Changeset 3a2b636 in mainline

Timestamp:

2010-05-31T20:28:52Z (14 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

1d432f9

Parents:

b0b2ac1

Message:

Lock the page tables before working with them on arm32.

File:

• kernel/arch/arm32/src/mm/page.c (modified) (4 diffs)

kernel/arch/arm32/src/mm/page.c

@@ -53 +53 @@
         int flags = PAGE_CACHEABLE;
         page_mapping_operations = &pt_mapping_operations;
+
+        page_table_lock(AS_KERNEL, true);
         
         uintptr_t cur;
@@ -66 +68 @@
 #error "Only high exception vector supported now"
 #endif
+
+        page_table_unlock(AS_KERNEL, true);
         
         as_switch(NULL, AS_KERNEL);
@@ -92 +96 @@
         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++) {
                 page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i),
@@ -97 +103 @@
                     PAGE_NOT_CACHEABLE | PAGE_READ | PAGE_WRITE | PAGE_KERNEL);
         }
+        page_table_unlock(AS_KERNEL, true);
         
         last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);