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physmap.h revision 1.2 
      1 /*	$NetBSD: physmap.h,v 1.2 2013/01/19 01:04:52 rmind Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _SYS_PHYSMAP_H_
     33 #define _SYS_PHYSMAP_H_
     34 
     35 #if !defined(_KERNEL)
     36 #error "not supposed to be exposed to userland"
     37 #endif
     38 
     39 #include <sys/types.h>
     40 #include <sys/uio.h>
     41 #include <uvm/uvm_extern.h>
     42 
     43 typedef struct {
     44 	paddr_t ps_addr;
     45 	psize_t ps_len;
     46 } physmap_segment_t;
     47 
     48 /* typedef is in <sys/types.h> */
     49 struct physmap {
     50 	uint16_t pm_nsegs;
     51 	uint16_t pm_maxsegs;
     52 	physmap_segment_t pm_segs[0];
     53 };
     54 
     55 int	physmap_create_iov(physmap_t **, const struct vmspace *,
     56 	    struct iovec *, size_t);
     57 int	physmap_create_linear(physmap_t **, const struct vmspace *,
     58 	    vaddr_t, vsize_t);
     59 physmap_t *
     60 	physmap_create_pagelist(struct vm_page **, size_t);
     61 
     62 void	physmap_destroy(physmap_t *);
     63 
     64 void *	physmap_map_init(physmap_t *, size_t, vm_prot_t);
     65 size_t	physmap_map(void *, vaddr_t *);
     66 void	physmap_map_fini(void *);
     67 
     68 void	physmap_zero(physmap_t *, size_t, size_t);
     69 
     70 #endif /* _SYS_PHYSMAP_H_ */
     71