--- /dev/null
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2010, Peter Dinda <pdinda@northwestern.edu>
+ * Copyright (c) 2010, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Peter Dinda <pdinda@northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+#include <palacios/vmm.h>
+#include <palacios/vmm_stream.h>
+#include <palacios/vmm_dev_mgr.h>
+#include <palacios/vmm_sprintf.h>
+#include <palacios/vmm_host_events.h>
+#include <palacios/vmm_lock.h>
+#include <palacios/vmm_string.h>
+#include <devices/serial.h>
+
+
+struct stream_state {
+ void *stream;
+ struct vm_device *frontend_dev;
+};
+
+
+static int stream_read(char *buf, uint_t length, void *private_data)
+{
+ struct vm_device *dev = (struct vm_device *) private_data;
+ struct stream_state *state = (struct stream_state *) dev->private_data;
+
+ return V3_StreamRead(state->stream,buf,length);
+}
+
+static int stream_write(char *buf, uint_t length, void *private_data)
+{
+ struct vm_device *dev = (struct vm_device *) private_data;
+ struct stream_state *state = (struct stream_state *) dev->private_data;
+
+ return V3_StreamWrite(state->stream,buf,length);
+}
+
+
+
+static struct v3_stream_ops stream_ops = {
+ .write = stream_write,
+ .read = stream_read,
+};
+
+static struct v3_device_ops dev_ops = {
+ .free = NULL,
+ .reset = NULL,
+ .start = NULL,
+ .stop = NULL,
+};
+
+static int stream_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg)
+{
+ v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
+ const char * frontend_tag = v3_cfg_val(frontend_cfg, "tag");
+ struct vm_device * frontend = v3_find_dev(vm, frontend_tag);
+ char * dev_id = v3_cfg_val(cfg, "ID");
+ char * path = v3_cfg_val(cfg, "localname");
+ struct stream_state *state;
+
+ /* read configuration */
+ V3_ASSERT(frontend_cfg);
+ V3_ASSERT(frontend_tag);
+ V3_ASSERT(frontend);
+
+
+ /* allocate state */
+ state = (struct stream_state *)V3_Malloc(sizeof(struct stream_state));
+ V3_ASSERT(state);
+ state->frontend_dev = frontend;
+ V3_ASSERT(path);
+
+ /* The system is responsible for interpreting the localname of the stream */
+ state->stream = V3_StreamOpen(path, STREAM_OPEN_MODE_READ | STREAM_OPEN_MODE_WRITE);
+ if (!state->stream) {
+ PrintError("Could not open localname %s\n", path);
+ V3_Free(state);
+ return -1;
+ }
+
+ /* allocate device */
+ struct vm_device *dev = v3_allocate_device(dev_id, &dev_ops, state);
+ V3_ASSERT(dev);
+
+ /* attach device to virtual machine */
+ if (v3_attach_device(vm, dev) == -1) {
+ PrintError("Could not attach device %s\n", dev_id);
+ V3_Free(state);
+ return -1;
+ }
+
+ v3_stream_register_serial(frontend, &stream_ops, dev);
+
+ return 0;
+}
+
+device_register("STREAM", stream_init)
+