Changeset 384 for trunk/modules

Timestamp:

Apr 30, 2013, 4:18:33 PM (12 years ago)

Author:

joannou

Message:

Bugfix in vci_cc_vcache_wrapper :

• Made cache flush states interruptible by coherence request to avoid potential deadlock situations
• Fixed the cc_send_nline values sent for a cleanup in cache flush states by adding the set value
• Also changed DCACHE_DIRTY_PTE_GET to DCACHE_DIRTY_GET_PTE (display purposes only)

File:

• trunk/modules/vci_cc_vcache_wrapper/caba/source/src/vci_cc_vcache_wrapper.cpp (modified) (5 diffs)

trunk/modules/vci_cc_vcache_wrapper/caba/source/src/vci_cc_vcache_wrapper.cpp

@@ -96 +96 @@
         "DCACHE_XTN_DT_INVAL",
 
-        "DCACHE_DIRTY_PTE_GET",
+        "DCACHE_DIRTY_GET_PTE",
         "DCACHE_DIRTY_WAIT",
 
@@ -1230 +1230 @@
                                         // A cleanup request is generated for each valid line
     {
+        // coherence request (from CC_RECEIVE FSM)
+        if ( r_cc_receive_icache_req.read() )
+        {
+            r_icache_fsm = ICACHE_CC_CHECK;
+            r_icache_fsm_save = r_icache_fsm.read();
+            break;
+        }
+
         if ( not r_icache_cc_send_req.read() ) // blocked until previous cc_send request is sent
         {
@@ -1249 +1257 @@
                 // request cleanup
                 r_icache_cc_send_req   = true;
-                r_icache_cc_send_nline = tag * m_icache_sets;
+                r_icache_cc_send_nline = tag * m_icache_sets + set;
                 r_icache_cc_send_way   = way;
                 r_icache_cc_send_type  = CC_TYPE_CLEANUP;
@@ -3541 +3549 @@
                                 // returns to IDLE and flush TLBs when last slot
     {
+        // coherence request (from CC_RECEIVE FSM)
+        if ( r_cc_receive_dcache_req.read() )
+        {
+            r_dcache_fsm = DCACHE_CC_CHECK;
+            r_dcache_fsm_cc_save = r_dcache_fsm.read();
+            break;
+        }
+
         if ( not r_dcache_cc_send_req.read() ) // blocked until previous cc_send request is sent
         {
@@ -3560 +3576 @@
                 // request cleanup
                 r_dcache_cc_send_req   = true;
-                r_dcache_cc_send_nline = tag * m_dcache_sets;
+                r_dcache_cc_send_nline = tag * m_dcache_sets + set;
                 r_dcache_cc_send_way   = way;
                 r_dcache_cc_send_type  = CC_TYPE_CLEANUP;