[U-Boot] cuImage and multi image?

[Scott Wood]

On Tue, 21 Sep 2010 03:03:22 +0200
"Chen, Tiejun" <Tiejun.Chen at windriver.com> wrote:

> > -----Original Message-----
> > From: Shawn Jin [mailto:shawnxjin at gmail.com] 
> > Sent: Tuesday, September 21, 2010 1:53 AM
> > To: Chen, Tiejun
> > Cc: ppcdev; uboot
> > Subject: Re: cuImage and multi image?
> > 
> > >> I have a cuImage kernel in order to support legacy u-boot and a 
> > >> ramdisk image. Kernel boots fine if these two images are 
> > separate and 
> > >> "bootm $kernel $ramdisk" is used. But I can not make it to 
> > work using 
> > >> a single multi image that contains the kernel and ramdisk 
> > images. Is 
> > >> it even technically possible to boot a multi-image with cuboot 
> > >> wrapper?
> > >
> > > Try the following steps:
> > > ------
> > > 1. cp <your ramdisk.gz> arch/powerpc/boot/ramdisk.image.gz
> > > 2. make cuImage.initrd.<your target>
> > >
> > > You can get one Image, cuImage.initrd.<your target>, 
> > including kernel and ramdisk.
> > 
> > A follow up question. With this method, the total image size
> > (uncompressed) is limited to the 4MB (the link address of the 
> > boot wrapper)?
> 
> No.

Yes, unless you change the link address, or provide a vmlinux_alloc
callback (which currently only happens on true OF, not cuImage).

Unless you're talking about the "(uncompressed)"?  The limit applies to
the uncompressed boot image -- anything that the bootwrapper itself is
decompressing.  It does not apply to any further uncompression of the
ramdisk itself.

-Scott