From patchwork Fri Jan 20 17:46:13 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Darren Stevens X-Patchwork-Id: 717855 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3v4pY573Lsz9sQw for ; Sat, 21 Jan 2017 05:06:01 +1100 (AEDT) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3v4pY51FXqzDqSS for ; Sat, 21 Jan 2017 05:06:01 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from mout.kundenserver.de (mout.kundenserver.de [217.72.192.74]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3v4pWG5RpjzDqRF for ; Sat, 21 Jan 2017 05:04:26 +1100 (AEDT) Received: from mintppc.lan ([86.156.215.177]) by mrelayeu.kundenserver.de (mreue104 [212.227.15.179]) with ESMTPA (Nemesis) id 0MC1A0-1cdTFV0hYu-008qVX; Fri, 20 Jan 2017 19:04:13 +0100 From: Darren Stevens To: linuxppc-dev@lists.ozlabs.org Date: Fri, 20 Jan 2017 17:46:13 +0000 (GMT) Message-ID: <49760dd82b0.759fd78a@auth.smtp.1and1.co.uk> User-Agent: YAM/2.9p1 (AmigaOS4; PPC; rv:20140418r7798) Subject: [PATCH] powerpc/pasemi/nemo: Fix low memory values for boot. MIME-Version: 1.0 X-Provags-ID: V03:K0:SzGz3HVzZq/IEyuqYF+PW1OH6k/ui2BvnR9Ih5tCYX8Ys1H/19r tcLxetANwEB3dCJYLmbmdprKw+/eHr/kQe2yvg8Sfs77ynX3cC6Q3ZPA0pkEWsecEQMoTcX ATsbkctFqIU8LGHdab9PGCoIAFueZxRo98IWUqpRZ40KlBsfsIXZjw5ROjAELQez/Y/FR/T vh7lMh3SZ67/GT5kqIIPQ== X-UI-Out-Filterresults: notjunk:1; V01:K0:0E+BdRMhnEA=:asulMbgE+WhwAV3u7e0bXy g/QTgmCS/qRp0ywvomjWYDlQC1VL9oziTsk46ZMqvHC2FCaigLAuTwu3ZBcE8faeYISWc1A2l MpASTaz+2ePWNumyFc5ChWjdCR2RZAVlbOd7REI2tTtj/y1sfz0iLs3sZWSrp1kMnvwPjEjFg AdYXlUmEz2b1TNERbvcbSiYdK+Yu/cN4U0TNs/P19WjjsegZQBN5djx/ZeWxpGIsCn/c4B9m6 BJ+mj76gJ/jlBfM9iNiN/y5m5T9rl+udjlD5LnPyKqiwgOJFoPVeddIaqWj/0V6NrO7bbgn0b ka5ypSIUGVwMTOYw4uhc8fo6yC1IQ2reJmqrPBFffE+XQjPLSe4FhOPmTALcK/TISi78JZW9o 7/8PaPykr291cSXzDoId5ZaP4DL+8QmWeKihQbyjer1wdmI+x9VpD/WEWevXu1If8lKiYm1hF PgXHurB6VYnTHCMXbLTzc+Z8pteHvOPmvQOM6wEP7ML+ralr5POR7FB42HnWRK0nTEY8pu8Y9 LgG7dNoKec2LUdRDe2Eaf/fUyzbGYkdGprk6U9R0xVDDBNkmkRukp/cKeNPcHOge0sQmw/p+i KqLI7KVP2W4sQOo9ho3hDMQC4N57keIaK6Pt5eLQz+ACElMnaasYvhEuNvqI9FJkw11Cog3xK Dg7d8SWUenupOi7l83+8DLDCLC7JyGwsCxNjC5LEtVRdjLsLsMVOJaHRlXXQR46TeJpxJgjxZ mJPi4bJNoJ3MkdAL X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Pat Wall , rtd@a-eon.com, aperez@alexperez.com, Christian Zigotzky Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Commit 5c0484e25ec0 ('powerpc: Endian safe trampoline') added a macro 'FIXUP_ENDIAN' to head_64.S. The CFE on Nemo has a bug that shows up when this is included, the system hangs right after printing the initial memory map, before the CPU's are started. Clearing the long long at addr 8 has been shown to fix this, so add an initalisation to head_64.S so the system will boot. Signed-off-by: Darren Stevens diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 1dc5eae..032b317 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -79,6 +79,13 @@ _GLOBAL(__start) /* NOP this out unconditionally */ BEGIN_FTR_SECTION FIXUP_ENDIAN +#ifdef CONFIG_PPC_PASEMI_NEMO + /* + * Zero address 8 so Nemo will boot + */ + li r0,0 + std 0,8(0) +#endif b __start_initialization_multiplatform END_FTR_SECTION(0, 1)