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	1	/*
	2	* Copyright (c) 2009 Apple 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
	29	#ifndef _VM_VM_MAP_STORE_H
	30	#define _VM_VM_MAP_STORE_H
	31
	32	/*
	33	#ifndef VM_MAP_STORE_USE_LL
	34	#define VM_MAP_STORE_USE_LL
	35	#endif
	36	*/
	37	#ifndef VM_MAP_STORE_USE_RB
	38	#define VM_MAP_STORE_USE_RB
	39	#endif
	40
	41	#include <libkern/tree.h>
	42
	43	struct _vm_map;
	44	struct vm_map_entry;
	45	struct vm_map_copy;
	46	struct vm_map_header;
	47
	48	struct vm_map_store {
	49	#ifdef VM_MAP_STORE_USE_RB
	50	RB_ENTRY(vm_map_store) entry;
	51	#endif
	52	};
	53
	54	#ifdef VM_MAP_STORE_USE_RB
	55	RB_HEAD( rb_head, vm_map_store );
	56	#endif
	57
	58	#include <vm/vm_map.h>
	59	#include <vm/vm_map_store_ll.h>
	60	#include <vm/vm_map_store_rb.h>
	61
	62	#define UPDATE_HIGHEST_ENTRY_END(map, highest_entry) \
	63	MACRO_BEGIN \
	64	struct _vm_map* UHEE_map; \
	65	struct vm_map_entry* UHEE_entry; \
	66	UHEE_map = (map); \
	67	assert(UHEE_map->disable_vmentry_reuse); \
	68	assert(!UHEE_map->is_nested_map); \
	69	UHEE_entry = (highest_entry); \
	70	if( UHEE_map->highest_entry_end < UHEE_entry->vme_end) { \
	71	UHEE_map->highest_entry_end = UHEE_entry->vme_end; \
	72	} \
	73	MACRO_END
	74
	75	#define VM_MAP_HIGHEST_ENTRY(map, entry, start) \
	76	MACRO_BEGIN \
	77	struct _vm_map* VMHE_map; \
	78	struct vm_map_entry* tmp_entry; \
	79	vm_map_offset_t VMHE_start; \
	80	VMHE_map = (map); \
	81	assert(VMHE_map->disable_vmentry_reuse); \
	82	assert(!VMHE_map->is_nested_map); \
	83	VMHE_start= VMHE_map->highest_entry_end + PAGE_SIZE_64; \
	84	while(vm_map_lookup_entry(VMHE_map, VMHE_start, &tmp_entry)){ \
	85	VMHE_map->highest_entry_end = tmp_entry->vme_end; \
	86	VMHE_start = VMHE_map->highest_entry_end + PAGE_SIZE_64; \
	87	} \
	88	entry = tmp_entry; \
	89	start = VMHE_start; \
	90	MACRO_END
	91
	92	/*
	93	* SAVE_HINT_MAP_READ:
	94	*
	95	* Saves the specified entry as the hint for
	96	* future lookups. only a read lock is held on map,
	97	* so make sure the store is atomic... OSCompareAndSwap
	98	* guarantees this... also, we don't care if we collide
	99	* and someone else wins and stores their 'hint'
	100	*/
	101	#define SAVE_HINT_MAP_READ(map, value) \
	102	MACRO_BEGIN \
	103	OSCompareAndSwapPtr((map)->hint, value, &(map)->hint); \
	104	MACRO_END
	105
	106
	107	/*
	108	* SAVE_HINT_MAP_WRITE:
	109	*
	110	* Saves the specified entry as the hint for
	111	* future lookups. write lock held on map,
	112	* so no one else can be writing or looking
	113	* until the lock is dropped, so it's safe
	114	* to just do an assignment
	115	*/
	116	#define SAVE_HINT_MAP_WRITE(map, value) \
	117	MACRO_BEGIN \
	118	(map)->hint = (value); \
	119	MACRO_END
	120
	121	#define SAVE_HINT_HOLE_WRITE(map, value) \
	122	MACRO_BEGIN \
	123	(map)->hole_hint = (value); \
	124	MACRO_END
	125
	126	#define SKIP_RB_TREE 0xBAADC0D1
	127
	128	#define VM_MAP_ENTRY_CREATE 1
	129	#define VM_MAP_ENTRY_DELETE 2
	130
	131	void vm_map_store_init( struct vm_map_header* );
	132	boolean_t vm_map_store_lookup_entry( struct _vm_map, vm_map_offset_t, struct vm_map_entry*);
	133	void vm_map_store_update( struct _vm_map, struct vm_map_entry, int);
	134	void _vm_map_store_entry_link( struct vm_map_header , struct vm_map_entry, struct vm_map_entry*);
	135	void vm_map_store_entry_link( struct _vm_map, struct vm_map_entry, struct vm_map_entry*, vm_map_kernel_flags_t);
	136	void _vm_map_store_entry_unlink( struct vm_map_header , struct vm_map_entry);
	137	void vm_map_store_entry_unlink( struct _vm_map, struct vm_map_entry);
	138	void vm_map_store_update_first_free( struct _vm_map, struct vm_map_entry, boolean_t new_entry_creation);
	139	void vm_map_store_copy_reset( struct vm_map_copy, struct vm_map_entry);
	140	#if MACH_ASSERT
	141	boolean_t first_free_is_valid_store( struct _vm_map*);
	142	#endif
	143	boolean_t vm_map_store_has_RB_support( struct vm_map_header *hdr );
	144
	145	#endif /* _VM_VM_MAP_STORE_H */