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
|
#
# Copyright (c) 1998 Doug Rabson
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $Id: bus_if.m,v 1.10 1999/05/14 11:22:39 dfr Exp $
#
INTERFACE bus;
#
# Default implementations of some methods.
#
CODE {
static struct resource *
null_alloc_resource(device_t dev, device_t child,
int type, int *rid,
u_long start, u_long end,
u_long count, u_int flags)
{
return 0;
}
};
#
# This is called from system code which prints out a description of a
# device. It should describe the attachment that the child has with
# the parent. For instance the TurboLaser bus prints which node the
# device is attached to.
#
METHOD void print_child {
device_t dev;
device_t child;
};
#
# These two methods manage a bus specific set of instance variables of
# a child device. The intention is that each different type of bus
# defines a set of appropriate instance variables (such as ports and
# irqs for ISA bus etc.)
#
# This information could be given to the child device as a struct but
# that makes it hard for a bus to add or remove variables without
# forcing an edit and recompile for all drivers which may not be
# possible for vendor supplied binary drivers.
#
# Read an instance variable. Return 0 on success.
#
METHOD int read_ivar {
device_t dev;
device_t child;
int index;
uintptr_t *result;
};
#
# Write an instance variable. Return 0 on success.
#
METHOD int write_ivar {
device_t dev;
device_t child;
int index;
uintptr_t value;
};
#
# Called after the child's DEVICE_DETACH method to allow the parent
# to reclaim any resources allocated on behalf of the child.
#
METHOD void child_detached {
device_t dev;
device_t child;
};
#
# Called when a new driver is added to the devclass which owns this
# bus. The generic implementation of this method attempts to probe and
# attach any un-matched children of the bus.
#
METHOD void driver_added {
device_t dev;
driver_t *driver;
}
#
# For busses which use use drivers supporting DEVICE_IDENTIFY to
# enumerate their devices, these methods are used to create new
# device instances. If place is non-NULL, the new device will be
# added after the last existing child with the same order.
#
METHOD device_t add_child {
device_t dev;
int order;
const char *name;
int unit;
};
#
# Allocate a system resource attached to `dev' on behalf of `child'.
# The types are defined in <machine/resource.h>; the meaning of the
# resource-ID field varies from bus to bus (but *rid == 0 is always
# valid if the resource type is). start and end reflect the allowable
# range, and should be passed as `0UL' and `~0UL', respectively, if
# the client has no range restriction. count is the number of consecutive
# indices in the resource required. flags is a set of sharing flags
# as defined in <sys/rman.h>.
#
# Returns a resource or a null pointer on failure. The caller is
# responsible for calling rman_activate_resource() when it actually
# uses the resource.
#
METHOD struct resource * alloc_resource {
device_t dev;
device_t child;
int type;
int *rid;
u_long start;
u_long end;
u_long count;
u_int flags;
} DEFAULT null_alloc_resource;
METHOD int activate_resource {
device_t dev;
device_t child;
int type;
int rid;
struct resource *r;
};
METHOD int deactivate_resource {
device_t dev;
device_t child;
int type;
int rid;
struct resource *r;
};
#
# Free a resource allocated by the preceding method. The `rid' value
# must be the same as the one returned by BUS_ALLOC_RESOURCE (which
# is not necessarily the same as the one the client passed).
#
METHOD int release_resource {
device_t dev;
device_t child;
int type;
int rid;
struct resource *res;
};
METHOD int setup_intr {
device_t dev;
device_t child;
struct resource *irq;
int flags;
driver_intr_t *intr;
void *arg;
void **cookiep;
};
METHOD int teardown_intr {
device_t dev;
device_t child;
struct resource *irq;
void *cookie;
};
|
