- struct acpi_processor *pr;
- int cpu_index, device_declaration = 0;
- static int cpu0_initialized;
-
- pr = acpi_driver_data(device);
- if (!pr)
- return -EINVAL;
-
- if (num_online_cpus() > 1)
- errata.smp = TRUE;
-
- acpi_processor_errata(pr);
-
- /*
- * Check to see if we have bus mastering arbitration control. This
- * is required for proper C3 usage (to maintain cache coherency).
- */
- if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) {
- pr->flags.bm_control = 1;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Bus mastering arbitration control present\n"));
- } else
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "No bus mastering arbitration control\n"));
-
- if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) {
- /* Declared with "Processor" statement; match ProcessorID */
- status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer);
- if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX "Evaluating processor object\n");
- return -ENODEV;
- }
-
- /*
- * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP.
- * >>> 'acpi_get_processor_id(acpi_id, &id)' in
- * arch/xxx/acpi.c
- */
- pr->acpi_id = object.processor.proc_id;
- } else {
- /*
- * Declared with "Device" statement; match _UID.
- * Note that we don't handle string _UIDs yet.
- */
- unsigned long long value;
- status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID,
- NULL, &value);
- if (ACPI_FAILURE(status)) {
- printk(KERN_ERR PREFIX
- "Evaluating processor _UID [%#x]\n", status);
- return -ENODEV;
- }
- device_declaration = 1;
- pr->acpi_id = value;
- }
- cpu_index = get_cpu_id(pr->handle, device_declaration, pr->acpi_id);
-
- /* Handle UP system running SMP kernel, with no LAPIC in MADT */
- if (!cpu0_initialized && (cpu_index == -1) &&
- (num_online_cpus() == 1)) {
- cpu_index = 0;
- }
-
- cpu0_initialized = 1;
-
- pr->id = cpu_index;
-
- /*
- * Extra Processor objects may be enumerated on MP systems with
- * less than the max # of CPUs. They should be ignored _iff
- * they are physically not present.
- */
- if (pr->id == -1) {
- if (ACPI_FAILURE
- (acpi_processor_hotadd_init(pr->handle, &pr->id))) {
- return -ENODEV;
- }
- }
- /*
- * On some boxes several processors use the same processor bus id.
- * But they are located in different scope. For example:
- * \_SB.SCK0.CPU0
- * \_SB.SCK1.CPU0
- * Rename the processor device bus id. And the new bus id will be
- * generated as the following format:
- * CPU+CPU ID.
- */
- sprintf(acpi_device_bid(device), "CPU%X", pr->id);
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id,
- pr->acpi_id));
-
- if (!object.processor.pblk_address)
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n"));
- else if (object.processor.pblk_length != 6)
- printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n",
- object.processor.pblk_length);
- else {
- pr->throttling.address = object.processor.pblk_address;
- pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset;
- pr->throttling.duty_width = acpi_gbl_FADT.duty_width;
-
- pr->pblk = object.processor.pblk_address;
-
- /*
- * We don't care about error returns - we just try to mark
- * these reserved so that nobody else is confused into thinking
- * that this region might be unused..
- *
- * (In particular, allocating the IO range for Cardbus)
- */
- request_region(pr->throttling.address, 6, "ACPI CPU throttle");
- }
-
- /*
- * If ACPI describes a slot number for this CPU, we can use it
- * ensure we get the right value in the "physical id" field
- * of /proc/cpuinfo
- */
- status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer);
- if (ACPI_SUCCESS(status))
- arch_fix_phys_package_id(pr->id, object.integer.value);
-
- return 0;
-}