[Armadillo:01539] Re: zImage and Armadillo-210

[friday@rise]

hi

In your source, ZRELADDR = 0xc0008000 TEXTADDR=0xc0018000.

In kernel, ZRELADDR is physical address of TEXTADDR. And according to
your kernel mapping mode, I change ZRELADDR to 0xc0018000.

Uncompress code is position dependent, but not kernel.

> and place it exactly the same place?

Yes, I think it's ok.

And if you can run your zImage kernel without changing source code,
please send the your zImage file to me.

Thanks.

On Fri, 2007-03-09 at 19:20 +0900, Yasushi SHOJI wrote:
> At Fri, 02 Mar 2007 16:17:16 +0900,
> email@hidden wrote:
> > 
> > hi
> > 
> > Recently I tried to compile zImage for Armadillo-210. But after program
> > it to flash, cannot boot.
> > 
> > I read the source code of linux-2.6.12.3-a9-8, I found a bug.
> > 
> > in arch/arm/mach-ep93xx/Kconfig
> > 
> > config EP93XX_ZREL_ADDR
> >         hex
> >         default 0x00008000 if EP93XX_SDCS3 && EP93XX_SYNC_BOOT
> >         default 0xc0008000 if EP93XX_SDCS0 // this address is not
> > correct, change it to 0xc0018000
> 
> thanks.  but we are not using the address above.
> 
> > After fix this problem, I still cannot not boot.
> > So I think maybe there are other bugs. At last I tested to gzip my
> > zImage.
> > 
> > ha, it worked.
> > 
> > So I think there is another bug in bootloader.
> 
> hmm... what we do, instread of using the kernel decompressor, is to
> let bootloader decompress the kernel image in the flash and place the
> decompressed kernel at appropriate address in DRAM.
> 
> I just don't understand how your code worked.
> 
>   - bootloader decompress the kernel image in flash
>   - place the kernel at 0xc0018000
>   - jump to 0xc0018000
>   - now kernel's decompressor takes over and start decompressing
>     itself
>   - and place it exactly the same place?