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Annotation of kernel/machdep/i386/dma_buf_internal.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:  * dma_buf_internal.h   -- DMA buffer handling internals.
        !            29:  *
        !            30:  * HISTORY
        !            31:  *
        !            32:  * 26 August 1992 ? at NeXT
        !            33:  *     Created.
        !            34:  */
        !            35: 
        !            36: typedef union dma_buf_region {
        !            37:     unsigned char              data[0];
        !            38:     union dma_buf_region       *next;
        !            39: } dma_buf_region_t;
        !            40:  
        !            41: typedef struct dma_buf_type {
        !            42:     dma_buf_region_t *         (*create_fcn)();
        !            43:     dma_buf_region_t *         free_head;
        !            44:     int                                free_count;
        !            45:     int                                total_count;
        !            46: } dma_buf_type_t;
        !            47: 
        !            48: static dma_buf_region_t                *dma_buf_sm_create(
        !            49:                                                        void);
        !            50: static dma_buf_region_t                *dma_buf_lg_create(
        !            51:                                                        void);

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