ACPI: processor: factor out common _PDC settings

Both x86 and ia64 initialize _PDC with mostly common bit settings.

Factor out the common settings and leave the arch-specific ones alone.

Cc: Tony Luck <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c
index 87946b6da765..ccda7c95d073 100644
--- a/drivers/acpi/processor_pdc.c
+++ b/drivers/acpi/processor_pdc.c
@@ -33,6 +33,15 @@ static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = {
         {},
 };
 
+static void acpi_set_pdc_bits(u32 *buf)
+{
+        buf[0] = ACPI_PDC_REVISION_ID;
+        buf[1] = 1;
+
+        /* Enable coordination with firmware's _TSD info */
+        buf[2] = ACPI_PDC_SMP_T_SWCOORD;
+}
+
 static void acpi_processor_init_pdc(struct acpi_processor *pr)
 {
         struct acpi_object_list *obj_list;
@@ -63,6 +72,8 @@ static void acpi_processor_init_pdc(struct acpi_processor *pr)
                 return;
         }
 
+        acpi_set_pdc_bits(buf);
+
         obj->type = ACPI_TYPE_BUFFER;
         obj->buffer.length = 12;
         obj->buffer.pointer = (u8 *) buf;