static void __ref acpi_processor_hotplug_notify(acpi_handle handle,
u32 event, void *data)
{
struct acpi_processor *pr;
struct acpi_device *device = NULL;
int result;
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Processor driver received %s event\n",
(event == ACPI_NOTIFY_BUS_CHECK) ?
"ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"));
if (!is_processor_present(handle))
break;
if (acpi_bus_get_device(handle, &device)) {
result = acpi_processor_device_add(handle, &device);
if (result)
printk(KERN_ERR PREFIX
"Unable to add the device\n");
break;
}
pr = acpi_driver_data(device);
if (processor_cntl_external() && pr)
processor_notify_external(pr,
PROCESSOR_HOTPLUG, HOTPLUG_TYPE_ADD);
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"received ACPI_NOTIFY_EJECT_REQUEST\n"));
if (acpi_bus_get_device(handle, &device)) {
printk(KERN_ERR PREFIX
"Device don't exist, dropping EJECT\n");
break;
}
pr = acpi_driver_data(device);
if (!pr) {
printk(KERN_ERR PREFIX
"Driver data is NULL, dropping EJECT\n");
return;
}
if (processor_cntl_external())
processor_notify_external(pr, PROCESSOR_HOTPLUG,
HOTPLUG_TYPE_REMOVE);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
return;
}
int processor_notify_external(struct acpi_processor *pr, int event, int type)
{
int ret = -EINVAL;
if (!processor_cntl_external())
return -EINVAL;
switch (event) {
case PROCESSOR_PM_INIT:
case PROCESSOR_PM_CHANGE:
if ((type >= PM_TYPE_MAX) ||
!processor_extcntl_ops->pm_ops[type])
break;
ret = processor_extcntl_ops->pm_ops[type](pr, event);
break;
case PROCESSOR_HOTPLUG:
if (processor_extcntl_ops->hotplug)
ret = processor_extcntl_ops->hotplug(pr, type);
break;
default:
printk(KERN_ERR "Unsupport processor events %d.\n", event);
break;
}
return ret;
}
static
int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device)
{
acpi_handle phandle;
struct acpi_device *pdev;
if (acpi_get_parent(handle, &phandle)) {
return -ENODEV;
}
if (acpi_bus_get_device(phandle, &pdev)) {
return -ENODEV;
}
if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) {
return -ENODEV;
}
if (processor_cntl_external() && acpi_driver_data(*device))
processor_notify_external(acpi_driver_data(*device),
PROCESSOR_HOTPLUG, HOTPLUG_TYPE_ADD);
return 0;
}
static
int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device)
{
acpi_handle phandle;
struct acpi_device *pdev;
struct acpi_processor *pr;
if (acpi_get_parent(handle, &phandle)) {
return -ENODEV;
}
if (acpi_bus_get_device(phandle, &pdev)) {
return -ENODEV;
}
if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) {
return -ENODEV;
}
acpi_bus_start(*device);
pr = acpi_driver_data(*device);
if (!pr)
return -ENODEV;
if (processor_cntl_external())
processor_notify_external(pr,
PROCESSOR_HOTPLUG, HOTPLUG_TYPE_ADD);
if ((pr->id >= 0) && (pr->id < NR_CPUS)) {
kobject_uevent(&(*device)->kobj, KOBJ_ONLINE);
}
return 0;
}
static int __cpuinit acpi_processor_add(struct acpi_device *device)
{
struct acpi_processor *pr = NULL;
int result = 0;
struct sys_device *sysdev;
pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL);
if (!pr)
return -ENOMEM;
if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) {
kfree(pr);
return -ENOMEM;
}
pr->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS);
device->driver_data = pr;
processor_extcntl_init();
result = acpi_processor_get_info(device);
if (result ||
((pr->id == -1) && !processor_cntl_external())) {
/* Processor is physically not present */
return 0;
}
BUG_ON(!processor_cntl_external() &&
((pr->id >= nr_cpu_ids) || (pr->id < 0)));
/*
* Buggy BIOS check
* ACPI id of processors can be reported wrongly by the BIOS.
