66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
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/* -*- Mode: C; c-basic-offset: 3 -*-
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*
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* apm.c - Support for the legacy Advanced Power Management (APM) BIOS
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*
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* This file is part of Metalkit, a simple collection of modules for
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* writing software that runs on the bare metal. Get the latest code
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* at http://svn.navi.cx/misc/trunk/metalkit/
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*
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* Copyright (c) 2008-2009 Micah Dowty
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __APM_H__
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#define __APM_H__
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#include "types.h"
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#include "bios.h"
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#define SIGNATURE_APM 0x504d // "PM"
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#define APM_FLAG_16BIT (1 << 0)
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#define APM_FLAG_32BIT (1 << 1)
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#define APM_FLAG_SLOW_CPU_ON_IDLE (1 << 2)
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#define APM_FLAG_DISABLED (1 << 3)
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#define APM_FLAG_DISENGAGED (1 << 4)
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/* APM power states */
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#define POWER_ON 0
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#define POWER_STANDBY 1
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#define POWER_SUSPEND 2
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#define POWER_OFF 3
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typedef struct {
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Bool connected; // Are we successfully connected to APM?
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uint16 version; // Supported APM version in BCD, 0 if not supported
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uint16 flags;
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} APMState;
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extern APMState gAPM;
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fastcall void APM_Init();
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fastcall void APM_Idle();
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fastcall Bool APM_SetPowerState(uint16 state);
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#endif /* __APM_H_ */
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