207 lines
7.5 KiB
C
207 lines
7.5 KiB
C
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/****************************************************************************
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* activity_governor.h
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*
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* Copyright (C) 2011-2012, 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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* Author: Matias Nitsche <mnitsche@dc.uba.ar>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __DRIVERS_POWER_ACTIVITY_GOVERNER_H
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#define __DRIVERS_POWER_ACTIVITY_GOVERNER_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/power/pm.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* CONFIG_PM_GOVERNOR_SLICEMS. The activity based governor collects activity
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* counts in time slices. At the end of the time slice, the count accumulated
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* during that interval is applied to an averaging algorithm to determine
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* the activity level.
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*
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* CONFIG_PM_GOVERNOR_SLICEMS provides the duration of that time slice in
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* milliseconds. Default: 100 Milliseconds
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*/
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#ifndef CONFIG_PM_GOVERNOR_SLICEMS
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# define CONFIG_PM_GOVERNOR_SLICEMS 100 /* Default is 100 msec */
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#endif
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#if CONFIG_PM_GOVERNOR_SLICEMS < 1
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# error CONFIG_PM_GOVERNOR_SLICEMS invalid
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#endif
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/* The averaging algorithm is simply: Y = (An*X + SUM(Ai*Yi))/SUM(Aj), where
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* i = 1..n-1 and j= 1..n, n is the length of the "memory", Ai is the
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* weight applied to each value, and X is the current activity. These weights
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* may be negative and a limited to the range of int16_t.
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*
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* CONFIG_PM_GOVERNOR_MEMORY:
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* provides the memory for the algorithm. Default: 2
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* CONFIG_PM_GOVERNOR_COEFn:
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* provides weight for each sample. Default: 1
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*
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* Setting CONFIG_PM_GOVERNOR_MEMORY=1 disables all smoothing.
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*/
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#ifndef CONFIG_PM_GOVERNOR_MEMORY
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# define CONFIG_PM_GOVERNOR_MEMORY 2
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#endif
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#if CONFIG_PM_GOVERNOR_MEMORY < 1
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# error "CONFIG_PM_GOVERNOR_MEMORY must be >= 1"
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#endif
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#ifndef CONFIG_PM_GOVERNOR_COEFN
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# define CONFIG_PM_GOVERNOR_COEFN 1
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#endif
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#if CONFIG_PM_GOVERNOR_MEMORY > 1 && !defined(CONFIG_PM_GOVERNOR_COEF1)
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# define CONFIG_PM_GOVERNOR_COEF1 1
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#endif
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#if CONFIG_PM_GOVERNOR_MEMORY > 2 && !defined(CONFIG_PM_GOVERNOR_COEF2)
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# define CONFIG_PM_GOVERNOR_COEF2 1
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#endif
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#if CONFIG_PM_GOVERNOR_MEMORY > 3 && !defined(CONFIG_PM_GOVERNOR_COEF3)
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# define CONFIG_PM_GOVERNOR_COEF3 1
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#endif
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#if CONFIG_PM_GOVERNOR_MEMORY > 4 && !defined(CONFIG_PM_GOVERNOR_COEF4)
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# define CONFIG_PM_GOVERNOR_COEF4 1
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#endif
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#if CONFIG_PM_GOVERNOR_MEMORY > 5 && !defined(CONFIG_PM_GOVERNOR_COEF5)
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# define CONFIG_PM_GOVERNOR_COEF5 1
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#endif
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#if CONFIG_PM_GOVERNOR_MEMORY > 6
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# warning "This logic needs to be extended"
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#endif
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/* State changes then occur when the weight activity account crosses
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* threshold values for certain periods of time (time slice count).
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*
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* CONFIG_PM_GOVERNOR_xxxENTER_THRESH is the threshold value for entering
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* state xxx.
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* CONFIG_PM_GOVERNOR_xxxENTER_COUNT is the count for entering state xxx.
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*
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* Resuming to normal state, on the other hand, is usually immediate and
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* controlled by wakeup conditions established by the platform. The PM
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* module only recommends reduced power states.
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*/
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#ifndef CONFIG_PM_GOVERNOR_IDLEENTER_THRESH
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# define CONFIG_PM_GOVERNOR_IDLEENTER_THRESH 1 /* <=1: Essentially no activity */
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#endif
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#ifndef CONFIG_PM_GOVERNOR_IDLEEXIT_THRESH
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# define CONFIG_PM_GOVERNOR_IDLEEXIT_THRESH 2 /* >=2: Active */
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#endif
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#if CONFIG_PM_GOVERNOR_IDLEENTER_THRESH >= CONFIG_PM_GOVERNOR_IDLEEXIT_THRESH
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# error "Must have CONFIG_PM_GOVERNOR_IDLEENTER_THRESH < CONFIG_PM_GOVERNOR_IDLEEXIT_THRESH"
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#endif
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#ifndef CONFIG_PM_GOVERNOR_IDLEENTER_COUNT
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# define CONFIG_PM_GOVERNOR_IDLEENTER_COUNT 30 /* Thirty IDLE slices to enter
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* IDLE mode from normal
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*/
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#endif
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#ifndef CONFIG_PM_GOVERNOR_STANDBYENTER_THRESH
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# define CONFIG_PM_GOVERNOR_STANDBYENTER_THRESH 1 /* <=1: Essentially no activity */
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#endif
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#ifndef CONFIG_PM_GOVERNOR_STANDBYEXIT_THRESH
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# define CONFIG_PM_GOVERNOR_STANDBYEXIT_THRESH 2 /* >=2: Active */
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#endif
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#if CONFIG_PM_GOVERNOR_STANDBYENTER_THRESH >= CONFIG_PM_GOVERNOR_STANDBYEXIT_THRESH
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# error "Must have CONFIG_PM_GOVERNOR_STANDBYENTER_THRESH < CONFIG_PM_GOVERNOR_STANDBYEXIT_THRESH"
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#endif
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#ifndef CONFIG_PM_GOVERNOR_STANDBYENTER_COUNT
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# define CONFIG_PM_GOVERNOR_STANDBYENTER_COUNT 50 /* Fifty IDLE slices to enter
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* STANDBY mode from IDLE
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*/
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#endif
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#ifndef CONFIG_PM_GOVERNOR_SLEEPENTER_THRESH
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# define CONFIG_PM_GOVERNOR_SLEEPENTER_THRESH 1 /* <=1: Essentially no activity */
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#endif
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#ifndef CONFIG_PM_GOVERNOR_SLEEPEXIT_THRESH
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# define CONFIG_PM_GOVERNOR_SLEEPEXIT_THRESH 2 /* >=2: Active */
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#endif
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#if CONFIG_PM_GOVERNOR_SLEEPENTER_THRESH >= CONFIG_PM_GOVERNOR_SLEEPEXIT_THRESH
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# error "Must have CONFIG_PM_GOVERNOR_SLEEPENTER_THRESH < CONFIG_PM_GOVERNOR_SLEEPEXIT_THRESH"
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#endif
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#ifndef CONFIG_PM_GOVERNOR_SLEEPENTER_COUNT
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# define CONFIG_PM_GOVERNOR_SLEEPENTER_COUNT 70 /* 70 IDLE slices to enter SLEEP
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* mode from STANDBY
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*/
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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FAR struct pm_governor_s *pm_activity_governor_initialize(void);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif // __DRIVERS_POWER_ACTIVITY_GOVERNER_H
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