1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Berkeley Software Design Inc's name may not be used to endorse or
15 * promote products derived from this software without specific prior
16 * written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * from: BSDI: pmap.v9.h,v 1.10.2.6 1999/08/23 22:18:44 cp Exp
31 * $FreeBSD: stable/12/sys/sparc64/include/tsb.h 326262 2017-11-27 15:10:39Z pfg $
32 */
33
34 #ifndef _MACHINE_TSB_H_
35 #define _MACHINE_TSB_H_
36
37 #define TSB_PAGES_SHIFT (4)
38 #define TSB_PAGES (1 << TSB_PAGES_SHIFT)
39 #define TSB_BSHIFT (TSB_PAGES_SHIFT + PAGE_SHIFT)
40 #define TSB_BSIZE (1 << TSB_BSHIFT)
41 #define TSB_BUCKET_SHIFT (2)
42 #define TSB_BUCKET_SIZE (1 << TSB_BUCKET_SHIFT)
43 #define TSB_BUCKET_ADDRESS_BITS \
44 (TSB_BSHIFT - TSB_BUCKET_SHIFT - TTE_SHIFT)
45 #define TSB_BUCKET_MASK ((1 << TSB_BUCKET_ADDRESS_BITS) - 1)
46
47 #ifndef LOCORE
48
49 #define TSB_SIZE (TSB_BSIZE / sizeof(struct tte))
50
51 extern struct tte *tsb_kernel;
52 extern vm_size_t tsb_kernel_mask;
53 extern vm_size_t tsb_kernel_size;
54 extern vm_paddr_t tsb_kernel_phys;
55
56 static __inline struct tte *
tsb_vpntobucket(pmap_t pm,vm_offset_t vpn)57 tsb_vpntobucket(pmap_t pm, vm_offset_t vpn)
58 {
59
60 return (&pm->pm_tsb[(vpn & TSB_BUCKET_MASK) << TSB_BUCKET_SHIFT]);
61 }
62
63 static __inline struct tte *
tsb_vtobucket(pmap_t pm,u_long sz,vm_offset_t va)64 tsb_vtobucket(pmap_t pm, u_long sz, vm_offset_t va)
65 {
66
67 return (tsb_vpntobucket(pm, va >> TTE_PAGE_SHIFT(sz)));
68 }
69
70 static __inline struct tte *
tsb_kvpntotte(vm_offset_t vpn)71 tsb_kvpntotte(vm_offset_t vpn)
72 {
73
74 return (&tsb_kernel[vpn & tsb_kernel_mask]);
75 }
76
77 static __inline struct tte *
tsb_kvtotte(vm_offset_t va)78 tsb_kvtotte(vm_offset_t va)
79 {
80
81 return (tsb_kvpntotte(va >> PAGE_SHIFT));
82 }
83
84 typedef int (tsb_callback_t)(struct pmap *, struct pmap *, struct tte *,
85 vm_offset_t);
86
87 struct tte *tsb_tte_lookup(pmap_t pm, vm_offset_t va);
88 void tsb_tte_remove(struct tte *stp);
89 struct tte *tsb_tte_enter(pmap_t pm, vm_page_t m, vm_offset_t va, u_long sz,
90 u_long data);
91 void tsb_tte_local_remove(struct tte *tp);
92 void tsb_foreach(pmap_t pm1, pmap_t pm2, vm_offset_t start, vm_offset_t end,
93 tsb_callback_t *callback);
94
95 #endif /* !LOCORE */
96
97 #endif /* !_MACHINE_TSB_H_ */
98