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Diffstat (limited to 'c/src/lib/libbsp/or32/orp/timer/timerisr.c')
-rw-r--r-- | c/src/lib/libbsp/or32/orp/timer/timerisr.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/or32/orp/timer/timerisr.c b/c/src/lib/libbsp/or32/orp/timer/timerisr.c new file mode 100644 index 0000000000..f492761a05 --- /dev/null +++ b/c/src/lib/libbsp/or32/orp/timer/timerisr.c @@ -0,0 +1,36 @@ +/* timerisr.s + * + * If required this ISR is used to bump a count of interval "overflow" + * interrupts which have occurred since the timer was started. The + * number of overflows is taken into account in the Read_timer() + * routine if necessary. + * + * To reduce overhead this is best to be the "rawest" hardware interupt + * handler you can write. This should be the only interrupt which can + * occur during the measured time period. + * + * NOTE: This file is USUALLY in assembly and is LEAN AND MEAN. + * Any code in this isr is pure overhead which can perturb + * the accuracy of the Timing Test Suite. + * + * 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.OARcorp.com/rtems/license.html. + * + * $Id$ + */ + +#include <rtems.h> + +extern rtems_unsigned32 _Timer_interrupts; + +void timerisr( void ) +{ + /* + * _Timer_interrupts += TIMER_BETWEEN_OVERFLOWS (usually in microseconds) + * return from interrupt + */ +} |