1 | /* |
---|
2 | * COPYRIGHT (c) 1989-2009. |
---|
3 | * On-Line Applications Research Corporation (OAR). |
---|
4 | * |
---|
5 | * The license and distribution terms for this file may be |
---|
6 | * found in the file LICENSE in this distribution or at |
---|
7 | * http://www.rtems.com/license/LICENSE. |
---|
8 | * |
---|
9 | * $Id$ |
---|
10 | */ |
---|
11 | |
---|
12 | /* |
---|
13 | * WARNING!!!!!!!!! |
---|
14 | * |
---|
15 | * THIS TEST USES INTERNAL RTEMS VARIABLES!!! |
---|
16 | */ |
---|
17 | |
---|
18 | #define CONFIGURE_INIT |
---|
19 | #include "system.h" |
---|
20 | |
---|
21 | #include <bsp.h> |
---|
22 | |
---|
23 | #define _RTEMS_TMTEST27 |
---|
24 | #include <tm27.h> |
---|
25 | |
---|
26 | rtems_task Task_1( |
---|
27 | rtems_task_argument argument |
---|
28 | ); |
---|
29 | |
---|
30 | rtems_task Task_2( |
---|
31 | rtems_task_argument argument |
---|
32 | ); |
---|
33 | |
---|
34 | volatile uint32_t Interrupt_occurred; |
---|
35 | volatile uint32_t Interrupt_enter_time, Interrupt_enter_nested_time; |
---|
36 | volatile uint32_t Interrupt_return_time, Interrupt_return_nested_time; |
---|
37 | uint32_t Interrupt_nest; |
---|
38 | uint32_t timer_overhead; |
---|
39 | |
---|
40 | rtems_isr Isr_handler( |
---|
41 | rtems_vector_number vector |
---|
42 | ); |
---|
43 | |
---|
44 | rtems_task Init( |
---|
45 | rtems_task_argument argument |
---|
46 | ) |
---|
47 | { |
---|
48 | rtems_status_code status; |
---|
49 | |
---|
50 | Print_Warning(); |
---|
51 | |
---|
52 | puts( "\n\n*** TIME TEST 27 ***" ); |
---|
53 | |
---|
54 | #define LOW_PRIORITY (RTEMS_MAXIMUM_PRIORITY - 1u) |
---|
55 | status = rtems_task_create( |
---|
56 | rtems_build_name( 'T', 'A', '1', ' ' ), |
---|
57 | LOW_PRIORITY, |
---|
58 | RTEMS_MINIMUM_STACK_SIZE, |
---|
59 | RTEMS_DEFAULT_MODES, |
---|
60 | RTEMS_DEFAULT_ATTRIBUTES, |
---|
61 | &Task_id[ 1 ] |
---|
62 | ); |
---|
63 | directive_failed( status, "rtems_task_create Task_1" ); |
---|
64 | |
---|
65 | status = rtems_task_start( Task_id[ 1 ], Task_1, 0 ); |
---|
66 | directive_failed( status, "rtems_task_start Task_1" ); |
---|
67 | |
---|
68 | status = rtems_task_create( |
---|
69 | rtems_build_name( 'T', 'A', '2', ' ' ), |
---|
70 | LOW_PRIORITY, |
---|
71 | RTEMS_MINIMUM_STACK_SIZE, |
---|
72 | RTEMS_DEFAULT_MODES, |
---|
73 | RTEMS_DEFAULT_ATTRIBUTES, |
---|
74 | &Task_id[ 2 ] |
---|
75 | ); |
---|
76 | directive_failed( status, "rtems_task_create of Task_2" ); |
---|
77 | |
---|
78 | status = rtems_task_start( Task_id[ 2 ], Task_2, 0 ); |
---|
79 | directive_failed( status, "rtems_task_start of Task_2" ); |
---|
80 | |
---|
81 | benchmark_timer_initialize(); |
---|
82 | benchmark_timer_read(); |
---|
83 | benchmark_timer_initialize(); |
---|
84 | timer_overhead = benchmark_timer_read(); |
---|
85 | |
---|
86 | status = rtems_task_delete( RTEMS_SELF ); |
---|
87 | directive_failed( status, "rtems_task_delete of RTEMS_SELF" ); |
---|
