/*
 * Copyright (c) 2000-2016 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@
 */
/*
 * @OSF_COPYRIGHT@
 */
/*
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 */
/*
 *	File:	memory_object.h
 *	Author:	Michael Wayne Young
 *
 *	External memory management interface definition.
 */

#ifndef _MACH_MEMORY_OBJECT_TYPES_H_
#define _MACH_MEMORY_OBJECT_TYPES_H_

/*
 *	User-visible types used in the external memory
 *	management interface:
 */

#include <mach/port.h>
#include <mach/message.h>
#include <mach/vm_prot.h>
#include <mach/vm_sync.h>
#include <mach/vm_types.h>
#include <mach/machine/vm_types.h>

#include <sys/cdefs.h>


#define VM_64_BIT_DATA_OBJECTS

typedef unsigned long long      memory_object_offset_t;
typedef unsigned long long      memory_object_size_t;
typedef natural_t               memory_object_cluster_size_t;
typedef natural_t *             memory_object_fault_info_t;

typedef unsigned long long      vm_object_id_t;


/*
 * Temporary until real EMMI version gets re-implemented
 */


typedef mach_port_t     memory_object_t;
/*
 * vestigial, maintained for source compatibility,
 * no MIG interface will accept or return non NULL
 * objects for those.
 */
typedef mach_port_t     memory_object_control_t;


typedef memory_object_t *memory_object_array_t;
/* A memory object ... */
/*  Used by the kernel to retrieve */
/*  or store data */

typedef mach_port_t     memory_object_name_t;
/* Used to describe the memory ... */
/*  object in vm_regions() calls */

typedef mach_port_t     memory_object_default_t;
/* Registered with the host ... */
/*  for creating new internal objects */

#define MEMORY_OBJECT_NULL              ((memory_object_t) 0)
#define MEMORY_OBJECT_CONTROL_NULL      ((memory_object_control_t) 0)
#define MEMORY_OBJECT_NAME_NULL         ((memory_object_name_t) 0)
#define MEMORY_OBJECT_DEFAULT_NULL      ((memory_object_default_t) 0)


typedef int             memory_object_copy_strategy_t;
/* How memory manager handles copy: */
#define         MEMORY_OBJECT_COPY_NONE         0
/* ... No special support */
#define         MEMORY_OBJECT_COPY_CALL         1
/* ... Make call on memory manager */
#define         MEMORY_OBJECT_COPY_DELAY        2
/* ... Memory manager doesn't
 *     change data externally.
 */
#define         MEMORY_OBJECT_COPY_TEMPORARY    3
/* ... Memory manager doesn't
 *     change data externally, and
 *     doesn't need to see changes.
 */
#define         MEMORY_OBJECT_COPY_SYMMETRIC    4
/* ... Memory manager doesn't
 *     change data externally,
 *     doesn't need to see changes,
 *     and object will not be
 *     multiply mapped.
 *
 *     XXX
 *     Not yet safe for non-kernel use.
 */

#define         MEMORY_OBJECT_COPY_INVALID      5
/* ...	An invalid copy strategy,
 *	for external objects which
 *	have not been initialized.
 *	Allows copy_strategy to be
 *	examined without also
 *	examining pager_ready and
 *	internal.
 */

#define         MEMORY_OBJECT_COPY_DELAY_FORK   6
/*
 * ...  Like MEMORY_OBJECT_COPY_DELAY for vm_map_fork() but like
 *      MEMORY_OBJECT_COPY_NONE otherwise.
 */

typedef int             memory_object_return_t;
/* Which pages to return to manager
 *  this time (lock_request) */
#define         MEMORY_OBJECT_RETURN_NONE       0
/* ... don't return any. */
#define         MEMORY_OBJECT_RETURN_DIRTY      1
/* ... only dirty pages. */
#define         MEMORY_OBJECT_RETURN_ALL        2
/* ... dirty and precious pages. */
#define         MEMORY_OBJECT_RETURN_ANYTHING   3
/* ... any resident page. */

/*
 *	Data lock request flags
 */

#define         MEMORY_OBJECT_DATA_FLUSH        0x1
#define         MEMORY_OBJECT_DATA_NO_CHANGE    0x2
#define         MEMORY_OBJECT_DATA_PURGE        0x4 /* This is unused and unimplemented */
#define         MEMORY_OBJECT_COPY_SYNC         0x8
#define         MEMORY_OBJECT_DATA_SYNC         0x10
#define         MEMORY_OBJECT_IO_SYNC           0x20
#define         MEMORY_OBJECT_DATA_FLUSH_ALL    0x40

