/*
* Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This 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 OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * 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_LICENSE_OSREFERENCE_HEADER_END@
*/
#ifndef _IOBUFFERMEMORYDESCRIPTOR_H
#define _IOBUFFERMEMORYDESCRIPTOR_H
#include <IOKit/IOMemoryDescriptor.h>
enum {
- kIOMemoryDirectionMask = 0x0000000f,
kIOMemoryPhysicallyContiguous = 0x00000010,
kIOMemoryPageable = 0x00000020,
+ kIOMemoryPurgeable = 0x00000040,
kIOMemorySharingTypeMask = 0x000f0000,
kIOMemoryUnshared = 0x00000000,
- kIOMemoryKernelUserShared = 0x00010000,
+ kIOMemoryKernelUserShared = 0x00010000
};
#define _IOBUFFERMEMORYDESCRIPTOR_INTASKWITHOPTIONS_ 1
+/*!
+ @class IOBufferMemoryDescriptor
+ @abstract Provides a simple memory descriptor that allocates its own buffer memory.
+*/
class IOBufferMemoryDescriptor : public IOGeneralMemoryDescriptor
{
vm_size_t capacity,
vm_offset_t alignment,
task_t inTask);
-
OSMetaClassDeclareReservedUsed(IOBufferMemoryDescriptor, 0);
+
+#if !(defined(__ppc__) && defined(KPI_10_4_0_PPC_COMPAT))
+ virtual bool initWithPhysicalMask(
+ task_t inTask,
+ IOOptionBits options,
+ mach_vm_size_t capacity,
+ mach_vm_address_t alignment,
+ mach_vm_address_t physicalMask);
+ OSMetaClassDeclareReservedUsed(IOBufferMemoryDescriptor, 1);
+#else
OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 1);
+#endif
OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 2);
OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 3);
OSMetaClassDeclareReservedUnused(IOBufferMemoryDescriptor, 4);
vm_offset_t alignment = 1);
/*! @function inTaskWithOptions
- @abstract Create a memory buffer with memory descriptor for that buffer. Added in Mac OS X 10.2.
- @discussion 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 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.
+ @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:
- 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.
- kIOMemoryPageable - pass to request memory be non-wired - the default for kernel allocated memory is wired.
+ @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.
@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 An instance of class IOBufferMemoryDescriptor. To be released by the caller, which will free the memory desriptor and associated buffer. */
+ @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,
vm_size_t capacity,
vm_offset_t alignment = 1);
+#if !(defined(__ppc__) && defined(KPI_10_4_0_PPC_COMPAT))
+/*! @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.
+ @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);
+#endif
+
/*
* withCapacity:
*
*/
virtual bool appendBytes(const void *bytes, vm_size_t withLength);
- /*
- * getPhysicalSegment:
- *
- * Get the physical address of the buffer, relative to the current position.
- * If the current position is at the end of the buffer, a zero is returned.
- */
- virtual IOPhysicalAddress getPhysicalSegment(IOByteCount offset,
- IOByteCount * length);
+#if !(defined(__ppc__) && defined(KPI_10_4_0_PPC_COMPAT))
+ /* DEPRECATED */ virtual void * getVirtualSegment(IOByteCount offset,
+ /* DEPRECATED */ IOByteCount * length);
+#endif
};
#endif /* !_IOBUFFERMEMORYDESCRIPTOR_H */
projects / apple / xnu.git / blobdiff