tsb.h revision 88649 
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 88649 2001-12-29 08:15:43Z jake $
30 */
31
32#ifndef	_MACHINE_TSB_H_
33#define	_MACHINE_TSB_H_
34
35#define	TSB_BUCKET_SHIFT		(2)
36#define	TSB_BUCKET_SIZE			(1 << TSB_BUCKET_SHIFT)
37#define	TSB_BUCKET_ADDRESS_BITS \
38	(PAGE_SHIFT_8K - TSB_BUCKET_SHIFT - TTE_SHIFT)
39#define	TSB_BUCKET_MASK			((1 << TSB_BUCKET_ADDRESS_BITS) - 1)
40
41#define	TSB_KERNEL_SIZE \
42	((KVA_PAGES * PAGE_SIZE_4M) / sizeof(struct tte))
43#define	TSB_KERNEL_MASK 		(TSB_KERNEL_SIZE - 1)
44#define	TSB_KERNEL_VA_MASK		(TSB_KERNEL_MASK << TTE_SHIFT)
45
46extern struct tte *tsb_kernel;
47extern vm_offset_t tsb_kernel_phys;
48
49static __inline struct tte *
50tsb_vpntobucket(pmap_t pm, vm_offset_t vpn)
51{
52	return (&pm->pm_tsb[(vpn & TSB_BUCKET_MASK) << TSB_BUCKET_SHIFT]);
53}
54
55static __inline struct tte *
56tsb_vtobucket(pmap_t pm, vm_offset_t va)
57{
58	return (tsb_vpntobucket(pm, va >> PAGE_SHIFT));
59}
60
61static __inline struct tte *
62tsb_kvpntotte(vm_offset_t vpn)
63{
64	return (&tsb_kernel[vpn & TSB_KERNEL_MASK]);
65}
66
67static __inline struct tte *
68tsb_kvtotte(vm_offset_t va)
69{
70	return (tsb_kvpntotte(va >> PAGE_SHIFT));
71}
72
73struct	tte *tsb_tte_lookup(pmap_t pm, vm_offset_t va);
74void	tsb_tte_remove(struct tte *stp);
75struct	tte *tsb_tte_enter(pmap_t pm, vm_page_t m, vm_offset_t va,
76			   struct tte tte);
77void	tsb_tte_local_remove(struct tte *tp);
78
79#endif /* !_MACHINE_TSB_H_ */
80