1 | /* Shm_Initialization |
---|
2 | * |
---|
3 | * This routine is the shared memory communications initerface |
---|
4 | * driver initialization routine. |
---|
5 | * |
---|
6 | * Input parameters: NONE |
---|
7 | * |
---|
8 | * Output parameters: NONE |
---|
9 | * |
---|
10 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
---|
11 | * On-Line Applications Research Corporation (OAR). |
---|
12 | * All rights assigned to U.S. Government, 1994. |
---|
13 | * |
---|
14 | * This material may be reproduced by or for the U.S. Government pursuant |
---|
15 | * to the copyright license under the clause at DFARS 252.227-7013. This |
---|
16 | * notice must appear in all copies of this file and its derivatives. |
---|
17 | * |
---|
18 | * $Id$ |
---|
19 | */ |
---|
20 | |
---|
21 | #define _SHM_INIT |
---|
22 | |
---|
23 | #include <rtems.h> |
---|
24 | #include <shm.h> |
---|
25 | |
---|
26 | #include <string.h> /* memset() */ |
---|
27 | |
---|
28 | /* |
---|
29 | * User extension to install MPCI_Fatal as a fatal error |
---|
30 | * handler extension |
---|
31 | */ |
---|
32 | |
---|
33 | rtems_extensions_table MPCI_Shm_extensions; |
---|
34 | |
---|
35 | rtems_mpci_entry Shm_Initialization( void ) |
---|
36 | |
---|
37 | { |
---|
38 | rtems_unsigned32 i, all_initialized; |
---|
39 | rtems_unsigned32 interrupt_cause, interrupt_value; |
---|
40 | void *interrupt_address; |
---|
41 | Shm_Node_status_control *nscb; |
---|
42 | rtems_unsigned32 extension_id; /* for installation of MPCI_Fatal */ |
---|
43 | rtems_unsigned32 remaining_memory; |
---|
44 | /* XXX these should use "public" methods to set their values.... */ |
---|
45 | rtems_configuration_table *configuration = _Configuration_Table; |
---|
46 | rtems_multiprocessing_table *mp_configuration = _Configuration_MP_table; |
---|
47 | |
---|
48 | Shm_RTEMS_Configuration = configuration; |
---|
49 | Shm_RTEMS_MP_Configuration = mp_configuration; |
---|
50 | |
---|
51 | Shm_Local_node = Shm_RTEMS_MP_Configuration->node; |
---|
52 | Shm_Maximum_nodes = Shm_RTEMS_MP_Configuration->maximum_nodes; |
---|
53 | |
---|
54 | Shm_Get_configuration( Shm_Local_node, &Shm_Configuration ); |
---|
55 | |
---|
56 | Shm_Receive_message_count = 0; |
---|
57 | Shm_Null_message_count = 0; |
---|
58 | Shm_Interrupt_count = 0; |
---|
59 | |
---|
60 | /* |
---|
61 | * Set the Node Status indicators |
---|
62 | */ |
---|
63 | |
---|
64 | Shm_Pending_initialization = |
---|
65 | Shm_Convert(rtems_build_name( 'P', 'E', 'N', 'D' )); |
---|
66 | Shm_Initialization_complete = |
---|
67 | Shm_Convert(rtems_build_name( 'C', 'O', 'M', 'P' )); |
---|
68 | Shm_Active_node = |
---|
69 | Shm_Convert(rtems_build_name( 'A', 'C', 'T', 'V' )); |
---|
70 | |
---|
71 | /* |
---|
72 | * Initialize the constants used by the Locked Queue code. |
---|
73 | */ |
---|
74 | |
---|
75 | Shm_Locked_queue_End_of_list = Shm_Convert( 0xffffffff ); |
---|
76 | Shm_Locked_queue_Not_on_list = Shm_Convert( 0xfffffffe ); |
---|
77 | |
---|
78 | /* |
---|
79 | * Set the base addresses for the: |
---|
80 | * + Node Status Table |
---|
81 | * + Free Pool and Receive Queues |
---|
