ruby: Stall and wait input messages instead of recycling

This patch allows messages to be stalled in their input buffers and wait
until a corresponding address changes state.  In order to make this work,
all in_ports must be ranked in order of dependence and those in_ports that
may unblock an address, must wake up the stalled messages.  Alot of this
complexity is handled in slicc and the specification files simply
annotate the in_ports.

--HG--
rename : src/mem/slicc/ast/CheckAllocateStatementAST.py => src/mem/slicc/ast/StallAndWaitStatementAST.py
rename : src/mem/slicc/ast/CheckAllocateStatementAST.py => src/mem/slicc/ast/WakeUpDependentsStatementAST.py

1 files changed, 8 insertions, 0 deletions

diff --git a/src/mem/slicc/ast/PeekStatementAST.py b/src/mem/slicc/ast/PeekStatementAST.py
index 18244f507..cc3091c8a 100644
--- a/src/mem/slicc/ast/PeekStatementAST.py
+++ b/src/mem/slicc/ast/PeekStatementAST.py
@@ -77,6 +77,14 @@ class PeekStatementAST(StatementAST):
     }
             ''')
 
+        if self.pairs.has_key("wake_up"):
+            address_field = self.pairs['wake_up']
+            code('''
+    if (m_waiting_buffers.count(in_msg_ptr->m_$address_field) > 0) {
+        wakeUpBuffers(in_msg_ptr->m_$address_field);
+    }
+            ''')
+
         # The other statements
         self.statements.generate(code, return_type)
         self.symtab.popFrame()