109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2007 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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#include <time.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <stdio.h>
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/**
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* @addtogroup LINUXSIM_CORE
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* @{
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*/
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#include <ch.h>
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static struct itimerval tempo;
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static bool_t pending = FALSE;
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void timer(int numSignal) {
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pending = TRUE;
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}
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/*
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* Simulated HW initialization.
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*/
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void _init_core(void) {
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signal(SIGALRM, timer);
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tempo.it_value.tv_sec = 0;
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tempo.it_value.tv_usec = 10000;
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tempo.it_interval.tv_sec = 0;
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tempo.it_interval.tv_usec = 10000;
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setitimer(ITIMER_REAL, &tempo, NULL);
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}
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/*
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* Interrupt simulation.
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*/
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void ChkIntSources(void) {
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if (pending) {
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chSysTimerHandlerI();
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pending = FALSE;
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}
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if (chSchIsRescRequiredExI())
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chSchDoRescheduleI();
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}
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/**
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* Performs a context switch between two threads.
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* @param otp the thread to be switched out
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* @param ntp the thread to be switched in
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*/
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__attribute__((used))
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static void __dummy(Thread *otp, Thread *ntp) {
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asm volatile (".globl port_switch \n\t" \
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"port_switch: \n\t" \
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"push %ebp \n\t" \
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"push %esi \n\t" \
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"push %edi \n\t" \
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"push %ebx \n\t" \
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"movl %esp, 16(%ecx) \n\t" \
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"movl 16(%edx), %esp \n\t" \
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"pop %ebx \n\t" \
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"pop %edi \n\t" \
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"pop %esi \n\t" \
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"pop %ebp \n\t" \
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"ret");
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}
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/**
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* Halts the system. In this implementation it just exits the simulation.
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*/
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__attribute__((fastcall))
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void port_halt(void) {
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exit(2);
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}
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/**
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* Threads return point, it just invokes @p chThdExit().
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*/
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void threadexit(void) {
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asm volatile ("push %eax \n\t" \
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"call chThdExit");
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}
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/** @} */
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