@@ -618,12 +618,3 @@ Why: The original implementation of memsw feature enabled by
can also cleanup the parameter handling a bit ().
Who: Michal Hocko <mhocko@suse.cz>
-----------------------------
-
-What: CONFIG_APM
-When: 2.6.40
-Why: Microsoft deleted APM from Windows as of Vista in in 2006.
- It now seems more than safe that the latest Linux Kernel be APM-free.
- The vintage laptops supporting APM are now difficult to find,
- making it problatic to maintain this code.
-Who: Len Brown <len.brown@intel.com>
@@ -531,14 +531,6 @@ L: alsa-devel@alsa-project.org (moderated for non-subscribers)
S: Maintained
F: sound/aoa/
-APM DRIVER
-M: Stephen Rothwell <sfr@canb.auug.org.au>
-L: linux-laptop@vger.kernel.org
-W: http://www.canb.auug.org.au/~sfr/
-S: Supported
-F: arch/x86/kernel/apm_32.c
-F: include/linux/apm_bios.h
-
APPLE BCM5974 MULTITOUCH DRIVER
M: Henrik Rydberg <rydberg@euromail.se>
L: linux-input@vger.kernel.org
@@ -1720,131 +1720,6 @@ source "drivers/acpi/Kconfig"
source "drivers/sfi/Kconfig"
-config X86_APM_BOOT
- def_bool y
- depends on APM || APM_MODULE
-
-menuconfig APM
- tristate "APM (Advanced Power Management) BIOS support"
- depends on X86_32 && PM_SLEEP
- ---help---
- APM is a BIOS specification for saving power using several different
- techniques. This is mostly useful for battery powered laptops with
- APM compliant BIOSes. If you say Y here, the system time will be
- reset after a RESUME operation, the /proc/apm device will provide
- battery status information, and user-space programs will receive
- notification of APM "events" (e.g. battery status change).
-
- If you select "Y" here, you can disable actual use of the APM
- BIOS by passing the "apm=off" option to the kernel at boot time.
-
- Note that the APM support is almost completely disabled for
- machines with more than one CPU.
-
- In order to use APM, you will need supporting software. For location
- and more information, read <file:Documentation/power/pm.txt> and the
- Battery Powered Linux mini-HOWTO, available from
- <http://www.tldp.org/docs.html#howto>.
-
- This driver does not spin down disk drives (see the hdparm(8)
- manpage ("man 8 hdparm") for that), and it doesn't turn off
- VESA-compliant "green" monitors.
-
- This driver does not support the TI 4000M TravelMate and the ACER
- 486/DX4/75 because they don't have compliant BIOSes. Many "green"
- desktop machines also don't have compliant BIOSes, and this driver
- may cause those machines to panic during the boot phase.
-
- Generally, if you don't have a battery in your machine, there isn't
- much point in using this driver and you should say N. If you get
- random kernel OOPSes or reboots that don't seem to be related to
- anything, try disabling/enabling this option (or disabling/enabling
- APM in your BIOS).
-
- Some other things you should try when experiencing seemingly random,
- "weird" problems:
-
- 1) make sure that you have enough swap space and that it is
- enabled.
- 2) pass the "no-hlt" option to the kernel
- 3) switch on floating point emulation in the kernel and pass
- the "no387" option to the kernel
- 4) pass the "floppy=nodma" option to the kernel
- 5) pass the "mem=4M" option to the kernel (thereby disabling
- all but the first 4 MB of RAM)
- 6) make sure that the CPU is not over clocked.
- 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
- 8) disable the cache from your BIOS settings
- 9) install a fan for the video card or exchange video RAM
- 10) install a better fan for the CPU
- 11) exchange RAM chips
- 12) exchange the motherboard.
-
- To compile this driver as a module, choose M here: the
- module will be called apm.