/*
 *	Types for the memory object flavor interfaces
 */

#define MEMORY_OBJECT_INFO_MAX      (1024)
typedef int     *memory_object_info_t;
typedef int      memory_object_flavor_t;
typedef int      memory_object_info_data_t[MEMORY_OBJECT_INFO_MAX];


#define MEMORY_OBJECT_PERFORMANCE_INFO  11
#define MEMORY_OBJECT_ATTRIBUTE_INFO    14
#define MEMORY_OBJECT_BEHAVIOR_INFO     15


struct memory_object_perf_info {
	memory_object_cluster_size_t    cluster_size;
	boolean_t                       may_cache;
};

struct memory_object_attr_info {
	memory_object_copy_strategy_t   copy_strategy;
	memory_object_cluster_size_t    cluster_size;
	boolean_t                       may_cache_object;
	boolean_t                       temporary;
};

struct memory_object_behave_info {
	memory_object_copy_strategy_t   copy_strategy;
	boolean_t                       temporary;
	boolean_t                       invalidate;
	boolean_t                       silent_overwrite;
	boolean_t                       advisory_pageout;
};


typedef struct memory_object_behave_info *memory_object_behave_info_t;
typedef struct memory_object_behave_info memory_object_behave_info_data_t;

typedef struct memory_object_perf_info  *memory_object_perf_info_t;
typedef struct memory_object_perf_info  memory_object_perf_info_data_t;

typedef struct memory_object_attr_info  *memory_object_attr_info_t;
typedef struct memory_object_attr_info  memory_object_attr_info_data_t;

#define MEMORY_OBJECT_BEHAVE_INFO_COUNT ((mach_msg_type_number_t)       \
	        (sizeof(memory_object_behave_info_data_t)/sizeof(int)))
#define MEMORY_OBJECT_PERF_INFO_COUNT   ((mach_msg_type_number_t)       \
	        (sizeof(memory_object_perf_info_data_t)/sizeof(int)))
#define MEMORY_OBJECT_ATTR_INFO_COUNT   ((mach_msg_type_number_t)       \
	        (sizeof(memory_object_attr_info_data_t)/sizeof(int)))

#define invalid_memory_object_flavor(f)                                 \
	(f != MEMORY_OBJECT_ATTRIBUTE_INFO &&                           \
	 f != MEMORY_OBJECT_PERFORMANCE_INFO &&                         \
	 f != OLD_MEMORY_OBJECT_BEHAVIOR_INFO &&                        \
	 f != MEMORY_OBJECT_BEHAVIOR_INFO &&                            \
	 f != OLD_MEMORY_OBJECT_ATTRIBUTE_INFO)


/*
 * Used to support options on memory_object_release_name call
 */
#define MEMORY_OBJECT_TERMINATE_IDLE    0x1
#define MEMORY_OBJECT_RESPECT_CACHE     0x2
#define MEMORY_OBJECT_RELEASE_NO_OP     0x4


/* named entry processor mapping options */
/* enumerated */
#define MAP_MEM_NOOP                      0
#define MAP_MEM_COPYBACK                  1
#define MAP_MEM_IO                        2
#define MAP_MEM_WTHRU                     3
#define MAP_MEM_WCOMB                     4       /* Write combining mode */
                                                  /* aka store gather     */
#define MAP_MEM_INNERWBACK                5
#define MAP_MEM_POSTED                    6
#define MAP_MEM_RT                        7
#define MAP_MEM_POSTED_REORDERED          8
#define MAP_MEM_POSTED_COMBINED_REORDERED 9

#define GET_MAP_MEM(flags)      \
	((((unsigned int)(flags)) >> 24) & 0xFF)

#define SET_MAP_MEM(caching, flags)     \
	((flags) = ((((unsigned int)(caching)) << 24) \
	                & 0xFF000000) | ((flags) & 0xFFFFFF));

