iokit/IOKit/nvram/IONVRAMController.h

   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,
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  25  * Please see the License for the specific language governing rights and
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  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30
  31 #ifndef _IOKIT_IONVRAMCONTROLLER_H
  32 #define _IOKIT_IONVRAMCONTROLLER_H
  33
  34 #include <IOKit/IOService.h>
  35
  36 class IONVRAMController: public IOService
  37 {
  38   OSDeclareAbstractStructors(IONVRAMController);
  39
  40 public:
  41   virtual bool start(IOService *provider);
  42
  43   virtual void sync(void);
  44
  45   virtual IOReturn read(IOByteCount offset, UInt8 *buffer,
  46                         IOByteCount length) = 0;
  47   virtual IOReturn write(IOByteCount offset, UInt8 *buffer,
  48                          IOByteCount length) = 0;
  49 };
  50
  51 #endif /* !_IOKIT_IONVRAMCONTROLLER_H */