Changeset 289

Timestamp:

Jan 20, 2013, 7:09:37 PM (11 years ago)

Author:

cfuguet

Message:

Introducing cache data ram with bit masking in the Memory Cache.
The goal of this modifications is the alignment of the SOCLIB model
against the VHDL one.

Due to this new property in the Cache Data of the Memory Cache,
the FSM's of this component do not need to read and then write when
doing a not full word write operation.

Location:

trunk/modules/vci_mem_cache_v4/caba/source

Files:

• include/mem_cache_directory_v4.h (modified) (1 diff)
• include/vci_mem_cache_v4.h (modified) (1 diff)
• src/vci_mem_cache_v4.cpp (modified) (23 diffs)

trunk/modules/vci_mem_cache_v4/caba/source/include/mem_cache_directory_v4.h

@@ -620 +620 @@
   }; // end class HeapDirectory
 
+  ////////////////////////////////////////////////////////////////////////
+  //                        Cache Data 
+  ////////////////////////////////////////////////////////////////////////
+  class CacheData {
+    private:
+      const uint32_t m_sets;
+      const uint32_t m_ways;
+      const uint32_t m_words;
+
+      uint32_t *** m_cache_data;
+
+    public:
+
+      CacheData(uint32_t ways, uint32_t sets, uint32_t words)
+        : m_sets(sets), m_ways(ways), m_words(words) {
+
+          m_cache_data = new uint32_t ** [ways];
+          for ( size_t i=0 ; i < ways ; i++ ) {
+            m_cache_data[i] = new uint32_t * [sets];
+          }
+          for ( size_t i=0; i<ways; i++ ) {
+            for ( size_t j=0; j<sets; j++ ) {
+              m_cache_data[i][j] = new uint32_t [words];
+            }
+          }
+        }
+
+      ~CacheData() {
+          for(size_t i=0; i<m_ways ; i++){
+              for(size_t j=0; j<m_sets ; j++){
+                  delete [] m_cache_data[i][j];
+              }
+          }
+          for(size_t i=0; i<m_ways ; i++){
+              delete [] m_cache_data[i];
+          }
+          delete [] m_cache_data;
+      }
+
+      uint32_t read (
+          const uint32_t &way,
+          const uint32_t &set,
+          const uint32_t &word) const {
+
+        assert((set  < m_sets ) && "Cache data error: Trying to read a wrong set" );
+        assert((way  < m_ways ) && "Cache data error: Trying to read a wrong way" );
+        assert((word < m_words) && "Cache data error: Trying to read a wrong word");
+
+        return m_cache_data[way][set][word];
+      }
+
+      void read_line(
+          const uint32_t &way,
+          const uint32_t &set,
+          sc_core::sc_signal<uint32_t> * cache_line)
+      {
+        assert((set < m_sets ) && "Cache data error: Trying to read a wrong set" );
+        assert((way < m_ways ) && "Cache data error: Trying to read a wrong way" );
+      
+        for (uint32_t word=0; word<m_words; word++)
+          cache_line[word].write(m_cache_data[way][set][word]);
+      }
+
+      void write (
+          const uint32_t &way,
+          const uint32_t &set,
+          const uint32_t &word,
+          const uint32_t &data,
+          const uint32_t &be = 0xF) {
+
+        assert((set  < m_sets ) && "Cache data error: Trying to write a wrong set" );
+        assert((way  < m_ways ) && "Cache data error: Trying to write a wrong way" );
+        assert((word < m_words) && "Cache data error: Trying to write a wrong word");
+        assert((be  <= 0xF    ) && "Cache data error: Trying to write a wrong word cell");
+
+        if (be == 0x0) return;
+
+        if (be == 0xF) {
+            m_cache_data[way][set][word] = data; 
+            return;
+        }
+
+        uint32_t mask = 0;
+        if  (be & 0x1) mask = mask | 0x000000FF;
+        if  (be & 0x2) mask = mask | 0x0000FF00;
+        if  (be & 0x4) mask = mask | 0x00FF0000;
+        if  (be & 0x8) mask = mask | 0xFF000000;
+
+        m_cache_data[way][set][word] = 
+          (data & mask) | (m_cache_data[way][set][word] & ~mask);
+      }
+  }; // end class CacheData
 
 }} // end namespaces

trunk/modules/vci_mem_cache_v4/caba/source/include/vci_mem_cache_v4.h

@@ -420 +420 @@
       UpdateTab       m_update_tab;       // pending update & invalidate
       CacheDirectory  m_cache_directory;  // data cache directory
+      CacheData       m_cache_data;       // data array[set][way][word]
       HeapDirectory   m_heap;             // heap for copies
-
-      data_t      *** m_cache_data;       // data array[set][way][word]
 
