Re: sh implementation

[Jonathan Larmour <jifl at eCosCentric dot com>]

Suzuki, RyosIII wrote:
> Hello all,
>
> I have a question about HAL_RESET_CLOCK and HAL_INTERRUPT_
> ACKNOWREDGE in sh implementation.
>
> it seems sh's HAL_RESET_CLOCK clears interrupt cause. and
> HAL_INTERRUPT_ACKNOWREDGE does nothing. but in other 
> architectures, mips, arm, sparc, i386 ... I see
> HAL_RESET_CLOCK is used to reset clock counter not to clear 
> interrupt cause. HAL_INTERRUPT_ACKNOWREDGE is used to clear 
> interrupt cause.
>
> I feel that sh implementation is different from others.
> why?

I believe simply because it's hardware specific, and since the SH 
implementation uses the same on-chip clock everywhere, that's what it's in 
the arch HAL. So the HAL_CLOCK_RESET implementation just reflects what the 
hardware requires. Other hardware may have different requirements.

Oh, and as far I can see, all SH implementations of 
HAL_INTERRUPT_ACKNOWLEDGE do do something.

Jifl
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