3 * The President and Fellows of Harvard College. All rights reserved.
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by Aaron Brown and
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * from: @(#)cache.h 8.1 (Berkeley) 6/11/93
40 * from: NetBSD: cache.h,v 1.3 2000/08/01 00:28:02 eeh Exp
45 #ifndef _MACHINE_CACHE_H_
46 #define _MACHINE_CACHE_H_
48 #include <dev/ofw/openfirm.h>
50 #define DCACHE_COLOR_BITS (1)
51 #define DCACHE_COLORS (1 << DCACHE_COLOR_BITS)
52 #define DCACHE_COLOR_MASK (DCACHE_COLORS - 1)
53 #define DCACHE_COLOR(va) (((va) >> PAGE_SHIFT) & DCACHE_COLOR_MASK)
54 #define DCACHE_OTHER_COLOR(color) \
55 ((color) ^ DCACHE_COLOR_BITS)
57 #define DC_TAG_SHIFT 2
58 #define DC_VALID_SHIFT 0
60 #define DC_TAG_BITS 28
61 #define DC_VALID_BITS 2
63 #define DC_TAG_MASK ((1 << DC_TAG_BITS) - 1)
64 #define DC_VALID_MASK ((1 << DC_VALID_BITS) - 1)
66 #define IC_TAG_SHIFT 7
67 #define IC_VALID_SHIFT 36
69 #define IC_TAG_BITS 28
70 #define IC_VALID_BITS 1
72 #define IC_TAG_MASK ((1 << IC_TAG_BITS) - 1)
73 #define IC_VALID_MASK ((1 << IC_VALID_BITS) - 1)
76 * Cache control information
79 u_int c_enabled; /* true => cache is enabled */
80 u_int ic_size; /* instruction cache */
85 u_int dc_size; /* data cache */
89 u_int ec_size; /* external cache info */
98 typedef void cache_enable_t(void);
99 typedef void cache_flush_t(void);
100 typedef void dcache_page_inval_t(vm_paddr_t pa);
101 typedef void icache_page_inval_t(vm_paddr_t pa);
103 void cache_init(phandle_t node);
105 cache_enable_t cheetah_cache_enable;
106 cache_flush_t cheetah_cache_flush;
107 dcache_page_inval_t cheetah_dcache_page_inval;
108 icache_page_inval_t cheetah_icache_page_inval;
110 cache_enable_t spitfire_cache_enable;
111 cache_flush_t spitfire_cache_flush;
112 dcache_page_inval_t spitfire_dcache_page_inval;
113 icache_page_inval_t spitfire_icache_page_inval;
115 extern cache_enable_t *cache_enable;
116 extern cache_flush_t *cache_flush;
117 extern dcache_page_inval_t *dcache_page_inval;
118 extern icache_page_inval_t *icache_page_inval;
120 extern struct cacheinfo cache;
124 #endif /* !_MACHINE_CACHE_H_ */