NetBSD/sys/dev/mm.h

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/* $NetBSD: mm.h,v 1.2 2011/06/12 03:35:51 rmind Exp $ */
/*-
* Copyright (c) 2008 Joerg Sonnenberger <joerg@NetBSD.org>.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``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
* COPYRIGHT HOLDERS OR CONTRIBUTORS 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.
*/
#ifndef _SYS_DEV_MM_H_
#define _SYS_DEV_MM_H_
#include <sys/uio.h>
#include <uvm/uvm_prot.h>
/*
* Required access check for the physical address.
*/
int mm_md_physacc(paddr_t, vm_prot_t);
/*
* Optional open() hook for MD. Used by i386 for /dev/io emulation.
*
* machine/types.h must define __HAVE_MM_MD_OPEN to use this.
*/
int mm_md_open(dev_t, int, int, struct lwp *);
/*
* Optional read/write hook for additional minor devices.
* Must handle the complete uio, not execute in a loop.
*
* machine/types.h must define __HAVE_MM_MD_READWRITE to use this.
*/
int mm_md_readwrite(dev_t, struct uio *);
/*
* Optional mmap hook for additional MD minor devices.
*
* machine/types.h must define __HAVE_MM_MD_READWRITE to use this.
*/
paddr_t mm_md_mmap(dev_t, off_t, int);
/*
* Optional access check for the virtual address. The third argument tells
* mm that the check was done and uvm_kernacc is overriden.
*
* machine/types.h must define __HAVE_MM_MD_KERNACC to use this.
*/
int mm_md_kernacc(void *, vm_prot_t, bool *);
/*
* Optional hook to map physical address back to pre-mapped virtual space.
* This is used e.g. when physical memory is lineary mapped.
*
* machine/types.h must define __HAVE_MM_MD_DIRECT_MAPPED_PHYS to use this.
*/
bool mm_md_direct_mapped_phys(paddr_t, vaddr_t *);
/*
* Optional hook to map virtual address back to physical address for explicit
* access check. This is used e.g. when physical memory is lineary mapped.
*
* machine/types.h must define __HAVE_MM_MD_DIRECT_MAPPED_IO to use this.
*/
bool mm_md_direct_mapped_io(void *, paddr_t *);
/*
* Some architectures may need to deal with cache aliasing issues.
*
* machine/types.h must define __HAVE_MM_MD_CACHE_ALIASING to note that.
*/
#endif /* _SYS_DEV_MM_H_ */