* Don't trust it blindly
*/
#ifndef CONFIG_XEN
if (per_cpu(processor_device_array, pr->id) != NULL &&
per_cpu(processor_device_array, pr->id) != device) {
#else
BUG_ON(pr->acpi_id >= NR_ACPI_CPUS);
if (processor_device_array[pr->acpi_id] != NULL &&
processor_device_array[pr->acpi_id] != device) {
#endif
printk(KERN_WARNING "BIOS reported wrong ACPI id "
"for the processor\n");
result = -ENODEV;
goto err_free_cpumask;
}
#ifndef CONFIG_XEN
per_cpu(processor_device_array, pr->id) = device;
per_cpu(processors, pr->id) = pr;
#else
processor_device_array[pr->acpi_id] = device;
if (pr->id != -1)
per_cpu(processors, pr->id) = pr;
#endif
result = acpi_processor_add_fs(device);
if (result)
goto err_free_cpumask;
if (pr->id != -1) {
sysdev = get_cpu_sysdev(pr->id);
if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) {
result = -EFAULT;
goto err_remove_fs;
}
}
/* _PDC call should be done before doing anything else (if reqd.). */
arch_acpi_processor_init_pdc(pr);
acpi_processor_set_pdc(pr);
arch_acpi_processor_cleanup_pdc(pr);
#if defined(CONFIG_CPU_FREQ) || defined(CONFIG_PROCESSOR_EXTERNAL_CONTROL)
acpi_processor_ppc_has_changed(pr);
#endif
/*
* pr->id may equal to -1 while processor_cntl_external enabled.
* throttle and thermal module don't support this case.
* Tx only works when dom0 vcpu == pcpu num by far, as we give
* control to dom0.
*/
if (pr->id != -1) {
acpi_processor_get_throttling_info(pr);
acpi_processor_get_limit_info(pr);
}
acpi_processor_power_init(pr, device);
result = processor_extcntl_prepare(pr);
if (result)
goto err_power_exit;
pr->cdev = thermal_cooling_device_register("Processor", device,
&processor_cooling_ops);
if (IS_ERR(pr->cdev)) {
result = PTR_ERR(pr->cdev);
goto err_power_exit;
}
dev_info(&device->dev, "registered as cooling_device%d\n",
pr->cdev->id);
result = sysfs_create_link(&device->dev.kobj,
&pr->cdev->device.kobj,
"thermal_cooling");
if (result) {
printk(KERN_ERR PREFIX "Create sysfs link\n");
goto err_thermal_unregister;
}
result = sysfs_create_link(&pr->cdev->device.kobj,
&device->dev.kobj,
"device");
if (result) {
printk(KERN_ERR PREFIX "Create sysfs link\n");
goto err_remove_sysfs;
}
return 0;
err_remove_sysfs:
sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
err_thermal_unregister:
thermal_cooling_device_unregister(pr->cdev);
err_power_exit:
acpi_processor_power_exit(pr, device);
err_remove_fs:
acpi_processor_remove_fs(device);
err_free_cpumask:
free_cpumask_var(pr->throttling.shared_cpu_map);
return result;
}
static int acpi_processor_remove(struct acpi_device *device, int type)
{
struct acpi_processor *pr = NULL;
if (!device || !acpi_driver_data(device))
return -EINVAL;
pr = acpi_driver_data(device);
if (!processor_cntl_external() && pr->id >= nr_cpu_ids)
goto free;
if (type == ACPI_BUS_REMOVAL_EJECT) {
if (acpi_processor_handle_eject(pr))
return -EINVAL;
}
acpi_processor_power_exit(pr, device);
if (pr->id != -1)
sysfs_remove_link(&device->dev.kobj, "sysdev");
acpi_processor_remove_fs(device);
if (pr->cdev) {
sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
sysfs_remove_link(&pr->cdev->device.kobj, "device");
thermal_cooling_device_unregister(pr->cdev);
pr->cdev = NULL;
}
#ifndef CONFIG_XEN
per_cpu(processors, pr->id) = NULL;
per_cpu(processor_device_array, pr->id) = NULL;
#else
if (pr->id != -1)
per_cpu(processors, pr->id) = NULL;
processor_device_array[pr->acpi_id] = NULL;
#endif
free:
free_cpumask_var(pr->throttling.shared_cpu_map);
kfree(pr);
return 0;
}
#ifdef CONFIG_ACPI_HOTPLUG_CPU
/****************************************************************************
* Acpi processor hotplug support *
****************************************************************************/
static int is_processor_present(acpi_handle handle)
{
acpi_status status;
unsigned long long sta = 0;
status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT))
return 1;
/*
* _STA is mandatory for a processor that supports hot plug
*/
if (status == AE_NOT_FOUND)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Processor does not support hot plug\n"));
else
ACPI_EXCEPTION((AE_INFO, status,
"Processor Device is not present"));
return 0;
}
static int acpi_processor_get_info(struct acpi_device *device)
{
acpi_status status = 0;
union acpi_object object = { 0 };
struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
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)) &&
!processor_cntl_external()) {
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.
