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81 lines
3.5 KiB
81 lines
3.5 KiB
/* |
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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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