obj-$(CONFIG_ACPI_POWER_METER) += power_meter.o
# processor has its own "processor." module_param namespace
-processor-y := processor_core.o processor_throttling.o
+processor-y := processor_driver.o processor_throttling.o
processor-y += processor_idle.o processor_thermal.o
processor-$(CONFIG_CPU_FREQ) += processor_perflib.o
+++ /dev/null
-/*
- * acpi_processor.c - ACPI Processor Driver ($Revision: 71 $)
- *
- * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
- * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
- * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de>
- * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
- * - Added processor hotplug support
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- * TBD:
- * 1. Make # power states dynamic.
- * 2. Support duty_cycle values that span bit 4.
- * 3. Optimize by having scheduler determine business instead of
- * having us try to calculate it here.
- * 4. Need C1 timing -- must modify kernel (IRQ handler) to get this.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/pm.h>
-#include <linux/cpufreq.h>
-#include <linux/cpu.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/dmi.h>
-#include <linux/moduleparam.h>
-#include <linux/cpuidle.h>
-
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/cpu.h>
-#include <asm/delay.h>
-#include <asm/uaccess.h>
-#include <asm/processor.h>
-#include <asm/smp.h>
-#include <asm/acpi.h>
-
-#include <acpi/acpi_bus.h>
-#include <acpi/acpi_drivers.h>
-#include <acpi/processor.h>
-
-#define PREFIX "ACPI: "
-
-#define ACPI_PROCESSOR_CLASS "processor"
-#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
-#define ACPI_PROCESSOR_FILE_INFO "info"
-#define ACPI_PROCESSOR_FILE_THROTTLING "throttling"
-#define ACPI_PROCESSOR_FILE_LIMIT "limit"
-#define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80
-#define ACPI_PROCESSOR_NOTIFY_POWER 0x81
-#define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82
-
-#define ACPI_PROCESSOR_LIMIT_USER 0
-#define ACPI_PROCESSOR_LIMIT_THERMAL 1
-
-#define _COMPONENT ACPI_PROCESSOR_COMPONENT
-ACPI_MODULE_NAME("processor_core");
-
-MODULE_AUTHOR("Paul Diefenbaugh");
-MODULE_DESCRIPTION("ACPI Processor Driver");
-MODULE_LICENSE("GPL");
-
-static int acpi_processor_add(struct acpi_device *device);
-static int acpi_processor_remove(struct acpi_device *device, int type);
-#ifdef CONFIG_ACPI_PROCFS
-static int acpi_processor_info_open_fs(struct inode *inode, struct file *file);
-#endif
-static void acpi_processor_notify(struct acpi_device *device, u32 event);
-static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu);
-static int acpi_processor_handle_eject(struct acpi_processor *pr);
-
-
-static const struct acpi_device_id processor_device_ids[] = {
- {ACPI_PROCESSOR_OBJECT_HID, 0},
- {"ACPI0007", 0},
- {"", 0},
-};
-MODULE_DEVICE_TABLE(acpi, processor_device_ids);
-
-static struct acpi_driver acpi_processor_driver = {
- .name = "processor",
- .class = ACPI_PROCESSOR_CLASS,
- .ids = processor_device_ids,
- .ops = {
- .add = acpi_processor_add,
- .remove = acpi_processor_remove,
- .suspend = acpi_processor_suspend,
- .resume = acpi_processor_resume,
- .notify = acpi_processor_notify,
- },
-};
-
-#define INSTALL_NOTIFY_HANDLER 1
-#define UNINSTALL_NOTIFY_HANDLER 2
-#ifdef CONFIG_ACPI_PROCFS
-static const struct file_operations acpi_processor_info_fops = {
- .owner = THIS_MODULE,
- .open = acpi_processor_info_open_fs,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-#endif
-
-DEFINE_PER_CPU(struct acpi_processor *, processors);
-EXPORT_PER_CPU_SYMBOL(processors);
-
-struct acpi_processor_errata errata __read_mostly;
-
-/* --------------------------------------------------------------------------
- Errata Handling
- -------------------------------------------------------------------------- */
-
-static int acpi_processor_errata_piix4(struct pci_dev *dev)
-{
- u8 value1 = 0;
- u8 value2 = 0;
-
-
- if (!dev)
- return -EINVAL;
-
- /*
- * Note that 'dev' references the PIIX4 ACPI Controller.
- */
-
- switch (dev->revision) {
- case 0:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n"));
- break;
- case 1:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n"));
- break;
- case 2:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n"));
- break;
- case 3:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n"));
- break;
- default:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n"));
- break;
- }
-
- switch (dev->revision) {
-
- case 0: /* PIIX4 A-step */
- case 1: /* PIIX4 B-step */
- /*
- * See specification changes #13 ("Manual Throttle Duty Cycle")
- * and #14 ("Enabling and Disabling Manual Throttle"), plus
- * erratum #5 ("STPCLK# Deassertion Time") from the January
- * 2002 PIIX4 specification update. Applies to only older
- * PIIX4 models.
- */
- errata.piix4.throttle = 1;
-
- case 2: /* PIIX4E */
- case 3: /* PIIX4M */
- /*
- * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA
- * Livelock") from the January 2002 PIIX4 specification update.
- * Applies to all PIIX4 models.
- */
-
- /*
- * BM-IDE
- * ------
- * Find the PIIX4 IDE Controller and get the Bus Master IDE
- * Status register address. We'll use this later to read
- * each IDE controller's DMA status to make sure we catch all
- * DMA activity.
