osl.c 37.9 KB
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/*
 *  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>
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 *  Copyright (c) 2008 Intel Corporation
 *   Author: Matthew Wilcox <willy@linux.intel.com>
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 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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>
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#include <linux/acpi.h>
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#include <linux/acpi_io.h>
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#include <linux/efi.h>
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#include <linux/ioport.h>
#include <linux/list.h>
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#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>
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#define _COMPONENT		ACPI_OS_SERVICES
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ACPI_MODULE_NAME("osl");
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#define PREFIX		"ACPI: "
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struct acpi_os_dpc {
	acpi_osd_exec_callback function;
	void *context;
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	struct work_struct work;
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	int wait;
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};

#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];
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#endif				/*ENABLE_DEBUGGER */
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static unsigned int acpi_irq_irq;
static acpi_osd_handler acpi_irq_handler;
static void *acpi_irq_context;
static struct workqueue_struct *kacpid_wq;
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static struct workqueue_struct *kacpi_notify_wq;
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static struct workqueue_struct *kacpi_hotplug_wq;
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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;
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	int count;
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};

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

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/*
 * 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;
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	struct kref ref;
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};

static LIST_HEAD(acpi_ioremaps);
static DEFINE_SPINLOCK(acpi_ioremap_lock);

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static void __init acpi_osi_setup_late(void);
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/*
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 * The story of _OSI(Linux)
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 *
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 * From pre-history through Linux-2.6.22,
 * Linux responded TRUE upon a BIOS OSI(Linux) query.
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 *
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 * 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.
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 *
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 * 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.
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 *
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 * So "Linux" turned out to be a really poor chose of
 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
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 *
 * BIOS writers should NOT query _OSI(Linux) on future systems.
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 * 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"
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 */

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static struct osi_linux {
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	unsigned int	enable:1;
	unsigned int	dmi:1;
	unsigned int	cmdline:1;
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} osi_linux = {0, 0, 0};
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static u32 acpi_osi_handler(acpi_string interface, u32 supported)
{
	if (!strcmp("Linux", interface)) {

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		printk(KERN_NOTICE FW_BUG PREFIX
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			"BIOS _OSI(Linux) query %s%s\n",
			osi_linux.enable ? "honored" : "ignored",
			osi_linux.cmdline ? " via cmdline" :
			osi_linux.dmi ? " via DMI" : "");
	}

	return supported;
}

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static void __init acpi_request_region (struct acpi_generic_address *addr,
	unsigned int length, char *desc)
{
	if (!addr->address || !length)
		return;

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	/* Resources are never freed */
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	if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
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		request_region(addr->address, length, desc);
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	else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
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		request_mem_region(addr->address, length, desc);
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}

static int __init acpi_reserve_resources(void)
{
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	acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
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		"ACPI PM1a_EVT_BLK");

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	acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
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		"ACPI PM1b_EVT_BLK");

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	acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
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		"ACPI PM1a_CNT_BLK");

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	acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
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		"ACPI PM1b_CNT_BLK");

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	if (acpi_gbl_FADT.pm_timer_length == 4)
		acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
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	acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
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		"ACPI PM2_CNT_BLK");

	/* Length of GPE blocks must be a non-negative multiple of 2 */

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	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");
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	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");
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	return 0;
}
device_initcall(acpi_reserve_resources);

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void acpi_os_printf(const char *fmt, ...)
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{
	va_list args;
	va_start(args, fmt);
	acpi_os_vprintf(fmt, args);
	va_end(args);
}
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void acpi_os_vprintf(const char *fmt, va_list args)
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{
	static char buffer[512];
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	vsprintf(buffer, fmt, args);

#ifdef ENABLE_DEBUGGER
	if (acpi_in_debugger) {
		kdb_printf("%s", buffer);
	} else {
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		printk(KERN_CONT "%s", buffer);
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	}
#else
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	printk(KERN_CONT "%s", buffer);
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#endif
}

