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
58void
59r3k_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
67void
68r3k_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
82void
83r3k_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
93void
94r3k_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
108void
109r3k_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