Cider Isn't Darwin Emulation, Really
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278/* * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */#ifndef _IOBUFFERMEMORYDESCRIPTOR_H#define _IOBUFFERMEMORYDESCRIPTOR_H
#include <IOKit/IOMemoryDescriptor.h>
enum { kIOMemoryPhysicallyContiguous = 0x00000010, kIOMemoryPageable = 0x00000020, kIOMemoryPurgeable = 0x00000040, kIOMemoryHostPhysicallyContiguous = 0x00000080, kIOMemorySharingTypeMask = 0x000f0000, kIOMemoryUnshared = 0x00000000, kIOMemoryKernelUserShared = 0x00010000, // shared IOMemoryDescriptor options for IOBufferMemoryDescriptor: kIOBufferDescriptorMemoryFlags = kIOMemoryDirectionMask #ifdef XNU_KERNEL_PRIVATE | kIOMemoryAutoPrepare#endif | kIOMemoryThreadSafe | kIOMemoryClearEncrypt | kIOMemoryMapperNone};
#define _IOBUFFERMEMORYDESCRIPTOR_INTASKWITHOPTIONS_ 1#define _IOBUFFERMEMORYDESCRIPTOR_HOSTPHYSICALLYCONTIGUOUS_ 1/*! @class IOBufferMemoryDescriptor @abstract Provides a simple memory descriptor that allocates its own buffer memory.*/
class IOBufferMemoryDescriptor : public IOGeneralMemoryDescriptor{ OSDeclareDefaultStructors(IOBufferMemoryDescriptor);
private:/*! @struct ExpansionData @discussion This structure will be used to expand the capablilties of this class in the future. */ struct ExpansionData { IOMemoryMap * map; };
/*! @var reserved Reserved for future use. (Internal use only) */ ExpansionData * reserved;
protected: void * _buffer; vm_size_t _capacity; vm_offset_t _alignment; IOOptionBits _options;private: uintptr_t _internalReserved; unsigned _internalFlags;
private:#ifndef __LP64__ virtual bool initWithOptions( IOOptionBits options, vm_size_t capacity, vm_offset_t alignment, task_t inTask) APPLE_KEXT_DEPRECATED; /* use withOptions() instead */#endif /* !__LP64__ */
public: virtual bool initWithPhysicalMask( task_t inTask, IOOptionBits options, mach_vm_size_t capacity, mach_vm_address_t alignment, mach_vm_address_t physicalMask);
#ifdef __LP64__ OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 0); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 1);#else /* !__LP64__ */ OSMetaClassDeclareReservedUsed(IOBufferMemoryDescriptor, 0); OSMetaClassDeclareReservedUsed(IOBufferMemoryDescriptor, 1);#endif /* !__LP64__ */ OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 2); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 3); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 4); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 5); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 6); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 7); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 8); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 9); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 10); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 11); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 12); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 13); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 14); OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 15);
protected: virtual void free() APPLE_KEXT_OVERRIDE;
public:
/* * withOptions: * * Returns a new IOBufferMemoryDescriptor with a buffer large enough to * hold capacity bytes. The descriptor's length is initially set to the * capacity. */#ifndef __LP64__ virtual bool initWithOptions( IOOptionBits options, vm_size_t capacity, vm_offset_t alignment) APPLE_KEXT_DEPRECATED; /* use withOptions() instead */#endif /* !__LP64__ */
static IOBufferMemoryDescriptor * withOptions( IOOptionBits options, vm_size_t capacity, vm_offset_t alignment = 1);
/*! @function inTaskWithOptions @abstract Creates a memory buffer with memory descriptor for that buffer. @discussion Added in Mac OS X 10.2, this method allocates a memory buffer with a given size and alignment in the task's address space specified, and returns a memory descriptor instance representing the memory. It is recommended that memory allocated for I/O or sharing via mapping be created via IOBufferMemoryDescriptor. Options passed with the request specify the kind of memory to be allocated - pageablity and sharing are specified with option bits. This function may block and so should not be called from interrupt level or while a simple lock is held. @param inTask The task the buffer will be allocated in. @param options Options for the allocation:<br> kIODirectionOut, kIODirectionIn - set the direction of the I/O transfer.<br> kIOMemoryPhysicallyContiguous - pass to request memory be physically contiguous. This option is heavily discouraged. The request may fail if memory is fragmented, may cause large amounts of paging activity, and may take a very long time to execute.<br> kIOMemoryPageable - pass to request memory be non-wired - the default for kernel allocated memory is wired.<br> kIOMemoryPurgeable - pass to request memory that may later have its purgeable state set with IOMemoryDescriptor::setPurgeable. Only supported for kIOMemoryPageable allocations.<br> kIOMemoryKernelUserShared - pass to request memory that will be mapped into both the kernel and client applications.<br> kIOMapInhibitCache - allocate memory with inhibited cache setting. <br> kIOMapWriteThruCache - allocate memory with writethru cache setting. <br> kIOMapCopybackCache - allocate memory with copyback cache setting. <br> kIOMapWriteCombineCache - allocate memory with writecombined cache setting. @param capacity The number of bytes to allocate. @param alignment The minimum required alignment of the buffer in bytes - 1 is the default for no required alignment. For example, pass 256 to get memory allocated at an address with bits 0-7 zero. @result Returns an instance of class IOBufferMemoryDescriptor to be released by the caller, which will free the memory desriptor and associated buffer. */
