98 lines
3.3 KiB
C
98 lines
3.3 KiB
C
/* $NetBSD: mm.h,v 1.4 2021/09/11 20:28:06 andvar 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 overridden.
|
|
*
|
|
* 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.
|
|
* Optional hook to fetch a page's current color and returns whether
|
|
* that page can be direct mapped.
|
|
* machine/types.h must define __HAVE_MM_MD_CACHE_ALIASING to use this.
|
|
*/
|
|
bool mm_md_page_color(paddr_t, int *);
|
|
|
|
#endif /* _SYS_DEV_MM_H_ */
|