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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1995-05-11 17:39:37 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1995-05-11 17:39:37 +0000 |
commit | ac7d5ef06a6d6e8d84abbd1f0b82162725f98326 (patch) | |
tree | 9304cf759a73f2a1c6fd3191948f00e870af3787 /c/src/lib/libbsp/m68k/mvme162/timer/timerisr.s | |
download | rtems-ac7d5ef06a6d6e8d84abbd1f0b82162725f98326.tar.bz2 |
Initial revision
Diffstat (limited to 'c/src/lib/libbsp/m68k/mvme162/timer/timerisr.s')
-rw-r--r-- | c/src/lib/libbsp/m68k/mvme162/timer/timerisr.s | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/mvme162/timer/timerisr.s b/c/src/lib/libbsp/m68k/mvme162/timer/timerisr.s new file mode 100644 index 0000000000..af31e4276b --- /dev/null +++ b/c/src/lib/libbsp/m68k/mvme162/timer/timerisr.s @@ -0,0 +1,46 @@ +/* timer_isr() + * + * This routine provides the ISR for the Z8036 timer on the MVME136 + * board. The timer is set up to generate an interrupt at maximum + * intervals. + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + * + * Modifications of respective RTEMS file: COPYRIGHT (c) 1994. + * EISCAT Scientific Association. M.Savitski + * + * This material is a part of the MVME162 Board Support Package + * for the RTEMS executive. Its licensing policies are those of the + * RTEMS above. + * + * $Id$ + */ + +#include "asm.h" + +BEGIN_CODE + +.set INTR_CLEAR_REG, 0xfff40074 | interrupt clear register +.set RELOAD, 0x01000000 | clear tick 1 interrupt + + PUBLIC (timerisr) +SYM (timerisr): + move.l a0, -(a7) | save a0 + movea.l #INTR_CLEAR_REG, a0 | a0 = addr of cmd status reg + ori.l #RELOAD, (a0) | reload countdown + addq.l #1, SYM (Ttimer_val) | increment timer value + move.l (a7)+, a0 | restore a0 + rte + +END_CODE +END |