SLICC: Remove the keyword wake_up_dependents

In order to add stall and wait facility for protocols, a keyword
wake_up_dependents was introduced. This patch removes the keyword,
instead this functionality is now implemented as function call.

src/mem/protocol/MOESI_CMP_token-L1cache.sm

@@ -177,6 +177,7 @@ machine(L1Cache, "Token protocol")
   void set_tbe(TBE b);
   void unset_tbe();
   void wakeUpAllBuffers();
+  void wakeUpBuffers(Address a);
 
   TBETable L1_TBEs, template_hack="<L1Cache_TBE>";
 
@@ -1522,7 +1523,7 @@ machine(L1Cache, "Token protocol")
   }
 
   action(kd_wakeUpDependents, "kd", desc="wake-up dependents") {
-    wake_up_dependents(address);
+    wakeUpBuffers(address);
   }
 
   action(ka_wakeUpAllDependents, "ka", desc="wake-up all dependents") {

src/mem/protocol/MOESI_hammer-cache.sm

@@ -159,6 +159,7 @@ machine(L1Cache, "AMD Hammer-like protocol")
   void set_tbe(TBE b);
   void unset_tbe();
   void wakeUpAllBuffers();
+  void wakeUpBuffers(Address a);
 
   Entry getCacheEntry(Address address), return_by_pointer="yes" {
     Entry L2cache_entry := static_cast(Entry, "pointer", L2cacheMemory.lookup(address));
@@ -1013,7 +1014,7 @@ machine(L1Cache, "AMD Hammer-like protocol")
   }
 
   action(kd_wakeUpDependents, "kd", desc="wake-up dependents") {
-    wake_up_dependents(address);
+    wakeUpBuffers(address);
   }
 
   action(ka_wakeUpAllDependents, "ka", desc="wake-up all dependents") {

src/mem/protocol/MOESI_hammer-dir.sm

@@ -173,6 +173,7 @@ machine(Directory, "AMD Hammer-like protocol")
   void unset_cache_entry();
   void set_tbe(TBE a);
   void unset_tbe();
+  void wakeUpBuffers(Address a);
 
   // ** OBJECTS **
 
@@ -1013,7 +1014,7 @@ machine(Directory, "AMD Hammer-like protocol")
   }
 
   action(k_wakeUpDependents, "k", desc="wake-up dependents") {
-    wake_up_dependents(address);
+    wakeUpBuffers(address);
   }
 
   action(l_popMemQueue, "q", desc="Pop off-chip request queue") {

src/mem/slicc/ast/WakeUpDependentsStatementAST.py

@@ -1,46 +0,0 @@
-# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
-# Copyright (c) 2009 The Hewlett-Packard Development Company
-# Copyright (c) 2010 Advanced Micro Devices, Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met: redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer;
-# redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in the
-# documentation and/or other materials provided with the distribution;
-# neither the name of the copyright holders nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-from slicc.ast.StatementAST import StatementAST
-
-class WakeUpDependentsStatementAST(StatementAST):
-    def __init__(self, slicc, address):
-        super(StatementAST, self).__init__(slicc)
-        self.address = address
-        
-    def __repr__(self):
-        return "[WakeUpDependentsStatementAst: %r]" % self.variable
-
-    def generate(self, code, return_type):
-        self.address.assertType("Address")
-        address_code = self.address.var.code
-        code('''
-        if (m_waiting_buffers.count($address_code) > 0) {
-            wakeUpBuffers($address_code);
-        }
-        ''')

src/mem/slicc/parser.py

@@ -159,7 +159,6 @@ class SLICC(Grammar):
         'state_declaration' : 'STATE_DECL',
         'peek' : 'PEEK',
         'stall_and_wait' : 'STALL_AND_WAIT',
-        'wake_up_dependents' : 'WAKE_UP_DEPENDENTS',
         'enqueue' : 'ENQUEUE',
         'copy_head' : 'COPY_HEAD',
         'check_allocate' : 'CHECK_ALLOCATE',
@@ -577,10 +576,6 @@ class SLICC(Grammar):
         "statement : STALL_AND_WAIT '(' var ',' var ')' SEMI"
         p[0] = ast.StallAndWaitStatementAST(self, p[3], p[5])
 
-    def p_statement__wake_up_dependents(self, p):
-        "statement : WAKE_UP_DEPENDENTS '(' var ')' SEMI"
-        p[0] = ast.WakeUpDependentsStatementAST(self, p[3])
-
     def p_statement__peek(self, p):
         "statement : PEEK '(' var ',' type pairs ')' statements"
         p[0] = ast.PeekStatementAST(self, p[3], p[5], p[6], p[8], "peek")

src/mem/slicc/symbols/StateMachine.py

@@ -721,19 +721,21 @@ $c_ident::stallBuffer(MessageBuffer* buf, Address addr)
 void
 $c_ident::wakeUpBuffers(Address addr)
 {
-    //
-    // Wake up all possible lower rank (i.e. lower priority) buffers that could
-    // be waiting on this message.
-    // 
-    for (int in_port_rank = m_cur_in_port_rank - 1;
-         in_port_rank >= 0;
-         in_port_rank--) {
-        if ((*(m_waiting_buffers[addr]))[in_port_rank] != NULL) {
-            (*(m_waiting_buffers[addr]))[in_port_rank]->reanalyzeMessages(addr);
+    if (m_waiting_buffers.count(addr) > 0) {
+        //
+        // Wake up all possible lower rank (i.e. lower priority) buffers that could
+        // be waiting on this message.
+        //
+        for (int in_port_rank = m_cur_in_port_rank - 1;
+             in_port_rank >= 0;
+             in_port_rank--) {
+            if ((*(m_waiting_buffers[addr]))[in_port_rank] != NULL) {
+                (*(m_waiting_buffers[addr]))[in_port_rank]->reanalyzeMessages(addr);
+            }
         }
+        delete m_waiting_buffers[addr];
+        m_waiting_buffers.erase(addr);
     }
-    delete m_waiting_buffers[addr];
-    m_waiting_buffers.erase(addr);
 }
 
 void