Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acpi_processor.c - ACPI Processor Driver ($Revision: 71 $) |
| 3 | * |
| 4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 6 | * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de> |
| 7 | * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> |
| 8 | * - Added processor hotplug support |
| 9 | * |
| 10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or (at |
| 15 | * your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, but |
| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License along |
| 23 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 24 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 25 | * |
| 26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 27 | * TBD: |
| 28 | * 1. Make # power states dynamic. |
| 29 | * 2. Support duty_cycle values that span bit 4. |
| 30 | * 3. Optimize by having scheduler determine business instead of |
| 31 | * having us try to calculate it here. |
| 32 | * 4. Need C1 timing -- must modify kernel (IRQ handler) to get this. |
| 33 | */ |
| 34 | |
| 35 | #include <linux/kernel.h> |
| 36 | #include <linux/module.h> |
| 37 | #include <linux/init.h> |
| 38 | #include <linux/types.h> |
| 39 | #include <linux/pci.h> |
| 40 | #include <linux/pm.h> |
| 41 | #include <linux/cpufreq.h> |
| 42 | #include <linux/cpu.h> |
| 43 | #include <linux/proc_fs.h> |
| 44 | #include <linux/seq_file.h> |
| 45 | #include <linux/dmi.h> |
| 46 | #include <linux/moduleparam.h> |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 47 | #include <linux/cpuidle.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | #include <asm/io.h> |
| 50 | #include <asm/system.h> |
| 51 | #include <asm/cpu.h> |
| 52 | #include <asm/delay.h> |
| 53 | #include <asm/uaccess.h> |
| 54 | #include <asm/processor.h> |
| 55 | #include <asm/smp.h> |
| 56 | #include <asm/acpi.h> |
| 57 | |
| 58 | #include <acpi/acpi_bus.h> |
| 59 | #include <acpi/acpi_drivers.h> |
| 60 | #include <acpi/processor.h> |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #define ACPI_PROCESSOR_CLASS "processor" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
| 64 | #define ACPI_PROCESSOR_FILE_INFO "info" |
| 65 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" |
| 66 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" |
| 67 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 |
| 68 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 69 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | #define ACPI_PROCESSOR_LIMIT_USER 0 |
| 72 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 |
| 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 75 | ACPI_MODULE_NAME("processor_core"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 77 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 78 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | MODULE_LICENSE("GPL"); |
| 80 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 81 | static int acpi_processor_add(struct acpi_device *device); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 82 | static int acpi_processor_remove(struct acpi_device *device, int type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 84 | static void acpi_processor_notify(struct acpi_device *device, u32 event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
| 86 | static int acpi_processor_handle_eject(struct acpi_processor *pr); |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 89 | static const struct acpi_device_id processor_device_ids[] = { |
Myron Stowe | ad93a76 | 2008-11-04 14:52:55 -0700 | [diff] [blame] | 90 | {ACPI_PROCESSOR_OBJECT_HID, 0}, |
Bjorn Helgaas | 9eccbc2 | 2009-04-27 16:33:46 -0600 | [diff] [blame] | 91 | {"ACPI0007", 0}, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 92 | {"", 0}, |
| 93 | }; |
| 94 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); |
| 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | static struct acpi_driver acpi_processor_driver = { |
Len Brown | c2b6705b | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 97 | .name = "processor", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 98 | .class = ACPI_PROCESSOR_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 99 | .ids = processor_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | .ops = { |
| 101 | .add = acpi_processor_add, |
| 102 | .remove = acpi_processor_remove, |
Thomas Gleixner | b04e7bd | 2007-09-22 22:29:05 +0000 | [diff] [blame] | 103 | .suspend = acpi_processor_suspend, |
| 104 | .resume = acpi_processor_resume, |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 105 | .notify = acpi_processor_notify, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 106 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | }; |
| 108 | |
| 109 | #define INSTALL_NOTIFY_HANDLER 1 |
| 110 | #define UNINSTALL_NOTIFY_HANDLER 2 |
| 111 | |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 112 | static const struct file_operations acpi_processor_info_fops = { |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 113 | .owner = THIS_MODULE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 114 | .open = acpi_processor_info_open_fs, |
| 115 | .read = seq_read, |
| 116 | .llseek = seq_lseek, |
| 117 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | }; |
| 119 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 120 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
Andreas Mohr | 9f22271 | 2006-06-23 02:04:27 -0700 | [diff] [blame] | 121 | struct acpi_processor_errata errata __read_mostly; |
Zhao Yakui | 2a2a647 | 2008-06-24 18:02:57 +0800 | [diff] [blame] | 122 | static int set_no_mwait(const struct dmi_system_id *id) |
| 123 | { |
| 124 | printk(KERN_NOTICE PREFIX "%s detected - " |
Pavel Machek | d005741 | 2008-08-12 12:24:34 +0200 | [diff] [blame] | 125 | "disabling mwait for CPU C-states\n", id->ident); |
Zhao Yakui | 2a2a647 | 2008-06-24 18:02:57 +0800 | [diff] [blame] | 126 | idle_nomwait = 1; |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { |
| 131 | { |
| 132 | set_no_mwait, "IFL91 board", { |
| 133 | DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), |
| 134 | DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"), |
| 135 | DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"), |
| 136 | DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL}, |
| 137 | { |
| 138 | set_no_mwait, "Extensa 5220", { |
| 139 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), |
Dennis Jansen | 3df8a90 | 2008-08-15 01:28:57 +0200 | [diff] [blame] | 140 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
Zhao Yakui | 2a2a647 | 2008-06-24 18:02:57 +0800 | [diff] [blame] | 141 | DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), |
