i386: prepare shared kernel/apm.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 2403 deletions

diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
deleted file mode 100644
index f02a8aca826b..000000000000
--- a/arch/i386/kernel/apm.c
+++ /dev/null
@@ -1,2403 +0,0 @@
-/* -*- linux-c -*-
- * APM BIOS driver for Linux
- * Copyright 1994-2001 Stephen Rothwell (sfr@canb.auug.org.au)
- *
- * Initial development of this driver was funded by NEC Australia P/L
- *	and NEC Corporation
- *
- * 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, 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.
- *
- * October 1995, Rik Faith (faith@cs.unc.edu):
- *    Minor enhancements and updates (to the patch set) for 1.3.x
- *    Documentation
- * January 1996, Rik Faith (faith@cs.unc.edu):
- *    Make /proc/apm easy to format (bump driver version)
- * March 1996, Rik Faith (faith@cs.unc.edu):
- *    Prohibit APM BIOS calls unless apm_enabled.
- *    (Thanks to Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>)
- * April 1996, Stephen Rothwell (sfr@canb.auug.org.au)
- *    Version 1.0 and 1.1
- * May 1996, Version 1.2
- * Feb 1998, Version 1.3
- * Feb 1998, Version 1.4
- * Aug 1998, Version 1.5
- * Sep 1998, Version 1.6
- * Nov 1998, Version 1.7
- * Jan 1999, Version 1.8
- * Jan 1999, Version 1.9
- * Oct 1999, Version 1.10
- * Nov 1999, Version 1.11
- * Jan 2000, Version 1.12
- * Feb 2000, Version 1.13
- * Nov 2000, Version 1.14
- * Oct 2001, Version 1.15
- * Jan 2002, Version 1.16
- * Oct 2002, Version 1.16ac
- *
- * History:
- *    0.6b: first version in official kernel, Linux 1.3.46
- *    0.7: changed /proc/apm format, Linux 1.3.58
- *    0.8: fixed gcc 2.7.[12] compilation problems, Linux 1.3.59
- *    0.9: only call bios if bios is present, Linux 1.3.72
- *    1.0: use fixed device number, consolidate /proc/apm into this file,
- *         Linux 1.3.85
- *    1.1: support user-space standby and suspend, power off after system
- *         halted, Linux 1.3.98
- *    1.2: When resetting RTC after resume, take care so that the time
- *         is only incorrect by 30-60mS (vs. 1S previously) (Gabor J. Toth
- *         <jtoth@princeton.edu>); improve interaction between
- *         screen-blanking and gpm (Stephen Rothwell); Linux 1.99.4
- *    1.2a:Simple change to stop mysterious bug reports with SMP also added
- *	   levels to the printk calls. APM is not defined for SMP machines.
- *         The new replacment for it is, but Linux doesn't yet support this.
- *         Alan Cox Linux 2.1.55
- *    1.3: Set up a valid data descriptor 0x40 for buggy BIOS's
- *    1.4: Upgraded to support APM 1.2. Integrated ThinkPad suspend patch by
- *         Dean Gaudet <dgaudet@arctic.org>.
- *         C. Scott Ananian <cananian@alumni.princeton.edu> Linux 2.1.87
- *    1.5: Fix segment register reloading (in case of bad segments saved
- *         across BIOS call).
- *         Stephen Rothwell
- *    1.6: Cope with complier/assembler differences.
- *         Only try to turn off the first display device.
- *         Fix OOPS at power off with no APM BIOS by Jan Echternach
- *                   <echter@informatik.uni-rostock.de>
- *         Stephen Rothwell
- *    1.7: Modify driver's cached copy of the disabled/disengaged flags
- *         to reflect current state of APM BIOS.
- *         Chris Rankin <rankinc@bellsouth.net>
- *         Reset interrupt 0 timer to 100Hz after suspend
- *         Chad Miller <cmiller@surfsouth.com>
- *         Add CONFIG_APM_IGNORE_SUSPEND_BOUNCE
- *         Richard Gooch <rgooch@atnf.csiro.au>
- *         Allow boot time disabling of APM
- *         Make boot messages far less verbose by default
- *         Make asm safer
- *         Stephen Rothwell
- *    1.8: Add CONFIG_APM_RTC_IS_GMT
- *         Richard Gooch <rgooch@atnf.csiro.au>
- *         change APM_NOINTS to CONFIG_APM_ALLOW_INTS
- *         remove dependency on CONFIG_PROC_FS
- *         Stephen Rothwell
- *    1.9: Fix small typo.  <laslo@wodip.opole.pl>
- *         Try to cope with BIOS's that need to have all display
- *         devices blanked and not just the first one.
- *         Ross Paterson <ross@soi.city.ac.uk>
- *         Fix segment limit setting it has always been wrong as
- *         the segments needed to have byte granularity.
- *         Mark a few things __init.
- *         Add hack to allow power off of SMP systems by popular request.
- *         Use CONFIG_SMP instead of __SMP__
- *         Ignore BOUNCES for three seconds.
- *         Stephen Rothwell
- *   1.10: Fix for Thinkpad return code.
- *         Merge 2.2 and 2.3 drivers.
- *         Remove APM dependencies in arch/i386/kernel/process.c
- *         Remove APM dependencies in drivers/char/sysrq.c
- *         Reset time across standby.
- *         Allow more inititialisation on SMP.
- *         Remove CONFIG_APM_POWER_OFF and make it boot time
- *         configurable (default on).
- *         Make debug only a boot time parameter (remove APM_DEBUG).
- *         Try to blank all devices on any error.
- *   1.11: Remove APM dependencies in drivers/char/console.c
- *         Check nr_running to detect if we are idle (from
- *         Borislav Deianov <borislav@lix.polytechnique.fr>)
- *         Fix for bioses that don't zero the top part of the
- *         entrypoint offset (Mario Sitta <sitta@al.unipmn.it>)
- *         (reported by Panos Katsaloulis <teras@writeme.com>).
- *         Real mode power off patch (Walter Hofmann
- *         <Walter.Hofmann@physik.stud.uni-erlangen.de>).
- *   1.12: Remove CONFIG_SMP as the compiler will optimize
- *         the code away anyway (smp_num_cpus == 1 in UP)
- *         noted by Artur Skawina <skawina@geocities.com>.
- *         Make power off under SMP work again.
- *         Fix thinko with initial engaging of BIOS.
- *         Make sure power off only happens on CPU 0
- *         (Paul "Rusty" Russell <rusty@rustcorp.com.au>).
- *         Do error notification to user mode if BIOS calls fail.
- *         Move entrypoint offset fix to ...boot/setup.S
- *         where it belongs (Cosmos <gis88564@cis.nctu.edu.tw>).
- *         Remove smp-power-off. SMP users must now specify
- *         "apm=power-off" on the kernel command line. Suggested
- *         by Jim Avera <jima@hal.com>, modified by Alan Cox
- *         <alan@lxorguk.ukuu.org.uk>.
- *         Register the /proc/apm entry even on SMP so that
- *         scripts that check for it before doing power off
- *         work (Jim Avera <jima@hal.com>).
- *   1.13: Changes for new pm_ interfaces (Andy Henroid
- *         <andy_henroid@yahoo.com>).
- *         Modularize the code.
- *         Fix the Thinkpad (again) :-( (CONFIG_APM_IGNORE_MULTIPLE_SUSPENDS
- *         is now the way life works).
- *         Fix thinko in suspend() (wrong return).
- *         Notify drivers on critical suspend.
- *         Make kapmd absorb more idle time (Pavel Machek <pavel@suse.cz>
- *         modified by sfr).
- *         Disable interrupts while we are suspended (Andy Henroid
- *         <andy_henroid@yahoo.com> fixed by sfr).
- *         Make power off work on SMP again (Tony Hoyle
- *         <tmh@magenta-logic.com> and <zlatko@iskon.hr>) modified by sfr.
- *         Remove CONFIG_APM_SUSPEND_BOUNCE.  The bounce ignore
- *         interval is now configurable.
- *   1.14: Make connection version persist across module unload/load.
- *         Enable and engage power management earlier.
- *         Disengage power management on module unload.
- *         Changed to use the sysrq-register hack for registering the
- *         power off function called by magic sysrq based upon discussions
- *         in irc://irc.openprojects.net/#kernelnewbies
- *         (Crutcher Dunnavant <crutcher+kernel@datastacks.com>).
- *         Make CONFIG_APM_REAL_MODE_POWER_OFF run time configurable.
- *         (Arjan van de Ven <arjanv@redhat.com>) modified by sfr.
- *         Work around byte swap bug in one of the Vaio's BIOS's
- *         (Marc Boucher <marc@mbsi.ca>).
- *         Exposed the disable flag to dmi so that we can handle known
- *         broken APM (Alan Cox <alan@redhat.com>).
- *   1.14ac: If the BIOS says "I slowed the CPU down" then don't spin
- *         calling it - instead idle. (Alan Cox <alan@redhat.com>)
- *         If an APM idle fails log it and idle sensibly
- *   1.15: Don't queue events to clients who open the device O_WRONLY.
- *         Don't expect replies from clients who open the device O_RDONLY.
- *         (Idea from Thomas Hood)
- *         Minor waitqueue cleanups. (John Fremlin <chief@bandits.org>)
- *   1.16: Fix idle calling. (Andreas Steinmetz <ast@domdv.de> et al.)
- *         Notify listeners of standby or suspend events before notifying
- *         drivers. Return EBUSY to ioctl() if suspend is rejected.
- *         (Russell King <rmk@arm.linux.org.uk> and Thomas Hood)
- *         Ignore first resume after we generate our own resume event
- *         after a suspend (Thomas Hood)
- *         Daemonize now gets rid of our controlling terminal (sfr).
- *         CONFIG_APM_CPU_IDLE now just affects the default value of
- *         idle_threshold (sfr).
- *         Change name of kernel apm daemon (as it no longer idles) (sfr).
- *   1.16ac: Fix up SMP support somewhat. You can now force SMP on and we
- *	   make _all_ APM calls on the CPU#0. Fix unsafe sign bug.
- *	   TODO: determine if its "boot CPU" or "CPU0" we want to lock to.
- *
- * APM 1.1 Reference:
- *
- *   Intel Corporation, Microsoft Corporation. Advanced Power Management
- *   (APM) BIOS Interface Specification, Revision 1.1, September 1993.
- *   Intel Order Number 241704-001.  Microsoft Part Number 781-110-X01.
- *
- * [This document is available free from Intel by calling 800.628.8686 (fax
- * 916.356.6100) or 800.548.4725; or via anonymous ftp from
- * ftp://ftp.intel.com/pub/IAL/software_specs/apmv11.doc.  It is also
- * available from Microsoft by calling 206.882.8080.]
