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Annotation of kernel/bsd/dev/i386/dma.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /*
        !            26:  * Copyright (c) 1992 NeXT Computer, Inc.
        !            27:  *
        !            28:  * Dummy file for now.
        !            29:  *
        !            30:  * HISTORY
        !            31:  *
        !            32:  * 9 July 1992 ? at NeXT
        !            33:  *     Created.
        !            34:  */
        !            35: 
        !            36: /*     @(#)dma.h       1.0     08/12/87        (c) 1987 NeXT   */
        !            37: 
        !            38: /* 
        !            39:  **********************************************************************
        !            40:  * HISTORY
        !            41:  *
        !            42:  * 26-Sep-89  John Seamons (jks) at NeXT
        !            43:  *     Made dd_csr in struct dma_dev an int (and changed the corresponding
        !            44:  *     register #defines) because this register responds as a 32-bit device
        !            45:  *     and therefore needs to be accessed this way to work on the 68040.
        !            46:  *
        !            47:  * 12-Apr-88  John Seamons (jks) at NeXT
        !            48:  *     Changes to support DMA chip 313.
        !            49:  *
        !            50:  * 12-Aug-87  Mike DeMoney (mike) at NeXT
        !            51:  *     Created.
        !            52:  *
        !            53:  **********************************************************************
        !            54:  */ 
        !            55: 
        !            56: /*
        !            57:  * dma.h -- description of NeXT dma structures
        !            58:  */
        !            59:  
        !            60: #if    KERNEL_PRIVATE
        !            61: 
        !            62: #ifndef        _I386_DEV_DMA_
        !            63: #define        _I386_DEV_DMA_
        !            64: 
        !            65: #define        DMA_BEGINALIGNMENT      1 
        !            66: #define        DMA_ENDALIGNMENT        1
        !            67: 
        !            68: #define        DMA_BEGINALIGN(type, addr)      \
        !            69:        ((type)(((unsigned)(addr)+DMA_BEGINALIGNMENT-1) \
        !            70:                &~(DMA_BEGINALIGNMENT-1)))
        !            71: 
        !            72: #define        DMA_ENDALIGN(type, addr)        \
        !            73:        ((type)(((unsigned)(addr)+DMA_ENDALIGNMENT-1) \
        !            74:                &~(DMA_ENDALIGNMENT-1)))
        !            75: #define        DMA_BEGINALIGNED(addr)  (((unsigned)(addr)&(DMA_BEGINALIGNMENT-1))==0)
        !            76: #define        DMA_ENDALIGNED(addr)    (((unsigned)(addr)&(DMA_ENDALIGNMENT-1))==0)
        !            77: #define        DMA_LONGALIGNED(addr)   (((unsigned)(addr)&(DMA_LONGALIGNMENT-1))==0)
        !            78: 
        !            79: #endif /* _I386_DEV_DMA_ */
        !            80: 
        !            81: #endif

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