       // adress masks

trunk/modules/vci_mem_cache_v4/caba/source/src/vci_mem_cache_v4.cpp

@@ -276 +276 @@
     p_vci_ixr("vci_ixr"),
 
+    m_seglist(mtp.getSegmentList(vci_tgt_index)),
+    m_cseglist(mtc.getSegmentList(vci_tgt_index_cleanup)),
+
     m_initiators( 1 << vci_param::S ),
     m_heap_size( heap_size ),
@@ -283 +286 @@
     m_srcid_ixr( mtx.indexForId(vci_ixr_index) ),
     m_srcid_ini( mtc.indexForId(vci_ini_index) ),
-    m_seglist(mtp.getSegmentList(vci_tgt_index)),
-    m_cseglist(mtc.getSegmentList(vci_tgt_index_cleanup)),
     m_transaction_tab_lines(transaction_tab_lines),
     m_transaction_tab( transaction_tab_lines, nwords ),
@@ -290 +291 @@
     m_update_tab( update_tab_lines ),
     m_cache_directory( nways, nsets, nwords, vci_param::N ),
+    m_cache_data( nways, nsets, nwords ),
     m_heap( m_heap_size ),
 
@@ -409 +411 @@
           m_cseg[i] = &(*seg);
           i++;
-      }
-
-      // Memory cache allocation & initialisation
-      m_cache_data = new data_t**[nways];
-      for ( size_t i=0 ; i<nways ; ++i ) {
-        m_cache_data[i] = new data_t*[nsets];
-      }
-      for ( size_t i=0; i<nways; ++i ) {
-        for ( size_t j=0; j<nsets; ++j ) {
-          m_cache_data[i][j] = new data_t[nwords];
-          for ( size_t k=0; k<nwords; k++){
-            m_cache_data[i][j][k]=0;
-          }
-        }
       }
 
@@ -558 +546 @@
     /////////////////////////////////
   {
-    for(size_t i=0; i<m_ways ; i++){
-      for(size_t j=0; j<m_sets ; j++){
-        delete [] m_cache_data[i][j];
-      }
-    }
-    for(size_t i=0; i<m_ways ; i++){
-      delete [] m_cache_data[i];
-    }
-    delete [] m_cache_data;
-
     delete [] r_ixr_rsp_to_xram_rsp_rok;
 
@@ -1318 +1296 @@
         size_t set        = m_y[(vci_addr_t)(m_cmd_read_addr_fifo.read())];
         size_t way        = r_read_way.read();
-        for ( size_t i=0 ; i<m_words ; i++ ) r_read_data[i] = m_cache_data[way][set][i];
+
+        m_cache_data.read_line(way, set, r_read_data);
 
         // update the cache directory
@@ -1412 +1391 @@
         size_t set = m_y[(vci_addr_t)(m_cmd_read_addr_fifo.read())];
         size_t way = r_read_way.read();
-        for ( size_t i=0 ; i<m_words ; i++ ) r_read_data[i] = m_cache_data[way][set][i];
+
+        m_cache_data.read_line(way, set, r_read_data);
 
         // update the cache directory
@@ -1789 +1769 @@
 
         // initialize the be field for all words
-        for ( size_t i=0 ; i<m_words ; i++ )
-        {
-          if ( i == index ) r_write_be[i] = m_cmd_write_be_fifo.read();
-          else              r_write_be[i] = 0x0;
-        }
-
-        if( !((m_cmd_write_be_fifo.read() == 0x0)||(m_cmd_write_be_fifo.read() == 0xF)) )
-          r_write_byte = true;
-        else
-          r_write_byte = false;
+        for ( size_t word=0 ; word<m_words ; word++ )
+        {
+          if ( word == index ) r_write_be[word] = m_cmd_write_be_fifo.read();
+          else                 r_write_be[word] = 0x0;
+        }
 
         if( m_cmd_write_eop_fifo.read() )
@@ -1854 +1829 @@
         r_write_data[index] = m_cmd_write_data_fifo.read();
         r_write_word_count  = r_write_word_count.read() + 1;
-
-        if( !((m_cmd_write_be_fifo.read() == 0x0)||(m_cmd_write_be_fifo.read() == 0xF)) )
-          r_write_byte = true;
 
