/* $NetBSD: xen_shm.h,v 1.7 2006/06/25 15:18:53 bouyer Exp $ */ /* * Copyright (c) 2005 Manuel Bouyer. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Manuel Bouyer. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include "opt_xen.h" #include <machine/param.h> #define XENSHM_MAX_PAGES_PER_REQUEST (MAXPHYS >> PAGE_SHIFT) /* * Helper routines for the backend drivers. This implement the necessary * functions to map a bunch of pages from foreign domains in our kernel VM * space, do I/O to it, and unmap it. */ #ifdef XEN3 int xen_shm_map(int, int, grant_ref_t *, vaddr_t *, grant_handle_t *, int); void xen_shm_unmap(vaddr_t, int, grant_handle_t *); #else int xen_shm_map(paddr_t *, int, int, vaddr_t *, int); void xen_shm_unmap(vaddr_t, paddr_t *, int, int); #endif int xen_shm_callback(int (*)(void *), void *); /* flags for xen_shm_map() */ #define XSHM_CALLBACK 0x01 /* called from a callback */ #define XSHM_RO 0x02 /* map the guest's memory read-only */