In message <[EMAIL PROTECTED]> you wrote:
>
> > Except for the declaration of the variable itself, *nothing* changes.
> > What do you mean would become simpler?
>
> A normal global variable is simpler than one that's tied to a specific
> register,
> wouldn't you say? I wasn't trying to be that insightful.
No, I wouldn't say that. To me a pointer that can live all the time in
a register is simpler than one that lives somewhere in a memory
location and has to be loaded for use - you can see this from the code
size as well.
Also, it's pretty convenient for debugging, for example when you need
to figure out where U-Boot was relocated to in RAM - just add the
offset in struct global_data and you have the relocation offset, for
example.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [EMAIL PROTECTED]
It is impractical for the standard to attempt to constrain the
behavior of code that does not obey the constraints of the standard.
- Doug Gwyn
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