diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2001-10-11 21:04:35 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2001-10-11 21:04:35 +0000 |
commit | cd67dcaf009326c46d67951976f87a6559ed7928 (patch) | |
tree | 96f9988bfe3f4c56ea79b00f2146f8c09c6be5d0 /c/src/lib/libbsp/sh/simsh4/timer/timer.c | |
parent | 2001-10-11 Ralf Corsepius <corsepiu@faw.uni-ulm.de> (diff) | |
download | rtems-cd67dcaf009326c46d67951976f87a6559ed7928.tar.bz2 |
2001-10-11 Alexandra Kossovsky <sasha@oktet.ru>
* clock/Makefile.am, clock/ckinit.c, clock/.cvsignore, Makefile.am,
README, bsp_specs, console/Makefile.am, console/console.c,
console/.cvsignore, include/Makefile.am, include/bsp.h,
include/coverhd.h, include/syscall.h, include/ramdisk.h,
include/.cvsignore, start/Makefile.am, start/start.S,
start/.cvsignore, startup/Makefile.am, startup/bspstart.c,
startup/hw_init.c, startup/linkcmds, startup/linkcmds-le,
startup/linkcmds-le.coff, startup/.cvsignore, timer/Makefile.am,
timer/timer.c, timer/.cvsignore, wrapup/Makefile.am, wrapup/.cvsignore,
configure.ac, .cvsignore, ChangeLog: New files.
Reviewed and updated to latest automake and autoconf standards
by Ralf Corsepius <corsepiu@faw.uni-ulm.de>.
Diffstat (limited to 'c/src/lib/libbsp/sh/simsh4/timer/timer.c')
-rw-r--r-- | c/src/lib/libbsp/sh/simsh4/timer/timer.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/sh/simsh4/timer/timer.c b/c/src/lib/libbsp/sh/simsh4/timer/timer.c new file mode 100644 index 0000000000..d8feb88e0a --- /dev/null +++ b/c/src/lib/libbsp/sh/simsh4/timer/timer.c @@ -0,0 +1,111 @@ +/* + * Timer Init + * + * This module implements benchmark stub for simulator. + * + * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia + * Author: Victor V. Vengerov <vvv@oktet.ru> + * + * COPYRIGHT (c) 1989-1998-2001. + * 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> +#include <bsp.h> + +rtems_unsigned32 Timer_interrupts; + +rtems_boolean Timer_driver_Find_average_overhead; + +/* External assembler interrupt handler routine */ +extern rtems_isr timerisr(rtems_vector_number vector); + + +/* Timer_initialize -- + * Initialize timer 2 for accurate time measurement. + * + * PARAMETERS: + * none + * + * RETURNS: + * none + */ +void +Timer_initialize(void) +{ + return; +} + +/* + * 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 2.0 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 */ + +/* Read_timer -- + * Read timer value in microsecond units since timer start. + * + * PARAMETERS: + * none + * + * RETURNS: + * number of microseconds since timer has been started + */ +int +Read_timer( void ) +{ + return 0; +} + + +/* Empty_function -- + * Empty function call used in loops to measure basic cost of looping + * in Timing Test Suite. + * + * PARAMETERS: + * none + * + * RETURNS: + * RTEMS_SUCCESSFUL + */ +rtems_status_code +Empty_function(void) +{ + return RTEMS_SUCCESSFUL; +} + +/* Set_find_average_overhead -- + * This routine is invoked by the "Check Timer" (tmck) test in the + * RTEMS Timing Test Suite. It makes the Read_timer routine not + * subtract the overhead required to initialize and read the benchmark + * timer. + * + * PARAMETERS: + * find_flag - boolean flag, TRUE if overhead must not be subtracted. + * + * RETURNS: + * none + */ +void +Set_find_average_overhead(rtems_boolean find_flag) +{ + Timer_driver_Find_average_overhead = find_flag; +} |