Hi Wolfgang, Thank you for your quick response. Actually I need to get one image which composed by the kernel ramdisk image. I'd like to use the ramdisk as root file system. The combined imageg is made by `mkimage -T multi...` command... And I found that the image can not startup successfully (kernel is ok but cannot mount the rootfs). Then I tried to bootup the kernel and ramdisk separately as I describe in the previous email.
Do you have any suggestion on how to bootup a multiple type image via u-boot? Best regards & Thanks again, Mike On Wed, Dec 17, 2008 at 11:35 PM, Wolfgang Denk <[email protected]> wrote: > Dear "mike xu", > > In message <[email protected]> you > wrote: >> >> I am using u-boot 1.2.0 and tried to boot kernel with one ramdisk, but >> it seems the u-boot doesn't load my ramdisk image at all. Please view > > This is correct. U-Boot does not load the RAMdisk image - why should > it? If the image is stored in NOR flash memory, the kernel can read > it there as well, so copying it to RAM before starting Linux would be > just a waste of boot time. > > U-Boot just passes tha ramdisk address to the Linux kernel - assuming > your ports of U-Boot and Linux for your MIPS board support this > correctly. > >> Are there any special requirement of the ramdisk format for u-boot? I >> used mips mkimage command as below and both of the ramdisk.gz in ext2 >> or cramfs format are all failed. >> mkimage -O linux -A mips -T ramdisk -C gzip -n 'Test Ramdisk Image' >> -d ramdisk.gz uRamdisk > > This is OK. Maybe you are using a kernel version that cannot use a > ramdisk image from flash (i. e. it finds it only in RAM, like the > vanilla ARM kernel does, too). > > Patche sto fix that (for ARM) have been posted several timers before, > search the archives if needed. > > Best regards, > > Wolfgang Denk > > -- > DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel > HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany > Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [email protected] > "Data is a lot like humans: It is born. Matures. Gets married to > other data, divorced. Gets old. One thing that it doesn't do is die. > It has to be killed." - Arthur Miller > _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
