forked from xuos/xiuos
154 lines
3.5 KiB
C
154 lines
3.5 KiB
C
/*
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* Portable interface to the CPU cycle counter
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#else
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#include <stdio.h>
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#define mbedtls_printf printf
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#endif
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#if defined(MBEDTLS_TIMING_C)
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#include "timing_alt.h"
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#if RT_VER_NUM >= 0x40004
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#include <sys/errno.h>
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#include <sys/signal.h>
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#else
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#include <signal.h>
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#include <time.h>
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#endif
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#ifdef _WIN32
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#define SIGALRM 14
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#endif
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struct _hr_time
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{
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struct timeval start;
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};
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static int hardclock_init = 0;
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static struct timeval tv_init;
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unsigned long mbedtls_timing_hardclock( void )
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{
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struct timeval tv_cur;
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if( hardclock_init == 0 )
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{
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gettimeofday( &tv_init, NULL );
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hardclock_init = 1;
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}
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gettimeofday( &tv_cur, NULL );
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return( ( tv_cur.tv_sec - tv_init.tv_sec ) * 1000000
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+ ( tv_cur.tv_usec - tv_init.tv_usec ) );
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}
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volatile int mbedtls_timing_alarmed = 0;
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unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset )
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{
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unsigned long delta;
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struct timeval offset;
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struct _hr_time *t = (struct _hr_time *) val;
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gettimeofday( &offset, NULL );
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if( reset )
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{
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t->start.tv_sec = offset.tv_sec;
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t->start.tv_usec = offset.tv_usec;
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return( 0 );
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}
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delta = ( offset.tv_sec - t->start.tv_sec ) * 1000
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+ ( offset.tv_usec - t->start.tv_usec ) / 1000;
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return( delta );
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}
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static void sighandler( int signum )
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{
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mbedtls_timing_alarmed = 1;
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signal( signum, sighandler );
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}
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unsigned int alarm(unsigned int seconds)
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{
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return 0;
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}
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void mbedtls_set_alarm( int seconds )
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{
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mbedtls_timing_alarmed = 0;
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signal( SIGALRM, sighandler );
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alarm( seconds );
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}
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/*
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* Set delays to watch
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*/
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void mbedtls_timing_set_delay( void *data, uint32_t int_ms, uint32_t fin_ms )
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{
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mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
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ctx->int_ms = int_ms;
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ctx->fin_ms = fin_ms;
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if( fin_ms != 0 )
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(void) mbedtls_timing_get_timer( &ctx->timer, 1 );
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}
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/*
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* Get number of delays expired
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*/
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int mbedtls_timing_get_delay( void *data )
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{
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mbedtls_timing_delay_context *ctx = (mbedtls_timing_delay_context *) data;
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unsigned long elapsed_ms;
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if( ctx->fin_ms == 0 )
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return( -1 );
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elapsed_ms = mbedtls_timing_get_timer( &ctx->timer, 0 );
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if( elapsed_ms >= ctx->fin_ms )
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return( 2 );
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if( elapsed_ms >= ctx->int_ms )
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return( 1 );
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return( 0 );
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}
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#endif /* MBEDTLS_TIMING_C */
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