Re: hw/ppc/mac_newworld: Problem with Uninorth IRQ lines

[Mark Cave-Ayland]

On 21/02/2023 13:44, Philippe Mathieu-Daudé wrote:

> Hi Mark,
>
> The mac99 machines use the same PIC input IRQs for the Uninorth
> output IRQs:
>
> 379     if (PPC_INPUT(env) != PPC_FLAGS_INPUT_970) {
> 380         /* Uninorth AGP bus */
> 381         for (i = 0; i < 4; i++) {
> 382             qdev_connect_gpio_out(uninorth_agp_dev, i,
> 383                                   qdev_get_gpio_in(pic_dev, 0x1b + i));
> 384         }
> 385
> 386         /* Uninorth internal bus */
> 387         for (i = 0; i < 4; i++) {
> 388             qdev_connect_gpio_out(uninorth_internal_dev, i,
> 389                                   qdev_get_gpio_in(pic_dev, 0x1b + i));
> 390         }
> 391     }
>
> Did you mean to use an OR gate here?

Hi Phil,

These are separate PCI buses so I suspect they should be wired up with different 
IRQs, but this wiring has been the same ever since the code was introduced. I think 
it should be possible to dig the values out from a suitable device tree but it's not 
something I've looked at in any detail.


ATB,

Mark.