82 | * + Envelopes |
---|
83 | */ |
---|
84 | |
---|
85 | Shm_Node_statuses = (Shm_Node_status_control *) START_NS_CBS; |
---|
86 | Shm_Locked_queues = (Shm_Locked_queue_Control *) START_LQ_CBS; |
---|
87 | Shm_Envelopes = (Shm_Envelope_control *) START_ENVELOPES; |
---|
88 | |
---|
89 | /* |
---|
90 | * Calculate the maximum number of envelopes which can be |
---|
91 | * placed the remaining shared memory. |
---|
92 | */ |
---|
93 | |
---|
94 | remaining_memory = |
---|
95 | ((void *)Shm_Configuration->base + Shm_Configuration->length) - |
---|
96 | ((void *)Shm_Envelopes); |
---|
97 | |
---|
98 | Shm_Maximum_envelopes = remaining_memory / sizeof( Shm_Envelope_control ); |
---|
99 | Shm_Maximum_envelopes -= 1; |
---|
100 | |
---|
101 | /* |
---|
102 | * Set the pointer to the receive queue for the local node. |
---|
103 | * When we receive a node, we will get it from here before |
---|
104 | * processing it. |
---|
105 | */ |
---|
106 | |
---|
107 | Shm_Local_receive_queue = &Shm_Locked_queues[ Shm_Local_node ]; |
---|
108 | Shm_Local_node_status = &Shm_Node_statuses[ Shm_Local_node ]; |
---|
109 | |
---|
110 | /* |
---|
111 | * Convert local interrupt cause information into the |
---|
112 | * neutral format so other nodes will be able to |
---|
113 | * understand it. |
---|
114 | */ |
---|
115 | |
---|
116 | interrupt_address = |
---|
117 | (void *) Shm_Convert( (rtems_unsigned32)Shm_Configuration->Intr.address ); |
---|
118 | interrupt_value = Shm_Convert( Shm_Configuration->Intr.value ); |
---|
119 | interrupt_cause = Shm_Convert( Shm_Configuration->Intr.length ); |
---|
120 | |
---|
121 | if ( Shm_Configuration->poll_intr == POLLED_MODE ) Shm_setclockvec(); |
---|
122 | else Shm_setvec(); |
---|
123 | |
---|
124 | if ( Shm_Is_master_node() ) { |
---|
125 | |
---|
126 | /* |
---|
127 | * Zero out the shared memory area. |
---|
128 | */ |
---|
129 | |
---|
130 | (void) memset( |
---|
131 | (void *) Shm_Configuration->base, |
---|
132 | 0, |
---|
133 | Shm_Configuration->length |
---|
134 | ); |
---|
135 | |
---|
136 | /* |
---|
137 | * Initialize all of the locked queues (the free envelope |
---|
138 | * pool and a receive queue per node) and set all of the |
---|
139 | * node's status so they will be waiting to initialization |
---|
140 | * to complete. |
---|
141 | */ |
---|
142 | |
---|
143 | Shm_Locked_queue_Initialize( FREE_ENV_CB, FREE_ENV_POOL ); |
---|
144 | |
---|
145 | for ( i=SHM_FIRST_NODE ; i<=Shm_Maximum_nodes ; i++ ) { |
---|
146 | Shm_Initialize_receive_queue( i ); |
---|
147 | |
---|
148 | Shm_Node_statuses[ i ].status = Shm_Pending_initialization; |
---|
149 | Shm_Node_statuses[ i ].error = 0; |
---|
150 | } |
---|
151 | |
---|
152 | /* |
---|
153 | * Initialize all of the envelopes and place them in the |
---|
154 | * free pool. |
---|
155 | */ |
---|
156 | |
---|
157 | for ( i=0 ; i<Shm_Maximum_envelopes ; i++ ) { |
---|
158 | Shm_Envelopes[ i ].index = Shm_Convert(i); |
---|
159 | Shm_Free_envelope( &Shm_Envelopes[ i ] ); |
---|
160 | } |
---|
161 | |
---|
162 | /* |
---|
163 | * Initialize this node's interrupt information in the |
---|
