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Annotation of XNU/pexpert/i386/kdasm.s, revision 1.1

1.1     ! root        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  [email protected]
        !            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

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