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From: Marcel Moolenaar <marcel@FreeBSD.org>
Subject: PERFORCE change 22678 for review
To: Perforce Change Reviews <perforce@freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=22678

Change 22678 by marcel@marcel_nfs on 2002/12/23 16:57:35

	Don't enable the FIFOs for the console. Interrupts are disabled
	anyway, so there's really no advantage. Enabling them may cause
	problems. 

Affected files ...

.. //depot/projects/ia64/sys/dev/sio/sio_cons.c#6 edit

Differences ...

==== //depot/projects/ia64/sys/dev/sio/sio_cons.c#6 (text+ko) ====

@@ -155,19 +155,16 @@
 static void
 siocninit(struct consdev *cp)
 {
-	u_char fcr, iir;
+	u_char iir;
 
 	/* Disable all interrupt sources. */
 	sio_setreg(&sio_console, com_ier, 0);
 	/* XXX barrier */
 
-	/* Set FCR. */
-	fcr = FCR_RX_MEDH | FCR_ENABLE;
-	sio_setreg(&sio_console, com_fcr, fcr);
+	/* Disable the FIFO (if present). */
+	sio_setreg(&sio_console, com_fcr, 0);
 	/* XXX barrier */
-	sio_setreg(&sio_console, com_fcr, fcr | FCR_RCV_RST | FCR_XMT_RST);
-	/* XXX barrier */
-	sio_console.reg_fcr = fcr;
+	sio_console.reg_fcr = 0;
 
 	/* Set MCR. */
 	sio_setreg(&sio_console, com_mcr, MCR_IENABLE | MCR_RTS | MCR_DTR);

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