- */
- dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
- PCI_DEVICE_ID_INTEL_82371AB,
- PCI_ANY_ID, PCI_ANY_ID, NULL);
- if (dev) {
- errata.piix4.bmisx = pci_resource_start(dev, 4);
- pci_dev_put(dev);
- }
-
- /*
- * Type-F DMA
- * ----------
- * Find the PIIX4 ISA Controller and read the Motherboard
- * DMA controller's status to see if Type-F (Fast) DMA mode
- * is enabled (bit 7) on either channel. Note that we'll
- * disable C3 support if this is enabled, as some legacy
- * devices won't operate well if fast DMA is disabled.
- */
- dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
- PCI_DEVICE_ID_INTEL_82371AB_0,
- PCI_ANY_ID, PCI_ANY_ID, NULL);
- if (dev) {
- pci_read_config_byte(dev, 0x76, &value1);
- pci_read_config_byte(dev, 0x77, &value2);
- if ((value1 & 0x80) || (value2 & 0x80))
- errata.piix4.fdma = 1;
- pci_dev_put(dev);
- }
-
- break;
- }
-
- if (errata.piix4.bmisx)
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Bus master activity detection (BM-IDE) erratum enabled\n"));
- if (errata.piix4.fdma)
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Type-F DMA livelock erratum (C3 disabled)\n"));
-
- return 0;
-}
-
-static int acpi_processor_errata(struct acpi_processor *pr)
-{
- int result = 0;
- struct pci_dev *dev = NULL;
-
-
- if (!pr)
- return -EINVAL;
-
- /*
- * PIIX4
- */
- dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
- PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID,
- PCI_ANY_ID, NULL);
- if (dev) {
- result = acpi_processor_errata_piix4(dev);
- pci_dev_put(dev);
- }
-
- return result;
-}
-
-/* --------------------------------------------------------------------------
- FS Interface (/proc)
- -------------------------------------------------------------------------- */
-
-#ifdef CONFIG_ACPI_PROCFS
-static struct proc_dir_entry *acpi_processor_dir = NULL;
-
-static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset)
-{
- struct acpi_processor *pr = seq->private;
-
-
- if (!pr)
- goto end;
-
- seq_printf(seq, "processor id: %d\n"
- "acpi id: %d\n"
- "bus mastering control: %s\n"
- "power management: %s\n"
- "throttling control: %s\n"
- "limit interface: %s\n",
- pr->id,
- pr->acpi_id,
- pr->flags.bm_control ? "yes" : "no",
- pr->flags.power ? "yes" : "no",
- pr->flags.throttling ? "yes" : "no",
- pr->flags.limit ? "yes" : "no");
-
- end:
- return 0;
-}
-
-static int acpi_processor_info_open_fs(struct inode *inode, struct file *file)
-{
- return single_open(file, acpi_processor_info_seq_show,
- PDE(inode)->data);
-}
-
-static int __cpuinit acpi_processor_add_fs(struct acpi_device *device)
-{
- struct proc_dir_entry *entry = NULL;
-
-
- if (!acpi_device_dir(device)) {
- acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
- acpi_processor_dir);
- if (!acpi_device_dir(device))
- return -ENODEV;
- }
-
- /* 'info' [R] */
- entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO,
- S_IRUGO, acpi_device_dir(device),
- &acpi_processor_info_fops,
- acpi_driver_data(device));
- if (!entry)
- return -EIO;
-
- /* 'throttling' [R/W] */
- entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING,
- S_IFREG | S_IRUGO | S_IWUSR,
- acpi_device_dir(device),
- &acpi_processor_throttling_fops,
- acpi_driver_data(device));
- if (!entry)
- return -EIO;
-
- /* 'limit' [R/W] */
- entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT,
- S_IFREG | S_IRUGO | S_IWUSR,
- acpi_device_dir(device),
- &acpi_processor_limit_fops,
- acpi_driver_data(device));
- if (!entry)
- return -EIO;
- return 0;
-}
-static int acpi_processor_remove_fs(struct acpi_device *device)
-{
-
- if (acpi_device_dir(device)) {
- remove_proc_entry(ACPI_PROCESSOR_FILE_INFO,
- acpi_device_dir(device));
- remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING,
- acpi_device_dir(device));
- remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT,
- acpi_device_dir(device));
- remove_proc_entry(acpi_device_bid(device), acpi_processor_dir);
- acpi_device_dir(device) = NULL;
- }
-
- return 0;
-}
-#else
-static inline int acpi_processor_add_fs(struct acpi_device *device)
-{
- return 0;
-}
-static inline int acpi_processor_remove_fs(struct acpi_device *device)
-{
- return 0;
-}
-#endif
-
-/* Use the acpiid in MADT to map cpus in case of SMP */
-
-#ifndef CONFIG_SMP
-static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { return -1; }
-#else
-
-static struct acpi_table_madt *madt;
-
-static int map_lapic_id(struct acpi_subtable_header *entry,
- u32 acpi_id, int *apic_id)
-{
- struct acpi_madt_local_apic *lapic =
- (struct acpi_madt_local_apic *)entry;
- if ((lapic->lapic_flags & ACPI_MADT_ENABLED) &&
- lapic->processor_id == acpi_id) {
- *apic_id = lapic->id;
- return 1;
- }
- return 0;
-}
-
-static int map_x2apic_id(struct acpi_subtable_header *entry,
- int device_declaration, u32 acpi_id, int *apic_id)
-{
- struct acpi_madt_local_x2apic *apic =
- (struct acpi_madt_local_x2apic *)entry;
- u32 tmp = apic->local_apic_id;
-
- /* Only check enabled APICs*/
- if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
- return 0;
-
- /* Device statement declaration type */
- if (device_declaration) {
- if (apic->uid == acpi_id)
- goto found;
- }
-
- return 0;
-found:
- *apic_id = tmp;
- return 1;
-}
-
-static int map_lsapic_id(struct acpi_subtable_header *entry,