- *
- * APM 1.2 Reference:
- *   Intel Corporation, Microsoft Corporation. Advanced Power Management
- *   (APM) BIOS Interface Specification, Revision 1.2, February 1996.
- *
- * [This document is available from Microsoft at:
- *    http://www.microsoft.com/whdc/archive/amp_12.mspx]
- */
-
-#include <linux/module.h>
-
-#include <linux/poll.h>
-#include <linux/types.h>
-#include <linux/stddef.h>
-#include <linux/timer.h>
-#include <linux/fcntl.h>
-#include <linux/slab.h>
-#include <linux/stat.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/miscdevice.h>
-#include <linux/apm_bios.h>
-#include <linux/init.h>
-#include <linux/time.h>
-#include <linux/sched.h>
-#include <linux/pm.h>
-#include <linux/pm_legacy.h>
-#include <linux/capability.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/freezer.h>
-#include <linux/smp.h>
-#include <linux/dmi.h>
-#include <linux/suspend.h>
-#include <linux/kthread.h>
-
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/desc.h>
-#include <asm/i8253.h>
-#include <asm/paravirt.h>
-#include <asm/reboot.h>
-
-#include "io_ports.h"
-
-#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
-extern int (*console_blank_hook)(int);
-#endif
-
-/*
- * The apm_bios device is one of the misc char devices.
- * This is its minor number.
- */
-#define	APM_MINOR_DEV	134
-
-/*
- * See Documentation/Config.help for the configuration options.
- *
- * Various options can be changed at boot time as follows:
- * (We allow underscores for compatibility with the modules code)
- *	apm=on/off			enable/disable APM
- *	    [no-]allow[-_]ints		allow interrupts during BIOS calls
- *	    [no-]broken[-_]psr		BIOS has a broken GetPowerStatus call
- *	    [no-]realmode[-_]power[-_]off	switch to real mode before
- *	    					powering off
- *	    [no-]debug			log some debugging messages
- *	    [no-]power[-_]off		power off on shutdown
- *	    [no-]smp			Use apm even on an SMP box
- *	    bounce[-_]interval=<n>	number of ticks to ignore suspend
- *	    				bounces
- *          idle[-_]threshold=<n>       System idle percentage above which to
- *                                      make APM BIOS idle calls. Set it to
- *                                      100 to disable.
- *          idle[-_]period=<n>          Period (in 1/100s of a second) over
- *                                      which the idle percentage is
- *                                      calculated.
- */
-
-/* KNOWN PROBLEM MACHINES:
- *
- * U: TI 4000M TravelMate: BIOS is *NOT* APM compliant
- *                         [Confirmed by TI representative]
- * ?: ACER 486DX4/75: uses dseg 0040, in violation of APM specification
- *                    [Confirmed by BIOS disassembly]
- *                    [This may work now ...]
- * P: Toshiba 1950S: battery life information only gets updated after resume
- * P: Midwest Micro Soundbook Elite DX2/66 monochrome: screen blanking
- * 	broken in BIOS [Reported by Garst R. Reese <reese@isn.net>]
- * ?: AcerNote-950: oops on reading /proc/apm - workaround is a WIP
- * 	Neale Banks <neale@lowendale.com.au> December 2000
- *
- * Legend: U = unusable with APM patches
- *         P = partially usable with APM patches
- */
-
-/*
- * Define as 1 to make the driver always call the APM BIOS busy
- * routine even if the clock was not reported as slowed by the
- * idle routine.  Otherwise, define as 0.
- */
-#define ALWAYS_CALL_BUSY   1
-
-/*
- * Define to make the APM BIOS calls zero all data segment registers (so
- * that an incorrect BIOS implementation will cause a kernel panic if it
- * tries to write to arbitrary memory).
- */
-#define APM_ZERO_SEGS
-
-#include "apm.h"
-
-/*
- * Define to re-initialize the interrupt 0 timer to 100 Hz after a suspend.
- * This patched by Chad Miller <cmiller@surfsouth.com>, original code by
- * David Chen <chen@ctpa04.mit.edu>
- */
-#undef INIT_TIMER_AFTER_SUSPEND
-
-#ifdef INIT_TIMER_AFTER_SUSPEND
-#include <linux/timex.h>
-#include <asm/io.h>
-#include <linux/delay.h>
-#endif
-
-/*
- * Need to poll the APM BIOS every second
- */
-#define APM_CHECK_TIMEOUT	(HZ)
-
-/*
- * Ignore suspend events for this amount of time after a resume
- */
-#define DEFAULT_BOUNCE_INTERVAL		(3 * HZ)
-
-/*
- * Maximum number of events stored
- */
-#define APM_MAX_EVENTS		20
-
-/*
- * The per-file APM data
- */
-struct apm_user {
-	int		magic;
-	struct apm_user *	next;
-	unsigned int	suser: 1;
-	unsigned int	writer: 1;
-	unsigned int	reader: 1;
-	unsigned int	suspend_wait: 1;
-	int		suspend_result;
-	int		suspends_pending;
-	int		standbys_pending;
-	int		suspends_read;
-	int		standbys_read;
-	int		event_head;
-	int		event_tail;
-	apm_event_t	events[APM_MAX_EVENTS];
-};
-
-/*
- * The magic number in apm_user
- */
-#define APM_BIOS_MAGIC		0x4101
-
-/*
- * idle percentage above which bios idle calls are done
- */
-#ifdef CONFIG_APM_CPU_IDLE
-#define DEFAULT_IDLE_THRESHOLD	95
-#else
-#define DEFAULT_IDLE_THRESHOLD	100
-#endif
-#define DEFAULT_IDLE_PERIOD	(100 / 3)
-
-/*
- * Local variables
- */
-static struct {
-	unsigned long	offset;
-	unsigned short	segment;
-}				apm_bios_entry;
-static int			clock_slowed;
-static int			idle_threshold __read_mostly = DEFAULT_IDLE_THRESHOLD;
-static int			idle_period __read_mostly = DEFAULT_IDLE_PERIOD;
-static int			set_pm_idle;
-static int			suspends_pending;
-static int			standbys_pending;
-static int			ignore_sys_suspend;
-static int			ignore_normal_resume;
-static int			bounce_interval __read_mostly = DEFAULT_BOUNCE_INTERVAL;
-
-static int			debug __read_mostly;
-static int			smp __read_mostly;
-static int			apm_disabled = -1;
-#ifdef CONFIG_SMP
-static int			power_off;
-#else
-static int			power_off = 1;
-#endif
-#ifdef CONFIG_APM_REAL_MODE_POWER_OFF
-static int			realmode_power_off = 1;
-#else
-static int			realmode_power_off;
-#endif
-#ifdef CONFIG_APM_ALLOW_INTS
-static int			allow_ints = 1;
-#else
-static int			allow_ints;
-#endif
-static int			broken_psr;
-
-static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
-static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
-static struct apm_user *	user_list;
-static DEFINE_SPINLOCK(user_list_lock);
-static const struct desc_struct	bad_bios_desc = { 0, 0x00409200 };
-
-static const char		driver_version[] = "1.16ac";	/* no spaces */
-
-static struct task_struct *kapmd_task;
-
-/*
- *	APM event names taken from the APM 1.2 specification. These are
- *	the message codes that the BIOS uses to tell us about events
- */
-static const char *	const apm_event_name[] = {
-	"system standby",
-	"system suspend",
-	"normal resume",
-	"critical resume",
-	"low battery",
-	"power status change",
-	"update time",
-	"critical suspend",
-	"user standby",
-	"user suspend",
-	"system standby resume",
-	"capabilities change"
-};
-#define NR_APM_EVENT_NAME ARRAY_SIZE(apm_event_name)
-
-typedef struct lookup_t {
-	int	key;
-	char *	msg;
-} lookup_t;
-
-/*
- *	The BIOS returns a set of standard error codes in AX when the
- *	carry flag is set.
- */
- 
-static const lookup_t error_table[] = {
-/* N/A	{ APM_SUCCESS,		"Operation succeeded" }, */
-	{ APM_DISABLED,		"Power management disabled" },
-	{ APM_CONNECTED,	"Real mode interface already connected" },
-	{ APM_NOT_CONNECTED,	"Interface not connected" },
-	{ APM_16_CONNECTED,	"16 bit interface already connected" },
-/* N/A	{ APM_16_UNSUPPORTED,	"16 bit interface not supported" }, */
-	{ APM_32_CONNECTED,	"32 bit interface already connected" },
-	{ APM_32_UNSUPPORTED,	"32 bit interface not supported" },
-	{ APM_BAD_DEVICE,	"Unrecognized device ID" },
-	{ APM_BAD_PARAM,	"Parameter out of range" },
-	{ APM_NOT_ENGAGED,	"Interface not engaged" },
-	{ APM_BAD_FUNCTION,     "Function not supported" },
-	{ APM_RESUME_DISABLED,	"Resume timer disabled" },
-	{ APM_BAD_STATE,	"Unable to enter requested state" },
-/* N/A	{ APM_NO_EVENTS,	"No events pending" }, */
-	{ APM_NO_ERROR,		"BIOS did not set a return code" },
-	{ APM_NOT_PRESENT,	"No APM present" }
-};
-#define ERROR_COUNT	ARRAY_SIZE(error_table)
-
-/**
- *	apm_error	-	display an APM error
- *	@str: information string
- *	@err: APM BIOS return code
- *
- *	Write a meaningful log entry to the kernel log in the event of
- *	an APM error.
- */
- 
-static void apm_error(char *str, int err)
-{
-	int	i;
-
-	for (i = 0; i < ERROR_COUNT; i++)
-		if (error_table[i].key == err) break;
-	if (i < ERROR_COUNT)
-		printk(KERN_NOTICE "apm: %s: %s\n", str, error_table[i].msg);
-	else
-		printk(KERN_NOTICE "apm: %s: unknown error code %#2.2x\n",
-			str, err);
-}
-
-/*
- * Lock APM functionality to physical CPU 0
- */
- 
-#ifdef CONFIG_SMP
-
-static cpumask_t apm_save_cpus(void)
-{
-	cpumask_t x = current->cpus_allowed;
-	/* Some bioses don't like being called from CPU != 0 */
-	set_cpus_allowed(current, cpumask_of_cpu(0));
-	BUG_ON(smp_processor_id() != 0);
-	return x;
-}
-
-static inline void apm_restore_cpus(cpumask_t mask)
-{
-	set_cpus_allowed(current, mask);
-}
-
-#else
-
-/*
- *	No CPU lockdown needed on a uniprocessor
- */
- 
-#define apm_save_cpus()		(current->cpus_allowed)
-#define apm_restore_cpus(x)	(void)(x)
-
-#endif
-
-/*
- * These are the actual BIOS calls.  Depending on APM_ZERO_SEGS and
- * apm_info.allow_ints, we are being really paranoid here!  Not only
- * are interrupts disabled, but all the segment registers (except SS)
- * are saved and zeroed this means that if the BIOS tries to reference
- * any data without explicitly loading the segment registers, the kernel
- * will fault immediately rather than have some unforeseen circumstances
- * for the rest of the kernel.  And it will be very obvious!  :-) Doing
- * this depends on CS referring to the same physical memory as DS so that
- * DS can be zeroed before the call. Unfortunately, we can't do anything
- * about the stack segment/pointer.  Also, we tell the compiler that
- * everything could change.