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acpi_physical_address __init acpi_os_get_root_pointer(void)
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{
	if (efi_enabled) {
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		if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
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			return efi.acpi20;
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		else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
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			return efi.acpi;
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		else {
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			printk(KERN_ERR PREFIX
			       "System description tables not found\n");
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			return 0;
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		}
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	} else {
		acpi_physical_address pa = 0;

		acpi_find_root_pointer(&pa);
		return pa;
	}
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}

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/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
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static struct acpi_ioremap *
acpi_map_lookup(acpi_physical_address phys, acpi_size size)
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{
	struct acpi_ioremap *map;

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	list_for_each_entry_rcu(map, &acpi_ioremaps, list)
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		if (map->phys <= phys &&
		    phys + size <= map->phys + map->size)
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			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);
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	return NULL;
}

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/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
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static struct acpi_ioremap *
acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
{
	struct acpi_ioremap *map;

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	list_for_each_entry_rcu(map, &acpi_ioremaps, list)
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		if (map->virt <= virt &&
		    virt + size <= map->virt + map->size)
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			return map;

	return NULL;
}

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void __iomem *__init_refok
acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
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{
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	struct acpi_ioremap *map, *tmp_map;
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	unsigned long flags;
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	void __iomem *virt;
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	acpi_physical_address pg_off;
	acpi_size pg_sz;
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	if (phys > ULONG_MAX) {
		printk(KERN_ERR PREFIX "Cannot map memory that high\n");
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		return NULL;
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	}
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	if (!acpi_gbl_permanent_mmap)
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		return __acpi_map_table((unsigned long)phys, size);
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	map = kzalloc(sizeof(*map), GFP_KERNEL);
	if (!map)
		return NULL;

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	pg_off = round_down(phys, PAGE_SIZE);
	pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
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	virt = acpi_os_ioremap(pg_off, pg_sz);
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	if (!virt) {
		kfree(map);
		return NULL;
	}

	INIT_LIST_HEAD(&map->list);
	map->virt = virt;
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	map->phys = pg_off;
	map->size = pg_sz;
	kref_init(&map->ref);
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	spin_lock_irqsave(&acpi_ioremap_lock, flags);
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	/* Check if page has already been mapped. */
	tmp_map = acpi_map_lookup(phys, size);
	if (tmp_map) {
		kref_get(&tmp_map->ref);
		spin_unlock_irqrestore(&acpi_ioremap_lock, flags);
		iounmap(map->virt);
		kfree(map);
		return tmp_map->virt + (phys - tmp_map->phys);
	}
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	list_add_tail_rcu(&map->list, &acpi_ioremaps);
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	spin_unlock_irqrestore(&acpi_ioremap_lock, flags);

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	return map->virt + (phys - map->phys);
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}
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EXPORT_SYMBOL_GPL(acpi_os_map_memory);
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static void acpi_kref_del_iomap(struct kref *ref)
{
	struct acpi_ioremap *map;

	map = container_of(ref, struct acpi_ioremap, ref);
	list_del_rcu(&map->list);
}

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void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
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{
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	struct acpi_ioremap *map;
	unsigned long flags;
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	int del;
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	if (!acpi_gbl_permanent_mmap) {
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		__acpi_unmap_table(virt, size);
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		return;
	}

	spin_lock_irqsave(&acpi_ioremap_lock, flags);
	map = acpi_map_lookup_virt(virt, size);
	if (!map) {
		spin_unlock_irqrestore(&acpi_ioremap_lock, flags);
		printk(KERN_ERR PREFIX "%s: bad address %p\n", __func__, virt);
		dump_stack();
		return;
	}

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	del = kref_put(&map->ref, acpi_kref_del_iomap);
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	spin_unlock_irqrestore(&acpi_ioremap_lock, flags);

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	if (!del)
		return;

