From b21b0ab3e77d91fc32e4324d3dfaf57ce24096ab Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Mon, 13 Nov 2000 22:40:29 +0000 Subject: 2000-11-13 Jiri Gaisler * .cvsignore, ChangeLog, Makefile.am, README, bsp_specs, configure.in, times, clock/.cvsignore, clock/Makefile.am, clock/ckinit.c, console/.cvsignore, console/Makefile.am, console/console.c, console/consolereserveresources.c, console/debugputs.c, gnatsupp/.cvsignore, gnatsupp/Makefile.am, gnatsupp/gnatsupp.c, include/.cvsignore, include/Makefile.am, include/bsp.h, include/coverhd.h, include/leon.h, start/.cvsignore, start/Makefile.am, startup/.cvsignore, startup/Makefile.am, startup/boardinit.S, startup/linkcmds, startup/setvec.c, startup/spurious.c, timer/.cvsignore, timer/Makefile.am, timer/timer.c, tools/.cvsignore, tools/Makefile.am, tools/configure.in, tools/runtest.in, wrapup/.cvsignore, wrapup/Makefile.am: New file. --- c/src/lib/libbsp/sparc/leon/timer/.cvsignore | 2 + c/src/lib/libbsp/sparc/leon/timer/Makefile.am | 33 +++++++++++ c/src/lib/libbsp/sparc/leon/timer/timer.c | 84 +++++++++++++++++++++++++++ 3 files changed, 119 insertions(+) create mode 100644 c/src/lib/libbsp/sparc/leon/timer/.cvsignore create mode 100644 c/src/lib/libbsp/sparc/leon/timer/Makefile.am create mode 100644 c/src/lib/libbsp/sparc/leon/timer/timer.c (limited to 'c/src/lib/libbsp/sparc/leon/timer') diff --git a/c/src/lib/libbsp/sparc/leon/timer/.cvsignore b/c/src/lib/libbsp/sparc/leon/timer/.cvsignore new file mode 100644 index 0000000000..282522db03 --- /dev/null +++ b/c/src/lib/libbsp/sparc/leon/timer/.cvsignore @@ -0,0 +1,2 @@ +Makefile +Makefile.in diff --git a/c/src/lib/libbsp/sparc/leon/timer/Makefile.am b/c/src/lib/libbsp/sparc/leon/timer/Makefile.am new file mode 100644 index 0000000000..53b53ebc99 --- /dev/null +++ b/c/src/lib/libbsp/sparc/leon/timer/Makefile.am @@ -0,0 +1,33 @@ +## +## $Id$ +## + +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/compile.am +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/sparc/leon/timer/timer.c b/c/src/lib/libbsp/sparc/leon/timer/timer.c new file mode 100644 index 0000000000..190d4dd313 --- /dev/null +++ b/c/src/lib/libbsp/sparc/leon/timer/timer.c @@ -0,0 +1,84 @@ +/* timer.c + * + * This file implements a benchmark timer using timer 2. + * + * COPYRIGHT (c) 1989-1998. + * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. + * + * 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. + * + * Ported to LEON implementation of the SPARC by On-Line Applications + * Research Corporation (OAR) under contract to the European Space + * Agency (ESA). + * + * LEON modifications of respective RTEMS file: COPYRIGHT (c) 1995. + * European Space Agency. + * + * $Id$ + */ + + +#include + +rtems_boolean Timer_driver_Find_average_overhead; + +rtems_boolean Timer_driver_Is_initialized = FALSE; + +void Timer_initialize() +{ + /* + * Timer runs long and accurate enough not to require an interrupt. + */ + + if ( Timer_driver_Is_initialized == FALSE ) { + + /* approximately 1 us per countdown */ + LEON_REG.Timer_Counter_2 = 0xffffff; + LEON_REG.Timer_Reload_2 = 0xffffff; + + } else { + Timer_driver_Is_initialized = TRUE; + } + + LEON_REG.Timer_Control_2 = ( + LEON_REG_TIMER_COUNTER_ENABLE_COUNTING | + LEON_REG_TIMER_COUNTER_LOAD_COUNTER + ); + +} + +#define AVG_OVERHEAD 3 /* It typically takes 3.0 microseconds */ + /* to start/stop the timer. */ +#define LEAST_VALID 2 /* Don't trust a value lower than this */ + +int Read_timer() +{ + rtems_unsigned32 total; + + total = LEON_REG.Timer_Counter_2; + + total = 0xffffff - total; + + if ( Timer_driver_Find_average_overhead == 1 ) + return total; /* in one microsecond units */ + + if ( total < LEAST_VALID ) + return 0; /* below timer resolution */ + + return total - AVG_OVERHEAD; +} + +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; +} -- cgit v1.2.3