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Commit	Line	Data
	1	/*
	2	* Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_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 License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28	// 45678901234567890123456789012345678901234567890123456789012345678901234567890
	29
	30	#include <libkern/OSAtomic.h>
	31
	32	#include <IOKit/IOLocks.h>
	33	#include <IOKit/IOPlatformExpert.h>
	34	#include <IOKit/IODeviceTreeSupport.h>
	35	#include <IOKit/IOMapper.h>
	36
	37	// General constants about all VART/DART style Address Re-Mapping Tables
	38	#define kMapperPage (4 * 1024)
	39	#define kTransPerPage (kMapperPage / sizeof(ppnum_t))
	40
	41	#define kMinZoneSize 4 // Minimum Zone size in pages
	42	#define kMaxNumZones (31 - 14) // 31 bit mapped in 16K super pages
	43
	44	class IOCopyMapper : public IOMapper
	45	{
	46	OSDeclareDefaultStructors(IOCopyMapper);
	47
	48	// alias the fTable variable into our mappings table
	49	#define fMappings ((ActiveDARTEntry *) super::fTable)
	50
	51	private:
	52
	53	UInt32 fFreeLists[kMaxNumZones];
	54
	55	IOLock *fTableLock;
	56
	57	void *fDummyPage;
	58
	59	UInt32 fNumZones;
	60	UInt32 fMapperRegionSize;
	61	UInt32 fMapperRegionUsed;
	62	UInt32 fMapperRegionMaxUsed;
	63	UInt32 fFreeSleepers;
	64	ppnum_t fDummyPageNumber;
	65	ppnum_t fBufferPage;
	66
	67	// Internal functions
	68
	69	void breakUp(unsigned start, unsigned end, unsigned freeInd);
	70	void invalidateDART(ppnum_t pnum, IOItemCount size);
	71	void tlbInvalidate(ppnum_t pnum, IOItemCount size);
	72
	73	virtual void free();
	74
	75	virtual bool initHardware(IOService * provider);
	76	public:
	77	virtual ppnum_t iovmAlloc(IOItemCount pages);
	78	virtual void iovmFree(ppnum_t addr, IOItemCount pages);
	79
	80	virtual void iovmInsert(ppnum_t addr, IOItemCount offset, ppnum_t page);
	81	virtual void iovmInsert(ppnum_t addr, IOItemCount offset,
	82	ppnum_t *pageList, IOItemCount pageCount);
	83	virtual void iovmInsert(ppnum_t addr, IOItemCount offset,
	84	upl_page_info_t *pageList, IOItemCount pageCount);
	85
	86	virtual addr64_t mapAddr(IOPhysicalAddress addr);
	87	};
	88
	89	extern IOCopyMapper * gIOCopyMapper;