From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: <3f8302eb0255b15a26efc3da907bd0c2@hamnavoe.com> References: <3f8302eb0255b15a26efc3da907bd0c2@hamnavoe.com> Date: Thu, 3 Mar 2016 16:14:44 +0000 Message-ID: From: Charles Forsyth To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: multipart/alternative; boundary=047d7bd91b54f9c679052d274ba8 Subject: Re: [9fans] Plan 9 port to Raspberry Pi 3 Model B (ARM64)? Topicbox-Message-UUID: 8a7a45e2-ead9-11e9-9d60-3106f5b1d025 --047d7bd91b54f9c679052d274ba8 Content-Type: text/plain; charset=UTF-8 The 32-bit subset of ARMv8 is (supposedly) better specified at the system level than ARMv7 (ie, by the v8 architecture itself). There are some cores that do just the 32-bit subset of v8, but apparently Cortex-A53 will do 64 as well, which I hadn't realised from the Rpi3 announcement I saw. On 3 March 2016 at 15:37, Richard Miller <9fans@hamnavoe.com> wrote: > >> cpu0: 1200MHz ARM Cortex-A53 r0p4 > > > > it's ARMv8-A! > > When booted in 32-bit mode, it behaves like armv7a. > > > --047d7bd91b54f9c679052d274ba8 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
The 32-bit subset of ARMv8 is (supposedly) better specifie= d at the system level than ARMv7
(ie, by the v8 architecture itself).

There are some cores that do just the 32-bit subset of v8, = but apparently Cortex-A53 will do 64 as well,
which I hadn't re= alised from the Rpi3 announcement I saw.

On 3 March 2016 at 15:= 37, Richard Miller <9fans@hamnavoe.com> wrote:
>> cpu0: 1200MHz ARM Cortex-A5= 3 r0p4
>
> it's ARMv8-A!

When booted in 32-bit mode, it behaves like armv7a.



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