Re: [U-Boot] NOR sectors are not all protected as they should be.
Ok. Thank you very much. On 02/10/2011 10:48 AM, Wolfgang Denk wrote: > Dear Alexandre Gambier, > > In message<4d539e01.6070...@ftemaximal.fr> you wrote: >>> 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 ? > No, they are selected based on the real size of the (running) U-Boot > image. > > Best regards, > > Wolfgang Denk > ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] NOR sectors are not all protected as they should be.
Dear Alexandre Gambier, In message <4d539e01.6070...@ftemaximal.fr> you wrote: > > > 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 ? No, they are selected based on the real size of the (running) U-Boot image. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de Of course there's no reason for it, it's just our policy. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] NOR sectors are not all protected as they should be.
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: A000 E RO A001 E RO A002 E RO A003 E RO A004 E A005 E A006 E A007 E A008 RO A009 E RO A00A E A00B E A00C E A00D E A00E E A00F E A010 E A011 E A012 E A013 E A014 E A015 E A016 E A017 E A018 E A019 E A01A E A01B E A01C E A01D E A01E E A01F E A020 E A021 E A022 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 > ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] NOR sectors are not all protected as they should be.
Dear Alexandre Gambier, In message <4d52ba80.4060...@ftemaximal.fr> you wrote: > Hello, > > I'm using U-Boot with a NOR and a NAND Flash. > > U-Boot is stored into the NOR flash. > The NOR flash is setup as : > > 0xA000 -> 0xA008 -> 512k -> 8 sectors -> reserved for U-Boot.bin > 0xA008 -> 0xA00A -> 128k -> 2 sectors -> reserved for U-Boot > environment > > If I use the command `flinfo` to see which sectors are protected I see > this... > > Sector Start Addresses: >A000 RO A001 RO A002 RO A003 RO A004 E >A005 E A006 E A007 E A008 RO A009 E > RO >A00A E A00B E A00C E A00D E A00E E >A00F E A010 E A011 E A012 E A013 E ... > > 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. When they don't contain any code, there is also no need to pretect them, right? Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de What about WRITING it first and rationalizing it afterwords? :-) - Larry Wall in <8...@jpl-devvax.jpl.nasa.gov> ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
