[U-Boot] FSL PowerPC platform: Not able to boot Linux with ramdisk size > 100MB

[Prabhakar Kushwaha]

Thanks Scott,

> -----Original Message-----
> From: Scott Wood
> Sent: Friday, October 28, 2016 10:41 AM
> To: Prabhakar Kushwaha <prabhakar.kushwaha at nxp.com>; u-
> boot at lists.denx.de; yamada.masahiro at socionext.com
> Cc: york sun <york.sun at nxp.com>
> Subject: Re: FSL PowerPC platform: Not able to boot Linux with ramdisk size >
> 100MB
> 
> On 10/27/2016 04:27 AM, Prabhakar Kushwaha wrote:
> > Hi Masahiro,
> >
> > I am not able to boot Linux onF PowerPC platform with ramdisk size > 100MB.
> > I tried u-boot master with top commit as "
> 5ac5861c4ba851b473e6a24940b412b397627d8d ".
> >
> > I tried git-bisect and figured out below patch causing this problem. If I revert
> this patch, Linux boots properly.
> >
> > commit 20e072f37402c17741f67d9693eaabdd835b80f2
> > Author: Masahiro Yamada <yamada.masahiro at socionext.com>
> > Date:   Thu Dec 17 17:19:35 2015 +0900
> >
> >     image: check "bootm_low" and "bootm_size" if "initrd_high" is missing
> >
> >     To boot Linux, we should prevent Initramdisk and FDT from going too
> >     high.
> >
> >     Currently, boot_relocate_fdt() checks "fdt_high" environment first,
> >     and then falls back to getenv_bootm_mapsize() + getenv_bootm_low()
> >     if "fdt_high" is missing.
> >
> >     On the other hand, boot_ramdisk_high() only checks "initrd_high" to
> >     get the address limit for the Initramdisk.  We also want to let this
> >     case fall back to getenv_bootm_mapsize() + getenv_bootm_low().
> >
> >     Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
> >
> > Please advise!!
> 
> On PPC the initrd does not need to be loaded within the boot mapping.
> This assumption of what the absence of initrd_high means is not
> universally appropriate.  Why not just set initrd_high on the platforms
> that need it?
> 

After setting initrd_high=0xffffffff\0. Now linux is working with > 100M.

--prabhakar