Re: [PATCH] Use correct x86 reboot vector

[H. Peter Anvin]

Richard B. Johnson wrote:
> 
> Don't thing there's anything much easier than:
> 
> 		movl	$1, %eax
> 		movl	%eax, %cr0
> 
> ... execute that in paged RAM (above the 1:1 mapping), and you
> will get a hard processor reset without any bus access at all.
> This unmaps everything in one fell-swoop.
> 

You go back to 1:1 mappings at that point, so you *will* have bus accesses.

	-hpa