ruby: single physical memory in fs mode

Both ruby and the system used to maintain memory copies.  With the changes
carried for programmed io accesses, only one single memory is required for
fs simulations.  This patch sets the copy of memory that used to reside
with the system to null, so that no space is allocated, but address checks
can still be carried out.  All the memory accesses now source and sink values
to the memory maintained by ruby.

1 files changed, 1 insertions, 4 deletions

diff --git a/src/mem/ruby/system/DMASequencer.hh b/src/mem/ruby/system/DMASequencer.hh
index a24db2d34..be386f1a1 100644
--- a/src/mem/ruby/system/DMASequencer.hh
+++ b/src/mem/ruby/system/DMASequencer.hh
@@ -66,11 +66,10 @@ class DMASequencer : public MemObject
     {
       private:
         SlavePacketQueue queue;
-        bool access_phys_mem;
 
       public:
         MemSlavePort(const std::string &_name, DMASequencer *_port,
-               bool _access_phys_mem, PortID id);
+                     PortID id);
         void hitCallback(PacketPtr pkt);
         void evictionCallback(const Address& address);
 
@@ -140,8 +139,6 @@ class DMASequencer : public MemObject
     System* system;
 
     bool retry;
-    bool access_phys_mem;
-
     bool m_is_busy;
     uint64_t m_data_block_mask;
     DMARequest active_request;