82 lines
3.5 KiB
C
82 lines
3.5 KiB
C
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1992 - 1997, 2000-2003 Silicon Graphics, Inc. All rights reserved.
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*/
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#ifndef _ASM_IA64_SN_IOERROR_H
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#define _ASM_IA64_SN_IOERROR_H
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/*
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* IO error structure.
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*
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* This structure would expand to hold the information retrieved from
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* all IO related error registers.
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*
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* This structure is defined to hold all system specific
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* information related to a single error.
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*
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* This serves a couple of purpose.
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* - Error handling often involves translating one form of address to other
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* form. So, instead of having different data structures at each level,
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* we have a single structure, and the appropriate fields get filled in
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* at each layer.
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* - This provides a way to dump all error related information in any layer
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* of erorr handling (debugging aid).
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*
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* A second possibility is to allow each layer to define its own error
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* data structure, and fill in the proper fields. This has the advantage
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* of isolating the layers.
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* A big concern is the potential stack usage (and overflow), if each layer
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* defines these structures on stack (assuming we don't want to do kmalloc.
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*
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* Any layer wishing to pass extra information to a layer next to it in
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* error handling hierarchy, can do so as a separate parameter.
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*/
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typedef struct io_error_s {
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/* Bit fields indicating which structure fields are valid */
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union {
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struct {
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unsigned ievb_errortype:1;
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unsigned ievb_widgetnum:1;
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unsigned ievb_widgetdev:1;
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unsigned ievb_srccpu:1;
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unsigned ievb_srcnode:1;
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unsigned ievb_errnode:1;
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unsigned ievb_sysioaddr:1;
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unsigned ievb_xtalkaddr:1;
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unsigned ievb_busspace:1;
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unsigned ievb_busaddr:1;
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unsigned ievb_vaddr:1;
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unsigned ievb_memaddr:1;
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unsigned ievb_epc:1;
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unsigned ievb_ef:1;
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unsigned ievb_tnum:1;
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} iev_b;
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unsigned iev_a;
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} ie_v;
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short ie_errortype; /* error type: extra info about error */
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short ie_widgetnum; /* Widget number that's in error */
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short ie_widgetdev; /* Device within widget in error */
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cpuid_t ie_srccpu; /* CPU on srcnode generating error */
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cnodeid_t ie_srcnode; /* Node which caused the error */
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cnodeid_t ie_errnode; /* Node where error was noticed */
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iopaddr_t ie_sysioaddr; /* Sys specific IO address */
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iopaddr_t ie_xtalkaddr; /* Xtalk (48bit) addr of Error */
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iopaddr_t ie_busspace; /* Bus specific address space */
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iopaddr_t ie_busaddr; /* Bus specific address */
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caddr_t ie_vaddr; /* Virtual address of error */
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iopaddr_t ie_memaddr; /* Physical memory address */
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caddr_t ie_epc; /* pc when error reported */
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caddr_t ie_ef; /* eframe when error reported */
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short ie_tnum; /* Xtalk TNUM field */
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} ioerror_t;
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#define IOERROR_INIT(e) do { (e)->ie_v.iev_a = 0; } while (0)
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#define IOERROR_SETVALUE(e,f,v) do { (e)->ie_ ## f = (v); (e)->ie_v.iev_b.ievb_ ## f = 1; } while (0)
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#endif /* _ASM_IA64_SN_IOERROR_H */
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