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DBDMA.idl
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1996-05-01
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/*
File: DBDMA.idl
Contains: Descriptor Based DMA Interfaces
Version: Technology: System 7.5
Release: Universal Interfaces 3.0d3 on Copland DR1
Copyright: © 1984-1996 by Apple Computer, Inc. All rights reserved.
Bugs?: If you find a problem with this file, send the file and version
information (from above) and the problem description to:
Internet: apple.bugs@applelink.apple.com
AppleLink: APPLE.BUGS
*/
#ifndef __DBDMA_IDL__
#define __DBDMA_IDL__
#include <somobj.idl>
#include <somcls.idl>
#ifndef __CONDITIONALMACROS_IDL__
#include <ConditionalMacros.idl>
#endif
#ifndef __PCI_IDL__
#include <PCI.idl>
#endif
#if FOR_SYSTEM8_PREEMPTIVE
#ifndef __CODEFRAGMENTS_IDL__
#include <CodeFragments.idl>
#endif
#ifndef __DRIVERSERVICES_IDL__
#include <DriverServices.idl>
#endif
#endif
#ifdef __SOMIDL__
#if FOR_SYSTEM7_AND_SYSTEM8_PREEMPTIVE
/* This structure defines the standard set of DB-DMA channel registers.*/
typedef SOMLargeStruct DBDMAChannelRegisters; /* Derived from a struct of 256 bytes in size */
/* These constants define the DB-DMA channel control words and status flags.*/
/*
This structure defines the DB-DMA channel command descriptor.
*** WARNING: Endian-ness issues must be considered when performing load/store! ***
*** DB-DMA specifies memory organization as quadlets so it is not correct
*** to think of either the operation or result field as two 16-bit fields.
*** This would have undesirable effects on the byte ordering within their
*** respective quadlets. Use the accessor macros provided below.
*/
typedef SOMLargeStruct DBDMADescriptor; /* Derived from a struct of 16 bytes in size */
typedef OpaquePtr DBDMADescriptorPtr; /* Substituted OpaquePtr for ``DBDMADescriptor*'' */
/* These constants define the DB-DMA channel command operations and modifiers.*/
/* These constants define the DB-DMA channel command results.*/
#if FOR_SYSTEM8_PREEMPTIVE
typedef OpaquePtr DBDMAChannelConnectionPtr; /* Substituted OpaquePtr for ``void*'' */
/*
/////////////////////////////////////////////////////////////////////////////////
Channel Connections
*/
/*
/////////////////////////////////////////////////////////////////////////////////
Client Buffer Assignment
*/
/*
/////////////////////////////////////////////////////////////////////////////////
Channel Control Operations
*/
#endif
#endif
#endif /* __SOMIDL__ */
#endif /* __DBDMA_IDL__ */