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Add FreeRTOS-Plus directory.
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Richard Barry
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6798 changed files with 134949 additions and 19 deletions
126
FreeRTOS/Source/portable/BCC/16BitDOS/common/portasm.h
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126
FreeRTOS/Source/portable/BCC/16BitDOS/common/portasm.h
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/*
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FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* FreeRTOS tutorial books are available in pdf and paperback. *
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* Complete, revised, and edited pdf reference manuals are also *
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* available. *
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* *
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* Purchasing FreeRTOS documentation will not only help you, by *
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* ensuring you get running as quickly as possible and with an *
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* in-depth knowledge of how to use FreeRTOS, it will also help *
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* the FreeRTOS project to continue with its mission of providing *
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* professional grade, cross platform, de facto standard solutions *
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* for microcontrollers - completely free of charge! *
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* *
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* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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* *
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* Thank you for using FreeRTOS, and thank you for your support! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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>>>NOTE<<< The modification to the GPL is included to allow you to
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distribute a combined work that includes FreeRTOS without being obliged to
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provide the source code for proprietary components outside of the FreeRTOS
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kernel. FreeRTOS is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details. You should have received a copy of the GNU General Public
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License and the FreeRTOS license exception along with FreeRTOS; if not it
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can be viewed here: http://www.freertos.org/a00114.html and also obtained
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by writing to Richard Barry, contact details for whom are available on the
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FreeRTOS WEB site.
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1 tab == 4 spaces!
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***************************************************************************
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* *
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* Having a problem? Start by reading the FAQ "My application does *
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* not run, what could be wrong? *
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* *
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* http://www.FreeRTOS.org/FAQHelp.html *
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* *
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***************************************************************************
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http://www.FreeRTOS.org - Documentation, training, latest information,
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license and contact details.
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http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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including FreeRTOS+Trace - an indispensable productivity tool.
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Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
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the code with commercial support, indemnification, and middleware, under
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the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
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provide a safety engineered and independently SIL3 certified version under
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the SafeRTOS brand: http://www.SafeRTOS.com.
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*/
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#ifndef PORT_ASM_H
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#define PORT_ASM_H
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typedef void tskTCB;
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extern volatile tskTCB * volatile pxCurrentTCB;
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extern void vTaskSwitchContext( void );
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/*
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* Saves the stack pointer for one task into its TCB, calls
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* vTaskSwitchContext() to update the TCB being used, then restores the stack
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* from the new TCB read to run the task.
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*/
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void portSWITCH_CONTEXT( void );
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/*
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* Load the stack pointer from the TCB of the task which is going to be first
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* to execute. Then force an IRET so the registers and IP are popped off the
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* stack.
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*/
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void portFIRST_CONTEXT( void );
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/* There are slightly different versions depending on whether you are building
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to include debugger information. If debugger information is used then there
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are a couple of extra bytes left of the ISR stack (presumably for use by the
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debugger). The true stack pointer is then stored in the bp register. We add
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2 to the stack pointer to remove the extra bytes before we restore our context. */
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#define portSWITCH_CONTEXT() \
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asm { mov ax, seg pxCurrentTCB } \
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asm { mov ds, ax } \
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asm { les bx, pxCurrentTCB } /* Save the stack pointer into the TCB. */ \
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asm { mov es:0x2[ bx ], ss } \
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asm { mov es:[ bx ], sp } \
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asm { call far ptr vTaskSwitchContext } /* Perform the switch. */ \
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asm { mov ax, seg pxCurrentTCB } /* Restore the stack pointer from the TCB. */ \
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asm { mov ds, ax } \
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asm { les bx, dword ptr pxCurrentTCB } \
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asm { mov ss, es:[ bx + 2 ] } \
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asm { mov sp, es:[ bx ] }
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#define portFIRST_CONTEXT() \
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__asm { mov ax, seg pxCurrentTCB } \
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__asm { mov ds, ax } \
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__asm { les bx, dword ptr pxCurrentTCB } \
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__asm { mov ss, es:[ bx + 2 ] } \
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__asm { mov sp, es:[ bx ] } \
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__asm { pop bp } \
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__asm { pop di } \
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__asm { pop si } \
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__asm { pop ds } \
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__asm { pop es } \
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__asm { pop dx } \
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__asm { pop cx } \
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__asm { pop bx } \
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__asm { pop ax } \
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__asm { iret }
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#endif
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