osfmk/i386/mtrr.h

   1 /*
   2  * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30
  31 #ifndef _I386_MTRR_H_
  32 #define _I386_MTRR_H_
  33
  34 /*
  35  * Memory type range register (MTRR) support.
  36  */
  37
  38 #include <mach/std_types.h>
  39 #include <sys/appleapiopts.h>
  40 #include <sys/cdefs.h>
  41
  42 #ifdef __APPLE_API_PRIVATE
  43
  44 enum {
  45         MTRR_TYPE_UNCACHEABLE  = 0,
  46         MTRR_TYPE_WRITECOMBINE = 1,
  47         MTRR_TYPE_WRITETHROUGH = 4,
  48         MTRR_TYPE_WRITEPROTECT = 5,
  49         MTRR_TYPE_WRITEBACK    = 6
  50 };
  51
  52 __BEGIN_DECLS
  53
  54 extern void          mtrr_init(void);
  55 extern kern_return_t mtrr_update_cpu(void);
  56 extern kern_return_t mtrr_update_all_cpus(void);
  57
  58 extern kern_return_t mtrr_range_add(    addr64_t phys_addr,
  59                                         uint64_t length,
  60                                         uint32_t mem_type);
  61
  62 extern kern_return_t mtrr_range_remove( addr64_t phys_addr,
  63                                         uint64_t length,
  64                                         uint32_t mem_type);
  65
  66 extern void          pat_init(void);
  67
  68 __END_DECLS
  69
  70 #endif /* __APPLE_API_PRIVATE */
  71
  72 #endif /* !_I386_MTRR_H_ */