2 FreeRTOS V7.5.2 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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6 ***************************************************************************
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8 * FreeRTOS provides completely free yet professionally developed, *
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9 * robust, strictly quality controlled, supported, and cross *
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10 * platform software that has become a de facto standard. *
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12 * Help yourself get started quickly and support the FreeRTOS *
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13 * project by purchasing a FreeRTOS tutorial book, reference *
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14 * manual, or both from: http://www.FreeRTOS.org/Documentation *
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18 ***************************************************************************
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20 This file is part of the FreeRTOS distribution.
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22 FreeRTOS is free software; you can redistribute it and/or modify it under
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23 the terms of the GNU General Public License (version 2) as published by the
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24 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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26 >>! NOTE: The modification to the GPL is included to allow you to distribute
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27 >>! a combined work that includes FreeRTOS without being obliged to provide
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28 >>! the source code for proprietary components outside of the FreeRTOS
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31 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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32 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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33 FOR A PARTICULAR PURPOSE. Full license text is available from the following
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34 link: http://www.freertos.org/a00114.html
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38 ***************************************************************************
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40 * Having a problem? Start by reading the FAQ "My application does *
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41 * not run, what could be wrong?" *
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43 * http://www.FreeRTOS.org/FAQHelp.html *
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45 ***************************************************************************
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47 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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48 license and Real Time Engineers Ltd. contact details.
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50 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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51 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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52 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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54 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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55 Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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56 licenses offer ticketed support, indemnification and middleware.
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58 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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59 engineered and independently SIL3 certified version for use in safety and
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60 mission critical applications that require provable dependability.
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66 * Purpose: Lowest level routines for all ColdFire processors.
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70 * ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale
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71 * supplied source files.
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74 .global ulPortSetIPL
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75 .global mcf5xxx_wr_cacr
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76 .global __cs3_isr_interrupt_80
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77 .global vPortStartFirstTask
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81 .macro portSAVE_CONTEXT
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83 lea.l (-60, %sp), %sp
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84 movem.l %d0-%fp, (%sp)
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85 move.l pxCurrentTCB, %a0
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90 .macro portRESTORE_CONTEXT
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92 move.l pxCurrentTCB, %a0
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94 movem.l (%sp), %d0-%fp
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100 /********************************************************************/
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102 * This routines changes the IPL to the value passed into the routine.
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103 * It also returns the old IPL value back.
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104 * Calling convention from C:
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105 * old_ipl = asm_set_ipl(new_ipl);
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106 * For the Diab Data C compiler, it passes return value thru D0.
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107 * Note that only the least significant three bits of the passed
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115 move.w SR,D7 /* current sr */
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117 move.l D7,D0 /* prepare return value */
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118 andi.l #0x0700,D0 /* mask out IPL */
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119 lsr.l #8,D0 /* IPL */
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121 move.l 8(A6),D6 /* get argument */
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122 andi.l #0x07,D6 /* least significant three bits */
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123 lsl.l #8,D6 /* move over to make mask */
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125 andi.l #0x0000F8FF,D7 /* zero out current IPL */
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126 or.l D6,D7 /* place new IPL in sr */
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133 /********************************************************************/
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137 .long 0x4e7b0002 /* movec d0,cacr */
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141 /********************************************************************/
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143 /* Yield interrupt. */
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144 __cs3_isr_interrupt_80:
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146 jsr vPortYieldHandler
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147 portRESTORE_CONTEXT
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149 /********************************************************************/
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152 vPortStartFirstTask:
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153 portRESTORE_CONTEXT
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