-
-if APM
-
-config APM_IGNORE_USER_SUSPEND
- bool "Ignore USER SUSPEND"
- ---help---
- This option will ignore USER SUSPEND requests. On machines with a
- compliant APM BIOS, you want to say N. However, on the NEC Versa M
- series notebooks, it is necessary to say Y because of a BIOS bug.
-
-config APM_DO_ENABLE
- bool "Enable PM at boot time"
- ---help---
- Enable APM features at boot time. From page 36 of the APM BIOS
- specification: "When disabled, the APM BIOS does not automatically
- power manage devices, enter the Standby State, enter the Suspend
- State, or take power saving steps in response to CPU Idle calls."
- This driver will make CPU Idle calls when Linux is idle (unless this
- feature is turned off -- see "Do CPU IDLE calls", below). This
- should always save battery power, but more complicated APM features
- will be dependent on your BIOS implementation. You may need to turn
- this option off if your computer hangs at boot time when using APM
- support, or if it beeps continuously instead of suspending. Turn
- this off if you have a NEC UltraLite Versa 33/C or a Toshiba
- T400CDT. This is off by default since most machines do fine without
- this feature.
-
-config APM_CPU_IDLE
- bool "Make CPU Idle calls when idle"
- ---help---
- Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
- On some machines, this can activate improved power savings, such as
- a slowed CPU clock rate, when the machine is idle. These idle calls
- are made after the idle loop has run for some length of time (e.g.,
- 333 mS). On some machines, this will cause a hang at boot time or
- whenever the CPU becomes idle. (On machines with more than one CPU,
- this option does nothing.)
-
-config APM_DISPLAY_BLANK
- bool "Enable console blanking using APM"
- ---help---
- Enable console blanking using the APM. Some laptops can use this to
- turn off the LCD backlight when the screen blanker of the Linux
- virtual console blanks the screen. Note that this is only used by
- the virtual console screen blanker, and won't turn off the backlight
- when using the X Window system. This also doesn't have anything to
- do with your VESA-compliant power-saving monitor. Further, this
- option doesn't work for all laptops -- it might not turn off your
- backlight at all, or it might print a lot of errors to the console,
- especially if you are using gpm.
-
-config APM_ALLOW_INTS
- bool "Allow interrupts during APM BIOS calls"
- ---help---
- Normally we disable external interrupts while we are making calls to
- the APM BIOS as a measure to lessen the effects of a badly behaving
- BIOS implementation. The BIOS should reenable interrupts if it
- needs to. Unfortunately, some BIOSes do not -- especially those in
- many of the newer IBM Thinkpads. If you experience hangs when you
- suspend, try setting this to Y. Otherwise, say N.
-
-endif # APM
-
source "arch/x86/kernel/cpu/cpufreq/Kconfig"
source "drivers/cpuidle/Kconfig"
@@ -30,7 +30,6 @@ setup-y += a20.o bioscall.o cmdline.o copy.o cpu.o cpucheck.o
setup-y += early_serial_console.o edd.o header.o main.o mca.o memory.o
setup-y += pm.o pmjump.o printf.o regs.o string.o tty.o video.o
setup-y += video-mode.o version.o
-setup-$(CONFIG_X86_APM_BOOT) += apm.o
# The link order of the video-*.o modules can matter. In particular,
# video-vga.o *must* be listed first, followed by video-vesa.o.
deleted file mode 100644
@@ -1,75 +0,0 @@
-/* -*- linux-c -*- ------------------------------------------------------- *
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright 2007 rPath, Inc. - All Rights Reserved
- * Copyright 2009 Intel Corporation; author H. Peter Anvin
- *
- * Original APM BIOS checking by Stephen Rothwell, May 1994
- * (sfr@canb.auug.org.au)
- *
- * This file is part of the Linux kernel, and is made available under
- * the terms of the GNU General Public License version 2.
