1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @brief Distributed MP Support |
---|
5 | * @ingroup RTEMSScoreThreadMP |
---|
6 | */ |
---|
7 | |
---|
8 | /* |
---|
9 | * COPYRIGHT (c) 1989-2006. |
---|
10 | * On-Line Applications Research Corporation (OAR). |
---|
11 | * |
---|
12 | * The license and distribution terms for this file may be |
---|
13 | * found in the file LICENSE in this distribution or at |
---|
14 | * http://www.rtems.org/license/LICENSE. |
---|
15 | */ |
---|
16 | |
---|
17 | #if HAVE_CONFIG_H |
---|
18 | #include "config.h" |
---|
19 | #endif |
---|
20 | |
---|
21 | #include <rtems/score/threadimpl.h> |
---|
22 | #include <rtems/score/isrlock.h> |
---|
23 | #include <rtems/score/schedulerimpl.h> |
---|
24 | |
---|
25 | #include <string.h> |
---|
26 | |
---|
27 | static RBTREE_DEFINE_EMPTY( _Thread_MP_Active_proxies ); |
---|
28 | |
---|
29 | static CHAIN_DEFINE_EMPTY( _Thread_MP_Inactive_proxies ); |
---|
30 | |
---|
31 | ISR_LOCK_DEFINE( static, _Thread_MP_Proxies_lock, "Thread MP Proxies" ) |
---|
32 | |
---|
33 | static void _Thread_MP_Proxies_acquire( ISR_lock_Context *lock_context ) |
---|
34 | { |
---|
35 | _ISR_lock_ISR_disable_and_acquire( &_Thread_MP_Proxies_lock, lock_context ); |
---|
36 | } |
---|
37 | |
---|
38 | static void _Thread_MP_Proxies_release( ISR_lock_Context *lock_context ) |
---|
39 | { |
---|
40 | _ISR_lock_Release_and_ISR_enable( &_Thread_MP_Proxies_lock, lock_context ); |
---|
41 | } |
---|
42 | |
---|
43 | void _Thread_MP_Handler_initialization ( |
---|
44 | uint32_t maximum_proxies |
---|
45 | ) |
---|
46 | { |
---|
47 | size_t proxy_size; |
---|
48 | char *proxies; |
---|
49 | uint32_t i; |
---|
50 | |
---|
51 | if ( maximum_proxies == 0 ) { |
---|
52 | return; |
---|
53 | } |
---|
54 | |
---|
55 | proxy_size = sizeof( Thread_Proxy_control ) + _Thread_queue_Heads_size; |
---|
56 | proxies = (char *) _Thread_MP_Proxies; |
---|
57 | |
---|
58 | _Chain_Initialize( |
---|
59 | &_Thread_MP_Inactive_proxies, |
---|
60 | proxies, |
---|
61 | maximum_proxies, |
---|
62 | proxy_size |
---|
63 | ); |
---|
64 | |
---|
65 | for ( i = 0 ; i < maximum_proxies ; ++i ) { |
---|
66 | Thread_Proxy_control *proxy; |
---|
67 | |
---|
68 | proxy = (Thread_Proxy_control *) ( proxies + i * proxy_size ); |
---|
69 | |
---|
70 | _Thread_Timer_initialize( &proxy->Timer, _Per_CPU_Get_by_index( 0 ) ); |
---|
71 | _RBTree_Initialize_node( &proxy->Active ); |
---|
72 | |
---|
73 | proxy->Scheduler.nodes = &proxy->Scheduler_node; |
---|
74 | _Scheduler_Node_do_initialize( |
---|
75 | &_Scheduler_Table[ 0 ], |
---|
76 | &proxy->Scheduler_node, |
---|
77 | (Thread_Control *) proxy, |
---|
78 | 0 |
---|
79 | ); |
---|
80 | |
---|
81 | proxy->Wait.spare_heads = &proxy->Thread_queue_heads[ 0 ]; |
---|
82 | _Thread_queue_Heads_initialize( proxy->Wait.spare_heads ); |
---|
83 | } |
---|
84 | } |
---|
85 | |
---|
86 | #define THREAD_MP_PROXY_OF_ACTIVE_NODE( the_node ) \ |
---|
87 | RTEMS_CONTAINER_OF( the_node, Thread_Proxy_control, Active ) |
---|
88 | |
---|
89 | static bool _Thread_MP_Proxy_equal( |
---|
90 | const void *left, |
---|
91 | const RBTree_Node *right |
---|
92 | ) |
---|
93 | { |
---|
94 | const Objects_Id *the_left; |
---|
95 | const Thread_Proxy_control *the_right; |
---|
96 | |
---|
97 | the_left = left; |
---|
98 | the_right = THREAD_MP_PROXY_OF_ACTIVE_NODE( right ); |
---|
99 | |
---|
100 | return *the_left == the_right->Object.id; |
---|
101 | } |
---|
102 | |
---|
103 | static bool _Thread_MP_Proxy_less( |
---|
104 | const void *left, |
---|
105 | const RBTree_Node *right |
---|
106 | ) |
---|
107 | { |
---|
108 | const Objects_Id *the_left; |
---|
109 | const Thread_Proxy_control *the_right; |
---|
110 | |
---|
111 | the_left = left; |
---|
112 | the_right = THREAD_MP_PROXY_OF_ACTIVE_NODE( right ); |
---|
113 | |
---|
114 | return *the_left < the_right->Object.id; |
