diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-12-14 23:15:38 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-12-14 23:15:38 +0000 |
commit | 01629105c2817a59a4f1f05039593f211cf5ddaa (patch) | |
tree | 76f6bb8f9ca6ddbd015e3b81964a8dacffaf5cf9 /c/src/lib/libbsp/m68k/idp/timer/timerisr.S | |
parent | Patch from Ralf Corsepius <corsepiu@faw.uni-ulm.de> to rename all (diff) | |
download | rtems-01629105c2817a59a4f1f05039593f211cf5ddaa.tar.bz2 |
Patch from Ralf Corsepius <corsepiu@faw.uni-ulm.de> to rename all
.s files to .S in conformance with GNU conventions. This is a
minor step along the way to supporting automake.
Diffstat (limited to 'c/src/lib/libbsp/m68k/idp/timer/timerisr.S')
-rw-r--r-- | c/src/lib/libbsp/m68k/idp/timer/timerisr.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/idp/timer/timerisr.S b/c/src/lib/libbsp/m68k/idp/timer/timerisr.S new file mode 100644 index 0000000000..74461f3714 --- /dev/null +++ b/c/src/lib/libbsp/m68k/idp/timer/timerisr.S @@ -0,0 +1,38 @@ +/* timer_isr() + * + * This routine provides the ISR for the MC68230 timer on the Motorola + * IDP board. The timer is set up to generate an interrupt at maximum + * intervals. + * + * Code modified by Doug McBride, Colorado Space Grant College + * countdown should be loaded automatically + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * 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. + * + * $Id$ + */ + +#include "asm.h" + +BEGIN_CODE + +.set TSR, 0x00c0106B | base address of PIT register "TSR" + + PUBLIC (timerisr) +SYM (timerisr): + movb #1,TSR | acknowledge interrupt + addql #1, SYM (Ttimer_val) | increment timer value + rte + +END_CODE +END |