*/
if (pr->id != -1)
sprintf(acpi_device_bid(device), "CPU%X", pr->id);
else
snprintf(acpi_device_bid(device),
ARRAY_SIZE(acpi_device_bid(device)),
"#%0*X",
(int)ARRAY_SIZE(acpi_device_bid(device)) - 2,
pr->acpi_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) && pr->id != -1)
arch_fix_phys_package_id(pr->id, object.integer.value);
return 0;
}
static void
acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data)
{
struct acpi_processor *pr;
struct acpi_device *device = NULL;
int result;
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
printk("Processor driver received %s event\n",
(event == ACPI_NOTIFY_BUS_CHECK) ?
"ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK");
if (!is_processor_present(handle))
break;
if (acpi_bus_get_device(handle, &device)) {
result = acpi_processor_device_add(handle, &device);
if (result)
printk(KERN_ERR PREFIX
"Unable to add the device\n");
break;
}
pr = acpi_driver_data(device);
if (!pr) {
printk(KERN_ERR PREFIX "Driver data is NULL\n");
break;
}
if (processor_cntl_external())
processor_notify_external(pr,
PROCESSOR_HOTPLUG, HOTPLUG_TYPE_ADD);
if (pr->id >= 0 && (pr->id < NR_CPUS)) {
kobject_uevent(&device->kobj, KOBJ_OFFLINE);
break;
}
result = acpi_processor_start(device);
if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) {
kobject_uevent(&device->kobj, KOBJ_ONLINE);
} else {
printk(KERN_ERR PREFIX "Device [%s] failed to start\n",
acpi_device_bid(device));
}
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"received ACPI_NOTIFY_EJECT_REQUEST\n"));
if (acpi_bus_get_device(handle, &device)) {
printk(KERN_ERR PREFIX
"Device don't exist, dropping EJECT\n");
break;
}
pr = acpi_driver_data(device);
if (!pr) {
printk(KERN_ERR PREFIX
"Driver data is NULL, dropping EJECT\n");
return;
}
if ((pr->id < NR_CPUS) && (cpu_present(pr->id)))
kobject_uevent(&device->kobj, KOBJ_OFFLINE);
if (processor_cntl_external())
processor_notify_external(pr, PROCESSOR_HOTPLUG,
HOTPLUG_TYPE_REMOVE);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
return;
}
static int acpi_processor_start(struct acpi_device *device)
{
int result = 0;
acpi_status status = AE_OK;
struct acpi_processor *pr;
processor_extcntl_init();
pr = acpi_driver_data(device);
result = acpi_processor_get_info(pr);
if (result ||
((pr->id == -1) && !processor_cntl_external())) {
/* Processor is physically not present */
return 0;
}
BUG_ON(!processor_cntl_external() &&
((pr->id >= NR_CPUS) || (pr->id < 0)));
/*
* Buggy BIOS check
* ACPI id of processors can be reported wrongly by the BIOS.
* Don't trust it blindly
*/
#ifdef CONFIG_XEN
BUG_ON(pr->acpi_id >= NR_ACPI_CPUS);
if (processor_device_array[pr->acpi_id] != NULL &&
processor_device_array[pr->acpi_id] != (void *)device) {
#else
if (processor_device_array[pr->id] != NULL &&
processor_device_array[pr->id] != (void *)device) {
#endif /* CONFIG_XEN */
printk(KERN_WARNING "BIOS reported wrong ACPI id"
"for the processor\n");
return -ENODEV;
}
#ifdef CONFIG_XEN
processor_device_array[pr->acpi_id] = (void *)device;
if (pr->id != -1)
processors[pr->id] = pr;
#else
processor_device_array[pr->id] = (void *)device;
processors[pr->id] = pr;
#endif /* CONFIG_XEN */
result = acpi_processor_add_fs(device);
if (result)
goto end;
status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY,
acpi_processor_notify, pr);
/* _PDC call should be done before doing anything else (if reqd.). */
arch_acpi_processor_init_pdc(pr);
acpi_processor_set_pdc(pr);
#if defined(CONFIG_CPU_FREQ) || defined(CONFIG_PROCESSOR_EXTERNAL_CONTROL)
acpi_processor_ppc_has_changed(pr);
#endif
/*
* pr->id may equal to -1 while processor_cntl_external enabled.