- int device_declaration, u32 acpi_id, int *apic_id)
-{
- struct acpi_madt_local_sapic *lsapic =
- (struct acpi_madt_local_sapic *)entry;
- u32 tmp = (lsapic->id << 8) | lsapic->eid;
-
- /* Only check enabled APICs*/
- if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
- return 0;
-
- /* Device statement declaration type */
- if (device_declaration) {
- if (entry->length < 16)
- printk(KERN_ERR PREFIX
- "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n",
- tmp);
- else if (lsapic->uid == acpi_id)
- goto found;
- /* Processor statement declaration type */
- } else if (lsapic->processor_id == acpi_id)
- goto found;
-
- return 0;
-found:
- *apic_id = tmp;
- return 1;
-}
-
-static int map_madt_entry(int type, u32 acpi_id)
-{
- unsigned long madt_end, entry;
- int apic_id = -1;
-
- if (!madt)
- return apic_id;
-
- entry = (unsigned long)madt;
- madt_end = entry + madt->header.length;
-
- /* Parse all entries looking for a match. */
-
- entry += sizeof(struct acpi_table_madt);
- while (entry + sizeof(struct acpi_subtable_header) < madt_end) {
- struct acpi_subtable_header *header =
- (struct acpi_subtable_header *)entry;
- if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
- if (map_lapic_id(header, acpi_id, &apic_id))
- break;
- } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {
- if (map_x2apic_id(header, type, acpi_id, &apic_id))
- break;
- } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
- if (map_lsapic_id(header, type, acpi_id, &apic_id))
- break;
- }
- entry += header->length;
- }
- return apic_id;
-}
-
-static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
-{
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- union acpi_object *obj;
- struct acpi_subtable_header *header;
- int apic_id = -1;
-
- if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
- goto exit;
-
- if (!buffer.length || !buffer.pointer)
- goto exit;
-
- obj = buffer.pointer;
- if (obj->type != ACPI_TYPE_BUFFER ||
- obj->buffer.length < sizeof(struct acpi_subtable_header)) {
- goto exit;
- }
-
- header = (struct acpi_subtable_header *)obj->buffer.pointer;
- if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
- map_lapic_id(header, acpi_id, &apic_id);
- } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
- map_lsapic_id(header, type, acpi_id, &apic_id);
- }
-
-exit:
- if (buffer.pointer)
- kfree(buffer.pointer);
- return apic_id;
-}
-
-static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id)
-{
- int i;
- int apic_id = -1;
-
- apic_id = map_mat_entry(handle, type, acpi_id);
- if (apic_id == -1)
- apic_id = map_madt_entry(type, acpi_id);
- if (apic_id == -1)
- return apic_id;
-
- for_each_possible_cpu(i) {
- if (cpu_physical_id(i) == apic_id)
- return i;
- }
- return -1;
-}
-#endif
-
-/* --------------------------------------------------------------------------
- Driver Interface
- -------------------------------------------------------------------------- */
-
-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))) {
- 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;
-}
-
-static DEFINE_PER_CPU(void *, processor_device_array);
-
-static void acpi_processor_notify(struct acpi_device *device, u32 event)
-{
- struct acpi_processor *pr = acpi_driver_data(device);
- int saved;
-
- if (!pr)
- return;
-
- switch (event) {
- case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
- saved = pr->performance_platform_limit;
- acpi_processor_ppc_has_changed(pr, 1);
- if (saved == pr->performance_platform_limit)
- break;
- acpi_bus_generate_proc_event(device, event,
- pr->performance_platform_limit);
- acpi_bus_generate_netlink_event(device->pnp.device_class,
- dev_name(&device->dev), event,
- pr->performance_platform_limit);
- break;
- case ACPI_PROCESSOR_NOTIFY_POWER:
- acpi_processor_cst_has_changed(pr);
- acpi_bus_generate_proc_event(device, event, 0);
- acpi_bus_generate_netlink_event(device->pnp.device_class,
- dev_name(&device->dev), event, 0);
- break;
- case ACPI_PROCESSOR_NOTIFY_THROTTLING:
- acpi_processor_tstate_has_changed(pr);
- acpi_bus_generate_proc_event(device, event, 0);
- acpi_bus_generate_netlink_event(device->pnp.device_class,
- dev_name(&device->dev), event, 0);
- default:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Unsupported event [0x%x]\n", event));
- break;
- }
-
- return;
-}
-
-static int acpi_cpu_soft_notify(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
-{
- unsigned int cpu = (unsigned long)hcpu;
- struct acpi_processor *pr = per_cpu(processors, cpu);
-
- if (action == CPU_ONLINE && pr) {
- acpi_processor_ppc_has_changed(pr, 0);
- acpi_processor_cst_has_changed(pr);
- acpi_processor_tstate_has_changed(pr);
- }
- return NOTIFY_OK;
-}
-
-static struct notifier_block acpi_cpu_notifier =
-{
- .notifier_call = acpi_cpu_soft_notify,
-};
-
-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;
-
- result = acpi_processor_get_info(device);
- if (result) {
- /* Processor is physically not present */
- return 0;
- }
-
- BUG_ON((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
- */
- if (per_cpu(processor_device_array, pr->id) != NULL &&
- per_cpu(processor_device_array, pr->id) != device) {
- printk(KERN_WARNING "BIOS reported wrong ACPI id "
- "for the processor\n");
- result = -ENODEV;
- goto err_free_cpumask;
- }
- per_cpu(processor_device_array, pr->id) = device;
