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
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/* Shm_Initialization
*
* This routine is the shared memory communications initerface
* driver initialization routine.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* 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.
*
* $Id$
*/
#define _SHM_INIT
#include <rtems.h>
#include <shm.h>
#include <string.h> /* memset() */
/*
* User extension to install MPCI_Fatal as a fatal error
* handler extension
*/
rtems_extensions_table MPCI_Shm_extensions;
rtems_mpci_entry Shm_Initialization( void )
{
rtems_unsigned32 i, all_initialized;
rtems_unsigned32 interrupt_cause, interrupt_value;
void *interrupt_address;
Shm_Node_status_control *nscb;
rtems_unsigned32 extension_id; /* for installation of MPCI_Fatal */
rtems_unsigned32 remaining_memory;
/* XXX these should use "public" methods to set their values.... */
rtems_configuration_table *configuration = _Configuration_Table;
rtems_multiprocessing_table *mp_configuration = _Configuration_MP_table;
Shm_RTEMS_Configuration = configuration;
Shm_RTEMS_MP_Configuration = mp_configuration;
Shm_Local_node = Shm_RTEMS_MP_Configuration->node;
Shm_Maximum_nodes = Shm_RTEMS_MP_Configuration->maximum_nodes;
Shm_Get_configuration( Shm_Local_node, &Shm_Configuration );
Shm_Receive_message_count = 0;
Shm_Null_message_count = 0;
Shm_Interrupt_count = 0;
/*
* Set the Node Status indicators
*/
Shm_Pending_initialization =
Shm_Convert(rtems_build_name( 'P', 'E', 'N', 'D' ));
Shm_Initialization_complete =
Shm_Convert(rtems_build_name( 'C', 'O', 'M', 'P' ));
Shm_Active_node =
Shm_Convert(rtems_build_name( 'A', 'C', 'T', 'V' ));
/*
* Initialize the constants used by the Locked Queue code.
*/
Shm_Locked_queue_End_of_list = Shm_Convert( 0xffffffff );
Shm_Locked_queue_Not_on_list = Shm_Convert( 0xfffffffe );
/*
* Set the base addresses for the:
* + Node Status Table
* + Free Pool and Receive Queues
* + Envelopes
*/
Shm_Node_statuses = (Shm_Node_status_control *) START_NS_CBS;
Shm_Locked_queues = (Shm_Locked_queue_Control *) START_LQ_CBS;
Shm_Envelopes = (Shm_Envelope_control *) START_ENVELOPES;
/*
* Calculate the maximum number of envelopes which can be
* placed the remaining shared memory.
*/
remaining_memory =
((void *)Shm_Configuration->base + Shm_Configuration->length) -
((void *)Shm_Envelopes);
Shm_Maximum_envelopes = remaining_memory / sizeof( Shm_Envelope_control );
Shm_Maximum_envelopes -= 1;
/*
* Set the pointer to the receive queue for the local node.
* When we receive a node, we will get it from here before
* processing it.
*/
Shm_Local_receive_queue = &Shm_Locked_queues[ Shm_Local_node ];
Shm_Local_node_status = &Shm_Node_statuses[ Shm_Local_node ];
/*
* Convert local interrupt cause information into the
* neutral format so other nodes will be able to
* understand it.
*/
interrupt_address =
(void *) Shm_Convert( (rtems_unsigned32)Shm_Configuration->Intr.address );
interrupt_value = Shm_Convert( Shm_Configuration->Intr.value );
interrupt_cause = Shm_Convert( Shm_Configuration->Intr.length );
if ( Shm_Configuration->poll_intr == POLLED_MODE ) Shm_setclockvec();
else Shm_setvec();
if ( Shm_Is_master_node() ) {
/*
* Zero out the shared memory area.
*/
(void) memset(
(void *) Shm_Configuration->base,
0,
Shm_Configuration->length
);
/*
* Initialize all of the locked queues (the free envelope
* pool and a receive queue per node) and set all of the
* node's status so they will be waiting to initialization
* to complete.
*/
Shm_Locked_queue_Initialize( FREE_ENV_CB, FREE_ENV_POOL );
for ( i=SHM_FIRST_NODE ; i<=Shm_Maximum_nodes ; i++ ) {
Shm_Initialize_receive_queue( i );
Shm_Node_statuses[ i ].status = Shm_Pending_initialization;
Shm_Node_statuses[ i ].error = 0;
}
/*
* Initialize all of the envelopes and place them in the
* free pool.
*/
for ( i=0 ; i<Shm_Maximum_envelopes ; i++ ) {
Shm_Envelopes[ i ].index = Shm_Convert(i);
Shm_Free_envelope( &Shm_Envelopes[ i ] );
}
/*
* Initialize this node's interrupt information in the
* shared area so other nodes can interrupt us.
*/
Shm_Local_node_status->int_address = (rtems_unsigned32) interrupt_address;
Shm_Local_node_status->int_value = interrupt_value;
Shm_Local_node_status->int_length = interrupt_cause;
Shm_Local_node_status->status = Shm_Initialization_complete;
/*
* Loop until all nodes have completed initialization.
*/
do {
all_initialized = 1;
for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ )
if ( Shm_Node_statuses[ i ].status != Shm_Initialization_complete )
all_initialized = 0;
} while ( all_initialized == 0 );
/*
* Tell the other nodes we think that the system is up.
*/
for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ )
Shm_Node_statuses[ i ].status = Shm_Active_node;
} else { /* is not MASTER node */
/*
* Initialize the node status for the non-master nodes.
* Because the master node zeroes out memory, it is
* necessary for them to keep putting their values in
* the node status area until the master says they
* should become active.
*/
Shm_Local_node_status->status = Shm_Pending_initialization;
do {
if ( Shm_Local_node_status->status == Shm_Pending_initialization ) {
/*
* Initialize this node's interrupt information in the
* shared area so other nodes can interrupt us.
*/
Shm_Local_node_status->int_address =
(rtems_unsigned32) interrupt_address;
Shm_Local_node_status->int_value = interrupt_value;
Shm_Local_node_status->int_length = interrupt_cause;
Shm_Local_node_status->status = Shm_Initialization_complete;
}
} while ( Shm_Local_node_status->status != Shm_Active_node ) ;
}
/*
* Initialize the Interrupt Information Table
*/
for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ ) {
nscb = &Shm_Node_statuses[ i ];
Shm_Interrupt_table[i].address = Shm_Convert_address(
(void *)Shm_Convert(((vol_u32) nscb->int_address))
);
Shm_Interrupt_table[i].value = Shm_Convert( nscb->int_value );
Shm_Interrupt_table[i].length = Shm_Convert( nscb->int_length );
}
MPCI_Shm_extensions.fatal = MPCI_Fatal;
(void) rtems_extension_create(
rtems_build_name( 'M', 'P', 'E', 'X' ),
&MPCI_Shm_extensions,
&extension_id
);
}
|
