Re: [PATCH] Import updates from i386's i8259.c

[Sergei Shtylyov <sshtylyov@ru.mvista.com>]

Hello.

Maciej W. Rozycki wrote:

> > > +static struct irq_chip i8259A_chip = {
> > > +       .name           = "XT-PIC",
> > > +       .mask           = disable_8259A_irq,
> > > +       .unmask         = enable_8259A_irq,
> > > +       .mask_ack       = mask_and_ack_8259A,
> > > };
> >   I wonder whose idea was to call this device XT-PIC. XT never had dual 8259A
> > PICs and so was capable of handling only 8 IRQs. Dual 8259A was first used in
> > the AT class machines...
>  Ask Ingo, perhaps... ;-)
   Ask and be ignored. :-)

>  I think he was perfectly right, though -- this 
> is a pair of PC/XT-class PICs.
   Coupled as only in PC/AT-class machines. So, this XT qualification is 
actually meaningless. It's 8259A, that's all.
>  And with the "IO-APIC-edge" and 
> "IO-APIC-level" alternatives back when the concept of IRQ controllers was 
> introduced, "XT-PIC" rather than "8259A" sounded quite right.
   I don't follow you here.

>   Maciej
WBR, Sergei