summaryrefslogtreecommitdiffstats
path: root/c/src/exec/sapi/headers/io.h
blob: ef9fc69d03ab863685ed6e6576eda1b2aedc6b6d (plain) (blame)
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
/*  io.h
 *
 *  This include file contains all the constants and structures associated
 *  with the Input/Output Manager.  This manager provides a well defined
 *  mechanism for accessing device drivers and a structured methodology for
 *  organizing device drivers.
 *
 *  Directives provided are:
 *
 *     + initialize a device driver
 *     + open a device driver
 *     + close a device driver
 *     + read from a device driver
 *     + write to a device driver
 *     + special device services
 *
 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
 *  On-Line Applications Research Corporation (OAR).
 *  All rights assigned to U.S. Government, 1994.
 *
 *  This material may be reproduced by or for the U.S. Government pursuant
 *  to the copyright license under the clause at DFARS 252.227-7013.  This
 *  notice must appear in all copies of this file and its derivatives.
 *
 *  $Id$
 */

#ifndef __RTEMS_IO_h
#define __RTEMS_IO_h

#ifdef __cplusplus
extern "C" {
#endif

#include <rtems/config.h>

/*
 *  The following declare the data required to manage the Device Driver
 *  Address Table.
 */

EXTERN unsigned32                  _IO_Number_of_drivers;
EXTERN rtems_driver_address_table *_IO_Driver_address_table;

/*
 * Table for the io device names
 */

typedef struct {
    char                     *device_name;
    unsigned32                device_name_length;
    rtems_device_major_number major;
    rtems_device_minor_number minor;
} rtems_driver_name_t;

/*XXX this really should be allocated some better way... */
/*XXX it should probably be a chain and use a 'maximum' drivers field
 * in config table */
#define RTEMS_MAX_DRIVER_NAMES 20
EXTERN rtems_driver_name_t rtems_driver_name_table[RTEMS_MAX_DRIVER_NAMES];


/*
 *  _IO_Manager_initialization
 *
 *  DESCRIPTION:
 *
 *  This routine performs the initialization necessary for this manager.
 */

STATIC INLINE void _IO_Manager_initialization(
  rtems_driver_address_table *driver_table,
  unsigned32                          number_of_drivers
);

/*
 *  rtems_io_register_name
 *
 *  DESCRIPTION:
 *
 *  Associate a name with a driver.
 *
 */

rtems_status_code rtems_io_register_name(
    char *device_name,
    rtems_device_major_number major,
    rtems_device_minor_number minor
);


/*
 *  rtems_io_lookup_name
 *
 *  DESCRIPTION:
 *
 *  Find what driver "owns" this name
 */

rtems_status_code rtems_io_lookup_name(
    const char *pathname,
    rtems_driver_name_t **rnp
);


/*
 *  rtems_io_initialize
 *
 *  DESCRIPTION:
 *
 *  This routine implements the rtems_io_initialize directive.  It is invoked
 *  to initialize a device driver or an individual device.
 */

rtems_status_code rtems_io_initialize(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void             *argument
);

/*
 *  rtems_io_open
 *
 *  DESCRIPTION:
 *
 *  This routine implements the rtems_io_open directive.  It is invoked
 *  to open a device.
 */

rtems_status_code rtems_io_open(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void             *argument
);

/*
 *  rtems_io_close
 *
 *  DESCRIPTION:
 *
 *  This routine implements the rtems_io_close directive.  It is invoked
 *  to close a device.
 */

rtems_status_code rtems_io_close(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void             *argument
);

/*
 *  rtems_io_read
 *
 *  DESCRIPTION:
 *
 *  This routine implements the rtems_io_read directive.  It is invoked
 *  to read from a device.
 */

rtems_status_code rtems_io_read(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void             *argument
);

/*
 *  rtems_io_write
 *
 *  DESCRIPTION:
 *
 *  This routine implements the rtems_io_write directive.  It is invoked
 *  to write to a device.
 */

rtems_status_code rtems_io_write(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void             *argument
);

/*
 *  rtems_io_control
 *
 *  DESCRIPTION:
 *
 *  This routine implements the rtems_io_control directive.  It is invoked
 *  to perform a device specific operation on a device.
 */

rtems_status_code rtems_io_control(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void             *argument
);

/*
 *  _IO_Initialize_all_drivers
 *
 *  DESCRIPTION:
 *
 *  This routine initializes all of the device drivers configured
 *  in the Device Driver Address Table.
 */

void _IO_Initialize_all_drivers( void );

#include <rtems/io.inl>

#ifdef __cplusplus
}
#endif

#endif
/* end of include file */