Sorry for top posting. I am on outlook web access.
There may be some limitation on fdt relocation. Without setting fdt_high, u-boot relocates the device tree toward the end of useable memory. I haven't got a chance to debug why it doesn't work.
This patch is to disable the relocation by default. A magic number 0xa0000000 doesn't make much sense here.
York
________________________________________ From: Scott Wood oss@buserror.net Sent: Monday, February 29, 2016 4:00 PM To: york sun; U-Boot Mailing List Cc: Prabhakar Kushwaha Subject: Re: [U-Boot] [PATCH 2/2] boards: ls2080: Disable fdt copying by default
On Mon, 2016-02-29 at 15:58 -0800, York Sun wrote:
If set, fdt_high restricts the address used by copying device tree. It doesn't help much to set a default address without knowing how much memory is available, or how memory is used. Setting fdt_high to a specical value (0xffffffffffffffff) disables this copying.
Signed-off-by: York Sun york.sun@nxp.com
Is there a limit that Linux needs the fdt to be under?
I'd hope fdt_high wouldn't cause the device tree to be relocated beyond the end of memory, or in reserved memory...
-Scott