soc/imgtec/pistachio: add implementation for system reset

Implement system reset by calling the watchdog soft reset.
Following the soft reset, the SoC will reset to the same logic
state and therefore have the same effect as a hard (power-on)
reset except for:
 - watchdog scratch registers will be unaffected (hard reset
   will clear them)
 - the real time clock will be unaffected

TEST=tested on Pistachio bring up board

Change-Id: I1332c2249c756f6d8574fc5c407de52f88e60f08
Signed-off-by: Ionela Voinescu <>
Tested-by: build bot (Jenkins)
Reviewed-by: Vadim Bendebury <>
1 file changed