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	synchronize_rcu();
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	iounmap(map->virt);
	kfree(map);
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}
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EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
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void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
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{
	if (!acpi_gbl_permanent_mmap)
		__acpi_unmap_table(virt, size);
}

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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;
}
EXPORT_SYMBOL_GPL(acpi_os_map_generic_address);

void acpi_os_unmap_generic_address(struct acpi_generic_address *addr)
{
	void __iomem *virt;
	unsigned long flags;
	acpi_size size = addr->bit_width / 8;

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

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

	spin_lock_irqsave(&acpi_ioremap_lock, flags);
	virt = acpi_map_vaddr_lookup(addr->address, size);
	spin_unlock_irqrestore(&acpi_ioremap_lock, flags);

	acpi_os_unmap_memory(virt, size);
}
EXPORT_SYMBOL_GPL(acpi_os_unmap_generic_address);

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#ifdef ACPI_FUTURE_USAGE
acpi_status
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acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
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{
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	if (!phys || !virt)
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		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
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acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
			    acpi_string * new_val)
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{
	if (!init_val || !new_val)
		return AE_BAD_PARAMETER;

	*new_val = NULL;
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	if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
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		printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
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		       acpi_os_name);
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		*new_val = acpi_os_name;
	}

	return AE_OK;
}

acpi_status
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acpi_os_table_override(struct acpi_table_header * existing_table,
		       struct acpi_table_header ** new_table)
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{
	if (!existing_table || !new_table)
		return AE_BAD_PARAMETER;

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	*new_table = NULL;

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#ifdef CONFIG_ACPI_CUSTOM_DSDT
	if (strncmp(existing_table->signature, "DSDT", 4) == 0)
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		*new_table = (struct acpi_table_header *)AmlCode;
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#endif
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	if (*new_table != NULL) {
		printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
			   "this is unsafe: tainting kernel\n",
		       existing_table->signature,
		       existing_table->oem_table_id);
		add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
	}
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	return AE_OK;
}

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static irqreturn_t acpi_irq(int irq, void *dev_id)
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{
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	u32 handled;

	handled = (*acpi_irq_handler) (acpi_irq_context);

	if (handled) {
		acpi_irq_handled++;
		return IRQ_HANDLED;
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	} else {
		acpi_irq_not_handled++;
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		return IRQ_NONE;
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	}
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}

acpi_status
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acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
				  void *context)
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{
	unsigned int irq;

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	acpi_irq_stats_init();

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	/*
	 * Ignore the GSI from the core, and use the value in our copy of the
	 * FADT. It may not be the same if an interrupt source override exists
	 * for the SCI.
	 */
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	gsi = acpi_gbl_FADT.sci_interrupt;
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	if (acpi_gsi_to_irq(gsi, &irq) < 0) {
		printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
		       gsi);
		return AE_OK;
	}

	acpi_irq_handler = handler;
	acpi_irq_context = context;
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	if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
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		printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
		return AE_NOT_ACQUIRED;
	}
	acpi_irq_irq = irq;

	return AE_OK;
}

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acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
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{
	if (irq) {
		free_irq(irq, acpi_irq);
		acpi_irq_handler = NULL;
		acpi_irq_irq = 0;
	}

	return AE_OK;
}

/*
 * Running in interpreter thread context, safe to sleep
 */

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void acpi_os_sleep(u64 ms)
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{
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	schedule_timeout_interruptible(msecs_to_jiffies(ms));
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}
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void acpi_os_stall(u32 us)
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{
	while (us) {
		u32 delay = 1000;

		if (delay > us)
			delay = us;
		udelay(delay);
		touch_nmi_watchdog();
		us -= delay;
	}
}
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/*
 * Support ACPI 3.0 AML Timer operand
 * Returns 64-bit free-running, monotonically increasing timer
 * with 100ns granularity
 */
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u64 acpi_os_get_timer(void)
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{
	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\n");

	return ++t;
}

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acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
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{
	u32 dummy;

	if (!value)
		value = &dummy;

