From owner-freebsd-arm@freebsd.org Wed Aug 9 19:14:49 2017 Return-Path: Delivered-To: freebsd-arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4F8A8DD3CD0 for ; Wed, 9 Aug 2017 19:14:49 +0000 (UTC) (envelope-from sylvain@sylvaingarrigues.com) Received: from mail-wm0-x242.google.com (mail-wm0-x242.google.com [IPv6:2a00:1450:400c:c09::242]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E0CFD81DEE for ; Wed, 9 Aug 2017 19:14:48 +0000 (UTC) (envelope-from sylvain@sylvaingarrigues.com) Received: by mail-wm0-x242.google.com with SMTP id d40so546925wma.3 for ; Wed, 09 Aug 2017 12:14:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sylvaingarrigues-com.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to; bh=p0oZ53NRRTng68sTbVskZlUdcVcOb6NaXhr1jj5ZE4k=; b=ubkKcrf3jDQAeEnLywfdFZGHz9DXUAq4+MxrXF15gAioX90hDelE1vN99d6j7JQ2Ka MOB/lPQGRkfufGvcEk8XnI5HzsO6YWW8kkzwGY3L8QSEwZL2bVqT8+/soQ7TA5B+i7Jt HoeEjse5XNZSifGP4dBdYFvyWQjFgRa49LadqR0jIOMlLd1ClBsKx6gAWcM55O1s5/OO CBmZlfqQiA/T8Po1oow+cMCWHWGiWbA6E/Pr20CLwPFGSv/nIoICGHuHmOq+hVb9lL+G s05GFpH/E0ztjReyJACQDXS0d8FblN93/vTaO/IlqnOiDWIZdB+9IAsWutE4q37ofAVy aRmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=p0oZ53NRRTng68sTbVskZlUdcVcOb6NaXhr1jj5ZE4k=; b=V94OJannS8zFvj8lnjpVvT8mR0rzfluBmRZSdkiRtjF+RwUTUxQ9Kdl5bOv/VVtLMJ 2nbImhTh5mhqR1VRStiPl+ruj6ckpM+Co0NxrU8UF5rUzTQRC/g42nw9iv5IJTZMZSOt 6UhXoam/waCovEP2w//RYy5sPnKRk1LNg6RK9Dc1tFGHr4QaRofEZK5DxdNUGYvQolAA EZ48fdsxL7QDd6iD/0LbROL8W7V1tX/cr+ksMIKN4jVposQG8nSYLZist7U6QV5te0jc BhSRMXfu9ysZVBUwU5RpxBzVY6no6bPgxAjagh291wzh1Pt0XIdbRQU7SUeHob0184Su r3EA== X-Gm-Message-State: AHYfb5i5BeYyBUYDVOzoIJa7wr9tHL8WUnPw20se6pkVf0OGMJbUeLeR b1LypeWBmNqt5scNHu9CoBCFG5OXuFBCV3s= X-Received: by 10.80.180.15 with SMTP id b15mr9094887edh.226.1502306086520; Wed, 09 Aug 2017 12:14:46 -0700 (PDT) MIME-Version: 1.0 Received: by 10.80.129.229 with HTTP; Wed, 9 Aug 2017 12:14:46 -0700 (PDT) X-Originating-IP: [82.251.149.119] From: Sylvain Garrigues Date: Wed, 9 Aug 2017 21:14:46 +0200 Message-ID: Subject: armv6 kernel support for Raspberry Pi 3 in default aarch32 mode To: freebsd-arm Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Aug 2017 19:14:49 -0000 Hello, I have a kernel.bin (compiled with TARGET_ARCH=armv6) which boots perfectly on my Raspberry Pi 2 v1.1, and I don't understand why the same kernel.bin does't boot on my Raspberry Pi 3. I have same DTB and config.txt, with enable_uart=1. I can see in the kernel source code that the cortex-a53 is a listed supported processor, and the raspberry pi 3 boots by default in aarch32 mode which is compatible with code compiled for armv6. So what's wrong and what shall be done to make our armv6 kernel boot on a raspberry pi 3? Also for some time now the new raspberry pi 2 available (starting from v1.2 board revision) also have a cortex-a53 and the same soc than raspberry pi 3 so it would be great to have a working FreeBSD/armv6 image for these recent famous boards. I am interested in getting directions to make this happen (modifications needed in locore-v6.S?) Sylvain PS: If you ask why I don't use the arm64 kernel, it's because the vchiq driver does not work yet in 64 bit mode.