On Tue, Apr 7, 2009 at 11:02 AM, os user <gnuse...@gmail.com> wrote: > Hi, > > The data in NAND chip(linux kernel and RootFS) is the same when > booting linux from U-Boot and from the simple loader. :-( > > On Sat, Apr 4, 2009 at 12:53 AM, Scott Wood <scottw...@freescale.com> > wrote: > > On Fri, Apr 03, 2009 at 02:44:03PM +0800, os user wrote: > >> I want to boot linux by a simplified bootloader. I use Atmel's ARM > >> chip (AT91SAM9RL64EK board). Now, I can boot linux with my small > >> program. The small program will parse the image generaed by "mkimage" > >> and copy the kernel bianry from NAND flash to SDRAM, construct the tag > >> list, disable I/D cache, disable interrupt and then jump to kernel > >> entry point. The system can startup, but when accessing rootfile > >> system(the rootfile system was also in the NAND chip), a lot of CRC > >> errors were found. See below, > >> mtd->read(0x1fb2c bytes from 0x1804d4) returned ECC error > >> mtd->read(0x1fa38 bytes from 0x3e05c8) returned ECC error > >> mtd->read(0x1f7dc bytes from 0x7c0824) returned ECC error > >> jffs2_scan_inode_node(): CRC failed on node at 0x007c37a4: Read > >> 0xd9b2bc33, calculated 0xda4805c1 > >> > >> and sometimes the sytem even crashed when R/W filesystem. > >> > >> But with the same linux kernel and rootfile system, if I use U-Boot to > >> boot linux, everything seems OK. > >> > >> Can anyone tell is there any trick that's related with linux NAND > >> driver in U-Boot? Or any suggestion to help me moving on? >
How about ECC calculation ? is it h/w (GPMC) or s/w ECC ? Regards, Shankar > > > > > Are you using the same software to program the NAND in each case? If > > not, perhaps they have a different OOB layout? > > > > -Scott > > > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot > -- With Regards, ShankarGanesh K . "The most beautiful thing we can experience is the mysterious. It is the source of all true art and science."
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