From: John David Anglin <dave.anglin@bell.net>
To: Helge Deller <deller@gmx.de>,
linux-parisc <linux-parisc@vger.kernel.org>
Subject: Re: Does there exists any 32bit-only PARISC SMP machines?
Date: Thu, 05 Sep 2013 12:24:09 -0400 [thread overview]
Message-ID: <5228B029.8060807@bell.net> (raw)
In-Reply-To: <5227548F.5090909@bell.net>
On 9/4/2013 11:41 AM, John David Anglin wrote:
> On 9/4/2013 10:28 AM, Domenico Andreoli wrote:
>> BTW, this is the most detailed investigation I'm aware of:
>>
>> https://lkml.org/lkml/2008/4/20/251
> I have the sense that MEM_RENDEZ_HI may not be set correctly for your
> machine:
>
> /* Set the smp rendezvous address into page zero.
> ** It would be safer to do this in init_smp_config() but
> ** it's just way easier to deal with here because
> ** of 64-bit function ptrs and the address is local to this file.
> */
> load32 PA(smp_slave_stext),%r10
> stw %r10,0x10(%r0) /* MEM_RENDEZ */
> stw %r0,0x28(%r0) /* MEM_RENDEZ_HI - assume addr
> < 4GB */
>
> This is possibly due to a change in memory range detection:
>
> --- dmesg.txt 2008-04-21 11:19:16.000000000 +0200
> +++ dmesg2.txt 2008-04-21 15:27:46.000000000 +0200
> @@ -1,6 +1,7 @@
> -Linux version 2.6.22-3-parisc64-smp (Debian 2.6.22-6)
> (maks@debian.org) (gcc version 4.1.3 20071019 (prerelease) (Debian
> 4.1.2-17)) #2 SMP Mon Nov 12 21:04:20 CET 2007
> +Linux version 2.6.25 (cavok@ska) (gcc version 4.1.3 20080308
> (prerelease) (Debian 4.1.2-21)) #8 SMP Mon Apr 21 12:25:50 CES8
Kyle more or less confirmed that smp_slave_stext is not being call. The
firmware documentation
indicates that this might occur if memory isn't "properly" initialized.
It would be helpful if you did a regression search
for the change that broke the cpu release.
Dave
--
John David Anglin dave.anglin@bell.net
next prev parent reply other threads:[~2013-09-05 16:24 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-29 18:51 Does there exists any 32bit-only PARISC SMP machines? Helge Deller
2013-08-30 2:42 ` James Bottomley
2013-09-03 15:56 ` Domenico Andreoli
2013-09-04 8:13 ` Aw: " Helge Deller
2013-09-04 14:07 ` Domenico Andreoli
2013-09-04 14:28 ` Domenico Andreoli
2013-09-04 15:41 ` John David Anglin
2013-09-05 16:24 ` John David Anglin [this message]
2013-10-21 20:07 ` HP J5600/J6750 64bit SMP CPU#1 stuck problems [was: Does there exists any 32bit-only PARISC SMP machines?] Helge Deller
2013-10-21 20:37 ` John David Anglin
2013-10-21 20:39 ` Helge Deller
2013-10-26 22:06 ` Helge Deller
2013-10-29 13:31 ` Domenico Andreoli
2013-09-04 8:44 ` Does there exists any 32bit-only PARISC SMP machines? Thomas Bogendoerfer
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