[U-Boot-Users] Problems loading ramdisk

Michael Sprauve mike_sprauve at yahoo.com
Sun Jun 11 06:36:43 CEST 2006

So just make sure I understand your response
1)The 50180000 address that I pass to the bootloader
is the location of where I stored my ramdisk image in
2)When I create the ramdisk.bin using mkimage, the
load address I used (using the -a option) is pass to
the kernel using the ATAG method along the size of the
3)Because of that, I won't need to use the "initrd"
parameter in my bootargs

If I understand all of that is correct, then I must be
missing something else, since after setting my
bootargs to "console=ttyS0,115200 root=/dev/ram0
mem=16M" I still the same error, where it seems the
kernel can't find the ramdisk location

"Kernel panic - not syncing: VFS: Unable to mount root
fs on unknown-block(1,0)"

--- Wolfgang Denk <wd at denx.de> wrote:

> In message
<20060609221556.35601.qmail at web37110.mail.mud.yahoo.com>
> you wrote:
> >
> > I have a very simple and somewhat embarassing
> question
> > regarding u-boot and loading a ramdisk. I am
> trying to
> ...
> > bootm 50040000 50180000
> ...
> ## Loading Ramdisk Image at 50180000 ...
>                             ^^^^^^^^
> The bootm command will pass the address of the
> ramdisk to  the  Linux
> kernel  using  the  appropriate  ATAGS  for  this.
> It also passes the
> correct memory size to use.
> > Kernel command line: console=ttyS0,115200
> > root=/dev/ram0 initrd=0x00800000,8M me
>                           ^^^^^^^^
> > m=64M at 0x00000000 hdc=noprobe hdd=noprobe
> ...thus you should not pass any  initrd=  and  mem= 
> options  on  the
> commandline unless you know *exactly* what you are
> doing.
> 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
> No problem is insoluble.
> 	-- Dr. Janet Wallace, "The Deadly Years", stardate
> 3479.4

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