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