xnu-7195.50.7.100.1.tar.gz

[apple/xnu.git] / osfmk / device / device_port.h

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/*
 * @OSF_COPYRIGHT@
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/*
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
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 * 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
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 * 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.
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 * Carnegie Mellon requests users of this software to return to
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 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
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 */
/*
 */
/*
 *	Author: David B. Golub, Carnegie Mellon University
 *	Date:   8/89
 */

#ifndef _DEVICE_DEVICE_PORT_H_
#define _DEVICE_DEVICE_PORT_H_

#include <device/device_types.h>

/*
 *	Master privileged I/O object for this host
 */
extern mach_port_t      master_device_port;

#define DEVICE_PAGER_GUARDED            0x1
#define DEVICE_PAGER_COHERENT           0x2
#define DEVICE_PAGER_CACHE_INHIB        0x4
#define DEVICE_PAGER_WRITE_THROUGH      0x8
#define DEVICE_PAGER_CONTIGUOUS         0x100
#define DEVICE_PAGER_NOPHYSCACHE        0x200

#ifdef XNU_KERNEL_PRIVATE
#include <vm/memory_types.h>

_Static_assert(((DEVICE_PAGER_CONTIGUOUS | DEVICE_PAGER_NOPHYSCACHE) & VM_WIMG_MASK) == 0,
    "device pager flags overlap WIMG mask");

/* Assert on the backwards-compatible DEVICE_PAGER* values */
_Static_assert(DEVICE_PAGER_GUARDED == VM_MEM_GUARDED, "DEVICE_PAGER_GUARDED != VM_MEM_GUARDED");
_Static_assert(DEVICE_PAGER_COHERENT == VM_MEM_COHERENT, "DEVICE_PAGER_COHERENT != VM_MEM_COHERENT");
_Static_assert(DEVICE_PAGER_CACHE_INHIB == VM_MEM_NOT_CACHEABLE, "DEVICE_PAGER_CACHE_INHIB != VM_MEM_NOT_CACHEABLE");
_Static_assert(DEVICE_PAGER_WRITE_THROUGH == VM_MEM_WRITE_THROUGH, "DEVICE_PAGER_WRITE_THROUGH != VM_MEM_WRITE_THROUGH");

#endif /* KERNEL_PRIVATE */

#endif  /* _DEVICE_DEVICE_PORT_H_ */