make main() in snow's romstage.c our romstage entry point

Our earlier attempt was jumping straight from asm to the old u-boot
board_init_f in lowlevel_init_c.c. We are getting ready to transition
to using a real bootblock for ARM, so add romstage.c to the files
compiled and we'll make main() our entry point.

This also updates romstage.ld to place main() (*(.text.startup)) at
the beginning of romstage.

Change-Id: Ifc77a6bfba27d915c4cad62c6c8040665294628a
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2163
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/arch/armv7/romstage.ld b/src/arch/armv7/romstage.ld
index b63a78e05e..61e3479cae 100644
--- a/src/arch/armv7/romstage.ld
+++ b/src/arch/armv7/romstage.ld
@@ -43,6 +43,8 @@ SECTIONS
 
 	.romtext . : {
 		_rom = .;
+		_start = .;
+		*(.text.startup);
 		*(.text);
 	}