svn commit: r213918 - head/sys/x86/isa

[Andriy Gapon]

Author: avg
Date: Sat Oct 16 10:45:36 2010
New Revision: 213918
URL: http://svn.freebsd.org/changeset/base/213918

Log:
  atrtc: remove (pre-)historic check of RTC NVRAM at address 0x0e
  
  Old scrolls tell that once upon a time IBM AT BIOS was known to put some
  useful system diagnostic information into RTC NVRAM.  It is not really
  known if and for how long PC BIOSes followed that convention, but I
  believe that many, if not all, modern BIOSes do not do that any more
  (not mentioning other types of x86 firmware).
  Some diagnostic bits don't even make any sense any longer.
  The check results in confusing messages upon boot on some systems.
  So I am removing it.
  
  Discussed with:	bde, jhb, mav
  MFC after:	3 weeks

Modified:
  head/sys/x86/isa/atrtc.c

Modified: head/sys/x86/isa/atrtc.c
==============================================================================
--- head/sys/x86/isa/atrtc.c	Sat Oct 16 09:46:03 2010	(r213917)
+++ head/sys/x86/isa/atrtc.c	Sat Oct 16 10:45:36 2010	(r213918)
@@ -242,15 +242,12 @@ atrtc_attach(device_t dev)
 {
 	struct atrtc_softc *sc;
 	u_long s;
-	int i, diag;
+	int i;
 
 	sc = device_get_softc(dev);
 	if (!(sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
 	    &sc->port_rid, IO_RTC, IO_RTC + 1, 2, RF_ACTIVE)))
 		device_printf(dev,"Warning: Couldn't map I/O.\n");
-	diag = rtcin(RTC_DIAG);
-	if (diag != 0)
-		printf("RTC BIOS diagnostic error %b\n", diag, RTCDG_BITS);
 	atrtc_start();
 	clock_register(dev, 1000000);
 	bzero(&sc->et, sizeof(struct eventtimer));