- *
- * ----------------------------------------------------------------------- */
-
-/*
- * Get APM BIOS information
- */
-
-#include "boot.h"
-
-int query_apm_bios(void)
-{
- struct biosregs ireg, oreg;
-
- /* APM BIOS installation check */
- initregs(&ireg);
- ireg.ah = 0x53;
- intcall(0x15, &ireg, &oreg);
-
- if (oreg.flags & X86_EFLAGS_CF)
- return -1; /* No APM BIOS */
-
- if (oreg.bx != 0x504d) /* "PM" signature */
- return -1;
-
- if (!(oreg.cx & 0x02)) /* 32 bits supported? */
- return -1;
-
- /* Disconnect first, just in case */
- ireg.al = 0x04;
- intcall(0x15, &ireg, NULL);
-
- /* 32-bit connect */
- ireg.al = 0x03;
- intcall(0x15, &ireg, &oreg);
-
- boot_params.apm_bios_info.cseg = oreg.ax;
- boot_params.apm_bios_info.offset = oreg.ebx;
- boot_params.apm_bios_info.cseg_16 = oreg.cx;
- boot_params.apm_bios_info.dseg = oreg.dx;
- boot_params.apm_bios_info.cseg_len = oreg.si;
- boot_params.apm_bios_info.cseg_16_len = oreg.hsi;
- boot_params.apm_bios_info.dseg_len = oreg.di;
-
- if (oreg.flags & X86_EFLAGS_CF)
- return -1;
-
- /* Redo the installation check as the 32-bit connect;
- some BIOSes return different flags this way... */
-
- ireg.al = 0x00;
- intcall(0x15, &ireg, &oreg);
-
- if ((oreg.eflags & X86_EFLAGS_CF) || oreg.bx != 0x504d) {
- /* Failure with 32-bit connect, try to disconect and ignore */
- ireg.al = 0x04;
- intcall(0x15, &ireg, NULL);
- return -1;
- }
-
- boot_params.apm_bios_info.version = oreg.ax;
- boot_params.apm_bios_info.flags = oreg.cx;
- return 0;
-}
-
@@ -160,11 +160,6 @@ void main(void)
/* Query Intel SpeedStep (IST) information */
query_ist();
- /* Query APM information */
-#if defined(CONFIG_APM) || defined(CONFIG_APM_MODULE)
- query_apm_bios();
-#endif
-
/* Query EDD information */
#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
query_edd();
@@ -3,7 +3,6 @@
#include <linux/types.h>
#include <linux/screen_info.h>
-#include <linux/apm_bios.h>
#include <linux/edd.h>
#include <asm/e820.h>
#include <asm/ist.h>
@@ -92,7 +91,7 @@ struct efi_info {
/* The so-called "zeropage" */
struct boot_params {
struct screen_info screen_info; /* 0x000 */
- struct apm_bios_info apm_bios_info; /* 0x040 */
+ __u8 _apm_pad[20]; /* 0x040 */
__u8 _pad2[4]; /* 0x054 */
__u64 tboot_addr; /* 0x058 */
struct ist_info ist_info; /* 0x060 */
@@ -63,8 +63,6 @@ obj-$(CONFIG_MCA) += mca_32.o
obj-$(CONFIG_X86_MSR) += msr.o
obj-$(CONFIG_X86_CPUID) += cpuid.o
obj-$(CONFIG_PCI) += early-quirks.o
-apm-y := apm_32.o
-obj-$(CONFIG_APM) += apm.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_SMP) += smpboot.o tsc_sync.o
obj-$(CONFIG_SMP) += setup_percpu.o
deleted file mode 100644
@@ -1,2463 +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 replacement 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@ucw.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@lxorguk.ukuu.org.uk>).
- * 1.14ac: If the BIOS says "I slowed the CPU down" then don't spin
- * calling it - instead idle. (Alan Cox <alan@lxorguk.ukuu.org.uk>)
- * 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 from
- * http://www.microsoft.com/whdc/archive/amp_12.mspx 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/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 <linux/jiffies.h>
-
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/desc.h>
-#include <asm/i8253.h>
-#include <asm/olpc.h>
-#include <asm/paravirt.h>
-#include <asm/reboot.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 <asm/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
-static int realmode_power_off;
-#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 DEFINE_MUTEX(apm_mutex);
-
-/*
- * 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.
