Changeset a98d2ec in mainline

Timestamp:

2005-12-11T14:00:19Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

dd14cced

Parents:

7910cff

Message:

TLB invalidation functions for mips32. Not deployed yet. Not tested.

File:

• arch/mips32/src/mm/tlb.c (modified) (3 diffs)

arch/mips32/src/mm/tlb.c

@@ -56 +56 @@
 void tlb_arch_init(void)
 {
-        int i;
-
         cp0_pagemask_write(TLB_PAGE_MASK_16K);
-        cp0_entry_hi_write(0);
-        cp0_entry_lo0_write(0);
-        cp0_entry_lo1_write(0);
-
-        /*
-         * Invalidate all entries.
-         */
-        for (i = 0; i < TLB_ENTRY_COUNT; i++) {
-                cp0_index_write(i);
-                tlbwi();
-        }
-        
+
+        tlb_invalidate_all();
+                
         /*
          * The kernel is going to make use of some wired
@@ -410 +399 @@
         for (i = 0; i < TLB_ENTRY_COUNT; i++) {
                 cp0_index_write(i);
-
                 tlbr();
                 
@@ -423 +411 @@
         }
 }
+
+/** Invalidate all TLB entries. */
+void tlb_invalidate_all(void)
+{
+        int i;
+
+        cp0_entry_hi_write(0);
+        cp0_entry_lo0_write(0);
+        cp0_entry_lo1_write(0);
+
+        for (i = 0; i < TLB_ENTRY_COUNT; i++) {
+                cp0_index_write(i);
+                tlbwi();
+        }
+}
+
+/** Invalidate all TLB entries belonging to specified address space.
+ *
+ * @param asid Address space identifier.
+ */
+void tlb_invalidate_asid(asid_t asid)
+{
+        entry_hi_t hi;
+        int i;
+
+        for (i = 0; i < TLB_ENTRY_COUNT; i++) {
+                cp0_index_write(i);
+                tlbr();
+                
+                if (hi.asid == asid) {
+                        cp0_entry_lo0_write(0);
+                        cp0_entry_lo1_write(0);
+                        tlbwi();
+                }
+        }
+
+}
+
+/** Invalidate TLB entry for specified page belonging to specified address space.
+ *
+ * @param asid Address space identifier.
+ * @param page Page whose TLB entry is to be invalidated.
+ */
+void tlb_invalidate_page(asid_t asid, __address page)
+{
+        entry_hi_t hi;
+        tlb_index_t index;
+        int i;
+
+        hi.value = 0;
+        prepare_entry_hi(&hi, asid, page);
+        
+        tlbp();
+        index.value = cp0_index_read();
+
+        if (!index.p) {
+                /* Entry was found, index register contains valid index. */
+                cp0_entry_lo0_write(0);
+                cp0_entry_lo1_write(0);
+                tlbwi();
+        }
+}