/* | |
FreeRTOS V8.0.1 - 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. | |
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*/ | |
/*----------------------------------------------------------- | |
* Implementation of functions defined in portable.h for the SH2A port. | |
*----------------------------------------------------------*/ | |
/* Scheduler includes. */ | |
#include "FreeRTOS.h" | |
#include "task.h" | |
/* Library includes. */ | |
#include "string.h" | |
/* Hardware specifics. */ | |
#include <iorx62n.h> | |
/*-----------------------------------------------------------*/ | |
/* Tasks should start with interrupts enabled and in Supervisor mode, therefore | |
PSW is set with U and I set, and PM and IPL clear. */ | |
#define portINITIAL_PSW ( ( StackType_t ) 0x00030000 ) | |
#define portINITIAL_FPSW ( ( StackType_t ) 0x00000100 ) | |
/*-----------------------------------------------------------*/ | |
/* | |
* Function to start the first task executing - written in asm code as direct | |
* access to registers is required. | |
*/ | |
extern void prvStartFirstTask( void ); | |
/* | |
* The tick ISR handler. The peripheral used is configured by the application | |
* via a hook/callback function. | |
*/ | |
__interrupt void vTickISR( void ); | |
/*-----------------------------------------------------------*/ | |
extern void *pxCurrentTCB; | |
/*-----------------------------------------------------------*/ | |
/* | |
* See header file for description. | |
*/ | |
StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters ) | |
{ | |
/* R0 is not included as it is the stack pointer. */ | |
*pxTopOfStack = 0x00; | |
pxTopOfStack--; | |
*pxTopOfStack = portINITIAL_PSW; | |
pxTopOfStack--; | |
*pxTopOfStack = ( StackType_t ) pxCode; | |
/* When debugging it can be useful if every register is set to a known | |
value. Otherwise code space can be saved by just setting the registers | |
that need to be set. */ | |
#ifdef USE_FULL_REGISTER_INITIALISATION | |
{ | |
pxTopOfStack--; | |
*pxTopOfStack = 0xffffffff; /* r15. */ | |
pxTopOfStack--; | |
*pxTopOfStack = 0xeeeeeeee; | |
pxTopOfStack--; | |
*pxTopOfStack = 0xdddddddd; | |
pxTopOfStack--; | |
*pxTopOfStack = 0xcccccccc; | |
pxTopOfStack--; | |
*pxTopOfStack = 0xbbbbbbbb; | |
pxTopOfStack--; | |
*pxTopOfStack = 0xaaaaaaaa; | |
pxTopOfStack--; | |
*pxTopOfStack = 0x99999999; | |
pxTopOfStack--; | |
*pxTopOfStack = 0x88888888; | |
pxTopOfStack--; | |
*pxTopOfStack = 0x77777777; | |
pxTopOfStack--; | |
*pxTopOfStack = 0x66666666; | |
pxTopOfStack--; | |
*pxTopOfStack = 0x55555555; | |
pxTopOfStack--; | |
*pxTopOfStack = 0x44444444; | |
pxTopOfStack--; | |
*pxTopOfStack = 0x33333333; | |
pxTopOfStack--; | |
*pxTopOfStack = 0x22222222; | |
pxTopOfStack--; | |
} | |
#else | |
{ | |
pxTopOfStack -= 15; | |
} | |
#endif | |
*pxTopOfStack = ( StackType_t ) pvParameters; /* R1 */ | |
pxTopOfStack--; | |
*pxTopOfStack = portINITIAL_FPSW; | |
pxTopOfStack--; | |
*pxTopOfStack = 0x12345678; /* Accumulator. */ | |
pxTopOfStack--; | |
*pxTopOfStack = 0x87654321; /* Accumulator. */ | |
return pxTopOfStack; | |
} | |
/*-----------------------------------------------------------*/ | |
BaseType_t xPortStartScheduler( void ) | |
{ | |
extern void vApplicationSetupTimerInterrupt( void ); | |
/* Use pxCurrentTCB just so it does not get optimised away. */ | |
if( pxCurrentTCB != NULL ) | |
{ | |
/* Call an application function to set up the timer that will generate the | |
tick interrupt. This way the application can decide which peripheral to | |
use. A demo application is provided to show a suitable example. */ | |
vApplicationSetupTimerInterrupt(); | |
/* Enable the software interrupt. */ | |
_IEN( _ICU_SWINT ) = 1; | |
/* Ensure the software interrupt is clear. */ | |
_IR( _ICU_SWINT ) = 0; | |
/* Ensure the software interrupt is set to the kernel priority. */ | |
_IPR( _ICU_SWINT ) = configKERNEL_INTERRUPT_PRIORITY; | |
/* Start the first task. */ | |
prvStartFirstTask(); | |
} | |
/* Should not get here. */ | |
return pdFAIL; | |
} | |
/*-----------------------------------------------------------*/ | |
#pragma vector = configTICK_VECTOR | |
__interrupt void vTickISR( void ) | |
{ | |
/* Re-enable interrupts. */ | |
__enable_interrupt(); | |
/* Increment the tick, and perform any processing the new tick value | |
necessitates. */ | |
__set_interrupt_level( configMAX_SYSCALL_INTERRUPT_PRIORITY ); | |
{ | |
if( xTaskIncrementTick() != pdFALSE ) | |
{ | |
taskYIELD(); | |
} | |
} | |
__set_interrupt_level( configKERNEL_INTERRUPT_PRIORITY ); | |
} | |
/*-----------------------------------------------------------*/ | |
void vPortEndScheduler( void ) | |
{ | |
/* Not implemented in ports where there is nothing to return to. | |
Artificially force an assert. */ | |
configASSERT( pxCurrentTCB == NULL ); | |
} | |
/*-----------------------------------------------------------*/ | |