static IOBufferMemoryDescriptor * inTaskWithOptions( task_t inTask, IOOptionBits options, vm_size_t capacity, vm_offset_t alignment = 1);
/*! @function inTaskWithPhysicalMask @abstract Creates a memory buffer with memory descriptor for that buffer. @discussion Added in Mac OS X 10.5, this method allocates a memory buffer with a given size and alignment in the task's address space specified, and returns a memory descriptor instance representing the memory. It is recommended that memory allocated for I/O or sharing via mapping be created via IOBufferMemoryDescriptor. Options passed with the request specify the kind of memory to be allocated - pageablity and sharing are specified with option bits. This function may block and so should not be called from interrupt level or while a simple lock is held. @param inTask The task the buffer will be mapped in. Pass NULL to create memory unmapped in any task (eg. for use as a DMA buffer). @param options Options for the allocation:<br> kIODirectionOut, kIODirectionIn - set the direction of the I/O transfer.<br> kIOMemoryPhysicallyContiguous - pass to request memory be physically contiguous. This option is heavily discouraged. The request may fail if memory is fragmented, may cause large amounts of paging activity, and may take a very long time to execute.<br> kIOMemoryKernelUserShared - pass to request memory that will be mapped into both the kernel and client applications.<br> kIOMapInhibitCache - allocate memory with inhibited cache setting. <br> kIOMapWriteThruCache - allocate memory with writethru cache setting. <br> kIOMapCopybackCache - allocate memory with copyback cache setting. <br> kIOMapWriteCombineCache - allocate memory with writecombined cache setting. @param capacity The number of bytes to allocate. @param mask The buffer will be allocated with pages such that physical addresses will only have bits set present in physicalMask. For example, pass 0x00000000FFFFFFFFULL for a buffer to be accessed by hardware that has 32 address bits. @result Returns an instance of class IOBufferMemoryDescriptor to be released by the caller, which will free the memory desriptor and associated buffer. */
static IOBufferMemoryDescriptor * inTaskWithPhysicalMask( task_t inTask, IOOptionBits options, mach_vm_size_t capacity, mach_vm_address_t physicalMask);
/* * withCapacity: * * Returns a new IOBufferMemoryDescriptor with a buffer large enough to * hold capacity bytes. The descriptor's length is initially set to the * capacity. */ static IOBufferMemoryDescriptor * withCapacity( vm_size_t capacity, IODirection withDirection, bool withContiguousMemory = false);#ifndef __LP64__ virtual bool initWithBytes(const void * bytes, vm_size_t withLength, IODirection withDirection, bool withContiguousMemory = false) APPLE_KEXT_DEPRECATED; /* use withBytes() instead */#endif /* !__LP64__ */
/* * withBytes: * * Returns a new IOBufferMemoryDescriptor preloaded with bytes (copied). * The descriptor's length and capacity are set to the input buffer's size. */ static IOBufferMemoryDescriptor * withBytes( const void * bytes, vm_size_t withLength, IODirection withDirection, bool withContiguousMemory = false);
/* * setLength: * * Change the buffer length of the memory descriptor. When a new buffer * is created, the initial length of the buffer is set to be the same as * the capacity. The length can be adjusted via setLength for a shorter * transfer (there is no need to create more buffer descriptors when you * can reuse an existing one, even for different transfer sizes). Note * that the specified length must not exceed the capacity of the buffer. */ virtual void setLength(vm_size_t length);
/* * setDirection: * * Change the direction of the transfer. This method allows one to redirect * the descriptor's transfer direction. This eliminates the need to destroy * and create new buffers when different transfer directions are needed. */ virtual void setDirection(IODirection direction);
/* * getCapacity: * * Get the buffer capacity */ virtual vm_size_t getCapacity() const;
/* * getBytesNoCopy: * * Return the virtual address of the beginning of the buffer */ virtual void *getBytesNoCopy();
/* * getBytesNoCopy: * * Return the virtual address of an offset from the beginning of the buffer */ virtual void *getBytesNoCopy(vm_size_t start, vm_size_t withLength);
/* * appendBytes: * * Add some data to the end of the buffer. This method automatically * maintains the memory descriptor buffer length. Note that appendBytes * will not copy past the end of the memory descriptor's current capacity. */ virtual bool appendBytes(const void *bytes, vm_size_t withLength);
#ifndef __LP64__ virtual void * getVirtualSegment(IOByteCount offset, IOByteCount * length) APPLE_KEXT_OVERRIDE APPLE_KEXT_DEPRECATED; /* use getBytesNoCopy() instead */#endif /* !__LP64__ */};
#endif /* !_IOBUFFERMEMORYDESCRIPTOR_H */