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 <[email protected]> > Cc: Nobuhiro Iwamatsu <[email protected]> > Cc: Tom Rini <[email protected]>
Thanks! Reviewed-by: Tom Rini <[email protected]> -- Tom
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