HW Watchdog reset check

How can I check if the device reboot occurred as a result of activating the HW watchdog ?
Can I use software watchodg in Colibri T30 ?


Please download Tegra 3 TRM from Nvidia Reference and refer section CLK_RST_CONTROLLER_RST_SOURCE_0 and Watchdog Timer Programming Guide to getting know the last reset cause.
Please refer Watchdog article for more information.