Date: Mon, 30 Aug 1999 22:42:31 -0700 From: Mike Smith <mike@smith.net.au> To: "Neil Bradley" <neil@synthcom.com> Cc: smp@freebsd.org Subject: Re: BIOS calls on SMP systems Message-ID: <199908310542.WAA02756@dingo.cdrom.com> In-Reply-To: Your message of "Mon, 30 Aug 1999 21:56:44 PDT." <009c01bef36d$394ee850$076291c6@Engineering.retrocade.com>
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> > Can someone familiar with the Intel MP spec clarify for me whether it's > > permissible for an AP to call the BIOS, or whether only the BSP may do > > this? > > It depends upon what services of the BIOS you're looking to call. If it's > the standard INT services, only the BSP will be able to do it reliably. If > you're calling the PCI functions, then you're most likely safe. But it is > safe for the BSP to call BIOS even when the AP's aren't. Ok, so the baseline answer is "only the BSP can reliably call the BIOS". Correct there? If so, I have some interesting tunneling work to do... -- \\ The mind's the standard \\ Mike Smith \\ of the man. \\ msmith@freebsd.org \\ -- Joseph Merrick \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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