2016-10-29 0:32 GMT+09:00 york sun <york....@nxp.com>: > On 10/27/2016 10:11 PM, Scott Wood wrote: >> 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.masah...@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.masah...@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? >> > > Masahiro, > > If I read Scott correctly, he suggests to revert this patch and have the > those platforms who need to set initrd_high to do so. I wonder how many > of them exist. It makes sense to not restrict the loading if initrd_high > is not set. > > York
I think this part is completely messed up. Every developer (including me) expands or hacks it for his purpose without deep insight. I do not know why U-Boot relocates initrd and fdt to the tail of memory region. I want somebody to re-design it. -- Best Regards Masahiro Yamada _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
