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authorAlex Chiang <achiang@hp.com>2009-12-20 12:19:19 -0700
committerLen Brown <len.brown@intel.com>2009-12-22 03:24:11 -0500
commit407cd87c54e76c266245e8faef8dd4a84b7254fe (patch)
treee07067c0d51317a4dc93144f1d16c050a0f5ca89 /drivers/acpi
parent1d9cb470a755409ce97c3376174b1e234bd20371 (diff)
ACPI: processor: unify arch_acpi_processor_init_pdc
The x86 and ia64 implementations of arch_acpi_processor_init_pdc() are almost exactly the same. The only difference is in what bits they set in obj_list buffer. Combine the boilerplate memory management code, and leave the arch-specific bit twiddling in separate implementations. 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>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/processor_pdc.c45
1 files changed, 44 insertions, 1 deletions
diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c
index 931e735e9e3..87946b6da76 100644
--- a/drivers/acpi/processor_pdc.c
+++ b/drivers/acpi/processor_pdc.c
@@ -33,6 +33,49 @@ static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = {
{},
};
+static void acpi_processor_init_pdc(struct acpi_processor *pr)
+{
+ struct acpi_object_list *obj_list;
+ union acpi_object *obj;
+ u32 *buf;
+
+ pr->pdc = NULL;
+
+ /* allocate and initialize pdc. It will be used later. */
+ obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL);
+ if (!obj_list) {
+ printk(KERN_ERR "Memory allocation error\n");
+ return;
+ }
+
+ obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL);
+ if (!obj) {
+ printk(KERN_ERR "Memory allocation error\n");
+ kfree(obj_list);
+ return;
+ }
+
+ buf = kmalloc(12, GFP_KERNEL);
+ if (!buf) {
+ printk(KERN_ERR "Memory allocation error\n");
+ kfree(obj);
+ kfree(obj_list);
+ return;
+ }
+
+ obj->type = ACPI_TYPE_BUFFER;
+ obj->buffer.length = 12;
+ obj->buffer.pointer = (u8 *) buf;
+ obj_list->count = 1;
+ obj_list->pointer = obj;
+ pr->pdc = obj_list;
+
+ /* Now let the arch do the bit-twiddling to buf[] */
+ arch_acpi_processor_init_pdc(pr);
+
+ return;
+}
+
/*
* _PDC is required for a BIOS-OS handshake for most of the newer
* ACPI processor features.
@@ -72,7 +115,7 @@ void acpi_processor_set_pdc(struct acpi_processor *pr)
if (arch_has_acpi_pdc() == false)
return;
- arch_acpi_processor_init_pdc(pr);
+ acpi_processor_init_pdc(pr);
acpi_processor_eval_pdc(pr);
arch_acpi_processor_cleanup_pdc(pr);
}