mem-ruby: RubyRequest getter for request ptr

Change-Id: Ib3d12c9030d18d96388dd66f0a409b42543ee9a8
Signed-off-by: Tiago Mück <tiago.muck@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41814
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/mem/ruby/protocol/RubySlicc_Exports.sm

@@ -50,6 +50,7 @@ external_type(Packet, primitive="yes");
 external_type(Addr, primitive="yes");
 external_type(Cycles, primitive="yes", default="Cycles(0)");
 external_type(Tick, primitive="yes", default="0");
+external_type(RequestPtr, primitive="yes", default="nullptr");
 
 structure(WriteMask, external="yes", desc="...") {
   void clear();

src/mem/ruby/protocol/RubySlicc_Types.sm

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020 ARM Limited
+ * Copyright (c) 2020-2021 ARM Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -170,6 +170,8 @@ structure(RubyRequest, desc="...", interface="Message", external="yes") {
   PacketPtr pkt,             desc="Packet associated with this request";
   bool htmFromTransaction,   desc="Memory request originates within a HTM transaction";
   int htmTransactionUid,     desc="Used to identify the unique HTM transaction that produced this request";
+
+  RequestPtr getRequestPtr();
 }
 
 structure(AbstractCacheEntry, primitive="yes", external = "yes") {

src/mem/ruby/slicc_interface/RubyRequest.hh

@@ -154,6 +154,7 @@ class RubyRequest : public Message
     const RubyAccessMode& getAccessMode() const { return m_AccessMode; }
     const int& getSize() const { return m_Size; }
     const PrefetchBit& getPrefetch() const { return m_Prefetch; }
+    RequestPtr getRequestPtr() const { return m_pkt->req; }
 
     void print(std::ostream& out) const;
     bool functionalRead(Packet *pkt);