/*
   *  acpi_osl.c - OS-dependent functions ($Revision: 83 $)
   *
   *  Copyright (C) 2000       Andrew Henroid
   *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
   *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>

   *  Copyright (c) 2008 Intel Corporation
   *   Author: Matthew Wilcox <willy@linux.intel.com>

   *
   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   *
   *  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
   *
   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   *
   */

  #include <linux/module.h>
  #include <linux/kernel.h>
  #include <linux/slab.h>
  #include <linux/mm.h>
  #include <linux/pci.h>

  #include <linux/interrupt.h>
  #include <linux/kmod.h>
  #include <linux/delay.h>
  #include <linux/workqueue.h>
  #include <linux/nmi.h>

  #include <linux/acpi.h>

  #include <linux/acpi_io.h>

  #include <linux/efi.h>

  #include <linux/ioport.h>
  #include <linux/list.h>

  #include <linux/jiffies.h>
  #include <linux/semaphore.h>
  
  #include <asm/io.h>
  #include <asm/uaccess.h>
  
  #include <acpi/acpi.h>
  #include <acpi/acpi_bus.h>
  #include <acpi/processor.h>

  #define _COMPONENT		ACPI_OS_SERVICES

  ACPI_MODULE_NAME("osl");

  #define PREFIX		"ACPI: "

  struct acpi_os_dpc {
  	acpi_osd_exec_callback function;
  	void *context;

  	struct work_struct work;

  	int wait;

  };
  
  #ifdef CONFIG_ACPI_CUSTOM_DSDT
  #include CONFIG_ACPI_CUSTOM_DSDT_FILE
  #endif
  
  #ifdef ENABLE_DEBUGGER
  #include <linux/kdb.h>
  
  /* stuff for debugger support */
  int acpi_in_debugger;
  EXPORT_SYMBOL(acpi_in_debugger);
  
  extern char line_buf[80];

  #endif				/*ENABLE_DEBUGGER */

  static acpi_osd_handler acpi_irq_handler;
  static void *acpi_irq_context;
  static struct workqueue_struct *kacpid_wq;

  static struct workqueue_struct *kacpi_notify_wq;

  struct workqueue_struct *kacpi_hotplug_wq;
  EXPORT_SYMBOL(kacpi_hotplug_wq);

  struct acpi_res_list {
  	resource_size_t start;
  	resource_size_t end;
  	acpi_adr_space_type resource_type; /* IO port, System memory, ...*/
  	char name[5];   /* only can have a length of 4 chars, make use of this
  			   one instead of res->name, no need to kalloc then */
  	struct list_head resource_list;

  	int count;

  };
  
  static LIST_HEAD(resource_list_head);
  static DEFINE_SPINLOCK(acpi_res_lock);

  /*
   * This list of permanent mappings is for memory that may be accessed from
   * interrupt context, where we can't do the ioremap().
   */
  struct acpi_ioremap {
  	struct list_head list;
  	void __iomem *virt;
  	acpi_physical_address phys;
  	acpi_size size;

  	unsigned long refcount;

  };
  
  static LIST_HEAD(acpi_ioremaps);

  static DEFINE_MUTEX(acpi_ioremap_lock);

  static void __init acpi_osi_setup_late(void);

  /*

   * The story of _OSI(Linux)

   *

   * From pre-history through Linux-2.6.22,
   * Linux responded TRUE upon a BIOS OSI(Linux) query.

   *

   * Unfortunately, reference BIOS writers got wind of this
   * and put OSI(Linux) in their example code, quickly exposing
   * this string as ill-conceived and opening the door to
   * an un-bounded number of BIOS incompatibilities.

   *

   * For example, OSI(Linux) was used on resume to re-POST a
   * video card on one system, because Linux at that time
   * could not do a speedy restore in its native driver.
   * But then upon gaining quick native restore capability,
   * Linux has no way to tell the BIOS to skip the time-consuming
   * POST -- putting Linux at a permanent performance disadvantage.
   * On another system, the BIOS writer used OSI(Linux)
   * to infer native OS support for IPMI!  On other systems,
   * OSI(Linux) simply got in the way of Linux claiming to
   * be compatible with other operating systems, exposing
   * BIOS issues such as skipped device initialization.

   *

   * So "Linux" turned out to be a really poor chose of
   * OSI string, and from Linux-2.6.23 onward we respond FALSE.

   *
   * BIOS writers should NOT query _OSI(Linux) on future systems.

   * Linux will complain on the console when it sees it, and return FALSE.
   * To get Linux to return TRUE for your system  will require
   * a kernel source update to add a DMI entry,
   * or boot with "acpi_osi=Linux"

   */

  static struct osi_linux {

  	unsigned int	enable:1;
  	unsigned int	dmi:1;
  	unsigned int	cmdline:1;

  } osi_linux = {0, 0, 0};

  static u32 acpi_osi_handler(acpi_string interface, u32 supported)
  {
  	if (!strcmp("Linux", interface)) {

  		printk_once(KERN_NOTICE FW_BUG PREFIX

  			"BIOS _OSI(Linux) query %s%s
  ",
  			osi_linux.enable ? "honored" : "ignored",
  			osi_linux.cmdline ? " via cmdline" :
  			osi_linux.dmi ? " via DMI" : "");
  	}
  
  	return supported;
  }

  static void __init acpi_request_region (struct acpi_generic_address *addr,
  	unsigned int length, char *desc)
  {

  	if (!addr->address || !length)
  		return;

  	/* Resources are never freed */

  	if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)

  		request_region(addr->address, length, desc);

  	else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)

  		request_mem_region(addr->address, length, desc);

  }
  
  static int __init acpi_reserve_resources(void)
  {

  	acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,

  		"ACPI PM1a_EVT_BLK");

  	acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,

  		"ACPI PM1b_EVT_BLK");

  	acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,

  		"ACPI PM1a_CNT_BLK");

  	acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,

  		"ACPI PM1b_CNT_BLK");

  	if (acpi_gbl_FADT.pm_timer_length == 4)
  		acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");

  	acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,

  		"ACPI PM2_CNT_BLK");
  
  	/* Length of GPE blocks must be a non-negative multiple of 2 */

  	if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
  		acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
  			       acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");

  	if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
  		acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
  			       acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");

  
  	return 0;
  }
  device_initcall(acpi_reserve_resources);

  void acpi_os_printf(const char *fmt, ...)

