96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
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/* $NetBSD: mm.h,v 1.2 2011/06/12 03:35:51 rmind Exp $ */
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/*-
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* Copyright (c) 2008 Joerg Sonnenberger <joerg@NetBSD.org>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _SYS_DEV_MM_H_
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#define _SYS_DEV_MM_H_
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#include <sys/uio.h>
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#include <uvm/uvm_prot.h>
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/*
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* Required access check for the physical address.
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*/
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int mm_md_physacc(paddr_t, vm_prot_t);
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/*
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* Optional open() hook for MD. Used by i386 for /dev/io emulation.
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*
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* machine/types.h must define __HAVE_MM_MD_OPEN to use this.
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*/
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int mm_md_open(dev_t, int, int, struct lwp *);
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/*
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* Optional read/write hook for additional minor devices.
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* Must handle the complete uio, not execute in a loop.
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*
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* machine/types.h must define __HAVE_MM_MD_READWRITE to use this.
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*/
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int mm_md_readwrite(dev_t, struct uio *);
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/*
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* Optional mmap hook for additional MD minor devices.
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*
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* machine/types.h must define __HAVE_MM_MD_READWRITE to use this.
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*/
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paddr_t mm_md_mmap(dev_t, off_t, int);
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/*
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* Optional access check for the virtual address. The third argument tells
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* mm that the check was done and uvm_kernacc is overriden.
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*
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* machine/types.h must define __HAVE_MM_MD_KERNACC to use this.
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*/
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int mm_md_kernacc(void *, vm_prot_t, bool *);
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/*
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* Optional hook to map physical address back to pre-mapped virtual space.
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* This is used e.g. when physical memory is lineary mapped.
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*
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* machine/types.h must define __HAVE_MM_MD_DIRECT_MAPPED_PHYS to use this.
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*/
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bool mm_md_direct_mapped_phys(paddr_t, vaddr_t *);
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/*
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* Optional hook to map virtual address back to physical address for explicit
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* access check. This is used e.g. when physical memory is lineary mapped.
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*
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* machine/types.h must define __HAVE_MM_MD_DIRECT_MAPPED_IO to use this.
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*/
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bool mm_md_direct_mapped_io(void *, paddr_t *);
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/*
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* Some architectures may need to deal with cache aliasing issues.
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*
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* machine/types.h must define __HAVE_MM_MD_CACHE_ALIASING to note that.
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*/
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#endif /* _SYS_DEV_MM_H_ */
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