| 142 | DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, |
| 143 | {}, |
| 144 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | /* -------------------------------------------------------------------------- |
| 147 | Errata Handling |
| 148 | -------------------------------------------------------------------------- */ |
| 149 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 150 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 152 | u8 value1 = 0; |
| 153 | u8 value2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
| 156 | if (!dev) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 157 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
| 159 | /* |
| 160 | * Note that 'dev' references the PIIX4 ACPI Controller. |
| 161 | */ |
| 162 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 163 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | case 0: |
| 165 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); |
| 166 | break; |
| 167 | case 1: |
| 168 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); |
| 169 | break; |
| 170 | case 2: |
| 171 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); |
| 172 | break; |
| 173 | case 3: |
| 174 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); |
| 175 | break; |
| 176 | default: |
| 177 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); |
| 178 | break; |
| 179 | } |
| 180 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 181 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
| 183 | case 0: /* PIIX4 A-step */ |
| 184 | case 1: /* PIIX4 B-step */ |
| 185 | /* |
| 186 | * See specification changes #13 ("Manual Throttle Duty Cycle") |
| 187 | * and #14 ("Enabling and Disabling Manual Throttle"), plus |
| 188 | * erratum #5 ("STPCLK# Deassertion Time") from the January |
| 189 | * 2002 PIIX4 specification update. Applies to only older |
| 190 | * PIIX4 models. |
| 191 | */ |
| 192 | errata.piix4.throttle = 1; |
| 193 | |
| 194 | case 2: /* PIIX4E */ |
| 195 | case 3: /* PIIX4M */ |
| 196 | /* |
| 197 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA |
| 198 | * Livelock") from the January 2002 PIIX4 specification update. |
| 199 | * Applies to all PIIX4 models. |
| 200 | */ |
| 201 | |
| 202 | /* |
| 203 | * BM-IDE |
| 204 | * ------ |
| 205 | * Find the PIIX4 IDE Controller and get the Bus Master IDE |
| 206 | * Status register address. We'll use this later to read |
| 207 | * each IDE controller's DMA status to make sure we catch all |
| 208 | * DMA activity. |
| 209 | */ |
| 210 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 211 | PCI_DEVICE_ID_INTEL_82371AB, |
| 212 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | if (dev) { |
| 214 | errata.piix4.bmisx = pci_resource_start(dev, 4); |
| 215 | pci_dev_put(dev); |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Type-F DMA |
| 220 | * ---------- |
| 221 | * Find the PIIX4 ISA Controller and read the Motherboard |
| 222 | * DMA controller's status to see if Type-F (Fast) DMA mode |
| 223 | * is enabled (bit 7) on either channel. Note that we'll |
| 224 | * disable C3 support if this is enabled, as some legacy |
| 225 | * devices won't operate well if fast DMA is disabled. |
| 226 | */ |
| 227 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 228 | PCI_DEVICE_ID_INTEL_82371AB_0, |
| 229 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | if (dev) { |
| 231 | pci_read_config_byte(dev, 0x76, &value1); |
| 232 | pci_read_config_byte(dev, 0x77, &value2); |
| 233 | if ((value1 & 0x80) || (value2 & 0x80)) |
| 234 | errata.piix4.fdma = 1; |
| 235 | pci_dev_put(dev); |
| 236 | } |
| 237 | |
| 238 | break; |
| 239 | } |
| 240 | |
| 241 | if (errata.piix4.bmisx) |
| 242 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 243 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | if (errata.piix4.fdma) |
| 245 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 246 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 248 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Adrian Bunk | 8713cbe | 2005-09-02 17:16:48 -0400 | [diff] [blame] | 251 | static int acpi_processor_errata(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 253 | int result = 0; |
| 254 | struct pci_dev *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
| 257 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 258 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
| 260 | /* |
| 261 | * PIIX4 |
| 262 | */ |
| 263 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 264 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
| 265 | PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | if (dev) { |
| 267 | result = acpi_processor_errata_piix4(dev); |
| 268 | pci_dev_put(dev); |
| 269 | } |
| 270 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 271 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | } |
| 273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | /* -------------------------------------------------------------------------- |
Akinobu Mita | 0b28002 | 2006-03-26 01:38:58 -0800 | [diff] [blame] | 275 | Common ACPI processor functions |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 276 | -------------------------------------------------------------------------- */ |
| 277 | |
| 278 | /* |
| 279 | * _PDC is required for a BIOS-OS handshake for most of the newer |
| 280 | * ACPI processor features. |
| 281 | */ |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 282 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 283 | { |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 284 | struct acpi_object_list *pdc_in = pr->pdc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 285 | acpi_status status = AE_OK; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 286 | |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 287 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 288 | if (!pdc_in) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 289 | return status; |
Zhao Yakui | da5e09a | 2008-06-24 18:01:09 +0800 | [diff] [blame] | 290 | if (idle_nomwait) { |
| 291 | /* |
| 292 | * If mwait is disabled for CPU C-states, the C2C3_FFH access |
| 293 | * mode will be disabled in the parameter of _PDC object. |
| 294 | * Of course C1_FFH access mode will also be disabled. |
| 295 | */ |
| 296 | union acpi_object *obj; |
| 297 | u32 *buffer = NULL; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 298 | |
Zhao Yakui | da5e09a | 2008-06-24 18:01:09 +0800 | [diff] [blame] | 299 | obj = pdc_in->pointer; |
| 300 | buffer = (u32 *)(obj->buffer.pointer); |
