Add a functional port that is used to load the original binaries in FS

SE mode now has a port that goes to whatever toplevel mem object the
CPU sees that does the appropriate translation for syscall emulation

SConscript:
    translating port is a syscall emu only source
arch/alpha/system.cc:
base/loader/object_file.cc:
base/loader/object_file.hh:
    Use the new functional port to write the binaries into memory
cpu/cpu_exec_context.cc:
cpu/cpu_exec_context.hh:
cpu/simple/cpu.cc:
    We aren't always going to be writing straight to memory with syscalls
    support writing to a cache
mem/port.hh:
    Add a simple unidirectional functional port that panics on any incoming requests
mem/translating_port.hh:
    make translating port inherit from the simple port
sim/system.cc:
sim/system.hh:
    Add a functional port that is used to load the original binaries

--HG--
extra : convert_revision : 9096866d0b23e3aceea68394abb76e63c0f8fd8d

cpu/cpu_exec_context.hh

@@ -205,8 +205,8 @@ class CPUExecContext
     CPUExecContext(BaseCPU *_cpu, int _thread_num, System *_system,
                    AlphaITB *_itb, AlphaDTB *_dtb);
 #else
-    CPUExecContext(BaseCPU *_cpu, int _thread_num, Process *_process,
-                   int _asid);
+    CPUExecContext(BaseCPU *_cpu, int _thread_num, Process *_process, int _asid,
+            MemObject *memobj);
     // Constructor to use XC to pass reg file around.  Not used for anything
     // else.
     CPUExecContext(RegFile *regFile);