---|
115 | } |
---|
116 | |
---|
117 | static void *_Thread_MP_Proxy_map( RBTree_Node *node ) |
---|
118 | { |
---|
119 | return THREAD_MP_PROXY_OF_ACTIVE_NODE( node ); |
---|
120 | } |
---|
121 | |
---|
122 | Thread_Control *_Thread_MP_Allocate_proxy ( |
---|
123 | States_Control the_state |
---|
124 | ) |
---|
125 | { |
---|
126 | Thread_Proxy_control *the_proxy; |
---|
127 | ISR_lock_Context lock_context; |
---|
128 | |
---|
129 | _Thread_MP_Proxies_acquire( &lock_context ); |
---|
130 | |
---|
131 | the_proxy = (Thread_Proxy_control *) |
---|
132 | _Chain_Get_unprotected( &_Thread_MP_Inactive_proxies ); |
---|
133 | if ( the_proxy != NULL ) { |
---|
134 | Thread_Control *executing; |
---|
135 | MP_packet_Prefix *receive_packet; |
---|
136 | Objects_Id source_tid; |
---|
137 | |
---|
138 | executing = _Thread_Executing; |
---|
139 | receive_packet = _MPCI_Receive_server_tcb->receive_packet; |
---|
140 | source_tid = receive_packet->source_tid; |
---|
141 | |
---|
142 | executing->Wait.return_code = STATUS_PROXY_BLOCKING; |
---|
143 | |
---|
144 | the_proxy->receive_packet = receive_packet; |
---|
145 | the_proxy->Object.id = source_tid; |
---|
146 | the_proxy->Real_priority.priority = receive_packet->source_priority; |
---|
147 | the_proxy->current_state = _States_Set( STATES_DORMANT, the_state ); |
---|
148 | |
---|
149 | the_proxy->Wait.count = executing->Wait.count; |
---|
150 | the_proxy->Wait.return_argument = executing->Wait.return_argument; |
---|
151 | the_proxy->Wait.return_argument_second = executing->Wait.return_argument_second; |
---|
152 | the_proxy->Wait.option = executing->Wait.option; |
---|
153 | the_proxy->Wait.return_code = executing->Wait.return_code; |
---|
154 | |
---|
155 | the_proxy->thread_queue_callout = _Thread_queue_MP_callout_do_nothing; |
---|
156 | |
---|
157 | _RBTree_Insert_inline( |
---|
158 | &_Thread_MP_Active_proxies, |
---|
159 | &the_proxy->Active, |
---|
160 | &source_tid, |
---|
161 | _Thread_MP_Proxy_less |
---|
162 | ); |
---|
163 | |
---|
164 | _Thread_MP_Proxies_release( &lock_context ); |
---|
165 | |
---|
166 | return (Thread_Control *) the_proxy; |
---|
167 | } |
---|
168 | |
---|
169 | _Thread_MP_Proxies_release( &lock_context ); |
---|
170 | |
---|
171 | _Internal_error( INTERNAL_ERROR_OUT_OF_PROXIES ); |
---|
172 | |
---|
173 | /* |
---|
174 | * NOTE: The following return ensures that the compiler will |
---|
175 | * think that all paths return a value. |
---|
176 | */ |
---|
177 | |
---|
178 | return NULL; |
---|
179 | } |
---|
180 | |
---|
181 | Thread_Control *_Thread_MP_Find_proxy ( |
---|
182 | Objects_Id the_id |
---|
183 | ) |
---|
184 | { |
---|
185 | Thread_Proxy_control *the_proxy; |
---|
186 | ISR_lock_Context lock_context; |
---|
187 | |
---|
188 | _Thread_MP_Proxies_acquire( &lock_context ); |
---|
189 | |
---|
190 | the_proxy = _RBTree_Find_inline( |
---|
191 | &_Thread_MP_Active_proxies, |
---|
192 | &the_id, |
---|
193 | _Thread_MP_Proxy_equal, |
---|
194 | _Thread_MP_Proxy_less, |
---|
195 | _Thread_MP_Proxy_map |
---|
196 | ); |
---|
197 | |
---|
198 | _Thread_MP_Proxies_release( &lock_context ); |
---|
199 | |
---|
200 | return (Thread_Control *) the_proxy; |
---|
201 | } |
---|
202 | |
---|
203 | void _Thread_MP_Free_proxy( Thread_Control *the_thread ) |
---|
204 | { |
---|
205 | Thread_Proxy_control *the_proxy; |
---|
206 | ISR_lock_Context lock_context; |
---|
207 | |
---|
208 | the_proxy = (Thread_Proxy_control *) the_thread; |
---|
209 | |
---|
210 | _Thread_MP_Proxies_acquire( &lock_context ); |
---|
211 | |
---|
212 | _RBTree_Extract( &_Thread_MP_Active_proxies, &the_proxy->Active ); |
---|
213 | _Chain_Append_unprotected( |
---|
214 | &_Thread_MP_Inactive_proxies, |
---|
215 | &the_proxy->Object.Node |
---|
216 | ); |
---|
217 | |
---|
218 | _Thread_MP_Proxies_release( &lock_context ); |
---|
219 | } |
---|