Hi ZoltÃn, ZoltÃn KÃcsi wrote: > On Mon, 4 Apr 2011 13:13:31 +0200 > > Juergen Beisert <jbe@xxxxxxxxxxxxxx> wrote: > > Hi ZoltÃn, > > > > ZoltÃn KÃcsi wrote: > > > Thanks for all the answers for my previous questions! > > > > > > The 'next' branch indeed boots from the NAND FLASH like a charm. > > > > \o/ > > > > Just for my list of tested min2440 variants: What type of SDRAMs and > > NAND is your system using? > > The SDRAM is Micron 48LC16M16A2-75, the NAND is Samsung K9F1G08U0B. > > Actually, taking a look at the RAM datasheet of the reveals that with a > 3 clock RAS->CAS latency the chip can can merrily work with a 133MHz > bus clock, so the S3C's FCLK could be boosted up to 532MHz. A > 30% speed increase is not something to sneeze on... You can try. But when I read the datasheet, most of the time they only talk about 400 MHz max. CPU clock, and never about 533 MHz any more. BTW: The average data throughput of a SDRAM running at 133 MHz @ CL3 is lower than of a SDRAM running at 100 MHz @ CL2. The CL3 hurts more than you will win with the increased clock. > >[...] > > > > "/env/config" for parameterization. Maybe these file will help you to > > understand how it works. > > I'll try my bestto grok them :-) > > > So, the changes in your environment are lost after reboot? > > Yes. > > > Do you see any kind of error message (like CRC sum errors)? when > > barebox comes up after reset and tries to load the saved environment? > > No. Here's what goes on, with unimportant stuff deleted: > > mini2440:/ printenv > locals: > machine=mini2440 > [...] > nfsroot=:/path/to/nfs/root > [...] > globals: > PATH=/env/bin > > mini2440:/ nfsroot=/some/other/root > mini2440:/ PATH=$PATH:/some/location > mini2440:/ printenv > locals: > [...] > nfsroot=/some/other/root > [...] > globals: > PATH=/env/bin:/some/location > > mini2440:/ saveenv > saving environment Ahh, no I see the problem: You did not change anything in the environment. You are using barebox, not u-boot! Try to edit the /env/config file at your mini2440 instead: mini2440:/ edit /env/config mini2440:/ saveenv Think in scripts now, not in environment variables any more. Regards, Juergen -- Pengutronix e.K. | Juergen Beisert | Linux Solutions for Science and Industry | Phone: +49-8766-939 228 | Vertretung Sued/Muenchen, Germany | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de/ | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
