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authorRalf Corsepius <ralf.corsepius@rtems.org>2010-06-11 12:28:40 +0000
committerRalf Corsepius <ralf.corsepius@rtems.org>2010-06-11 12:28:40 +0000
commit3490d70a08dbecee70fab0ebdd263b53311b44df (patch)
treec0f20636620a9b7a2789cbdbc1b080accd22d9a4 /c/src/lib/libbsp/c4x/c4xsim/timer/timer.c
parent2010-06-11 Ralf Corsépius <ralf.corsepius@rtems.org> (diff)
downloadrtems-3490d70a08dbecee70fab0ebdd263b53311b44df.tar.bz2
Remove (Abandoned).
Diffstat (limited to 'c/src/lib/libbsp/c4x/c4xsim/timer/timer.c')
-rw-r--r--c/src/lib/libbsp/c4x/c4xsim/timer/timer.c105
1 files changed, 0 insertions, 105 deletions
diff --git a/c/src/lib/libbsp/c4x/c4xsim/timer/timer.c b/c/src/lib/libbsp/c4x/c4xsim/timer/timer.c
deleted file mode 100644
index 8b61bfb6d3..0000000000
--- a/c/src/lib/libbsp/c4x/c4xsim/timer/timer.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/* timer.c
- *
- * This file manages the benchmark timer used by the RTEMS Timing Test
- * Suite. Each measured time period is demarcated by calls to
- * benchmark_timer_initialize() and benchmark_timer_read(). benchmark_timer_read() usually returns
- * the number of microseconds since benchmark_timer_initialize() exitted.
- *
- * NOTE: It is important that the timer start/stop overhead be
- * determined when porting or modifying this code.
- *
- * COPYRIGHT (c) 1989-1999.
- * On-Line Applications Research Corporation (OAR).
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.com/license/LICENSE.
- *
- * $Id$
- */
-
-#include <rtems.h>
-#include <bsp.h>
-#include <rtems/tic4x/c4xio.h>
-
-uint32_t Timer_interrupts;
-bool benchmark_timer_find_average_overhead;
-
-static uint32_t start;
-
-void benchmark_timer_initialize( void )
-{
-
- /*
- * Timer has never overflowed. This may not be necessary on some
- * implemenations of timer but ....
- */
-
- c4x_timer_stop(C4X_TIMER_0);
- c4x_timer_set_period(C4X_TIMER_0, 0xffffffff); /* so no interupts */
- c4x_timer_start(C4X_TIMER_0);
- start = c4x_timer_get_counter(C4X_TIMER_0);
-
- Timer_interrupts = 0;
-
- /*
- * Somehow start the timer
- */
-}
-
-/*
- * 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 */
-
-int benchmark_timer_read( void )
-{
- uint32_t clicks;
- uint32_t total;
- int tmp;
-
- /*
- * Read the timer and see how many clicks it has been since we started.
- */
-
- clicks = c4x_timer_get_counter(C4X_TIMER_0);
- clicks -= start;
-
- /*
- * 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 = clicks * 1;
-
- if ( benchmark_timer_find_average_overhead == true ) {
- return total; /* in count units where each count is */
- /* 1 / (clock frequency/2) */
- } else {
- if ( total < LEAST_VALID )
- return 0; /* below timer resolution */
- /*
- * Somehow convert total into microseconds
- */
- tmp = (int) ((float) total * ((1.0 / 25.0)));
- return (tmp - AVG_OVERHEAD);
- }
-}
-
-void benchmark_timer_disable_subtracting_average_overhead(
- bool find_flag
-)
-{
- benchmark_timer_find_average_overhead = find_flag;
-}