/* | |
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, * | |
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* * | |
* Help yourself get started quickly while simultaneously helping * | |
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* http://www.FreeRTOS.org/Documentation * | |
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*************************************************************************** | |
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading | |
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defined configASSERT()? | |
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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 mcf5xxx_wr_cacr | |
.global __cs3_isr_interrupt_80 | |
.global vPortStartFirstTask | |
.text | |
.macro portSAVE_CONTEXT | |
lea.l (-60, %sp), %sp | |
movem.l %d0-%fp, (%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-%fp | |
lea.l %sp@(60), %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: | |
link A6,#-8 | |
movem.l D6-D7,(SP) | |
move.w SR,D7 /* current sr */ | |
move.l D7,D0 /* prepare return value */ | |
andi.l #0x0700,D0 /* mask out IPL */ | |
lsr.l #8,D0 /* IPL */ | |
move.l 8(A6),D6 /* get argument */ | |
andi.l #0x07,D6 /* least significant three bits */ | |
lsl.l #8,D6 /* move over to make mask */ | |
andi.l #0x0000F8FF,D7 /* zero out current IPL */ | |
or.l D6,D7 /* place new IPL in sr */ | |
move.w D7,SR | |
movem.l (SP),D6-D7 | |
lea 8(SP),SP | |
unlk A6 | |
rts | |
/********************************************************************/ | |
mcf5xxx_wr_cacr: | |
move.l 4(sp),d0 | |
.long 0x4e7b0002 /* movec d0,cacr */ | |
nop | |
rts | |
/********************************************************************/ | |
/* Yield interrupt. */ | |
__cs3_isr_interrupt_80: | |
portSAVE_CONTEXT | |
jsr vPortYieldHandler | |
portRESTORE_CONTEXT | |
/********************************************************************/ | |
vPortStartFirstTask: | |
portRESTORE_CONTEXT | |
.end | |