You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
119 lines
5.5 KiB
C
119 lines
5.5 KiB
C
;/*
|
|
; FreeRTOS V7.0.1 - Copyright (C) 2011 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!
|
|
;
|
|
; http://www.FreeRTOS.org - Documentation, latest information, license and
|
|
; contact details.
|
|
;
|
|
; http://www.SafeRTOS.com - A version that is certified for use in safety
|
|
; critical systems.
|
|
;
|
|
; http://www.OpenRTOS.com - Commercial support, development, porting,
|
|
; licensing and training services.
|
|
;*/
|
|
|
|
#include "FreeRTOSConfig.h"
|
|
|
|
; Variables used by scheduler
|
|
;------------------------------------------------------------------------------
|
|
EXTERN pxCurrentTCB
|
|
EXTERN usCriticalNesting
|
|
|
|
;------------------------------------------------------------------------------
|
|
; portSAVE_CONTEXT MACRO
|
|
; Saves the context of the general purpose registers, CS and ES (only in far
|
|
; memory mode) registers the usCriticalNesting Value and the Stack Pointer
|
|
; of the active Task onto the task stack
|
|
;------------------------------------------------------------------------------
|
|
portSAVE_CONTEXT MACRO
|
|
|
|
PUSH AX ; Save AX Register to stack.
|
|
PUSH HL
|
|
#if configMEMORY_MODE == 1
|
|
MOV A, CS ; Save CS register.
|
|
XCH A, X
|
|
MOV A, ES ; Save ES register.
|
|
PUSH AX
|
|
#else
|
|
MOV A, CS ; Save CS register.
|
|
PUSH AX
|
|
#endif
|
|
PUSH DE ; Save the remaining general purpose registers.
|
|
PUSH BC
|
|
MOVW AX, usCriticalNesting ; Save the usCriticalNesting value.
|
|
PUSH AX
|
|
MOVW AX, pxCurrentTCB ; Save the Stack pointer.
|
|
MOVW HL, AX
|
|
MOVW AX, SP
|
|
MOVW [HL], AX
|
|
ENDM
|
|
;------------------------------------------------------------------------------
|
|
|
|
;------------------------------------------------------------------------------
|
|
; portRESTORE_CONTEXT MACRO
|
|
; Restores the task Stack Pointer then use this to restore usCriticalNesting,
|
|
; general purpose registers and the CS and ES (only in far memory mode)
|
|
; of the selected task from the task stack
|
|
;------------------------------------------------------------------------------
|
|
portRESTORE_CONTEXT MACRO
|
|
MOVW AX, pxCurrentTCB ; Restore the Stack pointer.
|
|
MOVW HL, AX
|
|
MOVW AX, [HL]
|
|
MOVW SP, AX
|
|
POP AX ; Restore usCriticalNesting value.
|
|
MOVW usCriticalNesting, AX
|
|
POP BC ; Restore the necessary general purpose registers.
|
|
POP DE
|
|
#if configMEMORY_MODE == 1
|
|
POP AX ; Restore the ES register.
|
|
MOV ES, A
|
|
XCH A, X ; Restore the CS register.
|
|
MOV CS, A
|
|
#else
|
|
POP AX
|
|
MOV CS, A ; Restore CS register.
|
|
#endif
|
|
POP HL ; Restore general purpose register HL.
|
|
POP AX ; Restore AX.
|
|
ENDM
|
|
;------------------------------------------------------------------------------
|