Ruby: remove reference to g_system_ptr from class Message

This patch was initiated so as to remove reference to g_system_ptr,
the pointer to Ruby System that is used for getting the current time.
That simple change actual requires changing a lot many things in slicc and
garnet. All these changes are related to how time is handled.

In most of the places, g_system_ptr has been replaced by another clock
object. The changes have been done under the assumption that all the
components in the memory system are on the same clock frequency, but the
actual clocks might be distributed.

1 files changed, 14 insertions, 13 deletions

diff --git a/src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc b/src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc
index 9e4c1ef9a..7267da36d 100644
--- a/src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc
+++ b/src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc
@@ -68,7 +68,7 @@ NetworkInterface::NetworkInterface(int id, int virtual_networks,
 
     for (int i = 0; i < m_num_vcs; i++) {
         m_out_vc_state.push_back(new OutVcState(i));
-        m_out_vc_state[i]->setState(IDLE_, g_system_ptr->getTime());
+        m_out_vc_state[i]->setState(IDLE_, m_net_ptr->curCycle());
     }
 }
 
@@ -167,19 +167,20 @@ NetworkInterface::flitisizeMessage(MsgPtr msg_ptr, int vnet)
         }
         for (int i = 0; i < num_flits; i++) {
             m_net_ptr->increment_injected_flits(vnet);
-            flit *fl = new flit(i, vc, vnet, num_flits, new_msg_ptr);
-            fl->set_delay(g_system_ptr->getTime() - msg_ptr->getTime());
+            flit *fl = new flit(i, vc, vnet, num_flits, new_msg_ptr,
+                                m_net_ptr->curCycle());
+            fl->set_delay(m_net_ptr->curCycle() - msg_ptr->getTime());
             m_ni_buffers[vc]->insert(fl);
         }
 
-        m_out_vc_state[vc]->setState(VC_AB_, g_system_ptr->getTime());
+        m_out_vc_state[vc]->setState(VC_AB_, m_net_ptr->curCycle());
 
         // setting an output vc request for the next hop.
         // This flit will be ready to traverse the link and into the next hop
         // only when an output vc is acquired at the next hop
         outNetLink->request_vc_link(vc,
                                     new_net_msg_ptr->getInternalDestination(),
-                                    g_system_ptr->getTime());
+                                    m_net_ptr->curCycle());
     }
 
     return true ;
@@ -222,7 +223,7 @@ NetworkInterface::calculateVC(int vnet)
             m_vc_allocator[vnet] = 0;
 
         if (m_out_vc_state[(vnet*m_vc_per_vnet) + delta]->isInState(IDLE_,
-            g_system_ptr->getTime())) {
+            m_net_ptr->curCycle())) {
             return ((vnet*m_vc_per_vnet) + delta);
         }
     }
@@ -266,18 +267,18 @@ NetworkInterface::wakeup()
         flit *t_flit = inNetLink->consumeLink();
         if (t_flit->get_type() == TAIL_ || t_flit->get_type() == HEAD_TAIL_) {
             DPRINTF(RubyNetwork, "m_id: %d, Message delivered at time: %lld\n",
-                    m_id, g_system_ptr->getTime());
+                    m_id, m_net_ptr->curCycle());
 
             outNode_ptr[t_flit->get_vnet()]->enqueue(
                 t_flit->get_msg_ptr(), 1);
 
             // signal the upstream router that this vc can be freed now
             inNetLink->release_vc_link(t_flit->get_vc(),
-                g_system_ptr->getTime() + 1);
+                m_net_ptr->curCycle() + 1);
         }
         int vnet = t_flit->get_vnet();
         m_net_ptr->increment_received_flits(vnet);
-        int network_delay = g_system_ptr->getTime() -
+        int network_delay = m_net_ptr->curCycle() -
                             t_flit->get_enqueue_time();
         int queueing_delay = t_flit->get_delay();
         m_net_ptr->increment_network_latency(network_delay, vnet);
@@ -304,14 +305,14 @@ NetworkInterface::scheduleOutputLink()
         vc++;
         if (vc == m_num_vcs)
             vc = 0;
-        if (m_ni_buffers[vc]->isReady()) {
+        if (m_ni_buffers[vc]->isReady(m_net_ptr->curCycle())) {
             if (m_out_vc_state[vc]->isInState(ACTIVE_,
-               g_system_ptr->getTime()) &&
+               m_net_ptr->curCycle()) &&
                outNetLink->isBufferNotFull_link(vc)) {  // buffer backpressure
 
                 // Just removing the flit
                 flit *t_flit = m_ni_buffers[vc]->getTopFlit();
-                t_flit->set_time(g_system_ptr->getTime() + 1);
+                t_flit->set_time(m_net_ptr->curCycle() + 1);
                 outSrcQueue->insert(t_flit);
 
                 // schedule the out link
@@ -332,7 +333,7 @@ NetworkInterface::checkReschedule()
         }
     }
     for (int vc = 0; vc < m_num_vcs; vc++) {
-        if (m_ni_buffers[vc]->isReadyForNext()) {
+        if (m_ni_buffers[vc]->isReadyForNext(m_net_ptr->curCycle())) {
             scheduleEvent(1);
             return;
         }