diff options
Diffstat (limited to 'c/src/lib/libbsp/sparc/erc32/timer/timer.c')
-rw-r--r-- | c/src/lib/libbsp/sparc/erc32/timer/timer.c | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/c/src/lib/libbsp/sparc/erc32/timer/timer.c b/c/src/lib/libbsp/sparc/erc32/timer/timer.c deleted file mode 100644 index 05728f8acc..0000000000 --- a/c/src/lib/libbsp/sparc/erc32/timer/timer.c +++ /dev/null @@ -1,81 +0,0 @@ -/* timer.c - * - * This file implements a benchmark timer using the General Purpose Timer on - * the MEC. - * - * 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.org/license/LICENSE. - * - * Ported to ERC32 implementation of the SPARC by On-Line Applications - * Research Corporation (OAR) under contract to the European Space - * Agency (ESA). - * - * ERC32 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 */ - ERC32_MEC.General_Purpose_Timer_Scalar = CLOCK_SPEED - 1; - ERC32_MEC.General_Purpose_Timer_Counter = 0xffffffff; - - } else { - benchmark_timer_is_initialized = true; - } - - ERC32_MEC_Set_General_Purpose_Timer_Control( - ERC32_MEC_TIMER_COUNTER_ENABLE_COUNTING | - ERC32_MEC_TIMER_COUNTER_LOAD_COUNTER - ); - - ERC32_MEC_Set_General_Purpose_Timer_Control( - ERC32_MEC_TIMER_COUNTER_ENABLE_COUNTING - ); - -} - -#define AVG_OVERHEAD 12 /* It typically takes 3.0 microseconds */ - /* to start/stop the timer. */ -#define LEAST_VALID 13 /* Don't trust a value lower than this */ - -benchmark_timer_t benchmark_timer_read(void) -{ - uint32_t total; - - total = ERC32_MEC.General_Purpose_Timer_Counter; - - total = 0xffffffff - 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; -} |