* throttle and thermal module don't support this case.
* Tx only works when dom0 vcpu == pcpu num by far, as we give
* control to dom0.
*/
if (pr->id != -1) {
acpi_processor_get_throttling_info(pr);
acpi_processor_get_limit_info(pr);
}
acpi_processor_power_init(pr, device);
result = processor_extcntl_prepare(pr);
if (result)
goto end;
if (pr->flags.throttling) {
printk(KERN_INFO PREFIX "%s [%s] (supports",
acpi_device_name(device), acpi_device_bid(device));
printk(" %d throttling states", pr->throttling.state_count);
printk(")\n");
}
end:
return result;
}
static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
{
struct acpi_processor *pr = (struct acpi_processor *)data;
struct acpi_device *device = NULL;
if (!pr)
return;
if (acpi_bus_get_device(pr->handle, &device))
return;
switch (event) {
case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
acpi_processor_ppc_has_changed(pr);
acpi_bus_generate_event(device, event,
pr->performance_platform_limit);
break;
case ACPI_PROCESSOR_NOTIFY_POWER:
acpi_processor_cst_has_changed(pr);
acpi_bus_generate_event(device, event, 0);
break;
case ACPI_PROCESSOR_NOTIFY_THROTTLING:
acpi_processor_tstate_has_changed(pr);
acpi_bus_generate_event(device, event, 0);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Unsupported event [0x%x]\n", event));
break;
}
return;
}
static int acpi_processor_add(struct acpi_device *device)
{
struct acpi_processor *pr = NULL;
if (!device)
return -EINVAL;
pr = kmalloc(sizeof(struct acpi_processor), GFP_KERNEL);
if (!pr)
return -ENOMEM;
memset(pr, 0, sizeof(struct acpi_processor));
pr->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS);
acpi_driver_data(device) = pr;
return 0;
}
static int acpi_processor_remove(struct acpi_device *device, int type)
{
acpi_status status = AE_OK;
struct acpi_processor *pr = NULL;
if (!device || !acpi_driver_data(device))
return -EINVAL;
pr = (struct acpi_processor *)acpi_driver_data(device);
if (!processor_cntl_external() && pr->id >= NR_CPUS) {
kfree(pr);
return 0;
}
if (type == ACPI_BUS_REMOVAL_EJECT) {
if (acpi_processor_handle_eject(pr))
return -EINVAL;
}
acpi_processor_power_exit(pr, device);
status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY,
acpi_processor_notify);
acpi_processor_remove_fs(device);
#ifdef CONFIG_XEN
if (pr->id != -1)
processors[pr->id] = NULL;
#else
processors[pr->id] = NULL;
#endif /* CONFIG_XEN */
kfree(pr);
return 0;
}
static int acpi_processor_get_info(struct acpi_processor *pr)
{
acpi_status status = 0;
union acpi_object object = { 0 };
struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
int cpu_index;
static int cpu0_initialized;
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_fadt.V1_pm2_cnt_blk && acpi_fadt.pm2_cnt_len) {
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"));
/*
* Evalute the processor object. Note that it is common on SMP to
* have the first (boot) processor with a valid PBLK address while
* all others have a NULL address.
*/
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;
cpu_index = convert_acpiid_to_cpu(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 (cpu_index == -1) {
if (ACPI_FAILURE
(acpi_processor_hotadd_init(pr->handle, &pr->id)) &&
!processor_cntl_external()) {
printk(KERN_ERR PREFIX
"Getting cpuindex for acpiid 0x%x\n",
pr->acpi_id);
return -ENODEV;
}
}
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_fadt.duty_offset;
pr->throttling.duty_width = acpi_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");
}
return 0;
}