[crosstool-ng/crosstool-ng] 1f5906: samples: add aarch64-rpi3-linux-gnueabi

[Richard Earnshaw (lists)]

On 03/03/16 20:33, Mike Ray wrote:
> Foundation forum mods and developers haven't mentioned whether
> boot-loader needs to be 64-bit as well.

In common with other 64-it systems, like x86 for example, to run a
64-bit application you need a 64-bit operating system, and to run a
64-bit operating system you need a 64-bit boot-loader.

The privilege levels in the system only support running 64-bit at one
privilege level if the level above it is running at 64-bit; and you can
only switch states as you enter a privilege level, so if your top-level
boot code isn't 64-bit you'll never be able to get back to that state.

R.

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