Messages in this thread |  | | Date | Tue, 13 May 2003 12:27:02 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] Use correct x86 reboot vector |
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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
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