Changeset 604 for branches/RWT/communication

Timestamp:

Dec 17, 2013, 3:21:07 PM (11 years ago)

Author:

devigne

Message:

Merge with the latest trunk (concurrent access to a register CONFIG_FSM)
Modification processing software invalidations to memcache level.

When a software memcache invalidation, it does not write the dirty data in the
XRAM (and therefore does not reserve space in the TRT). This poses a problem
when processing CLEANUP_DATA on a line NCC because CLEANUP_FSM expects to find
a placeholder in the TRT.

To overcome this problem, the flit DSPIN a multi-inval now contains a bit to
indicate that the invalidation from a control configuration (software
invalidation level memcache).

At the reception of this message invalidation in the L1 cache, it retrieves the
value of the field DSPIN IS_CONFIG. When processing invalidation (
DCACHE_CC_INVAL ), the value of this field is checked. Two scenarios are
possible:

• 1st case : The INVAL concerns a line NCC but not from a software invalidation (IS_CONFIG = 0), the CLEANUP sent then follows the classical treatment of invalidation of a line NCC (sends a CLEANUP_NCC with or without data).

• 2nd case : The INVAL provides a line NCC from a software invalidation (IS_CONFIG = 1) : same treatment as was CLEANUP line CC.

Thus in the case of interest (software invalidation on a line NCC), the CLEANUP
received by the memcache will be treated as one line CC.

File:

• branches/RWT/communication/dspin_dhccp_param/caba/source/include/dspin_dhccp_param.h (modified) (6 diffs)

branches/RWT/communication/dspin_dhccp_param/caba/source/include/dspin_dhccp_param.h

@@ -94 +94 @@
  *
  * flit 1
- * ----------------------------------------------------------------------------------------------
- * EOP:0 | DEST(14 bits) | X(4 bits) | MEMC_ID(14 bits) | UPDT_INDEX(4 bits) | TYPE:0b1X  | BC:0
- * ----------------------------------------------------------------------------------------------
- *                                                                           | X: 0 DATA  |
- *                                                                           |    1 INST  |
+ * ------------------------------------------------------------------------------------------------------------------
+ * EOP:0 | DEST(14 bits) | X (3 bits) | IS_CONFIG (1 bit) | MEMC_ID(14 bits) | UPDT_INDEX(4 bits) | TYPE:0b1X  | BC:0
+ * ------------------------------------------------------------------------------------------------------------------
+ *                                                                                                | X: 0 DATA  |
+ *                                                                                                |    1 INST  |
  * flit 2
  * ----------------------------------------------------------------------------------------------
@@ -182 +182 @@
     static const uint8_t  CLEANUP_DATA_UPDT_SHIFT      = 0;
     static const uint64_t CLEANUP_DATA_UPDT_MASK       = ((1ULL<<32)-1);
-    static const uint8_t  CLEANUP_NCC_SHIFT  = 5;
-    static const uint64_t CLEANUP_NCC_MASK   = 1;
+    static const uint8_t  CLEANUP_NCC_SHIFT            = 5;
+    static const uint64_t CLEANUP_NCC_MASK             = 1;
 
     static const uint8_t  MULTI_ACK_DEST_SHIFT         = CLEANUP_DEST_SHIFT;
@@ -205 +205 @@
     static const uint8_t  MULTI_INVAL_NLINE_SHIFT      = 0;
     static const uint64_t MULTI_INVAL_NLINE_MASK       = ((1ULL<<NLINE_WIDTH)-1);
+    static const uint8_t  MULTI_INVAL_IS_CONFIG_SHIFT  = 21;
+    static const uint64_t MULTI_INVAL_IS_CONFIG_MASK   = 1;
 
     static const uint8_t  MULTI_UPDT_DEST_SHIFT        = MULTI_INVAL_DEST_SHIFT;
@@ -300 +302 @@
       MULTI_INVAL_UPDT_INDEX,
       MULTI_INVAL_NLINE,
+      MULTI_INVAL_IS_CONFIG,
 
       MULTI_UPDT_DEST,
@@ -343 +346 @@
         GET_FIELD(flit,MULTI_INVAL_UPDT_INDEX);
         GET_FIELD(flit,MULTI_INVAL_NLINE);
+        GET_FIELD(flit,MULTI_INVAL_IS_CONFIG);
         GET_FIELD(flit,MULTI_UPDT_DEST);
         GET_FIELD(flit,MULTI_UPDT_SRCID);
@@ -385 +389 @@
         SET_FIELD(flit,value,MULTI_INVAL_UPDT_INDEX);
         SET_FIELD(flit,value,MULTI_INVAL_NLINE);
+        SET_FIELD(flit,value,MULTI_INVAL_IS_CONFIG);
         SET_FIELD(flit,value,MULTI_UPDT_DEST);
         SET_FIELD(flit,value,MULTI_UPDT_SRCID);