Clean up some of vincent's code and commit it

Makes page table cache scheme actually work

src/mem/page_table.cc:
src/mem/page_table.hh:
    fix caching scheme to actually work and improve performance

--HG--
extra : convert_revision : 443a8d8acbee540b26affcfdfbf107b8e735d1bd

1 files changed, 16 insertions, 0 deletions

diff --git a/src/mem/page_table.hh b/src/mem/page_table.hh
index 0e2b1f58c..64c824238 100644
--- a/src/mem/page_table.hh
+++ b/src/mem/page_table.hh
@@ -95,6 +95,22 @@ class PageTable
      */
     Fault translate(RequestPtr &req);
 
+    /**
+     * Update the page table cache.
+     * @param vaddr virtual address (page aligned) to check
+     * @param paddr physical address (page aligned) to return
+     */
+    inline void updateCache(Addr vaddr, Addr paddr)
+    {
+        pTableCache[2].paddr = pTableCache[1].paddr;
+        pTableCache[2].vaddr = pTableCache[1].vaddr;
+        pTableCache[1].paddr = pTableCache[0].paddr;
+        pTableCache[1].vaddr = pTableCache[0].vaddr;
+        pTableCache[0].paddr = paddr;
+        pTableCache[0].vaddr = vaddr;
+    }
+
+
     void serialize(std::ostream &os);
     void unserialize(Checkpoint *cp, const std::string &section);
 };