iokit/Kernel/IODeviceMemory.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
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  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30
  31 #include <IOKit/IODeviceMemory.h>
  32
  33 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  34
  35 IODeviceMemory * IODeviceMemory::withRange(
  36         IOPhysicalAddress       start,
  37         IOPhysicalLength        length )
  38 {
  39     return( (IODeviceMemory *) IOMemoryDescriptor::withPhysicalAddress(
  40                         start, length, kIODirectionNone ));
  41 }
  42
  43
  44 IODeviceMemory * IODeviceMemory::withSubRange(
  45         IODeviceMemory *        of,
  46         IOPhysicalAddress       offset,
  47         IOPhysicalLength        length )
  48 {
  49     return( (IODeviceMemory *) IOMemoryDescriptor::withSubRange(
  50                 of, offset, length, kIODirectionNone ));
  51 }
  52
  53
  54 OSArray * IODeviceMemory::arrayFromList(
  55         InitElement             list[],
  56         IOItemCount             count )
  57 {
  58     OSArray *           array;
  59     IODeviceMemory *    range;
  60     IOItemCount         i;
  61
  62     array = OSArray::withCapacity( count );
  63     if( 0 == array )
  64         return( 0);
  65
  66     for( i = 0; i < count; i++) {
  67         range = IODeviceMemory::withRange( list[i].start, list[i].length );
  68         if( range) {
  69             range->setTag( list[i].tag );
  70             array->setObject( range);
  71             range->release();
  72         } else {
  73             array->release();
  74             array = 0;
  75             break;
  76         }
  77     }
  78
  79     return( array );
  80 }
  81