1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Include file for the interface to an APM BIOS
4 * Copyright 1994-2001 Stephen Rothwell (sfr@canb.auug.org.au)
5 */
6#ifndef _LINUX_APM_H
7#define _LINUX_APM_H
8
9#include <uapi/linux/apm_bios.h>
10
11
12#define APM_CS (GDT_ENTRY_APMBIOS_BASE * 8)
13#define APM_CS_16 (APM_CS + 8)
14#define APM_DS (APM_CS_16 + 8)
15
16/* Results of APM Installation Check */
17#define APM_16_BIT_SUPPORT 0x0001
18#define APM_32_BIT_SUPPORT 0x0002
19#define APM_IDLE_SLOWS_CLOCK 0x0004
20#define APM_BIOS_DISABLED 0x0008
21#define APM_BIOS_DISENGAGED 0x0010
22
23/*
24 * Data for APM that is persistent across module unload/load
25 */
26struct apm_info {
27 struct apm_bios_info bios;
28 unsigned short connection_version;
29 int get_power_status_broken;
30 int get_power_status_swabinminutes;
31 int allow_ints;
32 int forbid_idle;
33 int realmode_power_off;
34 int disabled;
35};
36
37/*
38 * The APM function codes
39 */
40#define APM_FUNC_INST_CHECK 0x5300
41#define APM_FUNC_REAL_CONN 0x5301
42#define APM_FUNC_16BIT_CONN 0x5302
43#define APM_FUNC_32BIT_CONN 0x5303
44#define APM_FUNC_DISCONN 0x5304
45#define APM_FUNC_IDLE 0x5305
46#define APM_FUNC_BUSY 0x5306
47#define APM_FUNC_SET_STATE 0x5307
48#define APM_FUNC_ENABLE_PM 0x5308
49#define APM_FUNC_RESTORE_BIOS 0x5309
50#define APM_FUNC_GET_STATUS 0x530a
51#define APM_FUNC_GET_EVENT 0x530b
52#define APM_FUNC_GET_STATE 0x530c
53#define APM_FUNC_ENABLE_DEV_PM 0x530d
54#define APM_FUNC_VERSION 0x530e
55#define APM_FUNC_ENGAGE_PM 0x530f
56#define APM_FUNC_GET_CAP 0x5310
57#define APM_FUNC_RESUME_TIMER 0x5311
58#define APM_FUNC_RESUME_ON_RING 0x5312
59#define APM_FUNC_TIMER 0x5313
60
61/*
62 * Function code for APM_FUNC_RESUME_TIMER
63 */
64#define APM_FUNC_DISABLE_TIMER 0
65#define APM_FUNC_GET_TIMER 1
66#define APM_FUNC_SET_TIMER 2
67
68/*
69 * Function code for APM_FUNC_RESUME_ON_RING
70 */
71#define APM_FUNC_DISABLE_RING 0
72#define APM_FUNC_ENABLE_RING 1
73#define APM_FUNC_GET_RING 2
74
75/*
76 * Function code for APM_FUNC_TIMER_STATUS
77 */
78#define APM_FUNC_TIMER_DISABLE 0
79#define APM_FUNC_TIMER_ENABLE 1
80#define APM_FUNC_TIMER_GET 2
81
82/*
83 * in arch/i386/kernel/setup.c
84 */
85extern struct apm_info apm_info;
86
87/*
88 * This is the "All Devices" ID communicated to the BIOS
89 */
90#define APM_DEVICE_BALL ((apm_info.connection_version > 0x0100) ? \
91 APM_DEVICE_ALL : APM_DEVICE_OLD_ALL)
92#endif /* LINUX_APM_H */
93

source code of linux/include/linux/apm_bios.h