bootpImage error with 2.6.19.2

Hi, I am trying to create a bootpImage for 2.6 kernel. I was able to create it very easily with the command make ARCH=arm CROSS_COMPILE=$KERNEL_CROSS_COMPILE INITRD=./ ramdisk.ext2.gz bootpImage

To boot the board I had first used the nand read command from redboot and read the data as i had flashed it (or as my nand flash partitions are). nand read -f 0x100000 -b 0x100000 -l 0x2000000 then used exec -b 0x100000 -l 0x2000000 -c "console=ttymxc0,115200 root=/dev/ram rw"

But while booting the board I get the error "invalid compressed format (err=2)". I am reading 35Mb of data from nand flash, but my bootpImage size is only 12Mb. So partial reading is out of the question.

I found that this error is coming while decompressing the root fs. When i tried to reduce the rootfs size then i was able to boot successfully.

Is there is size limit for bootpImage? on the net i found that the max decompressed size of 4Mb. But i was able to boot with much larger size. See this

formatting link

Thanks, Subhasish

Reply to
subhasish
Loading thread data ...

Hi all,

Was able to solve it myself. It looks like when the root file system was decompressed the default location in ram where it was decompressed was getting overwritten by some means. Not sure how or why. To fix it I specified the location in ram where to decompress the initrd root file system by using the command make ARCH=arm CROSS_COMPILE=$KERNEL_CROSS_COMPILE INITRD=./ ramdisk.ext2.gz INITRD_PHYS=0xa1000000 bootpImage The parameter INITRD_PHYS specified the location where to decompress the root file system while the kernel boots. Also I used the following command to read from the NAND flash

nand read -f 0x100000 -b 0x100000 -l 0x2000000 then used exec -b 0x100000 -l 0x2000000 -r 0xa1000000 -s 0x1000000 -c "console=ttymxc0,115200 root=/dev/ram rw"

The command above specifies -b -> This is the location where I flashed the kernel -l -> Length of my kernel partition where I had flashed the bootp Image -r -> Physical location in ram where the ramdisk would get decompressed. -s -> length of my ramdisk image. Thanks, Subhasish Ghosh.

Reply to
subhasish

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.