- */
-static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092,
- (unsigned long)__va(0x400UL), PAGE_SIZE - 0x400 - 1);
-
-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. Note that this also handles (negative) kernel errors.
- */
-
-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 if (err < 0)
- printk(KERN_NOTICE "apm: %s: linux error code %i\n", str, err);
- else
- printk(KERN_NOTICE "apm: %s: unknown error code %#2.2x\n",
- str, err);
-}
-
-/*
- * 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
-
-struct apm_bios_call {
- u32 func;
- /* In and out */
- u32 ebx;
- u32 ecx;
- /* Out only */
- u32 eax;
- u32 edx;
- u32 esi;
-
- /* Error: -ENOMEM, or bits 8-15 of eax */
- int err;
-};
-
-/**
- * __apm_bios_call - Make an APM BIOS 32bit call
- * @_call: pointer to struct apm_bios_call.
- *
- * 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.
- *
- * Note: this makes the call on the current CPU.
- */
-static long __apm_bios_call(void *_call)
-{
- APM_DECL_SEGS
- unsigned long flags;
- int cpu;
- struct desc_struct save_desc_40;
- struct desc_struct *gdt;
- struct apm_bios_call *call = _call;
-
- cpu = get_cpu();
- BUG_ON(cpu != 0);
- 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(call->func, call->ebx, call->ecx,
- &call->eax, &call->ebx, &call->ecx, &call->edx,
- &call->esi);
- APM_DO_RESTORE_SEGS;
- apm_irq_restore(flags);
- gdt[0x40 / 8] = save_desc_40;
- put_cpu();
-
- return call->eax & 0xff;
-}
-
-/* Run __apm_bios_call or __apm_bios_call_simple on CPU 0 */
-static int on_cpu0(long (*fn)(void *), struct apm_bios_call *call)
-{
- int ret;
-
- /* Don't bother with work_on_cpu in the common case, so we don't
- * have to worry about OOM or overhead. */
- if (get_cpu() == 0) {
- ret = fn(call);
- put_cpu();
- } else {
- put_cpu();
- ret = work_on_cpu(0, fn, call);
- }
-
- /* work_on_cpu can fail with -ENOMEM */
- if (ret < 0)
- call->err = ret;
- else
- call->err = (call->eax >> 8) & 0xff;
-
- return ret;
-}
-
-/**
- * apm_bios_call - Make an APM BIOS 32bit call (on CPU 0)
- * @call: the apm_bios_call registers.
- *
- * If there is an error, it is returned in @call.err.
- */
-static int apm_bios_call(struct apm_bios_call *call)
-{
- return on_cpu0(__apm_bios_call, call);
-}
-
-/**
- * __apm_bios_call_simple - Make an APM BIOS 32bit call (on CPU 0)
- * @_call: pointer to struct apm_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 (it can
- * also return -ENOMEM). This is used for simpler BIOS operations.
- * This call may hold interrupts off for a long time on some laptops.
- *
- * Note: this makes the call on the current CPU.
- */
-static long __apm_bios_call_simple(void *_call)
-{
- u8 error;
- APM_DECL_SEGS
- unsigned long flags;
- int cpu;
- struct desc_struct save_desc_40;
- struct desc_struct *gdt;
- struct apm_bios_call *call = _call;
-
- cpu = get_cpu();
- BUG_ON(cpu != 0);
- 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(call->func, call->ebx, call->ecx,
- &call->eax);
- APM_DO_RESTORE_SEGS;
- apm_irq_restore(flags);
- gdt[0x40 / 8] = save_desc_40;
- put_cpu();
- return error;
-}
-
-/**
- * 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
- * @err: bits
- *
- * Make a BIOS call that returns one value only, or just status.
