FreeRTOS/Source/portable/GCC/ARM7_LPC2000/portmacro.h - nest-connect/1.3/freertos - Git at Google

 /*
     FreeRTOS V7.2.0 - Copyright (C) 2012 Real Time Engineers Ltd.


     ***************************************************************************
      *                                                                       *
      *    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!

     ***************************************************************************
      *                                                                       *
      *    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, training, latest information,
     license and contact details.

     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
     including FreeRTOS+Trace - an indispensable productivity tool.

     Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
     the code with commercial support, indemnification, and middleware, under
     the OpenRTOS brand: http://www.OpenRTOS.com.  High Integrity Systems also
     provide a safety engineered and independently SIL3 certified version under
     the SafeRTOS brand: http://www.SafeRTOS.com.
 */

 #ifndef PORTMACRO_H
 #define PORTMACRO_H

 #ifdef __cplusplus
 extern "C" {
 #endif

 /*-----------------------------------------------------------
  * 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		short
 #define portSTACK_TYPE	unsigned portLONG
 #define portBASE_TYPE	portLONG

 #if( configUSE_16_BIT_TICKS == 1 )
 	typedef unsigned portSHORT portTickType;
 	#define portMAX_DELAY ( portTickType ) 0xffff
 #else
 	typedef unsigned portLONG portTickType;
 	#define portMAX_DELAY ( portTickType ) 0xffffffff
 #endif
 /*-----------------------------------------------------------*/

 /* Architecture specifics. */
 #define portSTACK_GROWTH			( -1 )
 #define portTICK_RATE_MS			( ( portTickType ) 1000 / configTICK_RATE_HZ )
 #define portBYTE_ALIGNMENT			8
 #define portNOP()					__asm volatile ( "NOP" );
 /*-----------------------------------------------------------*/


 /* Scheduler utilities. */

 /*
  * portRESTORE_CONTEXT, portRESTORE_CONTEXT, portENTER_SWITCHING_ISR
  * and portEXIT_SWITCHING_ISR can only be called from ARM mode, but
  * are included here for efficiency.  An attempt to call one from
  * THUMB mode code will result in a compile time error.
  */

 #define portRESTORE_CONTEXT()											\
 {																		\
 extern volatile void * volatile pxCurrentTCB;							\
 extern volatile unsigned portLONG ulCriticalNesting;					\
 																		\
 	/* Set the LR to the task stack. */									\
 	__asm volatile (													\
 	"LDR		R0, =pxCurrentTCB								\n\t"	\
 	"LDR		R0, [R0]										\n\t"	\
 	"LDR		LR, [R0]										\n\t"	\
 																		\
 	/* The critical nesting depth is the first item on the stack. */	\
 	/* Load it into the ulCriticalNesting variable. */					\
 	"LDR		R0, =ulCriticalNesting							\n\t"	\
 	"LDMFD	LR!, {R1}											\n\t"	\
 	"STR		R1, [R0]										\n\t"	\
 																		\
 	/* Get the SPSR from the stack. */									\
 	"LDMFD	LR!, {R0}											\n\t"	\
 	"MSR		SPSR, R0										\n\t"	\
 																		\
 	/* Restore all system mode registers for the task. */				\
 	"LDMFD	LR, {R0-R14}^										\n\t"	\
 	"NOP														\n\t"	\
 																		\
 	/* Restore the return address. */									\
 	"LDR		LR, [LR, #+60]									\n\t"	\
 																		\
 	/* And return - correcting the offset in the LR to obtain the */	\
 	/* correct address. */												\
 	"SUBS	PC, LR, #4											\n\t"	\
 	);																	\
 	( void ) ulCriticalNesting;											\
 	( void ) pxCurrentTCB;												\
 }
 /*-----------------------------------------------------------*/

