freebsd-dev/sys/dev/sio
Ian Dowse 11fbe665c0 The serial console break-to-debugger support only functioned while
the console device was open. At other times, the interrupts that
are used to detect the break signal or ~^B sequence were disabled,
so these events would not be noticed until the next open (e.g. the
next kernel printf). This was mainly a problem while there was no
getty running on the console, such as during bootup or shutdown.

For serial consoles with break-to-debugger support, we now enable
the generation of interrupts at attach time, and we leave them
enabled while the device is closed.

Reviewed by:	bde (I've since made chages as per his suggestions)
2001-06-20 16:47:23 +00:00
..
sio.c The serial console break-to-debugger support only functioned while 2001-06-20 16:47:23 +00:00
sioreg.h Restore the old sio* - bruce can fix it himself. 1999-09-08 10:59:03 +00:00