blob: 5f9af94903b017e0d5bfc3b225dbfb0f0346403a (
plain)
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
|
/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Initialize */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_initialize.h"
#include "tx_thread.h"
#include "tx_timer.h"
/* Define any port-specific scheduling data structures. */
TX_PORT_SPECIFIC_DATA
#ifdef TX_SAFETY_CRITICAL
TX_SAFETY_CRITICAL_EXCEPTION_HANDLER
#endif
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_initialize_kernel_enter PORTABLE C */
/* 6.0 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the first ThreadX function called during */
/* initialization. It is called from the application's "main()" */
/* function. It is important to note that this routine never */
/* returns. The processing of this function is relatively simple: */
/* it calls several ThreadX initialization functions (if needed), */
/* calls the application define function, and then invokes the */
/* scheduler. */
/* */
/* INPUT */
/* */
/* None */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _tx_initialize_low_level Low-level initialization */
/* _tx_initialize_high_level High-level initialization */
/* tx_application_define Application define function */
/* _tx_thread_scheduler ThreadX scheduling loop */
/* */
/* CALLED BY */
/* */
/* main Application main program */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* */
/**************************************************************************/
VOID _tx_initialize_kernel_enter(VOID)
{
/* Determine if the compiler has pre-initialized ThreadX. */
if (_tx_thread_system_state != TX_INITIALIZE_ALMOST_DONE)
{
/* No, the initialization still needs to take place. */
/* Ensure that the system state variable is set to indicate
initialization is in progress. Note that this variable is
later used to represent interrupt nesting. */
_tx_thread_system_state = TX_INITIALIZE_IN_PROGRESS;
/* Call any port specific preprocessing. */
TX_PORT_SPECIFIC_PRE_INITIALIZATION
/* Invoke the low-level initialization to handle all processor specific
initialization issues. */
_tx_initialize_low_level();
/* Invoke the high-level initialization to exercise all of the
ThreadX components and the application's initialization
function. */
_tx_initialize_high_level();
/* Call any port specific post-processing. */
TX_PORT_SPECIFIC_POST_INITIALIZATION
}
/* Optional processing extension. */
TX_INITIALIZE_KERNEL_ENTER_EXTENSION
/* Ensure that the system state variable is set to indicate
initialization is in progress. Note that this variable is
later used to represent interrupt nesting. */
_tx_thread_system_state = TX_INITIALIZE_IN_PROGRESS;
/* Call the application provided initialization function. Pass the
first available memory address to it. */
tx_application_define(_tx_initialize_unused_memory);
/* Set the system state in preparation for entering the thread
scheduler. */
_tx_thread_system_state = TX_INITIALIZE_IS_FINISHED;
/* Call any port specific pre-scheduler processing. */
TX_PORT_SPECIFIC_PRE_SCHEDULER_INITIALIZATION
/* Enter the scheduling loop to start executing threads! */
_tx_thread_schedule();
#ifdef TX_SAFETY_CRITICAL
/* If we ever get here, raise safety critical exception. */
TX_SAFETY_CRITICAL_EXCEPTION(__FILE__, __LINE__, 0);
#endif
}
|
