1 /* $NetBSD: cache_r3k.c,v 1.7 2016/07/11 16:15:36 matt Exp $ */
2
3 /*
4 * Copyright 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <sys/cdefs.h>
39 __KERNEL_RCSID(0, "$NetBSD: cache_r3k.c,v 1.7 2016/07/11 16:15:36 matt Exp $");
40
41 #include <sys/param.h>
42
43 #include <mips/cpuregs.h>
44 #include <mips/cache.h>
45 #include <mips/cache_r3k.h>
46
47 /*
48 * Cache operations for R3000-style caches:
49 *
50 * - Direct-mapped
51 * - Write-through
52 * - Physically indexed, physically tagged
53 */
54
55 #define round_line(x) (((x) + 31) & ~31)
56 #define trunc_line(x) ((x) & ~31)
57
58 void
r3k_icache_sync_all(void)59 r3k_icache_sync_all(void)
60 {
61 vaddr_t va = MIPS_PHYS_TO_KSEG0(0);
62 vaddr_t eva = va + mips_cache_info.mci_picache_size;
63
64 r3k_picache_do_inv(va, eva);
65 }
66
67 void
r3k_icache_sync_range(register_t va,vsize_t size)68 r3k_icache_sync_range(register_t va, vsize_t size)
69 {
70 vaddr_t eva = round_line(va + size);
71
72 va = trunc_line(va);
73
74 if ((eva - va) >= mips_cache_info.mci_picache_size) {
75 r3k_icache_sync_all();
76 return;
77 }
78
79 r3k_picache_do_inv(va, eva);
80 }
81
82 void
r3k_pdcache_wbinv_all(void)83 r3k_pdcache_wbinv_all(void)
84 {
85 vaddr_t va = MIPS_PHYS_TO_KSEG0(0);
86 vaddr_t eva = va + mips_cache_info.mci_pdcache_size;
87
88 /* Cache is write-through. */
89
90 r3k_pdcache_do_inv(va, eva);
91 }
92
93 void
r3k_pdcache_inv_range(register_t va,vsize_t size)94 r3k_pdcache_inv_range(register_t va, vsize_t size)
95 {
96 vaddr_t eva = round_line(va + size);
97
98 va = trunc_line(va);
99
100 if ((eva - va) >= mips_cache_info.mci_pdcache_size) {
101 r3k_pdcache_wbinv_all();
102 return;
103 }
104
105 r3k_pdcache_do_inv(va, eva);
106 }
107
108 void
r3k_pdcache_wb_range(register_t va,vsize_t size)109 r3k_pdcache_wb_range(register_t va, vsize_t size)
110 {
111
112 /* Cache is write-though. */
113 }
114
115 #undef round_line
116 #undef trunc_line
117