- *
- * Also, we KNOW that for the non error case of apm_bios_call, there
- * is no useful data returned in the low order 8 bits of eax.
- */
-
-static inline unsigned long __apm_irq_save(void)
-{
-	unsigned long flags;
-	local_save_flags(flags);
-	if (apm_info.allow_ints) {
-		if (irqs_disabled_flags(flags))
-			local_irq_enable();
-	} else
-		local_irq_disable();
-
-	return flags;
-}
-
-#define apm_irq_save(flags) \
-	do { flags = __apm_irq_save(); } while (0)
-
-static inline void apm_irq_restore(unsigned long flags)
-{
-	if (irqs_disabled_flags(flags))
-		local_irq_disable();
-	else if (irqs_disabled())
-		local_irq_enable();
-}
-
-#ifdef APM_ZERO_SEGS
-#	define APM_DECL_SEGS \
-		unsigned int saved_fs; unsigned int saved_gs;
-#	define APM_DO_SAVE_SEGS \
-		savesegment(fs, saved_fs); savesegment(gs, saved_gs)
-#	define APM_DO_RESTORE_SEGS \
-		loadsegment(fs, saved_fs); loadsegment(gs, saved_gs)
-#else
-#	define APM_DECL_SEGS
-#	define APM_DO_SAVE_SEGS
-#	define APM_DO_RESTORE_SEGS
-#endif
-
-/**
- *	apm_bios_call	-	Make an APM BIOS 32bit call
- *	@func: APM function to execute
- *	@ebx_in: EBX register for call entry
- *	@ecx_in: ECX register for call entry
- *	@eax: EAX register return
- *	@ebx: EBX register return
- *	@ecx: ECX register return
- *	@edx: EDX register return
- *	@esi: ESI register return
- *
- *	Make an APM call using the 32bit protected mode interface. The
- *	caller is responsible for knowing if APM BIOS is configured and
- *	enabled. This call can disable interrupts for a long period of
- *	time on some laptops.  The return value is in AH and the carry
- *	flag is loaded into AL.  If there is an error, then the error
- *	code is returned in AH (bits 8-15 of eax) and this function
- *	returns non-zero.
- */
- 
-static u8 apm_bios_call(u32 func, u32 ebx_in, u32 ecx_in,
-	u32 *eax, u32 *ebx, u32 *ecx, u32 *edx, u32 *esi)
-{
-	APM_DECL_SEGS
-	unsigned long		flags;
-	cpumask_t		cpus;
-	int			cpu;
-	struct desc_struct	save_desc_40;
-	struct desc_struct	*gdt;
-
-	cpus = apm_save_cpus();
-	
-	cpu = get_cpu();
-	gdt = get_cpu_gdt_table(cpu);
-	save_desc_40 = gdt[0x40 / 8];
-	gdt[0x40 / 8] = bad_bios_desc;
-
-	apm_irq_save(flags);
-	APM_DO_SAVE_SEGS;
-	apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi);
-	APM_DO_RESTORE_SEGS;
-	apm_irq_restore(flags);
-	gdt[0x40 / 8] = save_desc_40;
-	put_cpu();
-	apm_restore_cpus(cpus);
-	
-	return *eax & 0xff;
-}
-
-/**
- *	apm_bios_call_simple	-	make a simple APM BIOS 32bit call
- *	@func: APM function to invoke
- *	@ebx_in: EBX register value for BIOS call
- *	@ecx_in: ECX register value for BIOS call
- *	@eax: EAX register on return from the BIOS call
- *
- *	Make a BIOS call that returns one value only, or just status.
- *	If there is an error, then the error code is returned in AH
- *	(bits 8-15 of eax) and this function returns non-zero. This is
- *	used for simpler BIOS operations. This call may hold interrupts
- *	off for a long time on some laptops.
- */
-
-static u8 apm_bios_call_simple(u32 func, u32 ebx_in, u32 ecx_in, u32 *eax)
-{
-	u8			error;
-	APM_DECL_SEGS
-	unsigned long		flags;
-	cpumask_t		cpus;
-	int			cpu;
-	struct desc_struct	save_desc_40;
-	struct desc_struct	*gdt;
-
-	cpus = apm_save_cpus();
-	
-	cpu = get_cpu();
-	gdt = get_cpu_gdt_table(cpu);
-	save_desc_40 = gdt[0x40 / 8];
-	gdt[0x40 / 8] = bad_bios_desc;
-
-	apm_irq_save(flags);
-	APM_DO_SAVE_SEGS;
-	error = apm_bios_call_simple_asm(func, ebx_in, ecx_in, eax);
-	APM_DO_RESTORE_SEGS;
-	apm_irq_restore(flags);
-	gdt[0x40 / 8] = save_desc_40;
-	put_cpu();
-	apm_restore_cpus(cpus);
-	return error;
-}
-
-/**
- *	apm_driver_version	-	APM driver version
- *	@val:	loaded with the APM version on return
- *
- *	Retrieve the APM version supported by the BIOS. This is only
- *	supported for APM 1.1 or higher. An error indicates APM 1.0 is
- *	probably present.
- *
- *	On entry val should point to a value indicating the APM driver
- *	version with the high byte being the major and the low byte the
- *	minor number both in BCD
- *
- *	On return it will hold the BIOS revision supported in the
- *	same format.
- */
-
-static int apm_driver_version(u_short *val)
-{
-	u32	eax;
-
-	if (apm_bios_call_simple(APM_FUNC_VERSION, 0, *val, &eax))
-		return (eax >> 8) & 0xff;
-	*val = eax;
-	return APM_SUCCESS;
-}
-
-/**
- *	apm_get_event	-	get an APM event from the BIOS
- *	@event: pointer to the event
- *	@info: point to the event information
- *
- *	The APM BIOS provides a polled information for event
- *	reporting. The BIOS expects to be polled at least every second
- *	when events are pending. When a message is found the caller should
- *	poll until no more messages are present.  However, this causes
- *	problems on some laptops where a suspend event notification is
- *	not cleared until it is acknowledged.
- *
- *	Additional information is returned in the info pointer, providing
- *	that APM 1.2 is in use. If no messges are pending the value 0x80
- *	is returned (No power management events pending).
- */
- 
-static int apm_get_event(apm_event_t *event, apm_eventinfo_t *info)
-{
-	u32	eax;
-	u32	ebx;
-	u32	ecx;
-	u32	dummy;
-
-	if (apm_bios_call(APM_FUNC_GET_EVENT, 0, 0, &eax, &ebx, &ecx,
-			&dummy, &dummy))
-		return (eax >> 8) & 0xff;
-	*event = ebx;
-	if (apm_info.connection_version < 0x0102)
-		*info = ~0; /* indicate info not valid */
-	else
-		*info = ecx;
-	return APM_SUCCESS;
-}
-
-/**
- *	set_power_state	-	set the power management state
- *	@what: which items to transition
- *	@state: state to transition to
- *
- *	Request an APM change of state for one or more system devices. The
- *	processor state must be transitioned last of all. what holds the
- *	class of device in the upper byte and the device number (0xFF for
- *	all) for the object to be transitioned.
- *
- *	The state holds the state to transition to, which may in fact
- *	be an acceptance of a BIOS requested state change.
- */
- 
-static int set_power_state(u_short what, u_short state)
-{
-	u32	eax;
-
-	if (apm_bios_call_simple(APM_FUNC_SET_STATE, what, state, &eax))
-		return (eax >> 8) & 0xff;
-	return APM_SUCCESS;
-}
-
-/**
- *	set_system_power_state - set system wide power state
- *	@state: which state to enter
- *
- *	Transition the entire system into a new APM power state.
- */
- 
-static int set_system_power_state(u_short state)
-{
-	return set_power_state(APM_DEVICE_ALL, state);
-}
-
-/**
- *	apm_do_idle	-	perform power saving
- *
- *	This function notifies the BIOS that the processor is (in the view
- *	of the OS) idle. It returns -1 in the event that the BIOS refuses
- *	to handle the idle request. On a success the function returns 1
- *	if the BIOS did clock slowing or 0 otherwise.
- */
- 
-static int apm_do_idle(void)
-{
-	u32	eax;
-	u8	ret = 0;
-	int	idled = 0;
-	int	polling;
-
-	polling = !!(current_thread_info()->status & TS_POLLING);
-	if (polling) {
-		current_thread_info()->status &= ~TS_POLLING;
-		/*
-		 * TS_POLLING-cleared state must be visible before we
-		 * test NEED_RESCHED:
-		 */
-		smp_mb();
-	}
-	if (!need_resched()) {
-		idled = 1;
-		ret = apm_bios_call_simple(APM_FUNC_IDLE, 0, 0, &eax);
-	}
-	if (polling)
-		current_thread_info()->status |= TS_POLLING;
-
-	if (!idled)
-		return 0;
-
-	if (ret) {
-		static unsigned long t;
-
-		/* This always fails on some SMP boards running UP kernels.
-		 * Only report the failure the first 5 times.
-		 */
-		if (++t < 5)
-		{
-			printk(KERN_DEBUG "apm_do_idle failed (%d)\n",
-					(eax >> 8) & 0xff);
-			t = jiffies;
-		}
-		return -1;
-	}
-	clock_slowed = (apm_info.bios.flags & APM_IDLE_SLOWS_CLOCK) != 0;
-	return clock_slowed;
-}
-
-/**
- *	apm_do_busy	-	inform the BIOS the CPU is busy
- *
- *	Request that the BIOS brings the CPU back to full performance. 
- */
- 
-static void apm_do_busy(void)
-{
-	u32	dummy;
-
-	if (clock_slowed || ALWAYS_CALL_BUSY) {
-		(void) apm_bios_call_simple(APM_FUNC_BUSY, 0, 0, &dummy);
-		clock_slowed = 0;
-	}
-}
-
-/*
- * If no process has really been interested in
- * the CPU for some time, we want to call BIOS
- * power management - we probably want
- * to conserve power.