603 604
	*value = 0;
	if (width <= 8) {
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		*(u8 *) value = inb(port);
606
	} else if (width <= 16) {
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		*(u16 *) value = inw(port);
608
	} else if (width <= 32) {
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		*(u32 *) value = inl(port);
610
	} else {
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		BUG();
	}

	return AE_OK;
}
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EXPORT_SYMBOL(acpi_os_read_port);

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acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
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{
621
	if (width <= 8) {
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		outb(value, port);
623
	} else if (width <= 16) {
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		outw(value, port);
625
	} else if (width <= 32) {
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		outl(value, port);
627
	} else {
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		BUG();
	}

	return AE_OK;
}
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EXPORT_SYMBOL(acpi_os_write_port);

acpi_status
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acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
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{
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	u32 dummy;
	void __iomem *virt_addr;
641 642
	int size = width / 8, unmap = 0;

643
	rcu_read_lock();
644
	virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
645
	rcu_read_unlock();
646
	if (!virt_addr) {
647
		virt_addr = acpi_os_ioremap(phys_addr, size);
648 649
		unmap = 1;
	}
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	if (!value)
		value = &dummy;

	switch (width) {
	case 8:
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		*(u8 *) value = readb(virt_addr);
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		break;
	case 16:
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		*(u16 *) value = readw(virt_addr);
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		break;
	case 32:
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		*(u32 *) value = readl(virt_addr);
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		break;
	default:
		BUG();
	}

667 668
	if (unmap)
		iounmap(virt_addr);
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	return AE_OK;
}

acpi_status
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acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
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{
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	void __iomem *virt_addr;
677 678
	int size = width / 8, unmap = 0;

679
	rcu_read_lock();
680
	virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
681
	rcu_read_unlock();
682
	if (!virt_addr) {
683
		virt_addr = acpi_os_ioremap(phys_addr, size);
684 685
		unmap = 1;
	}
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	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();
	}

701 702
	if (unmap)
		iounmap(virt_addr);
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	return AE_OK;
}

acpi_status
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acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
709
			       u64 *value, u32 width)
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{
	int result, size;
712
	u32 value32;
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	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;
	}

731 732
	result = raw_pci_read(pci_id->segment, pci_id->bus,
				PCI_DEVFN(pci_id->device, pci_id->function),
733 734
				reg, size, &value32);
	*value = value32;
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	return (result ? AE_ERROR : AE_OK);
}
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acpi_status
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acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
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				u64 value, u32 width)
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{
	int result, size;

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

759 760 761
	result = raw_pci_write(pci_id->segment, pci_id->bus,
				PCI_DEVFN(pci_id->device, pci_id->function),
				reg, size, value);
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	return (result ? AE_ERROR : AE_OK);
}

766
static void acpi_os_execute_deferred(struct work_struct *work)
767 768 769
{
	struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);

770 771
	if (dpc->wait)
		acpi_os_wait_events_complete(NULL);
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	dpc->function(dpc->context);
	kfree(dpc);
}

777 778 779 780 781 782 783 784 785 786 787 788 789 790 791
/*******************************************************************************
 *
 * 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.
 *
 ******************************************************************************/

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static acpi_status __acpi_os_execute(acpi_execute_type type,
	acpi_osd_exec_callback function, void *context, int hp)
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{
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	acpi_status status = AE_OK;
	struct acpi_os_dpc *dpc;
797
	struct workqueue_struct *queue;
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	int ret;
799 800 801
	ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
			  "Scheduling function [%p(%p)] for deferred execution.\n",
			  function, context));
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	/*
	 * Allocate/initialize DPC structure.  Note that this memory will be
805
	 * freed by the callee.  The kernel handles the work_struct list  in a
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	 * 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
809
	 * having a static work_struct.
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	 */
811

812
	dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
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	if (!dpc)
814
		return AE_NO_MEMORY;
815

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	dpc->function = function;
	dpc->context = context;
818

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	/*
	 * 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);
827
	dpc->wait = hp ? 1 : 0;
828 829 830 831 832 833 834 835

	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);

836 837 838 839 840 841 842 843
	/*
	 * 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);
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	if (!ret) {
846 847
		printk(KERN_ERR PREFIX
			  "Call to queue_work() failed.\n");
848 849
		status = AE_ERROR;
		kfree(dpc);
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	}
851
	return status;
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}
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acpi_status acpi_os_execute(acpi_execute_type type,
			    acpi_osd_exec_callback function, void *context)
{
	return __acpi_os_execute(type, function, context, 0);
}
859
EXPORT_SYMBOL(acpi_os_execute);
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acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function,
	void *context)
{
	return __acpi_os_execute(0, function, context, 1);
}

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void acpi_os_wait_events_complete(void *context)
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{
	flush_workqueue(kacpid_wq);
870
	flush_workqueue(kacpi_notify_wq);
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}
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EXPORT_SYMBOL(acpi_os_wait_events_complete);

/*
 * Deallocate the memory for a spinlock.
 */
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void acpi_os_delete_lock(acpi_spinlock handle)
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{
880
	return;
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}

acpi_status
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acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
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{
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	struct semaphore *sem = NULL;
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	sem = acpi_os_allocate(sizeof(struct semaphore));
	if (!sem)
890
		return AE_NO_MEMORY;
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	memset(sem, 0, sizeof(struct semaphore));

	sema_init(sem, initial_units);

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	*handle = (acpi_handle *) sem;
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	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
			  *handle, initial_units));
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900
	return AE_OK;
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}

/*
 * 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?
 */

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acpi_status acpi_os_delete_semaphore(acpi_handle handle)
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{
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	struct semaphore *sem = (struct semaphore *)handle;
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913 914

	if (!sem)
915
		return AE_BAD_PARAMETER;
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	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
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919
	BUG_ON(!list_empty(&sem->wait_list));
920
	kfree(sem);
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	sem = NULL;
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922

923
	return AE_OK;
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}

/*
 * TODO: Support for units > 1?
 */
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acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
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{
L
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	acpi_status status = AE_OK;
	struct semaphore *sem = (struct semaphore *)handle;
933
	long jiffies;
L
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934
	int ret = 0;
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	if (!sem || (units < 1))
937
		return AE_BAD_PARAMETER;
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	if (units > 1)
940
		return AE_SUPPORT;
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	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
			  handle, units, timeout));
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945 946 947 948 949 950 951 952
	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;
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	if (ACPI_FAILURE(status)) {
955
		ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
956
				  "Failed to acquire semaphore[%p|%d|%d], %s",
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				  handle, units, timeout,
				  acpi_format_exception(status)));
	} else {
		ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
961
				  "Acquired semaphore[%p|%d|%d]", handle,
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				  units, timeout));
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	}

965
	return status;
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}

/*
 * TODO: Support for units > 1?
 */
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acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
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{
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973
	struct semaphore *sem = (struct semaphore *)handle;
L
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	if (!sem || (units < 1))
976
		return AE_BAD_PARAMETER;
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	if (units > 1)
979
		return AE_SUPPORT;
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	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
			  units));
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	up(sem);

986
	return AE_OK;
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}
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#ifdef ACPI_FUTURE_USAGE
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u32 acpi_os_get_line(char *buffer)
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{

#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;
}
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#endif				/*  ACPI_FUTURE_USAGE  */
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acpi_status acpi_os_signal(u32 function, void *info)
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{
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	switch (function) {
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	case ACPI_SIGNAL_FATAL:
		printk(KERN_ERR PREFIX "Fatal opcode executed\n");
		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;
}
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static int __init acpi_os_name_setup(char *str)
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1033 1034
{
	char *p = acpi_os_name;
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	int count = ACPI_MAX_OVERRIDE_LEN - 1;
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	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;
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}

