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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/mvme136/timer/timerisr.s | |
download | rtems-ac7d5ef06a6d6e8d84abbd1f0b82162725f98326.tar.bz2 |
Initial revision
Diffstat (limited to 'c/src/lib/libbsp/m68k/mvme136/timer/timerisr.s')
-rw-r--r-- | c/src/lib/libbsp/m68k/mvme136/timer/timerisr.s | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/m68k/mvme136/timer/timerisr.s b/c/src/lib/libbsp/m68k/mvme136/timer/timerisr.s new file mode 100644 index 0000000000..a8f7e7b212 --- /dev/null +++ b/c/src/lib/libbsp/m68k/mvme136/timer/timerisr.s @@ -0,0 +1,39 @@ +# 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. +# +# $Id$ +# + +#include "asm.h" + +BEGIN_CODE + +.set CT1_CMD_STATUS, 0xfffb000a | port A +.set RELOAD, 0x24 | clr IP & IUS,allow countdown + + PUBLIC (timerisr) +SYM (timerisr): + movl a0,a7@- | save a0 + movl #CT1_CMD_STATUS,a0 | a0 = addr of cmd status reg + movb #RELOAD,a0@ | reload countdown + addql #1, SYM (Ttimer_val) | increment timer value + movl a7@+,a0 | save a0 + rte + +END_CODE +END |