NetBSD/sys/vm/pmap.h

/* 
 * Copyright (c) 1991 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * The Mach Operating System project at Carnegie-Mellon University.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *	from: @(#)pmap.h	7.4 (Berkeley) 5/7/91
 *	$Id: pmap.h,v 1.5 1993/08/29 12:12:20 brezak Exp $
 *
 *
 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Avadis Tevanian, Jr.
 * 
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#ifndef _VM_PMAP_H_
#define _VM_PMAP_H_

/*
 *	Machine address mapping definitions -- machine-independent
 *	section.  [For machine-dependent section, see "machine/pmap.h".]
 */

#include <machine/pmap.h>

#ifdef KERNEL

/*
 * Currently this option is used on the i386 to be able to handle the
 * memory from 0-640k and 1M+.
 */
#ifdef MACHINE_NONCONTIG
/*
 *	Routines used for initialization.
 *	There is traditionally also a pmap_bootstrap,
 *	used very early by machine-dependent code,
 *	but it is not part of the interface.
 */
extern vm_offset_t	pmap_steal_memory();	/* During VM initialization,
						 * steal a chunk of memory.
						 */
extern unsigned int	pmap_free_pages();	/* During VM initialization,
						 * report remaining unused
						 * physical pages.
						 */
extern void		pmap_startup();		/* During VM initialization,
						 * use remaining physical pages
						 * to allocate page frames.
						 */
extern void		pmap_init();		/* Initialization,
						 * after kernel runs
						 * in virtual memory.
						 */

/*
 * Currently the following isn't really an option. So don't define it.
 */
#undef	MACHINE_PAGES
#ifndef	MACHINE_PAGES
/*
 *	If machine/pmap.h defines MACHINE_PAGES, it must implement
 *	the above functions.  The pmap modules has complete control.
 *	Otherwise, it must implement
 *		pmap_free_pages
 *		pmap_virtual_space
 *		pmap_next_page
 *		pmap_init
 *	and vm/vm_page.c implements pmap_steal_memory and pmap_startup
 *	using pmap_free_pages, pmap_next_page, pmap_virtual_space,
 *	and pmap_enter.  pmap_free_pages may over-estimate the number
 *	of unused physical pages, and pmap_next_page may return FALSE
 *	to indicate that there are no more unused pages to return.
 *	However, for best performance pmap_free_pages should be accurate.
 */
extern boolean_t	pmap_next_page();	/* During VM initialization,
						 * return the next unused
						 * physical page.
						 */
extern void		pmap_virtual_space();	/* During VM initialization,
						 * report virtual space
						 * available for the kernel.
						 */
#endif	/* MACHINE_PAGES */

#endif /* MACHINE_NONCONTIG */

#ifdef	MACHINE_NONCONTIG
void		pmap_init __P((void));
#else
void		pmap_init __P((vm_offset_t s, vm_offset_t e));
#endif
void		pmap_pinit __P((struct pmap *pmap));
void		pmap_release __P((struct pmap *pmap));
vm_offset_t	pmap_map();
pmap_t		pmap_create();
void		pmap_destroy();
void		pmap_reference();
void		pmap_remove();
void		pmap_page_protect();
void		pmap_protect();
void		pmap_enter();
vm_offset_t	pmap_extract();
void		pmap_update();
void		pmap_collect();
void		pmap_activate();
void		pmap_deactivate();
void		pmap_copy();
void		pmap_statistics();
void		pmap_clear_reference();
boolean_t	pmap_is_referenced();
#ifndef pmap_kernel
pmap_t		pmap_kernel();
#endif

void		pmap_redzone();
boolean_t	pmap_access();

extern pmap_t	kernel_pmap;
#endif

#endif /* !_VM_PMAP_H_ */