release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/xen/xenbus/xenbus_comms.h

   1 /*
   2  * Private include for xenbus communications.
   3  *
   4  * Copyright (C) 2005 Rusty Russell, IBM Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation; or, when distributed
   9  * separately from the Linux kernel or incorporated into other
  10  * software packages, subject to the following license:
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a copy
  13  * of this source file (the "Software"), to deal in the Software without
  14  * restriction, including without limitation the rights to use, copy, modify,
  15  * merge, publish, distribute, sublicense, and/or sell copies of the Software,
  16  * and to permit persons to whom the Software is furnished to do so, subject to
  17  * the following conditions:
  18  *
  19  * The above copyright notice and this permission notice shall be included in
  20  * all copies or substantial portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  23  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  25  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  26  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  27  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  28  * IN THE SOFTWARE.
  29  */
  30
  31 #ifndef _XENBUS_COMMS_H
  32 #define _XENBUS_COMMS_H
  33
  34 int xs_init(void);
  35 int xb_init_comms(void);
  36
  37 /* Low level routines. */
  38 int xb_write(const void *data, unsigned len);
  39 int xb_read(void *data, unsigned len);
  40 int xb_data_to_read(void);
  41 int xb_wait_for_data_to_read(void);
  42 int xs_input_avail(void);
  43 extern struct xenstore_domain_interface *xen_store_interface;
  44 extern int xen_store_evtchn;
  45
  46 #endif /* _XENBUS_COMMS_H */