  {
  	va_list args;
  	va_start(args, fmt);
  	acpi_os_vprintf(fmt, args);
  	va_end(args);
  }

  void acpi_os_vprintf(const char *fmt, va_list args)

  {
  	static char buffer[512];

  	vsprintf(buffer, fmt, args);
  
  #ifdef ENABLE_DEBUGGER
  	if (acpi_in_debugger) {
  		kdb_printf("%s", buffer);
  	} else {

  		printk(KERN_CONT "%s", buffer);

  	}
  #else

  	printk(KERN_CONT "%s", buffer);

  #endif
  }

  #ifdef CONFIG_KEXEC
  static unsigned long acpi_rsdp;
  static int __init setup_acpi_rsdp(char *arg)
  {
  	acpi_rsdp = simple_strtoul(arg, NULL, 16);
  	return 0;
  }
  early_param("acpi_rsdp", setup_acpi_rsdp);
  #endif

  acpi_physical_address __init acpi_os_get_root_pointer(void)

  {

  #ifdef CONFIG_KEXEC
  	if (acpi_rsdp)
  		return acpi_rsdp;
  #endif

  	if (efi_enabled) {

  		if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)

  			return efi.acpi20;

  		else if (efi.acpi != EFI_INVALID_TABLE_ADDR)

  			return efi.acpi;

  		else {

  			printk(KERN_ERR PREFIX
  			       "System description tables not found
  ");

  			return 0;

  		}

  	} else {
  		acpi_physical_address pa = 0;
  
  		acpi_find_root_pointer(&pa);
  		return pa;
  	}

  }

  /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */

  static struct acpi_ioremap *
  acpi_map_lookup(acpi_physical_address phys, acpi_size size)

  {
  	struct acpi_ioremap *map;

  	list_for_each_entry_rcu(map, &acpi_ioremaps, list)

  		if (map->phys <= phys &&
  		    phys + size <= map->phys + map->size)

  			return map;
  
  	return NULL;
  }
  
  /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
  static void __iomem *
  acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
  {
  	struct acpi_ioremap *map;
  
  	map = acpi_map_lookup(phys, size);
  	if (map)
  		return map->virt + (phys - map->phys);

  
  	return NULL;
  }

  void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
  {
  	struct acpi_ioremap *map;
  	void __iomem *virt = NULL;
  
  	mutex_lock(&acpi_ioremap_lock);
  	map = acpi_map_lookup(phys, size);
  	if (map) {
  		virt = map->virt + (phys - map->phys);
  		map->refcount++;
  	}
  	mutex_unlock(&acpi_ioremap_lock);
  	return virt;
  }
  EXPORT_SYMBOL_GPL(acpi_os_get_iomem);

  /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */

  static struct acpi_ioremap *
  acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
  {
  	struct acpi_ioremap *map;

  	list_for_each_entry_rcu(map, &acpi_ioremaps, list)

  		if (map->virt <= virt &&
  		    virt + size <= map->virt + map->size)

  			return map;
  
  	return NULL;
  }

  void __iomem *__init_refok
  acpi_os_map_memory(acpi_physical_address phys, acpi_size size)

  {

  	struct acpi_ioremap *map;

  	void __iomem *virt;

  	acpi_physical_address pg_off;
  	acpi_size pg_sz;

  	if (phys > ULONG_MAX) {
  		printk(KERN_ERR PREFIX "Cannot map memory that high
  ");

  		return NULL;

  	}

  
  	if (!acpi_gbl_permanent_mmap)

  		return __acpi_map_table((unsigned long)phys, size);

  	mutex_lock(&acpi_ioremap_lock);
  	/* Check if there's a suitable mapping already. */
  	map = acpi_map_lookup(phys, size);
  	if (map) {

  		map->refcount++;

  		goto out;
  	}

  	map = kzalloc(sizeof(*map), GFP_KERNEL);

  	if (!map) {
  		mutex_unlock(&acpi_ioremap_lock);

  		return NULL;

  	}

  	pg_off = round_down(phys, PAGE_SIZE);
  	pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;

  	virt = acpi_os_ioremap(pg_off, pg_sz);

  	if (!virt) {

  		mutex_unlock(&acpi_ioremap_lock);

  		kfree(map);
  		return NULL;
  	}
  
  	INIT_LIST_HEAD(&map->list);
  	map->virt = virt;

  	map->phys = pg_off;
  	map->size = pg_sz;

  	map->refcount = 1;

  	list_add_tail_rcu(&map->list, &acpi_ioremaps);

   out:
  	mutex_unlock(&acpi_ioremap_lock);

  	return map->virt + (phys - map->phys);

  }

  EXPORT_SYMBOL_GPL(acpi_os_map_memory);

  static void acpi_os_drop_map_ref(struct acpi_ioremap *map)

  {

  	if (!--map->refcount)
  		list_del_rcu(&map->list);

  }

  static void acpi_os_map_cleanup(struct acpi_ioremap *map)