/* leave room for vm_prot bits (0xFF ?) */
#define MAP_MEM_PROT_MASK            0xFF
#define MAP_MEM_LEDGER_TAGGED        0x002000 /* object owned by a specific task and ledger */
#define MAP_MEM_PURGABLE_KERNEL_ONLY 0x004000 /* volatility controlled by kernel */
#define MAP_MEM_GRAB_SECLUDED   0x008000 /* can grab secluded pages */
#define MAP_MEM_ONLY            0x010000 /* change processor caching  */
#define MAP_MEM_NAMED_CREATE    0x020000 /* create extant object      */
#define MAP_MEM_PURGABLE        0x040000 /* create a purgable VM object */
#define MAP_MEM_NAMED_REUSE     0x080000 /* reuse provided entry if identical */
#define MAP_MEM_USE_DATA_ADDR   0x100000 /* preserve address of data, rather than base of page */
#define MAP_MEM_VM_COPY         0x200000 /* make a copy of a VM range */
#define MAP_MEM_VM_SHARE        0x400000 /* extract a VM range for remap */
#define MAP_MEM_4K_DATA_ADDR    0x800000 /* preserve 4K aligned address of data */

#define MAP_MEM_FLAGS_MASK 0x00FFFF00
#define MAP_MEM_FLAGS_USER (                               \
	MAP_MEM_PURGABLE_KERNEL_ONLY |                     \
	MAP_MEM_GRAB_SECLUDED |                            \
	MAP_MEM_ONLY |                                     \
	MAP_MEM_NAMED_CREATE |                             \
	MAP_MEM_PURGABLE |                                 \
	MAP_MEM_NAMED_REUSE |                              \
	MAP_MEM_USE_DATA_ADDR |                            \
	MAP_MEM_VM_COPY |                                  \
	MAP_MEM_VM_SHARE |                                 \
	MAP_MEM_LEDGER_TAGGED |                            \
	MAP_MEM_4K_DATA_ADDR)
#define MAP_MEM_FLAGS_ALL (                     \
	MAP_MEM_FLAGS_USER)


/*
 *  Universal Page List data structures
 *
 *  A UPL describes a bounded set of physical pages
 *  associated with some range of an object or map
 *  and a snapshot of the attributes associated with
 *  each of those pages.
 */

struct upl_page_info {
	unsigned int    opaque[2];      /* use upl_page_xxx() accessor funcs */
};


typedef struct upl_page_info    upl_page_info_t;
typedef upl_page_info_t         *upl_page_info_array_t;
typedef upl_page_info_array_t   upl_page_list_ptr_t;

typedef uint32_t        upl_offset_t;   /* page-aligned byte offset */
typedef uint32_t        upl_size_t;     /* page-aligned byte size */
#define UPL_SIZE_MAX    (UINT32_MAX & ~PAGE_MASK)

/* upl invocation flags */
/* top nibble is used by super upl */

typedef uint64_t upl_control_flags_t;

