arm: Cleanup arch headers to remove dma_device.hh dependency

Break the dependency on dma_device.hh by forward-declaring DmaPort in
the relevant header.

src/arch/arm/stage2_mmu.cc

@@ -38,6 +38,7 @@
  */
 
 #include "arch/arm/stage2_mmu.hh"
+
 #include "arch/arm/faults.hh"
 #include "arch/arm/system.hh"
 #include "arch/arm/table_walker.hh"

src/arch/arm/stage2_mmu.hh

@@ -42,6 +42,7 @@
 
 #include "arch/arm/faults.hh"
 #include "arch/arm/tlb.hh"
+#include "dev/dma_device.hh"
 #include "mem/request.hh"
 #include "params/ArmStage2MMU.hh"
 #include "sim/eventq.hh"

src/arch/arm/table_walker.cc

@@ -37,13 +37,13 @@
  * Authors: Ali Saidi
  *          Giacomo Gabrielli
  */
+#include "arch/arm/table_walker.hh"
 
 #include <memory>
 
 #include "arch/arm/faults.hh"
 #include "arch/arm/stage2_mmu.hh"
 #include "arch/arm/system.hh"
-#include "arch/arm/table_walker.hh"
 #include "arch/arm/tlb.hh"
 #include "cpu/base.hh"
 #include "cpu/thread_context.hh"
@@ -51,6 +51,7 @@
 #include "debug/Drain.hh"
 #include "debug/TLB.hh"
 #include "debug/TLBVerbose.hh"
+#include "dev/dma_device.hh"
 #include "sim/system.hh"
 
 using namespace ArmISA;

src/arch/arm/table_walker.hh

@@ -46,13 +46,14 @@
 #include "arch/arm/miscregs.hh"
 #include "arch/arm/system.hh"
 #include "arch/arm/tlb.hh"
-#include "dev/dma_device.hh"
 #include "mem/request.hh"
 #include "params/ArmTableWalker.hh"
 #include "sim/eventq.hh"
 
 class ThreadContext;
 
+class DmaPort;
+
 namespace ArmISA {
 class Translation;
 class TLB;

src/arch/arm/tlb.cc

@@ -42,6 +42,8 @@
  *          Steve Reinhardt
  */
 
+#include "arch/arm/tlb.hh"
+
 #include <memory>
 #include <string>
 #include <vector>
@@ -52,7 +54,6 @@
 #include "arch/arm/table_walker.hh"
 #include "arch/arm/stage2_lookup.hh"
 #include "arch/arm/stage2_mmu.hh"
-#include "arch/arm/tlb.hh"
 #include "arch/arm/utility.hh"
 #include "base/inifile.hh"
 #include "base/str.hh"

src/arch/arm/tlb.hh

@@ -50,7 +50,6 @@
 #include "arch/arm/vtophys.hh"
 #include "arch/generic/tlb.hh"
 #include "base/statistics.hh"
-#include "dev/dma_device.hh"
 #include "mem/request.hh"
 #include "params/ArmTLB.hh"
 #include "sim/probe/pmu.hh"