  {

  	if (!map->refcount) {
  		synchronize_rcu();
  		iounmap(map->virt);
  		kfree(map);
  	}

  }

  void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size)

  {

  	struct acpi_ioremap *map;

  
  	if (!acpi_gbl_permanent_mmap) {

  		__acpi_unmap_table(virt, size);

  		return;
  	}

  	mutex_lock(&acpi_ioremap_lock);

  	map = acpi_map_lookup_virt(virt, size);
  	if (!map) {

  		mutex_unlock(&acpi_ioremap_lock);

  		WARN(true, PREFIX "%s: bad address %p
  ", __func__, virt);

  		return;
  	}

  	acpi_os_drop_map_ref(map);

  	mutex_unlock(&acpi_ioremap_lock);

  	acpi_os_map_cleanup(map);

  }

  EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);

  void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)

  {
  	if (!acpi_gbl_permanent_mmap)
  		__acpi_unmap_table(virt, size);
  }

  static int acpi_os_map_generic_address(struct acpi_generic_address *addr)

  {
  	void __iomem *virt;
  
  	if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
  		return 0;
  
  	if (!addr->address || !addr->bit_width)
  		return -EINVAL;
  
  	virt = acpi_os_map_memory(addr->address, addr->bit_width / 8);
  	if (!virt)
  		return -EIO;
  
  	return 0;
  }

  static void acpi_os_unmap_generic_address(struct acpi_generic_address *addr)

  {

  	struct acpi_ioremap *map;

  
  	if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
  		return;
  
  	if (!addr->address || !addr->bit_width)
  		return;

  	mutex_lock(&acpi_ioremap_lock);

  	map = acpi_map_lookup(addr->address, addr->bit_width / 8);
  	if (!map) {
  		mutex_unlock(&acpi_ioremap_lock);
  		return;
  	}

  	acpi_os_drop_map_ref(map);

  	mutex_unlock(&acpi_ioremap_lock);

  	acpi_os_map_cleanup(map);

  }

  #ifdef ACPI_FUTURE_USAGE
  acpi_status

  acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)

  {

  	if (!phys || !virt)

  		return AE_BAD_PARAMETER;
  
  	*phys = virt_to_phys(virt);
  
  	return AE_OK;
  }
  #endif
  
  #define ACPI_MAX_OVERRIDE_LEN 100
  
  static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
  
  acpi_status

  acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
  			    acpi_string * new_val)

  {
  	if (!init_val || !new_val)
  		return AE_BAD_PARAMETER;
  
  	*new_val = NULL;

  	if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {

  		printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'
  ",

  		       acpi_os_name);

  		*new_val = acpi_os_name;
  	}
  
  	return AE_OK;
  }
  
  acpi_status

  acpi_os_table_override(struct acpi_table_header * existing_table,
  		       struct acpi_table_header ** new_table)

  {
  	if (!existing_table || !new_table)
  		return AE_BAD_PARAMETER;

  	*new_table = NULL;

  #ifdef CONFIG_ACPI_CUSTOM_DSDT
  	if (strncmp(existing_table->signature, "DSDT", 4) == 0)

  		*new_table = (struct acpi_table_header *)AmlCode;

  #endif

  	if (*new_table != NULL) {
  		printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
  			   "this is unsafe: tainting kernel
  ",
  		       existing_table->signature,
  		       existing_table->oem_table_id);
  		add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
  	}

  	return AE_OK;
  }

  static irqreturn_t acpi_irq(int irq, void *dev_id)

  {

  	u32 handled;
  
  	handled = (*acpi_irq_handler) (acpi_irq_context);
  
  	if (handled) {
  		acpi_irq_handled++;
  		return IRQ_HANDLED;

  	} else {
  		acpi_irq_not_handled++;

  		return IRQ_NONE;

  	}

  }
  
  acpi_status

  acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
  				  void *context)

  {
  	unsigned int irq;

  	acpi_irq_stats_init();

  	/*

  	 * ACPI interrupts different from the SCI in our copy of the FADT are
  	 * not supported.

  	 */

  	if (gsi != acpi_gbl_FADT.sci_interrupt)
  		return AE_BAD_PARAMETER;
  
  	if (acpi_irq_handler)
  		return AE_ALREADY_ACQUIRED;

  	if (acpi_gsi_to_irq(gsi, &irq) < 0) {
  		printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered
  ",
  		       gsi);
  		return AE_OK;
  	}
  
  	acpi_irq_handler = handler;
  	acpi_irq_context = context;

  	if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {

  		printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed
  ", irq);

  		acpi_irq_handler = NULL;

  		return AE_NOT_ACQUIRED;
  	}

  
  	return AE_OK;
  }

  acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)

  {

  	if (irq != acpi_gbl_FADT.sci_interrupt)
  		return AE_BAD_PARAMETER;
  
  	free_irq(irq, acpi_irq);
  	acpi_irq_handler = NULL;

  
  	return AE_OK;
  }
  
  /*
   * Running in interpreter thread context, safe to sleep
   */

  void acpi_os_sleep(u64 ms)

  {

  	schedule_timeout_interruptible(msecs_to_jiffies(ms));

  }

  void acpi_os_stall(u32 us)

  {
  	while (us) {
  		u32 delay = 1000;
  
  		if (delay > us)
  			delay = us;
  		udelay(delay);
  		touch_nmi_watchdog();
  		us -= delay;
  	}
  }

  /*
   * Support ACPI 3.0 AML Timer operand
   * Returns 64-bit free-running, monotonically increasing timer
   * with 100ns granularity
   */

  u64 acpi_os_get_timer(void)

  {
  	static u64 t;
  
