From: "H. Peter Anvin" <hpa@zytor.com>
To: root@chaos.analogic.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Use correct x86 reboot vector
Date: Tue, 13 May 2003 12:27:02 -0700 [thread overview]
Message-ID: <3EC14706.1010200@zytor.com> (raw)
In-Reply-To: <Pine.LNX.4.53.0305131501150.2332@chaos>
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
next prev parent reply other threads:[~2003-05-13 19:14 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-13 12:49 [PATCH] Use correct x86 reboot vector Chuck Ebbert
2003-05-13 18:45 ` H. Peter Anvin
2003-05-13 19:04 ` Richard B. Johnson
2003-05-13 19:27 ` H. Peter Anvin [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-05-10 2:56 Andi Kleen
2003-05-10 3:35 ` CaT
2003-05-10 3:58 ` H. Peter Anvin
2003-05-10 14:49 ` Alan Cox
2003-05-10 16:17 ` Jamie Lokier
2003-05-10 18:47 ` Jos Hulzink
2003-05-11 18:01 ` Eric W. Biederman
2003-05-11 17:24 ` Alan Cox
2003-05-11 19:04 ` Eric W. Biederman
2003-05-10 16:15 ` Jamie Lokier
2003-05-10 17:09 ` Randy.Dunlap
2003-05-10 19:41 ` Jos Hulzink
2003-05-10 18:10 ` Jamie Lokier
2003-05-10 20:55 ` Jos Hulzink
2003-05-11 3:50 ` Linus Torvalds
2003-05-11 9:37 ` Jos Hulzink
2003-05-11 14:01 ` Jamie Lokier
2003-05-11 17:38 ` Davide Libenzi
2003-05-11 17:56 ` Eric W. Biederman
2003-05-11 18:23 ` Davide Libenzi
2003-05-11 19:12 ` Eric W. Biederman
2003-05-12 15:36 ` Maciej W. Rozycki
2003-05-13 6:35 ` H. Peter Anvin
2003-05-11 18:38 ` Linus Torvalds
2003-05-11 19:00 ` Matt Mackall
2003-05-11 19:16 ` Eric W. Biederman
2003-05-12 1:07 ` H. Peter Anvin
2003-05-11 19:10 ` Eric W. Biederman
2003-05-11 18:43 ` Christer Weinigel
2003-05-11 20:22 ` wingel
2003-05-11 20:26 ` Davide Libenzi
2003-05-11 17:54 ` Eric W. Biederman
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