         if ( m_cmd_write_eop_fifo.read() )
@@ -1917 +1889 @@
           else
           {
-            if (r_write_byte.read())
-            {
-              r_write_fsm = WRITE_DIR_READ;
-            }
-            else
-            {
-              r_write_fsm = WRITE_DIR_HIT;
-            }
+            r_write_fsm = WRITE_DIR_HIT;
           }
         }
@@ -1961 +1926 @@
       size_t set  = m_y[(vci_addr_t)(r_write_address.read())];
       size_t way  = r_write_way.read();
-      for(size_t i=0 ; i<m_words ; i++)
+      for(size_t word=0 ; word<m_words ; word++)
       {
         data_t mask = 0;
-        if  (r_write_be[i].read() & 0x1) mask = mask | 0x000000FF;
-        if  (r_write_be[i].read() & 0x2) mask = mask | 0x0000FF00;
-        if  (r_write_be[i].read() & 0x4) mask = mask | 0x00FF0000;
-        if  (r_write_be[i].read() & 0x8) mask = mask | 0xFF000000;
+        if  (r_write_be[word].read() & 0x1) mask = mask | 0x000000FF;
+        if  (r_write_be[word].read() & 0x2) mask = mask | 0x0000FF00;
+        if  (r_write_be[word].read() & 0x4) mask = mask | 0x00FF0000;
+        if  (r_write_be[word].read() & 0x8) mask = mask | 0xFF000000;
 
         // complete only if mask is not null (for energy consumption)
-        if ( r_write_be[i].read() || r_write_is_cnt.read() )
-        {
-          r_write_data[i]  = (r_write_data[i].read() & mask) |
-            (m_cache_data[way][set][i] & ~mask);
-        }
+        r_write_data[word]  = (r_write_data[word].read() & mask) |
+          (m_cache_data.read(way, set, word) & ~mask);
+
       } // end for
 
       // test if a coherence broadcast is required
-      if( r_write_is_cnt.read() && r_write_count.read() )
-      {
-        r_write_fsm = WRITE_BC_TRT_LOCK;
-      }
-      else
-      {
-        r_write_fsm = WRITE_DIR_HIT;
-      }
+      r_write_fsm = WRITE_BC_TRT_LOCK;
 
 #if DEBUG_MEMC_WRITE
@@ -2034 +1990 @@
       if( no_update )
       {
-        for(size_t i=0 ; i<m_words ; i++)
-        {
-          if  ( r_write_be[i].read() )
+        for(size_t word=0 ; word<m_words ; word++)
+        {
+          m_cache_data.write(way, set, word, r_write_data[word].read(), r_write_be[word].read());
+
+          if ( m_monitor_ok )
           {
-            m_cache_data[way][set][i]  = r_write_data[i].read();
-
-            if ( m_monitor_ok )
-            {
-              vci_addr_t address = (r_write_address.read() & ~(vci_addr_t)0x3F) | i<<2;
-              char buf[80];
-              snprintf(buf, 80, "WRITE_DIR_HIT srcid %d", r_write_srcid.read());
-              check_monitor( buf, address, r_write_data[i].read() );
-            }
+            vci_addr_t address = (r_write_address.read() & ~(vci_addr_t)0x3F) | word<<2;
+            char buf[80];
+            snprintf(buf, 80, "WRITE_DIR_HIT srcid %d", r_write_srcid.read());
+            check_monitor( buf, address, r_write_data[word].read() );
           }
         }
@@ -2122 +2075 @@
         if ( wok )    // write data in cache
         {
-          for(size_t i=0 ; i<m_words ; i++)
+          for(size_t word=0 ; word<m_words ; word++)
           {
-            if ( r_write_be[i].read() )
-            {
-              m_cache_data[way][set][i] = r_write_data[i].read();
-
-              if ( m_monitor_ok )
-              {
-                vci_addr_t address = (r_write_address.read() & ~(vci_addr_t)0x3F) | i<<2;
-                char buf[80];
-                snprintf(buf, 80, "WRITE_UPT_LOCK srcid %d", srcid);
-                check_monitor(buf, address, r_write_data[i].read() );
-              }
+            m_cache_data.write(way, set, word, r_write_data[word].read(), r_write_be[word].read());
+
+            if ( m_monitor_ok )
+            {
+              vci_addr_t address = (r_write_address.read() & ~(vci_addr_t)0x3F) | word<<2;
+              char buf[80];
+              snprintf(buf, 80, "WRITE_UPT_LOCK srcid %d", srcid);
+              check_monitor(buf, address, r_write_data[word].read() );
             }
           }
@@ -2373 +2323 @@
 
           // initialize the be field for all words
-          for ( size_t i=0 ; i<m_words ; i++ )
+          for ( size_t word=0 ; word<m_words ; word++ )
           {
-            if ( i == index ) r_write_be[i] = m_cmd_write_be_fifo.read();
-            else              r_write_be[i] = 0x0;
+            if ( word == index ) r_write_be[word] = m_cmd_write_be_fifo.read();
+            else                 r_write_be[word] = 0x0;
           }
-
-          if( !((m_cmd_write_be_fifo.read() == 0x0)||(m_cmd_write_be_fifo.read() == 0xF)) )
-            r_write_byte = true;
-          else
-            r_write_byte = false;
 
           if( m_cmd_write_eop_fifo.read() )
@@ -2428 +2373 @@
         }
 #endif
-        size_t    hit_index = 0;
-        size_t    wok_index = 0;
-        vci_addr_t  addr      = (vci_addr_t)r_write_address.read();
+        size_t  hit_index = 0;
+        size_t  wok_index = 0;
+        vci_addr_t  addr  = (vci_addr_t)r_write_address.read();
         bool    hit_read  = m_transaction_tab.hit_read(m_nline[addr], hit_index);
         bool    hit_write = m_transaction_tab.hit_write(m_nline[addr]);
@@ -3112 +3057 @@
 