| 301 | buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); |
| 302 | |
| 303 | } |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 304 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 305 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 306 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 307 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 308 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 309 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 310 | return status; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 311 | } |
| 312 | |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 313 | /* -------------------------------------------------------------------------- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | FS Interface (/proc) |
| 315 | -------------------------------------------------------------------------- */ |
| 316 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 317 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
| 319 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) |
| 320 | { |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 321 | struct acpi_processor *pr = seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | if (!pr) |
| 325 | goto end; |
| 326 | |
| 327 | seq_printf(seq, "processor id: %d\n" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 328 | "acpi id: %d\n" |
| 329 | "bus mastering control: %s\n" |
| 330 | "power management: %s\n" |
| 331 | "throttling control: %s\n" |
| 332 | "limit interface: %s\n", |
| 333 | pr->id, |
| 334 | pr->acpi_id, |
| 335 | pr->flags.bm_control ? "yes" : "no", |
| 336 | pr->flags.power ? "yes" : "no", |
| 337 | pr->flags.throttling ? "yes" : "no", |
| 338 | pr->flags.limit ? "yes" : "no"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 340 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 341 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) |
| 345 | { |
| 346 | return single_open(file, acpi_processor_info_seq_show, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 347 | PDE(inode)->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 350 | static int acpi_processor_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 352 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
| 355 | if (!acpi_device_dir(device)) { |
| 356 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 357 | acpi_processor_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 359 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
| 362 | /* 'info' [R] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 363 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
| 364 | S_IRUGO, acpi_device_dir(device), |
| 365 | &acpi_processor_info_fops, |
| 366 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 368 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | |
| 370 | /* 'throttling' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 371 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
| 372 | S_IFREG | S_IRUGO | S_IWUSR, |
| 373 | acpi_device_dir(device), |
| 374 | &acpi_processor_throttling_fops, |
| 375 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 377 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
| 379 | /* 'limit' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 380 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
| 381 | S_IFREG | S_IRUGO | S_IWUSR, |
| 382 | acpi_device_dir(device), |
| 383 | &acpi_processor_limit_fops, |
| 384 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 386 | return -EIO; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 387 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
| 389 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 390 | static int acpi_processor_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | |
| 393 | if (acpi_device_dir(device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 394 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
| 395 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 397 | acpi_device_dir(device)); |
| 398 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, |
| 399 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
| 401 | acpi_device_dir(device) = NULL; |
| 402 | } |
| 403 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 404 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | /* Use the acpiid in MADT to map cpus in case of SMP */ |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | #ifndef CONFIG_SMP |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 410 | static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { return -1; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | #else |
| 412 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 413 | static struct acpi_table_madt *madt; |
| 414 | |
| 415 | static int map_lapic_id(struct acpi_subtable_header *entry, |
| 416 | u32 acpi_id, int *apic_id) |
| 417 | { |
| 418 | struct acpi_madt_local_apic *lapic = |
| 419 | (struct acpi_madt_local_apic *)entry; |
| 420 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && |
| 421 | lapic->processor_id == acpi_id) { |
| 422 | *apic_id = lapic->id; |
| 423 | return 1; |
| 424 | } |
| 425 | return 0; |
| 426 | } |
| 427 | |
Suresh Siddha | 7237d3d | 2009-03-30 13:55:30 -0800 | [diff] [blame] | 428 | static int map_x2apic_id(struct acpi_subtable_header *entry, |
| 429 | int device_declaration, u32 acpi_id, int *apic_id) |
| 430 | { |
| 431 | struct acpi_madt_local_x2apic *apic = |
| 432 | (struct acpi_madt_local_x2apic *)entry; |
| 433 | u32 tmp = apic->local_apic_id; |
| 434 | |
| 435 | /* Only check enabled APICs*/ |
| 436 | if (!(apic->lapic_flags & ACPI_MADT_ENABLED)) |
| 437 | return 0; |
| 438 | |
| 439 | /* Device statement declaration type */ |
| 440 | if (device_declaration) { |
| 441 | if (apic->uid == acpi_id) |
| 442 | goto found; |
| 443 | } |
| 444 | |
| 445 | return 0; |
| 446 | found: |
| 447 | *apic_id = tmp; |
| 448 | return 1; |
| 449 | } |
| 450 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 451 | static int map_lsapic_id(struct acpi_subtable_header *entry, |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 452 | int device_declaration, u32 acpi_id, int *apic_id) |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 453 | { |
| 454 | struct acpi_madt_local_sapic *lsapic = |
| 455 | (struct acpi_madt_local_sapic *)entry; |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 456 | u32 tmp = (lsapic->id << 8) | lsapic->eid; |
| 457 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 458 | /* Only check enabled APICs*/ |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 459 | if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED)) |
| 460 | return 0; |
