xref: /titanic_51/usr/src/uts/sun4u/sunfire/ml/ac_asm.s (revision f808c858fa61e7769218966759510a8b1190dfcf)
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 1998 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <sys/param.h>
30#include <sys/errno.h>
31#include <sys/asm_linkage.h>
32#include <sys/vtrace.h>
33#include <sys/machthread.h>
34#include <sys/clock.h>
35#include <sys/asi.h>
36#include <sys/fsr.h>
37#include <sys/privregs.h>
38#include <sys/pte.h>
39#include <sys/mmu.h>
40#include <sys/spitregs.h>
41
42#if defined(lint)
43
44#else	/* lint */
45#include "assym.h"
46#endif	/* lint */
47
48#define	TT_HSM	0x99
49
50#if defined(lint)
51/* ARGSUSED */
52void
53ac_blkcopy(caddr_t src, caddr_t dst, u_int linecount, u_int linesize)
54{}
55#else /* !lint */
56!
57! Move a single cache line of data.  Survive UE and CE on the read
58!
59! i0 = src va
60! i1 = dst va
61! i2 = line count
62! i3 = line size
63! i4 = cache of fpu state
64!
65	ENTRY(ac_blkcopy)
66
67	! TODO: can we safely SAVE here
68	save	%sp, -SA(MINFRAME + 2*64), %sp
69
70	! XXX do we need to save the state of the fpu?
71	rd	%fprs, %i4
72	btst	(FPRS_DU|FPRS_DL|FPRS_FEF), %i4
73
74	! always enable FPU
75	wr	%g0, FPRS_FEF, %fprs
76
77	bz,a	1f
78	 nop
79
80	! save in-use fpregs on stack
81	membar	#Sync
82	add	%fp, STACK_BIAS - 81, %o2
83	and	%o2, -64, %o2
84	stda	%d0, [%o2]ASI_BLK_P
85	membar	#Sync
86
871:
88	brz,pn	%i2, 2f				! while (linecount) {
89	 nop
90	ldda	[%i0]ASI_BLK_P, %d0		! *dst = *src;
91	membar	#Sync
92	stda	%d0, [%i1]ASI_BLK_COMMIT_P
93	membar	#Sync
94
95	add	%i0, %i3, %i0			! dst++, src++;
96	add	%i1, %i3, %i1
97
98	ba	1b				! linecount-- }
99	 dec	%i2
100
1012:
102	membar	#Sync
103
104	! restore fp to the way we got it
105	btst	(FPRS_DU|FPRS_DL|FPRS_FEF), %i4
106	bz,a	3f
107	 nop
108
109	! restore fpregs from stack
110	add	%fp, STACK_BIAS - 81, %o2
111	and	%o2, -64, %o2
112	ldda	[%o2]ASI_BLK_P, %d0
113	membar	#Sync
114
1153:
116	wr	%g0, %i4, %fprs			! fpu back to the way it was
117	ret
118	 restore
119	SET_SIZE(ac_blkcopy)
120#endif /* lint */
121