coreboot rush: Add support for basic romstage

Add basic romstage support for rush. Since, dram init needs to be done before we
can jump to armv8 core, romstage will run on armv4 core as well. Thus,
correcting the compiler selection options.

TEST=Compiles successfully for rush. Prints romstage banner and initial printk

Original-Change-Id: Ie3cd290e56a712b07c1503dab199e4e34cec04d2
Original-Signed-off-by: Furquan Shaikh <>
Original-Tested-by: Furquan Shaikh <>
Original-Reviewed-by: Aaron Durbin <>
Original-Reviewed-by: Tom Warren <>
Original-Commit-Queue: Aaron Durbin <>
(cherry picked from commit d20b4e66209e902f54a07a17d5ce741f0a0b3a7b)
Signed-off-by: Marc Jones <>

Change-Id: Ic6b7ef4a2ea01c95d0c7f040bbd079219cf5750a
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <>
Reviewed-by: Paul Menzel <>
3 files changed