 #define portSAVE_CONTEXT()												\
 {																		\
 extern volatile void * volatile pxCurrentTCB;							\
 extern volatile unsigned portLONG ulCriticalNesting;					\
 																		\
 	/* Push R0 as we are going to use the register. */					\
 	__asm volatile (													\
 	"STMDB	SP!, {R0}											\n\t"	\
 																		\
 	/* Set R0 to point to the task stack pointer. */					\
 	"STMDB	SP,{SP}^											\n\t"	\
 	"NOP														\n\t"	\
 	"SUB	SP, SP, #4											\n\t"	\
 	"LDMIA	SP!,{R0}											\n\t"	\
 																		\
 	/* Push the return address onto the stack. */						\
 	"STMDB	R0!, {LR}											\n\t"	\
 																		\
 	/* Now we have saved LR we can use it instead of R0. */				\
 	"MOV	LR, R0												\n\t"	\
 																		\
 	/* Pop R0 so we can save it onto the system mode stack. */			\
 	"LDMIA	SP!, {R0}											\n\t"	\
 																		\
 	/* Push all the system mode registers onto the task stack. */		\
 	"STMDB	LR,{R0-LR}^											\n\t"	\
 	"NOP														\n\t"	\
 	"SUB	LR, LR, #60											\n\t"	\
 																		\
 	/* Push the SPSR onto the task stack. */							\
 	"MRS	R0, SPSR											\n\t"	\
 	"STMDB	LR!, {R0}											\n\t"	\
 																		\
 	"LDR	R0, =ulCriticalNesting								\n\t"	\
 	"LDR	R0, [R0]											\n\t"	\
 	"STMDB	LR!, {R0}											\n\t"	\
 																		\
 	/* Store the new top of stack for the task. */						\
 	"LDR	R0, =pxCurrentTCB									\n\t"	\
 	"LDR	R0, [R0]											\n\t"	\
 	"STR	LR, [R0]											\n\t"	\
 	);																	\
 	( void ) ulCriticalNesting;											\
 	( void ) pxCurrentTCB;												\
 }

 extern void vTaskSwitchContext( void );
 #define portYIELD_FROM_ISR()		vTaskSwitchContext()
 #define portYIELD()					__asm volatile ( "SWI 0" )
 /*-----------------------------------------------------------*/


 /* Critical section management. */

 /*
  * The interrupt management utilities can only be called from ARM mode.  When
  * THUMB_INTERWORK is defined the utilities are defined as functions in
  * portISR.c to ensure a switch to ARM mode.  When THUMB_INTERWORK is not
  * defined then the utilities are defined as macros here - as per other ports.
  */

 #ifdef THUMB_INTERWORK

 	extern void vPortDisableInterruptsFromThumb( void ) __attribute__ ((naked));
 	extern void vPortEnableInterruptsFromThumb( void ) __attribute__ ((naked));

 	#define portDISABLE_INTERRUPTS()	vPortDisableInterruptsFromThumb()
 	#define portENABLE_INTERRUPTS()		vPortEnableInterruptsFromThumb()

 #else

 	#define portDISABLE_INTERRUPTS()											\
 		__asm volatile (														\
 			"STMDB	SP!, {R0}		\n\t"	/* Push R0.						*/	\
 			"MRS	R0, CPSR		\n\t"	/* Get CPSR.					*/	\
 			"ORR	R0, R0, #0xC0	\n\t"	/* Disable IRQ, FIQ.			*/	\
 			"MSR	CPSR, R0		\n\t"	/* Write back modified value.	*/	\
 			"LDMIA	SP!, {R0}			" )	/* Pop R0.						*/

 	#define portENABLE_INTERRUPTS()												\
 		__asm volatile (														\
 			"STMDB	SP!, {R0}		\n\t"	/* Push R0.						*/	\
 			"MRS	R0, CPSR		\n\t"	/* Get CPSR.					*/	\
 			"BIC	R0, R0, #0xC0	\n\t"	/* Enable IRQ, FIQ.				*/	\
 			"MSR	CPSR, R0		\n\t"	/* Write back modified value.	*/	\
 			"LDMIA	SP!, {R0}			" )	/* Pop R0.						*/

 #endif /* THUMB_INTERWORK */

 extern void vPortEnterCritical( void );
 extern void vPortExitCritical( void );

 #define portENTER_CRITICAL()		vPortEnterCritical();
 #define portEXIT_CRITICAL()			vPortExitCritical();
 /*-----------------------------------------------------------*/

 /* 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 )

 #ifdef __cplusplus
 }
 #endif

 #endif /* PORTMACRO_H */
	/*
	FreeRTOS V7.2.0 - Copyright (C) 2012 Real Time Engineers Ltd.


