8256655132
noticed some major enhancements available for UP situations. The number of UP TLB flushes is decreased much more than significantly with these changes. Since a TLB flush appears to cost minimally approx 80 cycles, this is a "nice" enhancement, equiv to eliminating between 40 and 160 instructions per TLB flush. Changes include making sure that kernel threads all use the same PTD, and eliminate unneeded PTD switches at context switch time.
140 lines
5.8 KiB
C
140 lines
5.8 KiB
C
/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. 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 8.1 (Berkeley) 6/11/93
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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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* $Id: pmap.h,v 1.24 1997/08/05 23:03:24 dyson Exp $
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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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void pmap_change_wiring __P((pmap_t, vm_offset_t, boolean_t));
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void pmap_clear_modify __P((vm_offset_t pa));
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void pmap_clear_reference __P((vm_offset_t pa));
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void pmap_copy __P((pmap_t, pmap_t, vm_offset_t, vm_size_t,
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vm_offset_t));
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void pmap_copy_page __P((vm_offset_t, vm_offset_t));
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void pmap_destroy __P((pmap_t));
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void pmap_enter __P((pmap_t, vm_offset_t, vm_offset_t, vm_prot_t,
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boolean_t));
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vm_offset_t pmap_extract __P((pmap_t, vm_offset_t));
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void pmap_growkernel __P((vm_offset_t));
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void pmap_init __P((vm_offset_t, vm_offset_t));
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boolean_t pmap_is_modified __P((vm_offset_t pa));
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boolean_t pmap_ts_referenced __P((vm_offset_t pa));
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void pmap_kenter __P((vm_offset_t, vm_offset_t));
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void pmap_kremove __P((vm_offset_t));
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vm_offset_t pmap_map __P((vm_offset_t, vm_offset_t, vm_offset_t, int));
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void pmap_object_init_pt __P((pmap_t pmap, vm_offset_t addr,
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vm_object_t object, vm_pindex_t pindex, vm_offset_t size,
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int pagelimit));
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boolean_t pmap_page_exists __P((pmap_t, vm_offset_t));
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void pmap_page_protect __P((vm_offset_t, vm_prot_t));
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void pmap_pageable __P((pmap_t, vm_offset_t, vm_offset_t,
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boolean_t));
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vm_offset_t pmap_phys_address __P((int));
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void pmap_pinit __P((pmap_t));
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void pmap_pinit0 __P((pmap_t));
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void pmap_protect __P((pmap_t, vm_offset_t, vm_offset_t,
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vm_prot_t));
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void pmap_qenter __P((vm_offset_t, vm_page_t *, int));
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void pmap_qremove __P((vm_offset_t, int));
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void pmap_reference __P((pmap_t));
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void pmap_release __P((pmap_t));
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void pmap_remove __P((pmap_t, vm_offset_t, vm_offset_t));
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void pmap_remove_pages __P((pmap_t, vm_offset_t, vm_offset_t));
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void pmap_zero_page __P((vm_offset_t));
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void pmap_prefault __P((pmap_t pmap, vm_offset_t addra,
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vm_map_entry_t entry, vm_object_t object));
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int pmap_mincore __P((pmap_t pmap, vm_offset_t addr));
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void pmap_new_proc __P((struct proc *p));
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void pmap_dispose_proc __P((struct proc *p));
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void pmap_swapout_proc __P((struct proc *p));
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void pmap_swapin_proc __P((struct proc *p));
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void pmap_activate __P((struct proc *p));
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vm_offset_t pmap_addr_hint __P((vm_object_t obj, vm_offset_t addr, vm_size_t size));
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void pmap_init2 __P((void));
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#endif /* KERNEL */
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#endif /* _PMAP_VM_ */
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