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Before performing a sysjump, ensure that: 1. LPC interrupts are disabled : Ensures interrupts are not taken until next enable. 2. LPC window is closed by writing 0xfffffff8 to window base addresses: Prevents any memory corruption by host. BUG=chrome-os-partner:57642 BRANCH=None TEST=Verfied that LPC communication works after sysjump to RW. Change-Id: I7b7826b2544f1c94cfa9c96b6ac82bc3517b1820 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/388755 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Mulin Chao <mlchao@nuvoton.com>