| 461 | |
| 462 | /* Device statement declaration type */ |
| 463 | if (device_declaration) { |
| 464 | if (entry->length < 16) |
| 465 | printk(KERN_ERR PREFIX |
| 466 | "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n", |
| 467 | tmp); |
| 468 | else if (lsapic->uid == acpi_id) |
| 469 | goto found; |
| 470 | /* Processor statement declaration type */ |
| 471 | } else if (lsapic->processor_id == acpi_id) |
| 472 | goto found; |
| 473 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 474 | return 0; |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 475 | found: |
| 476 | *apic_id = tmp; |
| 477 | return 1; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 478 | } |
| 479 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 480 | static int map_madt_entry(int type, u32 acpi_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | { |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 482 | unsigned long madt_end, entry; |
| 483 | int apic_id = -1; |
| 484 | |
| 485 | if (!madt) |
| 486 | return apic_id; |
| 487 | |
| 488 | entry = (unsigned long)madt; |
| 489 | madt_end = entry + madt->header.length; |
| 490 | |
| 491 | /* Parse all entries looking for a match. */ |
| 492 | |
| 493 | entry += sizeof(struct acpi_table_madt); |
| 494 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { |
| 495 | struct acpi_subtable_header *header = |
| 496 | (struct acpi_subtable_header *)entry; |
| 497 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { |
| 498 | if (map_lapic_id(header, acpi_id, &apic_id)) |
| 499 | break; |
Suresh Siddha | 7237d3d | 2009-03-30 13:55:30 -0800 | [diff] [blame] | 500 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) { |
| 501 | if (map_x2apic_id(header, type, acpi_id, &apic_id)) |
| 502 | break; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 503 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 504 | if (map_lsapic_id(header, type, acpi_id, &apic_id)) |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 505 | break; |
| 506 | } |
| 507 | entry += header->length; |
| 508 | } |
| 509 | return apic_id; |
| 510 | } |
| 511 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 512 | static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 513 | { |
| 514 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 515 | union acpi_object *obj; |
| 516 | struct acpi_subtable_header *header; |
| 517 | int apic_id = -1; |
| 518 | |
| 519 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) |
| 520 | goto exit; |
| 521 | |
| 522 | if (!buffer.length || !buffer.pointer) |
| 523 | goto exit; |
| 524 | |
| 525 | obj = buffer.pointer; |
| 526 | if (obj->type != ACPI_TYPE_BUFFER || |
| 527 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { |
| 528 | goto exit; |
| 529 | } |
| 530 | |
| 531 | header = (struct acpi_subtable_header *)obj->buffer.pointer; |
| 532 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { |
| 533 | map_lapic_id(header, acpi_id, &apic_id); |
| 534 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 535 | map_lsapic_id(header, type, acpi_id, &apic_id); |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 536 | } |
| 537 | |
| 538 | exit: |
| 539 | if (buffer.pointer) |
| 540 | kfree(buffer.pointer); |
| 541 | return apic_id; |
| 542 | } |
| 543 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 544 | static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 545 | { |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 546 | int i; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 547 | int apic_id = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 549 | apic_id = map_mat_entry(handle, type, acpi_id); |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 550 | if (apic_id == -1) |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 551 | apic_id = map_madt_entry(type, acpi_id); |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 552 | if (apic_id == -1) |
| 553 | return apic_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 555 | for_each_possible_cpu(i) { |
Mike Travis | 71b3123 | 2007-10-19 20:35:03 +0200 | [diff] [blame] | 556 | if (cpu_physical_id(i) == apic_id) |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 557 | return i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | } |
| 559 | return -1; |
| 560 | } |
| 561 | #endif |
| 562 | |
| 563 | /* -------------------------------------------------------------------------- |
| 564 | Driver Interface |
| 565 | -------------------------------------------------------------------------- */ |
| 566 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 567 | static int acpi_processor_get_info(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 569 | acpi_status status = 0; |
| 570 | union acpi_object object = { 0 }; |
| 571 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 572 | struct acpi_processor *pr; |
| 573 | int cpu_index, device_declaration = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 574 | static int cpu0_initialized; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 576 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 578 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
| 580 | if (num_online_cpus() > 1) |
| 581 | errata.smp = TRUE; |
| 582 | |
| 583 | acpi_processor_errata(pr); |
| 584 | |
| 585 | /* |
| 586 | * Check to see if we have bus mastering arbitration control. This |
| 587 | * is required for proper C3 usage (to maintain cache coherency). |
| 588 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 589 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | pr->flags.bm_control = 1; |
| 591 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 592 | "Bus mastering arbitration control present\n")); |
| 593 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 595 | "No bus mastering arbitration control\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
Bjorn Helgaas | 6cc73b4 | 2009-04-27 16:33:41 -0600 | [diff] [blame] | 597 | if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { |
| 598 | /* Declared with "Processor" statement; match ProcessorID */ |
| 599 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); |
| 600 | if (ACPI_FAILURE(status)) { |
| 601 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); |
| 602 | return -ENODEV; |
| 603 | } |
| 604 | |
| 605 | /* |
| 606 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. |
| 607 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in |
| 608 | * arch/xxx/acpi.c |
| 609 | */ |
| 610 | pr->acpi_id = object.processor.proc_id; |
| 611 | } else { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 612 | /* |
| 613 | * Declared with "Device" statement; match _UID. |
