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timerisr.S @ f4fe0092

4.104.114.84.95

Last change on this file since f4fe0092 was f4fe0092, checked in by Joel Sherrill <joel.sherrill@…>, on 09/04/03 at 18:52:04

2003-09-04 Joel Sherrill <joel@…>

clock/ckinit.c, console/console.c, consolex/cTest.c, consolex/consolex.c, consolex/consolex.h, include/bsp.h, include/coverhd.h, include/tod.h, startup/bspclean.c, startup/bspstart.c, startup/linkcmds, timer/timer.c, timer/timerisr.S, tod/tod.c: URL for license changed.

File size: 1.3 KB

Line
1	/* timer_isr()
2	*
3	* This routine provides the ISR for the Z8036 timer on the MVME136
4	* board. The timer is set up to generate an interrupt at maximum
5	* intervals.
6	*
7	* Input parameters: NONE
8	*
9	* Output parameters: NONE
10	*
11	* COPYRIGHT (c) 1989-1999.
12	* On-Line Applications Research Corporation (OAR).
13	*
14	* The license and distribution terms for this file may be
15	* found in the file LICENSE in this distribution or at
16	* http://www.rtems.com/license/LICENSE.
17	*
18	* Modifications of respective RTEMS file: COPYRIGHT (c) 1994.
19	* EISCAT Scientific Association. M.Savitski
20	*
21	* This material is a part of the MVME162 Board Support Package
22	* for the RTEMS executive. Its licensing policies are those of the
23	* RTEMS above.
24	*
25	* $Id$
26	*/
27
28	#include "asm.h"
29
30	BEGIN_CODE
31
32	.set INTR_CLEAR_REG, 0xfff40074 \| interrupt clear register
33	.set RELOAD, 0x01000000 \| clear tick 1 interrupt
34
35	PUBLIC (Ttimer_val)
36	PUBLIC (timerisr)
37	SYM (timerisr):
38	move.l a0, -(a7) \| save a0
39	movea.l #INTR_CLEAR_REG, a0 \| a0 = addr of cmd status reg
40	ori.l #RELOAD, (a0) \| reload countdown
41	addq.l #1, SYM (Ttimer_val) \| increment timer value
42	move.l (a7)+, a0 \| restore a0
43	rte
44
45	END_CODE
46	END

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