Dear Dirk Behme,
In message 49CDCCC1.5050503@googlemail.com you wrote:
- get_ticks - return some notion of "cpu ticks"
Yes. Returns the number of cpu ticks since power up. I.e. with 1000 ticks per second (CONFIG_SYS_HZ) the number of elapsed ms since power up.
Hey. What a chance. We have a wiki. Add that information.
Yes. Some implementations just return CONFIG_SYS_HZ which is supposed to be 1000.
get_ticks() makes no sense to me.
- timer_init - setup a core timer
Some implementations do this in interrupt_init(), too.
Let them do it, if they need it, and if they document why they need it.
- get_timer(x) - not really sure what this is supposed to represent, or how
"x" is used
See ppc code.
- 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)
CONFIG_SYS_HZ is supposed to be 1000
Does this make sense?
Yes, it makes sense that CONFIG_SYS_HZ is supposed to be 1000.
Best regards,
Wolfgang Denk