projects / apple / xnu.git / blame
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|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| ff6e181a A |
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. Please obtain a copy of the License at | |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 11 | * file. | |
| 1c79356b | 12 | * |
| ff6e181a A |
13 | * The Original Code and all software distributed under the License are |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 1c79356b A |
15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| ff6e181a A |
17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 18 | * Please see the License for the specific language governing rights and | |
| 19 | * limitations under the License. | |
| 1c79356b A |
20 | * |
| 21 | * @APPLE_LICENSE_HEADER_END@ | |
| 22 | */ | |
| 23 | /* | |
| 24 | * @OSF_FREE_COPYRIGHT@ | |
| 25 | */ | |
| 26 | /* | |
| 27 | * HISTORY | |
| 28 | * | |
| 29 | * Revision 1.1.1.1 1998/09/22 21:05:38 wsanchez | |
| 30 | * Import of Mac OS X kernel (~semeria) | |
| 31 | * | |
| 32 | * Revision 1.1.1.1 1998/03/07 02:25:39 wsanchez | |
| 33 | * Import of OSF Mach kernel (~mburg) | |
| 34 | * | |
| 35 | * Revision 1.3.11.4 1995/12/15 10:49:49 bernadat | |
| 36 | * cbus includes moved to busses/cbus | |
| 37 | * [95/12/15 bernadat] | |
| 38 | * | |
| 39 | * Revision 1.3.11.3 1995/08/21 20:33:23 devrcs | |
| 40 | * ri-osc CR1547: Fix himem buffer translation to cope with non | |
| 41 | * page-aligned addresses. | |
| 42 | * [1995/08/08 16:52:06 bolinger] | |
| 43 | * | |
| 44 | * Revision 1.3.11.2 1995/01/26 22:14:56 ezf | |
| 45 | * removed extraneous CMU CR | |
| 46 | * [1995/01/26 20:24:48 ezf] | |
| 47 | * | |
| 48 | * Revision 1.3.9.2 1994/06/08 21:14:27 dswartz | |
| 49 | * Preemption merge. | |
| 50 | * [1994/06/08 21:12:31 dswartz] | |
| 51 | * | |
| 52 | * Revision 1.3.9.1 1994/05/19 20:30:30 dwm | |
| 53 | * mk6 CR 80. Add himem_init prototype. | |
| 54 | * [1994/05/19 20:30:10 dwm] | |
| 55 | * | |
| 56 | * Revision 1.3.2.3 1993/08/09 19:37:21 dswartz | |
| 57 | * Add ANSI prototypes - CR#9523 | |
| 58 | * [1993/08/06 17:50:06 dswartz] | |
| 59 | * | |
| 60 | * Revision 1.3.2.2 1993/06/09 02:25:24 gm | |
| 61 | * CR9176 - ANSI C violations: trailing tokens on CPP | |
| 62 | * directives, extra semicolons after decl_ ..., asm keywords | |
| 63 | * [1993/06/07 18:58:40 jeffc] | |
| 64 | * | |
| 65 | * Added to OSF/1 R1.3 from NMK15.0. | |
| 66 | * [1993/06/02 21:01:57 jeffc] | |
| 67 | * | |
| 68 | * Revision 1.3 1993/04/19 16:09:54 devrcs | |
| 69 | * Use free copyright | |
| 70 | * [1993/03/03 12:12:12 bernadat] | |
| 71 | * | |
| 72 | * Revision 1.2 1992/11/25 01:07:16 robert | |
| 73 | * integrate changes below for norma_14 | |
| 74 | * [1992/11/13 19:28:57 robert] | |
| 75 | * | |
| 76 | * $EndLog$ | |
| 77 | */ | |
| 78 | ||
| 79 | #ifndef _I386AT_HIMEM_H_ | |
| 80 | #define _I386AT_HIMEM_H_ | |
| 81 | ||
| 82 | /* | |
| 83 | * support of memory above 16 Megs for DMA limited to memory | |
| 84 | * below 16 Megs. | |
| 85 | */ | |
| 86 | ||
| 87 | #include <platforms.h> | |
| 88 | ||
| 89 | #define HIMEM_STATS 0 | |
| 90 | ||
| 91 | #if HIMEM_STATS | |
| 92 | extern int himem_request; | |
| 93 | extern int himem_used; | |
| 94 | #endif /* HIMEM_STATS */ | |
| 95 | ||
| 96 | struct himem_link { | |
| 97 | struct himem_link *next; | |
| 98 | vm_offset_t high_addr; /* physical address */ | |
| 99 | vm_offset_t low_page; /* physical page */ | |
| 100 | vm_offset_t offset; /* offset on page */ | |
| 101 | vm_size_t length; | |
| 102 | }; | |
| 103 | ||
| 104 | typedef struct himem_link *hil_t; | |
| 105 | ||
| 106 | ||
| 107 | #define HIGH_MEM ((vm_offset_t) 0xf00000) | |
| 108 | ||
| 109 | #define _high_mem_page(x) ((vm_offset_t)(x) >= HIGH_MEM) | |
| 110 | ||
| 111 | ||
| 112 | #if HIMEM_STATS | |
| 113 | #define high_mem_page(x) \ | |
| 114 | (++himem_request && _high_mem_page(x) && ++himem_used) | |
| 115 | ||
| 116 | #else /* HIMEM_STATS */ | |
| 117 | #define high_mem_page(x) _high_mem_page(x) | |
| 118 | #endif /* HIMEM_STATS */ | |
| 119 | ||
| 120 | extern void himem_init(void); | |
| 121 | extern void himem_reserve( | |
| 122 | int npages); | |
| 123 | extern vm_offset_t himem_convert( | |
| 124 | vm_offset_t paddr, | |
| 125 | vm_size_t len, | |
| 126 | int op, | |
| 127 | hil_t * hil); | |
| 128 | extern void himem_revert( | |
| 129 | hil_t hil); | |
| 130 | ||
| 131 | #endif /* _I386AT_HIMEM_H_ */ |