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/*
* FreeRTOS Kernel <DEVELOPMENT BRANCH>
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* SPDX-License-Identifier: MIT
*
* 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.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
#ifndef PORTMACRO_H
#define PORTMACRO_H
/* *INDENT-OFF* */
#ifdef __cplusplus
extern "C" {
#endif
/* *INDENT-ON* */
#include <avr/sleep.h>
/*-----------------------------------------------------------
* Port specific definitions.
*
* The settings in this file configure FreeRTOS correctly for the
* given hardware and compiler.
*
* These settings should not be altered.
*-----------------------------------------------------------
*/
/* Type definitions. */
#define portCHAR char
#define portFLOAT float
#define portDOUBLE double
#define portLONG long
#define portSHORT int
#define portSTACK_TYPE uint8_t
#define portBASE_TYPE char
#define portPOINTER_SIZE_TYPE uint16_t
typedef portSTACK_TYPE StackType_t;
typedef signed char BaseType_t;
typedef unsigned char UBaseType_t;
#if ( configUSE_16_BIT_TICKS == 1 )
typedef uint16_t TickType_t;
#define portMAX_DELAY ( TickType_t ) 0xffff
#else
typedef uint32_t TickType_t;
#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
#endif
/*-----------------------------------------------------------*/
/* Critical section management. */
#define portENTER_CRITICAL() \
asm volatile ( "in __tmp_reg__, __SREG__" ); \
asm volatile ( "cli" ); \
asm volatile ( "push __tmp_reg__" )
#define portEXIT_CRITICAL() \
asm volatile ( "pop __tmp_reg__" ); \
asm volatile ( "out __SREG__, __tmp_reg__" )
#define portDISABLE_INTERRUPTS() asm volatile ( "cli" ::);
#define portENABLE_INTERRUPTS() asm volatile ( "sei" ::);
/*-----------------------------------------------------------*/
/* Architecture specifics. */
#define portSTACK_GROWTH ( -1 )
#define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
#define portBYTE_ALIGNMENT 1
#define portNOP() asm volatile ( "nop" );
/*-----------------------------------------------------------*/
/* Kernel utilities. */
extern void vPortYield( void ) __attribute__( ( naked ) );
#define portYIELD() vPortYield()
extern void vPortYieldFromISR( void ) __attribute__( ( naked ) );
#define portYIELD_FROM_ISR() vPortYieldFromISR()
/*-----------------------------------------------------------*/
/* Task function macros as described on the FreeRTOS.org WEB site. */
#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
/* Macros for tickless idle/low power functionality. */
#ifndef portSUPPRESS_TICKS_AND_SLEEP
extern void vPortSuppressTicksAndSleep(TickType_t xExpectedIdleTime);
#define portSUPPRESS_TICKS_AND_SLEEP(xExpectedIdleTime) vPortSuppressTicksAndSleep(xExpectedIdleTime)
#endif
#ifndef configPRE_PWR_DOWN_PROCESSING
#define configPRE_PWR_DOWN_PROCESSING()
#endif
#ifndef configPOST_PWR_DOWN_PROCESSING
#define configPOST_PWR_DOWN_PROCESSING()
#endif
/*-----------------------------------------------------------*/
/* Helper macros for portSAVE_CONTEXT/ portRESTORE_CONTEXT - common support for Mega-0 and AVR-Dx families */
#if defined(__AVR_HAVE_RAMPZ__)
#define portSAVE_RAMPZ() \
asm volatile("in r0, __RAMPZ__ \n\t" \
"push r0 \n\t");
#define portRESTORE_RAMPZ() \
asm volatile("pop r0 \n\t" \
"out __RAMPZ__, r0 \n\t");
#else
#define portSAVE_RAMPZ()
#define portRESTORE_RAMPZ()
#endif
/* Macro to save all the general purpose registers, the save the stack pointer
* into the TCB.
* The first thing we do is save the flags then disable interrupts. This is to
* guard our stack against having a context switch interrupt after we have already
* pushed the registers onto the stack - causing the 32 registers to be on the
* stack twice.
