2 * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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
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
28 * from: BSDI: pmap.v9.h,v 1.10.2.6 1999/08/23 22:18:44 cp Exp
32 #ifndef _MACHINE_TSB_H_
33 #define _MACHINE_TSB_H_
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)
47 #define TSB_SIZE (TSB_BSIZE / sizeof(struct tte))
49 extern struct tte *tsb_kernel;
50 extern vm_size_t tsb_kernel_mask;
51 extern vm_size_t tsb_kernel_size;
52 extern vm_paddr_t tsb_kernel_phys;
54 static __inline struct tte *
55 tsb_vpntobucket(pmap_t pm, vm_offset_t vpn)
58 return (&pm->pm_tsb[(vpn & TSB_BUCKET_MASK) << TSB_BUCKET_SHIFT]);
61 static __inline struct tte *
62 tsb_vtobucket(pmap_t pm, u_long sz, vm_offset_t va)
65 return (tsb_vpntobucket(pm, va >> TTE_PAGE_SHIFT(sz)));
68 static __inline struct tte *
69 tsb_kvpntotte(vm_offset_t vpn)
72 return (&tsb_kernel[vpn & tsb_kernel_mask]);
75 static __inline struct tte *
76 tsb_kvtotte(vm_offset_t va)
79 return (tsb_kvpntotte(va >> PAGE_SHIFT));
82 typedef int (tsb_callback_t)(struct pmap *, struct pmap *, struct tte *,
85 struct tte *tsb_tte_lookup(pmap_t pm, vm_offset_t va);
86 void tsb_tte_remove(struct tte *stp);
87 struct tte *tsb_tte_enter(pmap_t pm, vm_page_t m, vm_offset_t va, u_long sz,
89 void tsb_tte_local_remove(struct tte *tp);
90 void tsb_foreach(pmap_t pm1, pmap_t pm2, vm_offset_t start, vm_offset_t end,
91 tsb_callback_t *callback);
95 #endif /* !_MACHINE_TSB_H_ */