Changeset 487 for trunk/modules/vci_cc_vcache_wrapper/caba/source/include

Timestamp:

Aug 8, 2013, 1:33:39 PM (11 years ago)

Author:

haoliu

Message:

Bug fixed in vci_cc_vcache_wrapper component:
1) The r_dcache_paddr_ext is utiliszed in the state DCACHE_XTN_DC_INVAL_VA(DCACHE FSM)
for constructing the physical address when the tlb is not activated.

2) In the ICACHE FSM and DCACHE FSM, the state MISS_SELECT will not be blocked by the
r_icache_cc_send_req (r_dcache_cc_send_req for DCACHE FSM) when a victim solt is found,
because we should assure that the cache L1 can consume the response of the miss read
request when the response has arrived.
(The reason of this condtion comes from a deadlock detected in the above version)

A new filp-flop is utilized in the ICACHE FSM (same in DCACHE FSM) for saving the cleanup victim
request when the r_icache_cc_send_req is true. This saving request will be sent later
in the states MISS_WAIT or MISS_UPDT_DIR when r_icache_cc_send_req is false.

File:

• trunk/modules/vci_cc_vcache_wrapper/caba/source/include/vci_cc_vcache_wrapper.h (modified) (3 diffs)

trunk/modules/vci_cc_vcache_wrapper/caba/source/include/vci_cc_vcache_wrapper.h

@@ -175 +175 @@
         CC_RECEIVE_INS_UPDT_HEADER,
         CC_RECEIVE_INS_UPDT_NLINE,
-        CC_RECEIVE_INS_UPDT_DATA,
         CC_RECEIVE_DATA_INVAL_HEADER,
         CC_RECEIVE_DATA_INVAL_NLINE,
         CC_RECEIVE_DATA_UPDT_HEADER,
         CC_RECEIVE_DATA_UPDT_NLINE,
+        CC_RECEIVE_INS_UPDT_DATA,
         CC_RECEIVE_DATA_UPDT_DATA,
     };
@@ -388 +388 @@
     sc_signal<bool>         r_icache_tlb_rsp_error;      // tlb miss response error
 
+    // Filp-Flop in ICACHE FSM for saving the cleanup victim request
+    sc_signal<bool>         r_icache_cleanup_victim_req; 
+    sc_signal<paddr_t>      r_icache_cleanup_victim_nline;
+
     // communication between ICACHE FSM and CC_SEND FSM
     sc_signal<bool>         r_icache_cc_send_req;           // ICACHE cc_send request
@@ -480 +484 @@
     sc_signal<bool>         r_dcache_xtn_req;           // xtn request (caused by processor)
     sc_signal<int>          r_dcache_xtn_opcode;        // xtn request type
+
+    // Filp-Flop in DCACHE FSM for saving the cleanup victim request
+    sc_signal<bool>         r_dcache_cleanup_victim_req; 
+    sc_signal<paddr_t>      r_dcache_cleanup_victim_nline;
 
     // communication between DCACHE FSM and CC_SEND FSM