mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-04-22 22:42:00 -04:00
d3e053568d
Add additional NOPs as required by hardware manual. Microblaze: Previously a task inherited the exception enable state from the context from which xTaskCreate() was called. Now tasks all have exceptions enabled if they are enabled in the hardware. Windows/GCC: Improve the implementation of portGET_HIGHEST_PRIORITY. Common code: Simplify the pointer use in xQueueGenericCreate() Demo apps: Remove jpg images that were used to create web pages. Fix capitalisation issues in some demos where some header files are incldued with the wrong case, preventing building on Linux. Remove the Microblaze demos that are using obsolete tools. Update main_blinky for the Windows port demo to include a software timer example.
188 lines
5.8 KiB
NASM
188 lines
5.8 KiB
NASM
;
|
|
;/*
|
|
; FreeRTOS V8.2.1 - Copyright (C) 2015 Real Time Engineers Ltd.
|
|
; All rights reserved
|
|
;
|
|
;
|
|
; ***************************************************************************
|
|
; * *
|
|
; * FreeRTOS tutorial books are available in pdf and paperback. *
|
|
; * Complete, revised, and edited pdf reference manuals are also *
|
|
; * available. *
|
|
; * *
|
|
; * Purchasing FreeRTOS documentation will not only help you, by *
|
|
; * ensuring you get running as quickly as possible and with an *
|
|
; * in-depth knowledge of how to use FreeRTOS, it will also help *
|
|
; * the FreeRTOS project to continue with its mission of providing *
|
|
; * professional grade, cross platform, de facto standard solutions *
|
|
; * for microcontrollers - completely free of charge! *
|
|
; * *
|
|
; * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
|
|
; * *
|
|
; * Thank you for using FreeRTOS, and thank you for your support! *
|
|
; * *
|
|
; ***************************************************************************
|
|
;
|
|
;
|
|
; 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. See the GNU General Public License for
|
|
; more details. You should have received a copy of the GNU General Public
|
|
; License and the FreeRTOS license exception along with FreeRTOS; if not it
|
|
; can be viewed here: http://www.freertos.org/a00114.html and also obtained
|
|
; by writing to Richard Barry, contact details for whom are available on the
|
|
; FreeRTOS WEB site.
|
|
;
|
|
; 1 tab == 4 spaces!
|
|
;
|
|
; http://www.FreeRTOS.org - Documentation, latest information, license and
|
|
; contact details.
|
|
;
|
|
; http://www.SafeRTOS.com - A version that is certified for use in safety
|
|
; critical systems.
|
|
;
|
|
; http://www.OpenRTOS.com - Commercial support, development, porting,
|
|
; licensing and training services.
|
|
;*/
|
|
|
|
; * The definition of the "register test" tasks, as described at the top of
|
|
; * main.c
|
|
|
|
.include data_model.h
|
|
|
|
.global xTaskIncrementTick
|
|
.global vTaskSwitchContext
|
|
.global vPortSetupTimerInterrupt
|
|
.global pxCurrentTCB
|
|
.global usCriticalNesting
|
|
|
|
.def vPortPreemptiveTickISR
|
|
.def vPortCooperativeTickISR
|
|
.def vPortYield
|
|
.def xPortStartScheduler
|
|
|
|
;-----------------------------------------------------------
|
|
|
|
portSAVE_CONTEXT .macro
|
|
|
|
;Save the remaining registers.
|
|
pushm_x #12, r15
|
|
mov.w &usCriticalNesting, r14
|
|
push_x r14
|
|
mov_x &pxCurrentTCB, r12
|
|
mov_x sp, 0( r12 )
|
|
.endm
|
|
;-----------------------------------------------------------
|
|
|
|
portRESTORE_CONTEXT .macro
|
|
|
|
mov_x &pxCurrentTCB, r12
|
|
mov_x @r12, sp
|
|
pop_x r15
|
|
mov.w r15, &usCriticalNesting
|
|
popm_x #12, r15
|
|
nop
|
|
pop.w sr
|
|
nop
|
|
ret_x
|
|
.endm
|
|
;-----------------------------------------------------------
|
|
|
|
;*
|
|
;* The RTOS tick ISR.
|
|
;*
|
|
;* If the cooperative scheduler is in use this simply increments the tick
|
|
;* count.
|
|
;*
|
|
;* If the preemptive scheduler is in use a context switch can also occur.
|
|
;*/
|
|
|
|
.text
|
|
.align 2
|
|
|
|
vPortPreemptiveTickISR: .asmfunc
|
|
|
|
; The sr is not saved in portSAVE_CONTEXT() because vPortYield() needs
|
|
;to save it manually before it gets modified (interrupts get disabled).
|
|
push.w sr
|
|
portSAVE_CONTEXT
|
|
|
|
call_x #xTaskIncrementTick
|
|
call_x #vTaskSwitchContext
|
|
|
|
portRESTORE_CONTEXT
|
|
.endasmfunc
|
|
;-----------------------------------------------------------
|
|
|
|
.align 2
|
|
|
|
vPortCooperativeTickISR: .asmfunc
|
|
|
|
; The sr is not saved in portSAVE_CONTEXT() because vPortYield() needs
|
|
;to save it manually before it gets modified (interrupts get disabled).
|
|
push.w sr
|
|
portSAVE_CONTEXT
|
|
|
|
call_x #xTaskIncrementTick
|
|
|
|
portRESTORE_CONTEXT
|
|
|
|
.endasmfunc
|
|
;-----------------------------------------------------------
|
|
|
|
;
|
|
; Manual context switch called by the portYIELD() macro.
|
|
;
|
|
|
|
.align 2
|
|
|
|
vPortYield: .asmfunc
|
|
|
|
; The sr needs saving before it is modified.
|
|
push.w sr
|
|
|
|
; Now the SR is stacked we can disable interrupts.
|
|
dint
|
|
nop
|
|
|
|
; Save the context of the current task.
|
|
portSAVE_CONTEXT
|
|
|
|
; Select the next task to run.
|
|
call_x #vTaskSwitchContext
|
|
|
|
; Restore the context of the new task.
|
|
portRESTORE_CONTEXT
|
|
.endasmfunc
|
|
;-----------------------------------------------------------
|
|
|
|
|
|
;
|
|
; Start off the scheduler by initialising the RTOS tick timer, then restoring
|
|
; the context of the first task.
|
|
;
|
|
|
|
.align 2
|
|
|
|
xPortStartScheduler: .asmfunc
|
|
|
|
; Setup the hardware to generate the tick. Interrupts are disabled
|
|
; when this function is called.
|
|
call_x #vPortSetupTimerInterrupt
|
|
|
|
; Restore the context of the first task that is going to run.
|
|
portRESTORE_CONTEXT
|
|
.endasmfunc
|
|
;-----------------------------------------------------------
|
|
|
|
.end
|
|
|