esp-open-rtos/FreeRTOS/Source/portable/esp8266/portmacro.h

/*
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    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

    ***************************************************************************
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    ***************************************************************************

    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
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    ***************************************************************************
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*/


#ifndef PORTMACRO_H
#define PORTMACRO_H

#ifdef __cplusplus
extern "C" {
#endif

#include "esp8266.h"
#include "espressif/esp8266/ets_sys.h"
#include <stdint.h>
#include    <xtruntime.h>
#include    "xtensa_rtos.h"
#include "xtensa_interrupts.h"

/*-----------------------------------------------------------
 * Port specific definitions for ESP8266
 *
 * 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               short
#define portSTACK_TYPE          unsigned portLONG
#define portBASE_TYPE           long

typedef uint32_t portTickType;
#define portMAX_DELAY ( portTickType ) 0xffffffff

/* Architecture specifics. */
#define portSTACK_GROWTH			( -1 )
#define portTICK_RATE_MS			( ( portTickType ) 1000 / configTICK_RATE_HZ )
#define portBYTE_ALIGNMENT			8
/*-----------------------------------------------------------*/

enum SVC_ReqType {
  SVC_Software = 1,
  SVC_MACLayer = 2,
};

/* Scheduler utilities. */
void PendSV(enum SVC_ReqType);
#define portYIELD()	PendSV(SVC_Software)

/* Task utilities. */
#define portEND_SWITCHING_ISR( xSwitchRequired )			\
    {									\
	extern void vTaskSwitchContext( void );				\
									\
	if( xSwitchRequired )						\
	{								\
	    vTaskSwitchContext();					\
	}								\
    }

/*-----------------------------------------------------------*/

/* NMIIrqIsOn flag is defined in libpp.a, and appears to be set when an NMI
   (int level 3) is currently runnning (during which time libpp.a might
   call back into parts of the OS?)

   The esp_iot_rtos_sdk disables all interrupt manipulations while this
   flag is set.

   It's also referenced from some other blob libraries (not known if
   read or written there).

   ESPTODO: It may be possible to just read the 'ps' register instead
   of accessing thisvariable.
*/
extern char sdk_NMIIrqIsOn;
extern char level1_int_disabled;
extern unsigned cpu_sr;

/* ESPTODO: Currently we store the old interrupt level (ps) in a
   global variable cpu_sr. It may not be necessary to do this,
   especially as lx106 has only one real interrupt level + NMI, but it
   all depends on how the blob libraries call into these functions.
*/
inline static __attribute__((always_inline)) void _esp_disable_interrupts(void)
{
    if(!sdk_NMIIrqIsOn && !level1_int_disabled) {
	__asm__ volatile ("rsil %0, " XTSTR(XCHAL_EXCM_LEVEL) : "=a" (cpu_sr) :: "memory");
	level1_int_disabled = 1;
    }
}

inline static __attribute__((always_inline)) void _esp_enable_interrupts(void)
{
    if(!sdk_NMIIrqIsOn && level1_int_disabled) {
	level1_int_disabled = 0;
	__asm__ volatile ("wsr %0, ps" :: "a" (cpu_sr) : "memory");
    }
}

/* Disable interrupts, saving previous state in cpu_sr */
#define  portDISABLE_INTERRUPTS() _esp_disable_interrupts()

/* Restore interrupts to previous level saved in cpu_sr */
#define  portENABLE_INTERRUPTS() _esp_enable_interrupts()

/* Critical section management. */
void vPortEnterCritical( void );
void vPortExitCritical( void );

#define portENTER_CRITICAL()                vPortEnterCritical()
#define portEXIT_CRITICAL()                 vPortExitCritical()

/* Task function macros as described on the FreeRTOS.org WEB site.  These are
not necessary for to use this port.  They are defined so the common demo files
(which build with all the ports) will build. */
#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
/*-----------------------------------------------------------*/

/* ESPTODO: These parts of the FreeRTOS support are still in binary libraries */
#define vApplicationStackOverflowHook sdk_vApplicationStackOverflowHook

#ifdef __cplusplus
}
#endif

#endif /* PORTMACRO_H */