aboutsummaryrefslogtreecommitdiff
path: root/arch/ia64/sn/include/ioerror.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ia64/sn/include/ioerror.h')
-rw-r--r--arch/ia64/sn/include/ioerror.h81
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/ia64/sn/include/ioerror.h b/arch/ia64/sn/include/ioerror.h
new file mode 100644
index 000000000000..e68f2b0789a7
--- /dev/null
+++ b/arch/ia64/sn/include/ioerror.h
@@ -0,0 +1,81 @@
+/*
+ * 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 */