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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | /* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * HISTORY * * Revision 1.1.1.1 1998/09/22 21:05:34 wsanchez * Import of Mac OS X kernel (~semeria) * * Revision 1.1.1.1 1998/03/07 02:25:54 wsanchez * Import of OSF Mach kernel (~mburg) * * Revision 1.1.6.1 1996/09/17 16:26:58 bruel * use standalone includes only * [1996/09/17 15:38:08 bruel] * * Revision 1.1.4.1 1996/02/02 12:16:40 emcmanus * Copied from nmk20b5_shared. * [1996/02/01 16:56:11 emcmanus] * * Revision 1.1.2.1 1995/12/30 17:12:07 emcmanus * Renamed from i386/etap_map.c and made this file machine-independent. * Delete declarations of event_table and subs_table, now declared with * different types in etap_macros.h. * [1995/12/30 17:03:55 emcmanus] * * Revision 1.1.2.4 1995/10/09 17:07:21 devrcs * Merged in RT3_SHARED ETAP code. * [1995/09/13 18:48:15 joe] * * Revision 1.1.2.3 1995/09/18 19:10:05 devrcs * Merged in RT3_SHARED ETAP code. * [1995/09/13 18:48:15 joe] * * Revision 1.1.2.2 1995/01/10 04:51:59 devrcs * mk6 CR801 - merge up from nmk18b4 to nmk18b7 * tweak signatures, a la osc1.3b26 * [1994/12/09 20:38:32 dwm] * * mk6 CR801 - new file for mk6_shared from cnmk_shared. * [1994/12/01 21:11:35 dwm] * * Revision 1.1.2.1 1994/10/21 18:35:57 joe * Initial ETAP submission * [1994/10/20 19:21:39 joe] * * $EndLog$ */ /* * File : etap_map.c * * Pseudo-device driver to calculate the virtual addresses * of all mappable ETAP buffers and tables: event table, * subsystem table, cumulative buffer and monitor buffers. * */ /* * Minor device number representation: * * 0 = ETAP_TABLE_EVENT * 1 = ETAP_TABLE_SUBSYSTEM * 2 = ETAP_BUFFER_CUMULATIVE * 3 & up = a specific monitor buffer * */ #include <types.h> #include <mach/vm_prot.h> #include <mach/vm_param.h> #include <mach/kern_return.h> #include <vm/pmap.h> #include <device/io_req.h> #include <device/dev_hdr.h> #include <cpus.h> #include <kern/etap_options.h> #include <mach/etap.h> #include <kern/etap_map.h> #if ETAP_LOCK_ACCUMULATE extern cumulative_buffer_t cbuff; #endif /* ETAP_LOCK_ACCUMULATE */ #if ETAP_MONITOR extern monitor_buffer_t mbuff[]; #endif /* ETAP_MONITOR */ /* * etap_map_open - Check for valid minor device */ io_return_t etap_map_open( dev_t dev, dev_mode_t flags, io_req_t ior) { int buffer = minor(dev); if (buffer >= ETAP_MAX_DEVICES) return(D_NO_SUCH_DEVICE); return(D_SUCCESS); } vm_offset_t etap_map_mmap ( dev_t dev, vm_offset_t off, vm_prot_t prot) { int buffer = minor(dev); vm_offset_t addr; /* * Check request validity */ if (prot & VM_PROT_WRITE) return(KERN_PROTECTION_FAILURE); if (buffer < 0 || buffer >= ETAP_MAX_DEVICES) return(KERN_INVALID_ARGUMENT); switch(buffer) { case ETAP_TABLE_EVENT : addr = trunc_page((char *) event_table) + off; break; case ETAP_TABLE_SUBSYSTEM : addr = trunc_page((char *) subs_table) + off; break; case ETAP_BUFFER_CUMULATIVE : #if ETAP_LOCK_ACCUMULATE addr = (vm_offset_t) cbuff + off; break; #else /* ETAP_LOCK_ACCUMULATE */ return(KERN_INVALID_ARGUMENT); #endif /* ETAP_LOCK_ACCUMULATE */ default : #if ETAP_MONITOR addr = (vm_offset_t) mbuff[buffer - 3] + off; break; #else /* ETAP_MONITOR */ return(KERN_INVALID_ARGUMENT); #endif /* ETAP_MONITOR */ } return machine_btop(pmap_extract(pmap_kernel(), addr)); } |