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