diff options
Diffstat (limited to 'c/src/lib/libbsp/or1k/generic_or1k/timer/timer.c')
-rw-r--r-- | c/src/lib/libbsp/or1k/generic_or1k/timer/timer.c | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/c/src/lib/libbsp/or1k/generic_or1k/timer/timer.c b/c/src/lib/libbsp/or1k/generic_or1k/timer/timer.c deleted file mode 100644 index 872f1af7be..0000000000 --- a/c/src/lib/libbsp/or1k/generic_or1k/timer/timer.c +++ /dev/null @@ -1,64 +0,0 @@ -/** - * @file - * - * @ingroup generic_or1k - * - * @brief Benchmark timer support. - */ - -/* - * Copyright (c) 2014-2015 by Hesham ALMatary - * - * 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 <rtems/btimer.h> -#include <bsp/generic_or1k.h> -#include <rtems/score/or1k-utility.h> - -#define OR1K_NANOSECONDS_PER_CLK_CYCLE 10 - -static bool benchmark_timer_find_average_overhead = false; -static uint64_t benchmark_timer_base; - -void benchmark_timer_initialize(void) -{ - benchmark_timer_base = _OR1K_mfspr(CPU_OR1K_SPR_TTCR); -} - -#define AVG_OVERHEAD 0 -#define LEAST_VALID 1 - -benchmark_timer_t benchmark_timer_read( void ) -{ - uint64_t clicks; - uint64_t total; - uint64_t delta; - /* - * Read the timer and see how many clicks (clock cycles) - * has passed since timer initialization. - */ - clicks = _OR1K_mfspr(CPU_OR1K_SPR_TTCR); - - delta = clicks - benchmark_timer_base; - - /* total in nanoseconds */ - total = OR1K_NANOSECONDS_PER_CLK_CYCLE * (delta); - - if ( benchmark_timer_find_average_overhead == true ) - return total; /* in nanoseconds microsecond units */ - else { - 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; -} |