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xen_shm.h revision 1.7.76.1 
      1  1.7.76.1     jym /*      $NetBSD: xen_shm.h,v 1.7.76.1 2009/11/01 13:58:45 jym Exp $      */
      2       1.2  bouyer 
      3       1.2  bouyer /*
      4       1.2  bouyer  * Copyright (c) 2005 Manuel Bouyer.
      5       1.2  bouyer  *
      6       1.2  bouyer  * Redistribution and use in source and binary forms, with or without
      7       1.2  bouyer  * modification, are permitted provided that the following conditions
      8       1.2  bouyer  * are met:
      9       1.2  bouyer  * 1. Redistributions of source code must retain the above copyright
     10       1.2  bouyer  *    notice, this list of conditions and the following disclaimer.
     11       1.2  bouyer  * 2. Redistributions in binary form must reproduce the above copyright
     12       1.2  bouyer  *    notice, this list of conditions and the following disclaimer in the
     13       1.2  bouyer  *    documentation and/or other materials provided with the distribution.
     14       1.2  bouyer  *
     15       1.2  bouyer  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16       1.2  bouyer  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17       1.2  bouyer  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18       1.2  bouyer  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19       1.2  bouyer  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20       1.2  bouyer  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21       1.2  bouyer  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22       1.2  bouyer  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23       1.2  bouyer  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24       1.2  bouyer  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25       1.2  bouyer  *
     26       1.2  bouyer  */
     27       1.2  bouyer 
     28       1.6  bouyer #include "opt_xen.h"
     29       1.4     tls #include <machine/param.h>
     30       1.4     tls 
     31       1.4     tls #define XENSHM_MAX_PAGES_PER_REQUEST (MAXPHYS >> PAGE_SHIFT)
     32       1.4     tls 
     33       1.2  bouyer /*
     34       1.2  bouyer  * Helper routines for the backend drivers. This implement the necessary
     35       1.3    yamt  * functions to map a bunch of pages from foreign domains in our kernel VM
     36       1.2  bouyer  * space, do I/O to it, and unmap it.
     37       1.2  bouyer  */
     38       1.2  bouyer 
     39       1.7  bouyer int  xen_shm_map(int, int, grant_ref_t *, vaddr_t *, grant_handle_t *, int);
     40       1.7  bouyer void xen_shm_unmap(vaddr_t, int, grant_handle_t *);
     41       1.2  bouyer int xen_shm_callback(int (*)(void *), void *);
     42       1.2  bouyer 
     43       1.2  bouyer /* flags for xen_shm_map() */
     44       1.2  bouyer #define XSHM_CALLBACK 0x01	/* called from a callback */
     45       1.6  bouyer #define XSHM_RO 0x02		/* map the guest's memory read-only */
     46