                 // copy the victim line in a local buffer
-                for (size_t i=0 ; i<m_words ; i++)
-                  r_xram_rsp_victim_data[i] = m_cache_data[way][set][i];
+                m_cache_data.read_line(way, set, r_xram_rsp_victim_data);
 
                 r_xram_rsp_victim_copy      = victim.owner.srcid;
@@ -3228 +3172 @@
             size_t set   = r_xram_rsp_victim_set.read();
             size_t way   = r_xram_rsp_victim_way.read();
-            for(size_t i=0; i<m_words ; i++)
-            {
-                m_cache_data[way][set][i] = r_xram_rsp_trt_buf.wdata[i];
+            for(size_t word=0; word<m_words ; word++)
+            {
+                m_cache_data.write(way, set, word, r_xram_rsp_trt_buf.wdata[word]);
 
                 if ( m_monitor_ok )
                 {
-                    vci_addr_t address = r_xram_rsp_trt_buf.nline<<6 | i<<2;
-                    check_monitor("XRAM_RSP_DIR_UPDT", address, r_xram_rsp_trt_buf.wdata[i]);
+                    vci_addr_t address = r_xram_rsp_trt_buf.nline<<6 | word<<2;
+                    check_monitor("XRAM_RSP_DIR_UPDT", address, r_xram_rsp_trt_buf.wdata[word]);
                 }
             }
@@ -4413 +4357 @@
 
             // read data in cache & check data change
-            bool ok = ( r_cas_rdata[0].read() == m_cache_data[way][set][word] );
+            bool ok = ( r_cas_rdata[0].read() == m_cache_data.read(way, set, word) );
             if ( r_cas_cpt.read()==4 )  // 64 bits CAS
-                ok &= ( r_cas_rdata[1] == m_cache_data[way][set][word+1] );
+                ok &= ( r_cas_rdata[1] == m_cache_data.read(way, set, word+1));
 
             // to avoid livelock, force the atomic access to fail pseudo-randomly
@@ -4435 +4379 @@
     std::cout << "  <MEMC " << name() << ".CAS_DIR_HIT_READ> Test if CAS success:"
               << " / expected value = " << r_cas_rdata[0].read()
-              << " / actual value = " << m_cache_data[way][set][word]
+              << " / actual value = " << m_cache_data.read(way, set, word)
               << " / forced_fail = " << forced_fail << std::endl;
 }
@@ -4469 +4413 @@
 
                 // cache update
-                m_cache_data[way][set][word] = r_cas_wdata.read();
+                m_cache_data.write(way, set, word, r_cas_wdata.read());
                 if(r_cas_cpt.read()==4)
-                    m_cache_data[way][set][word+1] = m_cmd_cas_wdata_fifo.read();
+                    m_cache_data.write(way, set, word+1, m_cmd_cas_wdata_fifo.read());
 
                 // monitor
@@ -4530 +4474 @@
                     size_t word = m_x[(vci_addr_t)(m_cmd_cas_addr_fifo.read())];
 
-                    m_cache_data[way][set][word] = r_cas_wdata.read();
+                    m_cache_data.write(way, set, word, r_cas_wdata.read());
                     if(r_cas_cpt.read()==4)
-                        m_cache_data[way][set][word+1] = m_cmd_cas_wdata_fifo.read();
+                        m_cache_data.write(way, set, word+1, m_cmd_cas_wdata_fifo.read());
 
                     // monitor
@@ -4714 +4658 @@
                         else
                         {
-                            r_cas_to_ixr_cmd_data[i] = m_cache_data[way][set][i];
+                            r_cas_to_ixr_cmd_data[i] = m_cache_data.read(way, set, i);
                         }
                     }
@@ -4768 +4712 @@
                     size_t word = m_x[(vci_addr_t)(m_cmd_cas_addr_fifo.read())];
 
-                    m_cache_data[way][set][word] = r_cas_wdata.read();
+                    m_cache_data.write(way, set, word, r_cas_wdata.read());
                     if(r_cas_cpt.read()==4)
-                        m_cache_data[way][set][word+1] = m_cmd_cas_wdata_fifo.read();
+                        m_cache_data.write(way, set, word+1, m_cmd_cas_wdata_fifo.read());
 
                     // monitor