[U-Boot] Refactoring of U-Boot directory structure

[Stephen Warren]

On 06/11/2014 10:10 PM, Masahiro Yamada wrote:
...
> Tegra uses different CPU  for SPL and Normal U-boot.
> That's why Tegra directories are sprinkled under arch/arm/:
> 
> arch/arm/cpu/arm720t/tegra-common/
> arch/arm/cpu/arm720t/tegra20/
> arch/arm/cpu/arm720t/tegra30/
> arch/arm/cpu/arm720t/tegra114/
> arch/arm/cpu/arm720t/tegra124/
> arch/arm/cpu/armv7/tegra-common/
> arch/arm/cpu/armv7/tegra20/
> arch/arm/cpu/armv7/tegra30/
> arch/arm/cpu/armv7/tegra114/
> arch/arm/cpu/armv7/tegra124/
> arch/arm/include/asm/arch-tegra/
> arch/asm/include/asm/arch-tegra20/
> arch/asm/include/asm/arch-tegra30/
> arch/asm/include/asm/arch-tegra114/
> arch/asm/include/asm/arch-tegra124/

This is a deliberate split so that we can control the code/data size of
the arm720t (SPL) parts of the code.

> They can be refactored
> 
> arch/arm/mach-tegra/                      : tegra common part
> arch/arm/mach-tegra/tegra20/         : tegra20-specific
> arch/arm/mach-tegra/tegra30/         : tegra30-specific
> arch/arm/mach-tegra/tegra114/       : tegra114-specific
> arch/arm/mach-tegra/tegra124/       : tegra124-specific
> 
> or  maybe
> 
> arch/arm/plat-tegra/               : tegra common part
> arch/arm/mach-tegra20/         : tegra20-specific
> arch/arm/mach-tegra30/         : tegra30-specific
> arch/arm/mach-tegra114/       : tegra114-specific
> arch/arm/mach-tegra124/       : tegra124-specific

If we refactor into that structure, the SPL/non-SPL separation will be
much less clear.