Changeset 6d7ffa65 in mainline for generic/src/mm/page.c

Timestamp:

2006-01-08T15:03:41Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

1a67595

Parents:

566ba81

Message:

Memory management work.
Move generic 4-level page table interface to genarch
and enable architectures to use different virtual memory
mechanisms (e.g. page hash tables).
Start page hash table support.
Switch ia64 and sparc64 to page hash tables.
Other architectures keep on using 4-level page table interface.

File:

• generic/src/mm/page.c (modified) (3 diffs)

generic/src/mm/page.c

@@ -34 +34 @@
 #include <arch/asm.h>
 #include <memstr.h>
+#include <debug.h>
+
+/** Virtual operations for page subsystem. */
+page_operations_t *page_operations = NULL;
 
 void page_init(void)
@@ -74 +78 @@
 void page_mapping_insert(__address page, __address frame, int flags, __address root)
 {
-        pte_t *ptl0, *ptl1, *ptl2, *ptl3;
-        __address newpt;
-
-        ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS());
-
-        if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) {
-                newpt = frame_alloc(FRAME_KA, ONE_FRAME);
-                memsetb(newpt, PAGE_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);
-        }
-
-        ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page)));
-
-        if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) {
-                newpt = frame_alloc(FRAME_KA, ONE_FRAME);
-                memsetb(newpt, PAGE_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);
-        }
-
-        ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page)));
-
-        if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) {
-                newpt = frame_alloc(FRAME_KA, ONE_FRAME);
-                memsetb(newpt, PAGE_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);
-        }
-
-        ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page)));
-
-        SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(page), frame);
-        SET_FRAME_FLAGS(ptl3, PTL3_INDEX(page), flags);
+        ASSERT(page_operations);
+        ASSERT(page_operations->mapping_insert);
+        
+        page_operations->mapping_insert(page, frame, flags, root);
 }
 
@@ -121 +95 @@
 pte_t *page_mapping_find(__address page, __address root)
 {
-        pte_t *ptl0, *ptl1, *ptl2, *ptl3;
+        ASSERT(page_operations);
+        ASSERT(page_operations->mapping_find);
 
-        ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS());
-
-        if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT)
-                return NULL;
-
-        ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page)));
-
-        if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT)
-                return NULL;
-
-        ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page)));
-
-        if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT)
-                return NULL;
-
-        ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page)));
-
-        return &ptl3[PTL3_INDEX(page)];
+        return page_operations->mapping_find(page, root);
 }