- */
-#define IDLE_CALC_LIMIT   (HZ * 100)
-#define IDLE_LEAKY_MAX    16
-
-static void (*original_pm_idle)(void) __read_mostly;
-
-/**
- * apm_cpu_idle		-	cpu idling for APM capable Linux
- *
- * This is the idling function the kernel executes when APM is available. It 
- * tries to do BIOS powermanagement based on the average system idle time.
- * Furthermore it calls the system default idle routine.
- */
-
-static void apm_cpu_idle(void)
-{
-	static int use_apm_idle; /* = 0 */
-	static unsigned int last_jiffies; /* = 0 */
-	static unsigned int last_stime; /* = 0 */
-
-	int apm_idle_done = 0;
-	unsigned int jiffies_since_last_check = jiffies - last_jiffies;
-	unsigned int bucket;
-
-recalc:
-	if (jiffies_since_last_check > IDLE_CALC_LIMIT) {
-		use_apm_idle = 0;
-		last_jiffies = jiffies;
-		last_stime = current->stime;
-	} else if (jiffies_since_last_check > idle_period) {
-		unsigned int idle_percentage;
-
-		idle_percentage = current->stime - last_stime;
-		idle_percentage *= 100;
-		idle_percentage /= jiffies_since_last_check;
-		use_apm_idle = (idle_percentage > idle_threshold);
-		if (apm_info.forbid_idle)
-			use_apm_idle = 0;
-		last_jiffies = jiffies;
-		last_stime = current->stime;
-	}
-
-	bucket = IDLE_LEAKY_MAX;
-
-	while (!need_resched()) {
-		if (use_apm_idle) {
-			unsigned int t;
-
-			t = jiffies;
-			switch (apm_do_idle()) {
-			case 0: apm_idle_done = 1;
-				if (t != jiffies) {
-					if (bucket) {
-						bucket = IDLE_LEAKY_MAX;
-						continue;
-					}
-				} else if (bucket) {
-					bucket--;
-					continue;
-				}
-				break;
-			case 1: apm_idle_done = 1;
-				break;
-			default: /* BIOS refused */
-				break;
-			}
-		}
-		if (original_pm_idle)
-			original_pm_idle();
-		else
-			default_idle();
-		jiffies_since_last_check = jiffies - last_jiffies;
-		if (jiffies_since_last_check > idle_period)
-			goto recalc;
-	}
-
-	if (apm_idle_done)
-		apm_do_busy();
-}
-
-/**
- *	apm_power_off	-	ask the BIOS to power off
- *
- *	Handle the power off sequence. This is the one piece of code we
- *	will execute even on SMP machines. In order to deal with BIOS
- *	bugs we support real mode APM BIOS power off calls. We also make
- *	the SMP call on CPU0 as some systems will only honour this call
- *	on their first cpu.
- */
- 
-static void apm_power_off(void)
-{
-	unsigned char	po_bios_call[] = {
-		0xb8, 0x00, 0x10,	/* movw  $0x1000,ax  */
-		0x8e, 0xd0,		/* movw  ax,ss       */
-		0xbc, 0x00, 0xf0,	/* movw  $0xf000,sp  */
-		0xb8, 0x07, 0x53,	/* movw  $0x5307,ax  */
-		0xbb, 0x01, 0x00,	/* movw  $0x0001,bx  */
-		0xb9, 0x03, 0x00,	/* movw  $0x0003,cx  */
-		0xcd, 0x15		/* int   $0x15       */
-	};
-
-	/* Some bioses don't like being called from CPU != 0 */
-	if (apm_info.realmode_power_off)
-	{
-		(void)apm_save_cpus();
-		machine_real_restart(po_bios_call, sizeof(po_bios_call));
-	}
-	else
-		(void) set_system_power_state(APM_STATE_OFF);
-}
-
-#ifdef CONFIG_APM_DO_ENABLE
-
-/**
- *	apm_enable_power_management - enable BIOS APM power management
- *	@enable: enable yes/no
- *
- *	Enable or disable the APM BIOS power services. 
- */
- 
-static int apm_enable_power_management(int enable)
-{
-	u32	eax;
-
-	if ((enable == 0) && (apm_info.bios.flags & APM_BIOS_DISENGAGED))
-		return APM_NOT_ENGAGED;
-	if (apm_bios_call_simple(APM_FUNC_ENABLE_PM, APM_DEVICE_BALL,
-			enable, &eax))
-		return (eax >> 8) & 0xff;
-	if (enable)
-		apm_info.bios.flags &= ~APM_BIOS_DISABLED;
-	else
-		apm_info.bios.flags |= APM_BIOS_DISABLED;
-	return APM_SUCCESS;
-}
-#endif
-
-/**
- *	apm_get_power_status	-	get current power state
- *	@status: returned status
- *	@bat: battery info
- *	@life: estimated life
- *
- *	Obtain the current power status from the APM BIOS. We return a
- *	status which gives the rough battery status, and current power
- *	source. The bat value returned give an estimate as a percentage
- *	of life and a status value for the battery. The estimated life
- *	if reported is a lifetime in secodnds/minutes at current powwer
- *	consumption.
- */
- 
-static int apm_get_power_status(u_short *status, u_short *bat, u_short *life)
-{
-	u32	eax;
-	u32	ebx;
-	u32	ecx;
-	u32	edx;
-	u32	dummy;
-
-	if (apm_info.get_power_status_broken)
-		return APM_32_UNSUPPORTED;
-	if (apm_bios_call(APM_FUNC_GET_STATUS, APM_DEVICE_ALL, 0,
-			&eax, &ebx, &ecx, &edx, &dummy))
-		return (eax >> 8) & 0xff;
-	*status = ebx;
-	*bat = ecx;
-	if (apm_info.get_power_status_swabinminutes) {
-		*life = swab16((u16)edx);
-		*life |= 0x8000;
-	} else
-		*life = edx;
-	return APM_SUCCESS;
-}
-
-#if 0
-static int apm_get_battery_status(u_short which, u_short *status,
-				  u_short *bat, u_short *life, u_short *nbat)
-{
-	u32	eax;
-	u32	ebx;
-	u32	ecx;
-	u32	edx;
-	u32	esi;
-
-	if (apm_info.connection_version < 0x0102) {
-		/* pretend we only have one battery. */
-		if (which != 1)
-			return APM_BAD_DEVICE;
-		*nbat = 1;
-		return apm_get_power_status(status, bat, life);
-	}
-
-	if (apm_bios_call(APM_FUNC_GET_STATUS, (0x8000 | (which)), 0, &eax,
-			&ebx, &ecx, &edx, &esi))
-		return (eax >> 8) & 0xff;
-	*status = ebx;
-	*bat = ecx;
-	*life = edx;
-	*nbat = esi;
-	return APM_SUCCESS;
-}
-#endif
-
-/**
- *	apm_engage_power_management	-	enable PM on a device
- *	@device: identity of device
- *	@enable: on/off
- *
- *	Activate or deactive power management on either a specific device
- *	or the entire system (%APM_DEVICE_ALL).
- */
- 
-static int apm_engage_power_management(u_short device, int enable)
-{
-	u32	eax;
-
-	if ((enable == 0) && (device == APM_DEVICE_ALL)
-	    && (apm_info.bios.flags & APM_BIOS_DISABLED))
-		return APM_DISABLED;
-	if (apm_bios_call_simple(APM_FUNC_ENGAGE_PM, device, enable, &eax))
-		return (eax >> 8) & 0xff;
-	if (device == APM_DEVICE_ALL) {
-		if (enable)
-			apm_info.bios.flags &= ~APM_BIOS_DISENGAGED;
-		else
-			apm_info.bios.flags |= APM_BIOS_DISENGAGED;
-	}
-	return APM_SUCCESS;
-}
-
-#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
-
-/**
- *	apm_console_blank	-	blank the display
- *	@blank: on/off
- *
- *	Attempt to blank the console, firstly by blanking just video device
- *	zero, and if that fails (some BIOSes don't support it) then it blanks
- *	all video devices. Typically the BIOS will do laptop backlight and
- *	monitor powerdown for us.
