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 38 typedef 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 */ 82