88 | } |
---|
89 | |
---|
90 | rtems_task Task_1( |
---|
91 | rtems_task_argument argument |
---|
92 | ) |
---|
93 | { |
---|
94 | Install_tm27_vector( Isr_handler ); |
---|
95 | |
---|
96 | /* |
---|
97 | * No preempt .. no nesting |
---|
98 | */ |
---|
99 | |
---|
100 | Interrupt_nest = 0; |
---|
101 | |
---|
102 | _Thread_Dispatch_disable_level = 0; |
---|
103 | |
---|
104 | Interrupt_occurred = 0; |
---|
105 | |
---|
106 | benchmark_timer_initialize(); |
---|
107 | Cause_tm27_intr(); |
---|
108 | /* goes to Isr_handler */ |
---|
109 | |
---|
110 | #if (MUST_WAIT_FOR_INTERRUPT == 1) |
---|
111 | while ( Interrupt_occurred == 0 ); |
---|
112 | #endif |
---|
113 | Interrupt_return_time = benchmark_timer_read(); |
---|
114 | |
---|
115 | put_time( |
---|
116 | "interrupt entry overhead: returns to interrupted task", |
---|
117 | Interrupt_enter_time, |
---|
118 | 1, |
---|
119 | 0, |
---|
120 | timer_overhead |
---|
121 | ); |
---|
122 | |
---|
123 | put_time( |
---|
124 | "interrupt exit overhead: returns to interrupted task", |
---|
125 | Interrupt_return_time, |
---|
126 | 1, |
---|
127 | 0, |
---|
128 | timer_overhead |
---|
129 | ); |
---|
130 | |
---|
131 | /* |
---|
132 | * No preempt .. nested |
---|
133 | */ |
---|
134 | |
---|
135 | _Thread_Dispatch_disable_level = 1; |
---|
136 | |
---|
137 | Interrupt_nest = 1; |
---|
138 | |
---|
139 | Interrupt_occurred = 0; |
---|
140 | benchmark_timer_initialize(); |
---|
141 | Cause_tm27_intr(); |
---|
142 | /* goes to Isr_handler */ |
---|
143 | |
---|
144 | #if (MUST_WAIT_FOR_INTERRUPT == 1) |
---|
145 | while ( Interrupt_occurred == 0 ); |
---|
146 | #endif |
---|
147 | Interrupt_return_time = benchmark_timer_read(); |
---|
148 | |
---|
149 | _Thread_Dispatch_disable_level = 0; |
---|
150 | |
---|
151 | put_time( |
---|
152 | "interrupt entry overhead: returns to nested interrupt", |
---|
153 | Interrupt_enter_nested_time, |
---|
154 | 1, |
---|
155 | 0, |
---|
156 | 0 |
---|
157 | ); |
---|
158 | |
---|
159 | put_time( |
---|
160 | "interrupt exit overhead: returns to nested interrupt", |
---|
161 | Interrupt_return_nested_time, |
---|
162 | 1, |
---|
163 | 0, |
---|
164 | 0 |
---|
165 | ); |
---|
166 | |
---|
167 | /* |
---|
168 | * Does a preempt .. not nested |
---|
169 | */ |
---|
170 | |
---|
171 | _Thread_Dispatch_disable_level = 0; |
---|
172 | |
---|
173 | _Thread_Heir = (rtems_tcb *) _Thread_Ready_chain[LOW_PRIORITY].last; |
---|
174 | |
---|
175 | _Thread_Dispatch_necessary = 1; |
---|
176 | |
---|
177 | Interrupt_occurred = 0; |
---|
178 | benchmark_timer_initialize(); |
---|
179 | Cause_tm27_intr(); |
---|
180 | |
---|
181 | /* |
---|
182 | * goes to Isr_handler and then returns |
---|
183 | */ |
---|
184 | |
---|
185 | puts( "*** END OF TEST 27 ***" ); |
---|
186 | rtems_test_exit( 0 ); |
---|
187 | } |
---|
188 | |
---|
189 | /* |
---|
190 | * NOTE: When this task is executing, some of the assumptions made |
---|
