From: Timur Tabi <timur@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] p4080ds starts OS with MSR[EE]=1 and DEC armed?
Date: Tue, 15 Mar 2011 16:21:02 -0500 [thread overview]
Message-ID: <4D7FD83E.404@freescale.com> (raw)
In-Reply-To: <3B470DFF-2345-45CE-A682-82D13A9E45C2@pobox.com>
Jimi Xenidis wrote:
> That is true for "server" and "classic" because they do not necessarily stop at 0.
> for embedded you can just:
> /* u-boot leaves decrementer enabled */
> mtspr(SPRN_DECAR, 0); /* paranoia */
> mtspr(SPRN_DEC, 0);
> mtspr(SPRN_TCR, 0);
> mtspr(SPRN_TSR, 0);
I think you mean
mtspr(SPRN_TSR, 0xFFFFFFFF);
since it's write-1-to-clear. Other than that, this is exactly what I was
talking about. I just think it makes sense for the boot loader to try to
disable as many interrupt sources as possible, and force the OS to enable the
ones it wants.
On the other hand, Scott's points are completely valid.
--
Timur Tabi
Linux kernel developer at Freescale
next prev parent reply other threads:[~2011-03-15 21:21 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-03 14:59 [U-Boot] p4080ds starts OS with MSR[EE]=1 and DEC armed? Jimi Xenidis
2011-03-12 22:56 ` Kumar Gala
2011-03-13 15:46 ` Jimi Xenidis
2011-03-15 19:21 ` Timur Tabi
2011-03-15 20:24 ` Scott Wood
2011-03-15 21:16 ` Jimi Xenidis
2011-03-15 21:21 ` Timur Tabi [this message]
2011-03-15 21:22 ` Jimi Xenidis
2011-03-15 21:22 ` Scott Wood
2011-03-15 21:24 ` Scott Wood
2011-03-14 18:09 ` Scott Wood
2011-03-14 19:39 ` Jimi Xenidis
2011-03-15 5:46 ` Kumar Gala
2011-03-14 21:25 ` Kumar Gala
2011-03-14 21:37 ` Scott Wood
2011-03-15 5:39 ` Kumar Gala
2011-03-15 16:11 ` Scott Wood
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