[U-Boot] ARM64 Allwinner Binary Size

[Maxime Ripard]

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).

Let me know what you think,
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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