[PATCH 1/6] arm: highbank: Limit FDT and initrd load addresses

Tom Rini trini at konsulko.com
Mon Apr 12 02:29:11 CEST 2021

On Mon, Apr 12, 2021 at 01:04:50AM +0100, Andre Przywara wrote:

> So far on Highbank/Midway machines U-Boot only ever uses 512MB of DRAM,
> even though the machines have typically 4GB and 8GB, respectively.
> That means that so far we didn't need an extra limit for placing the DTB
> and initrd, as the 512MB are lower than the kernel's limit ("lowmem",
> typically 768MB).
> With U-Boot now needing to learn about the actual memory size (to
> correctly populate the EFI memory map), it might relocate fdt and initrd
> to the end of DRAM, which is out of reach of the kernel.
> So add limiting values to the fdt_high and initrd_high environment
> variables, to prevent U-Boot from using too high addresses.
> Signed-off-by: Andre Przywara <andre.przywara at arm.com>

Reviewed-by: Tom Rini <trini at konsulko.com>

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