| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |