77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file RC/STM8/chcore.c
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* @brief STM8 (Raisonance) architecture port code.
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*
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* @addtogroup STM8_RAISONANCE_CORE
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* @{
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*/
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#pragma SRC("tmp.asm")
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#include "ch.h"
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page0 ReadyList rlist;
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/**
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* @brief Performs a context switch between two threads.
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*
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* @param otp the thread to be switched out
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*/
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void _port_switch(Thread *otp) {
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(void)otp;
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/* Asm because unoptimal code would generated by using _getSP_().*/
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#pragma ASM
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LDW Y,SP ; old context pointer
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LDW (5,X),Y ; SP saved in otp->p_ctx.sp
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LDW X,rlist + 5 ; r_current (currp) field
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LDW X,(5,X) ; currp->p_ctx.sp
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LDW SP,X ; new context pointer
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#pragma ENDASM
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}
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/**
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* @brief Thread start code.
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*/
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void _port_thread_start(void) {
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#pragma ASM
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RIM
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POPW X
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#pragma ENDASM
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}
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/**
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* @brief Halts the system.
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* @details This function is invoked by the operating system when an
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* unrecoverable error is detected (as example because a programming
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* error in the application code that triggers an assertion while in
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* debug mode).
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*/
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void port_halt(void) {
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port_disable();
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while (TRUE) {
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}
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}
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/** @} */
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