icu_ipl.s

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    1 /*-
    2  * Copyright (c) 1989, 1990 William F. Jolitz.
    3  * Copyright (c) 1990 The Regents of the University of California.
    4  * All rights reserved.
    5  *
    6  * This code is derived from software contributed to Berkeley by
    7  * William Jolitz.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed by the University of
   20  *      California, Berkeley and its contributors.
   21  * 4. Neither the name of the University nor the names of its contributors
   22  *    may be used to endorse or promote products derived from this software
   23  *    without specific prior written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   35  * SUCH DAMAGE.
   36  *
   37  * $FreeBSD: releng/5.0/sys/i386/isa/icu_ipl.s 93945 2002-04-06 08:25:05Z nyan $
   38  */
   39 
   40         .data
   41         ALIGN_DATA
   42 
   43 /* interrupt mask enable (all h/w off) */
   44         .globl  imen
   45 imen:   .long   HWI_MASK
   46 
   47         .text
   48         SUPERALIGN_TEXT
   49 
   50 ENTRY(INTREN)
   51         movl    4(%esp), %eax
   52         movl    %eax, %ecx
   53         notl    %eax
   54         andl    %eax, imen
   55         movl    imen, %eax
   56         testb   %cl, %cl
   57         je      1f
   58         outb    %al, $(IO_ICU1 + ICU_IMR_OFFSET)
   59 1:
   60         testb   %ch, %ch
   61         je      2f
   62         shrl    $8, %eax
   63         outb    %al, $(IO_ICU2 + ICU_IMR_OFFSET)
   64 2:
   65         ret
   66 
   67 ENTRY(INTRDIS)
   68         movl    4(%esp), %eax
   69         movl    %eax, %ecx
   70         orl     %eax, imen
   71         movl    imen, %eax
   72         testb   %cl, %cl
   73         je      1f
   74         outb    %al, $(IO_ICU1 + ICU_IMR_OFFSET)
   75 1:
   76         testb   %ch, %ch
   77         je      2f
   78         shrl    $8, %eax
   79         outb    %al, $(IO_ICU2 + ICU_IMR_OFFSET)
   80 2:
   81         ret

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sys/i386/isa/icu_ipl.s