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