dev: Rename CopyEngineReg namespace as copy_engine_reg

As part of recent decisions regarding namespace
naming conventions, all namespaces will be changed
to snake case.

::CopyEngineReg became ::copy_engine_reg.

Change-Id: I8ac5ff272ab6a663a25f245c48827c7ff1b6abc5
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/45387
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>

src/dev/pci/copy_engine.cc

@@ -56,7 +56,7 @@
 #include "sim/stats.hh"
 #include "sim/system.hh"
 
-using namespace CopyEngineReg;
+using namespace copy_engine_reg;
 
 CopyEngine::CopyEngine(const Params &p)
     : PciDevice(p),

src/dev/pci/copy_engine.hh

@@ -62,9 +62,9 @@ class CopyEngine : public PciDevice
       private:
         DmaPort cePort;
         CopyEngine *ce;
-        CopyEngineReg::ChanRegs  cr;
+        copy_engine_reg::ChanRegs  cr;
         int channelId;
-        CopyEngineReg::DmaDesc *curDmaDesc;
+        copy_engine_reg::DmaDesc *curDmaDesc;
         uint8_t *copyBuffer;
 
         bool busy;
@@ -149,7 +149,7 @@ class CopyEngine : public PciDevice
     } copyEngineStats;
 
     // device registers
-    CopyEngineReg::Regs regs;
+    copy_engine_reg::Regs regs;
 
     // Array of channels each one with regs/dma port/etc
     std::vector<CopyEngineChannel*> chan;

src/dev/pci/copy_engine_defs.hh

@@ -30,10 +30,12 @@
  * Register and structure descriptions for Intel's I/O AT DMA Engine
  */
 #include "base/bitfield.hh"
+#include "base/compiler.hh"
 #include "sim/serialize.hh"
 
-namespace CopyEngineReg {
-
+GEM5_DEPRECATED_NAMESPACE(CopyEngineReg, copy_engine_reg);
+namespace copy_engine_reg
+{
 
 // General Channel independant registers, 128 bytes starting at 0x00
 const uint32_t GEN_CHANCOUNT    = 0x00;
@@ -232,6 +234,6 @@ struct ChanRegs : public Serializable
 
 };
 
-} // namespace CopyEngineReg
+} // namespace copy_engine_reg