- */
- 
-static int apm_console_blank(int blank)
-{
-	int error = APM_NOT_ENGAGED; /* silence gcc */
-	int i;
-	u_short state;
-	static const u_short dev[3] = { 0x100, 0x1FF, 0x101 };
-
-	state = blank ? APM_STATE_STANDBY : APM_STATE_READY;
-
-	for (i = 0; i < ARRAY_SIZE(dev); i++) {
-		error = set_power_state(dev[i], state);
-
-		if ((error == APM_SUCCESS) || (error == APM_NO_ERROR))
-			return 1;
-
-		if (error == APM_NOT_ENGAGED)
-			break;
-	}
-
-	if (error == APM_NOT_ENGAGED) {
-		static int tried;
-		int eng_error;
-		if (tried++ == 0) {
-			eng_error = apm_engage_power_management(APM_DEVICE_ALL, 1);
-			if (eng_error) {
-				apm_error("set display", error);
-				apm_error("engage interface", eng_error);
-				return 0;
-			} else
-				return apm_console_blank(blank);
-		}
-	}
-	apm_error("set display", error);
-	return 0;
-}
-#endif
-
-static int queue_empty(struct apm_user *as)
-{
-	return as->event_head == as->event_tail;
-}
-
-static apm_event_t get_queued_event(struct apm_user *as)
-{
-	if (++as->event_tail >= APM_MAX_EVENTS)
-		as->event_tail = 0;
-	return as->events[as->event_tail];
-}
-
-static void queue_event(apm_event_t event, struct apm_user *sender)
-{
-	struct apm_user *	as;
-
-	spin_lock(&user_list_lock);
-	if (user_list == NULL)
-		goto out;
-	for (as = user_list; as != NULL; as = as->next) {
-		if ((as == sender) || (!as->reader))
-			continue;
-		if (++as->event_head >= APM_MAX_EVENTS)
-			as->event_head = 0;
-
-		if (as->event_head == as->event_tail) {
-			static int notified;
-
-			if (notified++ == 0)
-			    printk(KERN_ERR "apm: an event queue overflowed\n");
-			if (++as->event_tail >= APM_MAX_EVENTS)
-				as->event_tail = 0;
-		}
-		as->events[as->event_head] = event;
-		if ((!as->suser) || (!as->writer))
-			continue;
-		switch (event) {
-		case APM_SYS_SUSPEND:
-		case APM_USER_SUSPEND:
-			as->suspends_pending++;
-			suspends_pending++;
-			break;
-
-		case APM_SYS_STANDBY:
-		case APM_USER_STANDBY:
-			as->standbys_pending++;
-			standbys_pending++;
-			break;
-		}
-	}
-	wake_up_interruptible(&apm_waitqueue);
-out:
-	spin_unlock(&user_list_lock);
-}
-
-static void reinit_timer(void)
-{
-#ifdef INIT_TIMER_AFTER_SUSPEND
-	unsigned long flags;
-
-	spin_lock_irqsave(&i8253_lock, flags);
-	/* set the clock to HZ */
-	outb_p(0x34, PIT_MODE);		/* binary, mode 2, LSB/MSB, ch 0 */
-	udelay(10);
-	outb_p(LATCH & 0xff, PIT_CH0);	/* LSB */
-	udelay(10);
-	outb(LATCH >> 8, PIT_CH0);	/* MSB */
-	udelay(10);
-	spin_unlock_irqrestore(&i8253_lock, flags);
-#endif
-}
-
-static int suspend(int vetoable)
-{
-	int		err;
-	struct apm_user	*as;
-
-	if (pm_send_all(PM_SUSPEND, (void *)3)) {
-		/* Vetoed */
-		if (vetoable) {
-			if (apm_info.connection_version > 0x100)
-				set_system_power_state(APM_STATE_REJECT);
-			err = -EBUSY;
-			ignore_sys_suspend = 0;
-			printk(KERN_WARNING "apm: suspend was vetoed.\n");
-			goto out;
-		}
-		printk(KERN_CRIT "apm: suspend was vetoed, but suspending anyway.\n");
-	}
-
-	device_suspend(PMSG_SUSPEND);
-	local_irq_disable();
-	device_power_down(PMSG_SUSPEND);
-
-	local_irq_enable();
-
-	save_processor_state();
-	err = set_system_power_state(APM_STATE_SUSPEND);
-	ignore_normal_resume = 1;
-	restore_processor_state();
-
-	local_irq_disable();
-	reinit_timer();
-
-	if (err == APM_NO_ERROR)
-		err = APM_SUCCESS;
-	if (err != APM_SUCCESS)
-		apm_error("suspend", err);
-	err = (err == APM_SUCCESS) ? 0 : -EIO;
-	device_power_up();
-	local_irq_enable();
-	device_resume();
-	pm_send_all(PM_RESUME, (void *)0);
-	queue_event(APM_NORMAL_RESUME, NULL);
- out:
-	spin_lock(&user_list_lock);
-	for (as = user_list; as != NULL; as = as->next) {
-		as->suspend_wait = 0;
-		as->suspend_result = err;
-	}
-	spin_unlock(&user_list_lock);
-	wake_up_interruptible(&apm_suspend_waitqueue);
-	return err;
-}
-
-static void standby(void)
-{
-	int	err;
-
-	local_irq_disable();
-	device_power_down(PMSG_SUSPEND);
-	local_irq_enable();
-
-	err = set_system_power_state(APM_STATE_STANDBY);
-	if ((err != APM_SUCCESS) && (err != APM_NO_ERROR))
-		apm_error("standby", err);
-
-	local_irq_disable();
-	device_power_up();
-	local_irq_enable();
-}
-
-static apm_event_t get_event(void)
-{
-	int		error;
-	apm_event_t	event = APM_NO_EVENTS; /* silence gcc */
-	apm_eventinfo_t	info;
-
-	static int notified;
-
-	/* we don't use the eventinfo */
-	error = apm_get_event(&event, &info);
-	if (error == APM_SUCCESS)
-		return event;
-
-	if ((error != APM_NO_EVENTS) && (notified++ == 0))
-		apm_error("get_event", error);
-
-	return 0;
-}
-
-static void check_events(void)
-{
-	apm_event_t		event;
-	static unsigned long	last_resume;
-	static int		ignore_bounce;
-
-	while ((event = get_event()) != 0) {
-		if (debug) {
-			if (event <= NR_APM_EVENT_NAME)
-				printk(KERN_DEBUG "apm: received %s notify\n",
-				       apm_event_name[event - 1]);
-			else
-				printk(KERN_DEBUG "apm: received unknown "
-				       "event 0x%02x\n", event);
-		}
-		if (ignore_bounce
-		    && ((jiffies - last_resume) > bounce_interval))
-			ignore_bounce = 0;
-
-		switch (event) {
-		case APM_SYS_STANDBY:
-		case APM_USER_STANDBY:
-			queue_event(event, NULL);
-			if (standbys_pending <= 0)
-				standby();
-			break;
-
-		case APM_USER_SUSPEND:
-#ifdef CONFIG_APM_IGNORE_USER_SUSPEND
-			if (apm_info.connection_version > 0x100)
-				set_system_power_state(APM_STATE_REJECT);
-			break;
-#endif
-		case APM_SYS_SUSPEND:
-			if (ignore_bounce) {
-				if (apm_info.connection_version > 0x100)
-					set_system_power_state(APM_STATE_REJECT);
-				break;
-			}
-			/*
-			 * If we are already processing a SUSPEND,
-			 * then further SUSPEND events from the BIOS
-			 * will be ignored.  We also return here to
-			 * cope with the fact that the Thinkpads keep
-			 * sending a SUSPEND event until something else
-			 * happens!
-			 */
-			if (ignore_sys_suspend)
-				return;
-			ignore_sys_suspend = 1;
-			queue_event(event, NULL);
-			if (suspends_pending <= 0)
-				(void) suspend(1);
-			break;
-
-		case APM_NORMAL_RESUME:
-		case APM_CRITICAL_RESUME:
-		case APM_STANDBY_RESUME:
-			ignore_sys_suspend = 0;
-			last_resume = jiffies;
-			ignore_bounce = 1;
-			if ((event != APM_NORMAL_RESUME)
-			    || (ignore_normal_resume == 0)) {
-				device_resume();
-				pm_send_all(PM_RESUME, (void *)0);
-				queue_event(event, NULL);
-			}
-			ignore_normal_resume = 0;
-			break;
-
-		case APM_CAPABILITY_CHANGE:
-		case APM_LOW_BATTERY:
-		case APM_POWER_STATUS_CHANGE:
-			queue_event(event, NULL);
-			/* If needed, notify drivers here */
-			break;
-
-		case APM_UPDATE_TIME:
-			break;
-
-		case APM_CRITICAL_SUSPEND:
-			/*
-			 * We are not allowed to reject a critical suspend.
-			 */
-			(void) suspend(0);
-			break;
-		}
-	}
-}
-
-static void apm_event_handler(void)
-{
-	static int	pending_count = 4;
-	int		err;
-
-	if ((standbys_pending > 0) || (suspends_pending > 0)) {
-		if ((apm_info.connection_version > 0x100) &&
-				(pending_count-- <= 0)) {
-			pending_count = 4;
-			if (debug)
-				printk(KERN_DEBUG "apm: setting state busy\n");
-			err = set_system_power_state(APM_STATE_BUSY);
-			if (err)
-				apm_error("busy", err);
-		}
-	} else
-		pending_count = 4;
-	check_events();
-}
-
-/*
- * This is the APM thread main loop.
- */
-
-static void apm_mainloop(void)
-{
-	DECLARE_WAITQUEUE(wait, current);
-
-	add_wait_queue(&apm_waitqueue, &wait);
-	set_current_state(TASK_INTERRUPTIBLE);
-	for (;;) {
-		schedule_timeout(APM_CHECK_TIMEOUT);
-		if (kthread_should_stop())
-			break;
-		/*
-		 * Ok, check all events, check for idle (and mark us sleeping
-		 * so as not to count towards the load average)..
-		 */
-		set_current_state(TASK_INTERRUPTIBLE);
-		apm_event_handler();
-	}
-	remove_wait_queue(&apm_waitqueue, &wait);
-}
-
-static int check_apm_user(struct apm_user *as, const char *func)
-{
-	if ((as == NULL) || (as->magic != APM_BIOS_MAGIC)) {
-		printk(KERN_ERR "apm: %s passed bad filp\n", func);
-		return 1;
-	}
-	return 0;
-}
-
-static ssize_t do_read(struct file *fp, char __user *buf, size_t count, loff_t *ppos)
-{
-	struct apm_user *	as;
-	int			i;
-	apm_event_t		event;
-
-	as = fp->private_data;
-	if (check_apm_user(as, "read"))
-		return -EIO;
-	if ((int)count < sizeof(apm_event_t))
-		return -EINVAL;
-	if ((queue_empty(as)) && (fp->f_flags & O_NONBLOCK))
-		return -EAGAIN;
-	wait_event_interruptible(apm_waitqueue, !queue_empty(as));
-	i = count;
-	while ((i >= sizeof(event)) && !queue_empty(as)) {
-		event = get_queued_event(as);
-		if (copy_to_user(buf, &event, sizeof(event))) {
-			if (i < count)
-				break;
-			return -EFAULT;
-		}
-		switch (event) {
-		case APM_SYS_SUSPEND:
-		case APM_USER_SUSPEND:
-			as->suspends_read++;
-			break;
-
-		case APM_SYS_STANDBY:
-		case APM_USER_STANDBY:
-			as->standbys_read++;
-			break;
-		}
-		buf += sizeof(event);
-		i -= sizeof(event);
-	}
-	if (i < count)
