[U-Boot] [PATCH] ARM: rmobile: Convert to bootm_size

[Tom Rini <trini@konsulko.com>]

On Tue, Nov 27, 2018 at 01:10:54AM +0100, Marek Vasut wrote:

> Convert all Renesas R-Car boards to bootm_size of 256 MiB and drop both
> fdt_high and initrd_high. This change implies that the FDT and initrd
> will always be copied into the first 256 MiB of RAM instead of being
> used in place, which can cause various kinds of inobvious problems.
> 
> The simpler problems include FDT or initrd being overwritten or being
> used from unaligned addresses, especially on ARM64. The overhead of
> copying the FDT to aligned location is negligible and these problems
> go away, so the benefit is significant.
> 
> Regarding alignment problems with fitImage. The alignment of DT properties
> is always 32 bits, which implies that the alignment of the "data" property
> in fitImage is also 32 bits. The /incbin/ syntax plays no role here. The
> kernel expects all elements, including DT and initrd, to be aligned to
> 64 bits on ARM64, thus using them in place may not be possible. Using the
> bootm_size assures correct alignment, again with negligible overhead.
> 
> Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
> Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
> Cc: Tom Rini <trini@konsulko.com>

Thanks!

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

-- 
Tom
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