2 FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd.
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5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 This file is part of the FreeRTOS distribution.
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9 FreeRTOS is free software; you can redistribute it and/or modify it under
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10 the terms of the GNU General Public License (version 2) as published by the
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11 Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
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13 ***************************************************************************
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14 >>! NOTE: The modification to the GPL is included to allow you to !<<
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15 >>! distribute a combined work that includes FreeRTOS without being !<<
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16 >>! obliged to provide the source code for proprietary components !<<
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17 >>! outside of the FreeRTOS kernel. !<<
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18 ***************************************************************************
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20 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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21 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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22 FOR A PARTICULAR PURPOSE. Full license text is available on the following
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23 link: http://www.freertos.org/a00114.html
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25 ***************************************************************************
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27 * FreeRTOS provides completely free yet professionally developed, *
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28 * robust, strictly quality controlled, supported, and cross *
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29 * platform software that is more than just the market leader, it *
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30 * is the industry's de facto standard. *
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32 * Help yourself get started quickly while simultaneously helping *
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33 * to support the FreeRTOS project by purchasing a FreeRTOS *
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34 * tutorial book, reference manual, or both: *
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35 * http://www.FreeRTOS.org/Documentation *
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37 ***************************************************************************
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39 http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
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40 the FAQ page "My application does not run, what could be wrong?". Have you
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41 defined configASSERT()?
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43 http://www.FreeRTOS.org/support - In return for receiving this top quality
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44 embedded software for free we request you assist our global community by
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45 participating in the support forum.
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47 http://www.FreeRTOS.org/training - Investing in training allows your team to
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48 be as productive as possible as early as possible. Now you can receive
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49 FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
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50 Ltd, and the world's leading authority on the world's leading RTOS.
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52 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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53 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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54 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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56 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
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57 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
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59 http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
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60 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
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61 licenses offer ticketed support, indemnification and commercial middleware.
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63 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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64 engineered and independently SIL3 certified version for use in safety and
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65 mission critical applications that require provable dependability.
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71 * Purpose: Lowest level routines for all ColdFire processors.
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75 * ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale
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76 * supplied source files.
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79 .global ulPortSetIPL
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80 .global mcf5xxx_wr_cacr
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81 .global __cs3_isr_interrupt_80
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82 .global vPortStartFirstTask
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86 .macro portSAVE_CONTEXT
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88 lea.l (-60, %sp), %sp
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89 movem.l %d0-%fp, (%sp)
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90 move.l pxCurrentTCB, %a0
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95 .macro portRESTORE_CONTEXT
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97 move.l pxCurrentTCB, %a0
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99 movem.l (%sp), %d0-%fp
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100 lea.l %sp@(60), %sp
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105 /********************************************************************/
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107 * This routines changes the IPL to the value passed into the routine.
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108 * It also returns the old IPL value back.
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109 * Calling convention from C:
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110 * old_ipl = asm_set_ipl(new_ipl);
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111 * For the Diab Data C compiler, it passes return value thru D0.
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112 * Note that only the least significant three bits of the passed
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120 move.w SR,D7 /* current sr */
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122 move.l D7,D0 /* prepare return value */
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123 andi.l #0x0700,D0 /* mask out IPL */
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124 lsr.l #8,D0 /* IPL */
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126 move.l 8(A6),D6 /* get argument */
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127 andi.l #0x07,D6 /* least significant three bits */
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128 lsl.l #8,D6 /* move over to make mask */
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130 andi.l #0x0000F8FF,D7 /* zero out current IPL */
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131 or.l D6,D7 /* place new IPL in sr */
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138 /********************************************************************/
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142 .long 0x4e7b0002 /* movec d0,cacr */
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146 /********************************************************************/
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148 /* Yield interrupt. */
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149 __cs3_isr_interrupt_80:
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151 jsr vPortYieldHandler
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152 portRESTORE_CONTEXT
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154 /********************************************************************/
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157 vPortStartFirstTask:
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158 portRESTORE_CONTEXT
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