1 files changed, 110 insertions, 0 deletions
diff --git a/cpu/beta_cpu/comm.hh b/cpu/beta_cpu/comm.hh
new file mode 100644
index 000000000..21a530ecf
--- /dev/null
+++ b/cpu/beta_cpu/comm.hh
@@ -0,0 +1,110 @@
+#ifndef __COMM_HH__
+#define __COMM_HH__
+
+#include <stdint.h>
+#include "arch/alpha/isa_traits.hh"
+#include "cpu/inst_seq.hh"
+
+using namespace std;
+
+// Find better place to put this typedef.
+typedef short int PhysRegIndex;
+
+// Might want to put constructors/destructors here.
+template<class Impl>
+struct SimpleFetchSimpleDecode {
+    // Consider having a field of how many ready instructions.
+    typename Impl::DynInst *insts[1];
+};
+
+template<class Impl>
+struct SimpleDecodeSimpleRename {
+    // Consider having a field of how many ready instructions.
+    typename Impl::DynInst *insts[1];
+};
+
+template<class Impl>
+struct SimpleRenameSimpleIEW {
+    // Consider having a field of how many ready instructions.
+    typename Impl::DynInst *insts[1];
+};
+
+template<class Impl>
+struct SimpleIEWSimpleCommit {
+    // Consider having a field of how many ready instructions.
+    typename Impl::DynInst *insts[1];
+};
+
+template<class Impl>
+struct IssueStruct {
+    typename Impl::DynInst *insts[1];
+};
+
+struct TimeBufStruct {
+    struct decodeComm {
+        bool squash;
+        bool stall;
+        bool predIncorrect;
+        uint64_t branchAddr;
+
+        //Question, is it worthwhile to have this Addr passed along
+        //by each stage, or just have Fetch look it up in the proper
+        //amount of cycles in the time buffer?
+        //Both might actually be needed because decode can send a different
+        //nextPC if the bpred was wrong.
+        uint64_t nextPC;
+    };
+
+    decodeComm decodeInfo;
+
+    // Rename can't actually tell anything to squash or send a new PC back
+    // because it doesn't do anything along those lines.  But maybe leave
+    // these fields in here to keep the stages mostly orthagonal.
+    struct renameComm {
+        bool squash;
+        bool stall;
+
+        uint64_t nextPC;
+    };
+
+    renameComm renameInfo;
+
+    struct iewComm {
+        bool squash;
+        bool stall;
+        bool predIncorrect;
+
+        // Also eventually include skid buffer space.
+        unsigned freeIQEntries;
+
+        uint64_t nextPC;
+        // For now hardcode the type.
+        // Change this to sequence number eventually.
+        InstSeqNum squashedSeqNum;
+    };
+
+    iewComm iewInfo;
+
+    struct commitComm {
+        bool squash;
+        bool stall;
+        unsigned freeROBEntries;
+
+        uint64_t nextPC;
+
+        // Think of better names here.
+        // Will need to be a variety of sizes...
+        // Maybe make it a vector, that way only need one object.
+        vector<PhysRegIndex> freeRegs;
+
+        bool robSquashing;
+        // Represents the instruction that has either been retired or
+        // squashed.  Similar to having a single bus that broadcasts the
+        // retired or squashed sequence number.
+        InstSeqNum doneSeqNum;
+    };
+
+    commitComm commitInfo;
+};
+
+#endif //__COMM_HH__