[U-Boot] ARM64 Allwinner Binary Size

[Tom Rini]

On Tue, Dec 19, 2017 at 02:12:02PM +0100, Maxime Ripard wrote:
> On Tue, Dec 05, 2017 at 10:28:20AM +0000, Andre Przywara wrote:
> > So even though the actual u-boot.bin for 64-bit boards is still somewhat
> > below the limit (~480KB), adding the ATF image (~32KB) pushes it over
> > the edge. So since v2017.11 u-boot.itb is already too big for the
> > traditional MMC env location.
> 
> So I've had a quick look about what could go possibly go away in our
> current armv8 config (using the pine64+ defconfig). Let me know if
> some are actually vitals:
> 
>  - FIT_ENABLE_SHA256_SUPPORT
>  - CONSOLE_MUX
>  - CMD_CRC32
>  - CMD_LZMADEC
>  - CMD_UNZIP
>  - CMD_LOADB
>  - CMD_LOADS
>  - CMD_MISC (actually implementing the command sleep)
>  - ISO_PARTITION (yes. For CDROMs.)
>  - VIDEO_BPP8, VIDEO_BPP16
>  - VIDEO_ANSI
>  - SHA256
>  - LZMA
> 
> Removing those options make the u-boot.itb binary size going from
> 516kB to 478kB, making it functional again *and* allowing us to enable
> the DT overlays that seem way more important than any feature
> mentionned above (and bumps the size to 483kB).

You want to keep sha256 support in FIT images, we only have dropping
that allowed for some very odd use-cases.  And while I don't have a
strong opinion about unzip, lzma is one of the valid/likelu compressions
for an Image (and aside, I, or someone, needs to look into having
'booti' recognize various compression algorithms and automatically
decompress them) so I don't think we should get rid of that.

-- 
Tom
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