2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
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11 * 2. Redistributions in binary form must reproduce the above copyright
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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
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)
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30 * from: BSDI: pmap.v9.h,v 1.10.2.6 1999/08/23 22:18:44 cp Exp
34 #ifndef _MACHINE_TSB_H_
35 #define _MACHINE_TSB_H_
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)
49 #define TSB_SIZE (TSB_BSIZE / sizeof(struct tte))
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;
56 static __inline struct tte *
57 tsb_vpntobucket(pmap_t pm, vm_offset_t vpn)
60 return (&pm->pm_tsb[(vpn & TSB_BUCKET_MASK) << TSB_BUCKET_SHIFT]);
63 static __inline struct tte *
64 tsb_vtobucket(pmap_t pm, u_long sz, vm_offset_t va)
67 return (tsb_vpntobucket(pm, va >> TTE_PAGE_SHIFT(sz)));
70 static __inline struct tte *
71 tsb_kvpntotte(vm_offset_t vpn)
74 return (&tsb_kernel[vpn & tsb_kernel_mask]);
77 static __inline struct tte *
78 tsb_kvtotte(vm_offset_t va)
81 return (tsb_kvpntotte(va >> PAGE_SHIFT));
84 typedef int (tsb_callback_t)(struct pmap *, struct pmap *, struct tte *,
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,
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);
97 #endif /* !_MACHINE_TSB_H_ */