1/* $NetBSD: xencomm.h,v 1.1.1.1 2011/12/07 13:15:46 cegger Exp $ */ 2/* 3 * Permission is hereby granted, free of charge, to any person obtaining a copy 4 * of this software and associated documentation files (the "Software"), to 5 * deal in the Software without restriction, including without limitation the 6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 7 * sell copies of the Software, and to permit persons to whom the Software is 8 * furnished to do so, subject to the following conditions: 9 * 10 * The above copyright notice and this permission notice shall be included in 11 * all copies or substantial portions of the Software. 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 19 * DEALINGS IN THE SOFTWARE. 20 * 21 * Copyright (C) IBM Corp. 2006 22 */ 23 24#ifndef _XEN_XENCOMM_H_ 25#define _XEN_XENCOMM_H_ 26 27/* A xencomm descriptor is a scatter/gather list containing physical 28 * addresses corresponding to a virtually contiguous memory area. The 29 * hypervisor translates these physical addresses to machine addresses to copy 30 * to and from the virtually contiguous area. 31 */ 32 33#define XENCOMM_MAGIC 0x58434F4D /* 'XCOM' */ 34#define XENCOMM_INVALID (~0UL) 35 36struct xencomm_desc { 37 uint32_t magic; 38 uint32_t nr_addrs; /* the number of entries in address[] */ 39 uint64_t address[0]; 40}; 41 42#endif /* _XEN_XENCOMM_H_ */ 43