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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-12-08 07:46:48 +0100 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-12-08 09:30:43 +0100 |
commit | 26ff9fd62ff694e17b3748c6c7a7fa04ea9b9157 (patch) | |
tree | c9d9509ee3c9efc4eab72c6529bb3d97e494aabb /c/src/lib/libcpu/arm/mc9328mxl/timer/timer.c | |
parent | bsps/arm: Remove obsolete s3c2400 (diff) | |
download | rtems-26ff9fd62ff694e17b3748c6c7a7fa04ea9b9157.tar.bz2 |
bsp/csb336: Move libcpu files to BSP
Update #3254.
Diffstat (limited to 'c/src/lib/libcpu/arm/mc9328mxl/timer/timer.c')
-rw-r--r-- | c/src/lib/libcpu/arm/mc9328mxl/timer/timer.c | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/c/src/lib/libcpu/arm/mc9328mxl/timer/timer.c b/c/src/lib/libcpu/arm/mc9328mxl/timer/timer.c deleted file mode 100644 index 66ff4a0bf4..0000000000 --- a/c/src/lib/libcpu/arm/mc9328mxl/timer/timer.c +++ /dev/null @@ -1,93 +0,0 @@ -/** - * @file - * @brief Cogent CSB336 Timer driver - * - * This uses timer 2 for timing measurments. - */ - -/* - * Copyright (c) 2004 Cogent Computer Systems - * Written by Jay Monkman <jtm@lopingdog.com> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <rtems.h> -#include <bsp.h> -#include <rtems/btimer.h> -#include <mc9328mxl.h> - -uint32_t g_start; -uint32_t g_freq; - -bool benchmark_timer_find_average_overhead; - - -/* - * Set up Timer 1 - */ -void benchmark_timer_initialize( void ) -{ - MC9328MXL_TMR2_TCTL = (MC9328MXL_TMR_TCTL_CLKSRC_PCLK1 | - MC9328MXL_TMR_TCTL_FRR | - MC9328MXL_TMR_TCTL_TEN); - /* set prescaler to 1 (register value + 1) */ \ - MC9328MXL_TMR2_TPRER = 0; - - /* get freq of counter in KHz */ - g_freq = get_perclk1_freq() / 1000; - - g_start = MC9328MXL_TMR2_TCN; -} - -/* - * The following controls the behavior of benchmark_timer_read(). - * - * AVG_OVEREHAD is the overhead for starting and stopping the timer. It - * is usually deducted from the number returned. - * - * LEAST_VALID is the lowest number this routine should trust. Numbers - * below this are "noise" and zero is returned. - */ - -#define AVG_OVERHEAD 0 /* It typically takes X.X microseconds */ - /* (Y countdowns) to start/stop the timer. */ - /* This value is in microseconds. */ -#define LEAST_VALID 1 /* Don't trust a clicks value lower than this */ - -benchmark_timer_t benchmark_timer_read( void ) -{ - uint32_t t; - unsigned long long total; - - t = MC9328MXL_TMR2_TCN; - /* - * Total is calculated by taking into account the number of timer overflow - * interrupts since the timer was initialized and clicks since the last - * interrupts. - */ - - total = (t - g_start); - - /* convert to nanoseconds */ - total = (total * 1000)/ g_freq; - - if ( benchmark_timer_find_average_overhead == 1 ) { - return (int) total; - } else if ( total < LEAST_VALID ) { - return 0; - } - /* - * Somehow convert total into microseconds - */ - - return (total - AVG_OVERHEAD); -} - -void benchmark_timer_disable_subtracting_average_overhead(bool find_flag) -{ - benchmark_timer_find_average_overhead = find_flag; -} - |