LXR darwin-xnu/iokit/Kernel/IODeviceMemory.cpp

   1/*
   2 * Copyright (c) 1998-2000 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
  23#include <IOKit/IODeviceMemory.h>
  24
  25/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  26
  27IODeviceMemory * IODeviceMemory::withRange( 
  28        IOPhysicalAddress       start,
  29        IOPhysicalLength        length )
  30{
  31    return( (IODeviceMemory *) IOMemoryDescriptor::withPhysicalAddress(
  32                        start, length, kIODirectionNone ));
  33}
  34
  35
  36IODeviceMemory * IODeviceMemory::withSubRange( 
  37        IODeviceMemory *        of,
  38        IOPhysicalAddress       offset,
  39        IOPhysicalLength        length )
  40{
  41    return( (IODeviceMemory *) IOMemoryDescriptor::withSubRange(
  42                of, offset, length, kIODirectionNone ));
  43}
  44
  45
  46OSArray * IODeviceMemory::arrayFromList(
  47        InitElement             list[],
  48        IOItemCount             count )
  49{
  50    OSArray *           array;
  51    IODeviceMemory *    range;
  52    IOItemCount         i;
  53
  54    array = OSArray::withCapacity( count );
  55    if( 0 == array )
  56        return( 0);
  57
  58    for( i = 0; i < count; i++) {
  59        range = IODeviceMemory::withRange( list[i].start, list[i].length );
  60        if( range) {
  61            range->setTag( list[i].tag );
  62            array->setObject( range);
  63            range->release();
  64        } else {
  65            array->release();
  66            array = 0;
  67            break;
  68        }
  69    }
  70
  71    return( array );
  72}
  73
  74