	***************************************************************************
	* *
	* 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!

	***************************************************************************
	* *
	* 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, training, latest information,
	license and contact details.

	http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
	including FreeRTOS+Trace - an indispensable productivity tool.

	Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
	the code with commercial support, indemnification, and middleware, under
	the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
	provide a safety engineered and independently SIL3 certified version under
	the SafeRTOS brand: http://www.SafeRTOS.com.
	*/

	#ifndef PORTMACRO_H
	#define PORTMACRO_H

	#ifdef __cplusplus
	extern "C" {
	#endif

	/*-----------------------------------------------------------
	* 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 short
	#define portSTACK_TYPE unsigned portLONG
	#define portBASE_TYPE portLONG

	#if( configUSE_16_BIT_TICKS == 1 )
	typedef unsigned portSHORT portTickType;
	#define portMAX_DELAY ( portTickType ) 0xffff
	#else
	typedef unsigned portLONG portTickType;
	#define portMAX_DELAY ( portTickType ) 0xffffffff
	#endif
	/-----------------------------------------------------------/

	/* Architecture specifics. */
	#define portSTACK_GROWTH ( -1 )
	#define portTICK_RATE_MS ( ( portTickType ) 1000 / configTICK_RATE_HZ )
	#define portBYTE_ALIGNMENT 8
	#define portNOP() __asm volatile ( "NOP" );
	/-----------------------------------------------------------/


	/* Scheduler utilities. */

	/*
	* portRESTORE_CONTEXT, portRESTORE_CONTEXT, portENTER_SWITCHING_ISR
	* and portEXIT_SWITCHING_ISR can only be called from ARM mode, but
	* are included here for efficiency. An attempt to call one from
	* THUMB mode code will result in a compile time error.
	*/

	#define portRESTORE_CONTEXT() \
	{ \
	extern volatile void * volatile pxCurrentTCB; \
	extern volatile unsigned portLONG ulCriticalNesting; \
	\
	/* Set the LR to the task stack. */ \
	__asm volatile ( \
	"LDR R0, =pxCurrentTCB \n\t" \
	"LDR R0, [R0] \n\t" \
	"LDR LR, [R0] \n\t" \
	\
	/* The critical nesting depth is the first item on the stack. */ \
	/* Load it into the ulCriticalNesting variable. */ \
	"LDR R0, =ulCriticalNesting \n\t" \
	"LDMFD LR!, {R1} \n\t" \
	"STR R1, [R0] \n\t" \
	\
	/* Get the SPSR from the stack. */ \
	"LDMFD LR!, {R0} \n\t" \
	"MSR SPSR, R0 \n\t" \
	\
	/* Restore all system mode registers for the task. */ \
	"LDMFD LR, {R0-R14}^ \n\t" \
	"NOP \n\t" \
	\
	/* Restore the return address. */ \
	"LDR LR, [LR, #+60] \n\t" \
	\
	/* And return - correcting the offset in the LR to obtain the */ \
	/* correct address. */ \
	"SUBS PC, LR, #4 \n\t" \
	); \
	( void ) ulCriticalNesting; \
	( void ) pxCurrentTCB; \
	}
	/-----------------------------------------------------------/

