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ACPI: Altix: ACPI _PRT support

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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: John Keller <jpk@sgi.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
John Keller 2006-12-22 11:50:04 -06:00 committed by Len Brown
parent a7ec3f5289
commit 3948ec9406
4 changed files with 10 additions and 0 deletions
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3
arch/ia64/kernel/acpi.c
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@ -590,6 +590,9 @@ void __init acpi_numa_arch_fixup(void)
*/ */
int acpi_register_gsi(u32 gsi, int triggering, int polarity) 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) if (has_8259 && gsi < 16)
return isa_irq_to_vector(gsi); return isa_irq_to_vector(gsi);

3
arch/ia64/sn/kernel/io_acpi_init.c
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@ -223,6 +223,9 @@ sn_io_acpi_init(void)
u64 result; u64 result;
s64 status; 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); acpi_bus_register_driver(&acpi_sn_hubdev_driver);
status = sal_ioif_init(&result); status = sal_ioif_init(&result);
if (status || result) if (status || result)

3
drivers/acpi/bus.c
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@ -561,6 +561,9 @@ static int __init acpi_bus_init_irq(void)
case ACPI_IRQ_MODEL_IOSAPIC: case ACPI_IRQ_MODEL_IOSAPIC:
message = "IOSAPIC"; message = "IOSAPIC";
break; break;
case ACPI_IRQ_MODEL_PLATFORM:
message = "platform specific model";
break;
default: default:
printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
return -ENODEV; return -ENODEV;

1
include/linux/acpi.h
View File

@ -47,6 +47,7 @@ enum acpi_irq_model_id {
ACPI_IRQ_MODEL_PIC = 0, ACPI_IRQ_MODEL_PIC = 0,
ACPI_IRQ_MODEL_IOAPIC, ACPI_IRQ_MODEL_IOAPIC,
ACPI_IRQ_MODEL_IOSAPIC, ACPI_IRQ_MODEL_IOSAPIC,
ACPI_IRQ_MODEL_PLATFORM,
ACPI_IRQ_MODEL_COUNT ACPI_IRQ_MODEL_COUNT
}; };