Do you have a kernel and ramdisk and kernel command line that works on your board?
Yes, i have a working 3.0. kernel and ramdisk.img it is an android image.
Linux version 3.0.15 (root@yicsystem) (gcc version 4.4.3 (GCC) ) #1 SMP PREEMPT Thu Apr 25 14:28:59 KST 2013
kernel command line
# cat /proc/cmdline console=ttySAC1,115200n8 vmalloc=512M androidboot.console=ttySAC1
i built a kernel with same string.
Also is U-Boot and the kernel mainline?
u-boot based on U-Boot 2012.12-00000-g462762b-dirty with yse5250 platform changes
And i tried a mainline u-boot and it's does not working. Just an empty screen on terminal window.
2014/1/17 Detlev Zundel dzu@denx.de
Hi Alexander,
Also if flashed 3.12_zImage (same kernel, same sources, just zImage)
Ok, zImage doesn't have the uImage header, so we will not see any information nor will U-Boot be able to verify a checksum there.
reading kernel..device 0 Start 1063, Count 16384 MMC read: dev # 0, block # 1063, count 16384 ... 16384 blocks read: OK completed reading RFS..device 0 Count 17447, Start 2048 MMC read: dev # 0, block # 17447, count 2048 ... 2048 blocks read: OK completed Boot with zImage Wrong Ramdisk Image Format
Note that you also have a problem with your ramdisk, even if the kernel starts, it will likely not do much if it needs the ramdisk.
Starting kernel ...
And it's stucked at "Starting kernel ..."
Let's say "we don't see anything after Starting kernel ....". This is also a common case when the kernel cannot open an initial console. It may well be that the kernel runs but without a console you will see nothing. To diagnose this you'd need to be sure that "bootargs" is setup properly before booting the kernel.
Let's step back a bit. Do you have a kernel and ramdisk and kernel command line that works on your board? I.e. do we have a "working case" that we can retreat to for further tests? Also is U-Boot and the kernel mainline?
Cheers Detlev
-- The management question ... is not _whether_ to build a pilot system and throw it away. You _will_ do that. The only question is whether to plan in advance to build a throwaway, or to promise to deliver the throwaway to customers. - Fred Brooks, "The Mythical Man Month" -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu@denx.de