[OpenBIOS] [PATCH 1/3] sparc64: use direct interrupt mapping for PCI devices

[Blue Swirl]

On Sat, Apr 27, 2013 at 5:58 AM, Artyom Tarasenko <atar4qemu at gmail.com> wrote:
> Every PCI Slot in PBM has 4 directly mapped IRQ lines.
> Use the IRQ routing schema 0bssnn (Bus, Slot, interrupt Number)
> described in Section 19.3.3 of UltraSPARC™-IIi User's Manual.
>
> Please note that this patch requires the QEMU counterpart patch.
>
> Signed-off-by: Artyom Tarasenko <atar4qemu at gmail.com>
> ---
>  drivers/pci.c |    7 +++++++
>  1 files changed, 7 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/pci.c b/drivers/pci.c
> index 5c487c1..ec1a810 100644
> --- a/drivers/pci.c
> +++ b/drivers/pci.c
> @@ -854,7 +854,14 @@ static void ob_pci_add_properties(phandle_t phandle,
>         if (config->irq_pin) {
>                 OLDWORLD(set_int_property(dev, "AAPL,interrupts",
>                                           config->irq_line));
> +#if defined(CONFIG_SPARC64)
> +                /* direct mapping bssnn (Bus, Slot, interrupt Number */
> +                set_int_property(get_cur_dev(), "interrupts",
> +                                 ((((config->dev >> 11) << 2)
> +                                   + config->irq_pin - 1) & 0x1f));
> +#else

Maybe we should make a macro similar to OLDWORLD() and NEWWORLD() for Sparc64?

>                 NEWWORLD(set_int_property(dev, "interrupts", config->irq_pin));
> +#endif
>         }
>
>         set_int_property(dev, "min-grant", pci_config_read8(addr, PCI_MIN_GNT));
> --
> 1.7.1
>