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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
* Mach Operating System
* Copyright (c) 1993-1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: busses.c
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 4/90
*
* Generic autoconfiguration functions,
* usable to probe and attach devices
* on any bus that suits the generic bus
* structure, such as VME, TURBOChannel,
* and all the VAX busses.
*
*/
#include <string.h>
#include <kern/printf.h>
#include <mach/boolean.h>
#include <mach/std_types.h>
#include <chips/busses.h>
/*
* configure_bus_master
*
* Given the name of a bus_ctlr, look it up in the
* init table. If found, probe it. If there can be
* slaves attached, walk the device's init table
* for those that might be attached to this controller.
* Call the 'slave' function on each one to see if
* ok, then the 'attach' one.
*
* Returns 0 if the controller is not there.
*
*/
boolean_t configure_bus_master(
const char *name,
vm_offset_t virt,
vm_offset_t phys,
int adpt_no,
const char *bus_name)
{
struct bus_device *device;
struct bus_ctlr *master;
struct bus_driver *driver;
boolean_t found = FALSE;
/*
* Match the name in the table, then pick the entry that has the
* right adaptor number, or one that has it wildcarded. Entries
* already allocated are marked alive, skip them.
*/
for (master = bus_master_init; master->driver; master++) {
if (master->alive)
continue;
if (((master->adaptor == adpt_no) || (master->adaptor == '?')) &&
(strcmp(master->name, name) == 0)) {
found = TRUE;
break;
}
}
if (!found)
return FALSE;
/*
* Found a match, probe it
*/
driver = master->driver;
if ((*driver->probe) (virt, master) == 0)
return FALSE;
master->alive = 1;
master->adaptor = adpt_no;
/*
* Remember which controller this device is attached to
*/
driver->minfo[master->unit] = master;
printf("%s%d: at %s%d\n", master->name, master->unit, bus_name, adpt_no);
/*
* Now walk all devices to check those that might be attached to this
* controller. We match the unallocated ones that have the right
* controller number, or that have a widcarded controller number.
*/
for (device = bus_device_init; device->driver; device++) {
int ctlr;
if (device->alive || device->driver != driver ||
(device->adaptor != '?' && device->adaptor != adpt_no))
continue;
ctlr = device->ctlr;
if (ctlr == '?') device->ctlr = master->unit;
/*
* A matching entry. See if the slave-probing routine is
* happy.
*/
if ((device->ctlr != master->unit) ||
((*driver->slave) (device, virt) == 0)) {
device->ctlr = ctlr;
continue;
}
device->alive = 1;
device->adaptor = adpt_no;
device->ctlr = master->unit;
/*
* Save a backpointer to the controller
*/
device->mi = master;
/*
* ..and to the device
*/
driver->dinfo[device->unit] = device;
if (device->slave >= 0)
printf(" %s%d: at %s%d slave %d",
device->name, device->unit,
driver->mname, master->unit, device->slave);
else
printf(" %s%d: at %s%d",
device->name, device->unit,
driver->mname, master->unit);
/*
* Now attach this slave
*/
(*driver->attach) (device);
printf("\n");
}
return TRUE;
}
/*
* configure_bus_device
*
* Given the name of a bus_device, look it up in the
* init table. If found, probe it. If it is present,
* call the driver's 'attach' function.
*
* Returns 0 if the device is not there.
*
*/
boolean_t configure_bus_device(
const char *name,
vm_offset_t virt,
vm_offset_t phys,
int adpt_no,
const char *bus_name)
{
struct bus_device *device;
struct bus_driver *driver;
boolean_t found = FALSE;
/*
* Walk all devices to find one with the right name
* and adaptor number (or wildcard). The entry should
* be unallocated, and also the slave number should
* be wildcarded.
*/
for (device = bus_device_init; device->driver; device++) {
if (device->alive)
continue;
if (((device->adaptor == adpt_no) || (device->adaptor == '?')) &&
(device->slave == -1) &&
((!device->phys_address) ||
((device->phys_address == phys) && (device->address == virt))) &&
(strcmp(device->name, name) == 0)) {
found = TRUE;
break;
}
}
if (!found)
return FALSE;
/*
* Found an entry, probe the device
*/
driver = device->driver;
if ((*driver->probe) (virt, (struct bus_ctlr *)device) == 0)
return FALSE;
device->alive = 1;
device->adaptor = adpt_no;
printf("%s%d: at %s%d", device->name, device->unit, bus_name, adpt_no);
/*
* Remember which driver this device is attached to
*/
driver->dinfo[device->unit] = device;
/*
* Attach the device
*/
(*driver->attach) (device);
printf("\n");
return TRUE;
}
|
