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      1  1.12    bouyer /*      $NetBSD: xen_shm.h,v 1.12 2020/04/25 15:26:17 bouyer 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 
     30  1.11  jdolecek #define XENSHM_MAX_PAGES_PER_REQUEST ((MAXPHYS + PAGE_SIZE) >> PAGE_SHIFT)
     31   1.4       tls 
     32   1.2    bouyer /*
     33   1.2    bouyer  * Helper routines for the backend drivers. This implement the necessary
     34   1.3      yamt  * functions to map a bunch of pages from foreign domains in our kernel VM
     35   1.2    bouyer  * space, do I/O to it, and unmap it.
     36   1.2    bouyer  */
     37   1.2    bouyer 
     38  1.11  jdolecek int  xen_shm_map(int, int, grant_ref_t *, vaddr_t, grant_handle_t *, int);
     39   1.7    bouyer void xen_shm_unmap(vaddr_t, int, grant_handle_t *);
     40   1.2    bouyer 
     41   1.2    bouyer /* flags for xen_shm_map() */
     42   1.6    bouyer #define XSHM_RO 0x02		/* map the guest's memory read-only */
     43