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Annotation of Gnu-Mach/i386/i386at/kdasm.S, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  * 
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  * 
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  * 
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  * 
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  * 
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: /* 
        !            27:  * Some inline code to speed up major block copies to and from the
        !            28:  * screen buffer.
        !            29:  * 
        !            30:  * Copyright Ing. C. Olivetti & C. S.p.A. 1988, 1989.
        !            31:  *  All rights reserved.
        !            32:  *
        !            33:  * orc!eugene  28 Oct 1988
        !            34:  *
        !            35:  */
        !            36: /*
        !            37:   Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc.,
        !            38: Cupertino, California.
        !            39: 
        !            40:                All Rights Reserved
        !            41: 
        !            42:   Permission to use, copy, modify, and distribute this software and
        !            43: its documentation for any purpose and without fee is hereby
        !            44: granted, provided that the above copyright notice appears in all
        !            45: copies and that both the copyright notice and this permission notice
        !            46: appear in supporting documentation, and that the name of Olivetti
        !            47: not be used in advertising or publicity pertaining to distribution
        !            48: of the software without specific, written prior permission.
        !            49: 
        !            50:   OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
        !            51: INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
        !            52: IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
        !            53: CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
        !            54: LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
        !            55: NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION
        !            56: WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            57: */
        !            58: 
        !            59: /* $ Header: $ */
        !            60: 
        !            61:  
        !            62: #include <mach/machine/asm.h>
        !            63: 
        !            64: /*
        !            65:  * Function:   kd_slmwd()
        !            66:  *
        !            67:  *     This function "slams" a word (char/attr) into the screen memory using
        !            68:  *     a block fill operation on the 386.
        !            69:  *
        !            70:  */
        !            71: 
        !            72: #define start 0x08(%ebp)
        !            73: #define count 0x0c(%ebp)
        !            74: #define value 0x10(%ebp)
        !            75: 
        !            76: ENTRY(kd_slmwd)
        !            77:        pushl   %ebp
        !            78:        movl    %esp, %ebp
        !            79:        pushl   %edi
        !            80: 
        !            81:        movl    start, %edi
        !            82:        movl    count, %ecx
        !            83:        movw    value, %ax
        !            84:        cld
        !            85:        rep
        !            86:        stosw
        !            87: 
        !            88:        popl    %edi
        !            89:        leave
        !            90:        ret
        !            91: #undef start
        !            92: #undef count
        !            93: #undef value
        !            94: 
        !            95: /*
        !            96:  * "slam up"
        !            97:  */
        !            98: 
        !            99: #define from  0x08(%ebp)
        !           100: #define to    0x0c(%ebp)
        !           101: #define count 0x10(%ebp)
        !           102: ENTRY(kd_slmscu)
        !           103:        pushl   %ebp
        !           104:        movl    %esp, %ebp
        !           105:        pushl   %esi
        !           106:        pushl   %edi
        !           107: 
        !           108:        movl    from, %esi
        !           109:        movl    to, %edi
        !           110:        movl    count, %ecx
        !           111:        cmpl    %edi, %esi
        !           112:        cld
        !           113:        rep
        !           114:        movsw
        !           115: 
        !           116:        popl    %edi
        !           117:        popl    %esi
        !           118:        leave
        !           119:        ret
        !           120: 
        !           121: /*
        !           122:  * "slam down"
        !           123:  */
        !           124: ENTRY(kd_slmscd)
        !           125:        pushl   %ebp
        !           126:        movl    %esp, %ebp
        !           127:        pushl   %esi
        !           128:        pushl   %edi
        !           129: 
        !           130:        movl    from, %esi
        !           131:        movl    to, %edi
        !           132:        movl    count, %ecx
        !           133:        cmpl    %edi, %esi
        !           134:        std
        !           135:        rep
        !           136:        movsw
        !           137:        cld
        !           138: 
        !           139:        popl    %edi
        !           140:        popl    %esi
        !           141:        leave
        !           142:        ret
        !           143: #undef from
        !           144: #undef to
        !           145: #undef count

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