191 | * regarding the placement of the currently executing task's TCB |
---|
192 | * on the ready chains have been violated. At least the assumption |
---|
193 | * that this task is at the head of the chain for its priority |
---|
194 | * has been violated. |
---|
195 | */ |
---|
196 | |
---|
197 | rtems_task Task_2( |
---|
198 | rtems_task_argument argument |
---|
199 | ) |
---|
200 | { |
---|
201 | #if (MUST_WAIT_FOR_INTERRUPT == 1) |
---|
202 | while ( Interrupt_occurred == 0 ); |
---|
203 | #endif |
---|
204 | end_time = benchmark_timer_read(); |
---|
205 | |
---|
206 | put_time( |
---|
207 | "interrupt entry overhead: returns to preempting task", |
---|
208 | Interrupt_enter_time, |
---|
209 | 1, |
---|
210 | 0, |
---|
211 | timer_overhead |
---|
212 | ); |
---|
213 | |
---|
214 | put_time( |
---|
215 | "interrupt exit overhead: returns to preempting task", |
---|
216 | end_time, |
---|
217 | 1, |
---|
218 | 0, |
---|
219 | 0 |
---|
220 | ); |
---|
221 | |
---|
222 | fflush( stdout ); |
---|
223 | |
---|
224 | /* |
---|
225 | * Switch back to the other task to exit the test. |
---|
226 | */ |
---|
227 | |
---|
228 | _Thread_Dispatch_disable_level = 0; |
---|
229 | |
---|
230 | _Thread_Heir = (rtems_tcb *) _Thread_Ready_chain[LOW_PRIORITY].first; |
---|
231 | |
---|
232 | _Thread_Dispatch_necessary = 1; |
---|
233 | |
---|
234 | _Thread_Dispatch(); |
---|
235 | |
---|
236 | } |
---|
237 | |
---|
238 | /* The Isr_handler() and Isr_handler_inner() routines are structured |
---|
239 | * so that there will be as little entry overhead as possible included |
---|
240 | * in the interrupt entry time. |
---|
241 | */ |
---|
242 | |
---|
243 | void Isr_handler_inner( void ); |
---|
244 | |
---|
245 | rtems_isr Isr_handler( |
---|
246 | rtems_vector_number vector |
---|
247 | ) |
---|
248 | { |
---|
249 | end_time = benchmark_timer_read(); |
---|
250 | |
---|
251 | Interrupt_occurred = 1; |
---|
252 | Isr_handler_inner(); |
---|
253 | } |
---|
254 | |
---|
255 | void Isr_handler_inner( void ) |
---|
256 | { |
---|
257 | |
---|
258 | /*enable_tracing();*/ |
---|
259 | Clear_tm27_intr(); |
---|
260 | switch ( Interrupt_nest ) { |
---|
261 | case 0: |
---|
262 | Interrupt_enter_time = end_time; |
---|
263 | break; |
---|
264 | case 1: |
---|
265 | Interrupt_enter_time = end_time; |
---|
266 | Interrupt_nest = 2; |
---|
267 | Interrupt_occurred = 0; |
---|
268 | Lower_tm27_intr(); |
---|
269 | benchmark_timer_initialize(); |
---|
270 | Cause_tm27_intr(); |
---|
271 | /* goes to a nested copy of Isr_handler */ |
---|
272 | #if (MUST_WAIT_FOR_INTERRUPT == 1) |
---|
273 | while ( Interrupt_occurred == 0 ); |
---|
274 | #endif |
---|
275 | Interrupt_return_nested_time = benchmark_timer_read(); |
---|
276 | break; |
---|
277 | case 2: |
---|
278 | Interrupt_enter_nested_time = end_time; |
---|
279 | break; |
---|
280 | } |
---|
281 | |
---|
282 | benchmark_timer_initialize(); |
---|
283 | } |
---|