Dear Michele Venturi,

please keep the mailing list on Cc:

In message 908E0D8EBCBE4AAE9A5EFDCD66CE45A6@ebneuro.intranet you wrote:

Many thanks for your prompt support and suggestions ! I add comments I hope will be useful.

...

But of course U-Boot can load and uncompress the ramdisk image and pass the address of the uncompressed image to the kernel. See the FAQ.

I found that this feature works, but the had to be enabled (on my old 1.1.2 sources) for the CONFIG_AT91RM9200DK board target, or the Flash EEPROM to SDRAM.trasfer of uncompressed ramdisk image would be simply skipped...

This is intentional. It makes no sense to copy the image to RAM. The uncompressor can read the compressed data from flash as well.

This is true even for the recent u-boot-2008-tar.bz2 release:

As mentioned, this is intentional.

Of course it should be changed in :

#if defined(CONFIG_B2) || defined(CONFIG_EVB4510) || defined(CONFIG_ARMADILLO) || defined(CONFIG_AT91RM9200DK)

No, it should not be changed. Instead, the Linux kernel should be fixed to allow to take a compressed ramdisk from a flash address.

Again, as mentioned before: patches have been posted here several times before.

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Also keep in mind that turning of the checksums (verify=no) helps a bit.

This feature works, but it seems to me that the usage of the environment variable "verify" is not documented in the DULG manual.

It seems to me that you did not search carefully. See at http://www.denx.de/wiki/view/DULG/UBootEnvVariables :

verify: If set to n or no disables the checksum calculation over the complete image in the bootm command to trade speed for safety in the boot process. Note that the header checksum is still verified.

Best regards,

Wolfgang Denk