On Thu, Nov 28, 2013 at 06:35:00PM -0600, Dennis Gilmore wrote:
El Wed, 27 Nov 2013 08:53:55 +0100 Stefano Babic sbabic@denx.de escribi?:
Hi Otavio,
On 26/11/2013 13:16, Otavio Salvador wrote:
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 :-(
I missed this issue, too :-(
Does it work with your patch ? Most supported i.MX6 boards have more as 768MB, and I am wondering that all kernels can boot.
In fedora land we have not seen issues booting 3.10 3.11 3.12 or 3.13 in regards to things getting clobbered. but it does bring me back to my thought that u-boot should be calculating where to place everything to ensure that things do not get clobbered.
I know we talked on IRC yesterday, and this email predates that, but there's a lot of (potential) problems with "oh just let someone else figure out where to place things", such as "what is that thing going to do once it runs" ? I'm fine with (and would encourage) standardized names and a suggested base layout (ie memory base + 0x$FOO for ...)
Most fedora i.MX6 users are using wandboards with a few utilites.
our wandboard config uses
fdt_high=0xffffffff
Note that this disables relocation of the DT, which is what I was saying is the problem in the original patch, not the location.