Changes in kernel/generic/src/mm/backend_phys.c [cda1378:59fb782] in mainline

File:

• kernel/generic/src/mm/backend_phys.c (modified) (6 diffs)

kernel/generic/src/mm/backend_phys.c

@@ -52 +52 @@
 static void phys_destroy(as_area_t *);
 
+static bool phys_is_resizable(as_area_t *);
+static bool phys_is_shareable(as_area_t *);
+
+
 static int phys_page_fault(as_area_t *, uintptr_t, pf_access_t);
 
@@ -59 +63 @@
         .share = phys_share,
         .destroy = phys_destroy,
+
+        .is_resizable = phys_is_resizable,
+        .is_shareable = phys_is_shareable,
 
         .page_fault = phys_page_fault,
@@ -88 +95 @@
 }
 
+bool phys_is_resizable(as_area_t *area)
+{
+        return false;
+}
+
+bool phys_is_shareable(as_area_t *area)
+{
+        return true;
+}
+
+
 /** Service a page fault in the address space area backed by physical memory.
  *
@@ -93 +111 @@
  *
  * @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).
  *
@@ -99 +117 @@
  * serviced).
  */
-int phys_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access)
+int phys_page_fault(as_area_t *area, uintptr_t upage, pf_access_t access)
 {
         uintptr_t base = area->backend_data.base;
@@ -105 +123 @@
         ASSERT(page_table_locked(AS));
         ASSERT(mutex_locked(&area->lock));
+        ASSERT(IS_ALIGNED(upage, PAGE_SIZE));
 
         if (!as_area_check_access(area, access))
                 return AS_PF_FAULT;
 
-        ASSERT(addr - area->base < area->backend_data.frames * FRAME_SIZE);
-        page_mapping_insert(AS, addr, base + (addr - area->base),
+        ASSERT(upage - area->base < area->backend_data.frames * FRAME_SIZE);
+        page_mapping_insert(AS, upage, base + (upage - area->base),
             as_area_get_flags(area));
         
-        if (!used_space_insert(area, ALIGN_DOWN(addr, PAGE_SIZE), 1))
+        if (!used_space_insert(area, upage, 1))
                 panic("Cannot insert used space.");