Changeset 59fb782 in mainline for kernel/generic/src/mm/backend_anon.c

Timestamp:

2013-03-24T19:38:18Z (11 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

d965dc3

Parents:

119b46e

Message:

Unify the use of virtual addresses and virtual page addresses in mm code.

• as_page_fault() accepts faulting address (if available) and propagates the faulting page further along
• backends' page_fault() handlers assume page fault address
• page_mapping_create/destroy/find() accept addresses, but pass only page and frame addresses along
• as_area_create(), as_area_resize() now test whether the address is page-aligned
• renames of various variables to better fit their purpose (address vs. page)
• no need to align the addresses in mips32 TLB exception handlers now

File:

• kernel/generic/src/mm/backend_anon.c (modified) (3 diffs)

kernel/generic/src/mm/backend_anon.c

@@ -173 +173 @@
  *
  * @param area Pointer to the address space area.
- * @param addr Faulting virtual address.
+ * @param upage Faulting virtual page.
  * @param access Access mode that caused the fault (i.e. read/write/exec).
  *
@@ -179 +179 @@
  *     serviced).
  */
-int anon_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access)
-{
-        uintptr_t upage = ALIGN_DOWN(addr, PAGE_SIZE);
+int anon_page_fault(as_area_t *area, uintptr_t upage, pf_access_t access)
+{
         uintptr_t kpage;
         uintptr_t frame;
@@ -187 +186 @@
         ASSERT(page_table_locked(AS));
         ASSERT(mutex_locked(&area->lock));
+        ASSERT(IS_ALIGNED(upage, PAGE_SIZE));
 
         if (!as_area_check_access(area, access))