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30 .Nd device driver for the ACPI WDAT based watchdog interrupt timer
32 To compile this driver into the kernel,
33 place the following line in your
34 kernel configuration file:
35 .Bd -ragged -offset indent
39 Alternatively, to load the driver as a
40 module at boot time, place the following line in
42 .Bd -literal -offset indent
50 support for the watchdog interrupt timer in ACPI WDAT (Watchdog Action Table).
52 Since WDAT itself is an abstraction for the real hardware such as ICH WDT, it
53 must be noted that only one driver can be used at a time, either the real
54 hardware specific driver or this driver.
56 The following read-only
58 variables are available:
59 .Bl -tag -width indent
60 .It Va dev.wdatwd.%d.running
61 The status of the watchdog timer. 0 if not running, or 1 if running.
62 .It Va dev.wdatwd.%d.timeout
63 The current value of the watchdog timeout in millisecond.
64 This can be 0 on some systems, and the zero value means that the default
66 .It Va dev.wdatwd.%d.timeout_configurable
67 Whether the timeout is configurable or not.
68 It is 0 if configurable or any positive value if not.
69 .It Va dev.wdatwd.%d.timeout_default
70 The default value of the watchdog timeout in millisecond if any.
79 .%T Hardware Watchdog Timers Design Specification
80 .%R Requirements for Hardware Watchdog Timers Supported by Microsoft(R) Windows Vista(R) and Microsoft Windows Server(R) 2008 Operating Systems
81 .%A Microsoft Corporation
82 .%U http://msdn.microsoft.com/en-us/windows/hardware/gg463320.aspx
90 .An Tetsuya Uemura Aq Mt t_uemura@macome.co.jp
91 of MACOME, Corporation.