source: rtems/c/src/lib/libbsp/i386/pc386/timer/timerisr.S @ 441b90e

4.115
Last change on this file since 441b90e was ba64905, checked in by Joel Sherrill <joel.sherrill@…>, on Jan 28, 2011 at 8:35:34 PM

2011-01-28 Joel Sherrill <joel.sherrilL@…>

  • clock/rtc.c, console/console.c, console/inch.c, console/outch.c, include/bsp.h, include/crt.h, ne2000/ne2000.c, startup/bspcmdline.c, startup/bspstart.c, startup/ldsegs.S, timer/timer.c, timer/timerisr.S: Fix typo where license said found in found in.
  • Property mode set to 100644
File size: 2.1 KB
Line 
1/*-------------------------------------------------------------------------+
2| timerisr.s v1.1 - PC386 BSP - 1997/08/07
3+--------------------------------------------------------------------------+
4| This file contains the PC386 timer interrupt handler.
5+--------------------------------------------------------------------------+
6| (C) Copyright 1997 -
7| - NavIST Group - Real-Time Distributed Systems and Industrial Automation
8|
9| http://pandora.ist.utl.pt
10|
11| Instituto Superior Tecnico * Lisboa * PORTUGAL
12+--------------------------------------------------------------------------+
13| Disclaimer:
14|
15| This file is provided "AS IS" without warranty of any kind, either
16| expressed or implied.
17+--------------------------------------------------------------------------+
18| This code is base on:
19|   timerisr.s,v 1.5 1995/12/19 20:07:45 joel Exp - go32 BSP
20| With the following copyright notice:
21| **************************************************************************
22| *  COPYRIGHT (c) 1989-1999.
23| *  On-Line Applications Research Corporation (OAR).
24| *
25| *  The license and distribution terms for this file may be
26| *  found in the file LICENSE in this distribution or at
27| *  http://www.rtems.com/license/LICENSE.
28| **************************************************************************
29|
30|  $Id$
31+--------------------------------------------------------------------------*/
32
33#include <rtems/asm.h>
34
35BEGIN_CODE
36
37        EXTERN(Ttimer_val)
38
39/*-------------------------------------------------------------------------+
40|         Function: rtems_isr timerisr(rtems_vector_number);
41|      Description: ISR for the timer. The timer is set up to generate an
42|                   interrupt at maximum intervals.
43| Global Variables: None.
44|        Arguments: standard - see RTEMS documentation.
45|          Returns: standard return value - see RTEMS documentation.
46+--------------------------------------------------------------------------*/
47        PUBLIC(timerisr)
48SYM (timerisr):
49        incl    Ttimer_val      # another tick
50        pushl   eax
51        movb    $0x20, al
52        outb    al, $0x20       # signal generic End Of Interrupt (EOI) to PIC
53        popl    eax
54        iret
55
56END_CODE
57
58END
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