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

base/loader/object_file.cc

@@ -63,16 +63,10 @@ ObjectFile::~ObjectFile()
 
 
 bool
-ObjectFile::loadSection(Section *sec, Port *memPort, bool loadPhys)
+ObjectFile::loadSection(Section *sec, Port *memPort, Addr addrMask)
 {
     if (sec->size != 0) {
-        Addr addr = sec->baseAddr;
-        if (loadPhys) {
-            // this is Alpha-specific... going to have to fix this
-            // for other architectures
-            addr &= (ULL(1) << 40) - 1;
-        }
-
+        Addr addr = sec->baseAddr & addrMask;
         if (sec->fileImage) {
             memPort->writeBlob(addr, sec->fileImage, sec->size);
         }
@@ -86,11 +80,11 @@ ObjectFile::loadSection(Section *sec, Port *memPort, bool loadPhys)
 
 
 bool
-ObjectFile::loadSections(Port *memPort, bool loadPhys)
+ObjectFile::loadSections(Port *memPort, Addr addrMask)
 {
-    return (loadSection(&text, memPort, loadPhys)
-            && loadSection(&data, memPort, loadPhys)
-            && loadSection(&bss, memPort, loadPhys));
+    return (loadSection(&text, memPort, addrMask)
+            && loadSection(&data, memPort, addrMask)
+            && loadSection(&bss, memPort, addrMask));
 }
 
 

base/loader/object_file.hh

@@ -29,6 +29,7 @@
 #ifndef __OBJECT_FILE_HH__
 #define __OBJECT_FILE_HH__
 
+#include <limits>
 #include <string>
 
 #include "sim/host.hh"	// for Addr
@@ -72,7 +73,8 @@ class ObjectFile
 
     void close();
 
-    virtual bool loadSections(Port *memPort, bool loadPhys = false);
+    virtual bool loadSections(Port *memPort, Addr addrMask =
+            std::numeric_limits<Addr>::max());
     virtual bool loadGlobalSymbols(SymbolTable *symtab) = 0;
     virtual bool loadLocalSymbols(SymbolTable *symtab) = 0;
 
@@ -94,7 +96,7 @@ class ObjectFile
     Section data;
     Section bss;
 
-    bool loadSection(Section *sec, Port *memPort, bool loadPhys);
+    bool loadSection(Section *sec, Port *memPort, Addr addrMask);
     void setGlobalPointer(Addr global_ptr) { globalPtr = global_ptr; }
 
   public: