Date: Thu, 13 Mar 2008 15:56:24 -0400 From: John Baldwin <jhb@freebsd.org> To: Rink Springer <rink@freebsd.org> Cc: cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/i386/i386 machdep.c Message-ID: <200803131556.24388.jhb@freebsd.org> In-Reply-To: <20080313195116.GJ77132@rink.nu> References: <200803131856.m2DIurjS096021@repoman.freebsd.org> <20080313195116.GJ77132@rink.nu>
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On Thursday 13 March 2008 03:51:16 pm Rink Springer wrote: > On Thu, Mar 13, 2008 at 06:56:53PM +0000, John Baldwin wrote: > > jhb 2008-03-13 18:56:53 UTC > > > > FreeBSD src repository > > > > Modified files: > > sys/i386/i386 machdep.c > > Log: > > Use the SMAP data from the loader if it is provided instead of using > > virtual 86 mode to query the BIOS directly. This is needed for certain > > HP machines whose BIOS only provide an SMAP when invoked from real mode. > > On such machines the loader will be able to query the SMAP successfully > > due to the recent BTX changes, but the kernel will not. > > Thanks! I was thinking about doing this myself - seems you beat me to > it. > > > One thing I'm not sure of is if we can skip the INT 12h probe altogether > > if we have the SMAP from the loader as it seems that we do the INT 12h > > probe to setup enough state so we can use vm86 to call the BIOS. > > Hmm, can't we just have loader(8) pass this information as well? It > seems it already does in the bootinfo structure... I think people still want to be able to boot kernels from boot2/gptboot rather than loader in which case we'd always have to have the vm86 calls that are there now. -- John Baldwin
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