From: Chris Friesen <cfriesen@nortel.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>
Subject: Re: question on inline assembly and long long values
Date: Wed, 06 Apr 2005 18:09:29 -0600 [thread overview]
Message-ID: <42547A39.4060001@nortel.com> (raw)
In-Reply-To: <1112831823.9568.219.camel@gaston>
Benjamin Herrenschmidt wrote:
> On Wed, 2005-04-06 at 17:56 -0600, Chris Friesen wrote:
>>Benjamin Herrenschmidt wrote:
>>>But the kernel code always runs in 64 bits mode...
>>
>>The ppc kernel (not ppc64) runs in 64-bit mode? An unsigned long long
>>fits in a single register in C code?
>
> Ah no, it doesn't, but then, be careful to have interrupts off when you
> do that are the interrupt handler won't save the high half of the
> registers between the mtmsrd and your "splitting" of it.
Right. All this stuff is running with interrupts off.
Chris
prev parent reply other threads:[~2005-04-07 0:09 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-06 18:26 question on inline assembly and long long values Chris Friesen
2005-04-06 19:16 ` Kumar Gala
2005-04-06 20:01 ` Chris Friesen
2005-04-06 21:18 ` Gabriel Paubert
2005-04-06 21:37 ` Chris Friesen
2005-04-06 23:19 ` Benjamin Herrenschmidt
2005-04-06 23:30 ` Chris Friesen
2005-04-06 23:49 ` Benjamin Herrenschmidt
2005-04-06 23:56 ` Chris Friesen
2005-04-06 23:57 ` Benjamin Herrenschmidt
2005-04-07 0:09 ` Chris Friesen [this message]
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