mbedtls/library/timing.c

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/*
* Portable interface to the CPU cycle counter
*
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* Copyright (C) 2006-2010, Brainspark B.V.
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*
* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
2010-07-18 20:36:00 +00:00
*
* All rights reserved.
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*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "polarssl/config.h"
#if defined(POLARSSL_TIMING_C)
#include "polarssl/timing.h"
#if defined(_WIN32)
#include <windows.h>
#include <winbase.h>
struct _hr_time
{
LARGE_INTEGER start;
};
#else
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <signal.h>
#include <time.h>
struct _hr_time
{
struct timeval start;
};
#endif
#if !defined(POLARSSL_HAVE_HARDCLOCK) && defined(POLARSSL_HAVE_ASM) && \
(defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
#define POLARSSL_HAVE_HARDCLOCK
unsigned long hardclock( void )
{
unsigned long tsc;
__asm rdtsc
__asm mov [tsc], eax
return( tsc );
}
#endif
#if !defined(POLARSSL_HAVE_HARDCLOCK) && defined(POLARSSL_HAVE_ASM) && \
defined(__GNUC__) && defined(__i386__)
#define POLARSSL_HAVE_HARDCLOCK
unsigned long hardclock( void )
{
unsigned long lo, hi;
asm( "rdtsc" : "=a" (lo), "=d" (hi) );
return( lo );
}
#endif
#if !defined(POLARSSL_HAVE_HARDCLOCK) && defined(POLARSSL_HAVE_ASM) && \
defined(__GNUC__) && (defined(__amd64__) || defined(__x86_64__))
#define POLARSSL_HAVE_HARDCLOCK
unsigned long hardclock( void )
{
unsigned long lo, hi;
asm( "rdtsc" : "=a" (lo), "=d" (hi) );
return( lo | (hi << 32) );
}
#endif
#if !defined(POLARSSL_HAVE_HARDCLOCK) && defined(POLARSSL_HAVE_ASM) && \
defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
#define POLARSSL_HAVE_HARDCLOCK
unsigned long hardclock( void )
{
unsigned long tbl, tbu0, tbu1;
do
{
asm( "mftbu %0" : "=r" (tbu0) );
asm( "mftb %0" : "=r" (tbl ) );
asm( "mftbu %0" : "=r" (tbu1) );
}
while( tbu0 != tbu1 );
return( tbl );
}
#endif
#if !defined(POLARSSL_HAVE_HARDCLOCK) && defined(POLARSSL_HAVE_ASM) && \
defined(__GNUC__) && defined(__sparc64__)
#if defined(__OpenBSD__)
#warning OpenBSD does not allow access to tick register using software version instead
#else
#define POLARSSL_HAVE_HARDCLOCK
unsigned long hardclock( void )
{
unsigned long tick;
asm( "rdpr %%tick, %0;" : "=&r" (tick) );
return( tick );
}
#endif
#endif
#if !defined(POLARSSL_HAVE_HARDCLOCK) && defined(POLARSSL_HAVE_ASM) && \
defined(__GNUC__) && defined(__sparc__) && !defined(__sparc64__)
#define POLARSSL_HAVE_HARDCLOCK
unsigned long hardclock( void )
{
unsigned long tick;
asm( ".byte 0x83, 0x41, 0x00, 0x00" );
asm( "mov %%g1, %0" : "=r" (tick) );
return( tick );
}
#endif
#if !defined(POLARSSL_HAVE_HARDCLOCK) && defined(POLARSSL_HAVE_ASM) && \
defined(__GNUC__) && defined(__alpha__)
#define POLARSSL_HAVE_HARDCLOCK
unsigned long hardclock( void )
{
unsigned long cc;
asm( "rpcc %0" : "=r" (cc) );
return( cc & 0xFFFFFFFF );
}
#endif
#if !defined(POLARSSL_HAVE_HARDCLOCK) && defined(POLARSSL_HAVE_ASM) && \
defined(__GNUC__) && defined(__ia64__)
#define POLARSSL_HAVE_HARDCLOCK
unsigned long hardclock( void )
{
unsigned long itc;
asm( "mov %0 = ar.itc" : "=r" (itc) );
return( itc );
}
#endif
#if !defined(POLARSSL_HAVE_HARDCLOCK) && defined(_MSC_VER)
#define POLARSSL_HAVE_HARDCLOCK
unsigned long hardclock( void )
{
LARGE_INTEGER offset;
QueryPerformanceCounter( &offset );
return (unsigned long)( offset.QuadPart );
}
#endif
#if !defined(POLARSSL_HAVE_HARDCLOCK)
#define POLARSSL_HAVE_HARDCLOCK
static int hardclock_init = 0;
static struct timeval tv_init;
unsigned long hardclock( void )
{
struct timeval tv_cur;
if( hardclock_init == 0 )
{
gettimeofday( &tv_init, NULL );
hardclock_init = 1;
}
gettimeofday( &tv_cur, NULL );
return( ( tv_cur.tv_sec - tv_init.tv_sec ) * 1000000
+ ( tv_cur.tv_usec - tv_init.tv_usec ) );
}
#endif
volatile int alarmed = 0;
#if defined(_WIN32)
unsigned long get_timer( struct hr_time *val, int reset )
{
unsigned long delta;
LARGE_INTEGER offset, hfreq;
struct _hr_time *t = (struct _hr_time *) val;
QueryPerformanceCounter( &offset );
QueryPerformanceFrequency( &hfreq );
delta = (unsigned long)( ( 1000 *
( offset.QuadPart - t->start.QuadPart ) ) /
hfreq.QuadPart );
if( reset )
QueryPerformanceCounter( &t->start );
return( delta );
}
DWORD WINAPI TimerProc( LPVOID uElapse )
{
Sleep( (DWORD) uElapse );
alarmed = 1;
return( TRUE );
}
void set_alarm( int seconds )
{
DWORD ThreadId;
alarmed = 0;
CloseHandle( CreateThread( NULL, 0, TimerProc,
(LPVOID) ( seconds * 1000 ), 0, &ThreadId ) );
}
void m_sleep( int milliseconds )
{
Sleep( milliseconds );
}
#else
unsigned long get_timer( struct hr_time *val, int reset )
{
unsigned long delta;
struct timeval offset;
struct _hr_time *t = (struct _hr_time *) val;
gettimeofday( &offset, NULL );
delta = ( offset.tv_sec - t->start.tv_sec ) * 1000
+ ( offset.tv_usec - t->start.tv_usec ) / 1000;
if( reset )
{
t->start.tv_sec = offset.tv_sec;
t->start.tv_usec = offset.tv_usec;
}
return( delta );
}
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#if defined(INTEGRITY)
void m_sleep( int milliseconds )
{
usleep( milliseconds * 1000 );
}
#else
static void sighandler( int signum )
{
alarmed = 1;
signal( signum, sighandler );
}
void set_alarm( int seconds )
{
alarmed = 0;
signal( SIGALRM, sighandler );
alarm( seconds );
}
void m_sleep( int milliseconds )
{
struct timeval tv;
tv.tv_sec = milliseconds / 1000;
tv.tv_usec = milliseconds * 1000;
select( 0, NULL, NULL, NULL, &tv );
}
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#endif /* INTEGRITY */
#endif
#endif