FreeBSD/Linux Kernel Cross Reference
sys/i386at/kdasm.s

     /* 
      * Mach Operating System
      * Copyright (c) 1991,1990,1989 Carnegie Mellon University
      * All Rights Reserved.
      * 
      * Permission to use, copy, modify and distribute this software and its
      * documentation is hereby granted, provided that both the copyright
      * notice and this permission notice appear in all copies of the
      * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    /* 
     * HISTORY
     * $Log:        kdasm.s,v $
     * Revision 2.7  91/10/07  17:26:05  af
     *      From 2.5: Always set "direction bit" before rep.
     *              ([91/05/03            rvb])
     *      [91/09/04            rvb]
     * 
     * Revision 2.6  91/05/14  16:28:01  mrt
     *      Correcting copyright
     * 
     * Revision 2.5  91/02/14  14:43:32  mrt
     *      Follow dbg's lead.
     *      [91/01/15            rvb]
     * 
     * Revision 2.4  91/02/05  17:19:37  mrt
     *      Changed to new Mach copyright
     *      [91/02/01  17:46:06  mrt]
     * 
     * Revision 2.3  90/11/26  14:50:39  rvb
     *      jsb bet me to XMK34, sigh ...
     *      [90/11/26            rvb]
     *      Synched 2.5 & 3.0 at I386q (r2.2.1.4) & XMK35 (r2.3)
     *      [90/11/15            rvb]
     * 
     * Revision 2.2  90/05/03  15:45:07  dbg
     *      First checkin.
     * 
     * Revision 2.2.1.3  90/02/28  15:50:42  rvb
     *      Fix numerous typo's in Olivetti disclaimer.
     *      [90/02/28            rvb]
     * 
     * Revision 2.2.1.2  90/01/08  13:30:38  rvb
     *      Add Olivetti copyright.
     *      [90/01/08            rvb]
     * 
     * Revision 2.2.1.1  89/10/22  11:34:35  rvb
     *      New a.out and coff compatible .s files.
     *      [89/10/16            rvb]
     * 
     * Revision 2.2  89/04/05  13:02:14  rvb
     *      Converted to real asm file.
     *      [89/03/04            rvb]
     * 
     * Revision 1.3  89/02/26  12:37:20  gm0w
     *      Changes for cleanup.
     * 
     */
     
    /* 
     * Some inline code to speed up major block copies to and from the
     * screen buffer.
     * 
     * Copyright Ing. C. Olivetti & C. S.p.A. 1988, 1989.
     *  All rights reserved.
     *
     * orc!eugene   28 Oct 1988
     *
     */
    /*
      Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc.,
    Cupertino, California.
    
                    All Rights Reserved
    
      Permission to use, copy, modify, and distribute this software and
    its documentation for any purpose and without fee is hereby
    granted, provided that the above copyright notice appears in all
    copies and that both the copyright notice and this permission notice
    appear in supporting documentation, and that the name of Olivetti
    not be used in advertising or publicity pertaining to distribution
    of the software without specific, written prior permission.
    
      OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
   INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
   IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
   CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
   LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
   NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION
   WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
   
   /* $ Header: $ */
   
    
   #include <i386/asm.h>
   
   /*
    * Function:    kd_slmwd()
    *
    *      This function "slams" a word (char/attr) into the screen memory using
    *      a block fill operation on the 386.
    *
    */
   
   #define start 0x08(%ebp)
   #define count 0x0c(%ebp)
   #define value 0x10(%ebp)
   
   ENTRY(kd_slmwd)
           pushl   %ebp
           movl    %esp, %ebp
           pushl   %edi
   
           movl    start, %edi
           movl    count, %ecx
           movw    value, %ax
           cld
           rep
           stosw
   
           popl    %edi
           leave
           ret
   #undef start
   #undef count
   #undef value
   
   /*
    * "slam up"
    */
   
   #define from  0x08(%ebp)
   #define to    0x0c(%ebp)
   #define count 0x10(%ebp)
   ENTRY(kd_slmscu)
           pushl   %ebp
           movl    %esp, %ebp
           pushl   %esi
           pushl   %edi
   
           movl    from, %esi
           movl    to, %edi
           movl    count, %ecx
           cmpl    %edi, %esi
           cld
           rep
           movsw
   
           popl    %edi
           popl    %esi
           leave
           ret
   
   /*
    * "slam down"
    */
   ENTRY(kd_slmscd)
           pushl   %ebp
           movl    %esp, %ebp
           pushl   %esi
           pushl   %edi
   
           movl    from, %esi
           movl    to, %edi
           movl    count, %ecx
           cmpl    %edi, %esi
           std
           rep
           movsw
           cld
   
           popl    %edi
           popl    %esi
           leave
           ret
   #undef from
   #undef to
   #undef count

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