diff options
Diffstat (limited to 'c/src/lib/libbsp/sparc/leon2/timer/timer.c')
-rw-r--r-- | c/src/lib/libbsp/sparc/leon2/timer/timer.c | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/c/src/lib/libbsp/sparc/leon2/timer/timer.c b/c/src/lib/libbsp/sparc/leon2/timer/timer.c deleted file mode 100644 index de115c965a..0000000000 --- a/c/src/lib/libbsp/sparc/leon2/timer/timer.c +++ /dev/null @@ -1,83 +0,0 @@ -/** - * @file - * @ingroup sparc_leon2 - * @brief Implement a benchmark timer using timer 2 - */ - -/* timer.c - * - * This file implements a benchmark timer using timer 2. - * - * COPYRIGHT (c) 1989-1998. - * 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.org/license/LICENSE. - * - * Ported to LEON implementation of the SPARC by On-Line Applications - * Research Corporation (OAR) under contract to the European Space - * Agency (ESA). - * - * LEON modifications of respective RTEMS file: COPYRIGHT (c) 1995. - * European Space Agency. - */ - - -#include <bsp.h> -#include <rtems/btimer.h> - -bool benchmark_timer_find_average_overhead; - -bool benchmark_timer_is_initialized = false; - -void benchmark_timer_initialize(void) -{ - /* - * Timer runs long and accurate enough not to require an interrupt. - */ - - if ( benchmark_timer_is_initialized == false ) { - - /* approximately 1 us per countdown */ - LEON_REG.Timer_Counter_2 = 0xffffff; - LEON_REG.Timer_Reload_2 = 0xffffff; - - } else { - benchmark_timer_is_initialized = true; - } - - LEON_REG.Timer_Control_2 = ( - LEON_REG_TIMER_COUNTER_ENABLE_COUNTING | - LEON_REG_TIMER_COUNTER_LOAD_COUNTER - ); - -} - -#define AVG_OVERHEAD 3 /* It typically takes 3.0 microseconds */ - /* to start/stop the timer. */ -#define LEAST_VALID 2 /* Don't trust a value lower than this */ - -benchmark_timer_t benchmark_timer_read(void) -{ - uint32_t total; - - total = LEON_REG.Timer_Counter_2; - - total = 0xffffff - total; - - if ( benchmark_timer_find_average_overhead == true ) - return total; /* in one microsecond units */ - - if ( total < LEAST_VALID ) - return 0; /* below timer resolution */ - - return total - AVG_OVERHEAD; -} - -void benchmark_timer_disable_subtracting_average_overhead( - bool find_flag -) -{ - benchmark_timer_find_average_overhead = find_flag; -} |