| 614 | * Note that we don't handle string _UIDs yet. |
| 615 | */ |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 616 | unsigned long long value; |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 617 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
| 618 | NULL, &value); |
| 619 | if (ACPI_FAILURE(status)) { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 620 | printk(KERN_ERR PREFIX |
| 621 | "Evaluating processor _UID [%#x]\n", status); |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 622 | return -ENODEV; |
| 623 | } |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 624 | device_declaration = 1; |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 625 | pr->acpi_id = value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | } |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 627 | cpu_index = get_cpu_id(pr->handle, device_declaration, pr->acpi_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 629 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
Ashok Raj | df42baa | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 630 | if (!cpu0_initialized && (cpu_index == -1) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 631 | (num_online_cpus() == 1)) { |
| 632 | cpu_index = 0; |
| 633 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 635 | cpu0_initialized = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 637 | pr->id = cpu_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 639 | /* |
| 640 | * Extra Processor objects may be enumerated on MP systems with |
| 641 | * less than the max # of CPUs. They should be ignored _iff |
| 642 | * they are physically not present. |
| 643 | */ |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 644 | if (pr->id == -1) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 645 | if (ACPI_FAILURE |
| 646 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 647 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 648 | } |
| 649 | } |
Zhao Yakui | 7a04b84 | 2009-06-24 11:46:44 +0800 | [diff] [blame] | 650 | /* |
| 651 | * On some boxes several processors use the same processor bus id. |
| 652 | * But they are located in different scope. For example: |
| 653 | * \_SB.SCK0.CPU0 |
| 654 | * \_SB.SCK1.CPU0 |
| 655 | * Rename the processor device bus id. And the new bus id will be |
| 656 | * generated as the following format: |
| 657 | * CPU+CPU ID. |
| 658 | */ |
| 659 | sprintf(acpi_device_bid(device), "CPU%X", pr->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 661 | pr->acpi_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | |
| 663 | if (!object.processor.pblk_address) |
| 664 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); |
| 665 | else if (object.processor.pblk_length != 6) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 666 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
| 667 | object.processor.pblk_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | else { |
| 669 | pr->throttling.address = object.processor.pblk_address; |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 670 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
| 671 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
| 673 | pr->pblk = object.processor.pblk_address; |
| 674 | |
| 675 | /* |
| 676 | * We don't care about error returns - we just try to mark |
| 677 | * these reserved so that nobody else is confused into thinking |
| 678 | * that this region might be unused.. |
| 679 | * |
| 680 | * (In particular, allocating the IO range for Cardbus) |
| 681 | */ |
| 682 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); |
| 683 | } |
| 684 | |
Alex Chiang | fe086a7 | 2008-04-29 15:05:29 -0700 | [diff] [blame] | 685 | /* |
| 686 | * If ACPI describes a slot number for this CPU, we can use it |
| 687 | * ensure we get the right value in the "physical id" field |
| 688 | * of /proc/cpuinfo |
| 689 | */ |
| 690 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); |
| 691 | if (ACPI_SUCCESS(status)) |
| 692 | arch_fix_phys_package_id(pr->id, object.integer.value); |
| 693 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 694 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | } |
| 696 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 697 | static DEFINE_PER_CPU(void *, processor_device_array); |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 698 | |
Bjorn Helgaas | ddcd62d | 2009-06-22 20:41:14 +0000 | [diff] [blame] | 699 | static void acpi_processor_notify(struct acpi_device *device, u32 event) |
| 700 | { |
| 701 | struct acpi_processor *pr = acpi_driver_data(device); |
| 702 | int saved; |
| 703 | |
| 704 | if (!pr) |
| 705 | return; |
| 706 | |
| 707 | switch (event) { |
| 708 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: |
| 709 | saved = pr->performance_platform_limit; |
| 710 | acpi_processor_ppc_has_changed(pr); |
| 711 | if (saved == pr->performance_platform_limit) |
| 712 | break; |
| 713 | acpi_bus_generate_proc_event(device, event, |
| 714 | pr->performance_platform_limit); |
| 715 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
| 716 | dev_name(&device->dev), event, |
| 717 | pr->performance_platform_limit); |
| 718 | break; |
| 719 | case ACPI_PROCESSOR_NOTIFY_POWER: |
| 720 | acpi_processor_cst_has_changed(pr); |
| 721 | acpi_bus_generate_proc_event(device, event, 0); |
| 722 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
| 723 | dev_name(&device->dev), event, 0); |
| 724 | break; |
| 725 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
| 726 | acpi_processor_tstate_has_changed(pr); |
| 727 | acpi_bus_generate_proc_event(device, event, 0); |
| 728 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
| 729 | dev_name(&device->dev), event, 0); |
| 730 | default: |
| 731 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 732 | "Unsupported event [0x%x]\n", event)); |
| 733 | break; |
| 734 | } |
| 735 | |
| 736 | return; |
| 737 | } |
| 738 | |
| 739 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
| 740 | unsigned long action, void *hcpu) |
| 741 | { |
| 742 | unsigned int cpu = (unsigned long)hcpu; |
| 743 | struct acpi_processor *pr = per_cpu(processors, cpu); |
| 744 | |
| 745 | if (action == CPU_ONLINE && pr) { |
| 746 | acpi_processor_ppc_has_changed(pr); |
| 747 | acpi_processor_cst_has_changed(pr); |
| 748 | acpi_processor_tstate_has_changed(pr); |
| 749 | } |
| 750 | return NOTIFY_OK; |
| 751 | } |
| 752 | |
| 753 | static struct notifier_block acpi_cpu_notifier = |
| 754 | { |
| 755 | .notifier_call = acpi_cpu_soft_notify, |
| 756 | }; |
| 757 | |
| 758 | static int acpi_processor_add(struct acpi_device *device) |
| 759 | { |
