From 8f81248cb7168a0331b3417ea61c285d2a09906b Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Tue, 19 Dec 2000 16:54:36 +0000 Subject: 2000-12-19 Joel Sherrill * timer: New subdirectory. * timer/.cvsignore, timer/Makefile.am, timer/timer.c: New files. * tools/ChangeLog: New file. --- c/src/lib/libbsp/mips/jmr3904/ChangeLog | 6 ++ c/src/lib/libbsp/mips/jmr3904/timer/.cvsignore | 2 + c/src/lib/libbsp/mips/jmr3904/timer/Makefile.am | 33 +++++++++++ c/src/lib/libbsp/mips/jmr3904/timer/timer.c | 74 +++++++++++++++++++++++++ c/src/lib/libbsp/mips/jmr3904/tools/ChangeLog | 3 + 5 files changed, 118 insertions(+) create mode 100644 c/src/lib/libbsp/mips/jmr3904/timer/.cvsignore create mode 100644 c/src/lib/libbsp/mips/jmr3904/timer/Makefile.am create mode 100644 c/src/lib/libbsp/mips/jmr3904/timer/timer.c create mode 100644 c/src/lib/libbsp/mips/jmr3904/tools/ChangeLog diff --git a/c/src/lib/libbsp/mips/jmr3904/ChangeLog b/c/src/lib/libbsp/mips/jmr3904/ChangeLog index 5b438e2466..17dabc2a4c 100644 --- a/c/src/lib/libbsp/mips/jmr3904/ChangeLog +++ b/c/src/lib/libbsp/mips/jmr3904/ChangeLog @@ -1,3 +1,9 @@ +2000-12-19 Joel Sherrill + + * timer: New subdirectory. + * timer/.cvsignore, timer/Makefile.am, timer/timer.c: New files. + * tools/ChangeLog: New file. + 2000-12-19 Joel Sherrill * Makefile.am: Added tools subdirectory and removed commented out line. diff --git a/c/src/lib/libbsp/mips/jmr3904/timer/.cvsignore b/c/src/lib/libbsp/mips/jmr3904/timer/.cvsignore new file mode 100644 index 0000000000..282522db03 --- /dev/null +++ b/c/src/lib/libbsp/mips/jmr3904/timer/.cvsignore @@ -0,0 +1,2 @@ +Makefile +Makefile.in diff --git a/c/src/lib/libbsp/mips/jmr3904/timer/Makefile.am b/c/src/lib/libbsp/mips/jmr3904/timer/Makefile.am new file mode 100644 index 0000000000..53b53ebc99 --- /dev/null +++ b/c/src/lib/libbsp/mips/jmr3904/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/mips/jmr3904/timer/timer.c b/c/src/lib/libbsp/mips/jmr3904/timer/timer.c new file mode 100644 index 0000000000..f2fddab5ea --- /dev/null +++ b/c/src/lib/libbsp/mips/jmr3904/timer/timer.c @@ -0,0 +1,74 @@ +/* + * This file implements a benchmark timer using a TX39 timer. + * + * NOTE: On the simulator, the count directly reflects instructions. + * + * COPYRIGHT (c) 1989-2000. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in found in the file LICENSE in this distribution or at + * http://www.OARcorp.com/rtems/license.html. + * + * $Id$ + */ + +#include + +#include + +rtems_boolean Timer_driver_Find_average_overhead; + +void Timer_initialize() +{ + /* + * Programming the compare register as the maximum value should let + * it run long enough and accurate enough not to require an interrupt. + * but if it ever does generate an interrupt, we will simply fault. + * + * NOTE: This is identical to the clock driver initialization + * with the exception that the divider is disabled and + * the compare register is set to the maximum value. + */ + + TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_CCDR, 0x3 ); + TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_TRR, 0x0 ); + TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_CPRA, 0xFFFFFFFF ); + TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_TISR, 0x00 ); + TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_ITMR, 0x8001 ); + TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_TCR, 0xc0 ); + *((volatile unsigned32 *) 0xFFFFC01C) = 0x00000700; +} + +#define AVG_OVERHEAD 0 /* It typically takes 24 instructions */ + /* to start/stop the timer. */ +#define LEAST_VALID 1 /* Don't trust a value lower than this */ + /* tx39 simulator can count instructions. :) */ + +int Read_timer() +{ + rtems_unsigned32 total; + + TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_TCR, 0x03 ); + total = TX3904_TIMER_READ( TX3904_TIMER0_BASE, TX3904_TIMER_TRR ); + + 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; +} diff --git a/c/src/lib/libbsp/mips/jmr3904/tools/ChangeLog b/c/src/lib/libbsp/mips/jmr3904/tools/ChangeLog new file mode 100644 index 0000000000..3be3bc0128 --- /dev/null +++ b/c/src/lib/libbsp/mips/jmr3904/tools/ChangeLog @@ -0,0 +1,3 @@ +2000-12-19 Joel Sherrill + + * ChangeLog: New file. -- cgit v1.2.3