* r1 is set to zero as the compiler expects it to be thus, however some
* of the math routines make use of R1.
* The interrupts will have been disabled during the call to portSAVE_CONTEXT()
* so we need not worry about reading/writing to the stack pointer. */
#define portSAVE_CONTEXT() \
{ \
asm volatile("push r0 \n\t" \
"in r0, __SREG__ \n\t" \
"cli \n\t" \
"push r0 \n\t"); \
portSAVE_RAMPZ(); \
asm volatile("push r1 \n\t" \
"clr r1 \n\t" \
"push r2 \n\t" \
"push r3 \n\t" \
"push r4 \n\t" \
"push r5 \n\t" \
"push r6 \n\t" \
"push r7 \n\t" \
"push r8 \n\t" \
"push r9 \n\t" \
"push r10 \n\t" \
"push r11 \n\t" \
"push r12 \n\t" \
"push r13 \n\t" \
"push r14 \n\t" \
"push r15 \n\t" \
"push r16 \n\t" \
"push r17 \n\t" \
"push r18 \n\t" \
"push r19 \n\t" \
"push r20 \n\t" \
"push r21 \n\t" \
"push r22 \n\t" \
"push r23 \n\t" \
"push r24 \n\t" \
"push r25 \n\t" \
"push r26 \n\t" \
"push r27 \n\t" \
"push r28 \n\t" \
"push r29 \n\t" \
"push r30 \n\t" \
"push r31 \n\t" \
"lds r26, pxCurrentTCB \n\t" \
"lds r27, pxCurrentTCB + 1 \n\t" \
"in r0, __SP_L__ \n\t" \
"st x+, r0 \n\t" \
"in r0, __SP_H__ \n\t" \
"st x+, r0 \n\t"); \
}
/* Opposite to portSAVE_CONTEXT(). Interrupts will have been disabled during
* the context save so we can write to the stack pointer. */
#define portRESTORE_CONTEXT() \
{ \
asm volatile("lds r26, pxCurrentTCB \n\t" \
"lds r27, pxCurrentTCB + 1 \n\t" \
"ld r28, x+ \n\t" \
"out __SP_L__, r28 \n\t" \
"ld r29, x+ \n\t" \
"out __SP_H__, r29 \n\t" \
"pop r31 \n\t" \
"pop r30 \n\t" \
"pop r29 \n\t" \
"pop r28 \n\t" \
"pop r27 \n\t" \
"pop r26 \n\t" \
"pop r25 \n\t" \
"pop r24 \n\t" \
"pop r23 \n\t" \
"pop r22 \n\t" \
"pop r21 \n\t" \
"pop r20 \n\t" \
"pop r19 \n\t" \
"pop r18 \n\t" \
"pop r17 \n\t" \
"pop r16 \n\t" \
"pop r15 \n\t" \
"pop r14 \n\t" \
"pop r13 \n\t" \
"pop r12 \n\t" \
"pop r11 \n\t" \
"pop r10 \n\t" \
"pop r9 \n\t" \
"pop r8 \n\t" \
"pop r7 \n\t" \
"pop r6 \n\t" \
"pop r5 \n\t" \
"pop r4 \n\t" \
"pop r3 \n\t" \
"pop r2 \n\t" \
"pop r1 \n\t"); \
portRESTORE_RAMPZ(); \
asm volatile("pop r0 \n\t" \
"out __SREG__, r0 \n\t" \
"pop r0 \n\t"); \
}
/*-----------------------------------------------------------*/
#define portSET_MODE_AND_SLEEP(mode) \
{ \
set_sleep_mode(mode); \
sleep_enable(); \
portENABLE_INTERRUPTS(); \
sleep_cpu(); \
portDISABLE_INTERRUPTS(); \
sleep_disable(); \
}
/* *INDENT-OFF* */
#ifdef __cplusplus
}
#endif
/* *INDENT-ON* */
#endif /* PORTMACRO_H */
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