sys/platform/pc32/icu/icu_ipl.s

   1 /*
   2  * Copyright (c) 2003,2004 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * Copyright (c) 1989, 1990 William F. Jolitz.
  35  * Copyright (c) 1990 The Regents of the University of California.
  36  * All rights reserved.
  37  *
  38  * This code is derived from software contributed to Berkeley by
  39  * William Jolitz.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *      This product includes software developed by the University of
  52  *      California, Berkeley and its contributors.
  53  * 4. Neither the name of the University nor the names of its contributors
  54  *    may be used to endorse or promote products derived from this software
  55  *    without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  58  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  59  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  60  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  61  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  62  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  63  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  64  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  65  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  *
  69  * $FreeBSD: src/sys/i386/isa/icu_ipl.s,v 1.6 1999/08/28 00:44:42 peter Exp $
  70  * $DragonFly: src/sys/platform/pc32/icu/icu_ipl.s,v 1.18 2007/07/07 12:25:26 sephe Exp $
  71  */
  72
  73 #include "use_npx.h"
  74
  75 #include <machine/asmacros.h>
  76 #include <machine/segments.h>
  77 #include <machine/lock.h>
  78 #include <machine/psl.h>
  79 #include <machine/trap.h>
  80
  81 #include <bus/isa/isareg.h>
  82 #include "assym.s"
  83 #include "icu_ipl.h"
  84
  85 /*
  86  * WARNING!  SMP builds can use the ICU now so this code must be MP safe.
  87  */
  88
  89 #ifndef APIC_IO
  90
  91         .data
  92         ALIGN_DATA
  93
  94         /*
  95          * Interrupt mask for ICU interrupts, defaults to all hardware
  96          * interrupts turned off.
  97          */
  98         .p2align 2                      /* MUST be 32bit aligned */
  99
 100         .globl  icu_imen
 101 icu_imen:
 102         .long   ICU_HWI_MASK
 103
 104         .text
 105         SUPERALIGN_TEXT
 106
 107         /*
 108          * Functions to enable and disable a hardware interrupt.  Only
 109          * 16 ICU interrupts exist.
 110          *
 111          * INTREN(irq)
 112          * INTRDIS(irq)
 113          */
 114 ENTRY(ICU_INTRDIS)
 115         ICU_IMASK_LOCK
 116         movl    4(%esp),%eax
 117         btsl    %eax,icu_imen
 118         movl    icu_imen,%eax
 119         outb    %al,$IO_ICU1+ICU_IMR_OFFSET
 120         mov     %ah,%al
 121         outb    %al,$IO_ICU2+ICU_IMR_OFFSET
 122         ICU_IMASK_UNLOCK
 123         ret
 124
 125 ENTRY(ICU_INTREN)
 126         ICU_IMASK_LOCK
 127         movl    4(%esp),%eax
 128         btrl    %eax,icu_imen
 129         movl    icu_imen,%eax
 130         outb    %al,$IO_ICU1+ICU_IMR_OFFSET
 131         mov     %ah,%al
 132         outb    %al,$IO_ICU2+ICU_IMR_OFFSET
 133         ICU_IMASK_UNLOCK
 134         ret
 135
 136 #endif