[PATCH v2] image: fdt: Fix DT relocation handling with multiple DRAM banks with gap

[Tom Rini]

On Fri, Apr 08, 2022 at 02:09:19AM +0200, Marek Vasut wrote:

> The current implementation of boot_relocate_fdt() places DT at the
> highest usable DRAM address, which is calculated as:
>   env_get_bootm_low() + env_get_bootm_mapsize()
> which by default becomes gd->ram_base + gd->ram_size.
> 
> Systems like i.MX53 can have multiple DRAM banks with gap between them,
> e.g. have DRAM at 0x70000000-0x8fffffff and 0xb0000000-0xcfffffff , so
> for them the calculated highest DRAM address is 0xafffffff, which is
> exactly in the gap and thus not usable.
> 
> Fix this by iterating over all DRAM banks and tracking the remaining
> amount of the total mapping size obtained from env_get_bootm_mapsize().
> Limit the maximum LMB area size to each bank, to avoid using nonexistent
> DRAM.
> 
> Reviewed-by: Simon Glass <sjg at chromium.org>
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Heinrich Schuchardt <xypron.glpk at gmx.de>
> Cc: Simon Glass <sjg at chromium.org>
> Cc: Tom Rini <trini at konsulko.com>

Applied to u-boot/master, thanks!

-- 
Tom
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