164 | * shared area so other nodes can interrupt us. |
---|
165 | */ |
---|
166 | |
---|
167 | Shm_Local_node_status->int_address = (rtems_unsigned32) interrupt_address; |
---|
168 | Shm_Local_node_status->int_value = interrupt_value; |
---|
169 | Shm_Local_node_status->int_length = interrupt_cause; |
---|
170 | |
---|
171 | Shm_Local_node_status->status = Shm_Initialization_complete; |
---|
172 | |
---|
173 | /* |
---|
174 | * Loop until all nodes have completed initialization. |
---|
175 | */ |
---|
176 | |
---|
177 | do { |
---|
178 | all_initialized = 1; |
---|
179 | |
---|
180 | for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ ) |
---|
181 | if ( Shm_Node_statuses[ i ].status != Shm_Initialization_complete ) |
---|
182 | all_initialized = 0; |
---|
183 | |
---|
184 | } while ( all_initialized == 0 ); |
---|
185 | |
---|
186 | /* |
---|
187 | * Tell the other nodes we think that the system is up. |
---|
188 | */ |
---|
189 | |
---|
190 | for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ ) |
---|
191 | Shm_Node_statuses[ i ].status = Shm_Active_node; |
---|
192 | |
---|
193 | } else { /* is not MASTER node */ |
---|
194 | |
---|
195 | /* |
---|
196 | * Initialize the node status for the non-master nodes. |
---|
197 | * Because the master node zeroes out memory, it is |
---|
198 | * necessary for them to keep putting their values in |
---|
199 | * the node status area until the master says they |
---|
200 | * should become active. |
---|
201 | */ |
---|
202 | |
---|
203 | Shm_Local_node_status->status = Shm_Pending_initialization; |
---|
204 | |
---|
205 | do { |
---|
206 | |
---|
207 | if ( Shm_Local_node_status->status == Shm_Pending_initialization ) { |
---|
208 | |
---|
209 | /* |
---|
210 | * Initialize this node's interrupt information in the |
---|
211 | * shared area so other nodes can interrupt us. |
---|
212 | */ |
---|
213 | |
---|
214 | Shm_Local_node_status->int_address = |
---|
215 | (rtems_unsigned32) interrupt_address; |
---|
216 | Shm_Local_node_status->int_value = interrupt_value; |
---|
217 | Shm_Local_node_status->int_length = interrupt_cause; |
---|
218 | |
---|
219 | Shm_Local_node_status->status = Shm_Initialization_complete; |
---|
220 | } |
---|
221 | } while ( Shm_Local_node_status->status != Shm_Active_node ) ; |
---|
222 | } |
---|
223 | |
---|
224 | /* |
---|
225 | * Initialize the Interrupt Information Table |
---|
226 | */ |
---|
227 | |
---|
228 | for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ ) { |
---|
229 | nscb = &Shm_Node_statuses[ i ]; |
---|
230 | |
---|
231 | Shm_Interrupt_table[i].address = Shm_Convert_address( |
---|
232 | (void *)Shm_Convert(((vol_u32) nscb->int_address)) |
---|
233 | ); |
---|
234 | Shm_Interrupt_table[i].value = Shm_Convert( nscb->int_value ); |
---|
235 | Shm_Interrupt_table[i].length = Shm_Convert( nscb->int_length ); |
---|
236 | } |
---|
237 | |
---|
238 | MPCI_Shm_extensions.fatal = MPCI_Fatal; |
---|
239 | (void) rtems_extension_create( |
---|
240 | rtems_build_name( 'M', 'P', 'E', 'X' ), |
---|
241 | &MPCI_Shm_extensions, |
---|
242 | &extension_id |
---|
243 | ); |
---|
244 | } |
---|