[U-Boot-Users] Problem uncompressing kernel image
Hi everybody!
I now have U-Boot running fine on my self designed, PPC603e-based board. In the next step I want to try to start a Linux kernel image. For the generation of it, I use the ELinOS embedded Linux distribution. This creates me the kernel image (v2.4) + the initial ram disk. For debugging I use the BDI-2000 JTAG debugger.
First, I start U-Boot from flash memory, located at 0xff800000. After it runs, I load the kernel multi-image to RAM, which is located from 0x00000000 to 0x007fefff, at address 0x00600000. Using the 'imi 0x00600000'-command, i get the output:
=> imi 0x00600000
## Checking Image at 00600000 ... Image Name: Multi-File Image Created: 2005-02-24 14:27:59 UTC Image Type: PowerPC Linux Multi-File Image (gzip compressed) Data Size: 1237870 Bytes = 1.2MB Load Address: 00010000 Entry Point: 00010000 Contents: Image 0: 333090 Bytes = 325.3 kB Image 1: 904766 Bytes = 883.6 kB Verifying Checksum ... OK
=>
Then I try to start the image:
=> bootm 0x00600000
## Booting image at 00600000 [ same as command before ]
Umcompressing Multi-File Image ... inflateInit2() returned -4 GUNZIP ERROR - must RESET board to recover
What could be the problem? I calculated the sizes and i am _nearly_ sure, that nothing is overwritten.
Hopefully, Sebastian Häpe
In message 2D9AB865A49FD511914700105A0EF67901C6F271@morse.smart.lfk.eads.net you wrote:
I now have U-Boot running fine on my self designed, PPC603e-based board.
Congrats.
First, I start U-Boot from flash memory, located at 0xff800000. After it runs, I load the kernel multi-image to RAM, which is located from 0x00000000 to 0x007fefff, at address 0x00600000.
Do you really have less than 8 MB of RAM? You will have hard times of getting Linux to run...
Using the 'imi 0x00600000'-command, i get the output:
=> imi 0x00600000
0x00600000 = 6 MB... Try a higher load address (assuming you have enough RAM).
What could be the problem? I calculated the sizes and i am _nearly_ sure, that nothing is overwritten.
I'm not. Get more RAM.
Best regards,
Wolfgang Denk
Wolfgang Denk wrote:
First, I start U-Boot from flash memory, located at 0xff800000. After it runs, I load the kernel multi-image to RAM, which is located from 0x00000000 to 0x007fefff, at address 0x00600000.
Do you really have less than 8 MB of RAM? You will have hard times of getting Linux to run...
Bollocks.
A 2.4 kernel + RAM disk will run nicely in 4 MB of RAM, you can cut that to 2 MB if you go the XIP route. It's no "harder" than setting it up on a board with >= 8 MB, other than the fact that you need to be judicious about what's included in your kernel and image.
Using the 'imi 0x00600000'-command, i get the output:
=> imi 0x00600000
0x00600000 = 6 MB... Try a higher load address (assuming you have enough RAM).
Not much higher he can go. Assuming the exact same image, a base of 0x006D0000 would put the end of the image at 0x007FE36E, just barely within limits.
What could be the problem? I calculated the sizes and i am _nearly_ sure, that nothing is overwritten.
I'm not. Get more RAM.
How large is your uncompressed RAM disk image? Trying to uncompress a 16 MB image into 8 MB of RAM is a BadThing(tm)...
-Cory
participants (3)
-
"Häpe, Sebastian, HRD/AB" -
Cory Tusar -
Wolfgang Denk