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 | * | |
| 37839358 A |
6 | * The contents of this file constitute Original Code as defined in and |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the | |
| 8 | * "License"). You may not use this file except in compliance with the | |
| 9 | * License. Please obtain a copy of the License at | |
| 10 | * http://www.apple.com/publicsource and read it before using this file. | |
| e5568f75 | 11 | * |
| 37839358 A |
12 | * This Original Code and all software distributed under the License are |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 1c79356b A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
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16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| 17 | * License for the specific language governing rights and limitations | |
| 18 | * under the License. | |
| 1c79356b A |
19 | * |
| 20 | * @APPLE_LICENSE_HEADER_END@ | |
| 21 | */ | |
| 22 | /* | |
| 23 | * @OSF_COPYRIGHT@ | |
| 24 | */ | |
| 25 | /* | |
| 26 | * Mach Operating System | |
| 27 | * Copyright (c) 1991,1990 Carnegie Mellon University | |
| 28 | * All Rights Reserved. | |
| 29 | * | |
| 30 | * Permission to use, copy, modify and distribute this software and its | |
| 31 | * documentation is hereby granted, provided that both the copyright | |
| 32 | * notice and this permission notice appear in all copies of the | |
| 33 | * software, derivative works or modified versions, and any portions | |
| 34 | * thereof, and that both notices appear in supporting documentation. | |
| 35 | * | |
| 36 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" | |
| 37 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR | |
| 38 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. | |
| 39 | * | |
| 40 | * Carnegie Mellon requests users of this software to return to | |
| 41 | * | |
| 42 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU | |
| 43 | * School of Computer Science | |
| 44 | * Carnegie Mellon University | |
| 45 | * Pittsburgh PA 15213-3890 | |
| 46 | * | |
| 47 | * any improvements or extensions that they make and grant Carnegie Mellon | |
| 48 | * the rights to redistribute these changes. | |
| 49 | */ | |
| 50 | ||
| 51 | /* | |
| 52 | */ | |
| 53 | ||
| 54 | #ifndef _I386_IOPB_H_ | |
| 55 | #define _I386_IOPB_H_ | |
| 56 | ||
| 57 | #include <i386/tss.h> | |
| 58 | #include <kern/queue.h> | |
| 59 | ||
| 60 | /* | |
| 61 | * IO permission bitmap. | |
| 62 | * | |
| 63 | * Allows only IO ports 0 .. 0xffff: for ISA machines. | |
| 64 | */ | |
| 65 | ||
| 66 | #define iopb_howmany(a,b) (((a)+(b)-1)/(b)) | |
| 67 | ||
| 68 | #define IOPB_MAX 0xffff /* x86 allows ports 0..ffff */ | |
| 69 | #define IOPB_BYTES (iopb_howmany(IOPB_MAX+1,8)) | |
| 70 | ||
| 71 | typedef unsigned char isa_iopb[IOPB_BYTES]; | |
| 72 | ||
| 73 | /* | |
| 74 | * An IO permission map is a task segment with an IO permission bitmap. | |
| 75 | */ | |
| 76 | ||
| 77 | struct iopb_tss { | |
| 78 | struct i386_tss tss; /* task state segment */ | |
| 79 | isa_iopb bitmap; /* bitmap of mapped IO ports */ | |
| 80 | unsigned int barrier; /* bitmap barrier for CPU slop */ | |
| 81 | queue_head_t io_port_list; /* list of mapped IO ports */ | |
| 82 | int iopb_desc[2]; /* descriptor for this TSS */ | |
| 83 | }; | |
| 84 | ||
| 85 | typedef struct iopb_tss *iopb_tss_t; | |
| 86 | ||
| 87 | #endif /* _I386_IOPB_H_ */ |