Commit 3948ec94 authored by John Keller's avatar John Keller Committed by Len Brown

ACPI: Altix: ACPI _PRT support

Provide ACPI _PRT support for SN Altix systems.

The SN Altix platform does not conform to the
IOSAPIC IRQ routing model, so a new acpi_irq_model
(ACPI_IRQ_MODEL_PLATFORM) has been defined. The SN
platform specific code sets acpi_irq_model to
this new value, and keys off of it in acpi_register_gsi()
to avoid the iosapic code path.
Signed-off-by: default avatarJohn Keller <jpk@sgi.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent a7ec3f52
......@@ -590,6 +590,9 @@ void __init acpi_numa_arch_fixup(void)
*/
int acpi_register_gsi(u32 gsi, int triggering, int polarity)
{
if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
return gsi;
if (has_8259 && gsi < 16)
return isa_irq_to_vector(gsi);
......
......@@ -223,6 +223,9 @@ sn_io_acpi_init(void)
u64 result;
s64 status;
/* SN Altix does not follow the IOSAPIC IRQ routing model */
acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
acpi_bus_register_driver(&acpi_sn_hubdev_driver);
status = sal_ioif_init(&result);
if (status || result)
......
......@@ -561,6 +561,9 @@ static int __init acpi_bus_init_irq(void)
case ACPI_IRQ_MODEL_IOSAPIC:
message = "IOSAPIC";
break;
case ACPI_IRQ_MODEL_PLATFORM:
message = "platform specific model";
break;
default:
printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
return -ENODEV;
......
......@@ -47,6 +47,7 @@ enum acpi_irq_model_id {
ACPI_IRQ_MODEL_PIC = 0,
ACPI_IRQ_MODEL_IOAPIC,
ACPI_IRQ_MODEL_IOSAPIC,
ACPI_IRQ_MODEL_PLATFORM,
ACPI_IRQ_MODEL_COUNT
};
......
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