#define UPL_FLAGS_NONE          0x00000000ULL
/*
 * This call will only copy out (read from) from pages in this UPL.
 * It is used for things such as pageout.
 */
#define UPL_COPYOUT_FROM        0x00000001ULL
/*
 * Mark the page as precious. See vmp_precious for more docs.
 */
#define UPL_PRECIOUS            0x00000002ULL
/*
 * Does not seem to be respected anymore.
 */
#define UPL_NO_SYNC             0x00000004ULL
/*
 * For a COPYOUT_FROM upl, do not try to free the page when the UPL is commited.
 *
 * For a !COPYOUT_FROM upl, this means we should clear the dirty bits on pages
 * when the upl is commited. This is used for things such as pagein or file read,
 * which despite literally writing to the physical pages, does not change them
 * from the previous contents.
 */
#define UPL_CLEAN_IN_PLACE      0x00000008ULL
/*
 * Do not block for pages when creating the UPL.
 */
#define UPL_NOBLOCK             0x00000010ULL
/*
 * Only return dirty pages in the UPL.
 * Only implemented for COPYOUT_FROM upls.
 */
#define UPL_RET_ONLY_DIRTY      0x00000020ULL
/*
 * Allocate a ->page_list inline with the upl. This allows clients to call
 * upl_get_internal_page_list. If this flag is not passed, an external page list
 * can be used if it is passed in.
 */
#define UPL_SET_INTERNAL        0x00000040ULL
/*
 * Only valid for vm_map_create_upl. This determines what sort of object would
 * be in the UPL if it were created (e.g. UPL_DEV_MEMORY/UPL_PHYS_CONTIG).
 *
 * IMPORTANT:
 * Note that using this API is inherently racy, as that object type may change
 * if a UPL is later created on the same virtual address.
 */
#define UPL_QUERY_OBJECT_TYPE   0x00000080ULL
/*
 * Only meaningful if !UPL_COPYOUT_FROM.
 *
 * This means the UPL will not return any pages that were already resident in
 * the buffer cache.
 * One example where this might be useful is pagein.
 */
#define UPL_RET_ONLY_ABSENT     0x00000100ULL
/*
 * This influences statistics as well as means existing mappings to pages in the
 * UPL are not revoked.
 * This is only currently respected by vm_object_upl_request, not
 * vm_object_iopl_request.
 *
 * It's not entirely clear exactly in what circumstances this is correct to be
 * passed, although the intent seems to be it is not passed for pagein/out and
 * only file i/o going through vm_object_upl_request.
 */
#define UPL_FILE_IO             0x00000200ULL
/*
 * Do not create a pageout object full of private pages unless this UPL gets
 * mapped later.
 * If this flag is passed, the pages in the UPL may be busy, which may block
 * faults on them directly.
 *
 * Passing this flag will reduce the memory overhead for a UPL as it avoids extra
 * allocations.
 */
#define UPL_SET_LITE            0x00000400ULL
/*
 * When waiting for or faulting pages, do so with ABORTSAFE waits.
 *
 * Currently only respected by vm_object_iopl_request, not vm_object_upl_request.
 */
#define UPL_SET_INTERRUPTIBLE   0x00000800ULL
/*
 * This flag is not respected by the VM or UBC layers.
 */
#define UPL_SET_IO_WIRE         0x00001000ULL
/*
 * This upl is being used for pageout, not just an msync. This affects
 * clustering behavior as well as statistics.
 *
 * Only valid for a COPYOUT_FROM upl going through vm_object_upl_request.
 */
#define UPL_FOR_PAGEOUT         0x00002000ULL
/*
 * The effect is it causes the pages to be dumped (e.g. VM_PAGE_FREE()) when the
 * upl is commited.
 *
 * Only respected at the ubc layer, not a real flag to VM upl functions.
 */
#define UPL_WILL_BE_DUMPED      0x00004000ULL
/*
 * Only respected by vm_map_create_upl.
 */
#define UPL_FORCE_DATA_SYNC     0x00008000ULL
/* continued after the ticket bits... */

#define UPL_PAGE_TICKET_MASK    0x000F0000ULL
#define UPL_PAGE_TICKET_SHIFT   16

/* ... flags resume here */
/*
 * Don't allow the pages in the UPL to be faulted by any other threads while this
 * UPL exists. Keep them busy.
 *
 * Only respected by vm_object_iopl_request.
 */
#define UPL_BLOCK_ACCESS        0x00100000ULL
/*
 * This flag is not respected by the VM or UBC layers.
 */
#define UPL_ENCRYPT             0x00200000ULL
/*
 * Do not zero fill new pages created as part of this upl.
 * IMPORTANT:
 * The caller is responsible for filling the entire content of the page
 * before calling upl_commit. Not doing so may cause security issues.
 *
 * Only respected by vm_object_iopl_request.
 */
#define UPL_NOZEROFILL          0x00400000ULL
/*
 * The caller will modify the contents of the page.
 * This is different from e.g. a pagein, where the kernel may literally write
 * into the pages in the upl, but it is not actually modifying the contents,
 * just loading the contents into a page.
 */
#define UPL_WILL_MODIFY         0x00800000ULL
/*
 * This flag is not supported by the VM or UBC layers.
 */
#define UPL_NEED_32BIT_ADDR     0x01000000ULL
/*
 * Only respected by the UBC layer, not a VM upl flag.
 * This means an msync is being done.
 */
#define UPL_UBC_MSYNC           0x02000000ULL
/*
 * Only respected by the UBC layer, not a VM upl flag.
 * This means a pageout is being done.
 */
#define UPL_UBC_PAGEOUT         0x04000000ULL
/*
 * Intended for the UBC layer, not as a VM upl flag. The VM layer now does
 * look at it for telemetry purposes.
 * This flag means a pagein is being done.
 */
#define UPL_UBC_PAGEIN          0x08000000ULL
/*
 * At commit time, mark the pages dirty.
 * Only respected by vm_object_upl_request.
 */
#define UPL_REQUEST_SET_DIRTY   0x10000000ULL
/*
 * Fail if pages not all resident.
 * Only respected by vm_object_iopl_request.
 */
#define UPL_REQUEST_NO_FAULT    0x20000000ULL
/*
 * Same as UPL_NOZEROFILL, but also use different dtrace probes
 */
#define UPL_NOZEROFILLIO        0x40000000ULL
/*
 * Force the data cache to be synced if the VM believes it needs to be.
 */
#define UPL_REQUEST_FORCE_COHERENCY     0x80000000ULL
#if CONFIG_EXCLAVES
#define UPL_SHARE_SK                    0x100000000ULL
#endif 