	#define portSAVE_CONTEXT() \
	{ \
	extern volatile void * volatile pxCurrentTCB; \
	extern volatile unsigned portLONG ulCriticalNesting; \
	\
	/* Push R0 as we are going to use the register. */ \
	__asm volatile ( \
	"STMDB SP!, {R0} \n\t" \
	\
	/* Set R0 to point to the task stack pointer. */ \
	"STMDB SP,{SP}^ \n\t" \
	"NOP \n\t" \
	"SUB SP, SP, #4 \n\t" \
	"LDMIA SP!,{R0} \n\t" \
	\
	/* Push the return address onto the stack. */ \
	"STMDB R0!, {LR} \n\t" \
	\
	/* Now we have saved LR we can use it instead of R0. */ \
	"MOV LR, R0 \n\t" \
	\
	/* Pop R0 so we can save it onto the system mode stack. */ \
	"LDMIA SP!, {R0} \n\t" \
	\
	/* Push all the system mode registers onto the task stack. */ \
	"STMDB LR,{R0-LR}^ \n\t" \
	"NOP \n\t" \
	"SUB LR, LR, #60 \n\t" \
	\
	/* Push the SPSR onto the task stack. */ \
	"MRS R0, SPSR \n\t" \
	"STMDB LR!, {R0} \n\t" \
	\
	"LDR R0, =ulCriticalNesting \n\t" \
	"LDR R0, [R0] \n\t" \
	"STMDB LR!, {R0} \n\t" \
	\
	/* Store the new top of stack for the task. */ \
	"LDR R0, =pxCurrentTCB \n\t" \
	"LDR R0, [R0] \n\t" \
	"STR LR, [R0] \n\t" \
	); \
	( void ) ulCriticalNesting; \
	( void ) pxCurrentTCB; \
	}

	extern void vTaskSwitchContext( void );
	#define portYIELD_FROM_ISR() vTaskSwitchContext()
	#define portYIELD() __asm volatile ( "SWI 0" )
	/-----------------------------------------------------------/


	/* Critical section management. */

	/*
	* The interrupt management utilities can only be called from ARM mode. When
	* THUMB_INTERWORK is defined the utilities are defined as functions in
	* portISR.c to ensure a switch to ARM mode. When THUMB_INTERWORK is not
	* defined then the utilities are defined as macros here - as per other ports.
	*/

	#ifdef THUMB_INTERWORK

	extern void vPortDisableInterruptsFromThumb( void ) __attribute__ ((naked));
	extern void vPortEnableInterruptsFromThumb( void ) __attribute__ ((naked));

	#define portDISABLE_INTERRUPTS() vPortDisableInterruptsFromThumb()
	#define portENABLE_INTERRUPTS() vPortEnableInterruptsFromThumb()

	#else

	#define portDISABLE_INTERRUPTS() \
	__asm volatile ( \
	"STMDB SP!, {R0} \n\t" /* Push R0. */ \
	"MRS R0, CPSR \n\t" /* Get CPSR. */ \
	"ORR R0, R0, #0xC0 \n\t" /* Disable IRQ, FIQ. */ \
	"MSR CPSR, R0 \n\t" /* Write back modified value. */ \
	"LDMIA SP!, {R0} " ) /* Pop R0. */

	#define portENABLE_INTERRUPTS() \
	__asm volatile ( \
	"STMDB SP!, {R0} \n\t" /* Push R0. */ \
	"MRS R0, CPSR \n\t" /* Get CPSR. */ \
	"BIC R0, R0, #0xC0 \n\t" /* Enable IRQ, FIQ. */ \
	"MSR CPSR, R0 \n\t" /* Write back modified value. */ \
	"LDMIA SP!, {R0} " ) /* Pop R0. */

	#endif /* THUMB_INTERWORK */

	extern void vPortEnterCritical( void );
	extern void vPortExitCritical( void );

	#define portENTER_CRITICAL() vPortEnterCritical();
	#define portEXIT_CRITICAL() vPortExitCritical();
	/-----------------------------------------------------------/

	/* 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 )

	#ifdef __cplusplus
	}
	#endif

	#endif /* PORTMACRO_H */