[U-Boot] core ticks/timer code

[Wolfgang Denk]

Dear Mike Frysinger,

In message <200903272130.26825.vapier at gentoo.org> you wrote:
>
> unfortunately, there doesnt seem to be any docs on what exactly these 
> functions do so it's hard for me to verify/change any of it.

If in doubt, look it up in the PowerPC implementation. That's the
reference for what a half-way sane world could look like.

> my understanding is that:
>  - get_ticks - return some notion of "cpu ticks"
>  - get_tbclk - return number of "cpu ticks" that elapse in one second
>  - timer_init - setup a core timer
>  - get_timer(x) - not really sure what this is supposed to represent, or ho> w 
> "x" is used
>  - reset_timer - reset core timer to 0
>  - CONFIG_SYS_HZ - no idea how this relates to ticks/timer in U-Boot as in the 
> Linux world, this is the core timer (scheduler) frequency (how many times to 
> execute per second)

It's the number of ticks per second, i. e. 1000.

Best regards,

Wolfgang Denk

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