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authorJohn Keller <jpk@sgi.com>2006-12-22 11:50:04 -0600
committerLen Brown <len.brown@intel.com>2007-01-04 12:18:19 -0500
commit3948ec9406f9a60a43d63f23f6f5284db6529b9c (patch)
tree85bad329fb23be9527492d773dc2ed64f3908d60
parenta7ec3f5289681e9d63b65db5f56857f998812b4b (diff)
downloadlinux-stericsson-3948ec9406f9a60a43d63f23f6f5284db6529b9c.tar.gz
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: John Keller <jpk@sgi.com> Signed-off-by: Len Brown <len.brown@intel.com>
-rw-r--r--arch/ia64/kernel/acpi.c3
-rw-r--r--arch/ia64/sn/kernel/io_acpi_init.c3
-rw-r--r--drivers/acpi/bus.c3
-rw-r--r--include/linux/acpi.h1
4 files changed, 10 insertions, 0 deletions
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 73ef4a85b861..ef2fe474f107 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -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);
diff --git a/arch/ia64/sn/kernel/io_acpi_init.c b/arch/ia64/sn/kernel/io_acpi_init.c
index 99d7f278612a..cb96b4ea7df6 100644
--- a/arch/ia64/sn/kernel/io_acpi_init.c
+++ b/arch/ia64/sn/kernel/io_acpi_init.c
@@ -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)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 279c4bac92e5..766332e45592 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -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;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 2b0c955590fe..91f1f2363870 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -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
};