FreeRTOS-RISCV/FreeRTOSv10.2.1/FreeRTOS/Source/portable/IAR/V850ES/port.c

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2019-06-28 23:08:36 +02:00
/*
* FreeRTOS Kernel V10.2.1
* Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* http://www.FreeRTOS.org
* http://aws.amazon.com/freertos
*
* 1 tab == 4 spaces!
*/
/* Standard includes. */
#include <stdlib.h>
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
/* Critical nesting should be initialised to a non zero value so interrupts don't
accidentally get enabled before the scheduler is started. */
#define portINITIAL_CRITICAL_NESTING (( StackType_t ) 10)
/* The PSW value assigned to tasks when they start to run for the first time. */
#define portPSW (( StackType_t ) 0x00000000)
/* We require the address of the pxCurrentTCB variable, but don't want to know
any details of its type. */
typedef void TCB_t;
extern volatile TCB_t * volatile pxCurrentTCB;
/* Keeps track of the nesting level of critical sections. */
volatile StackType_t usCriticalNesting = portINITIAL_CRITICAL_NESTING;
/*-----------------------------------------------------------*/
/* Sets up the timer to generate the tick interrupt. */
static void prvSetupTimerInterrupt( void );
/*-----------------------------------------------------------*/
StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )
{
*pxTopOfStack = ( StackType_t ) pxCode; /* Task function start address */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) pxCode; /* Task function start address */
pxTopOfStack--;
*pxTopOfStack = portPSW; /* Initial PSW value */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x20202020; /* Initial Value of R20 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x21212121; /* Initial Value of R21 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x22222222; /* Initial Value of R22 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x23232323; /* Initial Value of R23 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x24242424; /* Initial Value of R24 */
pxTopOfStack--;
#if (__DATA_MODEL__ == 0) || (__DATA_MODEL__ == 1)
*pxTopOfStack = ( StackType_t ) 0x25252525; /* Initial Value of R25 */
pxTopOfStack--;
#endif /* configDATA_MODE */
*pxTopOfStack = ( StackType_t ) 0x26262626; /* Initial Value of R26 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x27272727; /* Initial Value of R27 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x28282828; /* Initial Value of R28 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x29292929; /* Initial Value of R29 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x30303030; /* Initial Value of R30 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x19191919; /* Initial Value of R19 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x18181818; /* Initial Value of R18 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x17171717; /* Initial Value of R17 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x16161616; /* Initial Value of R16 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x15151515; /* Initial Value of R15 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x14141414; /* Initial Value of R14 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x13131313; /* Initial Value of R13 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x12121212; /* Initial Value of R12 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x11111111; /* Initial Value of R11 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x10101010; /* Initial Value of R10 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x99999999; /* Initial Value of R09 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x88888888; /* Initial Value of R08 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x77777777; /* Initial Value of R07 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x66666666; /* Initial Value of R06 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) 0x55555555; /* Initial Value of R05 */
pxTopOfStack--;
#if __DATA_MODEL__ == 0 || __DATA_MODEL__ == 1
*pxTopOfStack = ( StackType_t ) 0x44444444; /* Initial Value of R04 */
pxTopOfStack--;
#endif /* configDATA_MODE */
*pxTopOfStack = ( StackType_t ) 0x22222222; /* Initial Value of R02 */
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) pvParameters; /* R1 is expected to hold the function parameter*/
pxTopOfStack--;
*pxTopOfStack = ( StackType_t ) portNO_CRITICAL_SECTION_NESTING;
/*
* Return a pointer to the top of the stack we have generated so this can
* be stored in the task control block for the task.
*/
return pxTopOfStack;
}
/*-----------------------------------------------------------*/
BaseType_t xPortStartScheduler( void )
{
/* Setup the hardware to generate the tick. Interrupts are disabled when
this function is called. */
prvSetupTimerInterrupt();
/* Restore the context of the first task that is going to run. */
vPortStart();
/* Should not get here as the tasks are now running! */
return pdTRUE;
}
/*-----------------------------------------------------------*/
void vPortEndScheduler( void )
{
/* It is unlikely that the V850ES/Fx3 port will get stopped. If required simply
disable the tick interrupt here. */
}
/*-----------------------------------------------------------*/
/*
* Hardware initialisation to generate the RTOS tick. This uses
*/
static void prvSetupTimerInterrupt( void )
{
TM0CE = 0; /* TMM0 operation disable */
TM0EQMK0 = 1; /* INTTM0EQ0 interrupt disable */
TM0EQIF0 = 0; /* clear INTTM0EQ0 interrupt flag */
#ifdef __IAR_V850ES_Fx3__
{
TM0CMP0 = (((configCPU_CLOCK_HZ / configTICK_RATE_HZ) / 2)-1); /* divided by 2 because peripherals only run at CPU_CLOCK/2 */
}
#else
{
TM0CMP0 = (configCPU_CLOCK_HZ / configTICK_RATE_HZ);
}
#endif
TM0EQIC0 &= 0xF8;
TM0CTL0 = 0x00;
TM0EQIF0 = 0; /* clear INTTM0EQ0 interrupt flag */
TM0EQMK0 = 0; /* INTTM0EQ0 interrupt enable */
TM0CE = 1; /* TMM0 operation enable */
}
/*-----------------------------------------------------------*/