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 * $FreeBSD$
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			(1 << TSB_BSHIFT)
39#define	TSB_BUCKET_SHIFT		(2)
40#define	TSB_BUCKET_SIZE			(1 << TSB_BUCKET_SHIFT)
41#define	TSB_BUCKET_ADDRESS_BITS \
42	(TSB_BSHIFT - TSB_BUCKET_SHIFT - TTE_SHIFT)
43#define	TSB_BUCKET_MASK			((1 << TSB_BUCKET_ADDRESS_BITS) - 1)
44
45#ifndef LOCORE
46
47#define	TSB_SIZE			(TSB_BSIZE / sizeof(struct tte))
48
49extern struct tte *tsb_kernel;
50extern vm_size_t tsb_kernel_mask;
51extern vm_size_t tsb_kernel_size;
52extern vm_paddr_t tsb_kernel_phys;
53
54static __inline struct tte *
55tsb_vpntobucket(pmap_t pm, vm_offset_t vpn)
56{
57
58	return (&pm->pm_tsb[(vpn & TSB_BUCKET_MASK) << TSB_BUCKET_SHIFT]);
59}
60
61static __inline struct tte *
62tsb_vtobucket(pmap_t pm, u_long sz, vm_offset_t va)
63{
64
65	return (tsb_vpntobucket(pm, va >> TTE_PAGE_SHIFT(sz)));
66}
67
68static __inline struct tte *
69tsb_kvpntotte(vm_offset_t vpn)
70{
71
72	return (&tsb_kernel[vpn & tsb_kernel_mask]);
73}
74
75static __inline struct tte *
76tsb_kvtotte(vm_offset_t va)
77{
78
79	return (tsb_kvpntotte(va >> PAGE_SHIFT));
80}
81
82typedef int (tsb_callback_t)(struct pmap *, struct pmap *, struct tte *,
83	    vm_offset_t);
84
85struct	tte *tsb_tte_lookup(pmap_t pm, vm_offset_t va);
86void	tsb_tte_remove(struct tte *stp);
87struct	tte *tsb_tte_enter(pmap_t pm, vm_page_t m, vm_offset_t va, u_long sz,
88	    u_long data);
89void	tsb_tte_local_remove(struct tte *tp);
90void	tsb_foreach(pmap_t pm1, pmap_t pm2, vm_offset_t start, vm_offset_t end,
91	    tsb_callback_t *callback);
92
93#endif /* !LOCORE */
94
95#endif /* !_MACHINE_TSB_H_ */
96