-		return count - i;
-	if (signal_pending(current))
-		return -ERESTARTSYS;
-	return 0;
-}
-
-static unsigned int do_poll(struct file *fp, poll_table * wait)
-{
-	struct apm_user * as;
-
-	as = fp->private_data;
-	if (check_apm_user(as, "poll"))
-		return 0;
-	poll_wait(fp, &apm_waitqueue, wait);
-	if (!queue_empty(as))
-		return POLLIN | POLLRDNORM;
-	return 0;
-}
-
-static int do_ioctl(struct inode * inode, struct file *filp,
-		    u_int cmd, u_long arg)
-{
-	struct apm_user *	as;
-
-	as = filp->private_data;
-	if (check_apm_user(as, "ioctl"))
-		return -EIO;
-	if ((!as->suser) || (!as->writer))
-		return -EPERM;
-	switch (cmd) {
-	case APM_IOC_STANDBY:
-		if (as->standbys_read > 0) {
-			as->standbys_read--;
-			as->standbys_pending--;
-			standbys_pending--;
-		} else
-			queue_event(APM_USER_STANDBY, as);
-		if (standbys_pending <= 0)
-			standby();
-		break;
-	case APM_IOC_SUSPEND:
-		if (as->suspends_read > 0) {
-			as->suspends_read--;
-			as->suspends_pending--;
-			suspends_pending--;
-		} else
-			queue_event(APM_USER_SUSPEND, as);
-		if (suspends_pending <= 0) {
-			return suspend(1);
-		} else {
-			as->suspend_wait = 1;
-			wait_event_interruptible(apm_suspend_waitqueue,
-					as->suspend_wait == 0);
-			return as->suspend_result;
-		}
-		break;
-	default:
-		return -EINVAL;
-	}
-	return 0;
-}
-
-static int do_release(struct inode * inode, struct file * filp)
-{
-	struct apm_user *	as;
-
-	as = filp->private_data;
-	if (check_apm_user(as, "release"))
-		return 0;
-	filp->private_data = NULL;
-	if (as->standbys_pending > 0) {
-		standbys_pending -= as->standbys_pending;
-		if (standbys_pending <= 0)
-			standby();
-	}
-	if (as->suspends_pending > 0) {
-		suspends_pending -= as->suspends_pending;
-		if (suspends_pending <= 0)
-			(void) suspend(1);
-	}
-  	spin_lock(&user_list_lock);
-	if (user_list == as)
-		user_list = as->next;
-	else {
-		struct apm_user *	as1;
-
-		for (as1 = user_list;
-		     (as1 != NULL) && (as1->next != as);
-		     as1 = as1->next)
-			;
-		if (as1 == NULL)
-			printk(KERN_ERR "apm: filp not in user list\n");
-		else
-			as1->next = as->next;
-	}
-	spin_unlock(&user_list_lock);
-	kfree(as);
-	return 0;
-}
-
-static int do_open(struct inode * inode, struct file * filp)
-{
-	struct apm_user *	as;
-
-	as = kmalloc(sizeof(*as), GFP_KERNEL);
-	if (as == NULL) {
-		printk(KERN_ERR "apm: cannot allocate struct of size %d bytes\n",
-		       sizeof(*as));
-		return -ENOMEM;
-	}
-	as->magic = APM_BIOS_MAGIC;
-	as->event_tail = as->event_head = 0;
-	as->suspends_pending = as->standbys_pending = 0;
-	as->suspends_read = as->standbys_read = 0;
-	/*
-	 * XXX - this is a tiny bit broken, when we consider BSD
-         * process accounting. If the device is opened by root, we
-	 * instantly flag that we used superuser privs. Who knows,
-	 * we might close the device immediately without doing a
-	 * privileged operation -- cevans
-	 */
-	as->suser = capable(CAP_SYS_ADMIN);
-	as->writer = (filp->f_mode & FMODE_WRITE) == FMODE_WRITE;
-	as->reader = (filp->f_mode & FMODE_READ) == FMODE_READ;
-	spin_lock(&user_list_lock);
-	as->next = user_list;
-	user_list = as;
-	spin_unlock(&user_list_lock);
-	filp->private_data = as;
-	return 0;
-}
-
-static int proc_apm_show(struct seq_file *m, void *v)
-{
-	unsigned short	bx;
-	unsigned short	cx;
-	unsigned short	dx;
-	int		error;
-	unsigned short  ac_line_status = 0xff;
-	unsigned short  battery_status = 0xff;
-	unsigned short  battery_flag   = 0xff;
-	int		percentage     = -1;
-	int             time_units     = -1;
-	char            *units         = "?";
-
-	if ((num_online_cpus() == 1) &&
-	    !(error = apm_get_power_status(&bx, &cx, &dx))) {
-		ac_line_status = (bx >> 8) & 0xff;
-		battery_status = bx & 0xff;
-		if ((cx & 0xff) != 0xff)
-			percentage = cx & 0xff;
-
-		if (apm_info.connection_version > 0x100) {
-			battery_flag = (cx >> 8) & 0xff;
-			if (dx != 0xffff) {
-				units = (dx & 0x8000) ? "min" : "sec";
-				time_units = dx & 0x7fff;
-			}
-		}
-	}
-	/* Arguments, with symbols from linux/apm_bios.h.  Information is
-	   from the Get Power Status (0x0a) call unless otherwise noted.
-
-	   0) Linux driver version (this will change if format changes)
-	   1) APM BIOS Version.  Usually 1.0, 1.1 or 1.2.
-	   2) APM flags from APM Installation Check (0x00):
-	      bit 0: APM_16_BIT_SUPPORT
-	      bit 1: APM_32_BIT_SUPPORT
-	      bit 2: APM_IDLE_SLOWS_CLOCK
-	      bit 3: APM_BIOS_DISABLED
-	      bit 4: APM_BIOS_DISENGAGED
-	   3) AC line status
-	      0x00: Off-line
-	      0x01: On-line
-	      0x02: On backup power (BIOS >= 1.1 only)
-	      0xff: Unknown
-	   4) Battery status
-	      0x00: High
-	      0x01: Low
-	      0x02: Critical
-	      0x03: Charging
-	      0x04: Selected battery not present (BIOS >= 1.2 only)
-	      0xff: Unknown
-	   5) Battery flag
-	      bit 0: High
-	      bit 1: Low
-	      bit 2: Critical
-	      bit 3: Charging
-	      bit 7: No system battery
-	      0xff: Unknown
-	   6) Remaining battery life (percentage of charge):
-	      0-100: valid
-	      -1: Unknown
-	   7) Remaining battery life (time units):
-	      Number of remaining minutes or seconds
-	      -1: Unknown
-	   8) min = minutes; sec = seconds */
-
-	seq_printf(m, "%s %d.%d 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
-		     driver_version,
-		     (apm_info.bios.version >> 8) & 0xff,
-		     apm_info.bios.version & 0xff,
-		     apm_info.bios.flags,
-		     ac_line_status,
-		     battery_status,
-		     battery_flag,
-		     percentage,
-		     time_units,
-		     units);
-	return 0;
-}
-
-static int proc_apm_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, proc_apm_show, NULL);
-}
-
-static const struct file_operations apm_file_ops = {
-	.owner		= THIS_MODULE,
-	.open		= proc_apm_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-static int apm(void *unused)
-{
-	unsigned short	bx;
-	unsigned short	cx;
-	unsigned short	dx;
-	int		error;
-	char *		power_stat;
-	char *		bat_stat;
-
-#ifdef CONFIG_SMP
-	/* 2002/08/01 - WT
-	 * This is to avoid random crashes at boot time during initialization
-	 * on SMP systems in case of "apm=power-off" mode. Seen on ASUS A7M266D.
-	 * Some bioses don't like being called from CPU != 0.
-	 * Method suggested by Ingo Molnar.
-	 */
-	set_cpus_allowed(current, cpumask_of_cpu(0));
-	BUG_ON(smp_processor_id() != 0);
-#endif
-
-	if (apm_info.connection_version == 0) {
-		apm_info.connection_version = apm_info.bios.version;
-		if (apm_info.connection_version > 0x100) {
-			/*
-			 * We only support BIOSs up to version 1.2
-			 */
-			if (apm_info.connection_version > 0x0102)
-				apm_info.connection_version = 0x0102;
-			error = apm_driver_version(&apm_info.connection_version);
-			if (error != APM_SUCCESS) {
-				apm_error("driver version", error);
-				/* Fall back to an APM 1.0 connection. */
-				apm_info.connection_version = 0x100;
-			}
-		}
-	}
-
-	if (debug)
-		printk(KERN_INFO "apm: Connection version %d.%d\n",
-			(apm_info.connection_version >> 8) & 0xff,
-			apm_info.connection_version & 0xff);
-
-#ifdef CONFIG_APM_DO_ENABLE
-	if (apm_info.bios.flags & APM_BIOS_DISABLED) {
-		/*
-		 * This call causes my NEC UltraLite Versa 33/C to hang if it
-		 * is booted with PM disabled but not in the docking station.
-		 * Unfortunate ...
-		 */
-		error = apm_enable_power_management(1);
-		if (error) {
-			apm_error("enable power management", error);
-			return -1;
-		}
-	}
-#endif
-
-	if ((apm_info.bios.flags & APM_BIOS_DISENGAGED)
-	    && (apm_info.connection_version > 0x0100)) {
-		error = apm_engage_power_management(APM_DEVICE_ALL, 1);
-		if (error) {
-			apm_error("engage power management", error);
-			return -1;
-		}
-	}
-
-	if (debug && (num_online_cpus() == 1 || smp )) {
-		error = apm_get_power_status(&bx, &cx, &dx);
-		if (error)
-			printk(KERN_INFO "apm: power status not available\n");
-		else {
-			switch ((bx >> 8) & 0xff) {
-			case 0: power_stat = "off line"; break;
-			case 1: power_stat = "on line"; break;
-			case 2: power_stat = "on backup power"; break;
-			default: power_stat = "unknown"; break;
-			}
-			switch (bx & 0xff) {
-			case 0: bat_stat = "high"; break;
-			case 1: bat_stat = "low"; break;
-			case 2: bat_stat = "critical"; break;
-			case 3: bat_stat = "charging"; break;
-			default: bat_stat = "unknown"; break;
-			}
-			printk(KERN_INFO
-			       "apm: AC %s, battery status %s, battery life ",
-			       power_stat, bat_stat);
-			if ((cx & 0xff) == 0xff)
-				printk("unknown\n");
-			else
-				printk("%d%%\n", cx & 0xff);
-			if (apm_info.connection_version > 0x100) {
-				printk(KERN_INFO
-				       "apm: battery flag 0x%02x, battery life ",
-				       (cx >> 8) & 0xff);
-				if (dx == 0xffff)
-					printk("unknown\n");
-				else
-					printk("%d %s\n", dx & 0x7fff,
-						(dx & 0x8000) ?
