xref: /illumos-gate/usr/src/uts/sun4/sys/fpras.h (revision 7c478bd9)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef	_SYS_FPRAS_H
28 #define	_SYS_FPRAS_H
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #ifdef	__cplusplus
33 extern "C" {
34 #endif
35 
36 /*
37  * The following identify copy operations using the fpras mechanism.
38  * They are used in array indexing so keep them sequential.
39  */
40 #define	FPRAS_BCOPY	0
41 #define	FPRAS_COPYIN	1
42 #define	FPRAS_COPYOUT	2
43 #define	FPRAS_PGCOPY	3
44 #define	FPRAS_NCOPYOPS	(FPRAS_PGCOPY + 1)
45 
46 /*
47  * Identifying where fpras_failure was called from.
48  */
49 #define	FPRAS_FROMCHKFN	0
50 #define	FPRAS_FROMTRAP	1
51 
52 /*
53  * Return values from a check function.
54  */
55 #define	FPRAS_OK	0
56 #define	FPRAS_BADCALC	1
57 #define	FPRAS_BADTRAP	2
58 
59 #if !defined(_ASM)
60 
61 /*
62  * Set if an architecture/cpu combination implements fpRAS.
63  */
64 extern int fpras_implemented;
65 
66 /*
67  * Set in /etc/system to disable fpRAS mechanism at reboot.
68  * Changing this value on a live system may have no effect (eg, if an
69  * implementation checks only at startup).
70  */
71 extern int fpras_disable;
72 
73 /*
74  * Set in /etc/system to disable checking of particular copy operations.  Set
75  * bit N to disable checking of the corresponding copy operation (eg, bit 2
76  * for copyout).  Changing this value on a live system may have no effect.
77  */
78 extern int fpras_disableids;
79 
80 /*
81  * Function called from a check function to indicate an incorrect result
82  * was obtained and from trap handlers to determine if the trap was due to
83  * an fpRAS failure.  Symbol only appears for architecture/cpu combinations
84  * that implement fpRAS.
85  */
86 #pragma	weak fpras_chktrap
87 struct regs;
88 extern int fpras_chktrap(struct regs *);
89 extern int fpras_failure(int, int);
90 
91 #endif	/* !_ASM */
92 
93 #ifdef	__cplusplus
94 }
95 #endif
96 
97 #endif	/* _SYS_FPRAS_H */
98