/*
* 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 */