-						"minutes" : "seconds");
-			}
-		}
-	}
-
-	/* Install our power off handler.. */
-	if (power_off)
-		pm_power_off = apm_power_off;
-
-	if (num_online_cpus() == 1 || smp) {
-#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
-		console_blank_hook = apm_console_blank;
-#endif
-		apm_mainloop();
-#if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT)
-		console_blank_hook = NULL;
-#endif
-	}
-
-	return 0;
-}
-
-#ifndef MODULE
-static int __init apm_setup(char *str)
-{
-	int	invert;
-
-	while ((str != NULL) && (*str != '\0')) {
-		if (strncmp(str, "off", 3) == 0)
-			apm_disabled = 1;
-		if (strncmp(str, "on", 2) == 0)
-			apm_disabled = 0;
-		if ((strncmp(str, "bounce-interval=", 16) == 0) ||
-		    (strncmp(str, "bounce_interval=", 16) == 0))
-			bounce_interval = simple_strtol(str + 16, NULL, 0);
-		if ((strncmp(str, "idle-threshold=", 15) == 0) ||
-		    (strncmp(str, "idle_threshold=", 15) == 0))
-			idle_threshold = simple_strtol(str + 15, NULL, 0);
-		if ((strncmp(str, "idle-period=", 12) == 0) ||
-		    (strncmp(str, "idle_period=", 12) == 0))
-			idle_period = simple_strtol(str + 12, NULL, 0);
-		invert = (strncmp(str, "no-", 3) == 0) ||
-			(strncmp(str, "no_", 3) == 0);
-		if (invert)
-			str += 3;
-		if (strncmp(str, "debug", 5) == 0)
-			debug = !invert;
-		if ((strncmp(str, "power-off", 9) == 0) ||
-		    (strncmp(str, "power_off", 9) == 0))
-			power_off = !invert;
-		if (strncmp(str, "smp", 3) == 0)
-		{
-			smp = !invert;
-			idle_threshold = 100;
-		}
-		if ((strncmp(str, "allow-ints", 10) == 0) ||
-		    (strncmp(str, "allow_ints", 10) == 0))
- 			apm_info.allow_ints = !invert;
-		if ((strncmp(str, "broken-psr", 10) == 0) ||
-		    (strncmp(str, "broken_psr", 10) == 0))
-			apm_info.get_power_status_broken = !invert;
-		if ((strncmp(str, "realmode-power-off", 18) == 0) ||
-		    (strncmp(str, "realmode_power_off", 18) == 0))
-			apm_info.realmode_power_off = !invert;
-		str = strchr(str, ',');
-		if (str != NULL)
-			str += strspn(str, ", \t");
-	}
-	return 1;
-}
-
-__setup("apm=", apm_setup);
-#endif
-
-static const struct file_operations apm_bios_fops = {
-	.owner		= THIS_MODULE,
-	.read		= do_read,
-	.poll		= do_poll,
-	.ioctl		= do_ioctl,
-	.open		= do_open,
-	.release	= do_release,
-};
-
-static struct miscdevice apm_device = {
-	APM_MINOR_DEV,
-	"apm_bios",
-	&apm_bios_fops
-};
-
-
-/* Simple "print if true" callback */
-static int __init print_if_true(struct dmi_system_id *d)
-{
-	printk("%s\n", d->ident);
-	return 0;
-}
-
-/*
- * Some Bioses enable the PS/2 mouse (touchpad) at resume, even if it was
- * disabled before the suspend. Linux used to get terribly confused by that.
- */
-static int __init broken_ps2_resume(struct dmi_system_id *d)
-{
-	printk(KERN_INFO "%s machine detected. Mousepad Resume Bug workaround hopefully not needed.\n", d->ident);
-	return 0;
-}
-
-/* Some bioses have a broken protected mode poweroff and need to use realmode */
-static int __init set_realmode_power_off(struct dmi_system_id *d)
-{
-	if (apm_info.realmode_power_off == 0) {
-		apm_info.realmode_power_off = 1;
-		printk(KERN_INFO "%s bios detected. Using realmode poweroff only.\n", d->ident);
-	}
-	return 0;
-}
-
-/* Some laptops require interrupts to be enabled during APM calls */
-static int __init set_apm_ints(struct dmi_system_id *d)
-{
-	if (apm_info.allow_ints == 0) {
-		apm_info.allow_ints = 1;
-		printk(KERN_INFO "%s machine detected. Enabling interrupts during APM calls.\n", d->ident);
-	}
-	return 0;
-}
-
-/* Some APM bioses corrupt memory or just plain do not work */
-static int __init apm_is_horked(struct dmi_system_id *d)
-{
-	if (apm_info.disabled == 0) {
-		apm_info.disabled = 1;
-		printk(KERN_INFO "%s machine detected. Disabling APM.\n", d->ident);
-	}
-	return 0;
-}
-
-static int __init apm_is_horked_d850md(struct dmi_system_id *d)
-{
-	if (apm_info.disabled == 0) {
-		apm_info.disabled = 1;
-		printk(KERN_INFO "%s machine detected. Disabling APM.\n", d->ident);
-		printk(KERN_INFO "This bug is fixed in bios P15 which is available for \n");
-		printk(KERN_INFO "download from support.intel.com \n");
-	}
-	return 0;
-}
-
-/* Some APM bioses hang on APM idle calls */
-static int __init apm_likes_to_melt(struct dmi_system_id *d)
-{
-	if (apm_info.forbid_idle == 0) {
-		apm_info.forbid_idle = 1;
-		printk(KERN_INFO "%s machine detected. Disabling APM idle calls.\n", d->ident);
-	}
-	return 0;
-}
-
-/*
- *  Check for clue free BIOS implementations who use
- *  the following QA technique
- *
- *      [ Write BIOS Code ]<------
- *               |                ^
- *      < Does it Compile >----N--
- *               |Y               ^
- *	< Does it Boot Win98 >-N--
- *               |Y
- *           [Ship It]
- *
- *	Phoenix A04  08/24/2000 is known bad (Dell Inspiron 5000e)
- *	Phoenix A07  09/29/2000 is known good (Dell Inspiron 5000)
- */
-static int __init broken_apm_power(struct dmi_system_id *d)
-{
-	apm_info.get_power_status_broken = 1;
-	printk(KERN_WARNING "BIOS strings suggest APM bugs, disabling power status reporting.\n");
-	return 0;
-}
-
-/*
- * This bios swaps the APM minute reporting bytes over (Many sony laptops
- * have this problem).
- */
-static int __init swab_apm_power_in_minutes(struct dmi_system_id *d)
-{
-	apm_info.get_power_status_swabinminutes = 1;
-	printk(KERN_WARNING "BIOS strings suggest APM reports battery life in minutes and wrong byte order.\n");
-	return 0;
-}
-
-static struct dmi_system_id __initdata apm_dmi_table[] = {
-	{
-		print_if_true,
-		KERN_WARNING "IBM T23 - BIOS 1.03b+ and controller firmware 1.02+ may be needed for Linux APM.",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
-			DMI_MATCH(DMI_BIOS_VERSION, "1AET38WW (1.01b)"), },
-	},
-	{	/* Handle problems with APM on the C600 */
-		broken_ps2_resume, "Dell Latitude C600",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "Dell"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "Latitude C600"), },
-	},
-	{	/* Allow interrupts during suspend on Dell Latitude laptops*/
-		set_apm_ints, "Dell Latitude",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "Latitude C510"), }
-	},
-	{	/* APM crashes */
-		apm_is_horked, "Dell Inspiron 2500",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 2500"),
-			DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION,"A11"), },
-	},
-	{	/* Allow interrupts during suspend on Dell Inspiron laptops*/
-		set_apm_ints, "Dell Inspiron", {
-			DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 4000"), },
-	},
-	{	/* Handle problems with APM on Inspiron 5000e */
-		broken_apm_power, "Dell Inspiron 5000e",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "A04"),
-			DMI_MATCH(DMI_BIOS_DATE, "08/24/2000"), },
-	},
-	{	/* Handle problems with APM on Inspiron 2500 */
-		broken_apm_power, "Dell Inspiron 2500",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "A12"),
-			DMI_MATCH(DMI_BIOS_DATE, "02/04/2002"), },
-	},
-	{	/* APM crashes */
-		apm_is_horked, "Dell Dimension 4100",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "XPS-Z"),
-			DMI_MATCH(DMI_BIOS_VENDOR,"Intel Corp."),
-			DMI_MATCH(DMI_BIOS_VERSION,"A11"), },
-	},
-	{	/* Allow interrupts during suspend on Compaq Laptops*/
-		set_apm_ints, "Compaq 12XL125",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "Compaq PC"),
-			DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION,"4.06"), },
-	},
-	{	/* Allow interrupts during APM or the clock goes slow */
-		set_apm_ints, "ASUSTeK",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
-			DMI_MATCH(DMI_PRODUCT_NAME, "L8400K series Notebook PC"), },
-	},
-	{	/* APM blows on shutdown */
-		apm_is_horked, "ABIT KX7-333[R]",
-		{	DMI_MATCH(DMI_BOARD_VENDOR, "ABIT"),
-			DMI_MATCH(DMI_BOARD_NAME, "VT8367-8233A (KX7-333[R])"), },
-	},
-	{	/* APM crashes */
-		apm_is_horked, "Trigem Delhi3",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "TriGem Computer, Inc"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "Delhi3"), },
-	},
-	{	/* APM crashes */
-		apm_is_horked, "Fujitsu-Siemens",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "hoenix/FUJITSU SIEMENS"),
-			DMI_MATCH(DMI_BIOS_VERSION, "Version1.01"), },
-	},
-	{	/* APM crashes */
-		apm_is_horked_d850md, "Intel D850MD",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
-			DMI_MATCH(DMI_BIOS_VERSION, "MV85010A.86A.0016.P07.0201251536"), },
-	},
-	{	/* APM crashes */
-		apm_is_horked, "Intel D810EMO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
-			DMI_MATCH(DMI_BIOS_VERSION, "MO81010A.86A.0008.P04.0004170800"), },
-	},
-	{	/* APM crashes */
-		apm_is_horked, "Dell XPS-Z",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Intel Corp."),
-			DMI_MATCH(DMI_BIOS_VERSION, "A11"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "XPS-Z"), },
-	},
-	{	/* APM crashes */
-		apm_is_horked, "Sharp PC-PJ/AX",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "SHARP"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "PC-PJ/AX"),
-			DMI_MATCH(DMI_BIOS_VENDOR,"SystemSoft"),
-			DMI_MATCH(DMI_BIOS_VERSION,"Version R2.08"), },
-	},
-	{	/* APM crashes */
-		apm_is_horked, "Dell Inspiron 2500",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 2500"),
-			DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION,"A11"), },
-	},
-	{	/* APM idle hangs */
-		apm_likes_to_melt, "Jabil AMD",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
-			DMI_MATCH(DMI_BIOS_VERSION, "0AASNP06"), },
-	},
-	{	/* APM idle hangs */
-		apm_likes_to_melt, "AMI Bios",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
-			DMI_MATCH(DMI_BIOS_VERSION, "0AASNP05"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-N505X(DE) */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "R0206H"),
-			DMI_MATCH(DMI_BIOS_DATE, "08/23/99"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-N505VX */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "W2K06H0"),
-			DMI_MATCH(DMI_BIOS_DATE, "02/03/00"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-XG29 */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "R0117A0"),
-			DMI_MATCH(DMI_BIOS_DATE, "04/25/00"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-Z600NE */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "R0121Z1"),
-			DMI_MATCH(DMI_BIOS_DATE, "05/11/00"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-Z600NE */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "WME01Z1"),
-			DMI_MATCH(DMI_BIOS_DATE, "08/11/00"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-Z600LEK(DE) */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "R0206Z3"),
-			DMI_MATCH(DMI_BIOS_DATE, "12/25/00"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-Z505LS */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "R0203D0"),
-			DMI_MATCH(DMI_BIOS_DATE, "05/12/00"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-Z505LS */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "R0203Z3"),
-			DMI_MATCH(DMI_BIOS_DATE, "08/25/00"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-Z505LS (with updated BIOS) */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "R0209Z3"),
-			DMI_MATCH(DMI_BIOS_DATE, "05/12/01"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-F104K */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "R0204K2"),
-			DMI_MATCH(DMI_BIOS_DATE, "08/28/00"), },
-	},
-
-	{	/* Handle problems with APM on Sony Vaio PCG-C1VN/C1VE */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "R0208P1"),
-			DMI_MATCH(DMI_BIOS_DATE, "11/09/00"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-C1VE */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "R0204P1"),
-			DMI_MATCH(DMI_BIOS_DATE, "09/12/00"), },
-	},
-	{	/* Handle problems with APM on Sony Vaio PCG-C1VE */
-		swab_apm_power_in_minutes, "Sony VAIO",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
-			DMI_MATCH(DMI_BIOS_VERSION, "WXPO1Z3"),
-			DMI_MATCH(DMI_BIOS_DATE, "10/26/01"), },
-	},
-	{	/* broken PM poweroff bios */
-		set_realmode_power_off, "Award Software v4.60 PGMA",
-		{	DMI_MATCH(DMI_BIOS_VENDOR, "Award Software International, Inc."),
-			DMI_MATCH(DMI_BIOS_VERSION, "4.60 PGMA"),
-			DMI_MATCH(DMI_BIOS_DATE, "134526184"), },
-	},
-
-	/* Generic per vendor APM settings  */
-
-	{	/* Allow interrupts during suspend on IBM laptops */
-		set_apm_ints, "IBM",
-		{	DMI_MATCH(DMI_SYS_VENDOR, "IBM"), },
-	},
-
-	{ }
-};
-
-/*
- * Just start the APM thread. We do NOT want to do APM BIOS
- * calls from anything but the APM thread, if for no other reason
- * than the fact that we don't trust the APM BIOS. This way,
- * most common APM BIOS problems that lead to protection errors
- * etc will have at least some level of being contained...
