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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [mvme136/] [timer/] [timerisr.S] - Blame information for rev 30

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/*  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) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  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: timerisr.S,v 1.2 2001-09-27 12:00:14 chris Exp $
 */
 
#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

Line No.	Rev	Author	Line
1	30	unneback	`/* 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.OARcorp.com/rtems/license.html.`
17			`*`
18			`* $Id: timerisr.S,v 1.2 2001-09-27 12:00:14 chris Exp $`
19			`*/`
20
21			`#include "asm.h"`
22
23			`BEGIN_CODE`
24
25			`.set CT1_CMD_STATUS, 0xfffb000a \| port A`
26			`.set RELOAD, 0x24 \| clr IP & IUS,allow countdown`
27
28			`PUBLIC (timerisr)`
29			`SYM (timerisr):`
30			`movl a0,a7@- \| save a0`
31			`movl #CT1_CMD_STATUS,a0 \| a0 = addr of cmd status reg`
32			`movb #RELOAD,a0@ \| reload countdown`
33			`addql #1, SYM (Ttimer_val) \| increment timer value`
34			`movl a7@+,a0 \| save a0`
35			`rte`
36
37			`END_CODE`
38			`END`

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [mvme136/] [timer/] [timerisr.S] - Blame information for rev 30