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1.1 root 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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