_fault)(as_area_t *, uintptr_t, pf_access_t);
         void (* frame_free)(as_area_t *, uintptr_t, uintptr_t);
+
+        bool (* create_shared_data)(as_area_t *);
+        void (* destroy_shared_data)(void *);
 } mem_backend_t;