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[189.203.100.56]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-4a84315c1easm4639874fac.8.2026.10.26.08.31.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Oct 2026 08:31:40 -0700 (PDT) Date: Mon, 26 Oct 2026 09:31:38 -0600 From: Tom Rini To: Beleswar Padhi Cc: ilias.apalodimas@linaro.org, afd@ti.com, u-kumar1@ti.com, u-boot@lists.u-boot-project.org Subject: Re: [PATCH] arm: omap: Hardcode control_status register for OMAP54xx Message-ID: <20261026153138.GD624796@bill-the-cat> References: <20261026134848.1733598-1-b-padhi@ti.com> X-Archived-By: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="prTc0wRUTqExKO8E" Content-Disposition: inline In-Reply-To: <20261026134848.1733598-1-b-padhi@ti.com> X-Clacks-Overhead: GNU Terry Pratchett X-BeenThere: u-boot@lists.u-boot-project.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: U-Boot discussion List-Archive: List-Post: List-Help: List-Subscribe: , X-Spam-Status: No, score=-5.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_PASS autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 --prTc0wRUTqExKO8E Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Oct 26, 2026 at 07:18:48PM +0530, Beleswar Padhi wrote: > Currently, the control status register address is obtained from the > ctrl global pointer which points to DDR address 0x8086XXXX. The kernel > section from the fitImage is loaded to address 0x80008000. So, a larger > kernel image (~8.4 MB) overwrites the value at the address (0x8086XXXX) > pointed by the ctrl pointer. This corrupts the (*ctrl) value and CPU > goes into a data abort when it tries to access the data at addr=3D(*ctrl) Why is the ctrl global pointer using a seemingly random point in DDR and not something in U-Boot itself and so relocated and safe? --=20 Tom --prTc0wRUTqExKO8E Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTzzqh0PWDgGS+bTHor4qD1Cr/kCgUCat9yVQAKCRAr4qD1Cr/k Ck6bAQDmXYZ8UcHXiNNUV8uac0mTZsYTC/JvOsfmSOn++uBpMAD8Cmr6OVvpp1yM DIbBzDw/KwGlJZvb6fU88ymPdjiy0QU= =HaEo -----END PGP SIGNATURE----- --prTc0wRUTqExKO8E--