Changeset e3ce39b in mainline for kernel/arch/ia32/src/mm/page.c

Timestamp:

2010-05-31T19:08:26Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

6e2bf29

Parents:

a820bf7

Message:

Lock the page tables before working with them on ia32.

File:

• kernel/arch/ia32/src/mm/page.c (modified) (3 diffs)

kernel/arch/ia32/src/mm/page.c

@@ -61 +61 @@
                  * PA2KA(identity) mapping for all frames until last_frame.
                  */
+                page_table_lock(AS_KERNEL, true);
                 for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
                         flags = PAGE_CACHEABLE | PAGE_WRITE;
@@ -67 +68 @@
                         page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
                 }
+                page_table_unlock(AS_KERNEL, true);
                 
                 exc_register(14, "page_fault", (iroutine) page_fault);
@@ -84 +86 @@
         uintptr_t virtaddr = PA2KA(last_frame);
         pfn_t i;
+        page_table_lock(AS_KERNEL, true);
         for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) {
                 uintptr_t addr = PFN2ADDR(i);
                 page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE | PAGE_WRITE);
         }
+        page_table_unlock(AS_KERNEL, true);
         
         last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);