  #ifdef	CONFIG_HPET
  	/* TBD: use HPET if available */
  #endif
  
  #ifdef	CONFIG_X86_PM_TIMER
  	/* TBD: default to PM timer if HPET was not available */
  #endif
  	if (!t)
  		printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD
  ");
  
  	return ++t;
  }

  acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)

  {
  	u32 dummy;
  
  	if (!value)
  		value = &dummy;

  	*value = 0;
  	if (width <= 8) {

  		*(u8 *) value = inb(port);

  	} else if (width <= 16) {

  		*(u16 *) value = inw(port);

  	} else if (width <= 32) {

  		*(u32 *) value = inl(port);

  	} else {

  		BUG();
  	}
  
  	return AE_OK;
  }

  EXPORT_SYMBOL(acpi_os_read_port);

  acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)

  {

  	if (width <= 8) {

  		outb(value, port);

  	} else if (width <= 16) {

  		outw(value, port);

  	} else if (width <= 32) {

  		outl(value, port);

  	} else {

  		BUG();
  	}
  
  	return AE_OK;
  }

  EXPORT_SYMBOL(acpi_os_write_port);
  
  acpi_status

  acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)

  {

  	void __iomem *virt_addr;

  	unsigned int size = width / 8;
  	bool unmap = false;
  	u32 dummy;

  	rcu_read_lock();

  	virt_addr = acpi_map_vaddr_lookup(phys_addr, size);

  	if (!virt_addr) {

  		rcu_read_unlock();

  		virt_addr = acpi_os_ioremap(phys_addr, size);

  		if (!virt_addr)
  			return AE_BAD_ADDRESS;
  		unmap = true;

  	}

  	if (!value)
  		value = &dummy;
  
  	switch (width) {
  	case 8:

  		*(u8 *) value = readb(virt_addr);

  		break;
  	case 16:

  		*(u16 *) value = readw(virt_addr);

  		break;
  	case 32:

  		*(u32 *) value = readl(virt_addr);

  		break;
  	default:
  		BUG();
  	}

  	if (unmap)
  		iounmap(virt_addr);

  	else
  		rcu_read_unlock();

  
  	return AE_OK;
  }
  
  acpi_status

  acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)

  {

  	void __iomem *virt_addr;

  	unsigned int size = width / 8;
  	bool unmap = false;

  	rcu_read_lock();

  	virt_addr = acpi_map_vaddr_lookup(phys_addr, size);

  	if (!virt_addr) {

  		rcu_read_unlock();

  		virt_addr = acpi_os_ioremap(phys_addr, size);

  		if (!virt_addr)
  			return AE_BAD_ADDRESS;
  		unmap = true;

  	}

  
  	switch (width) {
  	case 8:
  		writeb(value, virt_addr);
  		break;
  	case 16:
  		writew(value, virt_addr);
  		break;
  	case 32:
  		writel(value, virt_addr);
  		break;
  	default:
  		BUG();
  	}

  	if (unmap)
  		iounmap(virt_addr);

  	else
  		rcu_read_unlock();

  
  	return AE_OK;
  }

  acpi_status

  acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,

  			       u64 *value, u32 width)

  {
  	int result, size;

  	u32 value32;

  
  	if (!value)
  		return AE_BAD_PARAMETER;
  
  	switch (width) {
  	case 8:
  		size = 1;
  		break;
  	case 16:
  		size = 2;
  		break;
  	case 32:
  		size = 4;
  		break;
  	default:
  		return AE_ERROR;
  	}

  	result = raw_pci_read(pci_id->segment, pci_id->bus,
  				PCI_DEVFN(pci_id->device, pci_id->function),

  				reg, size, &value32);
  	*value = value32;

  
  	return (result ? AE_ERROR : AE_OK);
  }

  acpi_status

  acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,

  				u64 value, u32 width)

  {
  	int result, size;
  
  	switch (width) {
  	case 8:
  		size = 1;
  		break;
  	case 16:
  		size = 2;
  		break;
  	case 32:
  		size = 4;
  		break;
  	default:
  		return AE_ERROR;
  	}

  	result = raw_pci_write(pci_id->segment, pci_id->bus,
  				PCI_DEVFN(pci_id->device, pci_id->function),
  				reg, size, value);

  
  	return (result ? AE_ERROR : AE_OK);
  }

  static void acpi_os_execute_deferred(struct work_struct *work)

  {

  	struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);

  	if (dpc->wait)
  		acpi_os_wait_events_complete(NULL);

  
  	dpc->function(dpc->context);
  	kfree(dpc);

  }

  /*******************************************************************************
   *
   * FUNCTION:    acpi_os_execute
   *
   * PARAMETERS:  Type               - Type of the callback
   *              Function           - Function to be executed
   *              Context            - Function parameters
   *
   * RETURN:      Status
   *
   * DESCRIPTION: Depending on type, either queues function for deferred execution or
   *              immediately executes function on a separate thread.
   *
   ******************************************************************************/

  static acpi_status __acpi_os_execute(acpi_execute_type type,
  	acpi_osd_exec_callback function, void *context, int hp)

  {

  	acpi_status status = AE_OK;
  	struct acpi_os_dpc *dpc;

  	struct workqueue_struct *queue;

  	int ret;

  	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
  			  "Scheduling function [%p(%p)] for deferred execution.
  ",
  			  function, context));

  	/*
  	 * Allocate/initialize DPC structure.  Note that this memory will be

  	 * freed by the callee.  The kernel handles the work_struct list  in a

  	 * way that allows us to also free its memory inside the callee.
  	 * Because we may want to schedule several tasks with different
  	 * parameters we can't use the approach some kernel code uses of

  	 * having a static work_struct.

