From patchwork Tue Aug 4 11:09:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heinrich Schuchardt X-Patchwork-Id: 1340806 X-Patchwork-Delegate: uboot@andestech.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=gmx.de Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; secure) header.d=gmx.net header.i=@gmx.net header.a=rsa-sha256 header.s=badeba3b8450 header.b=SjjQ6+I9; dkim-atps=neutral Received: from phobos.denx.de (phobos.denx.de [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4BLX8j0Lf8z9sR4 for ; Tue, 4 Aug 2020 21:09:56 +1000 (AEST) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 05FB881BD7; Tue, 4 Aug 2020 13:09:52 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=gmx.de Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=pass (1024-bit key; secure) header.d=gmx.net header.i=@gmx.net header.b="SjjQ6+I9"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id 1B37581C17; Tue, 4 Aug 2020 13:09:50 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,FREEMAIL_FROM,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.2 Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id EA09B81B7F for ; Tue, 4 Aug 2020 13:09:46 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=gmx.de Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=xypron.glpk@gmx.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1596539379; bh=3QDeHSlNKU/Sc7AxGbCJ0Py/5AZShAaxvp/rd+5Vvqs=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date; b=SjjQ6+I9izcvOjbFqfkhfXNCyEhG/TGt6KnlekzhFkaR0GzUCocbNo+doSQeAj4Po y7t/H2BAWACI8bO/kJGMt4A6Yls4OjvhAVhrYx7QDBo4qlgn+qRN/RgMfoDBU1+w9x /lu08mvHRlUFHjG1X+lgnYK269kpZLeZYqz42+lw= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from workstation4.fritz.box ([178.202.41.107]) by mail.gmx.com (mrgmx105 [212.227.17.174]) with ESMTPSA (Nemesis) id 1Md6Mt-1kcWgr3SXj-00aFGA; Tue, 04 Aug 2020 13:09:38 +0200 From: Heinrich Schuchardt To: Rick Chen Cc: u-boot@lists.denx.de, Heinrich Schuchardt Subject: [PATCH 1/1] cmd: exception: unaligned data access on RISC-V Date: Tue, 4 Aug 2020 13:09:33 +0200 Message-Id: <20200804110933.4747-1-xypron.glpk@gmx.de> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 X-Provags-ID: V03:K1:stjTdWIkYauvOgIt1IaddpmW6qkrjXqDYT2vOJYd6cnCjSUpfB7 PIYA8wtP2v3rNEwgGALplOhJnqct92qmQ0vX6T43RUuKqGbd0306bgkwtqisWLIEiatnSdG /CPltAlWQFvvy3rOJEDCcp22tZHBRYg8YllGK82tG1X+MHsRiIlrpaR6T2VHIjJA3YId4LC p7bhKTIg7Rvv3UMiS63SQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:Sou6Pqybyf4=:muZIB0lNwaV2blzlEPHpXC 5JiU+lxkT1Nbhve5+sO0q31HDwxZlRXzQwQqutoKWW0Zh8hUrZfn59m7GbSPZdqD2mOqElbZe Br8iZHLGMy23rkZCkzssCuWgtxL9Owk/a52QanIUOQDQHbzrNDQb6AbBFsL4e6B2j4S8DMPjG lTWpLk/yTe13xbEmW3H0pQkOD8rJVXNl7gRY+0hw1GAVIh9L9E19NISOcG0I33XB/lxVp3+Nv cZ0eCLO7zU3YDNZRtfrsahGq0OY9LKNNWUwLThgjbfeH1PCTyUoH3ziHufOw46VKUANLGdcQl HSI9KdqlKS8gMTgoF+s2NJWujQrS2vdjU3vzU1IbUEhs6yfKK8cYlWlK0aNDRQ1e/3akH8NOw hzjmuOEpL0EGIGsZ9qFdu5nkH9pkVt7gVfiEwa1lJYhCbyux2uRxzo+C+2aMHhExlTEQ9koj2 uoq+x9/40MtyPeaJ/Pr/bGRcq7Rs1kHwBNDo4+R9bDyQYSo0GoIWEI38g5//IMMo+JyIXNeEg azkOdzMpKJT63fnpWxFkEzU3kYt9AOWuliPgxyyOXfG/oPZtjDmO56L06Qa0t1BlWATMMlzty 5LavRhIKAodCOW68avUofvuNqnPolLuYBXJGRujSyAroRQmdUsjWgOMqou8Kq8FJA+SEHpUV4 0iJQPxkl5ct6V/zeLgxacSB45lVcJZLaJiULa6LvtuK87lZnNqkEdUFuuJg8XoNt+QSPV9Max L+eur/hW6Jay6kz2g0MGyZTLtmWUOAVBm6LrkYnsbjXDjZ72xP4KJJSeo7tZaN6nalMi02X5L dSSraQ/GQQssuThP5AHqex1pzfEP1jAk6IIu6xnC3fb9QoPdvjVqR91idd6D4kMRS1IqM38d3 d61/xWMc/2XW7vqxGitjf6CZiFybGl3JttRmrS/0GPss4Cij+r/gz5wFafEBp1CanpI36t9/w hf06M/SU5HZqOZimUgb7dW+DLygz5hYOiDGvUyw+MD7YOD08FczGjHSBgzFJOcqLb4MaXnbu2 77uoXCwblc3G3ZOwsusKjGyiSahaUhoULMiTm19JayPnM9B+HddN9uIbNlK3OStI/qB/sF90l ko5YtBUGwmeA6DQy3PyE3+bptMDhMQ72N8PHoP0p+R9J+F7wV1/Sd8Su9E1dwJzDO3t+KFRTU IMP5tofMUtryIFBmaLinsLdjDZEM+WYvEduxvACSf3C6zkZG5MoF6BjRe66v5avvkVOHep/02 uQ4DvS/j8drZatBVC9r6/kwyk6pAG9SOZRkr2Fw== X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.34 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.102.3 at phobos.denx.de X-Virus-Status: Clean The command 'exception' can be used to test the handling of exceptions. Currently the exception command only allows to create an illegal instruction exception on RISC-V. Provide a sub-command 'exception unaligned' to cause a misaligned load address exception. Adjust the online help for 'exception undefined'. Signed-off-by: Heinrich Schuchardt --- cmd/riscv/exception.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) -- 2.27.0 diff --git a/cmd/riscv/exception.c b/cmd/riscv/exception.c index 3c8dbbec0e..53159531d9 100644 --- a/cmd/riscv/exception.c +++ b/cmd/riscv/exception.c @@ -8,6 +8,17 @@ #include #include +static int do_unaligned(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + asm volatile ( + "auipc a1, 0\n" + "ori a1, a1, 3\n" + "lw a2, (0)(a1)\n" + ); + return CMD_RET_FAILURE; +} + static int do_undefined(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { @@ -16,6 +27,8 @@ static int do_undefined(struct cmd_tbl *cmdtp, int flag, int argc, } static struct cmd_tbl cmd_sub[] = { + U_BOOT_CMD_MKENT(unaligned, CONFIG_SYS_MAXARGS, 1, do_unaligned, + "", ""), U_BOOT_CMD_MKENT(undefined, CONFIG_SYS_MAXARGS, 1, do_undefined, "", ""), }; @@ -23,7 +36,8 @@ static struct cmd_tbl cmd_sub[] = { static char exception_help_text[] = "\n" " The following exceptions are available:\n" - " undefined - undefined instruction\n" + " undefined - illegal instruction\n" + " unaligned - load address misaligned\n" ; #include