Hi, Recently I am start getting strange problem with u-boot-2011.09. MPC8313ERDB like configuration ( main change - I am using different NAND flash - 256MBib - need change page size)
If I am access NAND flash before nor u-boot not always read NOR correctly.
mtdparts
device nor0 <phys_mapped_flash>, # parts = 3 #: name size offset mask_flags 0: u-boot 0x000e0000 0x00000000 0 1: env 0x00020000 0x000e0000 0 2: jffs2 0x01f00000 0x00100000 0
device nand0 <e2800000.flash>, # parts = 1 #: name size offset mask_flags 0: ubifs 0x10000000 0x00000000 0
If I do: ubi part ubifs;ubifsmount iptec_nand
and read something from NAND before I read NOR
I am getting time to time after Linux update uImage:
run boot_cmd
### JFFS2 loading 'BANK1/uImage' to 0x100000 Scanning JFFS2 FS: . done. ### JFFS2 load complete: 4926025 bytes loaded to 0x100000 ### JFFS2 loading 'BANK1/vnp100_dtb.dtb' to 0x900000 ### JFFS2 load complete: 10205 bytes loaded to 0x900000 ## Booting kernel from Legacy Image at 00100000 ... Image Name: Linux-2.6.38.8 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4925961 Bytes = 4.7 MiB Load Address: 02000000 Entry Point: 02000000 Verifying Checksum ... Bad Data CRC ERROR: can't get kernel image!
but if I reset board and skip NAND access it always fine, some times I can add or remove some environment variable after NAND access and it boot even without reset:
run boot_cmd
### JFFS2 loading 'BANK1/uImage' to 0x100000 Scanning JFFS2 FS: . done. ### JFFS2 load complete: 4926025 bytes loaded to 0x100000 ### JFFS2 loading 'BANK1/vnp100_dtb.dtb' to 0x900000 ### JFFS2 load complete: 10205 bytes loaded to 0x900000 ## Booting kernel from Legacy Image at 00100000 ... Image Name: Linux-2.6.38.8 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 4925961 Bytes = 4.7 MiB Load Address: 02000000 Entry Point: 02000000 Verifying Checksum ... OK ## Flattened Device Tree blob at 00900000 Booting using the fdt blob at 0x900000 Uncompressing Kernel Image ... OK Loading Device Tree to 007fa000, end 007ff7dc ... OK
I found most stable configuration: mount NAND, read NAND, chaprt nor0,2 boot
and most unstable chaprt nor0,2 mount NAND, read NAND, boot
And I did increase malloc size to 1M.( ubifs does not like 128K). There is no option for stack size - it is PPC, so it should grow down as needed.
As long I am not mixing NOR and NAND evithing working perfect.
Any idea?
Thanks, Andrei