__setup("acpi_os_name=", acpi_os_name_setup);

1056 1057 1058 1059 1060 1061 1062 1063 1064 1065
#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];

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void __init acpi_osi_setup(char *str)
{
1068 1069 1070 1071
	struct osi_setup_entry *osi;
	bool enable = true;
	int i;

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	if (!acpi_gbl_create_osi_method)
		return;

	if (str == NULL || *str == '\0') {
		printk(KERN_INFO PREFIX "_OSI method disabled\n");
		acpi_gbl_create_osi_method = FALSE;
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096
		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;
		}
	}
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}

1099 1100
static void __init set_osi_linux(unsigned int enable)
{
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	if (osi_linux.enable != enable)
1102
		osi_linux.enable = enable;
1103 1104 1105 1106 1107 1108

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

1109 1110 1111 1112 1113
	return;
}

static void __init acpi_cmdline_osi_linux(unsigned int enable)
{
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	osi_linux.cmdline = 1;	/* cmdline set the default and override DMI */
	osi_linux.dmi = 0;
1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127
	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\n", d->ident);

	if (enable == -1)
		return;

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	osi_linux.dmi = 1;	/* DMI knows that this box asks OSI(Linux) */
1129
	set_osi_linux(enable);
1130 1131 1132 1133

	return;
}

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/*
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1135 1136
 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
 *
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 * empty string disables _OSI
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 * string starting with '!' disables that string
 * otherwise string is added to list, augmenting built-in strings
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 */
1141
static void __init acpi_osi_setup_late(void)
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{
1143 1144 1145
	struct osi_setup_entry *osi;
	char *str;
	int i;
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	acpi_status status;
1147

1148 1149 1150
	for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
		osi = &osi_setup_entries[i];
		str = osi->string;
1151

1152 1153 1154 1155
		if (*str == '\0')
			break;
		if (osi->enable) {
			status = acpi_install_interface(str);
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			if (ACPI_SUCCESS(status))
				printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
		} else {
			status = acpi_remove_interface(str);
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1162 1163 1164
			if (ACPI_SUCCESS(status))
				printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
		}
1165 1166 1167
	}
}

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static int __init osi_setup(char *str)
1169
{
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	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);
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	return 1;
}

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__setup("acpi_osi=", osi_setup);
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/* enable serialization to combat AE_ALREADY_EXISTS errors */
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static int __init acpi_serialize_setup(char *str)
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{
	printk(KERN_INFO PREFIX "serialize enabled\n");

	acpi_gbl_all_methods_serialized = TRUE;

	return 1;
}

__setup("acpi_serialize", acpi_serialize_setup);

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/* 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:
 *
1200
 *   - strict (default) (2)
1201
 *     -> further driver trying to access the resources will not load
1202
 *   - lax              (1)
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 *     -> 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

1214
static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
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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 */
1235
int acpi_check_resource_conflict(const struct resource *res)
1236 1237
{
	struct acpi_res_list *res_list_elem;
1238
	int ioport = 0, clash = 0;
1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266

	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) {
1267
			printk(KERN_WARNING "ACPI: resource %s %pR"
1268 1269
			       " conflicts with ACPI region %s "
			       "[%s 0x%zx-0x%zx]\n",
1270
			       res->name, res, res_list_elem->name,
1271 1272 1273 1274
			       (res_list_elem->resource_type ==
				ACPI_ADR_SPACE_SYSTEM_IO) ? "io" : "mem",
			       (size_t) res_list_elem->start,
			       (size_t) res_list_elem->end);
1275 1276 1277 1278 1279 1280 1281
			if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
				printk(KERN_NOTICE "ACPI: This conflict may"
				       " cause random problems and system"
				       " instability\n");
			printk(KERN_INFO "ACPI: If an ACPI driver is available"
			       " for this device, you should use it instead of"
			       " the native driver\n");
1282 1283 1284 1285 1286 1287
		}
		if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
			return -EBUSY;
	}
	return 0;
}
1288
EXPORT_SYMBOL(acpi_check_resource_conflict);
1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303

