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/arch/ia64/sn/include/ioerror.h

https://bitbucket.org/evzijst/gittest
C Header | 81 lines | 42 code | 5 blank | 34 comment | 2 complexity | aa4ca221cfdf685a36ab68aca7f25244 MD5 | raw file
 1/*
 2 * This file is subject to the terms and conditions of the GNU General Public
 3 * License.  See the file "COPYING" in the main directory of this archive
 4 * for more details.
 5 *
 6 * Copyright (C) 1992 - 1997, 2000-2003 Silicon Graphics, Inc. All rights reserved.
 7 */
 8#ifndef _ASM_IA64_SN_IOERROR_H
 9#define _ASM_IA64_SN_IOERROR_H
10
11/*
12 * IO error structure.
13 *
14 * This structure would expand to hold the information retrieved from
15 * all IO related error registers.
16 *
17 * This structure is defined to hold all system specific
18 * information related to a single error.
19 *
20 * This serves a couple of purpose.
21 *      - Error handling often involves translating one form of address to other
22 *        form. So, instead of having different data structures at each level,
23 *        we have a single structure, and the appropriate fields get filled in
24 *        at each layer.
25 *      - This provides a way to dump all error related information in any layer
26 *        of erorr handling (debugging aid).
27 *
28 * A second possibility is to allow each layer to define its own error
29 * data structure, and fill in the proper fields. This has the advantage
30 * of isolating the layers.
31 * A big concern is the potential stack usage (and overflow), if each layer
32 * defines these structures on stack (assuming we don't want to do kmalloc.
33 *
34 * Any layer wishing to pass extra information to a layer next to it in
35 * error handling hierarchy, can do so as a separate parameter.
36 */
37
38typedef struct io_error_s {
39    /* Bit fields indicating which structure fields are valid */
40    union {
41	struct {
42	    unsigned                ievb_errortype:1;
43	    unsigned                ievb_widgetnum:1;
44	    unsigned                ievb_widgetdev:1;
45	    unsigned                ievb_srccpu:1;
46	    unsigned                ievb_srcnode:1;
47	    unsigned                ievb_errnode:1;
48	    unsigned                ievb_sysioaddr:1;
49	    unsigned                ievb_xtalkaddr:1;
50	    unsigned                ievb_busspace:1;
51	    unsigned                ievb_busaddr:1;
52	    unsigned                ievb_vaddr:1;
53	    unsigned                ievb_memaddr:1;
54	    unsigned		    ievb_epc:1;
55	    unsigned		    ievb_ef:1;
56	    unsigned		    ievb_tnum:1;
57	} iev_b;
58	unsigned                iev_a;
59    } ie_v;
60
61    short                   ie_errortype;	/* error type: extra info about error */
62    short                   ie_widgetnum;	/* Widget number that's in error */
63    short                   ie_widgetdev;	/* Device within widget in error */
64    cpuid_t                 ie_srccpu;	/* CPU on srcnode generating error */
65    cnodeid_t               ie_srcnode;		/* Node which caused the error   */
66    cnodeid_t               ie_errnode;		/* Node where error was noticed  */
67    iopaddr_t               ie_sysioaddr;	/* Sys specific IO address       */
68    iopaddr_t               ie_xtalkaddr;	/* Xtalk (48bit) addr of Error   */
69    iopaddr_t               ie_busspace;	/* Bus specific address space    */
70    iopaddr_t               ie_busaddr;		/* Bus specific address          */
71    caddr_t                 ie_vaddr;	/* Virtual address of error      */
72    iopaddr_t               ie_memaddr;		/* Physical memory address       */
73    caddr_t		    ie_epc;		/* pc when error reported	 */
74    caddr_t		    ie_ef;		/* eframe when error reported	 */
75    short		    ie_tnum;		/* Xtalk TNUM field */
76} ioerror_t;
77
78#define	IOERROR_INIT(e)		do { (e)->ie_v.iev_a = 0; } while (0)
79#define	IOERROR_SETVALUE(e,f,v)	do { (e)->ie_ ## f = (v); (e)->ie_v.iev_b.ievb_ ## f = 1; } while (0)
80
81#endif /* _ASM_IA64_SN_IOERROR_H */