-
- per_cpu(processors, pr->id) = pr;
-
- result = acpi_processor_add_fs(device);
- if (result)
- goto err_free_cpumask;
-
- 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.). */
- acpi_processor_set_pdc(pr->handle);
-
-#ifdef CONFIG_CPU_FREQ
- acpi_processor_ppc_has_changed(pr, 0);
-#endif
- acpi_processor_get_throttling_info(pr);
- acpi_processor_get_limit_info(pr);
-
-
- acpi_processor_power_init(pr, device);
-
- 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_dbg(&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 (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);
-
- 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;
- }
-
- per_cpu(processors, pr->id) = NULL;
- per_cpu(processor_device_array, pr->id) = NULL;
-
-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_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;
- }
-
- return 0;
-}
-
-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;
- }
- 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;
- }
- break;
- default:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Unsupported event [0x%x]\n", event));
- break;
- }
-
- return;
-}
-
-static acpi_status
-processor_walk_namespace_cb(acpi_handle handle,
- u32 lvl, void *context, void **rv)
-{
- acpi_status status;
- int *action = context;
- acpi_object_type type = 0;
-
- status = acpi_get_type(handle, &type);
- if (ACPI_FAILURE(status))
- return (AE_OK);
-
- if (type != ACPI_TYPE_PROCESSOR)
- return (AE_OK);
-
- switch (*action) {
- case INSTALL_NOTIFY_HANDLER:
- acpi_install_notify_handler(handle,
- ACPI_SYSTEM_NOTIFY,
- acpi_processor_hotplug_notify,
- NULL);
- break;
- case UNINSTALL_NOTIFY_HANDLER:
- acpi_remove_notify_handler(handle,
- ACPI_SYSTEM_NOTIFY,
- acpi_processor_hotplug_notify);
- break;
- default:
- break;
- }
-
- return (AE_OK);
-}
-
-static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
-{
-
- if (!is_processor_present(handle)) {
- return AE_ERROR;
- }
-
- if (acpi_map_lsapic(handle, p_cpu))
- return AE_ERROR;
-
- if (arch_register_cpu(*p_cpu)) {
- acpi_unmap_lsapic(*p_cpu);
- return AE_ERROR;
- }
-
- return AE_OK;
-}
-
-static int acpi_processor_handle_eject(struct acpi_processor *pr)
-{
- if (cpu_online(pr->id))
- cpu_down(pr->id);
-
- arch_unregister_cpu(pr->id);
- acpi_unmap_lsapic(pr->id);
- return (0);
-}
-#else
-static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
-{
- return AE_ERROR;
-}
-static int acpi_processor_handle_eject(struct acpi_processor *pr)
-{
- return (-EINVAL);
-}
-#endif
-
-static
-void acpi_processor_install_hotplug_notify(void)
-{
-#ifdef CONFIG_ACPI_HOTPLUG_CPU
- int action = INSTALL_NOTIFY_HANDLER;
- acpi_walk_namespace(ACPI_TYPE_PROCESSOR,
- ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX,
- processor_walk_namespace_cb, NULL, &action, NULL);
-#endif
- register_hotcpu_notifier(&acpi_cpu_notifier);
-}
-
-static
-void acpi_processor_uninstall_hotplug_notify(void)
-{
-#ifdef CONFIG_ACPI_HOTPLUG_CPU
- int action = UNINSTALL_NOTIFY_HANDLER;
- acpi_walk_namespace(ACPI_TYPE_PROCESSOR,
- ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX,
- processor_walk_namespace_cb, NULL, &action, NULL);
-#endif
- unregister_hotcpu_notifier(&acpi_cpu_notifier);
-}
-
-/*
- * We keep the driver loaded even when ACPI is not running.
- * This is needed for the powernow-k8 driver, that works even without
- * ACPI, but needs symbols from this driver
- */
-
-static int __init acpi_processor_init(void)
-{
- int result = 0;
-
- if (acpi_disabled)
- return 0;
-
- memset(&errata, 0, sizeof(errata));
-
-#ifdef CONFIG_SMP
- if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
- (struct acpi_table_header **)&madt)))
- madt = NULL;
-#endif
-#ifdef CONFIG_ACPI_PROCFS
- acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir);
- if (!acpi_processor_dir)
- return -ENOMEM;
-#endif
- result = cpuidle_register_driver(&acpi_idle_driver);
- if (result < 0)
- goto out_proc;
-
- result = acpi_bus_register_driver(&acpi_processor_driver);
- if (result < 0)
- goto out_cpuidle;
-
- acpi_processor_install_hotplug_notify();
-
- acpi_thermal_cpufreq_init();
-
- acpi_processor_ppc_init();
-
- acpi_processor_throttling_init();
-
- return 0;
-
-out_cpuidle:
- cpuidle_unregister_driver(&acpi_idle_driver);
-
-out_proc:
-#ifdef CONFIG_ACPI_PROCFS
- remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
-#endif
-
- return result;
-}
-
-static void __exit acpi_processor_exit(void)
-{
- if (acpi_disabled)
- return;
-
- acpi_processor_ppc_exit();
-
- acpi_thermal_cpufreq_exit();
-
- acpi_processor_uninstall_hotplug_notify();
-
- acpi_bus_unregister_driver(&acpi_processor_driver);
-
- cpuidle_unregister_driver(&acpi_idle_driver);
-
-#ifdef CONFIG_ACPI_PROCFS
- remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
-#endif
-
- return;
-}
-
-module_init(acpi_processor_init);
-module_exit(acpi_processor_exit);
-
-EXPORT_SYMBOL(acpi_processor_set_thermal_limit);
-
-MODULE_ALIAS("processor");
--- /dev/null
+/*
+ * acpi_processor.c - ACPI Processor Driver ($Revision: 71 $)
+ *
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de>
+ * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
+ * - Added processor hotplug support
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * TBD:
+ * 1. Make # power states dynamic.
