tte.h revision 84182 
1/*-
2 * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 3. Berkeley Software Design Inc's name may not be used to endorse or
13 *    promote products derived from this software without specific prior
14 *    written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 *	from: BSDI: pmap.v9.h,v 1.10.2.6 1999/08/23 22:18:44 cp Exp
29 * $FreeBSD: head/sys/sparc64/include/tte.h 84182 2001-09-30 18:55:05Z jake $
30 */
31
32#ifndef	_MACHINE_TTE_H_
33#define	_MACHINE_TTE_H_
34
35#include <machine/atomic.h>
36
37#define	TTE_SHIFT	4
38#define	STTE_SHIFT	5
39
40#define	TT_CTX_SHIFT	(48)
41#define	TT_VA_SHIFT	(22)
42#define	TT_VPN_SHIFT	(9)
43
44#define	TT_CTX_SIZE	(13)
45#define	TT_VA_SIZE	(42)
46
47#define	TT_CTX_MASK	((1L << TT_CTX_SIZE) - 1)
48#define	TT_VA_MASK	((1L << TT_VA_SIZE) - 1)
49
50#define	TT_G		(1L << 63)
51#define	TT_CTX(ctx)	(((u_long)(ctx) & TT_CTX_MASK) << TT_CTX_SHIFT)
52#define	TT_VA(va)	((u_long)(va) >> TT_VA_SHIFT)
53
54#define	TD_SIZE_SHIFT	(61)
55#define	TD_SOFT2_SHIFT	(50)
56#define	TD_DIAG_SHIFT	(41)
57#define	TD_PA_SHIFT	(13)
58#define	TD_SOFT_SHIFT	(7)
59
60#define	TD_SIZE_SIZE	(2)
61#define	TD_SOFT2_SIZE	(9)
62#define	TD_DIAG_SIZE	(9)
63#define	TD_PA_SIZE	(28)
64#define	TD_SOFT_SIZE	(6)
65
66#define	TD_SIZE_MASK	(((1L << TD_SIZE_SIZE) - 1) << TD_SIZE_SHIFT)
67#define	TD_SOFT2_MASK	(((1L << TD_SOFT2_SIZE) - 1) << TD_SOFT2_SHIFT)
68#define	TD_DIAG_MASK	(((1L << TD_DIAG_SIZE) - 1) << TD_DIAG_SHIFT)
69#define	TD_PA_MASK	(((1L << TD_PA_SIZE) - 1) << TD_PA_SHIFT)
70#define	TD_SOFT_MASK	(((1L << TD_SOFT_SIZE) - 1) << TD_SOFT_SHIFT)
71
72#define	TD_VA_LOW_SHIFT	TD_SOFT2_SHIFT
73#define	TD_VA_LOW_MASK	TD_SOFT2_MASK
74
75#define	TS_EXEC		(1L << 4)
76#define	TS_INIT		(1L << 3)
77#define	TS_MNG		(1L << 2)
78#define	TS_REF		(1L << 1)
79#define	TS_W		(1L << 0)
80
81#define	TD_V		(1L << 63)
82#define	TD_8K		(0L << TD_SIZE_SHIFT)
83#define	TD_64K		(1L << TD_SIZE_SHIFT)
84#define	TD_512K		(2L << TD_SIZE_SHIFT)
85#define	TD_4M		(3L << TD_SIZE_SHIFT)
86#define	TD_NFO		(1L << 60)
87#define	TD_IE		(1L << 59)
88#define	TD_VPN_LOW(vpn)	((vpn << TD_SOFT2_SHIFT) & TD_SOFT2_MASK)
89#define	TD_VA_LOW(va)	(TD_VPN_LOW((va) >> PAGE_SHIFT))
90#define	TD_PA(pa)	((pa) & TD_PA_MASK)
91#define	TD_EXEC		(TS_EXEC << TD_SOFT_SHIFT)
92#define	TD_INIT		(TS_INIT << TD_SOFT_SHIFT)
93#define	TD_MNG		(TS_MNG << TD_SOFT_SHIFT)
94#define	TD_REF		(TS_REF << TD_SOFT_SHIFT)
95#define	TD_SW		(TS_W << TD_SOFT_SHIFT)
96#define	TD_L		(1L << 6)
97#define	TD_CP		(1L << 5)
98#define	TD_CV		(1L << 4)
99#define	TD_E		(1L << 3)
100#define	TD_P		(1L << 2)
101#define	TD_W		(1L << 1)
102#define	TD_G		(1L << 0)
103
104#define	TT_GET_CTX(tag)	(((tag) >> TT_CTX_SHIFT) & TT_CTX_MASK)
105
106struct tte {
107	u_long	tte_tag;
108	u_long	tte_data;
109};
110
111struct stte {
112	struct	tte st_tte;
113	vm_offset_t st_next;
114	vm_offset_t st_prev;
115};
116
117static __inline vm_offset_t
118tte_get_vpn(struct tte tte)
119{
120	return (((tte.tte_tag & TT_VA_MASK) << TT_VPN_SHIFT) |
121	    ((tte.tte_data & TD_VA_LOW_MASK) >> TD_VA_LOW_SHIFT));
122}
123
124static __inline vm_offset_t
125tte_get_va(struct tte tte)
126{
127	return (tte_get_vpn(tte) << PAGE_SHIFT);
128}
129
130static __inline void
131tte_invalidate(struct tte *tp)
132{
133	atomic_clear_long(&tp->tte_data, TD_V);
134}
135
136static __inline int
137tte_match(struct tte tte, vm_offset_t va)
138{
139	return ((tte.tte_data & TD_V) != 0 &&
140	    ((tte.tte_tag ^ TT_VA(va)) & TT_VA_MASK) == 0 &&
141	    ((tte.tte_data ^ TD_VA_LOW(va)) & TD_VA_LOW_MASK) == 0);
142}
143
144#endif /* !_MACHINE_TTE_H_ */
145