Very Thanks for your reply. I am sorry that this data is copied from Building Embedded Linux Systems book. Actually, the range of my flash is from 0xFF000000 to 0xFFFFFFFF. My starting address of Kernel is 0xFF000000, and the starting address of ramdisk image is FF200000, so the partitions is as following: 0xFF000000 - 0xFF1FFFFF Kernel 0xFF200000 - 0xFF9FFFFF RamDisk Image ( also my Root File System )
And I found my RootFS image is so big that waste many time while write it to flash. I hope I can use MTD to distribute it into two parts, Simple RootFS and libraries, but I don't know how to implement it? My CPU is MPC8241, and my kernel configure is base on Sandpoint_defconfig. Thanks, Johnson Cheng -----Original Message----- From: [EMAIL PROTECTED] [mailto:linuxppc-embedded-bounces at ozlabs.org] On Behalf Of Wolfgang Denk Sent: Monday, August 22, 2005 4:59 AM To: JohnsonCheng Cc: linuxppc-embedded at ozlabs.org Subject: Re: Linux Kernel MTD question In message <20050821080936.DA55167F92 at ozlabs.org> you wrote: > > Just as I know, we can have many partitions for our flash if we turn on MTD > in Kernel. For example: Right. > How could I distribute my RootFS into initrd1 and initrd2? You cannot. The *root* filesystem is always just a single file system. You can mount additional file systems on top of the directory hierarchy provided by your root file system, but this is something completely different. > In U-Boot command, bootcmd, I set it to "bootm 40000 100000". 40000 is > Kernel address, and 100000 is RootFS1 address. But where to set RootRS2 > address? There are several errors in this text. First, the kernel download address 0x40000 = 256kB is much too low and can never work. Second, the "100000" parameter is not a "RootFS1 address". It is the start address of a ramdisk image. This may or may not be your root file system, and it is usually NOT the address as seen by the kernel. And, 100000 = 1 MB is a much too low address and can never work. And finally: all this has absolutely NOTHING to do with MTD partitions. Best regards, Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de Documentation is like sex: when it is good, it is very, very good; and when it is bad, it is better than nothing. - Dick Brandon _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded at ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
