1 | /** |
---|
2 | * @file |
---|
3 | * RTEMS SMP Support for Scheduler Simulator |
---|
4 | */ |
---|
5 | |
---|
6 | /* |
---|
7 | * COPYRIGHT (c) 1989-2014. |
---|
8 | * On-Line Applications Research Corporation (OAR). |
---|
9 | * |
---|
10 | * The license and distribution terms for this file may be |
---|
11 | * found in the file LICENSE in this distribution or at |
---|
12 | * http://www.rtems.com/license/LICENSE. |
---|
13 | */ |
---|
14 | |
---|
15 | #include <rtems.h> |
---|
16 | #include <rtems/bspIo.h> |
---|
17 | #include <stdlib.h> |
---|
18 | |
---|
19 | /* |
---|
20 | * Actually owned by the _Thread_Dispatch() wrapper. |
---|
21 | * This way the variable is available all the time. |
---|
22 | */ |
---|
23 | extern uint32_t Schedsim_Current_cpu; |
---|
24 | |
---|
25 | #if RTEMS_SMP |
---|
26 | extern uint32_t Schedsim_Maximum_CPUs_From_Command_Line; |
---|
27 | #endif |
---|
28 | |
---|
29 | uint32_t _CPU_SMP_Initialize( void ) |
---|
30 | { |
---|
31 | #if RTEMS_SMP |
---|
32 | /* return the number of CPUs */ |
---|
33 | return Schedsim_Maximum_CPUs_From_Command_Line; |
---|
34 | #else |
---|
35 | return 1; |
---|
36 | #endif |
---|
37 | } |
---|
38 | |
---|
39 | bool _CPU_SMP_Start_processor( uint32_t cpu_index ) |
---|
40 | { |
---|
41 | return true; |
---|
42 | } |
---|
43 | |
---|
44 | void _CPU_SMP_Finalize_initialization( uint32_t cpu_count ) |
---|
45 | { |
---|
46 | } |
---|
47 | |
---|
48 | void _CPU_SMP_Send_interrupt( uint32_t target_processor_index ) |
---|
49 | { |
---|
50 | } |
---|
51 | |
---|
52 | void _CPU_SMP_Processor_event_broadcast( void ) |
---|
53 | { |
---|
54 | #if RTEMS_SMP |
---|
55 | Per_CPU_Control *cpu = _Per_CPU_Get(); |
---|
56 | uint32_t cpu_count = _SMP_Get_processor_count(); |
---|
57 | uint32_t cpu_index; |
---|
58 | Per_CPU_State state = cpu->state; |
---|
59 | |
---|
60 | if (state == PER_CPU_STATE_REQUEST_START_MULTITASKING) { |
---|
61 | for ( cpu_index = 0 ; cpu_index < cpu_count ; ++cpu_index ) { |
---|
62 | cpu = _Per_CPU_Get_by_index( cpu_index ); |
---|
63 | state = cpu->state; |
---|
64 | if (state == PER_CPU_STATE_INITIAL ) |
---|
65 | cpu->state = PER_CPU_STATE_READY_TO_START_MULTITASKING; |
---|
66 | } |
---|
67 | } |
---|
68 | #endif |
---|
69 | } |
---|
70 | |
---|
71 | |
---|
72 | void _CPU_SMP_Processor_event_receive( void ) |
---|
73 | { |
---|
74 | } |
---|
75 | |
---|
76 | uint32_t _CPU_SMP_Get_current_processor( void ) |
---|
77 | { |
---|
78 | #if RTEMS_SMP |
---|
79 | return Schedsim_Current_cpu; |
---|
80 | #else |
---|
81 | return 0; |
---|
82 | #endif |
---|
83 | } |
---|