From owner-freebsd-arm@FreeBSD.ORG Tue Feb 3 03:16:58 2015 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id D6466586 for ; Tue, 3 Feb 2015 03:16:58 +0000 (UTC) Received: from mail-pa0-f46.google.com (mail-pa0-f46.google.com [209.85.220.46]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A5DA129F for ; Tue, 3 Feb 2015 03:16:58 +0000 (UTC) Received: by mail-pa0-f46.google.com with SMTP id lj1so90322284pab.5 for ; Mon, 02 Feb 2015 19:16:52 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=PpMNXcjZTXhWhNC97Uql48Z+6vEs0QckKgeAapADR6k=; b=j4Y/OliMxMRIyMLIPYdNN7p8riIut93tyQMKH/dUzrHbxF7BX6dYBvfdY8l2RM3EnK jkvk1E8e7juDtjNOn6hitqsbjxjHMo1aou/sby7AJuSqLSbwis94FmBRGdT5iPRJeQ7w 2jnpsz6NC43yyymQD5D3YxrFRLB7/PJjdJLqPTUuu3XUvSS+3CBCTq4OberbfGMaTt5Y bnYQPtdbE3UbB9Odtw5MDWK/SRXBcjjnJwyXARK8EcwTTWGB6RNmHU1qx5MstNRYp6i1 wY9KJ+DnnO1CEerJ515jFQrD0f4Q/zNRPM3lL71dwFG/3+nrJ9xLd0DVnIfGqAixDIIa SjBQ== X-Gm-Message-State: ALoCoQlc4uEjOqV2B9ZvaxOqK/IOUUB9QJfnkFNzr0oIYCC6/fHOuEihQWZwHaZsdkvD2e4gSXUo X-Received: by 10.70.89.129 with SMTP id bo1mr33753026pdb.129.1422933412747; Mon, 02 Feb 2015 19:16:52 -0800 (PST) Received: from lgmac-swong.corp.netflix.com ([69.53.236.236]) by mx.google.com with ESMTPSA id y4sm457436pdk.75.2015.02.02.19.16.51 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 02 Feb 2015 19:16:52 -0800 (PST) Sender: Warner Losh Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2070.6\)) Subject: Re: RPi 2 B+? From: Warner Losh In-Reply-To: <54D01B6D.9040309@foxvalley.net> Date: Mon, 2 Feb 2015 20:16:49 -0700 Content-Transfer-Encoding: quoted-printable Message-Id: References: <20150202111352.GA2060@in-addr.com> <54CF5CC8.8050601@selasky.org> <20150202112205.GA29086@in-addr.com> <54D01B6D.9040309@foxvalley.net> To: Dan Raymond X-Mailer: Apple Mail (2.2070.6) Cc: freebsd-arm@freebsd.org X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Feb 2015 03:16:58 -0000 > On Feb 2, 2015, at 5:50 PM, Dan Raymond = wrote: >=20 > On 2/2/2015 9:08 AM, Adrian Chadd wrote: >> =46rom someone at the RPI foundation: >>=20 >> "All peripheral blocks detailed in the BCM2835 datasheet are >> applicable to BCM2836. The only thing that's changed in regards to >> these bits is the peripheral register set base address - which I >> believe is now placed at 0x3F000000." >>=20 >> still requires an updated uboot and some new glue for the new SoC = (DTS >> files, for example.) >>=20 >>=20 >>=20 >> -adrian >=20 > Will any changes be needed for FreeBSD to take advantage of SMP now = that the Raspberry Pi has 4 cores instead of 1? I imagine compiling for = ARMv7 instead of ARMv6 will incur performance improvements. Will that be = a simple transition? It will also be nice to have access to = pre-compiled ports. Most of the performance gain is marginal over the armv6hf port. = Compiling for armv7 would mean the packages wouldn=E2=80=99t work on the = original RPi, which is too high a cost for the marginal improvements. Warner