[U-Boot] [PATCH 2/2 RESEND] SPL: Allow user to disable CPU support library

[Scott Wood <scottwood@freescale.com>]

On 10/05/2011 04:44 PM, Tom Rini wrote:
> On Thu, Sep 22, 2011 at 1:52 AM, Marek Vasut <marek.vasut@gmail.com> wrote:
>> On Wednesday, September 21, 2011 01:31:28 AM Scott Wood wrote:
>>> Is it really such a burden to put something like
>>>
>>> #define CONFIG_SPL_ARCH_CPU
>>>
>>> in your board config header?
>>
>> Yes it's a burden. It's a burden to add this to all boards but one. It makes no
>> sense.
> 
> Looking at a pile of partially ported TI boards, I wonder if we don't need a few
> common SPL include files, setting this-and-that and then letting boards opt-out
> of these defaults (or just going it alone?) as needed.

A header with common opt-ins would be good -- possibly have a small
number of common "profiles" for typical types of SPL, and/or high-level
feature #ifdefs that #define the components required to enable them.

Also, an opt-out might be more palatable if it is local to this
particular CPU makefile, and indicates what specifically is being opted
out of -- what constitutes a "CPU support library" is vague from a
target-independent view.

I guess what you're really trying to replace is the initial entry code,
with something provided under board/?  Only the cpu makefile knows which
files are initial entry versus other CPU-specific things.

-Scott