diff options
Diffstat (limited to 'sys/dev/sio/sio.c')
| -rw-r--r-- | sys/dev/sio/sio.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/sys/dev/sio/sio.c b/sys/dev/sio/sio.c index 1bbf598..954ebd4 100644 --- a/sys/dev/sio/sio.c +++ b/sys/dev/sio/sio.c @@ -1356,6 +1356,16 @@ determined_type: ; } if (ret) device_printf(dev, "could not activate interrupt\n"); +#if defined(DDB) && (defined(BREAK_TO_DEBUGGER) || \ + defined(ALT_BREAK_TO_DEBUGGER)) + /* + * Enable interrupts for early break-to-debugger support + * on the console. + */ + if (ret == 0 && unit == comconsole) + outb(siocniobase + com_ier, IER_ERXRDY | IER_ERLS | + IER_EMSC); +#endif } return (0); @@ -1597,9 +1607,19 @@ comhardclose(com) com->do_dcd_timestamp = FALSE; com->pps.ppsparam.mode = 0; sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK); + tp = com->tp; + +#if defined(DDB) && (defined(BREAK_TO_DEBUGGER) || \ + defined(ALT_BREAK_TO_DEBUGGER)) + /* + * Leave interrupts enabled and don't clear DTR if this is the + * console. This allows us to detect break-to-debugger events + * while the console device is closed. + */ + if (com->unit != comconsole) +#endif { sio_setreg(com, com_ier, 0); - tp = com->tp; if (tp->t_cflag & HUPCL /* * XXX we will miss any carrier drop between here and the |
