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Annotation of Gnu-Mach/xen/public/xencomm.h, revision 1.1.1.1

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

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