Date: Thu, 28 Apr 2005 22:24:50 -0600 From: Scott Long <scottl@samsco.org> To: Julian Elischer <julian@elischer.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/i386/conf PAE Message-ID: <4271B712.8080903@samsco.org> In-Reply-To: <4271B6E9.4010302@elischer.org> References: <200504290259.j3T2xJON003744@repoman.freebsd.org> <4271B6E9.4010302@elischer.org>
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Julian Elischer wrote: > Scott Long wrote: > >> scottl 2005-04-29 02:59:19 UTC >> >> FreeBSD src repository >> >> Modified files: >> sys/i386/conf PAE Log: >> For whatever reason, we don't allow USB on PAE. Since it's a >> dependency >> for EHCI, exclude that driver also. >> Revision Changes Path >> 1.15 +1 -0 src/sys/i386/conf/PAE > > > EHCI can actually support 64 bit physical addresses. > We haven't doen it yet but it will probably happen. > of course with bus-dma specifying addresses < 4G, it should still work > with > 32 bit memory addresses (bounce buffering). > > Yeah, I can't think of a good reason why the USB stack shouldn't work on PAE since it does work on real 64-bit platforms. Maybe there are some 'sizeof(void*) != sizeof(bus_addr_t)' spots in it? My only concern was making the tree build, though. Feel free to correct it. I can probably make a PAE system available if you'd like. Scott
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