chcore.c
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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT 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
along with this program. If not, see <http://www.gnu.org/licenses/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @file RC/STM8/chcore.c
* @brief STM8 (Raisonance) architecture port code.
*
* @addtogroup STM8_RAISONANCE_CORE
* @{
*/
#pragma SRC("tmp.asm")
#include "ch.h"
page0 ReadyList rlist;
/**
* @brief Performs a context switch between two threads.
*
* @param otp the thread to be switched out
*/
void _port_switch(Thread *otp) {
(void)otp;
/* Asm because unoptimal code would generated by using _getSP_().*/
#pragma ASM
LDW Y,SP ; old context pointer
LDW (5,X),Y ; SP saved in otp->p_ctx.sp
LDW X,rlist + 5 ; r_current (currp) field
LDW X,(5,X) ; currp->p_ctx.sp
LDW SP,X ; new context pointer
#pragma ENDASM
}
/**
* @brief Thread start code.
*/
void _port_thread_start(void) {
chSysUnlock();
#pragma ASM
POPW X
#pragma ENDASM
}
/**
* @brief Halts the system.
* @details This function is invoked by the operating system when an
* unrecoverable error is detected (for example because a programming
* error in the application code that triggers an assertion while in
* debug mode).
*/
void port_halt(void) {
port_disable();
while (TRUE) {
}
}
/** @} */