  	 */

  	dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);

  	if (!dpc)

  		return AE_NO_MEMORY;

  	dpc->function = function;
  	dpc->context = context;

  	/*
  	 * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq
  	 * because the hotplug code may call driver .remove() functions,
  	 * which invoke flush_scheduled_work/acpi_os_wait_events_complete
  	 * to flush these workqueues.
  	 */
  	queue = hp ? kacpi_hotplug_wq :
  		(type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq);

  	dpc->wait = hp ? 1 : 0;

  
  	if (queue == kacpi_hotplug_wq)
  		INIT_WORK(&dpc->work, acpi_os_execute_deferred);
  	else if (queue == kacpi_notify_wq)
  		INIT_WORK(&dpc->work, acpi_os_execute_deferred);
  	else
  		INIT_WORK(&dpc->work, acpi_os_execute_deferred);

  	/*
  	 * On some machines, a software-initiated SMI causes corruption unless
  	 * the SMI runs on CPU 0.  An SMI can be initiated by any AML, but
  	 * typically it's done in GPE-related methods that are run via
  	 * workqueues, so we can avoid the known corruption cases by always
  	 * queueing on CPU 0.
  	 */
  	ret = queue_work_on(0, queue, &dpc->work);

  
  	if (!ret) {

  		printk(KERN_ERR PREFIX
  			  "Call to queue_work() failed.
  ");

  		status = AE_ERROR;
  		kfree(dpc);

  	}

  	return status;

  }

  acpi_status acpi_os_execute(acpi_execute_type type,
  			    acpi_osd_exec_callback function, void *context)
  {
  	return __acpi_os_execute(type, function, context, 0);
  }

  EXPORT_SYMBOL(acpi_os_execute);

  acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function,
  	void *context)
  {
  	return __acpi_os_execute(0, function, context, 1);
  }

  void acpi_os_wait_events_complete(void *context)

  {
  	flush_workqueue(kacpid_wq);

  	flush_workqueue(kacpi_notify_wq);

  }

  EXPORT_SYMBOL(acpi_os_wait_events_complete);

  acpi_status

  acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)

  {

  	struct semaphore *sem = NULL;

  	sem = acpi_os_allocate(sizeof(struct semaphore));
  	if (!sem)

  		return AE_NO_MEMORY;

  	memset(sem, 0, sizeof(struct semaphore));
  
  	sema_init(sem, initial_units);

  	*handle = (acpi_handle *) sem;

  	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].
  ",
  			  *handle, initial_units));

  	return AE_OK;

  }

  /*
   * TODO: A better way to delete semaphores?  Linux doesn't have a
   * 'delete_semaphore()' function -- may result in an invalid
   * pointer dereference for non-synchronized consumers.	Should
   * we at least check for blocked threads and signal/cancel them?
   */

  acpi_status acpi_os_delete_semaphore(acpi_handle handle)

  {

  	struct semaphore *sem = (struct semaphore *)handle;

  	if (!sem)

  		return AE_BAD_PARAMETER;

  	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].
  ", handle));

  	BUG_ON(!list_empty(&sem->wait_list));

  	kfree(sem);

  	sem = NULL;

  	return AE_OK;

  }

  /*

   * TODO: Support for units > 1?
   */

  acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)

  {

  	acpi_status status = AE_OK;
  	struct semaphore *sem = (struct semaphore *)handle;

  	long jiffies;

  	int ret = 0;

  	if (!sem || (units < 1))

  		return AE_BAD_PARAMETER;

  
  	if (units > 1)

  		return AE_SUPPORT;

  	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]
  ",
  			  handle, units, timeout));

  	if (timeout == ACPI_WAIT_FOREVER)
  		jiffies = MAX_SCHEDULE_TIMEOUT;
  	else
  		jiffies = msecs_to_jiffies(timeout);
  	
  	ret = down_timeout(sem, jiffies);
  	if (ret)
  		status = AE_TIME;

  
  	if (ACPI_FAILURE(status)) {

  		ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,

  				  "Failed to acquire semaphore[%p|%d|%d], %s",

  				  handle, units, timeout,
  				  acpi_format_exception(status)));
  	} else {
  		ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,

  				  "Acquired semaphore[%p|%d|%d]", handle,

  				  units, timeout));

  	}

  	return status;

  }

  /*
   * TODO: Support for units > 1?
   */

  acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)

  {

  	struct semaphore *sem = (struct semaphore *)handle;

  	if (!sem || (units < 1))

  		return AE_BAD_PARAMETER;

  
  	if (units > 1)

  		return AE_SUPPORT;

  	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]
  ", handle,
  			  units));

  
  	up(sem);

  	return AE_OK;

  }

  #ifdef ACPI_FUTURE_USAGE

  u32 acpi_os_get_line(char *buffer)

  {
  
  #ifdef ENABLE_DEBUGGER
  	if (acpi_in_debugger) {
  		u32 chars;
  
  		kdb_read(buffer, sizeof(line_buf));
  
  		/* remove the CR kdb includes */
  		chars = strlen(buffer) - 1;
  		buffer[chars] = '\0';
  	}
  #endif
  
  	return 0;
  }

  #endif				/*  ACPI_FUTURE_USAGE  */

  acpi_status acpi_os_signal(u32 function, void *info)

  {

  	switch (function) {

  	case ACPI_SIGNAL_FATAL:
  		printk(KERN_ERR PREFIX "Fatal opcode executed
  ");
  		break;
  	case ACPI_SIGNAL_BREAKPOINT:
  		/*
  		 * AML Breakpoint
  		 * ACPI spec. says to treat it as a NOP unless
  		 * you are debugging.  So if/when we integrate
  		 * AML debugger into the kernel debugger its
  		 * hook will go here.  But until then it is
  		 * not useful to print anything on breakpoints.
  		 */
  		break;
  	default:
  		break;
  	}
  
  	return AE_OK;
  }

  static int __init acpi_os_name_setup(char *str)

