183 lines
6.2 KiB
C
183 lines
6.2 KiB
C
/*
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* Copyright (c) 1991 Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* The Mach Operating System project at Carnegie-Mellon University.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT 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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* from: @(#)pmap.h 7.4 (Berkeley) 5/7/91
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* $Id: pmap.h,v 1.6 1994/04/15 07:04:43 cgd Exp $
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*
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*
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* Copyright (c) 1987, 1990 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Avadis Tevanian, Jr.
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* Machine address mapping definitions -- machine-independent
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* section. [For machine-dependent section, see "machine/pmap.h".]
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*/
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#ifndef _PMAP_VM_
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#define _PMAP_VM_
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/*
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* Each machine dependent implementation is expected to
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* keep certain statistics. They may do this anyway they
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* so choose, but are expected to return the statistics
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* in the following structure.
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*/
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struct pmap_statistics {
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long resident_count; /* # of pages mapped (total)*/
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long wired_count; /* # of pages wired */
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};
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typedef struct pmap_statistics *pmap_statistics_t;
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#include <machine/pmap.h>
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#ifdef KERNEL
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/*
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* Currently this option is used on the i386 to be able to handle the
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* memory from 0-640k and 1M+.
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*/
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#ifdef MACHINE_NONCONTIG
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/*
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* Routines used for initialization.
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* There is traditionally also a pmap_bootstrap,
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* used very early by machine-dependent code,
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* but it is not part of the interface.
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*/
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extern vm_offset_t pmap_steal_memory(); /* During VM initialization,
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* steal a chunk of memory.
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*/
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extern unsigned int pmap_free_pages(); /* During VM initialization,
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* report remaining unused
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* physical pages.
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*/
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extern void pmap_startup(); /* During VM initialization,
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* use remaining physical pages
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* to allocate page frames.
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*/
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extern void pmap_init(); /* Initialization,
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* after kernel runs
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* in virtual memory.
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*/
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/*
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* Currently the following isn't really an option. So don't define it.
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*/
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#undef MACHINE_PAGES
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#ifndef MACHINE_PAGES
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/*
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* If machine/pmap.h defines MACHINE_PAGES, it must implement
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* the above functions. The pmap modules has complete control.
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* Otherwise, it must implement
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* pmap_free_pages
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* pmap_virtual_space
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* pmap_next_page
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* pmap_init
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* and vm/vm_page.c implements pmap_steal_memory and pmap_startup
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* using pmap_free_pages, pmap_next_page, pmap_virtual_space,
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* and pmap_enter. pmap_free_pages may over-estimate the number
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* of unused physical pages, and pmap_next_page may return FALSE
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* to indicate that there are no more unused pages to return.
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* However, for best performance pmap_free_pages should be accurate.
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*/
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extern boolean_t pmap_next_page(); /* During VM initialization,
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* return the next unused
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* physical page.
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*/
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extern void pmap_virtual_space(); /* During VM initialization,
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* report virtual space
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* available for the kernel.
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*/
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#endif /* MACHINE_PAGES */
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#endif /* MACHINE_NONCONTIG */
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#ifdef MACHINE_NONCONTIG
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void pmap_init __P((void));
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#else
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void pmap_init __P((vm_offset_t s, vm_offset_t e));
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#endif
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void pmap_pinit __P((struct pmap *pmap));
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void pmap_release __P((struct pmap *pmap));
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vm_offset_t pmap_map();
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pmap_t pmap_create();
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void pmap_destroy();
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void pmap_reference();
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void pmap_remove();
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void pmap_page_protect();
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void pmap_protect();
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void pmap_enter();
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vm_offset_t pmap_extract();
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void pmap_update();
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void pmap_collect();
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void pmap_activate();
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void pmap_deactivate();
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void pmap_copy();
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void pmap_statistics();
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void pmap_clear_reference();
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boolean_t pmap_is_referenced();
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#ifndef pmap_kernel
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pmap_t pmap_kernel();
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#endif
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void pmap_redzone();
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boolean_t pmap_access();
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extern pmap_t kernel_pmap;
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#endif
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#endif /* _PMAP_VM_ */
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