x86: implements vtophys

Calls walker to look up virt. to phys. page mapping

src/arch/x86/pagetable_walker.hh

@@ -48,6 +48,7 @@
 #include "mem/mem_object.hh"
 #include "mem/packet.hh"
 #include "params/X86PagetableWalker.hh"
+#include "sim/faults.hh"
 
 class ThreadContext;
 

src/arch/x86/system.cc

@@ -39,6 +39,7 @@
 
 #include "arch/x86/bios/smbios.hh"
 #include "arch/x86/bios/intelmp.hh"
+#include "arch/x86/isa_traits.hh"
 #include "arch/x86/regs/misc.hh"
 #include "arch/x86/system.hh"
 #include "arch/vtophys.hh"

src/arch/x86/vtophys.cc

@@ -39,19 +39,42 @@
 
 #include <string>
 
+#include "arch/x86/pagetable_walker.hh"
+#include "arch/x86/tlb.hh"
 #include "arch/x86/vtophys.hh"
+#include "base/trace.hh"
+#include "config/full_system.hh"
+#include "cpu/thread_context.hh"
+#include "sim/fault.hh"
 
 using namespace std;
 
 namespace X86ISA
 {
-    Addr vtophys(Addr vaddr)
+    Addr
+    vtophys(Addr vaddr)
     {
+#if FULL_SYSTEM
+        panic("Need access to page tables\n");
+#endif
         return vaddr;
     }
 
-    Addr vtophys(ThreadContext *tc, Addr addr)
+    Addr
+    vtophys(ThreadContext *tc, Addr vaddr)
     {
-        return addr;
+#if FULL_SYSTEM
+        Walker *walker = tc->getDTBPtr()->getWalker();
+        Addr size;
+        Addr addr = vaddr;
+        Fault fault = walker->startFunctional(tc, addr, size, BaseTLB::Read);
+        if (fault != NoFault)
+            panic("vtophys page walk returned fault\n");
+        Addr masked_addr = vaddr & (size - 1);
+        Addr paddr = addr | masked_addr;
+        DPRINTF(VtoPhys, "vtophys(%#x) -> %#x\n", vaddr, paddr);
+        return paddr;
+#endif
+        return vaddr;
     }
 }

src/arch/x86/vtophys.hh

@@ -40,12 +40,9 @@
 #ifndef __ARCH_X86_VTOPHYS_HH__
 #define __ARCH_X86_VTOPHYS_HH__
 
-#include "arch/x86/isa_traits.hh"
-#include "arch/x86/pagetable.hh"
 #include "base/types.hh"
 
 class ThreadContext;
-class FunctionalPort;
 
 namespace X86ISA
 {