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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/*
FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
All rights reserved
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
***************************************************************************
>>! NOTE: The modification to the GPL is included to allow you to !<<
>>! distribute a combined work that includes FreeRTOS without being !<<
>>! obliged to provide the source code for proprietary components !<<
>>! outside of the FreeRTOS kernel. !<<
***************************************************************************
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. Full license text is available on the following
link: http://www.freertos.org/a00114.html
***************************************************************************
* *
* FreeRTOS provides completely free yet professionally developed, *
* robust, strictly quality controlled, supported, and cross *
* platform software that is more than just the market leader, it *
* is the industry's de facto standard. *
* *
* Help yourself get started quickly while simultaneously helping *
* to support the FreeRTOS project by purchasing a FreeRTOS *
* tutorial book, reference manual, or both: *
* http://www.FreeRTOS.org/Documentation *
* *
***************************************************************************
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
the FAQ page "My application does not run, what could be wrong?". Have you
defined configASSERT()?
http://www.FreeRTOS.org/support - In return for receiving this top quality
embedded software for free we request you assist our global community by
participating in the support forum.
http://www.FreeRTOS.org/training - Investing in training allows your team to
be as productive as possible as early as possible. Now you can receive
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
Ltd, and the world's leading authority on the world's leading RTOS.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
compatible FAT file system, and our tiny thread aware UDP/IP stack.
http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
licenses offer ticketed support, indemnification and commercial middleware.
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
engineered and independently SIL3 certified version for use in safety and
mission critical applications that require provable dependability.
1 tab == 4 spaces!
*/
/*
* Purpose: Lowest level routines for all ColdFire processors.
*
* Notes:
*
* ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale
* supplied source files.
*/
.global ulPortSetIPL
.global _ulPortSetIPL
.global mcf5xxx_wr_cacrx
.global _mcf5xxx_wr_cacrx
.global vPortYieldISR
.global _vPortYieldISR
.global vPortStartFirstTask
.global _vPortStartFirstTask
.extern _pxCurrentTCB
.extern _vPortYieldHandler
.text
.macro portSAVE_CONTEXT
lea.l (-60, sp), sp
movem.l d0-a6, (sp)
move.l _pxCurrentTCB, a0
move.l sp, (a0)
.endm
.macro portRESTORE_CONTEXT
move.l _pxCurrentTCB, a0
move.l (a0), sp
movem.l (sp), d0-a6
lea.l (60, sp), sp
rte
.endm
/********************************************************************/
/*
* This routines changes the IPL to the value passed into the routine.
* It also returns the old IPL value back.
* Calling convention from C:
* old_ipl = asm_set_ipl(new_ipl);
* For the Diab Data C compiler, it passes return value thru D0.
* Note that only the least significant three bits of the passed
* value are used.
*/
ulPortSetIPL:
_ulPortSetIPL:
link A6,#-8
movem.l D6-D7,(SP)
move.w SR,D7 /* current sr */
move.l D7,D6 /* prepare return value */
andi.l #0x0700,D6 /* mask out IPL */
lsr.l #8,D6 /* IPL */
andi.l #0x07,D0 /* least significant three bits */
lsl.l #8,D0 /* move over to make mask */
andi.l #0x0000F8FF,D7 /* zero out current IPL */
or.l D0,D7 /* place new IPL in sr */
move.w D7,SR
move.l D6, D0 /* Return value in D0. */
movem.l (SP),D6-D7
lea 8(SP),SP
unlk A6
rts
/********************************************************************/
mcf5xxx_wr_cacrx:
_mcf5xxx_wr_cacrx:
move.l 4(sp),d0
.long 0x4e7b0002 /* movec d0,cacr */
nop
rts
/********************************************************************/
/* Yield interrupt. */
_vPortYieldISR:
vPortYieldISR:
portSAVE_CONTEXT
jsr _vPortYieldHandler
portRESTORE_CONTEXT
/********************************************************************/
vPortStartFirstTask:
_vPortStartFirstTask:
portRESTORE_CONTEXT
.end
|