+ * 2. Support duty_cycle values that span bit 4.
+ * 3. Optimize by having scheduler determine business instead of
+ * having us try to calculate it here.
+ * 4. Need C1 timing -- must modify kernel (IRQ handler) to get this.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/pm.h>
+#include <linux/cpufreq.h>
+#include <linux/cpu.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/dmi.h>
+#include <linux/moduleparam.h>
+#include <linux/cpuidle.h>
+
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/cpu.h>
+#include <asm/delay.h>
+#include <asm/uaccess.h>
+#include <asm/processor.h>
+#include <asm/smp.h>
+#include <asm/acpi.h>
+
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/processor.h>
+
+#define PREFIX "ACPI: "
+
+#define ACPI_PROCESSOR_CLASS "processor"
+#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
+#define ACPI_PROCESSOR_FILE_INFO "info"
+#define ACPI_PROCESSOR_FILE_THROTTLING "throttling"
+#define ACPI_PROCESSOR_FILE_LIMIT "limit"
+#define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80
+#define ACPI_PROCESSOR_NOTIFY_POWER 0x81
+#define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82
+
+#define ACPI_PROCESSOR_LIMIT_USER 0
+#define ACPI_PROCESSOR_LIMIT_THERMAL 1
+
+#define _COMPONENT ACPI_PROCESSOR_COMPONENT
+ACPI_MODULE_NAME("processor_driver");
+
+MODULE_AUTHOR("Paul Diefenbaugh");
+MODULE_DESCRIPTION("ACPI Processor Driver");
+MODULE_LICENSE("GPL");
+
+static int acpi_processor_add(struct acpi_device *device);
+static int acpi_processor_remove(struct acpi_device *device, int type);
+#ifdef CONFIG_ACPI_PROCFS
+static int acpi_processor_info_open_fs(struct inode *inode, struct file *file);
+#endif
+static void acpi_processor_notify(struct acpi_device *device, u32 event);
+static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu);
+static int acpi_processor_handle_eject(struct acpi_processor *pr);
+
+
+static const struct acpi_device_id processor_device_ids[] = {
+ {ACPI_PROCESSOR_OBJECT_HID, 0},
+ {"ACPI0007", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, processor_device_ids);
+
+static struct acpi_driver acpi_processor_driver = {
+ .name = "processor",
+ .class = ACPI_PROCESSOR_CLASS,
+ .ids = processor_device_ids,
+ .ops = {
+ .add = acpi_processor_add,
+ .remove = acpi_processor_remove,
+ .suspend = acpi_processor_suspend,
+ .resume = acpi_processor_resume,
+ .notify = acpi_processor_notify,
+ },
+};
+
+#define INSTALL_NOTIFY_HANDLER 1
+#define UNINSTALL_NOTIFY_HANDLER 2
+#ifdef CONFIG_ACPI_PROCFS
+static const struct file_operations acpi_processor_info_fops = {
+ .owner = THIS_MODULE,
+ .open = acpi_processor_info_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+#endif
+
+DEFINE_PER_CPU(struct acpi_processor *, processors);
+EXPORT_PER_CPU_SYMBOL(processors);
+
+struct acpi_processor_errata errata __read_mostly;
+
+/* --------------------------------------------------------------------------
+ Errata Handling
+ -------------------------------------------------------------------------- */
+
+static int acpi_processor_errata_piix4(struct pci_dev *dev)
+{
+ u8 value1 = 0;
+ u8 value2 = 0;
+
+
+ if (!dev)
+ return -EINVAL;
+
+ /*
+ * Note that 'dev' references the PIIX4 ACPI Controller.
+ */
+
+ switch (dev->revision) {
+ case 0:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n"));
+ break;
+ case 1:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n"));
+ break;
+ case 2:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n"));
+ break;
+ case 3:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n"));
+ break;
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n"));
+ break;
+ }
+
+ switch (dev->revision) {
+
+ case 0: /* PIIX4 A-step */
+ case 1: /* PIIX4 B-step */
+ /*
+ * See specification changes #13 ("Manual Throttle Duty Cycle")
+ * and #14 ("Enabling and Disabling Manual Throttle"), plus
+ * erratum #5 ("STPCLK# Deassertion Time") from the January
+ * 2002 PIIX4 specification update. Applies to only older
+ * PIIX4 models.
+ */
+ errata.piix4.throttle = 1;
+
+ case 2: /* PIIX4E */
+ case 3: /* PIIX4M */
+ /*
+ * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA
+ * Livelock") from the January 2002 PIIX4 specification update.
+ * Applies to all PIIX4 models.
+ */
+
+ /*
+ * BM-IDE
+ * ------
+ * Find the PIIX4 IDE Controller and get the Bus Master IDE
+ * Status register address. We'll use this later to read
+ * each IDE controller's DMA status to make sure we catch all
+ * DMA activity.
+ */
+ dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_82371AB,
+ PCI_ANY_ID, PCI_ANY_ID, NULL);
+ if (dev) {
+ errata.piix4.bmisx = pci_resource_start(dev, 4);
+ pci_dev_put(dev);
+ }
+
+ /*
+ * Type-F DMA
+ * ----------
+ * Find the PIIX4 ISA Controller and read the Motherboard
+ * DMA controller's status to see if Type-F (Fast) DMA mode
+ * is enabled (bit 7) on either channel. Note that we'll
+ * disable C3 support if this is enabled, as some legacy
+ * devices won't operate well if fast DMA is disabled.
