osfmk/console/i386/kdasm.s

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