Date: Wed, 19 Sep 2018 18:17:18 +0300 From: Greg V <greg@unrelenting.technology> To: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net> 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: <1537370238.5568.2@hraggstad.unrelenting.technology> In-Reply-To: <201809191506.w8JF6W10024280@pdx.rh.CN85.dnsmgr.net> References: <1537368121.5568.1@hraggstad.unrelenting.technology> <201809191506.w8JF6W10024280@pdx.rh.CN85.dnsmgr.net>
index | next in thread | previous in thread | raw e-mail
On Wed, Sep 19, 2018 at 6:06 PM, Rodney W. Grimes <freebsd-rwg@pdx.rh.CN85.dnsmgr.net> wrote: >> 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. The EFI firmware is technically 64 bit… but it only boots 32-bit binaries. https://everymac.com/mac-answers/snow-leopard-mac-os-x-faq/mac-os-x-snow-leopard-64-bit-macs-64-bit-efi-boot-in-64-bit-mode.html 'Furthermore, it appears that although subsequently released MacBook, MacBook Air, and pre-"Mid-2010" Mac mini models all are equipped with "Core 2 Duo" 64-bit processors and 64-bit EFIs, Apple has blocked these "consumer-targeted" Macs from booting in 64-bit mode. iMac and MacBook Pro models released in 2007 with 64-bit EFIs seem to have been blocked as well.' >> 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 Atom Z3740 — "Instruction Set: 64-bit" https://ark.intel.com/products/76759/Intel-Atom-Processor-Z3740-2M-Cache-up-to-1_86-GHz The tablet in question: ASUS VivoTab Note 8 (M80TA) https://www.asus.com/us/Tablets/ASUS_VivoTab_Note_8_M80TA/home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1537370238.5568.2>