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[115.65.200.98]) by smtp.gmail.com with ESMTPSA id 142sm18611200pfz.196.2021.03.03.05.50.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Mar 2021 05:50:39 -0800 (PST) From: Stafford Horne To: Barebox Date: Wed, 3 Mar 2021 22:50:23 +0900 Message-Id: <20210303135026.3450789-2-shorne@gmail.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210303135026.3450789-1-shorne@gmail.com> References: <20210303135026.3450789-1-shorne@gmail.com> MIME-Version: 1.0 X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Openrisc , Ahmad Fatoum , Stafford Horne Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2001:8b0:10b:1:d65d:64ff:fe57:4e05 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-2.5 required=4.0 tests=AWL,BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 1/4] openrisc: Use movhi to zero registers X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) This is needed when running on FPGA as registers are not guaranteed to be initialized to 0. Using movhi allows to explicitly set 0. Signed-off-by: Stafford Horne --- arch/openrisc/cpu/start.S | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/openrisc/cpu/start.S b/arch/openrisc/cpu/start.S index 7ac790b05..c448d3775 100644 --- a/arch/openrisc/cpu/start.S +++ b/arch/openrisc/cpu/start.S @@ -37,10 +37,10 @@ .org 0x100 __reset: /* there is no guarantee r0 is hardwired to zero, clear it here */ - l.andi r0, r0, 0 + l.movhi r0, 0x0 /* reset stack and frame pointers */ - l.andi r1, r0, 0 - l.andi r2, r0, 0 + l.movhi r1, 0x0 + l.movhi r2, 0x0 /* set supervisor mode */ l.ori r3,r0,SPR_SR_SM -- 2.26.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox