2 * FreeRTOS Kernel V10.3.0
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3 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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6 * this software and associated documentation files (the "Software"), to deal in
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7 * the Software without restriction, including without limitation the rights to
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8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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9 * the Software, and to permit persons to whom the Software is furnished to do so,
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10 * subject to the following conditions:
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12 * The above copyright notice and this permission notice shall be included in all
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13 * copies or substantial portions of the Software.
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 * http://www.FreeRTOS.org
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23 * http://aws.amazon.com/freertos
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25 * 1 tab == 4 spaces!
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29 * Purpose: Lowest level routines for all ColdFire processors.
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33 * ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale
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34 * supplied source files.
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37 .global ulPortSetIPL
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38 .global _ulPortSetIPL
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39 .global mcf5xxx_wr_cacrx
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40 .global _mcf5xxx_wr_cacrx
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41 .global vPortYieldISR
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42 .global _vPortYieldISR
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43 .global vPortStartFirstTask
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44 .global _vPortStartFirstTask
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45 .extern _pxCurrentTCB
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46 .extern _vPortYieldHandler
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50 .macro portSAVE_CONTEXT
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54 move.l _pxCurrentTCB, a0
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59 .macro portRESTORE_CONTEXT
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61 move.l _pxCurrentTCB, a0
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69 /********************************************************************/
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71 * This routines changes the IPL to the value passed into the routine.
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72 * It also returns the old IPL value back.
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73 * Calling convention from C:
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74 * old_ipl = asm_set_ipl(new_ipl);
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75 * For the Diab Data C compiler, it passes return value thru D0.
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76 * Note that only the least significant three bits of the passed
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85 move.w SR,D7 /* current sr */
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87 move.l D7,D0 /* prepare return value */
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88 andi.l #0x0700,D0 /* mask out IPL */
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89 lsr.l #8,D0 /* IPL */
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91 move.l 8(A6),D6 /* get argument */
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92 andi.l #0x07,D6 /* least significant three bits */
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93 lsl.l #8,D6 /* move over to make mask */
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95 andi.l #0x0000F8FF,D7 /* zero out current IPL */
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96 or.l D6,D7 /* place new IPL in sr */
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103 /********************************************************************/
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108 .long 0x4e7b0002 /* movec d0,cacr */
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112 /********************************************************************/
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114 /* Yield interrupt. */
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118 jsr _vPortYieldHandler
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119 portRESTORE_CONTEXT
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121 /********************************************************************/
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124 vPortStartFirstTask:
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125 _vPortStartFirstTask:
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126 portRESTORE_CONTEXT
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