Subversion Repositories HelenOS

Rev

Rev 2252 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2008 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2006 Jakub Jermar
2008 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
#include <arch/arch.h>
30
 
2076 jermar 31
#define DCACHE_SIZE		(16 * 1024)
2016 jermar 32
#define DCACHE_LINE_SIZE	32	
2008 jermar 33
 
2076 jermar 34
#define DCACHE_TAG_SHIFT	2
35
 
36
.register %g2, #scratch
37
.register %g3, #scratch
38
 
39
/** Flush the whole D-cache. */
2008 jermar 40
.global dcache_flush
41
dcache_flush:
42
	set (DCACHE_SIZE - DCACHE_LINE_SIZE), %g1
43
	stxa %g0, [%g1] ASI_DCACHE_TAG
44
0:	membar #Sync
45
	subcc %g1, DCACHE_LINE_SIZE, %g1
46
	bnz,pt %xcc, 0b
47
	stxa %g0, [%g1] ASI_DCACHE_TAG
2252 jermar 48
	membar #Sync			
2008 jermar 49
	retl
2252 jermar 50
	! beware SF Erratum #51, do not put the MEMBAR here
51
	nop				
2008 jermar 52
 
2076 jermar 53
/** Flush only D-cache lines of one virtual color.
54
 *
55
 * @param o0	Virtual color to be flushed.
56
 */
57
.global dcache_flush_color
58
dcache_flush_color:
59
	mov (DCACHE_SIZE / DCACHE_LINE_SIZE) / 2, %g1
60
	set DCACHE_SIZE / 2, %g2
61
	sllx %g2, %o0, %g2
62
	sub %g2, DCACHE_LINE_SIZE, %g2
63
0:	stxa %g0, [%g2] ASI_DCACHE_TAG
64
	membar #Sync
65
	subcc %g1, 1, %g1
66
	bnz,pt %xcc, 0b
67
	sub %g2, DCACHE_LINE_SIZE, %g2
68
	retl
69
	nop
70
 
71
/** Flush only D-cache lines of one virtual color and one tag.
72
 *
73
 * @param o0	Virtual color to lookup the tag.
74
 * @param o1	Tag of the cachelines to be flushed.
75
 */
76
.global dcache_flush_tag
77
dcache_flush_tag:
78
	mov (DCACHE_SIZE / DCACHE_LINE_SIZE) / 2, %g1
79
	set DCACHE_SIZE / 2, %g2
80
	sllx %g2, %o0, %g2
81
	sub %g2, DCACHE_LINE_SIZE, %g2
82
0:	ldxa [%g2] ASI_DCACHE_TAG, %g3
83
	srlx %g3, DCACHE_TAG_SHIFT, %g3
84
	cmp %g3, %o1
85
	bnz 1f
86
	nop
87
	stxa %g0, [%g2] ASI_DCACHE_TAG
88
	membar #Sync
89
1:	subcc %g1, 1, %g1
90
	bnz,pt %xcc, 0b
91
	sub %g2, DCACHE_LINE_SIZE, %g2
92
	retl
93
	nop