Hi Wolfgang, Thanks for your reply. Maybe I need try to generate the big endian format ramdisk... Any ideas of generating big endian format ramdisk on a intel PC?
Best regards, Mike On Fri, Dec 19, 2008 at 5:53 AM, Wolfgang Denk <w...@denx.de> wrote: > Dear "mike xu", > > In message <7103aeea0812181017j19966d84y22528f8728d5...@mail.gmail.com> you > wrote: >> >> Do you know that what u-boot shall do after passing 'root=/dev/ram0' >> to kernel? How kernel locates /dev/ram0? > > U-Boot starts the Linux kernel. > > How the Linux kernel receives it's parameters is more a Linux > specific question - so far, MIPS failed to com up with a standard > solution for this problem (at least I don't know one). > > You might even go ahead and make yourselkf a name in the community by > implementing device tree awarenes for MIPS ;-) > >> I want to use one ramdisk as my rootfs, but the kernel failed to mount >> the ramdisk, I set the u-boot parameter as below. >> setenv bootargs console=ttyS0,115200 root=/dev/ram0 ro mem=128M >> >> kernel reports errors: >> No filesystem could mount root, tried: ext2 cramfs squashfs romfs >> Kernel panic - not syncing: VFS: Unable to mount root fs on >> unknown-block(1,0) > > See previous message. > >> root=/dev/ram1 also failed... What's the difference between /dev/ram0 >> and /dev/ram1? > > It's the same as between /dev/sda and /dev/sdb - they are differend > devices. > >> And are there any requirement for the ramdisk image? Such as >> little/big endian, block size? > > Yes, of course there are such requirements - they have to match what > your kernel expects. > > 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: w...@denx.de > A woman should have compassion. > -- Kirk, "Catspaw", stardate 3018.2 > _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
