bg4cd: define custom romstage entry

this change defines a custom romstage entry for bg4cd. the entry code
stalls subcores, sets up the stack, and clears the bss before jumping to main.

BUG=none
BRANCH=tot
TEST=built all current boards. booted cosmos p1

Change-Id: Idde43f94555bec7804a16928c58ce673956a39e5
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 7a35e12eb29b351cc0baaea24344f00d2ba905f6
Original-Change-Id: I9172e873a43847f3ea82cd1d9fd0841f0db83994
Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/238022
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/9722
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

0 files changed, 0 insertions, 0 deletions