d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

atrtc: remove (pre-)historic check of RTC NVRAM at address 0x0e

Browse Source 
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
This commit is contained in:
Andriy Gapon 2010-10-16 10:45:36 +00:00
parent 4518d9ae4c
commit 2b89f1fc9e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=213918
1 changed files with 1 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sys/x86/isa/atrtc.c
View File

@ -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));