arch,mem: Move page table construction into the arch classes.

This gets rid of an awkward NoArchPageTable class, and also gives the
arch a place to inject ISA specific parameters (specifically page size)
without having to have TheISA:: in the generic version of these types.

Change-Id: I1412f303460d5c43dafdb9b3cd07af81c908a441
Reviewed-on: https://gem5-review.googlesource.com/6981
Reviewed-by: Alexandru Duțu <alexandru.dutu@amd.com>
Maintainer: Gabe Black <gabeblack@google.com>

2 files changed, 18 insertions, 11 deletions

diff --git a/src/arch/x86/process.cc b/src/arch/x86/process.cc
index 1ad1315da..f11cc3438 100644
--- a/src/arch/x86/process.cc
+++ b/src/arch/x86/process.cc
@@ -60,6 +60,7 @@
 #include "debug/Stack.hh"
 #include "mem/multi_level_page_table.hh"
 #include "mem/page_table.hh"
+#include "params/Process.hh"
 #include "sim/aux_vector.hh"
 #include "sim/process_impl.hh"
 #include "sim/syscall_desc.hh"
@@ -95,10 +96,16 @@ static const int ArgumentReg32[] = {
 static const int NumArgumentRegs32 M5_VAR_USED =
     sizeof(ArgumentReg) / sizeof(const int);
 
-X86Process::X86Process(ProcessParams * params, ObjectFile *objFile,
+X86Process::X86Process(ProcessParams *params, ObjectFile *objFile,
                        SyscallDesc *_syscallDescs, int _numSyscallDescs)
-    : Process(params, objFile), syscallDescs(_syscallDescs),
-      numSyscallDescs(_numSyscallDescs)
+    : Process(params, params->useArchPT ?
+                      static_cast<PageTableBase *>(
+                              new ArchPageTable(params->name, params->pid,
+                                                params->system)) :
+                      static_cast<PageTableBase *>(
+                              new FuncPageTable(params->name, params->pid)),
+              objFile),
+      syscallDescs(_syscallDescs), numSyscallDescs(_numSyscallDescs)
 {
 }
 
diff --git a/src/arch/x86/process.hh b/src/arch/x86/process.hh
index 3eb9620c9..e5e18570d 100644
--- a/src/arch/x86/process.hh
+++ b/src/arch/x86/process.hh
@@ -59,6 +59,14 @@ namespace X86ISA
     class X86Process : public Process
     {
       protected:
+        /**
+         * Declaration of architectural page table for x86.
+         *
+         * These page tables are stored in system memory and respect x86
+         * specification.
+         */
+        typedef MultiLevelPageTable<PageTableOps> ArchPageTable;
+
         Addr _gdtStart;
         Addr _gdtSize;
 
@@ -189,14 +197,6 @@ namespace X86ISA
                    Process *process, TheISA::IntReg flags) override;
     };
 
-    /**
-     * Declaration of architectural page table for x86.
-     *
-     * These page tables are stored in system memory and respect x86
-     * specification.
-     */
-    typedef MultiLevelPageTable<PageTableOps> ArchPageTable;
-
 }
 
 #endif // __ARCH_X86_PROCESS_HH__