osfmk/console/i386/kdasm.s

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* CMU_ENDHIST */
  26 /*
  27  * Mach Operating System
  28  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  29  * All Rights Reserved.
  30  *
  31  * Permission to use, copy, modify and distribute this software and its
  32  * documentation is hereby granted, provided that both the copyright
  33  * notice and this permission notice appear in all copies of the
  34  * software, derivative works or modified versions, and any portions
  35  * thereof, and that both notices appear in supporting documentation.
  36  *
  37  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  38  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  39  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  40  *
  41  * Carnegie Mellon requests users of this software to return to
  42  *
  43  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  44  *  School of Computer Science
  45  *  Carnegie Mellon University
  46  *  Pittsburgh PA 15213-3890
  47  *
  48  * any improvements or extensions that they make and grant Carnegie Mellon
  49  * the rights to redistribute these changes.
  50  */
  51 /*
  52  */
  53
  54 /*
  55  * Some inline code to speed up major block copies to and from the
  56  * screen buffer.
  57  *
  58  * Copyright Ing. C. Olivetti & C. S.p.A. 1988, 1989.
  59  *  All rights reserved.
  60  *
  61  * orc!eugene   28 Oct 1988
  62  *
  63  */
  64 /*
  65  *   Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc.,
  66  * Cupertino, California.
  67  *
  68  *              All Rights Reserved
  69  *
  70  *   Permission to use, copy, modify, and distribute this software and
  71  * its documentation for any purpose and without fee is hereby
  72  * granted, provided that the above copyright notice appears in all
  73  * copies and that both the copyright notice and this permission notice
  74  * appear in supporting documentation, and that the name of Olivetti
  75  * not be used in advertising or publicity pertaining to distribution
  76  * of the software without specific, written prior permission.
  77  *
  78  *   OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
  79  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
  80  * IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
  81  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  82  * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
  83  * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION
  84  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  85  */
  86
  87 /* $ Header: $ */
  88
  89
  90
  91 /*
  92  * Function:    kd_slmwd()
  93  *
  94  *      This function "slams" a word (char/attr) into the screen memory using
  95  *      a block fill operation on the 386.
  96  *
  97  */
  98
  99 #define start 0x08(%ebp)
 100 #define count 0x0c(%ebp)
 101 #define value 0x10(%ebp)
 102
 103         .text
 104         .align  2
 105         .globl  _kd_slmwd
 106
 107 _kd_slmwd:
 108         pushl   %ebp
 109         movl    %esp, %ebp
 110         pushl   %edi
 111
 112         movl    start, %edi
 113         movl    count, %ecx
 114         movw    value, %ax
 115         cld
 116         rep
 117         stosw
 118
 119         popl    %edi
 120         leave
 121         ret
 122 #undef start
 123 #undef count
 124 #undef value
 125
 126 /*
 127  * "slam up"
 128  */
 129
 130 #define from  0x08(%ebp)
 131 #define to    0x0c(%ebp)
 132 #define count 0x10(%ebp)
 133         .align  2
 134         .globl  _kd_slmscu
 135
 136 _kd_slmscu:
 137         pushl   %ebp
 138         movl    %esp, %ebp
 139         pushl   %esi
 140         pushl   %edi
 141
 142         movl    from, %esi
 143         movl    to, %edi
 144         movl    count, %ecx
 145         cmpl    %edi, %esi
 146         cld
 147         rep
 148         movsw
 149
 150         popl    %edi
 151         popl    %esi
 152         leave
 153         ret
 154
 155 /*
 156  * "slam down"
 157  */
 158         .align  2
 159         .globl  _kd_slmscd
 160
 161 _kd_slmscd:
 162         pushl   %ebp
 163         movl    %esp, %ebp
 164         pushl   %esi
 165         pushl   %edi
 166
 167         movl    from, %esi
 168         movl    to, %edi
 169         movl    count, %ecx
 170         cmpl    %edi, %esi
 171         std
 172         rep
 173         movsw
 174         cld
 175
 176         popl    %edi
 177         popl    %esi
 178         leave
 179         ret
 180 #undef from
 181 #undef to
 182 #undef count