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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)
{
if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
return gsi;
if (has_8259 && gsi < 16)
return isa_irq_to_vector(gsi);