Add suport for no allocation of cache block on a dma read passing through a cache from the cpu-side interface

--HG--
extra : convert_revision : 0a3b3741924ed39c1c8710d0963e4c8f3e73f81a

1 files changed, 10 insertions, 4 deletions

diff --git a/dev/ns_gige.cc b/dev/ns_gige.cc
index 7560b1994..0b416750f 100644
--- a/dev/ns_gige.cc
+++ b/dev/ns_gige.cc
@@ -120,11 +120,13 @@ NSGigE::NSGigE(Params *p)
         if (p->payload_bus)
             dmaInterface = new DMAInterface<Bus>(name() + ".dma",
                                                  p->header_bus,
-                                                 p->payload_bus, 1);
+                                                 p->payload_bus, 1,
+                                                 p->dma_no_allocate);
         else
             dmaInterface = new DMAInterface<Bus>(name() + ".dma",
                                                  p->header_bus,
-                                                 p->header_bus, 1);
+                                                 p->header_bus, 1,
+                                                 p->dma_no_allocate);
     } else if (p->payload_bus) {
         pioInterface = newPioInterface(name(), p->hier,
                                        p->payload_bus, this,
@@ -134,7 +136,8 @@ NSGigE::NSGigE(Params *p)
 
         dmaInterface = new DMAInterface<Bus>(name() + ".dma",
                                              p->payload_bus,
-                                             p->payload_bus, 1);
+                                             p->payload_bus, 1,
+                                             p->dma_no_allocate);
     }
 
 
@@ -2713,6 +2716,7 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(NSGigE)
     Param<uint32_t> tx_fifo_size;
     Param<uint32_t> rx_fifo_size;
     Param<uint32_t> m5reg;
+    Param<bool> dma_no_allocate;
 
 END_DECLARE_SIM_OBJECT_PARAMS(NSGigE)
 
@@ -2746,7 +2750,8 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(NSGigE)
     INIT_PARAM(pci_func, "PCI function code"),
     INIT_PARAM_DFLT(tx_fifo_size, "max size in bytes of txFifo", 131072),
     INIT_PARAM_DFLT(rx_fifo_size, "max size in bytes of rxFifo", 131072),
-    INIT_PARAM(m5reg, "m5 register")
+    INIT_PARAM(m5reg, "m5 register"),
+    INIT_PARAM_DFLT(dma_no_allocate, "Should DMA reads allocate cache lines", true)
 
 END_INIT_SIM_OBJECT_PARAMS(NSGigE)
 
@@ -2784,6 +2789,7 @@ CREATE_SIM_OBJECT(NSGigE)
     params->tx_fifo_size = tx_fifo_size;
     params->rx_fifo_size = rx_fifo_size;
     params->m5reg = m5reg;
+    params->dma_no_allocate = dma_no_allocate;
     return new NSGigE(params);
 }