Re: port-i386/46808: 6.0_BETA2 install crashes on VIA VT6202 detection

["jc.lynx" <jc.lynx%laposte.net@localhost>]

The following reply was made to PR port-i386/46808; it has been noted by GNATS.

From: "jc.lynx" <jc.lynx%laposte.net@localhost>
To: Christos Zoulas <christos%zoulas.com@localhost>, 
gnats-bugs%NetBSD.org@localhost, 
        port-i386-maintainer%netbsd.org@localhost, 
gnats-admin%netbsd.org@localhost, 
        netbsd-bugs%netbsd.org@localhost
Cc: 
Subject: Re: port-i386/46808: 6.0_BETA2 install crashes on VIA VT6202
 detection
Date: Sat, 25 Aug 2012 23:21:48 +0200

 ------=_Part_1067438_1348085712.1345929708278
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: quoted-printable
 
 OK. I've installed NetBSD on another machine and done the following alterat=
 ions to ehci_pci.c
 
 Replaced :
 
 const u_int maxncomp =3D EHCI_HCS_N_CC(EREAD4(&sc->sc, EHCI_HCSPARAMS));
 
 with :
 
 const u_int vovo =3D EREAD4(&sc->sc, EHCI_HCSPARAMS);
 const u_int maxncomp =3D EHCI_HCS_N_CC(vovo);
 printf("maxncomp =3D %u\n", maxncomp);
 printf("EREAD4(&sc->sc, EHCI_HCSPARAMS) =3D %x, vovo);
 
 I hope I got the types right.
 Anyway, I burned and booted boot.iso and got this :
 
 maxncomp =3D 15
 EREAD4(&sc->sc, EHCI_HCSPARAMS) =3D ffffffff
 
 So, yeah, EHCI_HCS_N_CC(ffffffff), i.e. (ffffffff >> 12) & 0xf is 15, indee=
 d greater than EHCI_COMPANION_MAX which is 8 ; but I guess that this ffffff=
  is not the data we were looking for anyway.
 I could not find code related to "special" VT6202 handling in other BSD's c=
 ode, except an unrelated issue with EHCI polling frequency.
 I suppose we now have to dig into how sc was initialised, or whether EREAD4=
 (&sc->sc, EHCI_HCS_PARAMS) is the way to get what we were looking for on th=
 is particular device.
 
 Une messagerie gratuite, garantie =C3=A0 vie et des services en plus, =C3=
 =A7a vous tente ?
 Je cr=C3=A9e ma bo=C3=AEte mail www.laposte.net
 
 ------=_Part_1067438_1348085712.1345929708278
 Content-Type: text/html; charset=UTF-8
 Content-Transfer-Encoding: quoted-printable
 
 OK. I've installed NetBSD on another machine and done the following alterat=
 ions to ehci_pci.c<br /><br />Replaced : <br /><br />const u_int maxncomp =
 =3D EHCI_HCS_N_CC(EREAD4(&amp;sc-&gt;sc, EHCI_HCSPARAMS));<br /><br />with =
 :<br /><br />const u_int vovo =3D EREAD4(&amp;sc-&gt;sc, EHCI_HCSPARAMS);<b=
 r />const u_int maxncomp =3D EHCI_HCS_N_CC(vovo);<br />printf(&quot;maxncom=
 p =3D %u\n&quot;, maxncomp);<br />printf(&quot;EREAD4(&amp;sc-&gt;sc, EHCI_=
 HCSPARAMS) =3D %x, vovo);<br /><br />I hope I got the types right.<br />Any=
 way, I burned and booted boot.iso and got this :<br /><br />maxncomp =3D 15=
 <br />EREAD4(&amp;sc-&gt;sc, EHCI_HCSPARAMS) =3D ffffffff<br /><br />So, ye=
 ah, EHCI_HCS_N_CC(ffffffff), i.e. (ffffffff &gt;&gt; 12) &amp; 0xf is 15, i=
 ndeed greater than EHCI_COMPANION_MAX which is 8 ; but I guess that this ff=
 ffff is not the data we were looking for anyway.<br />I could not find code=
  related to &quot;special&quot; VT6202 handling in other BSD's code, except=
  an unrelated issue with EHCI polling frequency.<br />I suppose we now have=
  to dig into how sc was initialised, or whether EREAD4(&amp;sc-&gt;sc, EHCI=
 _HCS_PARAMS) is the way to get what we were looking for on this particular =
 device.
 ------=_Part_1067438_1348085712.1345929708278--