| | 1 | /* |
| | 2 | * Copyright (c) 2000 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 | * @OSF_FREE_COPYRIGHT@ |
| | 32 | */ |
| | 33 | /* |
| | 34 | * HISTORY |
| | 35 | * |
| | 36 | * Revision 1.1.1.1 1998/09/22 21:05:38 wsanchez |
| | 37 | * Import of Mac OS X kernel (~semeria) |
| | 38 | * |
| | 39 | * Revision 1.1.1.1 1998/03/07 02:25:39 wsanchez |
| | 40 | * Import of OSF Mach kernel (~mburg) |
| | 41 | * |
| | 42 | * Revision 1.3.11.4 1995/12/15 10:49:49 bernadat |
| | 43 | * cbus includes moved to busses/cbus |
| | 44 | * [95/12/15 bernadat] |
| | 45 | * |
| | 46 | * Revision 1.3.11.3 1995/08/21 20:33:23 devrcs |
| | 47 | * ri-osc CR1547: Fix himem buffer translation to cope with non |
| | 48 | * page-aligned addresses. |
| | 49 | * [1995/08/08 16:52:06 bolinger] |
| | 50 | * |
| | 51 | * Revision 1.3.11.2 1995/01/26 22:14:56 ezf |
| | 52 | * removed extraneous CMU CR |
| | 53 | * [1995/01/26 20:24:48 ezf] |
| | 54 | * |
| | 55 | * Revision 1.3.9.2 1994/06/08 21:14:27 dswartz |
| | 56 | * Preemption merge. |
| | 57 | * [1994/06/08 21:12:31 dswartz] |
| | 58 | * |
| | 59 | * Revision 1.3.9.1 1994/05/19 20:30:30 dwm |
| | 60 | * mk6 CR 80. Add himem_init prototype. |
| | 61 | * [1994/05/19 20:30:10 dwm] |
| | 62 | * |
| | 63 | * Revision 1.3.2.3 1993/08/09 19:37:21 dswartz |
| | 64 | * Add ANSI prototypes - CR#9523 |
| | 65 | * [1993/08/06 17:50:06 dswartz] |
| | 66 | * |
| | 67 | * Revision 1.3.2.2 1993/06/09 02:25:24 gm |
| | 68 | * CR9176 - ANSI C violations: trailing tokens on CPP |
| | 69 | * directives, extra semicolons after decl_ ..., asm keywords |
| | 70 | * [1993/06/07 18:58:40 jeffc] |
| | 71 | * |
| | 72 | * Added to OSF/1 R1.3 from NMK15.0. |
| | 73 | * [1993/06/02 21:01:57 jeffc] |
| | 74 | * |
| | 75 | * Revision 1.3 1993/04/19 16:09:54 devrcs |
| | 76 | * Use free copyright |
| | 77 | * [1993/03/03 12:12:12 bernadat] |
| | 78 | * |
| | 79 | * Revision 1.2 1992/11/25 01:07:16 robert |
| | 80 | * integrate changes below for norma_14 |
| | 81 | * [1992/11/13 19:28:57 robert] |
| | 82 | * |
| | 83 | * $EndLog$ |
| | 84 | */ |
| | 85 | |
| | 86 | #ifndef _I386AT_HIMEM_H_ |
| | 87 | #define _I386AT_HIMEM_H_ |
| | 88 | |
| | 89 | /* |
| | 90 | * support of memory above 16 Megs for DMA limited to memory |
| | 91 | * below 16 Megs. |
| | 92 | */ |
| | 93 | |
| | 94 | #include <platforms.h> |
| | 95 | |
| | 96 | #define HIMEM_STATS 0 |
| | 97 | |
| | 98 | #if HIMEM_STATS |
| | 99 | extern int himem_request; |
| | 100 | extern int himem_used; |
| | 101 | #endif /* HIMEM_STATS */ |
| | 102 | |
| | 103 | struct himem_link { |
| | 104 | struct himem_link *next; |
| | 105 | vm_offset_t high_addr; /* physical address */ |
| | 106 | vm_offset_t low_page; /* physical page */ |
| | 107 | vm_offset_t offset; /* offset on page */ |
| | 108 | vm_size_t length; |
| | 109 | }; |
| | 110 | |
| | 111 | typedef struct himem_link *hil_t; |
| | 112 | |
| | 113 | |
| | 114 | #define HIGH_MEM ((vm_offset_t) 0xf00000) |
| | 115 | |
| | 116 | #define _high_mem_page(x) ((vm_offset_t)(x) >= HIGH_MEM) |
| | 117 | |
| | 118 | |
| | 119 | #if HIMEM_STATS |
| | 120 | #define high_mem_page(x) \ |
| | 121 | (++himem_request && _high_mem_page(x) && ++himem_used) |
| | 122 | |
| | 123 | #else /* HIMEM_STATS */ |
| | 124 | #define high_mem_page(x) _high_mem_page(x) |
| | 125 | #endif /* HIMEM_STATS */ |
| | 126 | |
| | 127 | extern void himem_init(void); |
| | 128 | extern void himem_reserve( |
| | 129 | int npages); |
| | 130 | extern vm_offset_t himem_convert( |
| | 131 | vm_offset_t paddr, |
| | 132 | vm_size_t len, |
| | 133 | int op, |
| | 134 | hil_t * hil); |
| | 135 | extern void himem_revert( |
| | 136 | hil_t hil); |
| | 137 | |
| | 138 | #endif /* _I386AT_HIMEM_H_ */ |
projects / apple / xnu.git / blame_incremental