+ */
+ dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_82371AB_0,
+ PCI_ANY_ID, PCI_ANY_ID, NULL);
+ if (dev) {
+ pci_read_config_byte(dev, 0x76, &value1);
+ pci_read_config_byte(dev, 0x77, &value2);
+ if ((value1 & 0x80) || (value2 & 0x80))
+ errata.piix4.fdma = 1;
+ pci_dev_put(dev);
+ }
+
+ break;
+ }
+
+ if (errata.piix4.bmisx)
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Bus master activity detection (BM-IDE) erratum enabled\n"));
+ if (errata.piix4.fdma)
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Type-F DMA livelock erratum (C3 disabled)\n"));
+
+ return 0;
+}
+
+static int acpi_processor_errata(struct acpi_processor *pr)
+{
+ int result = 0;
+ struct pci_dev *dev = NULL;
+
+
+ if (!pr)
+ return -EINVAL;
+
+ /*
+ * PIIX4
+ */
+ dev = pci_get_subsys(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID,
+ PCI_ANY_ID, NULL);
+ if (dev) {
+ result = acpi_processor_errata_piix4(dev);
+ pci_dev_put(dev);
+ }
+
+ return result;
+}
+
+/* --------------------------------------------------------------------------
+ FS Interface (/proc)
+ -------------------------------------------------------------------------- */
+
+#ifdef CONFIG_ACPI_PROCFS
+static struct proc_dir_entry *acpi_processor_dir = NULL;
+
+static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_processor *pr = seq->private;
+
+
+ if (!pr)
+ goto end;
+
+ seq_printf(seq, "processor id: %d\n"
+ "acpi id: %d\n"
+ "bus mastering control: %s\n"
+ "power management: %s\n"
+ "throttling control: %s\n"
+ "limit interface: %s\n",
+ pr->id,
+ pr->acpi_id,
+ pr->flags.bm_control ? "yes" : "no",
+ pr->flags.power ? "yes" : "no",
+ pr->flags.throttling ? "yes" : "no",
+ pr->flags.limit ? "yes" : "no");
+
+ end:
+ return 0;
+}
+
+static int acpi_processor_info_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_processor_info_seq_show,
+ PDE(inode)->data);
+}
+
+static int __cpuinit acpi_processor_add_fs(struct acpi_device *device)
+{
+ struct proc_dir_entry *entry = NULL;
+
+
+ if (!acpi_device_dir(device)) {
+ acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
+ acpi_processor_dir);
+ if (!acpi_device_dir(device))
+ return -ENODEV;
+ }
+
+ /* 'info' [R] */
+ entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO,
+ S_IRUGO, acpi_device_dir(device),
+ &acpi_processor_info_fops,
+ acpi_driver_data(device));
+ if (!entry)
+ return -EIO;
+
+ /* 'throttling' [R/W] */
+ entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING,
+ S_IFREG | S_IRUGO | S_IWUSR,
+ acpi_device_dir(device),
+ &acpi_processor_throttling_fops,
+ acpi_driver_data(device));
+ if (!entry)
+ return -EIO;
+
+ /* 'limit' [R/W] */
+ entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT,
+ S_IFREG | S_IRUGO | S_IWUSR,
+ acpi_device_dir(device),
+ &acpi_processor_limit_fops,
+ acpi_driver_data(device));
+ if (!entry)
+ return -EIO;
+ return 0;
+}
+static int acpi_processor_remove_fs(struct acpi_device *device)
+{
+
+ if (acpi_device_dir(device)) {
+ remove_proc_entry(ACPI_PROCESSOR_FILE_INFO,
+ acpi_device_dir(device));
+ remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING,
+ acpi_device_dir(device));
+ remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT,
+ acpi_device_dir(device));
+ remove_proc_entry(acpi_device_bid(device), acpi_processor_dir);
+ acpi_device_dir(device) = NULL;
+ }
+
+ return 0;
+}
+#else
+static inline int acpi_processor_add_fs(struct acpi_device *device)
+{
+ return 0;
+}
+static inline int acpi_processor_remove_fs(struct acpi_device *device)
+{
+ return 0;
+}
+#endif
+
+/* Use the acpiid in MADT to map cpus in case of SMP */
+
+#ifndef CONFIG_SMP
+static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { return -1; }
+#else
+
+static struct acpi_table_madt *madt;
+
+static int map_lapic_id(struct acpi_subtable_header *entry,
+ u32 acpi_id, int *apic_id)
+{
+ struct acpi_madt_local_apic *lapic =
+ (struct acpi_madt_local_apic *)entry;
+ if ((lapic->lapic_flags & ACPI_MADT_ENABLED) &&
+ lapic->processor_id == acpi_id) {
+ *apic_id = lapic->id;
+ return 1;
+ }
+ return 0;
+}
+
+static int map_x2apic_id(struct acpi_subtable_header *entry,
+ int device_declaration, u32 acpi_id, int *apic_id)
+{
+ struct acpi_madt_local_x2apic *apic =
+ (struct acpi_madt_local_x2apic *)entry;
+ u32 tmp = apic->local_apic_id;
+
+ /* Only check enabled APICs*/
+ if (!(apic->lapic_flags & ACPI_MADT_ENABLED))
+ return 0;
+
+ /* Device statement declaration type */
+ if (device_declaration) {
+ if (apic->uid == acpi_id)
+ goto found;
+ }
+
+ return 0;
+found:
+ *apic_id = tmp;
+ return 1;
+}
+
+static int map_lsapic_id(struct acpi_subtable_header *entry,
+ int device_declaration, u32 acpi_id, int *apic_id)
+{
+ struct acpi_madt_local_sapic *lsapic =
+ (struct acpi_madt_local_sapic *)entry;
+ u32 tmp = (lsapic->id << 8) | lsapic->eid;
+
+ /* Only check enabled APICs*/
+ if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))
+ return 0;
+
+ /* Device statement declaration type */
+ if (device_declaration) {
