| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 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. |
| | 11 | * |
| | 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 |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 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. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_END@ |
| | 21 | */ |
| | 22 | /* |
| | 23 | * @OSF_COPYRIGHT@ |
| | 24 | */ |
| | 25 | /* |
| | 26 | * HISTORY |
| | 27 | * |
| | 28 | * Revision 1.1.1.1 1998/09/22 21:05:34 wsanchez |
| | 29 | * Import of Mac OS X kernel (~semeria) |
| | 30 | * |
| | 31 | * Revision 1.1.1.1 1998/03/07 02:25:54 wsanchez |
| | 32 | * Import of OSF Mach kernel (~mburg) |
| | 33 | * |
| | 34 | * Revision 1.1.6.1 1996/09/17 16:26:58 bruel |
| | 35 | * use standalone includes only |
| | 36 | * [1996/09/17 15:38:08 bruel] |
| | 37 | * |
| | 38 | * Revision 1.1.4.1 1996/02/02 12:16:40 emcmanus |
| | 39 | * Copied from nmk20b5_shared. |
| | 40 | * [1996/02/01 16:56:11 emcmanus] |
| | 41 | * |
| | 42 | * Revision 1.1.2.1 1995/12/30 17:12:07 emcmanus |
| | 43 | * Renamed from i386/etap_map.c and made this file machine-independent. |
| | 44 | * Delete declarations of event_table and subs_table, now declared with |
| | 45 | * different types in etap_macros.h. |
| | 46 | * [1995/12/30 17:03:55 emcmanus] |
| | 47 | * |
| | 48 | * Revision 1.1.2.4 1995/10/09 17:07:21 devrcs |
| | 49 | * Merged in RT3_SHARED ETAP code. |
| | 50 | * [1995/09/13 18:48:15 joe] |
| | 51 | * |
| | 52 | * Revision 1.1.2.3 1995/09/18 19:10:05 devrcs |
| | 53 | * Merged in RT3_SHARED ETAP code. |
| | 54 | * [1995/09/13 18:48:15 joe] |
| | 55 | * |
| | 56 | * Revision 1.1.2.2 1995/01/10 04:51:59 devrcs |
| | 57 | * mk6 CR801 - merge up from nmk18b4 to nmk18b7 |
| | 58 | * tweak signatures, a la osc1.3b26 |
| | 59 | * [1994/12/09 20:38:32 dwm] |
| | 60 | * |
| | 61 | * mk6 CR801 - new file for mk6_shared from cnmk_shared. |
| | 62 | * [1994/12/01 21:11:35 dwm] |
| | 63 | * |
| | 64 | * Revision 1.1.2.1 1994/10/21 18:35:57 joe |
| | 65 | * Initial ETAP submission |
| | 66 | * [1994/10/20 19:21:39 joe] |
| | 67 | * |
| | 68 | * $EndLog$ |
| | 69 | */ |
| | 70 | /* |
| | 71 | * File : etap_map.c |
| | 72 | * |
| | 73 | * Pseudo-device driver to calculate the virtual addresses |
| | 74 | * of all mappable ETAP buffers and tables: event table, |
| | 75 | * subsystem table, cumulative buffer and monitor buffers. |
| | 76 | * |
| | 77 | */ |
| | 78 | /* |
| | 79 | * Minor device number representation: |
| | 80 | * |
| | 81 | * 0 = ETAP_TABLE_EVENT |
| | 82 | * 1 = ETAP_TABLE_SUBSYSTEM |
| | 83 | * 2 = ETAP_BUFFER_CUMULATIVE |
| | 84 | * 3 & up = a specific monitor buffer |
| | 85 | * |
| | 86 | */ |
| | 87 | |
| | 88 | #include <types.h> |
| | 89 | |
| | 90 | #include <mach/vm_prot.h> |
| | 91 | #include <mach/vm_param.h> |
| | 92 | #include <mach/kern_return.h> |
| | 93 | #include <vm/pmap.h> |
| | 94 | #include <device/io_req.h> |
| | 95 | #include <device/dev_hdr.h> |
| | 96 | |
| | 97 | #include <cpus.h> |
| | 98 | #include <kern/etap_options.h> |
| | 99 | #include <mach/etap.h> |
| | 100 | #include <kern/etap_map.h> |
| | 101 | |
| | 102 | |
| | 103 | #if ETAP_LOCK_ACCUMULATE |
| | 104 | extern cumulative_buffer_t cbuff; |
| | 105 | #endif /* ETAP_LOCK_ACCUMULATE */ |
| | 106 | |
| | 107 | #if ETAP_MONITOR |
| | 108 | extern monitor_buffer_t mbuff[]; |
| | 109 | #endif /* ETAP_MONITOR */ |
| | 110 | |
| | 111 | |
| | 112 | /* |
| | 113 | * etap_map_open - Check for valid minor device |
| | 114 | */ |
| | 115 | |
| | 116 | io_return_t |
| | 117 | etap_map_open( |
| | 118 | dev_t dev, |
| | 119 | dev_mode_t flags, |
| | 120 | io_req_t ior) |
| | 121 | { |
| | 122 | int buffer = minor(dev); |
| | 123 | |
| | 124 | if (buffer >= ETAP_MAX_DEVICES) |
| | 125 | return(D_NO_SUCH_DEVICE); |
| | 126 | |
| | 127 | return(D_SUCCESS); |
| | 128 | } |
| | 129 | |
| | 130 | vm_offset_t |
| | 131 | etap_map_mmap ( |
| | 132 | dev_t dev, |
| | 133 | vm_offset_t off, |
| | 134 | vm_prot_t prot) |
| | 135 | { |
| | 136 | int buffer = minor(dev); |
| | 137 | vm_offset_t addr; |
| | 138 | |
| | 139 | /* |
| | 140 | * Check request validity |
| | 141 | */ |
| | 142 | |
| | 143 | if (prot & VM_PROT_WRITE) |
| | 144 | return(KERN_PROTECTION_FAILURE); |
| | 145 | |
| | 146 | if (buffer < 0 || buffer >= ETAP_MAX_DEVICES) |
| | 147 | return(KERN_INVALID_ARGUMENT); |
| | 148 | |
| | 149 | switch(buffer) { |
| | 150 | case ETAP_TABLE_EVENT : |
| | 151 | addr = trunc_page((char *) event_table) + off; |
| | 152 | break; |
| | 153 | case ETAP_TABLE_SUBSYSTEM : |
| | 154 | addr = trunc_page((char *) subs_table) + off; |
| | 155 | break; |
| | 156 | case ETAP_BUFFER_CUMULATIVE : |
| | 157 | #if ETAP_LOCK_ACCUMULATE |
| | 158 | addr = (vm_offset_t) cbuff + off; |
| | 159 | break; |
| | 160 | #else /* ETAP_LOCK_ACCUMULATE */ |
| | 161 | return(KERN_INVALID_ARGUMENT); |
| | 162 | #endif /* ETAP_LOCK_ACCUMULATE */ |
| | 163 | |
| | 164 | default : |
| | 165 | #if ETAP_MONITOR |
| | 166 | addr = (vm_offset_t) mbuff[buffer - 3] + off; |
| | 167 | break; |
| | 168 | #else /* ETAP_MONITOR */ |
| | 169 | return(KERN_INVALID_ARGUMENT); |
| | 170 | #endif /* ETAP_MONITOR */ |
| | 171 | |
| | 172 | } |
| | 173 | return machine_btop(pmap_extract(pmap_kernel(), addr)); |
| | 174 | } |
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