| 760 | struct acpi_processor *pr = NULL; |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame^] | 761 | int result = 0; |
| 762 | struct sys_device *sysdev; |
Bjorn Helgaas | ddcd62d | 2009-06-22 20:41:14 +0000 | [diff] [blame] | 763 | |
| 764 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
| 765 | if (!pr) |
| 766 | return -ENOMEM; |
| 767 | |
| 768 | if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { |
| 769 | kfree(pr); |
| 770 | return -ENOMEM; |
| 771 | } |
| 772 | |
| 773 | pr->handle = device->handle; |
| 774 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); |
| 775 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); |
| 776 | device->driver_data = pr; |
| 777 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 778 | result = acpi_processor_get_info(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | if (result) { |
| 780 | /* Processor is physically not present */ |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 781 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | } |
| 783 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 784 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 786 | /* |
| 787 | * Buggy BIOS check |
| 788 | * ACPI id of processors can be reported wrongly by the BIOS. |
| 789 | * Don't trust it blindly |
| 790 | */ |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 791 | if (per_cpu(processor_device_array, pr->id) != NULL && |
| 792 | per_cpu(processor_device_array, pr->id) != device) { |
Joe Perches | 4fdb2a0 | 2007-11-19 17:48:02 -0800 | [diff] [blame] | 793 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
Len Brown | 0eacee5 | 2006-03-31 00:37:23 -0500 | [diff] [blame] | 794 | "for the processor\n"); |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame^] | 795 | result = -ENODEV; |
| 796 | goto err_free_cpumask; |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 797 | } |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 798 | per_cpu(processor_device_array, pr->id) = device; |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 799 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 800 | per_cpu(processors, pr->id) = pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | |
| 802 | result = acpi_processor_add_fs(device); |
| 803 | if (result) |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame^] | 804 | goto err_free_cpumask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
Zhang Rui | 9f1eb99 | 2008-04-29 02:36:07 -0400 | [diff] [blame] | 806 | sysdev = get_cpu_sysdev(pr->id); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 807 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) { |
| 808 | result = -EFAULT; |
| 809 | goto err_remove_fs; |
| 810 | } |
Zhang Rui | 9f1eb99 | 2008-04-29 02:36:07 -0400 | [diff] [blame] | 811 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 812 | /* _PDC call should be done before doing anything else (if reqd.). */ |
| 813 | arch_acpi_processor_init_pdc(pr); |
| 814 | acpi_processor_set_pdc(pr); |
Pallipadi, Venkatesh | 7b768f0 | 2009-06-19 17:14:59 -0700 | [diff] [blame] | 815 | arch_acpi_processor_cleanup_pdc(pr); |
| 816 | |
Zhao Yakui | 0ac3c57 | 2007-11-15 17:05:46 +0800 | [diff] [blame] | 817 | #ifdef CONFIG_CPU_FREQ |
| 818 | acpi_processor_ppc_has_changed(pr); |
| 819 | #endif |
| 820 | acpi_processor_get_throttling_info(pr); |
| 821 | acpi_processor_get_limit_info(pr); |
| 822 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | acpi_processor_power_init(pr, device); |
| 825 | |
Zhang Rui | d9460fd2 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 826 | pr->cdev = thermal_cooling_device_register("Processor", device, |
| 827 | &processor_cooling_ops); |
Thomas Sujith | d76628c | 2008-02-15 18:26:54 -0500 | [diff] [blame] | 828 | if (IS_ERR(pr->cdev)) { |
| 829 | result = PTR_ERR(pr->cdev); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 830 | goto err_power_exit; |
Thomas Sujith | d76628c | 2008-02-15 18:26:54 -0500 | [diff] [blame] | 831 | } |
Zhang Rui | d9460fd2 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 832 | |
Greg Kroah-Hartman | fc3a882 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 833 | dev_info(&device->dev, "registered as cooling_device%d\n", |
| 834 | pr->cdev->id); |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 835 | |
| 836 | result = sysfs_create_link(&device->dev.kobj, |
| 837 | &pr->cdev->device.kobj, |
| 838 | "thermal_cooling"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 839 | if (result) { |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 840 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 841 | goto err_thermal_unregister; |
| 842 | } |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 843 | result = sysfs_create_link(&pr->cdev->device.kobj, |
| 844 | &device->dev.kobj, |
| 845 | "device"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 846 | if (result) { |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 847 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 848 | goto err_remove_sysfs; |
| 849 | } |
Zhang Rui | d9460fd2 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 850 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | if (pr->flags.throttling) { |
| 852 | printk(KERN_INFO PREFIX "%s [%s] (supports", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 853 | acpi_device_name(device), acpi_device_bid(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | printk(" %d throttling states", pr->throttling.state_count); |
| 855 | printk(")\n"); |
| 856 | } |
| 857 | |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 858 | return 0; |
| 859 | |
| 860 | err_remove_sysfs: |
| 861 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 862 | err_thermal_unregister: |
| 863 | thermal_cooling_device_unregister(pr->cdev); |
| 864 | err_power_exit: |
| 865 | acpi_processor_power_exit(pr, device); |
| 866 | err_remove_fs: |
| 867 | acpi_processor_remove_fs(device); |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame^] | 868 | err_free_cpumask: |
| 869 | free_cpumask_var(pr->throttling.shared_cpu_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 871 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | } |
| 873 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 874 | static int acpi_processor_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 876 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | |
| 879 | if (!device || !acpi_driver_data(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 880 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 882 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 884 | if (pr->id >= nr_cpu_ids) |
| 885 | goto free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
