diff options
| author | Jay Monkman <jtm@smoothsmoothie.com> | 2004-08-03 04:59:11 +0000 |
|---|---|---|
| committer | Jay Monkman <jtm@smoothsmoothie.com> | 2004-08-03 04:59:11 +0000 |
| commit | 3cfd52051fffed2ff9497283e7400480befc6d32 (patch) | |
| tree | 32f0dd0d021a9b5e46ee46ffbcd991c5ec17f725 /c/src/lib/libcpu/m68k/mcf5272/timer/timerisr.S | |
| parent | 2004-08-02 Ralf Corsepius <ralf_corsepius@rtems.org> (diff) | |
| download | rtems-3cfd52051fffed2ff9497283e7400480befc6d32.tar.bz2 | |
2004-08-02 Jay Monkman <jtm@lopingdog.com>
* Makefile.am, configure.ac: Added CSB360 BSP
* mcf5272/.cvsignore, mcf5272/ChangeLog, mcf5272/Makefile.am,
mcf5272/clock/.cvsignore, mcf5272/clock/ckinit.c,
mcf5272/include/.cvsignore, mcf5272/include/mcf5272.h,
mcf5272/timer/.cvsignore, mcf5272/timer/timer.c,
mcf5272/timer/timerisr.S: New files.
Diffstat (limited to '')
| -rw-r--r-- | c/src/lib/libcpu/m68k/mcf5272/timer/timerisr.S | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/m68k/mcf5272/timer/timerisr.S b/c/src/lib/libcpu/m68k/mcf5272/timer/timerisr.S new file mode 100644 index 0000000000..dcc9d439e5 --- /dev/null +++ b/c/src/lib/libcpu/m68k/mcf5272/timer/timerisr.S @@ -0,0 +1,50 @@ +/* + * Handle MCF5272 TIMER2 interrupts. + * + * All code in this routine is pure overhead which can perturb the + * accuracy of RTEMS' timing test suite. + * + * See also: Read_timer() + * + * 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. + * + * An external counter, Timer_interrupts, is incremented. + * + * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia + * Author: Victor V. Vengerov <vvv@oktet.ru> + * + * This file based on work: + * Author: + * David Fiddes, D.J@fiddes.surfaid.org + * http://www.calm.hw.ac.uk/davidf/coldfire/ + * + * 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. + * + * timerisr.S,v 1.1 2001/10/26 19:32:40 joel Exp + */ + +#include "asm.h" +#include "bsp.h" +/* +#include "mcf5272/mcf5272.h" +*/ + +BEGIN_CODE + PUBLIC(timerisr) +SYM(timerisr): + move.l a0, a7@- + move.b # (MCF5272_TER_REF + MCF5272_TER_CAP), (a0) + addq.l #1,SYM(Timer_interrupts) | increment timer value + move.l a7@+, a0 + rte +END_CODE +END |