iokit/Kernel/IODeviceMemory.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_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 License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
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  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <IOKit/IODeviceMemory.h>
  30 #include <IOKit/IOSubMemoryDescriptor.h>
  31
  32 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  33
  34 IODeviceMemory * IODeviceMemory::withRange(
  35         IOPhysicalAddress       start,
  36         IOPhysicalLength        length )
  37 {
  38     return( (IODeviceMemory *) IOMemoryDescriptor::withAddressRange(
  39                         start, length, kIODirectionNone | kIOMemoryMapperNone, NULL ));
  40 }
  41
  42
  43 IODeviceMemory * IODeviceMemory::withSubRange(
  44         IODeviceMemory *        of,
  45         IOPhysicalAddress       offset,
  46         IOPhysicalLength        length )
  47 {
  48     return( (IODeviceMemory *) IOSubMemoryDescriptor::withSubRange(
  49                 of, offset, length, kIODirectionNone ));
  50 }
  51
  52
  53 OSArray * IODeviceMemory::arrayFromList(
  54         InitElement             list[],
  55         IOItemCount             count )
  56 {
  57     OSArray *           array;
  58     IODeviceMemory *    range;
  59     IOItemCount         i;
  60
  61     array = OSArray::withCapacity( count );
  62     if( 0 == array )
  63         return( 0);
  64
  65     for( i = 0; i < count; i++) {
  66         range = IODeviceMemory::withRange( list[i].start, list[i].length );
  67         if( range) {
  68             range->setTag( list[i].tag );
  69             array->setObject( range);
  70             range->release();
  71         } else {
  72             array->release();
  73             array = 0;
  74             break;
  75         }
  76     }
  77
  78     return( array );
  79 }
  80