[E3-hacking] [RFC][PATCH v2 1/5] omap1: Amstrad Delta: add FIQ handler for serial keyboard port interrupt processing
ralph at inputplus.co.uk
Wed Mar 31 01:06:57 BST 2010
> And thanks for pushing me into reading the ARM Assembly Language book,
> so I would be able to do more than just understanding and copy-pasting
> the code ;).
It's a lovely instruction set compared to many others.
> > > +state:
> > > + ldr r10, [r9,#FIQ_STATE]
> > > + cmp r10, #0 @ are we expecting start bit?
> > > + bne data @ no - in data processing state
> > Similarly, an `ldrs' here would make the cmp redundant.
> I'm not sure if the S suffix is also valid for memory transfer
No, you're correct. Memory transfers can't do the "set ALU flags"
S-bit. Sorry to mislead.
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