diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/mrm332/timer')
-rw-r--r-- | c/src/lib/libbsp/m68k/mrm332/timer/.cvsignore | 2 | ||||
-rw-r--r-- | c/src/lib/libbsp/m68k/mrm332/timer/Makefile.am | 32 | ||||
-rw-r--r-- | c/src/lib/libbsp/m68k/mrm332/timer/timer.c | 83 |
3 files changed, 117 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/mrm332/timer/.cvsignore b/c/src/lib/libbsp/m68k/mrm332/timer/.cvsignore new file mode 100644 index 0000000000..282522db03 --- /dev/null +++ b/c/src/lib/libbsp/m68k/mrm332/timer/.cvsignore @@ -0,0 +1,2 @@ +Makefile +Makefile.in diff --git a/c/src/lib/libbsp/m68k/mrm332/timer/Makefile.am b/c/src/lib/libbsp/m68k/mrm332/timer/Makefile.am new file mode 100644 index 0000000000..5c2b8edf56 --- /dev/null +++ b/c/src/lib/libbsp/m68k/mrm332/timer/Makefile.am @@ -0,0 +1,32 @@ +## +## $Id$ +## + +AUTOMAKE_OPTIONS = foreign 1.4 + +PGM = $(ARCH)/timer.rel + +C_FILES = timer.c +C_O_FILES = $(C_FILES:%.c=$(ARCH)/%.o) + +OBJS = $(C_O_FILES) + +include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg +include $(top_srcdir)/../../../../../../automake/lib.am + +# +# (OPTIONAL) Add local stuff here using += +# + +$(PGM): $(OBJS) + $(make-rel) + +# the .rel file built here will be put into libbsp.a by ../wrapup/Makefile + +all-local: $(ARCH) $(OBJS) $(PGM) + +.PRECIOUS: $(PGM) + +EXTRA_DIST = timer.c + +include $(top_srcdir)/../../../../../../automake/local.am diff --git a/c/src/lib/libbsp/m68k/mrm332/timer/timer.c b/c/src/lib/libbsp/m68k/mrm332/timer/timer.c new file mode 100644 index 0000000000..7fa8f3b718 --- /dev/null +++ b/c/src/lib/libbsp/m68k/mrm332/timer/timer.c @@ -0,0 +1,83 @@ +/* Timer_init() + * + * This routine initializes a timer in efi68k's DP8570A TCP + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * 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.OARcorp.com/rtems/license.html. + * + * $Id$ + */ + + +#include <bsp.h> + +rtems_boolean Timer_driver_Find_average_overhead; + +extern rtems_isr Clock_isr(); + +void Timer_initialize( void ) +{ +} + +/* + * The following controls the behavior of Read_timer(). + * + * FIND_AVG_OVERHEAD * instructs the routine to return the "raw" count. + * + * 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 */ + +/* + * Return timer value in 1/2-microsecond units + */ +int Read_timer( void ) +{ + rtems_unsigned32 total; + total = 0; + + if ( Timer_driver_Find_average_overhead == 1 ) + return total; /* in XXX microsecond units */ + + if ( total < LEAST_VALID ) + return 0; /* below timer resolution */ + + return (total - AVG_OVERHEAD); +} + + +/* + * Empty function call used in loops to measure basic cost of looping + * in Timing Test Suite. + */ + +rtems_status_code Empty_function(void) +{ + return RTEMS_SUCCESSFUL; +} + +void Set_find_average_overhead( + rtems_boolean find_flag +) +{ + Timer_driver_Find_average_overhead = find_flag; +} |