projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 8ad349bb | 4 | * @APPLE_LICENSE_OSREFERENCE_HEADER_START@ |
| 1c79356b | 5 | * |
| 8ad349bb 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. 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@ | |
| 1c79356b A |
29 | */ |
| 30 | /* | |
| 31 | * @OSF_COPYRIGHT@ | |
| 32 | */ | |
| 33 | /* | |
| 34 | * Mach Operating System | |
| 35 | * Copyright (c) 1991,1990 Carnegie Mellon University | |
| 36 | * All Rights Reserved. | |
| 37 | * | |
| 38 | * Permission to use, copy, modify and distribute this software and its | |
| 39 | * documentation is hereby granted, provided that both the copyright | |
| 40 | * notice and this permission notice appear in all copies of the | |
| 41 | * software, derivative works or modified versions, and any portions | |
| 42 | * thereof, and that both notices appear in supporting documentation. | |
| 43 | * | |
| 44 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" | |
| 45 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR | |
| 46 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. | |
| 47 | * | |
| 48 | * Carnegie Mellon requests users of this software to return to | |
| 49 | * | |
| 50 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU | |
| 51 | * School of Computer Science | |
| 52 | * Carnegie Mellon University | |
| 53 | * Pittsburgh PA 15213-3890 | |
| 54 | * | |
| 55 | * any improvements or extensions that they make and grant Carnegie Mellon | |
| 56 | * the rights to redistribute these changes. | |
| 57 | */ | |
| 58 | ||
| 59 | /* | |
| 60 | */ | |
| 61 | ||
| 62 | #ifndef _I386_IOPB_H_ | |
| 63 | #define _I386_IOPB_H_ | |
| 64 | ||
| 65 | #include <i386/tss.h> | |
| 66 | #include <kern/queue.h> | |
| 67 | ||
| 68 | /* | |
| 69 | * IO permission bitmap. | |
| 70 | * | |
| 71 | * Allows only IO ports 0 .. 0xffff: for ISA machines. | |
| 72 | */ | |
| 73 | ||
| 74 | #define iopb_howmany(a,b) (((a)+(b)-1)/(b)) | |
| 75 | ||
| 76 | #define IOPB_MAX 0xffff /* x86 allows ports 0..ffff */ | |
| 77 | #define IOPB_BYTES (iopb_howmany(IOPB_MAX+1,8)) | |
| 78 | ||
| 79 | typedef unsigned char isa_iopb[IOPB_BYTES]; | |
| 80 | ||
| 81 | /* | |
| 82 | * An IO permission map is a task segment with an IO permission bitmap. | |
| 83 | */ | |
| 84 | ||
| 85 | struct iopb_tss { | |
| 86 | struct i386_tss tss; /* task state segment */ | |
| 87 | isa_iopb bitmap; /* bitmap of mapped IO ports */ | |
| 88 | unsigned int barrier; /* bitmap barrier for CPU slop */ | |
| 89 | queue_head_t io_port_list; /* list of mapped IO ports */ | |
| 90 | int iopb_desc[2]; /* descriptor for this TSS */ | |
| 91 | }; | |
| 92 | ||
| 93 | typedef struct iopb_tss *iopb_tss_t; | |
| 94 | ||
| 95 | #endif /* _I386_IOPB_H_ */ |