From: Alexandre Gambier Date: Thu, 10 Feb 2011 09:12:49 +0100 Subject: [U-Boot] NOR sectors are not all protected as they should be. In-Reply-To: <20110209185005.4C4CF14B9A39@gemini.denx.de> References: <4D52BA80.4060405@ftemaximal.fr> <20110209185005.4C4CF14B9A39@gemini.denx.de> Message-ID: <4D539E01.6070500@ftemaximal.fr> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Wolfgang, Thanks for your reply and your help. On 02/09/2011 07:50 PM, Wolfgang Denk wrote: > >> The first sectors #0,1,2,3 are protected and sectors #8,9 (U-Boot >> environment) are protected. >> It should be sectors #0,1,2,3,4,5,6,7 and sectors #8,9. > No, it should not. Only the sectors that actually contain the U-Boot > code and environment are protected. Obviously your image is small > enough to fit in the first 4 sectors (= 256 KiB). Actually this is a > perfectly normal size, and your reservation of 512 KiB was just a > waste of memory. You can see that the following sectors are unused > from the 'E' (= empty) flag. Even if the first 4 sectors are empty they are protected (see below). So the protected sectors are not selected depending on if U-Boot is burnt in them, isn't it ? Sector Start Addresses: A0000000 E RO A0010000 E RO A0020000 E RO A0030000 E RO A0040000 E A0050000 E A0060000 E A0070000 E A0080000 RO A0090000 E RO A00A0000 E A00B0000 E A00C0000 E A00D0000 E A00E0000 E A00F0000 E A0100000 E A0110000 E A0120000 E A0130000 E A0140000 E A0150000 E A0160000 E A0170000 E A0180000 E A0190000 E A01A0000 E A01B0000 E A01C0000 E A01D0000 E A01E0000 E A01F0000 E A0200000 E A0210000 E A0220000 E I know my image fit in 256KiB, my image is 220KiB that I reserved more space just in case for the future releases. > When they don't contain any code, there is also no need to pretect > them, right? It should be, but it's not completely true. Best regards. > > Best regards, > > Wolfgang Denk >