#define UPL_CARRY_VA_TAG        0x10000000000ULL
/* UPL flags known by this kernel */
#define UPL_VALID_FLAGS         0x1FFFFFFFFFFULL


/* upl abort error flags */


/*
 * For any pages created as part of this pagein, set the vmp_contents_state to
 * VM_PAGE_CONTENTS_PAGEIN_NEEDS_RETRY.
 */
 #define UPL_ABORT_RESTART               0x1
/*
 * For any pages created as part of this pagein, free the pages.
 */
#define UPL_ABORT_UNAVAILABLE   0x2
/*
 * For any pages created as part of this pagein, set the vmp_contents_state to
 * VM_PAGE_CONTENTS_IN_ERROR.
 */
#define UPL_ABORT_ERROR         0x4
/*
 * UPL_ABORT_FREE_ON_EMPTY - not passed to the VM upl subsystem.
 * For upls going through ubc_upl_abort, it means deallocate the upl if it is empty.
 */
#define UPL_ABORT_FREE_ON_EMPTY 0x8  /* only implemented in wrappers */
/* Free the pages associated with this UPL. */
#define UPL_ABORT_DUMP_PAGES    0x10
/* This flag is not respected by the VM or UBC layers, although that may be a bug. */
#define UPL_ABORT_NOTIFY_EMPTY  0x20
/* deprecated: #define UPL_ABORT_ALLOW_ACCESS	0x40 */
/* Despite the abort, put the pages on the inactive queue */
#define UPL_ABORT_REFERENCE     0x80

/* This flag is not respected by the VM or UBC layers. */
#define UPL_CHECK_DIRTY         0x1


/*
 * The following are flags for pagein/pageout, but are not directly passed to
 * upl_request or iopl request.
 *
 *  upl pagein/pageout  flags
 *
 *
 * when I/O is issued from this UPL it should be done synchronously
 */
#define UPL_IOSYNC      0x1

/*
 * the passed in UPL should not have either a commit or abort
 * applied to it by the underlying layers... the site that
 * created the UPL is responsible for cleaning it up.
 */
#define UPL_NOCOMMIT    0x2

/*
 * turn off any speculative read-ahead applied at the I/O layer
 */
#define UPL_NORDAHEAD   0x4

/*
 * pageout request is targeting a real file
 * as opposed to a swap file.
 */

#define UPL_VNODE_PAGER 0x8
/*
 * this pageout is being originated as part of an explicit
 * memory synchronization operation... no speculative clustering
 * should be applied, only the range specified should be pushed.
 */
#define UPL_MSYNC               0x10

/*
 *
 */
#define UPL_PAGING_ENCRYPTED    0x20

/*
 * this pageout is being originated as part of an explicit
 * memory synchronization operation that is checking for I/O
 * errors and taking it's own action... if an error occurs,
 * just abort the pages back into the cache unchanged
 */
#define UPL_KEEPCACHED          0x40

/*
 * this pageout originated from within cluster_io to deal
 * with a dirty page that hasn't yet been seen by the FS
 * that backs it... tag it so that the FS can take the
 * appropriate action w/r to its locking model since the
 * pageout will reenter the FS for the same file currently
 * being handled in this context.
 */
#define UPL_NESTED_PAGEOUT      0x80

/*
 * we've detected a sequential access pattern and
 * we are speculatively and aggressively pulling
 * pages in... do not count these as real PAGEINs
 * w/r to our hard throttle maintenance
 */
#define UPL_IOSTREAMING         0x100

