[LinuxBIOS] [PATCH][v3] Merge hlt() into cpu.h (svn resync)

Peter Stuge peter at stuge.se
Thu Jul 12 04:27:46 CEST 2007

On Thu, Jul 12, 2007 at 03:44:23AM +0200, Uwe Hermann wrote:
> Btw, why does die() do an endless loop around hlt()? Is there a
> reason a hlt() will _not_ immediately halt the CPU? Can that
> happen?

It should halt, but the CPU may wake up again and continue executing
if an interrupt arrives. All should be masked, but you never know..

> If so, shall we move the loop into hlt() itself?

I don't think so. hlt() is just a C wrapper around the instruction.

Eventually I imagine building a panic room into die() so that
recovery can be made via console on fatal errors. Ideally with
some kind of stub for debugging stage0 and definately one for

> Merge hlt() into cpu.h where it belongs. Add some documentation.
> Signed-off-by: Uwe Hermann <uwe at hermann-uwe.de>

Acked-by: Peter Stuge <peter at stuge.se>

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