pexpert/i386/kdasm.s

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* CMU_ENDHIST */
  23 /*
  24  * Mach Operating System
  25  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  26  * All Rights Reserved.
  27  *
  28  * Permission to use, copy, modify and distribute this software and its
  29  * documentation is hereby granted, provided that both the copyright
  30  * notice and this permission notice appear in all copies of the
  31  * software, derivative works or modified versions, and any portions
  32  * thereof, and that both notices appear in supporting documentation.
  33  *
  34  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  35  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  36  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  37  *
  38  * Carnegie Mellon requests users of this software to return to
  39  *
  40  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  41  *  School of Computer Science
  42  *  Carnegie Mellon University
  43  *  Pittsburgh PA 15213-3890
  44  *
  45  * any improvements or extensions that they make and grant Carnegie Mellon
  46  * the rights to redistribute these changes.
  47  */
  48 /*
  49  */
  50
  51 /*
  52  * Some inline code to speed up major block copies to and from the
  53  * screen buffer.
  54  *
  55  * Copyright Ing. C. Olivetti & C. S.p.A. 1988, 1989.
  56  *  All rights reserved.
  57  *
  58  * orc!eugene   28 Oct 1988
  59  *
  60  */
  61 /*
  62  *   Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc.,
  63  * Cupertino, California.
  64  *
  65  *              All Rights Reserved
  66  *
  67  *   Permission to use, copy, modify, and distribute this software and
  68  * its documentation for any purpose and without fee is hereby
  69  * granted, provided that the above copyright notice appears in all
  70  * copies and that both the copyright notice and this permission notice
  71  * appear in supporting documentation, and that the name of Olivetti
  72  * not be used in advertising or publicity pertaining to distribution
  73  * of the software without specific, written prior permission.
  74  *
  75  *   OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
  76  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
  77  * IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
  78  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  79  * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
  80  * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION
  81  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  82  */
  83
  84 /* $ Header: $ */
  85
  86
  87
  88 /*
  89  * Function:    kd_slmwd()
  90  *
  91  *      This function "slams" a word (char/attr) into the screen memory using
  92  *      a block fill operation on the 386.
  93  *
  94  */
  95
  96 #define start 0x08(%ebp)
  97 #define count 0x0c(%ebp)
  98 #define value 0x10(%ebp)
  99
 100         .text
 101         .align  2
 102         .globl  _kd_slmwd
 103
 104 _kd_slmwd:
 105         pushl   %ebp
 106         movl    %esp, %ebp
 107         pushl   %edi
 108
 109         movl    start, %edi
 110         movl    count, %ecx
 111         movw    value, %ax
 112         cld
 113         rep
 114         stosw
 115
 116         popl    %edi
 117         leave
 118         ret
 119 #undef start
 120 #undef count
 121 #undef value
 122
 123 /*
 124  * "slam up"
 125  */
 126
 127 #define from  0x08(%ebp)
 128 #define to    0x0c(%ebp)
 129 #define count 0x10(%ebp)
 130         .align  2
 131         .globl  _kd_slmscu
 132
 133 _kd_slmscu:
 134         pushl   %ebp
 135         movl    %esp, %ebp
 136         pushl   %esi
 137         pushl   %edi
 138
 139         movl    from, %esi
 140         movl    to, %edi
 141         movl    count, %ecx
 142         cmpl    %edi, %esi
 143         cld
 144         rep
 145         movsw
 146
 147         popl    %edi
 148         popl    %esi
 149         leave
 150         ret
 151
 152 /*
 153  * "slam down"
 154  */
 155         .align  2
 156         .globl  _kd_slmscd
 157
 158 _kd_slmscd:
 159         pushl   %ebp
 160         movl    %esp, %ebp
 161         pushl   %esi
 162         pushl   %edi
 163
 164         movl    from, %esi
 165         movl    to, %edi
 166         movl    count, %ecx
 167         cmpl    %edi, %esi
 168         std
 169         rep
 170         movsw
 171         cld
 172
 173         popl    %edi
 174         popl    %esi
 175         leave
 176         ret
 177 #undef from
 178 #undef to
 179 #undef count