[U-Boot] Do we really need CONFIG_ARCH_CPU_INIT ?

Albert ARIBAUD albert.u.boot at aribaud.net
Thu Mar 1 21:48:10 CET 2012

Le 01/03/2012 14:23, Fabio Estevam a écrit :
> Hi,
> Currently CONFIG_ARCH_CPU_INIT is used to select arch_cpu_init() function.
> arch_cpu_init() does CPU level initialization, so why do we need to
> include CONFIG_ARCH_CPU_INIT in the include/configs/boardXYZ files,
> which are board related files ?
> For example:
> Let's say boards X, Y and Z are based on SoC S:
> 1. If processor S has a arch_cpu_init() defined, then it means that
> X,Y,Z need the code from arch_cpu_init() and then we need to define
> CONFIG_ARCH_CPU_INIT for each of these boards (actually all the boards
> based on this processor would need CONFIG_ARCH_CPU_INIT)
> 2. If not all boards need the code inside arch_cpu_init() for
> processor S, then it means that this code is not really CPU specific
> and then it should be moved to board code.

... or some of these boards have a kind of preloader that does CPU level 
inits before U-Boot is loaded, but other have not.

Plus, if a minority of boards for a given SoC can do without the 
arch_cpu_init(), then we'll duplicate code that may well be quite 
identical, won't we?


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