Changeset 6a22fcb in mainline for genarch/src/mm/as_pt.c

Timestamp:

2006-03-16T19:48:27Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

37c57f2

Parents:

b1fd4f0

Message:

Clear user address space when creating new page tables.
Fix mapping of l_apic and io_apic on amd64.

File:

• genarch/src/mm/as_pt.c (modified) (1 diff)

genarch/src/mm/as_pt.c

@@ -67 +67 @@
                 memsetb((__address) dst_ptl0, PAGE_SIZE, 0);
         } else {
+                __address src, dst;
+        
                 /*
                  * Copy the kernel address space portion to new PTL0.
-                 * TODO: copy only kernel address space.
                  */
                  
                 ipl = interrupts_disable();
-                spinlock_lock(&AS_KERNEL->lock);
+                spinlock_lock(&AS_KERNEL->lock);                
                 src_ptl0 = (pte_t *) PA2KA((__address) AS_KERNEL->page_table);
-                memcpy((void *) dst_ptl0,(void *) src_ptl0, PAGE_SIZE);
+
+                src = (__address) &src_ptl0[PTL0_INDEX(KERNEL_ADDRESS_SPACE_START)];
+                dst = (__address) &dst_ptl0[PTL0_INDEX(KERNEL_ADDRESS_SPACE_START)];
+
+                memsetb((__address) dst_ptl0, PAGE_SIZE, 0);
+                memcpy((void *) dst, (void *) src, PAGE_SIZE - (src - (__address) src_ptl0));
                 spinlock_unlock(&AS_KERNEL->lock);
                 interrupts_restore(ipl);