--- upstream/dynamips-0.2.6-RC1/dev_ram.c	2007/10/06 16:03:58	2
+++ upstream/dynamips-0.2.7/dev_ram.c	2007/10/06 16:29:14	10
@@ -1,6 +1,8 @@
 /*
- * Cisco C7200 (Predator) RAM emulation
+ * Cisco router simulation platform.
  * Copyright (c) 2006 Christophe Fillot.  All rights reserved.
+ * 
+ * RAM emulation.
  */
 
 #include <stdio.h>
@@ -10,7 +12,8 @@
 #include <errno.h>
 #include <unistd.h>
 
-#include "mips64.h"
+#include "cpu.h"
+#include "vm.h"
 #include "dynamips.h"
 #include "memory.h"
 #include "device.h"
@@ -20,6 +23,7 @@
    vm_obj_t vm_obj;
    struct vdevice *dev;
    char *filename;
+   int delete_file;
 };
 
 /* Shutdown a RAM device */
@@ -31,7 +35,7 @@
       free(d->dev);
 
       /* Remove filename used to virtualize RAM */
-      if (d->filename) {
+      if (d->filename && d->delete_file) {
          unlink(d->filename);
          free(d->filename);
       }
@@ -42,7 +46,8 @@
 }
 
 /* Initialize a RAM zone */
-int dev_ram_init(vm_instance_t *vm,char *name,int use_mmap,
+int dev_ram_init(vm_instance_t *vm,char *name,int use_mmap,int delete_file,
+                 char *alternate_name,int sparse,
                  m_uint64_t paddr,m_uint32_t len)
 {
    struct ram_data *d;
@@ -54,22 +59,70 @@
    }
 
    memset(d,0,sizeof(*d));
+   d->delete_file = delete_file;
 
    vm_object_init(&d->vm_obj);
    d->vm_obj.name = name;
    d->vm_obj.data = d;
    d->vm_obj.shutdown = (vm_shutdown_t)dev_ram_shutdown;
 
-   if (use_mmap && !(d->filename = vm_build_filename(vm,name))) {
-      fprintf(stderr,"RAM: unable to create filename.\n");
-      goto err_filename;
+   if (use_mmap) {
+      if (!alternate_name)
+         d->filename = vm_build_filename(vm,name);
+      else
+         d->filename = strdup(alternate_name);
+
+      if (!d->filename) {
+         fprintf(stderr,"RAM: unable to create filename.\n");
+         goto err_filename;
+      }
    }
 
-   if (!(d->dev = dev_create_ram(vm,name,d->filename,paddr,len))) {
+   if (!(d->dev = dev_create_ram(vm,name,sparse,d->filename,paddr,len))) {
       fprintf(stderr,"RAM: unable to create device.\n");
       goto err_dev_create;
    }
 
+   vm_object_add(vm,&d->vm_obj);
+   return(0);
+
+ err_dev_create:
+   free(d->filename);
+ err_filename:
+   free(d);
+   return(-1);
+}
+
+/* Initialize a ghosted RAM zone */
+int dev_ram_ghost_init(vm_instance_t *vm,char *name,int sparse,char *filename,
+                       m_uint64_t paddr,m_uint32_t len)
+{
+   struct ram_data *d;
+
+   /* allocate the private data structure */
+   if (!filename || !(d = malloc(sizeof(*d)))) {
+      fprintf(stderr,"RAM_ghost: unable to create device.\n");
+      return(-1);
+   }
+
+   memset(d,0,sizeof(*d));
+   d->delete_file = FALSE;
+
+   if (!(d->filename = strdup(filename)))
+      goto err_filename;
+
+   vm_object_init(&d->vm_obj);
+   d->vm_obj.name = name;
+   d->vm_obj.data = d;
+   d->vm_obj.shutdown = (vm_shutdown_t)dev_ram_shutdown;
+
+   if (!(d->dev = dev_create_ghost_ram(vm,name,sparse,d->filename,
+                                       paddr,len))) 
+   {
+      fprintf(stderr,"RAM_ghost: unable to create device.\n");
+      goto err_dev_create;
+   }
+
    vm_object_add(vm,&d->vm_obj);
    return(0);