1 /* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_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 License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* 29 * @OSF_COPYRIGHT@ 30 */ 31 /* 32 * Mach Operating System 33 * Copyright (c) 1991,1990 Carnegie Mellon University 34 * All Rights Reserved. 35 * 36 * Permission to use, copy, modify and distribute this software and its 37 * documentation is hereby granted, provided that both the copyright 38 * notice and this permission notice appear in all copies of the 39 * software, derivative works or modified versions, and any portions 40 * thereof, and that both notices appear in supporting documentation. 41 * 42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 45 * 46 * Carnegie Mellon requests users of this software to return to 47 * 48 * Software Distribution Coordinator or [email protected] 49 * School of Computer Science 50 * Carnegie Mellon University 51 * Pittsburgh PA 15213-3890 52 * 53 * any improvements or extensions that they make and grant Carnegie Mellon 54 * the rights to redistribute these changes. 55 */ 56 57 /* 58 */ 59 60 #ifndef _I386_IOPB_H_ 61 #define _I386_IOPB_H_ 62 63 #include <i386/tss.h> 64 #include <kern/queue.h> 65 66 /* 67 * IO permission bitmap. 68 * 69 * Allows only IO ports 0 .. 0xffff: for ISA machines. 70 */ 71 72 #define iopb_howmany(a, b) (((a)+(b)-1)/(b)) 73 74 #define IOPB_MAX 0xffff /* x86 allows ports 0..ffff */ 75 #define IOPB_BYTES (iopb_howmany(IOPB_MAX+1,8)) 76 77 typedef unsigned char isa_iopb[IOPB_BYTES]; 78 79 /* 80 * An IO permission map is a task segment with an IO permission bitmap. 81 */ 82 83 struct iopb_tss { 84 struct i386_tss tss; /* task state segment */ 85 isa_iopb bitmap; /* bitmap of mapped IO ports */ 86 unsigned int barrier; /* bitmap barrier for CPU slop */ 87 queue_head_t io_port_list; /* list of mapped IO ports */ 88 int iopb_desc[2]; /* descriptor for this TSS */ 89 }; 90 91 typedef struct iopb_tss *iopb_tss_t; 92 93 #endif /* _I386_IOPB_H_ */ 94