- * If there is an error, then the error code is returned in @err
- * 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 int apm_bios_call_simple(u32 func, u32 ebx_in, u32 ecx_in, u32 *eax,
- int *err)
-{
- struct apm_bios_call call;
- int ret;
-
- call.func = func;
- call.ebx = ebx_in;
- call.ecx = ecx_in;
-
- ret = on_cpu0(__apm_bios_call_simple, &call);
- *eax = call.eax;
- *err = call.err;
- return ret;
-}
-
-/**
- * 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;
- int err;
-
- if (apm_bios_call_simple(APM_FUNC_VERSION, 0, *val, &eax, &err))
- return err;
- *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)
-{
- struct apm_bios_call call;
-
- call.func = APM_FUNC_GET_EVENT;
- call.ebx = call.ecx = 0;
-
- if (apm_bios_call(&call))
- return call.err;
-
- *event = call.ebx;
- if (apm_info.connection_version < 0x0102)
- *info = ~0; /* indicate info not valid */
- else
- *info = call.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;
- int err;
-
- if (apm_bios_call_simple(APM_FUNC_SET_STATE, what, state, &eax, &err))
- return err;
- 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;
- int err = 0;
-
- 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, &err);
- }
- 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", err);
- 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;
- int err;
-
- if (clock_slowed || ALWAYS_CALL_BUSY) {
- (void)apm_bios_call_simple(APM_FUNC_BUSY, 0, 0, &dummy, &err);
- 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();
- local_irq_disable();
- jiffies_since_last_check = jiffies - last_jiffies;
- if (jiffies_since_last_check > idle_period)
- goto recalc;
- }
-
- if (apm_idle_done)
- apm_do_busy();
-
- local_irq_enable();
-}
-
-/**
- * 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) {
- set_cpus_allowed_ptr(current, cpumask_of(0));
- 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;
- int err;
-
- 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, &err))
- return err;
- 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)
-{
- struct apm_bios_call call;
-
- call.func = APM_FUNC_GET_STATUS;
- call.ebx = APM_DEVICE_ALL;
- call.ecx = 0;
-
- if (apm_info.get_power_status_broken)
- return APM_32_UNSUPPORTED;
- if (apm_bios_call(&call))
- return call.err;
- *status = call.ebx;
- *bat = call.ecx;
- if (apm_info.get_power_status_swabinminutes) {
- *life = swab16((u16)call.edx);
- *life |= 0x8000;
- } else
- *life = call.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;
- int err;
-
- 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, &err))
- return err;
- 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;
-
- raw_spin_lock_irqsave(&i8253_lock, flags);
- /* set the clock to HZ */
- outb_pit(0x34, PIT_MODE); /* binary, mode 2, LSB/MSB, ch 0 */
- udelay(10);
- outb_pit(LATCH & 0xff, PIT_CH0); /* LSB */
- udelay(10);
- outb_pit(LATCH >> 8, PIT_CH0); /* MSB */
- udelay(10);
- raw_spin_unlock_irqrestore(&i8253_lock, flags);
-#endif
-}
-
-static int suspend(int vetoable)
-{
- int err;
- struct apm_user *as;
-
- dpm_suspend_start(PMSG_SUSPEND);
-
- dpm_suspend_noirq(PMSG_SUSPEND);
-
- local_irq_disable();
- sysdev_suspend(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;
-
- sysdev_resume();
- local_irq_enable();
-
- dpm_resume_noirq(PMSG_RESUME);
-
- dpm_resume_end(PMSG_RESUME);
- queue_event(APM_NORMAL_RESUME, NULL);
- 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;
-
- dpm_suspend_noirq(PMSG_SUSPEND);
-
- local_irq_disable();
- sysdev_suspend(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();
- sysdev_resume();
- local_irq_enable();
-
- dpm_resume_noirq(PMSG_RESUME);
