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/* |
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Copyright (C) 2005-2007 by Pieter Palmers |
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This file is part of FFADO |
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FFADO = Free Firewire (pro-)audio drivers for linux |
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FFADO is based upon FreeBoB. |
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Based upon JackTime.c from the jackdmp package. |
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Original Copyright: |
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Copyright (C) 2001-2003 Paul Davis |
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Copyright (C) 2004-2006 Grame |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#include "Time.h" |
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#ifdef GETCYCLE_TIME |
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#include <stdio.h> |
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freebob_microsecs_t GetMhz(void) |
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{ |
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FILE *f = fopen("/proc/cpuinfo", "r"); |
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if (f == 0) |
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{ |
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perror("can't open /proc/cpuinfo\n"); |
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exit(1); |
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} |
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for ( ; ; ) |
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{ |
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freebob_microsecs_t mhz; |
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int ret; |
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char buf[1000]; |
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if (fgets(buf, sizeof(buf), f) == NULL) { |
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fprintf (stderr,"FATAL: cannot locate cpu MHz in " |
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"/proc/cpuinfo\n"); |
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exit(1); |
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} |
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#if defined(__powerpc__) |
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ret = sscanf(buf, "clock\t: %" SCNu64 "MHz", &mhz); |
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#elif defined( __i386__ ) || defined (__hppa__) || defined (__ia64__) || \ |
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defined(__x86_64__) |
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ret = sscanf(buf, "cpu MHz : %" SCNu64, &mhz); |
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#elif defined( __sparc__ ) |
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ret = sscanf(buf, "Cpu0Bogo : %" SCNu64, &mhz); |
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#elif defined( __mc68000__ ) |
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ret = sscanf(buf, "Clocking: %" SCNu64, &mhz); |
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#elif defined( __s390__ ) |
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ret = sscanf(buf, "bogomips per cpu: %" SCNu64, &mhz); |
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#else /* MIPS, ARM, alpha */ |
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ret = sscanf(buf, "BogoMIPS : %" SCNu64, &mhz); |
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#endif |
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if (ret == 1) |
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{ |
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fclose(f); |
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return (freebob_microsecs_t)mhz; |
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} |
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} |
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} |
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freebob_microsecs_t __freebob_cpu_mhz; |
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void InitTime() |
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{ |
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__freebob_cpu_mhz = GetMhz(); |
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} |
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#else |
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void InitTime() |
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{} |
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#endif |
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