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/* $OpenBSD: uvm_km.h,v 1.13 2014/07/11 16:35:40 jsg Exp $ */
/* $NetBSD: uvm_km.h,v 1.9 1999/06/21 17:25:11 thorpej Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
* 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 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.
*
* from: Id: uvm_km.h,v 1.1.2.2 1997/12/30 12:03:15 mrg Exp
*/
#ifndef _UVM_UVM_KM_H_
#define _UVM_UVM_KM_H_
/*
* uvm_km.h
*/
#ifdef _KERNEL
#include <sys/mutex.h>
/*
* prototypes
*/
void uvm_km_init(vaddr_t, vaddr_t);
void uvm_km_page_init(void);
void uvm_km_pgremove(struct uvm_object *, vaddr_t, vaddr_t);
void uvm_km_pgremove_intrsafe(vaddr_t, vaddr_t);
#if !defined(__HAVE_PMAP_DIRECT)
#define UVM_KM_PAGES_LOWAT_MAX (2048)
#define UVM_KM_PAGES_HIWAT_MAX (4 * UVM_KM_PAGES_LOWAT_MAX)
struct uvm_km_free_page {
struct uvm_km_free_page *next;
};
struct uvm_km_pages {
struct mutex mtx;
/* Low and high water mark for addresses. */
int lowat;
int hiwat;
/* Kernel address pool. */
int free;
vaddr_t page[UVM_KM_PAGES_HIWAT_MAX];
struct uvm_km_free_page *freelist;
int freelistlen;
struct proc *km_proc;
};
extern struct uvm_km_pages uvm_km_pages;
#endif /* _HAVE_PMAP_DIRECT */
#endif /* _KERNEL */
#endif /* _UVM_UVM_KM_H_ */
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