2 * Copyright (C) 2006 Hollis Blanchard <hollisb@us.ibm.com>, IBM Corporation
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #ifndef _XEN_XENCOMM_H_
20 #define _XEN_XENCOMM_H_
22 /* A xencomm descriptor is a scatter/gather list containing physical
23 * addresses corresponding to a virtually contiguous memory area. The
24 * hypervisor translates these physical addresses to machine addresses to copy
25 * to and from the virtually contiguous area.
28 #define XENCOMM_MAGIC 0x58434F4D /* 'XCOM' */
29 #define XENCOMM_INVALID (~0UL)
33 uint32_t nr_addrs; /* the number of entries in address[] */
37 #endif /* _XEN_XENCOMM_H_ */