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/i386/go32/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/i386/go32/timer/timerisr.S')
-rw-r--r-- | c/src/lib/libbsp/i386/go32/timer/timerisr.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i386/go32/timer/timerisr.S b/c/src/lib/libbsp/i386/go32/timer/timerisr.S new file mode 100644 index 0000000000..2e9ccf0dc7 --- /dev/null +++ b/c/src/lib/libbsp/i386/go32/timer/timerisr.S @@ -0,0 +1,41 @@ +/* timer_isr() + * + * This routine provides the ISR for the timer. The timer is set up + * to generate an interrupt at maximum intervals. + * + * 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 + + EXTERN(_Ttimer_val) + + PUBLIC(timerisr) + +SYM (timerisr): + addl $1,_Ttimer_val # another tick + push edx + push eax + movw $0x20,dx + mov edx,eax + outb al,(dx) # touch interrupt controller + pop eax + pop edx + iret + +END_CODE +END |