mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-04-20 21:41:59 -04:00
159 lines
5.6 KiB
ArmAsm
159 lines
5.6 KiB
ArmAsm
/*
|
|
FreeRTOS V8.0.0 - Copyright (C) 2014 Real Time Engineers Ltd.
|
|
All rights reserved
|
|
|
|
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
|
|
|
|
***************************************************************************
|
|
* *
|
|
* FreeRTOS provides completely free yet professionally developed, *
|
|
* robust, strictly quality controlled, supported, and cross *
|
|
* platform software that has become a de facto standard. *
|
|
* *
|
|
* Help yourself get started quickly and support the FreeRTOS *
|
|
* project by purchasing a FreeRTOS tutorial book, reference *
|
|
* manual, or both from: http://www.FreeRTOS.org/Documentation *
|
|
* *
|
|
* Thank you! *
|
|
* *
|
|
***************************************************************************
|
|
|
|
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 from the following
|
|
link: http://www.freertos.org/a00114.html
|
|
|
|
1 tab == 4 spaces!
|
|
|
|
***************************************************************************
|
|
* *
|
|
* Having a problem? Start by reading the FAQ "My application does *
|
|
* not run, what could be wrong?" *
|
|
* *
|
|
* http://www.FreeRTOS.org/FAQHelp.html *
|
|
* *
|
|
***************************************************************************
|
|
|
|
http://www.FreeRTOS.org - Documentation, books, training, latest versions,
|
|
license and Real Time Engineers Ltd. contact details.
|
|
|
|
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.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
|
|
Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
|
|
licenses offer ticketed support, indemnification and 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 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
|
|
|
|
|