| 887 | if (type == ACPI_BUS_REMOVAL_EJECT) { |
| 888 | if (acpi_processor_handle_eject(pr)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 889 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | } |
| 891 | |
| 892 | acpi_processor_power_exit(pr, device); |
| 893 | |
Zhang Rui | 9f1eb99 | 2008-04-29 02:36:07 -0400 | [diff] [blame] | 894 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
| 895 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | acpi_processor_remove_fs(device); |
| 897 | |
Zhao Yakui | f28bb45 | 2008-02-15 08:34:37 +0800 | [diff] [blame] | 898 | if (pr->cdev) { |
| 899 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 900 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); |
| 901 | thermal_cooling_device_unregister(pr->cdev); |
| 902 | pr->cdev = NULL; |
| 903 | } |
Zhang Rui | d9460fd2 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 904 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 905 | per_cpu(processors, pr->id) = NULL; |
| 906 | per_cpu(processor_device_array, pr->id) = NULL; |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 907 | |
| 908 | free: |
| 909 | free_cpumask_var(pr->throttling.shared_cpu_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | kfree(pr); |
| 911 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 912 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | } |
| 914 | |
| 915 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 916 | /**************************************************************************** |
| 917 | * Acpi processor hotplug support * |
| 918 | ****************************************************************************/ |
| 919 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 920 | static int is_processor_present(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 922 | acpi_status status; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 923 | unsigned long long sta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
| 926 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 927 | |
| 928 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) |
| 929 | return 1; |
| 930 | |
Zhang Rui | d0ce46f | 2008-02-23 01:53:09 -0500 | [diff] [blame] | 931 | /* |
| 932 | * _STA is mandatory for a processor that supports hot plug |
| 933 | */ |
| 934 | if (status == AE_NOT_FOUND) |
| 935 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 936 | "Processor does not support hot plug\n")); |
| 937 | else |
| 938 | ACPI_EXCEPTION((AE_INFO, status, |
| 939 | "Processor Device is not present")); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 940 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | } |
| 942 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | static |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 944 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 946 | acpi_handle phandle; |
| 947 | struct acpi_device *pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | |
| 950 | if (acpi_get_parent(handle, &phandle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 951 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | } |
| 953 | |
| 954 | if (acpi_bus_get_device(phandle, &pdev)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 955 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 959 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | } |
| 961 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 962 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | } |
| 964 | |
Sam Ravnborg | b95e9e8 | 2008-02-17 13:22:48 +0100 | [diff] [blame] | 965 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
| 966 | u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 968 | struct acpi_processor *pr; |
| 969 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | int result; |
| 971 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
| 973 | switch (event) { |
| 974 | case ACPI_NOTIFY_BUS_CHECK: |
| 975 | case ACPI_NOTIFY_DEVICE_CHECK: |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 976 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 977 | "Processor driver received %s event\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 978 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 979 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
| 981 | if (!is_processor_present(handle)) |
| 982 | break; |
| 983 | |
| 984 | if (acpi_bus_get_device(handle, &device)) { |
| 985 | result = acpi_processor_device_add(handle, &device); |
| 986 | if (result) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 987 | printk(KERN_ERR PREFIX |
| 988 | "Unable to add the device\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | break; |
| 990 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 991 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 993 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 994 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | |
| 996 | if (acpi_bus_get_device(handle, &device)) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 997 | printk(KERN_ERR PREFIX |
| 998 | "Device don't exist, dropping EJECT\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | break; |
| 1000 | } |
| 1001 | pr = acpi_driver_data(device); |
| 1002 | if (!pr) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 1003 | printk(KERN_ERR PREFIX |
| 1004 | "Driver data is NULL, dropping EJECT\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1005 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | break; |
| 1008 | default: |
| 1009 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1010 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | break; |
| 1012 | } |
| 1013 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1014 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | } |
| 1016 | |
| 1017 | static acpi_status |
| 1018 | processor_walk_namespace_cb(acpi_handle handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1019 | u32 lvl, void *context, void **rv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1021 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | int *action = context; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1023 | acpi_object_type type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | |
| 1025 | status = acpi_get_type(handle, &type); |
| 1026 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1027 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | |
| 1029 | if (type != ACPI_TYPE_PROCESSOR) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1030 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1032 | switch (*action) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | case INSTALL_NOTIFY_HANDLER: |
