Date: Wed, 19 Sep 2018 08:06:32 -0700 (PDT) From: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net> To: Greg V <greg@unrelenting.technology> Cc: Rebecca Cran <rebecca@bluestop.org>, Konstantin Belousov <kostikbel@gmail.com>, Warner Losh <imp@bsdimp.com>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: FreeBSD EFI projects Message-ID: <201809191506.w8JF6W10024280@pdx.rh.CN85.dnsmgr.net> In-Reply-To: <1537368121.5568.1@hraggstad.unrelenting.technology>
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> On Wed, Sep 19, 2018 at 5:34 PM, Rodney W. Grimes > <freebsd-rwg@pdx.rh.CN85.dnsmgr.net> wrote: > >> On 9/18/18 4:11 AM, Greg V wrote: > >> > >> > > >> > I can confirm that the kernel already worked fine when booted from > >> > 32-bit EFI. > >> > > >> > I booted an old Mac into HardenedBSD using a 32-bit-EFI build of > >> GRUB2 :) > >> > >> > >> Was that a 64-bit version of FreeBSD? My understanding is the 32-bit > >> FreeBSD boots fine, but 64-bit needs work. > > > > You would be hard pressed to find a system with a 64 bit CPU that > > could run 64 bit FreeBSD that had a 32 bit EFI implementation. > > Mac mini 2006 with a Core2Duo instead of the stock CoreDuo (and the > 2007 model's firmware flashed, but I don't think that impacts FreeBSD). Yes, that is one of the catagories of rare, a EFI-32 bit system that was originally shipped with a 32 bit only CPU, that later got upgraded in the field with a 64 bit CPU, that still runs a EFI-32 bios. Are you sure the 2007 firmware is EFI32? I would of thought since they upgraded the base system to a 64 bit CPU they would of shipped it with a EFI-64 bios. > > And probably just the 2007 model as well :) > > Also, IIRC there were some Intel Atom tablets with 32-bit EFI. Atom N2xx and Z5xx series Atom models cannot run x86-64 -- Rod Grimes rgrimes@freebsd.org
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