xref: /xnu-12377.61.12/iokit/IOKit/platform/IOPlatformIO.h (revision 4d495c6e23c53686cf65f45067f79024cf5dcee8)
1*4d495c6eSApple OSS Distributions /*
2*4d495c6eSApple OSS Distributions  * Copyright (c) 2019 Apple Computer, Inc. All rights reserved.
3*4d495c6eSApple OSS Distributions  *
4*4d495c6eSApple OSS Distributions  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*4d495c6eSApple OSS Distributions  *
6*4d495c6eSApple OSS Distributions  * This file contains Original Code and/or Modifications of Original Code
7*4d495c6eSApple OSS Distributions  * as defined in and that are subject to the Apple Public Source License
8*4d495c6eSApple OSS Distributions  * Version 2.0 (the 'License'). You may not use this file except in
9*4d495c6eSApple OSS Distributions  * compliance with the License. The rights granted to you under the License
10*4d495c6eSApple OSS Distributions  * may not be used to create, or enable the creation or redistribution of,
11*4d495c6eSApple OSS Distributions  * unlawful or unlicensed copies of an Apple operating system, or to
12*4d495c6eSApple OSS Distributions  * circumvent, violate, or enable the circumvention or violation of, any
13*4d495c6eSApple OSS Distributions  * terms of an Apple operating system software license agreement.
14*4d495c6eSApple OSS Distributions  *
15*4d495c6eSApple OSS Distributions  * Please obtain a copy of the License at
16*4d495c6eSApple OSS Distributions  * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*4d495c6eSApple OSS Distributions  *
18*4d495c6eSApple OSS Distributions  * The Original Code and all software distributed under the License are
19*4d495c6eSApple OSS Distributions  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*4d495c6eSApple OSS Distributions  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*4d495c6eSApple OSS Distributions  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*4d495c6eSApple OSS Distributions  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*4d495c6eSApple OSS Distributions  * Please see the License for the specific language governing rights and
24*4d495c6eSApple OSS Distributions  * limitations under the License.
25*4d495c6eSApple OSS Distributions  *
26*4d495c6eSApple OSS Distributions  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*4d495c6eSApple OSS Distributions  */
28*4d495c6eSApple OSS Distributions 
29*4d495c6eSApple OSS Distributions #ifndef _IOKIT_PLATFORM_IOPLATFORMIO_H
30*4d495c6eSApple OSS Distributions #define _IOKIT_PLATFORM_IOPLATFORMIO_H
31*4d495c6eSApple OSS Distributions 
32*4d495c6eSApple OSS Distributions extern "C" {
33*4d495c6eSApple OSS Distributions #include <kern/kern_types.h>
34*4d495c6eSApple OSS Distributions }
35*4d495c6eSApple OSS Distributions 
36*4d495c6eSApple OSS Distributions #include <IOKit/IOService.h>
37*4d495c6eSApple OSS Distributions 
38*4d495c6eSApple OSS Distributions /*!
39*4d495c6eSApple OSS Distributions  * @class      IOPlatformIO
40*4d495c6eSApple OSS Distributions  * @abstract   The base class for platform I/O drivers, such as AppleARMIO.
41*4d495c6eSApple OSS Distributions  */
42*4d495c6eSApple OSS Distributions class IOPlatformIO : public IOService
43*4d495c6eSApple OSS Distributions {
44*4d495c6eSApple OSS Distributions 	OSDeclareAbstractStructors(IOPlatformIO);
45*4d495c6eSApple OSS Distributions 
46*4d495c6eSApple OSS Distributions public:
47*4d495c6eSApple OSS Distributions 	virtual bool start(IOService * provider) APPLE_KEXT_OVERRIDE;
48*4d495c6eSApple OSS Distributions 
49*4d495c6eSApple OSS Distributions 	/*!
50*4d495c6eSApple OSS Distributions 	 * @function   handlePlatformError
51*4d495c6eSApple OSS Distributions 	 * @abstract   Handler for platform-defined errors.
52*4d495c6eSApple OSS Distributions 	 * @discussion If the CPU reports an error that XNU does not know how
53*4d495c6eSApple OSS Distributions 	 *             to handle, such as a parity error or SError, XNU will
54*4d495c6eSApple OSS Distributions 	 *             invoke this method if there is an IOPlatformIO
55*4d495c6eSApple OSS Distributions 	 *             driver loaded.
56*4d495c6eSApple OSS Distributions 	 * @param far  Fault address provided by the CPU, if any.
57*4d495c6eSApple OSS Distributions 	 * @result     true if the exception was handled, false if not.
58*4d495c6eSApple OSS Distributions 	 */
59*4d495c6eSApple OSS Distributions 	virtual bool handlePlatformError(vm_offset_t far) = 0;
60*4d495c6eSApple OSS Distributions };
61*4d495c6eSApple OSS Distributions 
62*4d495c6eSApple OSS Distributions #endif /* ! _IOKIT_PLATFORM_IOPLATFORMIO_H */
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