  {
  	char *p = acpi_os_name;

  	int count = ACPI_MAX_OVERRIDE_LEN - 1;

  
  	if (!str || !*str)
  		return 0;
  
  	for (; count-- && str && *str; str++) {
  		if (isalnum(*str) || *str == ' ' || *str == ':')
  			*p++ = *str;
  		else if (*str == '\'' || *str == '"')
  			continue;
  		else
  			break;
  	}
  	*p = 0;
  
  	return 1;

  }
  
  __setup("acpi_os_name=", acpi_os_name_setup);

  #define	OSI_STRING_LENGTH_MAX 64	/* arbitrary */
  #define	OSI_STRING_ENTRIES_MAX 16	/* arbitrary */
  
  struct osi_setup_entry {
  	char string[OSI_STRING_LENGTH_MAX];
  	bool enable;
  };

  static struct osi_setup_entry __initdata
  		osi_setup_entries[OSI_STRING_ENTRIES_MAX] = {
  	{"Module Device", true},
  	{"Processor Device", true},
  	{"3.0 _SCP Extensions", true},
  	{"Processor Aggregator Device", true},
  };

  void __init acpi_osi_setup(char *str)
  {

  	struct osi_setup_entry *osi;
  	bool enable = true;
  	int i;

  	if (!acpi_gbl_create_osi_method)
  		return;
  
  	if (str == NULL || *str == '\0') {
  		printk(KERN_INFO PREFIX "_OSI method disabled
  ");
  		acpi_gbl_create_osi_method = FALSE;

  		return;
  	}
  
  	if (*str == '!') {
  		str++;
  		enable = false;
  	}
  
  	for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
  		osi = &osi_setup_entries[i];
  		if (!strcmp(osi->string, str)) {
  			osi->enable = enable;
  			break;
  		} else if (osi->string[0] == '\0') {
  			osi->enable = enable;
  			strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
  			break;
  		}
  	}

  }

  static void __init set_osi_linux(unsigned int enable)
  {

  	if (osi_linux.enable != enable)

  		osi_linux.enable = enable;

  
  	if (osi_linux.enable)
  		acpi_osi_setup("Linux");
  	else
  		acpi_osi_setup("!Linux");

  	return;
  }
  
  static void __init acpi_cmdline_osi_linux(unsigned int enable)
  {

  	osi_linux.cmdline = 1;	/* cmdline set the default and override DMI */
  	osi_linux.dmi = 0;

  	set_osi_linux(enable);
  
  	return;
  }
  
  void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
  {

  	printk(KERN_NOTICE PREFIX "DMI detected: %s
  ", d->ident);
  
  	if (enable == -1)
  		return;

  	osi_linux.dmi = 1;	/* DMI knows that this box asks OSI(Linux) */

  	set_osi_linux(enable);

  	return;
  }

  /*

   * Modify the list of "OS Interfaces" reported to BIOS via _OSI
   *

   * empty string disables _OSI

   * string starting with '!' disables that string
   * otherwise string is added to list, augmenting built-in strings

   */

  static void __init acpi_osi_setup_late(void)

  {

  	struct osi_setup_entry *osi;
  	char *str;
  	int i;

  	acpi_status status;

  	for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
  		osi = &osi_setup_entries[i];
  		str = osi->string;

  		if (*str == '\0')
  			break;
  		if (osi->enable) {
  			status = acpi_install_interface(str);

  			if (ACPI_SUCCESS(status))
  				printk(KERN_INFO PREFIX "Added _OSI(%s)
  ", str);
  		} else {
  			status = acpi_remove_interface(str);

  			if (ACPI_SUCCESS(status))
  				printk(KERN_INFO PREFIX "Deleted _OSI(%s)
  ", str);
  		}

  	}
  }

  static int __init osi_setup(char *str)

  {

  	if (str && !strcmp("Linux", str))
  		acpi_cmdline_osi_linux(1);
  	else if (str && !strcmp("!Linux", str))
  		acpi_cmdline_osi_linux(0);
  	else
  		acpi_osi_setup(str);

  
  	return 1;
  }

  __setup("acpi_osi=", osi_setup);

  
  /* enable serialization to combat AE_ALREADY_EXISTS errors */

  static int __init acpi_serialize_setup(char *str)

  {
  	printk(KERN_INFO PREFIX "serialize enabled
  ");
  
  	acpi_gbl_all_methods_serialized = TRUE;
  
  	return 1;
  }
  
  __setup("acpi_serialize", acpi_serialize_setup);

  /* Check of resource interference between native drivers and ACPI
   * OperationRegions (SystemIO and System Memory only).
   * IO ports and memory declared in ACPI might be used by the ACPI subsystem
   * in arbitrary AML code and can interfere with legacy drivers.
   * acpi_enforce_resources= can be set to:
   *

   *   - strict (default) (2)

   *     -> further driver trying to access the resources will not load

   *   - lax              (1)

   *     -> further driver trying to access the resources will load, but you
   *     get a system message that something might go wrong...
   *
   *   - no               (0)
   *     -> ACPI Operation Region resources will not be registered
   *
   */
  #define ENFORCE_RESOURCES_STRICT 2
  #define ENFORCE_RESOURCES_LAX    1
  #define ENFORCE_RESOURCES_NO     0

  static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;

  
  static int __init acpi_enforce_resources_setup(char *str)
  {
  	if (str == NULL || *str == '\0')
  		return 0;
  
  	if (!strcmp("strict", str))
  		acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
  	else if (!strcmp("lax", str))
  		acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
  	else if (!strcmp("no", str))
  		acpi_enforce_resources = ENFORCE_RESOURCES_NO;
  
  	return 1;
  }
  
  __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
  
  /* Check for resource conflicts between ACPI OperationRegions and native
   * drivers */

  int acpi_check_resource_conflict(const struct resource *res)