/*
 * Currently, it's only used for the swap pagein path.
 * Since the swap + compressed pager layer manage their
 * pages, these pages are not marked "absent" i.e. these
 * are "valid" pages. The pagein path will _not_ issue an
 * I/O (correctly) for valid pages. So, this flag is used
 * to override that logic in the vnode I/O path.
 */
#define UPL_IGNORE_VALID_PAGE_CHECK     0x200



/* upl commit flags */
/*
 * UPL_COMMIT_FREE_ON_EMPTY - not passed to the VM upl subsystem.
 * For upls going through ubc_upl_commit, it means deallocate the upl if it is empty.
 */
#define UPL_COMMIT_FREE_ON_EMPTY        0x001
/*
 * Clear the VM and pmap dirty bits about pages in the upl.
 */
#define UPL_COMMIT_CLEAR_DIRTY          0x002
/*
 * Set the VM dirty bit (don't change the pmap dirtiness).
 */
#define UPL_COMMIT_SET_DIRTY            0x004
/*
 * Put unclustered pages on the inactive queue.
 */
#define UPL_COMMIT_INACTIVATE           0x008
/*
 * Set the empty out parameter in upl_commit if the upl has no pages left.
 */
#define UPL_COMMIT_NOTIFY_EMPTY         0x010
/*
 * The upl did its own code signing validation. Copy the various codesigning bits
 * from on each page from the code signing bits in the upl.
 */
#define UPL_COMMIT_CS_VALIDATED         0x040
/*
 * Clear the vmp_precious field on each page.
 */
#define UPL_COMMIT_CLEAR_PRECIOUS       0x080
/*
 * Send unclustered pages to the speculative queue. Used for speculative (e.g. readahead)
 * pageins.
 */
#define UPL_COMMIT_SPECULATE            0x100
/*
 * Free any absent pages found in the upl.
 */
#define UPL_COMMIT_FREE_ABSENT          0x200
/*
 * The contents of this page were directly written to by the kernel when
 * filling in the contents. Set the vmp_written_by_kernel bit. See that for
 * more documentation.
 */
#define UPL_COMMIT_WRITTEN_BY_KERNEL    0x400

#define UPL_COMMIT_KERNEL_ONLY_FLAGS    (UPL_COMMIT_CS_VALIDATED | UPL_COMMIT_FREE_ABSENT)

/* flags for return of state from vm_map_get_upl,  vm_upl address space */
/* based call */
#define UPL_DEV_MEMORY                  0x1
#define UPL_PHYS_CONTIG                 0x2


/*
 * Flags for the UPL page ops routine.  This routine is not exported
 * out of the kernel at the moment and so the defs live here.
 */
#define UPL_POP_DIRTY           0x1
#define UPL_POP_PAGEOUT         0x2
#define UPL_POP_PRECIOUS                0x4
#define UPL_POP_ABSENT          0x8
#define UPL_POP_BUSY                    0x10

#define UPL_POP_PHYSICAL        0x10000000
#define UPL_POP_DUMP            0x20000000
#define UPL_POP_SET             0x40000000
#define UPL_POP_CLR             0x80000000

/*
 * Flags for the UPL range op routine.  This routine is not exported
 * out of the kernel at the moemet and so the defs live here.
 */
/*
 * UPL_ROP_ABSENT: Returns the extent of the range presented which
 * is absent, starting with the start address presented
 */
#define UPL_ROP_ABSENT          0x01
/*
 * UPL_ROP_PRESENT: Returns the extent of the range presented which
 * is present (i.e. resident), starting with the start address presented
 */
#define UPL_ROP_PRESENT         0x02
/*
 * UPL_ROP_DUMP: Dump the pages which are found in the target object
 * for the target range.
 */
#define UPL_ROP_DUMP                    0x04


__BEGIN_DECLS

extern boolean_t        upl_page_present(upl_page_info_t *upl, int index);
extern boolean_t        upl_dirty_page(upl_page_info_t *upl, int index);
extern boolean_t        upl_valid_page(upl_page_info_t *upl, int index);
extern void             upl_deallocate(upl_t upl);
extern void             upl_mark_decmp(upl_t upl);
extern void             upl_unmark_decmp(upl_t upl);
extern boolean_t        upl_has_wired_pages(upl_t upl);


__END_DECLS


#endif  /* _MACH_MEMORY_OBJECT_TYPES_H_ */
