+/*
+ * Copyright (C) 2005 Intel Corporation
+ * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
+ *
+ * Alex Chiang <achiang@hp.com>
+ * - Unified x86/ia64 implementations
+ * Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
+ * - Added _PDC for platforms with Intel CPUs
+ */
#include <linux/dmi.h>
#include <acpi/acpi_drivers.h>
arch_acpi_set_pdc_bits(buf);
}
-static void acpi_processor_init_pdc(struct acpi_processor *pr)
+static struct acpi_object_list *acpi_processor_alloc_pdc(void)
{
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;
+ return NULL;
}
obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL);
if (!obj) {
printk(KERN_ERR "Memory allocation error\n");
kfree(obj_list);
- return;
+ return NULL;
}
buf = kmalloc(12, GFP_KERNEL);
printk(KERN_ERR "Memory allocation error\n");
kfree(obj);
kfree(obj_list);
- return;
+ return NULL;
}
acpi_set_pdc_bits(buf);
obj->buffer.pointer = (u8 *) buf;
obj_list->count = 1;
obj_list->pointer = obj;
- pr->pdc = obj_list;
- return;
+ return obj_list;
}
/*
* _PDC is required for a BIOS-OS handshake for most of the newer
* ACPI processor features.
*/
-static int acpi_processor_eval_pdc(struct acpi_processor *pr)
+static int
+acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
{
- struct acpi_object_list *pdc_in = pr->pdc;
acpi_status status = AE_OK;
- if (!pdc_in)
- return status;
if (idle_nomwait) {
/*
* If mwait is disabled for CPU C-states, the C2C3_FFH access
buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH);
}
- status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL);
+ status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL);
if (ACPI_FAILURE(status))
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
return status;
}
-void acpi_processor_set_pdc(struct acpi_processor *pr)
+void acpi_processor_set_pdc(acpi_handle handle)
{
+ struct acpi_object_list *obj_list;
+
if (arch_has_acpi_pdc() == false)
return;
- acpi_processor_init_pdc(pr);
- acpi_processor_eval_pdc(pr);
- arch_acpi_processor_cleanup_pdc(pr);
+ obj_list = acpi_processor_alloc_pdc();
+ if (!obj_list)
+ return;
+
+ acpi_processor_eval_pdc(handle, obj_list);
+
+ kfree(obj_list->pointer->buffer.pointer);
+ kfree(obj_list->pointer);
+ kfree(obj_list);
}
EXPORT_SYMBOL_GPL(acpi_processor_set_pdc);
static acpi_status
early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv)
{
- struct acpi_processor pr;
-
- pr.handle = handle;
-
- /* x86 implementation looks at pr.id to determine some
- * CPU capabilites. We can just hard code to 0 since we're
- * assuming the CPUs in the system are homogenous and all
- * have the same capabilities.
- */
- pr.id = 0;
-
- acpi_processor_set_pdc(&pr);
-
+ acpi_processor_set_pdc(handle);
return AE_OK;
}