  {
  	struct acpi_res_list *res_list_elem;

  	int ioport = 0, clash = 0;

  
  	if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
  		return 0;
  	if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
  		return 0;
  
  	ioport = res->flags & IORESOURCE_IO;
  
  	spin_lock(&acpi_res_lock);
  	list_for_each_entry(res_list_elem, &resource_list_head,
  			    resource_list) {
  		if (ioport && (res_list_elem->resource_type
  			       != ACPI_ADR_SPACE_SYSTEM_IO))
  			continue;
  		if (!ioport && (res_list_elem->resource_type
  				!= ACPI_ADR_SPACE_SYSTEM_MEMORY))
  			continue;
  
  		if (res->end < res_list_elem->start
  		    || res_list_elem->end < res->start)
  			continue;
  		clash = 1;
  		break;
  	}
  	spin_unlock(&acpi_res_lock);
  
  	if (clash) {
  		if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {

  			printk(KERN_WARNING "ACPI: resource %s %pR"

  			       " conflicts with ACPI region %s "
  			       "[%s 0x%zx-0x%zx]
  ",

  			       res->name, res, res_list_elem->name,

  			       (res_list_elem->resource_type ==
  				ACPI_ADR_SPACE_SYSTEM_IO) ? "io" : "mem",
  			       (size_t) res_list_elem->start,
  			       (size_t) res_list_elem->end);

  			if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
  				printk(KERN_NOTICE "ACPI: This conflict may"
  				       " cause random problems and system"
  				       " instability
  ");
  			printk(KERN_INFO "ACPI: If an ACPI driver is available"
  			       " for this device, you should use it instead of"
  			       " the native driver
  ");

  		}
  		if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
  			return -EBUSY;
  	}
  	return 0;
  }

  EXPORT_SYMBOL(acpi_check_resource_conflict);

  
  int acpi_check_region(resource_size_t start, resource_size_t n,
  		      const char *name)
  {
  	struct resource res = {
  		.start = start,
  		.end   = start + n - 1,
  		.name  = name,
  		.flags = IORESOURCE_IO,
  	};
  
  	return acpi_check_resource_conflict(&res);
  }
  EXPORT_SYMBOL(acpi_check_region);

  /*

   * Let drivers know whether the resource checks are effective
   */
  int acpi_resources_are_enforced(void)
  {
  	return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
  }
  EXPORT_SYMBOL(acpi_resources_are_enforced);
  
  /*

   * Deallocate the memory for a spinlock.
   */
  void acpi_os_delete_lock(acpi_spinlock handle)
  {
  	ACPI_FREE(handle);
  }
  
  /*

   * Acquire a spinlock.
   *
   * handle is a pointer to the spinlock_t.

   */

  acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)

  {

  	acpi_cpu_flags flags;

  	spin_lock_irqsave(lockp, flags);

  	return flags;
  }
  
  /*
   * Release a spinlock. See above.
   */

  void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)

  {

  	spin_unlock_irqrestore(lockp, flags);

  }

  #ifndef ACPI_USE_LOCAL_CACHE
  
  /*******************************************************************************
   *
   * FUNCTION:    acpi_os_create_cache
   *

   * PARAMETERS:  name      - Ascii name for the cache
   *              size      - Size of each cached object
   *              depth     - Maximum depth of the cache (in objects) <ignored>
   *              cache     - Where the new cache object is returned

   *

   * RETURN:      status

   *
   * DESCRIPTION: Create a cache object
   *
   ******************************************************************************/
  
  acpi_status

  acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)

  {

  	*cache = kmem_cache_create(name, size, 0, 0, NULL);

  	if (*cache == NULL)

  		return AE_ERROR;
  	else
  		return AE_OK;

  }
  
  /*******************************************************************************
   *
   * FUNCTION:    acpi_os_purge_cache
   *
   * PARAMETERS:  Cache           - Handle to cache object
   *
   * RETURN:      Status
   *
   * DESCRIPTION: Free all objects within the requested cache.
   *
   ******************************************************************************/

  acpi_status acpi_os_purge_cache(acpi_cache_t * cache)

  {

  	kmem_cache_shrink(cache);

  	return (AE_OK);

  }
  
  /*******************************************************************************
   *
   * FUNCTION:    acpi_os_delete_cache
   *
   * PARAMETERS:  Cache           - Handle to cache object
   *
   * RETURN:      Status
   *
   * DESCRIPTION: Free all objects within the requested cache and delete the
   *              cache object.
   *
   ******************************************************************************/

  acpi_status acpi_os_delete_cache(acpi_cache_t * cache)

  {

  	kmem_cache_destroy(cache);

  	return (AE_OK);

  }
  
  /*******************************************************************************
   *
   * FUNCTION:    acpi_os_release_object
   *
   * PARAMETERS:  Cache       - Handle to cache object
   *              Object      - The object to be released
   *
   * RETURN:      None
   *
   * DESCRIPTION: Release an object to the specified cache.  If cache is full,
   *              the object is deleted.
   *
   ******************************************************************************/

  acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)

  {

  	kmem_cache_free(cache, object);
  	return (AE_OK);

  }

  static inline int acpi_res_list_add(struct acpi_res_list *res)
  {
  	struct acpi_res_list *res_list_elem;
  
  	list_for_each_entry(res_list_elem, &resource_list_head,
  			    resource_list) {
  
  		if (res->resource_type == res_list_elem->resource_type &&
  		    res->start == res_list_elem->start &&
  		    res->end == res_list_elem->end) {
  