-}
-
-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
- && (time_after(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)) {
- dpm_resume_end(PMSG_RESUME);
- 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 long do_ioctl(struct file *filp, u_int cmd, u_long arg)
-{
- struct apm_user *as;
- int ret;
-
- 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:
- mutex_lock(&apm_mutex);
- 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();
- mutex_unlock(&apm_mutex);
- break;
- case APM_IOC_SUSPEND:
- mutex_lock(&apm_mutex);
- if (as->suspends_read > 0) {
- as->suspends_read--;
- as->suspends_pending--;
- suspends_pending--;
- } else
- queue_event(APM_USER_SUSPEND, as);
- if (suspends_pending <= 0) {
- ret = suspend(1);
- mutex_unlock(&apm_mutex);
- } else {
- as->suspend_wait = 1;
- mutex_unlock(&apm_mutex);
- wait_event_interruptible(apm_suspend_waitqueue,
- as->suspend_wait == 0);
- ret = as->suspend_result;
- }
- return ret;
- default:
- return -ENOTTY;
- }
- 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;
-
- /* 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_ptr(current, cpumask_of(0));
- BUG_ON(smp_processor_id() != 0);
-
- 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,
- .unlocked_ioctl = do_ioctl,
- .open = do_open,
- .release = do_release,
- .llseek = noop_llseek,
-};
-
-static struct miscdevice apm_device = {
- APM_MINOR_DEV,
- "apm_bios",
- &apm_bios_fops
-};
-
-
-/* Simple "print if true" callback */
-static int __init print_if_true(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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(const 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 desc_struct *gdt;
- int err;
-
- dmi_check_system(apm_dmi_table);
-
- if (apm_info.bios.version == 0 || paravirt_enabled() || machine_is_olpc()) {
- 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_flags & PM_ACPI) {
- printk(KERN_NOTICE "apm: overridden by ACPI.\n");
- apm_info.disabled = 1;
- return -ENODEV;
- }
- pm_flags |= PM_APM;
-
- /*
- * 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_desc_base(&gdt[APM_CS >> 3],
- (unsigned long)__va((unsigned long)apm_info.bios.cseg << 4));
- set_desc_base(&gdt[APM_CS_16 >> 3],
- (unsigned long)__va((unsigned long)apm_info.bios.cseg_16 << 4));
- set_desc_base(&gdt[APM_DS >> 3],
- (unsigned long)__va((unsigned long)apm_info.bios.dseg << 4));
-
- proc_create("apm", 0, NULL, &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;
- }
- pm_flags &= ~PM_APM;
-}
-
-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);
@@ -365,9 +365,6 @@ void default_idle(void)
trace_power_end(smp_processor_id());
trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id());
}
-#ifdef CONFIG_APM_MODULE
-EXPORT_SYMBOL(default_idle);
-#endif
void stop_this_cpu(void *dummy)
{
@@ -428,9 +428,6 @@ void machine_real_restart(const unsigned char *code, int length)
:
: "i" ((void *)(0x1000 - sizeof (real_mode_switch) - 100)));
}
-#ifdef CONFIG_APM_MODULE
-EXPORT_SYMBOL(machine_real_restart);
-#endif
#endif /* CONFIG_X86_32 */
@@ -193,9 +193,6 @@ unsigned int machine_id;
unsigned int machine_submodel_id;
unsigned int BIOS_revision;
-struct apm_info apm_info;
-EXPORT_SYMBOL(apm_info);
-
#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
struct ist_info ist_info;
@@ -742,7 +739,6 @@ void __init setup_arch(char **cmdline_p)
screen_info = boot_params.screen_info;
edid_info = boot_params.edid_info;
#ifdef CONFIG_X86_32
- apm_info.bios = boot_params.apm_bios_info;
ist_info = boot_params.ist_info;
if (boot_params.sys_desc_table.length != 0) {
set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);