Re: [U-Boot] porting u-boot, MMU question
Thank you for the responses guys, much appreciated. We will look into using the latest release. Another question... Can we still use setenv() in the board file? Before, we setup environment variables in board_late_intit() with setenv, but it doesn't seem to work in new u-boot I also tried it in board_early_init_f(), board_init() and checkboard(), to no avail. It works if I set it up in the header file, but I have conditionals in the board file to setup different environments, so just wondering if it's still possible. BTW I'm lobbying for my company to send me to denx for training :) -- View this message in context: http://u-boot.10912.n7.nabble.com/porting-u-boot-MMU-question-tp194761p194989.html Sent from the U-Boot mailing list archive at Nabble.com. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
[U-Boot] porting u-boot, MMU question
I'm trying to upgrade u-boot-2009.08 to u-boot-2014.07. Our board is loosely based on the Freescale mx53loco board. I used the old board file and config header files and moved them over to new u-boot directory. Then using the new api to make changes. I'm now trying to figure out how to port and turn on the MMU part below. I noticed the below code is not in the new mx53loco board file anymore and MMU_ON() doesn't exist either, since include/asm-arm/mmu.h is not included in new u-boot. So how do I get the same effect? I see arch/arm/cpu/armv8/cache_v8.c and arch/arm/lib/cache-cp15.c are the likely candidates? -- View this message in context: http://u-boot.10912.n7.nabble.com/porting-u-boot-MMU-question-tp194761.html Sent from the U-Boot mailing list archive at Nabble.com. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] porting u-boot, MMU question
Hi David, On 05/11/2014 17:36, DaveKucharczyk wrote: I'm trying to upgrade u-boot-2009.08 to u-boot-2014.07. Our board is loosely based on the Freescale mx53loco board. I used the old board file and config header files and moved them over to new u-boot directory. Then using the new api to make changes. I'm now trying to figure out how to port and turn on the MMU part below. I noticed the below code is not in the new mx53loco board file anymore and MMU_ON() doesn't exist either, since include/asm-arm/mmu.h is not included in new u-boot. Instead of doing this, I think it will be easier if you start from the current mx53loco nad make the customization for your board. Freescale's U-Boot (2009.08) and mainline diverged, as well as some internal API. So how do I get the same effect? I see arch/arm/cpu/armv8/cache_v8.c and arch/arm/lib/cache-cp15.c are the likely candidates? You do not need to care about that. Cache is activated per default with mx5/mx6, if you do not explicitely deactivate it in your config file. You do not need to bother about MMU setup in your board files. Best regards, Stefano Babic -- = DENX Software Engineering GmbH, MD: Wolfgang Denk Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sba...@denx.de = ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] porting u-boot, MMU question
Stefano, thank you for the very fast response. :) Stefano Babic wrote Instead of doing this, I think it will be easier if you start from the current mx53loco nad make the customization for your board. Freescale's U-Boot (2009.08) and mainline diverged, as well as some internal API. Initially that's what I wanted to do, but we have too many changes and I was told to do it this way. Needless to say it's very slow going. Stefano Babic wrote You do not need to care about that. Cache is activated per default with mx5/mx6, if you do not explicitely deactivate it in your config file. You do not need to bother about MMU setup in your board files. Ok thanks. Why did the old U-Boot (2009.08) loco board file have the MMU stuff and the new U-Boot (2014.07) loco board file doesn't? -- View this message in context: http://u-boot.10912.n7.nabble.com/porting-u-boot-MMU-question-tp194761p194767.html Sent from the U-Boot mailing list archive at Nabble.com. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] porting u-boot, MMU question
Hi Dave, On 05/11/2014 18:16, DaveKucharczyk wrote: Stefano Babic wrote You do not need to care about that. Cache is activated per default with mx5/mx6, if you do not explicitely deactivate it in your config file. You do not need to bother about MMU setup in your board files. Ok thanks. Why did the old U-Boot (2009.08) loco board file have the MMU stuff and the new U-Boot (2014.07) loco board file doesn't? It is not true. Old mainline U-Boot has never had that MMU stuff. U-Boot uses flat address space and MMU is setup only for enabling cache. If you check in mainline tree for the 2009.8 tag, you will find no MMU stuff at all. Your old U-Boot was delivered by the manufacturer and not supported by the community. Best regards, Stefano Babic -- = DENX Software Engineering GmbH, MD: Wolfgang Denk Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sba...@denx.de = ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] porting u-boot, MMU question
Hello Dave, On Wed, Nov 5, 2014 at 7:04 PM, Stefano Babic sba...@denx.de wrote: On 05/11/2014 18:16, DaveKucharczyk wrote: Stefano Babic wrote You do not need to care about that. Cache is activated per default with mx5/mx6, if you do not explicitely deactivate it in your config file. You do not need to bother about MMU setup in your board files. Ok thanks. Why did the old U-Boot (2009.08) loco board file have the MMU stuff and the new U-Boot (2014.07) loco board file doesn't? It is not true. Old mainline U-Boot has never had that MMU stuff. U-Boot uses flat address space and MMU is setup only for enabling cache. If you check in mainline tree for the 2009.8 tag, you will find no MMU stuff at all. Your old U-Boot was delivered by the manufacturer and not supported by the community. On top of that, I suggest you to use 2014.10 release as it includes a number of nice new features and bug fixes. It would also easy your next upgrade as it will reduce the amount of delta for next release, in case you want to move to it. -- Otavio Salvador O.S. Systems http://www.ossystems.com.brhttp://code.ossystems.com.br Mobile: +55 (53) 9981-7854Mobile: +1 (347) 903-9750 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
