The startup sequence for cpu0 is implemented while also providing a trampoline for transitioning to 64-bit mode because the denver cores on t132 come out of cold reset in 32-bit mode. Mainboard callbacks are provided for providing the board-specific bits of the bringup sequence. BUG=chrome-os-partner:29923 BRANCH=None TEST=Built and booted through ramstage. Original-Change-Id: I50755fb6b06db994af8667969d8493f214a70aae Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/207263 Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org> Original-Reviewed-by: Stefan Reinauer <reinauer@google.com> (cherry picked from commit 17f09bf4bdb43986c19067ca8fd65d4c5365a7c6) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: I14d99c24dd6e29a4584c8c548c4b26c92b6ade97 Reviewed-on: http://review.coreboot.org/8586 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@google.com>