  			/*
  			 * The Region(addr,len) already exist in the list,
  			 * just increase the count
  			 */
  
  			res_list_elem->count++;
  			return 0;
  		}
  	}
  
  	res->count = 1;
  	list_add(&res->resource_list, &resource_list_head);
  	return 1;
  }
  
  static inline void acpi_res_list_del(struct acpi_res_list *res)
  {
  	struct acpi_res_list *res_list_elem;
  
  	list_for_each_entry(res_list_elem, &resource_list_head,
  			    resource_list) {
  
  		if (res->resource_type == res_list_elem->resource_type &&
  		    res->start == res_list_elem->start &&
  		    res->end == res_list_elem->end) {
  
  			/*
  			 * If the res count is decreased to 0,
  			 * remove and free it
  			 */
  
  			if (--res_list_elem->count == 0) {
  				list_del(&res_list_elem->resource_list);
  				kfree(res_list_elem);
  			}
  			return;
  		}
  	}
  }
  
  acpi_status
  acpi_os_invalidate_address(
      u8                   space_id,
      acpi_physical_address   address,
      acpi_size               length)
  {
  	struct acpi_res_list res;
  
  	switch (space_id) {
  	case ACPI_ADR_SPACE_SYSTEM_IO:
  	case ACPI_ADR_SPACE_SYSTEM_MEMORY:

  		/* Only interference checks against SystemIO and SystemMemory

  		   are needed */
  		res.start = address;
  		res.end = address + length - 1;
  		res.resource_type = space_id;
  		spin_lock(&acpi_res_lock);
  		acpi_res_list_del(&res);
  		spin_unlock(&acpi_res_lock);
  		break;
  	case ACPI_ADR_SPACE_PCI_CONFIG:
  	case ACPI_ADR_SPACE_EC:
  	case ACPI_ADR_SPACE_SMBUS:
  	case ACPI_ADR_SPACE_CMOS:
  	case ACPI_ADR_SPACE_PCI_BAR_TARGET:
  	case ACPI_ADR_SPACE_DATA_TABLE:
  	case ACPI_ADR_SPACE_FIXED_HARDWARE:
  		break;
  	}
  	return AE_OK;
  }

  /******************************************************************************
   *
   * FUNCTION:    acpi_os_validate_address
   *
   * PARAMETERS:  space_id             - ACPI space ID
   *              address             - Physical address
   *              length              - Address length
   *
   * RETURN:      AE_OK if address/length is valid for the space_id. Otherwise,
   *              should return AE_AML_ILLEGAL_ADDRESS.
   *
   * DESCRIPTION: Validate a system address via the host OS. Used to validate
   *              the addresses accessed by AML operation regions.
   *
   *****************************************************************************/
  
  acpi_status
  acpi_os_validate_address (
      u8                   space_id,
      acpi_physical_address   address,

      acpi_size               length,
      char *name)

  {

  	struct acpi_res_list *res;

  	int added;

  	if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
  		return AE_OK;

  	switch (space_id) {
  	case ACPI_ADR_SPACE_SYSTEM_IO:
  	case ACPI_ADR_SPACE_SYSTEM_MEMORY:

  		/* Only interference checks against SystemIO and SystemMemory

  		   are needed */
  		res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
  		if (!res)
  			return AE_OK;
  		/* ACPI names are fixed to 4 bytes, still better use strlcpy */
  		strlcpy(res->name, name, 5);
  		res->start = address;
  		res->end = address + length - 1;
  		res->resource_type = space_id;
  		spin_lock(&acpi_res_lock);

  		added = acpi_res_list_add(res);

  		spin_unlock(&acpi_res_lock);

  		pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, "
  			 "name: %s
  ", added ? "Added" : "Already exist",
  			 (space_id == ACPI_ADR_SPACE_SYSTEM_IO)

  			 ? "SystemIO" : "System Memory",
  			 (unsigned long long)res->start,
  			 (unsigned long long)res->end,
  			 res->name);

  		if (!added)
  			kfree(res);

  		break;
  	case ACPI_ADR_SPACE_PCI_CONFIG:
  	case ACPI_ADR_SPACE_EC:
  	case ACPI_ADR_SPACE_SMBUS:
  	case ACPI_ADR_SPACE_CMOS:
  	case ACPI_ADR_SPACE_PCI_BAR_TARGET:
  	case ACPI_ADR_SPACE_DATA_TABLE:
  	case ACPI_ADR_SPACE_FIXED_HARDWARE:
  		break;
  	}
  	return AE_OK;

  }

  #endif

  
  acpi_status __init acpi_os_initialize(void)
  {
  	acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
  	acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
  	acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
  	acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
  
  	return AE_OK;
  }

  acpi_status __init acpi_os_initialize1(void)

  {

  	kacpid_wq = alloc_workqueue("kacpid", 0, 1);
  	kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
  	kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1);

  	BUG_ON(!kacpid_wq);
  	BUG_ON(!kacpi_notify_wq);
  	BUG_ON(!kacpi_hotplug_wq);

  	acpi_install_interface_handler(acpi_osi_handler);
  	acpi_osi_setup_late();

  	return AE_OK;
  }
  
  acpi_status acpi_os_terminate(void)
  {
  	if (acpi_irq_handler) {

  		acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,

  						 acpi_irq_handler);
  	}
  
  	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
  	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
  	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
  	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
  
  	destroy_workqueue(kacpid_wq);
  	destroy_workqueue(kacpi_notify_wq);
  	destroy_workqueue(kacpi_hotplug_wq);
  
  	return AE_OK;
  }