Enhance debugging (sync before MP work).
[dragonfly.git] / sys / platform / pc32 / isa / 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.
ef0fdad1 5 * Copyright (c) 2003 Matthew Dillon
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6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * $FreeBSD: src/sys/i386/isa/icu_ipl.s,v 1.6 1999/08/28 00:44:42 peter Exp $
ef0fdad1 39 * $DragonFly: src/sys/platform/pc32/isa/Attic/icu_ipl.s,v 1.5 2003/06/29 03:28:43 dillon Exp $
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40 */
41
42 .data
43 ALIGN_DATA
984263bc 44
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45 /*
46 * Interrupt mask for ICU interrupts, defaults to all hardware
47 * interrupts turned off.
48 */
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49 .globl _imen
50_imen: .long HWI_MASK
51
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52 .text
53 SUPERALIGN_TEXT
54
984263bc 55 /*
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56 * Functions to enable and disable a hardware interrupt. Only
57 * 16 ICU interrupts exist.
58 *
59 * INTREN(1 << irq) (one interrupt only)
60 * INTDIS(1 << irq) (one interrupt only)
984263bc 61 */
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62ENTRY(INTRDIS)
63 movl 4(%esp),%eax
64 orl %eax,_imen
984263bc 65 pushfl
984263bc 66 cli
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67 movl _imen,%eax
68 outb %al,$IO_ICU1+ICU_IMR_OFFSET
69 mov %ah,%al
70 outb %al,$IO_ICU2+ICU_IMR_OFFSET
71 popfl
72 ret
984263bc 73
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74ENTRY(INTREN)
75 movl 4(%esp),%eax
76 notl %eax
77 andl %eax,_imen
984263bc 78 pushfl
984263bc 79 cli
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80 movl _imen,%eax
81 outb %al,$IO_ICU1+ICU_IMR_OFFSET
82 mov %ah,%al
83 outb %al,$IO_ICU2+ICU_IMR_OFFSET
84 popfl
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85 ret
86
ef0fdad1 87