+ if (entry->length < 16)
+ printk(KERN_ERR PREFIX
+ "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n",
+ tmp);
+ else if (lsapic->uid == acpi_id)
+ goto found;
+ /* Processor statement declaration type */
+ } else if (lsapic->processor_id == acpi_id)
+ goto found;
+
+ return 0;
+found:
+ *apic_id = tmp;
+ return 1;
+}
+
+static int map_madt_entry(int type, u32 acpi_id)
+{
+ unsigned long madt_end, entry;
+ int apic_id = -1;
+
+ if (!madt)
+ return apic_id;
+
+ entry = (unsigned long)madt;
+ madt_end = entry + madt->header.length;
+
+ /* Parse all entries looking for a match. */
+
+ entry += sizeof(struct acpi_table_madt);
+ while (entry + sizeof(struct acpi_subtable_header) < madt_end) {
+ struct acpi_subtable_header *header =
+ (struct acpi_subtable_header *)entry;
+ if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
+ if (map_lapic_id(header, acpi_id, &apic_id))
+ break;
+ } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) {
+ if (map_x2apic_id(header, type, acpi_id, &apic_id))
+ break;
+ } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
+ if (map_lsapic_id(header, type, acpi_id, &apic_id))
+ break;
+ }
+ entry += header->length;
+ }
+ return apic_id;
+}
+
+static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
+{
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *obj;
+ struct acpi_subtable_header *header;
+ int apic_id = -1;
+
+ if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
+ goto exit;
+
+ if (!buffer.length || !buffer.pointer)
+ goto exit;
+
+ obj = buffer.pointer;
+ if (obj->type != ACPI_TYPE_BUFFER ||
+ obj->buffer.length < sizeof(struct acpi_subtable_header)) {
+ goto exit;
+ }
+
+ header = (struct acpi_subtable_header *)obj->buffer.pointer;
+ if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) {
+ map_lapic_id(header, acpi_id, &apic_id);
+ } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) {
+ map_lsapic_id(header, type, acpi_id, &apic_id);
+ }
+
+exit:
+ if (buffer.pointer)
+ kfree(buffer.pointer);
+ return apic_id;
+}
+
+static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id)
+{
+ int i;
+ int apic_id = -1;
+
+ apic_id = map_mat_entry(handle, type, acpi_id);
+ if (apic_id == -1)
+ apic_id = map_madt_entry(type, acpi_id);
+ if (apic_id == -1)
+ return apic_id;
+
+ for_each_possible_cpu(i) {
+ if (cpu_physical_id(i) == apic_id)
+ return i;
+ }
+ return -1;
+}
+#endif
+
+/* --------------------------------------------------------------------------
+ Driver Interface
+ -------------------------------------------------------------------------- */
+
+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))) {
+ 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;
+}
+
+static DEFINE_PER_CPU(void *, processor_device_array);
+
+static void acpi_processor_notify(struct acpi_device *device, u32 event)
+{
+ struct acpi_processor *pr = acpi_driver_data(device);
+ int saved;
+
+ if (!pr)
+ return;
+
+ switch (event) {
+ case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
+ saved = pr->performance_platform_limit;
+ acpi_processor_ppc_has_changed(pr, 1);
+ if (saved == pr->performance_platform_limit)
+ break;
+ acpi_bus_generate_proc_event(device, event,
+ pr->performance_platform_limit);
+ acpi_bus_generate_netlink_event(device->pnp.device_class,
+ dev_name(&device->dev), event,
+ pr->performance_platform_limit);
+ break;
+ case ACPI_PROCESSOR_NOTIFY_POWER:
+ acpi_processor_cst_has_changed(pr);
+ acpi_bus_generate_proc_event(device, event, 0);
+ acpi_bus_generate_netlink_event(device->pnp.device_class,
+ dev_name(&device->dev), event, 0);
+ break;
+ case ACPI_PROCESSOR_NOTIFY_THROTTLING:
+ acpi_processor_tstate_has_changed(pr);
+ acpi_bus_generate_proc_event(device, event, 0);
+ acpi_bus_generate_netlink_event(device->pnp.device_class,
+ dev_name(&device->dev), event, 0);
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Unsupported event [0x%x]\n", event));
+ break;
+ }
+
+ return;
+}
+
+static int acpi_cpu_soft_notify(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
+{
+ unsigned int cpu = (unsigned long)hcpu;
+ struct acpi_processor *pr = per_cpu(processors, cpu);
+
+ if (action == CPU_ONLINE && pr) {
+ acpi_processor_ppc_has_changed(pr, 0);
+ acpi_processor_cst_has_changed(pr);
+ acpi_processor_tstate_has_changed(pr);
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block acpi_cpu_notifier =
+{
+ .notifier_call = acpi_cpu_soft_notify,
+};
+
+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;
+
+ result = acpi_processor_get_info(device);
+ if (result) {
+ /* Processor is physically not present */
+ return 0;
+ }
+
+ BUG_ON((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
+ */
+ if (per_cpu(processor_device_array, pr->id) != NULL &&
+ per_cpu(processor_device_array, pr->id) != device) {
+ printk(KERN_WARNING "BIOS reported wrong ACPI id "
+ "for the processor\n");
+ result = -ENODEV;
+ goto err_free_cpumask;
+ }
+ per_cpu(processor_device_array, pr->id) = device;
+