- *
- * In short, if something bad happens, at least we have a choice
- * of just killing the apm thread..
- */
-static int __init apm_init(void)
-{
-	struct proc_dir_entry *apm_proc;
-	struct desc_struct *gdt;
-	int err;
-
-	dmi_check_system(apm_dmi_table);
-
-	if (apm_info.bios.version == 0 || paravirt_enabled()) {
-		printk(KERN_INFO "apm: BIOS not found.\n");
-		return -ENODEV;
-	}
-	printk(KERN_INFO
-		"apm: BIOS version %d.%d Flags 0x%02x (Driver version %s)\n",
-		((apm_info.bios.version >> 8) & 0xff),
-		(apm_info.bios.version & 0xff),
-		apm_info.bios.flags,
-		driver_version);
-	if ((apm_info.bios.flags & APM_32_BIT_SUPPORT) == 0) {
-		printk(KERN_INFO "apm: no 32 bit BIOS support\n");
-		return -ENODEV;
-	}
-
-	if (allow_ints)
-		apm_info.allow_ints = 1;
-	if (broken_psr)
-		apm_info.get_power_status_broken = 1;
-	if (realmode_power_off)
-		apm_info.realmode_power_off = 1;
-	/* User can override, but default is to trust DMI */
-	if (apm_disabled != -1)
-		apm_info.disabled = apm_disabled;
-
-	/*
-	 * Fix for the Compaq Contura 3/25c which reports BIOS version 0.1
-	 * but is reportedly a 1.0 BIOS.
-	 */
-	if (apm_info.bios.version == 0x001)
-		apm_info.bios.version = 0x100;
-
-	/* BIOS < 1.2 doesn't set cseg_16_len */
-	if (apm_info.bios.version < 0x102)
-		apm_info.bios.cseg_16_len = 0; /* 64k */
-
-	if (debug) {
-		printk(KERN_INFO "apm: entry %x:%x cseg16 %x dseg %x",
-			apm_info.bios.cseg, apm_info.bios.offset,
-			apm_info.bios.cseg_16, apm_info.bios.dseg);
-		if (apm_info.bios.version > 0x100)
-			printk(" cseg len %x, dseg len %x",
-				apm_info.bios.cseg_len,
-				apm_info.bios.dseg_len);
-		if (apm_info.bios.version > 0x101)
-			printk(" cseg16 len %x", apm_info.bios.cseg_16_len);
-		printk("\n");
-	}
-
-	if (apm_info.disabled) {
-		printk(KERN_NOTICE "apm: disabled on user request.\n");
-		return -ENODEV;
-	}
-	if ((num_online_cpus() > 1) && !power_off && !smp) {
-		printk(KERN_NOTICE "apm: disabled - APM is not SMP safe.\n");
-		apm_info.disabled = 1;
-		return -ENODEV;
-	}
-	if (PM_IS_ACTIVE()) {
-		printk(KERN_NOTICE "apm: overridden by ACPI.\n");
-		apm_info.disabled = 1;
-		return -ENODEV;
-	}
-#ifdef CONFIG_PM_LEGACY
-	pm_active = 1;
-#endif
-
-	/*
-	 * Set up a segment that references the real mode segment 0x40
-	 * that extends up to the end of page zero (that we have reserved).
-	 * This is for buggy BIOS's that refer to (real mode) segment 0x40
-	 * even though they are called in protected mode.
-	 */
-	set_base(bad_bios_desc, __va((unsigned long)0x40 << 4));
-	_set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4));
-
-	/*
-	 * Set up the long jump entry point to the APM BIOS, which is called
-	 * from inline assembly.
-	 */
-	apm_bios_entry.offset = apm_info.bios.offset;
-	apm_bios_entry.segment = APM_CS;
-
-	/*
-	 * The APM 1.1 BIOS is supposed to provide limit information that it
-	 * recognizes.  Many machines do this correctly, but many others do
-	 * not restrict themselves to their claimed limit.  When this happens,
-	 * they will cause a segmentation violation in the kernel at boot time.
-	 * Most BIOS's, however, will respect a 64k limit, so we use that.
-	 *
-	 * Note we only set APM segments on CPU zero, since we pin the APM
-	 * code to that CPU.
-	 */
-	gdt = get_cpu_gdt_table(0);
-	set_base(gdt[APM_CS >> 3],
-		 __va((unsigned long)apm_info.bios.cseg << 4));
-	set_base(gdt[APM_CS_16 >> 3],
-		 __va((unsigned long)apm_info.bios.cseg_16 << 4));
-	set_base(gdt[APM_DS >> 3],
-		 __va((unsigned long)apm_info.bios.dseg << 4));
-
-	apm_proc = create_proc_entry("apm", 0, NULL);
-	if (apm_proc)
-		apm_proc->proc_fops = &apm_file_ops;
-
-	kapmd_task = kthread_create(apm, NULL, "kapmd");
-	if (IS_ERR(kapmd_task)) {
-		printk(KERN_ERR "apm: disabled - Unable to start kernel "
-				"thread.\n");
-		err = PTR_ERR(kapmd_task);
-		kapmd_task = NULL;
-		remove_proc_entry("apm", NULL);
-		return err;
-	}
-	wake_up_process(kapmd_task);
-
-	if (num_online_cpus() > 1 && !smp ) {
-		printk(KERN_NOTICE
-		   "apm: disabled - APM is not SMP safe (power off active).\n");
-		return 0;
-	}
-
-	/*
-	 * Note we don't actually care if the misc_device cannot be registered.
-	 * this driver can do its job without it, even if userspace can't
-	 * control it.  just log the error
-	 */
-	if (misc_register(&apm_device))
-		printk(KERN_WARNING "apm: Could not register misc device.\n");
-
-	if (HZ != 100)
-		idle_period = (idle_period * HZ) / 100;
-	if (idle_threshold < 100) {
-		original_pm_idle = pm_idle;
-		pm_idle  = apm_cpu_idle;
-		set_pm_idle = 1;
-	}
-
-	return 0;
-}
-
-static void __exit apm_exit(void)
-{
-	int	error;
-
-	if (set_pm_idle) {
-		pm_idle = original_pm_idle;
-		/*
-		 * We are about to unload the current idle thread pm callback
-		 * (pm_idle), Wait for all processors to update cached/local
-		 * copies of pm_idle before proceeding.
-		 */
-		cpu_idle_wait();
-	}
-	if (((apm_info.bios.flags & APM_BIOS_DISENGAGED) == 0)
-	    && (apm_info.connection_version > 0x0100)) {
-		error = apm_engage_power_management(APM_DEVICE_ALL, 0);
-		if (error)
-			apm_error("disengage power management", error);
-	}
-	misc_deregister(&apm_device);
-	remove_proc_entry("apm", NULL);
-	if (power_off)
-		pm_power_off = NULL;
-	if (kapmd_task) {
-		kthread_stop(kapmd_task);
-		kapmd_task = NULL;
-	}
-#ifdef CONFIG_PM_LEGACY
-	pm_active = 0;
-#endif
-}
-
-module_init(apm_init);
-module_exit(apm_exit);
-
-MODULE_AUTHOR("Stephen Rothwell");
-MODULE_DESCRIPTION("Advanced Power Management");
-MODULE_LICENSE("GPL");
-module_param(debug, bool, 0644);
-MODULE_PARM_DESC(debug, "Enable debug mode");
-module_param(power_off, bool, 0444);
-MODULE_PARM_DESC(power_off, "Enable power off");
-module_param(bounce_interval, int, 0444);
-MODULE_PARM_DESC(bounce_interval,
-		"Set the number of ticks to ignore suspend bounces");
-module_param(allow_ints, bool, 0444);
-MODULE_PARM_DESC(allow_ints, "Allow interrupts during BIOS calls");
-module_param(broken_psr, bool, 0444);
-MODULE_PARM_DESC(broken_psr, "BIOS has a broken GetPowerStatus call");
-module_param(realmode_power_off, bool, 0444);
-MODULE_PARM_DESC(realmode_power_off,
-		"Switch to real mode before powering off");
-module_param(idle_threshold, int, 0444);
-MODULE_PARM_DESC(idle_threshold,
-	"System idle percentage above which to make APM BIOS idle calls");
-module_param(idle_period, int, 0444);
-MODULE_PARM_DESC(idle_period,
-	"Period (in sec/100) over which to caculate the idle percentage");
-module_param(smp, bool, 0444);
-MODULE_PARM_DESC(smp,
-	"Set this to enable APM use on an SMP platform. Use with caution on older systems");
-MODULE_ALIAS_MISCDEV(APM_MINOR_DEV);