mirror of
https://github.com/cuberite/polarssl.git
synced 2025-11-03 20:22:59 -05:00
468 lines
10 KiB
C
468 lines
10 KiB
C
/*
|
|
* Portable interface to the CPU cycle counter
|
|
*
|
|
* Copyright (C) 2006-2014, Brainspark B.V.
|
|
*
|
|
* This file is part of PolarSSL (http://www.polarssl.org)
|
|
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* 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_SELF_TEST) && defined(POLARSSL_PLATFORM_C)
|
|
#include "polarssl/platform.h"
|
|
#else
|
|
#include <stdio.h>
|
|
#define polarssl_printf printf
|
|
#endif
|
|
|
|
#if defined(POLARSSL_TIMING_C) && !defined(POLARSSL_TIMING_ALT)
|
|
|
|
#include "polarssl/timing.h"
|
|
|
|
#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
|
|
|
|
#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 volatile( "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 volatile( "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 volatile( "mftbu %0" : "=r" (tbu0) );
|
|
asm volatile( "mftb %0" : "=r" (tbl ) );
|
|
asm volatile( "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 volatile( "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 volatile( ".byte 0x83, 0x41, 0x00, 0x00" );
|
|
asm volatile( "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 volatile( "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 volatile( "mov %0 = ar.itc" : "=r" (itc) );
|
|
return( itc );
|
|
}
|
|
#endif
|
|
|
|
#if !defined(POLARSSL_HAVE_HARDCLOCK) && defined(_MSC_VER) && \
|
|
!defined(EFIX64) && !defined(EFI32)
|
|
|
|
#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) && !defined(EFIX64) && !defined(EFI32)
|
|
|
|
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 /* _WIN32 && !EFIX64 && !EFI32 */
|
|
|
|
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 );
|
|
}
|
|
|
|
#if defined(INTEGRITY)
|
|
void m_sleep( int milliseconds )
|
|
{
|
|
usleep( milliseconds * 1000 );
|
|
}
|
|
|
|
#else /* INTEGRITY */
|
|
|
|
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 ) * 1000;
|
|
|
|
select( 0, NULL, NULL, NULL, &tv );
|
|
}
|
|
#endif /* INTEGRITY */
|
|
|
|
#endif /* _WIN32 && !EFIX64 && !EFI32 */
|
|
|
|
#if defined(POLARSSL_SELF_TEST)
|
|
|
|
/* To test net_usleep against our functions */
|
|
#if defined(POLARSSL_NET_C)
|
|
#include "polarssl/net.h"
|
|
#endif
|
|
|
|
/*
|
|
* Checkup routine
|
|
*
|
|
* Warning: this is work in progress, some tests may not be reliable enough
|
|
* yet! False positives may happen.
|
|
*/
|
|
int timing_self_test( int verbose )
|
|
{
|
|
unsigned long cycles, ratio;
|
|
unsigned long millisecs, secs;
|
|
int hardfail;
|
|
struct hr_time hires;
|
|
|
|
if( verbose != 0)
|
|
polarssl_printf( " TIMING tests warning: will take some time!\n" );
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( " TIMING test #1 (m_sleep / get_timer): " );
|
|
|
|
for( secs = 1; secs <= 3; secs++ )
|
|
{
|
|
(void) get_timer( &hires, 1 );
|
|
|
|
m_sleep( 500 * secs );
|
|
|
|
millisecs = get_timer( &hires, 0 );
|
|
|
|
if( millisecs < 450 * secs || millisecs > 550 * secs )
|
|
{
|
|
if( verbose != 0 )
|
|
polarssl_printf( "failed\n" );
|
|
|
|
return( 1 );
|
|
}
|
|
}
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( "passed\n" );
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( " TIMING test #2 (set_alarm / get_timer): " );
|
|
|
|
for( secs = 1; secs <= 3; secs++ )
|
|
{
|
|
(void) get_timer( &hires, 1 );
|
|
|
|
set_alarm( secs );
|
|
while( !alarmed )
|
|
;
|
|
|
|
millisecs = get_timer( &hires, 0 );
|
|
|
|
if( millisecs < 900 * secs || millisecs > 1100 * secs )
|
|
{
|
|
if( verbose != 0 )
|
|
polarssl_printf( "failed\n" );
|
|
|
|
return( 1 );
|
|
}
|
|
}
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( "passed\n" );
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( " TIMING test #3 (hardclock / m_sleep ): " );
|
|
|
|
/*
|
|
* Allow one failure for possible counter wrapping.
|
|
* On a 4Ghz 32-bit machine the cycle counter wraps about once per second;
|
|
* since the whole test is about 10ms, it shouldn't happen twice in a row.
|
|
*/
|
|
hardfail = 0;
|
|
|
|
hard_test:
|
|
if( hardfail > 1 )
|
|
{
|
|
if( verbose != 0 )
|
|
polarssl_printf( "failed\n" );
|
|
|
|
return( 1 );
|
|
}
|
|
|
|
/* Get a reference ratio cycles/ms */
|
|
cycles = hardclock();
|
|
m_sleep( 1 );
|
|
cycles = hardclock() - cycles;
|
|
ratio = cycles / 1;
|
|
|
|
for( millisecs = 2; millisecs <= 4; millisecs++ )
|
|
{
|
|
cycles = hardclock();
|
|
m_sleep( millisecs );
|
|
cycles = hardclock() - cycles;
|
|
|
|
/* Allow variation up to 20% */
|
|
if( cycles / millisecs < ratio - ratio / 5 ||
|
|
cycles / millisecs > ratio + ratio / 5 )
|
|
{
|
|
hardfail++;
|
|
goto hard_test;
|
|
}
|
|
}
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( "passed\n" );
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( "\n" );
|
|
|
|
#if defined(POLARSSL_NET_C)
|
|
if( verbose != 0 )
|
|
polarssl_printf( " TIMING test #4 (net_usleep/ get_timer): " );
|
|
|
|
for( secs = 1; secs <= 3; secs++ )
|
|
{
|
|
(void) get_timer( &hires, 1 );
|
|
|
|
net_usleep( 500000 * secs );
|
|
|
|
millisecs = get_timer( &hires, 0 );
|
|
|
|
if( millisecs < 450 * secs || millisecs > 550 * secs )
|
|
{
|
|
if( verbose != 0 )
|
|
polarssl_printf( "failed\n" );
|
|
|
|
return( 1 );
|
|
}
|
|
}
|
|
|
|
if( verbose != 0 )
|
|
polarssl_printf( "passed\n" );
|
|
#endif
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
#endif /* POLARSSL_SELF_TEST */
|
|
|
|
#endif /* POLARSSL_TIMING_C && !POLARSSL_TIMING_ALT */
|