+ per_cpu(processors, pr->id) = pr;
+
+ result = acpi_processor_add_fs(device);
+ if (result)
+ goto err_free_cpumask;
+
+ 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.). */
+ acpi_processor_set_pdc(pr->handle);
+
+#ifdef CONFIG_CPU_FREQ
+ acpi_processor_ppc_has_changed(pr, 0);
+#endif
+ acpi_processor_get_throttling_info(pr);
+ acpi_processor_get_limit_info(pr);
+
+
+ acpi_processor_power_init(pr, device);
+
+ 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_dbg(&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 (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);
+
+ 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;
+ }
+
+ per_cpu(processors, pr->id) = NULL;
+ per_cpu(processor_device_array, pr->id) = NULL;
+
+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_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;
+ }
+
+ return 0;
+}
+
+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;
+ }
+ 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;
+ }
+ break;
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Unsupported event [0x%x]\n", event));
+ break;
+ }
+
+ return;
+}
+
+static acpi_status
+processor_walk_namespace_cb(acpi_handle handle,
+ u32 lvl, void *context, void **rv)
+{
+ acpi_status status;
+ int *action = context;
+ acpi_object_type type = 0;
+
+ status = acpi_get_type(handle, &type);
+ if (ACPI_FAILURE(status))
+ return (AE_OK);
+
+ if (type != ACPI_TYPE_PROCESSOR)
+ return (AE_OK);
+
+ switch (*action) {
+ case INSTALL_NOTIFY_HANDLER:
+ acpi_install_notify_handler(handle,
+ ACPI_SYSTEM_NOTIFY,
+ acpi_processor_hotplug_notify,
+ NULL);
+ break;
+ case UNINSTALL_NOTIFY_HANDLER:
+ acpi_remove_notify_handler(handle,
+ ACPI_SYSTEM_NOTIFY,
+ acpi_processor_hotplug_notify);
+ break;
+ default:
+ break;
+ }
+
+ return (AE_OK);
+}
+
+static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
+{
+
+ if (!is_processor_present(handle)) {
+ return AE_ERROR;
+ }
+
+ if (acpi_map_lsapic(handle, p_cpu))
+ return AE_ERROR;
+
+ if (arch_register_cpu(*p_cpu)) {
+ acpi_unmap_lsapic(*p_cpu);
+ return AE_ERROR;
+ }
+
+ return AE_OK;
+}
+
+static int acpi_processor_handle_eject(struct acpi_processor *pr)
+{
+ if (cpu_online(pr->id))
+ cpu_down(pr->id);
+
+ arch_unregister_cpu(pr->id);
+ acpi_unmap_lsapic(pr->id);
+ return (0);
+}
+#else
+static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
+{
+ return AE_ERROR;
+}
+static int acpi_processor_handle_eject(struct acpi_processor *pr)
+{
+ return (-EINVAL);
+}
+#endif
+
+static
+void acpi_processor_install_hotplug_notify(void)
+{
+#ifdef CONFIG_ACPI_HOTPLUG_CPU
+ int action = INSTALL_NOTIFY_HANDLER;
+ acpi_walk_namespace(ACPI_TYPE_PROCESSOR,
+ ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX,
+ processor_walk_namespace_cb, NULL, &action, NULL);
+#endif
+ register_hotcpu_notifier(&acpi_cpu_notifier);
+}
+
+static
+void acpi_processor_uninstall_hotplug_notify(void)
+{
+#ifdef CONFIG_ACPI_HOTPLUG_CPU
+ int action = UNINSTALL_NOTIFY_HANDLER;
+ acpi_walk_namespace(ACPI_TYPE_PROCESSOR,
+ ACPI_ROOT_OBJECT,
+ ACPI_UINT32_MAX,
+ processor_walk_namespace_cb, NULL, &action, NULL);
+#endif
+ unregister_hotcpu_notifier(&acpi_cpu_notifier);
+}
+
+/*
+ * We keep the driver loaded even when ACPI is not running.
+ * This is needed for the powernow-k8 driver, that works even without
+ * ACPI, but needs symbols from this driver
+ */
+
+static int __init acpi_processor_init(void)
+{
+ int result = 0;
+
+ if (acpi_disabled)
+ return 0;
+
+ memset(&errata, 0, sizeof(errata));
+
+#ifdef CONFIG_SMP
+ if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
+ (struct acpi_table_header **)&madt)))
+ madt = NULL;
+#endif
+#ifdef CONFIG_ACPI_PROCFS
+ acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir);
+ if (!acpi_processor_dir)
+ return -ENOMEM;
+#endif
+ result = cpuidle_register_driver(&acpi_idle_driver);
+ if (result < 0)
+ goto out_proc;
+
+ result = acpi_bus_register_driver(&acpi_processor_driver);
+ if (result < 0)
+ goto out_cpuidle;
+
+ acpi_processor_install_hotplug_notify();
+
+ acpi_thermal_cpufreq_init();
+
+ acpi_processor_ppc_init();
+
+ acpi_processor_throttling_init();
+
+ return 0;
+
+out_cpuidle:
+ cpuidle_unregister_driver(&acpi_idle_driver);
+
+out_proc:
+#ifdef CONFIG_ACPI_PROCFS
+ remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
+#endif
+
+ return result;
+}
+
+static void __exit acpi_processor_exit(void)
+{
+ if (acpi_disabled)
+ return;
+
+ acpi_processor_ppc_exit();
+
+ acpi_thermal_cpufreq_exit();
+
+ acpi_processor_uninstall_hotplug_notify();
+
+ acpi_bus_unregister_driver(&acpi_processor_driver);
+
+ cpuidle_unregister_driver(&acpi_idle_driver);
+
+#ifdef CONFIG_ACPI_PROCFS
+ remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir);
+#endif
+
+ return;
+}
+
+module_init(acpi_processor_init);
+module_exit(acpi_processor_exit);
+
+EXPORT_SYMBOL(acpi_processor_set_thermal_limit);
+
+MODULE_ALIAS("processor");
projects / deliverable / linux.git / commitdiff
