Hi Harald,
Please see my other e-mail response about this. I still believe there might be some wrong memory / bus / core clock timing and or voltage issues.
We changed the memory clock to a lower frequency(90MHz to 67MHz) and the the "Bad Data CRC" error has gone. Thanks alot. Our settings are: EXTCLK = 12MHz FCLK = 271 MHz HCLK = 67.75 MHz
please try to use u-boot's built-in memory verification code to veryify your memory before trying to boot a kernel on it.
We will do this now.
We are writing the kernel image directly to the ram to 33000000. Therefore as for now it is not copied from the flash.
Is the hardware a prototype of a new board, or is it proven, verified hardware?
Yes, the hardware is a new prototype.
The output now is as follows:
U-Boot 1..3.2 (Apr 7 2008 - 17:25:31)
DRAM: 128 MB Flash: 32 MB Using default environment
In: serial Out: serial Err: serial Hit any key to stop autoboot: 0 ## Booting image at 33000000 ... Image Name: Linux kernel Image Type: ARM Linux Kernel Image (gzip compressed) Data Size: 4278410 Bytes = 4.1 MB Load Address: 30008000 Entry Point: 30008000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK
Starting kernel ...
undefined instruction pc : [<30008018>] lr : [<310117bc>] sp : 30fcfa78 ip : 30fcffb8 fp : 00000000 r10: 00000001 r9 : 30fcfe18 r8 : 30fcffdc r7 : 31012ef4 r6 : 33000040 r5 : 31019514 r4 : 31019511 r3 : 30008000 r2 : 30000100 r1 : 0000016a r0 : 00000000 Flags: nzCv IRQs off FIQs off Mode SVC_32 Resetting CPU ...
U-Boot 1.3.2 (Apr 7 2008 - 17:25:31)
DRAM: 128 MB Flash: 32 MB Using default environment
In: serial Out: serial Err: serial Hit any key to stop autoboot: 0 ## Booting image at 33000000 ... Image Name: Linux kernel Image Type: ARM Linux Kernel Image (gzip compressed) Data Size: 4278410 Bytes = 4.1 MB Load Address: 30008000 Entry Point: 30008000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK
Starting kernel ...
undefined instruction pc : [<30008018>] lr : [<310117bc>] sp : 30fcfa78 ip : 30fcffb8 fp : 00000000 r10: 00000001 r9 : 30fcfe18 r8 : 30fcffdc r7 : 31012ef4 r6 : 33000040 r5 : 31019514 r4 : 31019511 r3 : 30008000 r2 : 30000100 r1 : 0000016a r0 : 00000000 Flags: nzCv IRQs off FIQs off Mode SVC_32 Resetting CPU ...
and it keeps on resetting. We further reduced the SDRAM frequency to 45 Mhz, but still the problem persist. Is it still the problem with the u-boot frequency or with the linux kernel?
Thanks again. Tiju
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