| 1034 | acpi_install_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1035 | ACPI_SYSTEM_NOTIFY, |
| 1036 | acpi_processor_hotplug_notify, |
| 1037 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | break; |
| 1039 | case UNINSTALL_NOTIFY_HANDLER: |
| 1040 | acpi_remove_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1041 | ACPI_SYSTEM_NOTIFY, |
| 1042 | acpi_processor_hotplug_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | break; |
| 1044 | default: |
| 1045 | break; |
| 1046 | } |
| 1047 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1048 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | } |
| 1050 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1051 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | |
| 1054 | if (!is_processor_present(handle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1055 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | } |
| 1057 | |
| 1058 | if (acpi_map_lsapic(handle, p_cpu)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1059 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | |
| 1061 | if (arch_register_cpu(*p_cpu)) { |
| 1062 | acpi_unmap_lsapic(*p_cpu); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1063 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | } |
| 1065 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1066 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | } |
| 1068 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1069 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | { |
Zhang Rui | b62b8ef | 2008-04-29 02:35:56 -0400 | [diff] [blame] | 1071 | if (cpu_online(pr->id)) |
| 1072 | cpu_down(pr->id); |
| 1073 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | arch_unregister_cpu(pr->id); |
| 1075 | acpi_unmap_lsapic(pr->id); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1076 | return (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | } |
| 1078 | #else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1079 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | { |
| 1081 | return AE_ERROR; |
| 1082 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1083 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1085 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | } |
| 1087 | #endif |
| 1088 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | static |
| 1090 | void acpi_processor_install_hotplug_notify(void) |
| 1091 | { |
| 1092 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 1093 | int action = INSTALL_NOTIFY_HANDLER; |
| 1094 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1095 | ACPI_ROOT_OBJECT, |
| 1096 | ACPI_UINT32_MAX, |
| 1097 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 1099 | register_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | } |
| 1101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | static |
| 1103 | void acpi_processor_uninstall_hotplug_notify(void) |
| 1104 | { |
| 1105 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 1106 | int action = UNINSTALL_NOTIFY_HANDLER; |
| 1107 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1108 | ACPI_ROOT_OBJECT, |
| 1109 | ACPI_UINT32_MAX, |
| 1110 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 1112 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | /* |
| 1116 | * We keep the driver loaded even when ACPI is not running. |
| 1117 | * This is needed for the powernow-k8 driver, that works even without |
| 1118 | * ACPI, but needs symbols from this driver |
| 1119 | */ |
| 1120 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1121 | static int __init acpi_processor_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1123 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | memset(&errata, 0, sizeof(errata)); |
| 1126 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 1127 | #ifdef CONFIG_SMP |
| 1128 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, |
| 1129 | (struct acpi_table_header **)&madt))) |
Randy Dunlap | 70c0846 | 2007-02-13 16:11:36 -0800 | [diff] [blame] | 1130 | madt = NULL; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 1131 | #endif |
| 1132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 1134 | if (!acpi_processor_dir) |
Akinobu Mita | 83822fc | 2006-12-19 12:56:10 -0800 | [diff] [blame] | 1135 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | |
Zhao Yakui | 2a2a647 | 2008-06-24 18:02:57 +0800 | [diff] [blame] | 1137 | /* |
| 1138 | * Check whether the system is DMI table. If yes, OSPM |
| 1139 | * should not use mwait for CPU-states. |
| 1140 | */ |
| 1141 | dmi_check_system(processor_idle_dmi_table); |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1142 | result = cpuidle_register_driver(&acpi_idle_driver); |
| 1143 | if (result < 0) |
| 1144 | goto out_proc; |
| 1145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | result = acpi_bus_register_driver(&acpi_processor_driver); |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1147 | if (result < 0) |
| 1148 | goto out_cpuidle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | |
| 1150 | acpi_processor_install_hotplug_notify(); |
| 1151 | |
| 1152 | acpi_thermal_cpufreq_init(); |
| 1153 | |
| 1154 | acpi_processor_ppc_init(); |
| 1155 | |
Zhao Yakui | 1180509 | 2008-01-28 13:53:42 +0800 | [diff] [blame] | 1156 | acpi_processor_throttling_init(); |
| 1157 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1158 | return 0; |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1159 | |
| 1160 | out_cpuidle: |
| 1161 | cpuidle_unregister_driver(&acpi_idle_driver); |
| 1162 | |
| 1163 | out_proc: |
| 1164 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 1165 | |
| 1166 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | } |
| 1168 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1169 | static void __exit acpi_processor_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | acpi_processor_ppc_exit(); |
| 1172 | |
| 1173 | acpi_thermal_cpufreq_exit(); |
| 1174 | |
| 1175 | acpi_processor_uninstall_hotplug_notify(); |
| 1176 | |
| 1177 | acpi_bus_unregister_driver(&acpi_processor_driver); |
| 1178 | |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1179 | cpuidle_unregister_driver(&acpi_idle_driver); |
| 1180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 1182 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1183 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | } |
| 1185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | module_init(acpi_processor_init); |
| 1187 | module_exit(acpi_processor_exit); |
| 1188 | |
| 1189 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); |
| 1190 | |
| 1191 | MODULE_ALIAS("processor"); |