On Tue, Nov 26, 2013 at 10:11 AM, Tom Rini <tr...@ti.com> wrote: > On Tue, Nov 26, 2013 at 09:06:27AM -0200, Otavio Salvador wrote: > >> This patch fixes allow for the DeviceTree and initrd relocation fixing >> the boot of FSL 3.10.9-1.0.0-alpha kernel. >> >> This changes following boards: >> >> - mx6sabreauto >> - mx6sabresd >> - wandboard >> - udoo >> - nitrogen6x >> - cgtqmx6eval >> >> The reasoning, as explained by Hui Liu, is: >> >> ,---- >> | The FDT blob will be placed at DDR physical addr: 0x11000000. When Linux >> kernel >> | Boot up, it will decompress the compressed kernel image and place the >> decompressed >> | kernel image at the low end of the DDR memory and start running from it. >> If the >> | decompressed kernel image is bigger for example than 16M, it may over >> written the >> | fdt blob which u-boot loaded to the DDR memory @0x11000000 with >> fdt_addr=0x11000000 >> | >> | To expand the fdt_addr from 0x11000000 to 0x18000000, which can avoid the >> override >> | Since we will not likely have one kernel image larger than 128MB. >> `---- >> >> Removing the fdt_high and initrd_high this allows for those to be >> relocated. > > I'm going to suggest this is the wrong path. Once you see i.MX systems > with > 768MB DDR you're going to have initrd/fdt placed into memory > Linux can't access without HIGHMEM on, and you need the FDT before then.
I didn't catch this case but it is a valid problem, indeed :-( Fabio/Stefano what is your call here? I think moving it to 128MB is good for now. -- Otavio Salvador O.S. Systems http://www.ossystems.com.br http://code.ossystems.com.br Mobile: +55 (53) 9981-7854 Mobile: +1 (347) 903-9750 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
