include/linux/apm_bios.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * Include file for the interface to an APM BIOS
0004  * Copyright 1994-2001 Stephen Rothwell (sfr@canb.auug.org.au)
0005  */
0006 #ifndef _LINUX_APM_H
0007 #define _LINUX_APM_H
0008
0009 #include <uapi/linux/apm_bios.h>
0010
0011
0012 #define APM_CS      (GDT_ENTRY_APMBIOS_BASE * 8)
0013 #define APM_CS_16   (APM_CS + 8)
0014 #define APM_DS      (APM_CS_16 + 8)
0015
0016 /* Results of APM Installation Check */
0017 #define APM_16_BIT_SUPPORT  0x0001
0018 #define APM_32_BIT_SUPPORT  0x0002
0019 #define APM_IDLE_SLOWS_CLOCK    0x0004
0020 #define APM_BIOS_DISABLED       0x0008
0021 #define APM_BIOS_DISENGAGED     0x0010
0022
0023 /*
0024  * Data for APM that is persistent across module unload/load
0025  */
0026 struct apm_info {
0027     struct apm_bios_info    bios;
0028     unsigned short      connection_version;
0029     int         get_power_status_broken;
0030     int         get_power_status_swabinminutes;
0031     int         allow_ints;
0032     int         forbid_idle;
0033     int         realmode_power_off;
0034     int         disabled;
0035 };
0036
0037 /*
0038  * The APM function codes
0039  */
0040 #define APM_FUNC_INST_CHECK 0x5300
0041 #define APM_FUNC_REAL_CONN  0x5301
0042 #define APM_FUNC_16BIT_CONN 0x5302
0043 #define APM_FUNC_32BIT_CONN 0x5303
0044 #define APM_FUNC_DISCONN    0x5304
0045 #define APM_FUNC_IDLE       0x5305
0046 #define APM_FUNC_BUSY       0x5306
0047 #define APM_FUNC_SET_STATE  0x5307
0048 #define APM_FUNC_ENABLE_PM  0x5308
0049 #define APM_FUNC_RESTORE_BIOS   0x5309
0050 #define APM_FUNC_GET_STATUS 0x530a
0051 #define APM_FUNC_GET_EVENT  0x530b
0052 #define APM_FUNC_GET_STATE  0x530c
0053 #define APM_FUNC_ENABLE_DEV_PM  0x530d
0054 #define APM_FUNC_VERSION    0x530e
0055 #define APM_FUNC_ENGAGE_PM  0x530f
0056 #define APM_FUNC_GET_CAP    0x5310
0057 #define APM_FUNC_RESUME_TIMER   0x5311
0058 #define APM_FUNC_RESUME_ON_RING 0x5312
0059 #define APM_FUNC_TIMER      0x5313
0060
0061 /*
0062  * Function code for APM_FUNC_RESUME_TIMER
0063  */
0064 #define APM_FUNC_DISABLE_TIMER  0
0065 #define APM_FUNC_GET_TIMER  1
0066 #define APM_FUNC_SET_TIMER  2
0067
0068 /*
0069  * Function code for APM_FUNC_RESUME_ON_RING
0070  */
0071 #define APM_FUNC_DISABLE_RING   0
0072 #define APM_FUNC_ENABLE_RING    1
0073 #define APM_FUNC_GET_RING   2
0074
0075 /*
0076  * Function code for APM_FUNC_TIMER_STATUS
0077  */
0078 #define APM_FUNC_TIMER_DISABLE  0
0079 #define APM_FUNC_TIMER_ENABLE   1
0080 #define APM_FUNC_TIMER_GET  2
0081
0082 /*
0083  * in arch/i386/kernel/setup.c
0084  */
0085 extern struct apm_info  apm_info;
0086
0087 /*
0088  * This is the "All Devices" ID communicated to the BIOS
0089  */
0090 #define APM_DEVICE_BALL     ((apm_info.connection_version > 0x0100) ? \
0091                  APM_DEVICE_ALL : APM_DEVICE_OLD_ALL)
0092 #endif  /* LINUX_APM_H */