tsb.h revision 102040 
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/tsb.h 102040 2002-08-18 02:09:27Z jake $
30 */
31
32#ifndef	_MACHINE_TSB_H_
33#define	_MACHINE_TSB_H_
34
35#define	TSB_PAGES_SHIFT			(4)
36#define	TSB_PAGES			(1 << TSB_PAGES_SHIFT)
37#define	TSB_BSHIFT			(TSB_PAGES_SHIFT + PAGE_SHIFT)
38#define	TSB_BSIZE			(1UL << TSB_BSHIFT)
39#define	TSB_SIZE			(TSB_BSIZE / sizeof(struct tte))
40#define	TSB_BUCKET_SHIFT		(2)
41#define	TSB_BUCKET_SIZE			(1 << TSB_BUCKET_SHIFT)
42#define	TSB_BUCKET_ADDRESS_BITS \
43	(TSB_BSHIFT - TSB_BUCKET_SHIFT - TTE_SHIFT)
44#define	TSB_BUCKET_MASK			((1 << TSB_BUCKET_ADDRESS_BITS) - 1)
45
46extern struct tte *tsb_kernel;
47extern vm_size_t tsb_kernel_mask;
48extern vm_size_t tsb_kernel_size;
49extern vm_offset_t tsb_kernel_phys;
50
51static __inline struct tte *
52tsb_vpntobucket(pmap_t pm, vm_offset_t vpn)
53{
54	return (&pm->pm_tsb[(vpn & TSB_BUCKET_MASK) << TSB_BUCKET_SHIFT]);
55}
56
57static __inline struct tte *
58tsb_vtobucket(pmap_t pm, u_long sz, vm_offset_t va)
59{
60	return (tsb_vpntobucket(pm, va >> TTE_PAGE_SHIFT(sz)));
61}
62
63static __inline struct tte *
64tsb_kvpntotte(vm_offset_t vpn)
65{
66	return (&tsb_kernel[vpn & tsb_kernel_mask]);
67}
68
69static __inline struct tte *
70tsb_kvtotte(vm_offset_t va)
71{
72	return (tsb_kvpntotte(va >> PAGE_SHIFT));
73}
74
75typedef int (tsb_callback_t)(struct pmap *, struct pmap *, struct tte *,
76			     vm_offset_t);
77
78struct	tte *tsb_tte_lookup(pmap_t pm, vm_offset_t va);
79void	tsb_tte_remove(struct tte *stp);
80struct	tte *tsb_tte_enter(pmap_t pm, vm_page_t m, vm_offset_t va, u_long sz,
81			   u_long data);
82void	tsb_tte_local_remove(struct tte *tp);
83void	tsb_foreach(pmap_t pm1, pmap_t pm2, vm_offset_t start, vm_offset_t end,
84		    tsb_callback_t *callback);
85
86#endif /* !_MACHINE_TSB_H_ */
87