Changeset 6b326ea1 in mainline for kernel/genarch/src/mm/page_pt.c

Timestamp:

2011-11-17T13:51:41Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

a55ddc64

Parents:

9d4e170

Message:

Allocate page tables from low memory so that it will be still possible
to use PA2KA when walking it.

File:

• kernel/genarch/src/mm/page_pt.c (modified) (3 diffs)

kernel/genarch/src/mm/page_pt.c

@@ -75 +75 @@
         
         if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) {
-                pte_t *newpt = (pte_t *) frame_alloc(PTL1_SIZE, FRAME_KA);
+                pte_t *newpt = (pte_t *) frame_alloc(PTL1_SIZE,
+                    FRAME_LOWMEM | FRAME_KA);
                 memsetb(newpt, FRAME_SIZE << PTL1_SIZE, 0);
                 SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt));
-                SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE);
+                SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page),
+                    PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE |
+                    PAGE_WRITE);
         }
         
@@ -84 +87 @@
         
         if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) {
-                pte_t *newpt = (pte_t *) frame_alloc(PTL2_SIZE, FRAME_KA);
+                pte_t *newpt = (pte_t *) frame_alloc(PTL2_SIZE,
+                    FRAME_LOWMEM | FRAME_KA);
                 memsetb(newpt, FRAME_SIZE << PTL2_SIZE, 0);
                 SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt));
-                SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE);
+                SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page),
+                    PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE |
+                    PAGE_WRITE);
         }
         
@@ -93 +99 @@
         
         if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) {
-                pte_t *newpt = (pte_t *) frame_alloc(PTL3_SIZE, FRAME_KA);
+                pte_t *newpt = (pte_t *) frame_alloc(PTL3_SIZE,
+                    FRAME_LOWMEM | FRAME_KA);
                 memsetb(newpt, FRAME_SIZE << PTL3_SIZE, 0);
                 SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt));
-                SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE);
+                SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page),
+                    PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE |
+                    PAGE_WRITE);
         }