Changeset 687246b in mainline

Timestamp:

2009-05-17T19:04:21Z (15 years ago)

Author:

Pavel Rimsky <rimskyp@…>

Branches:

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

Children:

c5747fe

Parents:

acf37bc

Message:

TLB demap optimalization for US3.

File:

• kernel/arch/sparc64/src/mm/tlb.c (modified) (3 diffs)

kernel/arch/sparc64/src/mm/tlb.c

@@ -498 +498 @@
 }
 
-#if defined (US3)
-/** Invalidates given TLB entry if and only if it is non-locked or global.
- * 
- * @param tlb           TLB number (one of TLB_DSMALL, TLB_DBIG_0, TLB_DBIG_1,
- *                      TLB_ISMALL, TLB_IBIG).
- * @param entry         Entry index within the given TLB.
- */
-static void tlb_invalidate_entry(int tlb, index_t entry)
-{
-        tlb_data_t d;
-        tlb_tag_read_reg_t t;
-        
-        if (tlb == TLB_DSMALL || tlb == TLB_DBIG_0 || tlb == TLB_DBIG_1) {
-                d.value = dtlb_data_access_read(tlb, entry);
-                if (!d.l || d.g) {
-                        t.value = dtlb_tag_read_read(tlb, entry);
-                        d.v = false;
-                        dtlb_tag_access_write(t.value);
-                        dtlb_data_access_write(tlb, entry, d.value);
-                }
-        } else if (tlb == TLB_ISMALL || tlb == TLB_IBIG) {
-                d.value = itlb_data_access_read(tlb, entry);
-                if (!d.l || d.g) {
-                        t.value = itlb_tag_read_read(tlb, entry);
-                        d.v = false;
-                        itlb_tag_access_write(t.value);
-                        itlb_data_access_write(tlb, entry, d.value);
-                }
-        }
-}
-#endif
-
+#if defined (US)
 /** Invalidate all unlocked ITLB and DTLB entries. */
 void tlb_invalidate_all(void)
@@ -544 +513 @@
          */
 
-#if defined (US)
         tlb_data_t d;
         tlb_tag_read_reg_t t;
@@ -568 +536 @@
         }
 
+}
+
 #elif defined (US3)
 
-        for (i = 0; i < tlb_ismall_size(); i++)
-                tlb_invalidate_entry(TLB_ISMALL, i);
-        for (i = 0; i < tlb_ibig_size(); i++)
-                tlb_invalidate_entry(TLB_IBIG, i);
-        for (i = 0; i < tlb_dsmall_size(); i++)
-                tlb_invalidate_entry(TLB_DSMALL, i);
-        for (i = 0; i < tlb_dbig_size(); i++)
-                tlb_invalidate_entry(TLB_DBIG_0, i);
-        for (i = 0; i < tlb_dbig_size(); i++)
-                tlb_invalidate_entry(TLB_DBIG_1, i);
+/** Invalidate all unlocked ITLB and DTLB entries. */
+void tlb_invalidate_all(void)
+{
+        itlb_demap(TLB_DEMAP_ALL, 0, 0);
+        dtlb_demap(TLB_DEMAP_ALL, 0, 0);
+}
+
 #endif
-
-}
 
 /** Invalidate all ITLB and DTLB entries that belong to specified ASID