pmap.h revision 108700 
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 108700 2003-01-05 05:30:40Z jake $
41 */
42
43#ifndef	_MACHINE_PMAP_H_
44#define	_MACHINE_PMAP_H_
45
46#include <sys/queue.h>
47#include <machine/tte.h>
48
49#define	DCACHE_COLOR_BITS	(1)
50#define	DCACHE_COLORS		(1 << DCACHE_COLOR_BITS)
51#define	DCACHE_COLOR_MASK	(DCACHE_COLORS - 1)
52#define	DCACHE_COLOR(va)	(((va) >> PAGE_SHIFT) & DCACHE_COLOR_MASK)
53#define	DCACHE_OTHER_COLOR(color) \
54	((color) ^ DCACHE_COLOR_BITS)
55
56#define	PMAP_CONTEXT_MAX	8192
57
58#define	pmap_page_is_mapped(m)	(!TAILQ_EMPTY(&(m)->md.tte_list))
59#define	pmap_resident_count(pm)	(pm->pm_stats.resident_count)
60
61typedef	struct pmap *pmap_t;
62
63struct md_page {
64	TAILQ_HEAD(, tte) tte_list;
65	struct	pmap *pmap;
66	uint32_t colors[DCACHE_COLORS];
67	int32_t	color;
68	uint32_t flags;
69};
70
71struct pmap {
72	struct	tte *pm_tsb;
73	vm_object_t pm_tsb_obj;
74	u_int	pm_active;
75	u_int	pm_context[MAXCPU];
76	struct	pmap_statistics pm_stats;
77};
78
79void	pmap_bootstrap(vm_offset_t ekva);
80void	pmap_context_rollover(void);
81vm_offset_t pmap_kextract(vm_offset_t va);
82void	pmap_kenter_flags(vm_offset_t va, vm_offset_t pa, u_long flags);
83void	pmap_kremove_flags(vm_offset_t va);
84
85int	pmap_cache_enter(vm_page_t m, vm_offset_t va);
86void	pmap_cache_remove(vm_page_t m, vm_offset_t va);
87
88int	pmap_remove_tte(struct pmap *pm1, struct pmap *pm2, struct tte *tp,
89			vm_offset_t va);
90int	pmap_protect_tte(struct pmap *pm1, struct pmap *pm2, struct tte *tp,
91			 vm_offset_t va);
92
93void	pmap_map_tsb(void);
94
95void	pmap_clear_write(vm_page_t m);
96
97#define	vtophys(va)	pmap_kextract(((vm_offset_t)(va)))
98
99extern	vm_offset_t avail_start;
100extern	vm_offset_t avail_end;
101extern	struct pmap kernel_pmap_store;
102#define	kernel_pmap	(&kernel_pmap_store)
103extern	vm_offset_t phys_avail[];
104extern	vm_offset_t virtual_avail;
105extern	vm_offset_t virtual_end;
106
107extern	vm_offset_t msgbuf_phys;
108
109static __inline int
110pmap_track_modified(pmap_t pm, vm_offset_t va)
111{
112	if (pm == kernel_pmap)
113		return ((va < kmi.clean_sva) || (va >= kmi.clean_eva));
114	else
115		return (1);
116}
117
118#ifdef PMAP_STATS
119
120SYSCTL_DECL(_debug_pmap_stats);
121
122#define	PMAP_STATS_VAR(name) \
123	static long name; \
124	SYSCTL_LONG(_debug_pmap_stats, OID_AUTO, name, CTLFLAG_RD, \
125	    &name, 0, "")
126
127#define	PMAP_STATS_INC(var) \
128	atomic_add_long(&var, 1)
129
130#else
131
132#define	PMAP_STATS_VAR(name)
133#define	PMAP_STATS_INC(var)
134
135#endif
136
137#endif /* !_MACHINE_PMAP_H_ */
138