Changeset 0ee077ee in mainline for generic/src/ddi/ddi.c

Timestamp:

2006-05-27T17:50:30Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

127c957b

Parents:

fb84455

Message:

Move the sharing functionality to address space area backends.
Add backend for continuous regions of physical memory.
Sharing for these areas works automagically now.

File:

• generic/src/ddi/ddi.c (modified) (3 diffs)

generic/src/ddi/ddi.c

@@ -66 +66 @@
         task_t *t;
         int flags;
-        count_t i;
+        mem_backend_data_t backend_data = { .d1 = (__native) pf, .d2 = (__native) pages };
         
         /*
@@ -99 +99 @@
         spinlock_unlock(&tasks_lock);
         
-        flags = AS_AREA_DEVICE | AS_AREA_READ;
+        flags = AS_AREA_READ;
         if (writable)
                 flags |= AS_AREA_WRITE;
-        if (!as_area_create(t->as, flags, pages * PAGE_SIZE, vp, AS_AREA_ATTR_NONE, NULL, NULL)) {
+        if (!as_area_create(t->as, flags, pages * PAGE_SIZE, vp, AS_AREA_ATTR_NONE,
+                &phys_backend, &backend_data)) {
                 /*
                  * The address space area could not have been created.
@@ -112 +113 @@
         }
         
-        /* Initialize page tables. */
-        for (i = 0; i < pages; i++)
-                as_set_mapping(t->as, vp + i * PAGE_SIZE, pf + i * FRAME_SIZE);
-
+        /*
+         * Mapping is created on-demand during page fault.
+         */
+        
         spinlock_unlock(&t->lock);
         interrupts_restore(ipl);