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/*
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 * Copyright (c) 2005, Kohsuke Ohtani
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 * All rights reserved.
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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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 * 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 the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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/*
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 * cpumon.c - CPU voltage monitoring program
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 */
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#include <sys/prex.h>
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#include <sys/ioctl.h>
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#include <stdio.h>
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static struct cpufreqinfo cf_info;
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int
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main(int argc, char *argv[])
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{
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        device_t dev;
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        int last_mhz = 0;
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        int i, j;
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        static char bar[21];
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        /* Boost current prioriy */
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        thread_setpri(thread_self(), 50);
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        if (device_open("cpufreq", 0, &dev))
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                panic("open error: cpufreq");
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        /* Clear screen */
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        printf("\33[2J");
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        printf("CPU voltage monitor\n");
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        device_ioctl(dev, CFIOC_GET_INFO, &cf_info);
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        if (cf_info.freq == 0 || cf_info.volts == 0)
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                panic("Invalid cpu power/speed");
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        /*
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         * Setup periodic timer for 10msec period
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         */
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        timer_periodic(thread_self(), 100, 10);
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        for (;;) {
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                /*
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                 * Wait next period
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                 */
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                timer_waitperiod();
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                device_ioctl(dev, CFIOC_GET_INFO, &cf_info);
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                if (cf_info.freq != last_mhz) {
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                        printf("\33[s"); /* save cursor */
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                        /*
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                         * Display speed
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                         */
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                        printf("\nSpeed: %4dMHz  0|", cf_info.freq);
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                        j = cf_info.freq * 100 / cf_info.maxfreq;
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                        for (i = 0; i < 20; i++)
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                                bar[i] = (i <= j / 5) ? '*' : '-';
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                        bar[i] = '\0';
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                        printf("%s|100", bar);
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                        /*
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                         * Display power
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                         */
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                        printf("\nPower: %4dmV   0|", cf_info.volts);
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                        j = cf_info.volts * 100 / cf_info.maxvolts;
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                        for (i = 0; i < 20; i++)
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                                bar[i] = (i <= j / 5) ? '*' : '-';
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                        bar[i] = '\0';
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                        printf("%s|100", bar);
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                        printf("\33[u"); /* restore cursor */
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                        last_mhz = cf_info.freq;
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                }
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        }
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        return 0;
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}