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);

1304 1305 1306 1307 1308 1309 1310 1311 1312
/*
 * 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);

1313 1314 1315 1316 1317 1318
/*
 * Acquire a spinlock.
 *
 * handle is a pointer to the spinlock_t.
 */

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acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1320
{
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	acpi_cpu_flags flags;
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	spin_lock_irqsave(lockp, flags);
1323 1324 1325 1326 1327 1328 1329
	return flags;
}

/*
 * Release a spinlock. See above.
 */

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void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1331
{
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	spin_unlock_irqrestore(lockp, flags);
1333 1334 1335 1336 1337 1338 1339 1340
}

#ifndef ACPI_USE_LOCAL_CACHE

/*******************************************************************************
 *
 * FUNCTION:    acpi_os_create_cache
 *
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 * 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
1345
 *
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 * RETURN:      status
1347 1348 1349 1350 1351 1352
 *
 * DESCRIPTION: Create a cache object
 *
 ******************************************************************************/

acpi_status
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acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1354
{
1355
	*cache = kmem_cache_create(name, size, 0, 0, NULL);
1356
	if (*cache == NULL)
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		return AE_ERROR;
	else
		return AE_OK;
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}

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

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acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1375
{
1376
	kmem_cache_shrink(cache);
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	return (AE_OK);
1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392
}

/*******************************************************************************
 *
 * 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.
 *
 ******************************************************************************/

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acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1394
{
1395
	kmem_cache_destroy(cache);
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	return (AE_OK);
1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412
}

/*******************************************************************************
 *
 * 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.
 *
 ******************************************************************************/

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acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1414
{
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	kmem_cache_free(cache, object);
	return (AE_OK);
1417 1418
}

1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
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:
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		/* Only interference checks against SystemIO and SystemMemory
1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501
		   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;
}

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/******************************************************************************
 *
 * 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,
1522 1523
    acpi_size               length,
    char *name)
B
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1524
{
1525
	struct acpi_res_list *res;
1526
	int added;
1527 1528
	if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
		return AE_OK;
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1530 1531 1532
	switch (space_id) {
	case ACPI_ADR_SPACE_SYSTEM_IO:
	case ACPI_ADR_SPACE_SYSTEM_MEMORY:
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		/* Only interference checks against SystemIO and SystemMemory
1534 1535 1536 1537 1538 1539 1540 1541 1542 1543
		   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);
1544
		added = acpi_res_list_add(res);
1545
		spin_unlock(&acpi_res_lock);
1546 1547 1548
		pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, "
			 "name: %s\n", added ? "Added" : "Already exist",
			 (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
1549 1550 1551 1552
			 ? "SystemIO" : "System Memory",
			 (unsigned long long)res->start,
			 (unsigned long long)res->end,
			 res->name);
1553 1554
		if (!added)
			kfree(res);
1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565
		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;
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}
1567
#endif
1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578

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;
}

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acpi_status __init acpi_os_initialize1(void)
1580 1581 1582 1583 1584 1585 1586
{
	kacpid_wq = create_workqueue("kacpid");
	kacpi_notify_wq = create_workqueue("kacpi_notify");
	kacpi_hotplug_wq = create_workqueue("kacpi_hotplug");
	BUG_ON(!kacpid_wq);
	BUG_ON(!kacpi_notify_wq);
	BUG_ON(!kacpi_hotplug_wq);
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1587 1588
	acpi_install_interface_handler(acpi_osi_handler);
	acpi_osi_setup_late();
1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609
	return AE_OK;
}

acpi_status acpi_os_terminate(void)
{
	if (acpi_irq_handler) {
		acpi_os_remove_interrupt_handler(acpi_irq_irq,
						 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;
}