Initial version

code/userprog/addrspace.h

@@ -0,0 +1,53 @@
+// addrspace.h 
+//      Data structures to keep track of executing user programs 
+//      (address spaces).
+//
+//      For now, we don't keep any information about address spaces.
+//      The user level CPU state is saved and restored in the thread
+//      executing the user program (see thread.h).
+//
+// Copyright (c) 1992-1993 The Regents of the University of California.
+// All rights reserved.  See copyright.h for copyright notice and limitation 
+// of liability and disclaimer of warranty provisions.
+
+#ifndef ADDRSPACE_H
+#define ADDRSPACE_H
+
+#include "copyright.h"
+#include "filesys.h"
+#include "translate.h"
+#include "noff.h"
+#include "list.h"
+
+#define UserStacksAreaSize		1024	// increase this as necessary!
+
+class AddrSpace:public dontcopythis
+{
+  public:
+    AddrSpace (OpenFile * executable);	// Create an address space,
+    // initializing it with the program
+    // stored in the file "executable"
+    ~AddrSpace ();		// De-allocate an address space
+
+    void InitRegisters ();	// Initialize user-level CPU registers,
+    // before jumping to user code
+
+    void SaveState ();		// Save/restore address space-specific
+    void RestoreState ();	// info on a context switch 
+
+    unsigned Dump(FILE *output, unsigned addr_s, unsigned sections_x, unsigned virtual_x, unsigned virtual_width,
+		    unsigned physical_x, unsigned virtual_y, unsigned y,
+		    unsigned blocksize);
+				// Dump program layout as SVG
+    unsigned NumPages() { return numPages; }
+
+  private:
+    NoffHeader noffH;		// Program layout
+
+    TranslationEntry * pageTable; // Page table
+    unsigned int numPages;	// Number of pages in the page table
+};
+
+extern List AddrspaceList;
+
+#endif // ADDRSPACE_H