add detection of serial console presence to btx and boot2-like blocks
authoravg <avg@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Sat, 6 Oct 2012 20:08:29 +0000 (20:08 +0000)
committeravg <avg@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Sat, 6 Oct 2012 20:08:29 +0000 (20:08 +0000)
commit1af4b8d43383b4959a5b99f5efcdcb353b3ba373
tree99ce648a3456cb4ac4d56c76c3243c65ddb799e2
parent81e5777976988d840fa6f11bf5c34bc69a248257
add detection of serial console presence to btx and boot2-like blocks

Note that this commit slightly increases size of boot blocks.

Reviewed by: jhb
Tested by: Olivier Cochard-Labbe <olivier@cochard.me>
MFC after: 26 days

git-svn-id: svn://svn.freebsd.org/base/head@241301 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
sys/boot/i386/boot2/boot2.c
sys/boot/i386/boot2/lib.h
sys/boot/i386/boot2/sio.S
sys/boot/i386/btx/btx/btx.S
sys/boot/i386/gptboot/gptboot.c
sys/boot/i386/zfsboot/zfsboot.c