pmap.h revision 98813 
1/*
2 * Copyright (c) 1991 Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * the Systems Programming Group of the University of Utah Computer
7 * Science Department and William Jolitz of UUNET Technologies Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *      This product includes software developed by the University of
20 *      California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 *	from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
38 *	from: @(#)pmap.h        7.4 (Berkeley) 5/12/91
39 *	from: FreeBSD: src/sys/i386/include/pmap.h,v 1.70 2000/11/30
40 * $FreeBSD: head/sys/sparc64/include/pmap.h 98813 2002-06-25 15:13:09Z jake $
41 */
42
43#ifndef	_MACHINE_PMAP_H_
44#define	_MACHINE_PMAP_H_
45
46#include <machine/tte.h>
47
48#define	DCACHE_COLOR_BITS	(1)
49#define	DCACHE_COLORS		(1 << DCACHE_COLOR_BITS)
50#define	DCACHE_COLOR_MASK	(DCACHE_COLORS - 1)
51#define	DCACHE_COLOR(va)	(((va) >> PAGE_SHIFT) & DCACHE_COLOR_MASK)
52
53#define	PMAP_CONTEXT_MAX	8192
54
55#define	PG_UNCACHEABLE		(1<<0)
56
57#define	pmap_resident_count(pm)	(pm->pm_stats.resident_count)
58
59typedef	struct pmap *pmap_t;
60
61struct md_page {
62	STAILQ_HEAD(, tte) tte_list;
63	int	colors[DCACHE_COLORS];
64	int	flags;
65};
66
67struct pmap {
68	struct	tte *pm_tsb;
69	vm_object_t pm_tsb_obj;
70	u_int	pm_active;
71	u_int	pm_context[MAXCPU];
72	struct	pmap_statistics pm_stats;
73};
74
75void	pmap_bootstrap(vm_offset_t ekva);
76void	pmap_context_rollover(void);
77vm_offset_t pmap_kextract(vm_offset_t va);
78void	pmap_kenter_flags(vm_offset_t va, vm_offset_t pa, u_long flags);
79void	pmap_kremove_flags(vm_offset_t va);
80void	pmap_qenter_flags(vm_offset_t va, vm_page_t *m, int count, u_long fl);
81
82int	pmap_cache_enter(vm_page_t m, vm_offset_t va);
83void	pmap_cache_remove(vm_page_t m, vm_offset_t va);
84
85int	pmap_remove_tte(struct pmap *pm1, struct pmap *pm2, struct tte *tp,
86			vm_offset_t va);
87int	pmap_protect_tte(struct pmap *pm1, struct pmap *pm2, struct tte *tp,
88			 vm_offset_t va);
89
90void	pmap_map_tsb(void);
91
92void	pmap_remove_all(vm_page_t m);
93
94void	pmap_clear_write(vm_page_t m);
95
96#define	vtophys(va)	pmap_kextract(((vm_offset_t) (va)))
97
98extern	vm_offset_t avail_start;
99extern	vm_offset_t avail_end;
100extern	struct pmap kernel_pmap_store;
101#define	kernel_pmap	(&kernel_pmap_store)
102extern	vm_offset_t phys_avail[];
103extern	vm_offset_t virtual_avail;
104extern	vm_offset_t virtual_end;
105extern	vm_offset_t kernel_page;
106
107extern	int pmap_pagedaemon_waken;
108
109extern	vm_offset_t msgbuf_phys;
110
111static __inline int
112pmap_track_modified(pmap_t pm, vm_offset_t va)
113{
114	if (pm == kernel_pmap)
115		return ((va < kmi.clean_sva) || (va >= kmi.clean_eva));
116	else
117		return (1);
118}
119
120#endif /* !_MACHINE_PMAP_H_ */
121