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/*
ChibiOS/RT - Copyright (C) 2006-2007 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/>.
*/
#include <time.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/time.h>
/**
* @addtogroup LINUXSIM_CORE
* @{
*/
#include <ch.h>
static struct itimerval tempo;
static bool_t pending = FALSE;
void timer(int numSignal) {
pending = TRUE;
}
/*
* Simulated HW initialization.
*/
void _init_core(void) {
signal(SIGALRM, timer);
tempo.it_value.tv_sec = 0;
tempo.it_value.tv_usec = 10000;
tempo.it_interval.tv_sec = 0;
tempo.it_interval.tv_usec = 10000;
setitimer(ITIMER_REAL, &tempo, NULL);
}
/*
* Interrupt simulation.
*/
void ChkIntSources(void) {
if (pending) {
chSysTimerHandlerI();
pending = FALSE;
}
if (chSchRescRequiredI())
chSchDoRescheduleI();
}
/**
* Performs a context switch between two threads.
* @param otp the thread to be switched out
* @param ntp the thread to be switched in
*/
__attribute__((used))
static void __dummy(Thread *otp, Thread *ntp) {
asm volatile (".globl @port_switch@8 \n\t" \
"@port_switch@8: \n\t" \
"push %ebp \n\t" \
"push %esi \n\t" \
"push %edi \n\t" \
"push %ebx \n\t" \
"movl %esp, 16(%ecx) \n\t" \
"movl 16(%edx), %esp \n\t" \
"pop %ebx \n\t" \
"pop %edi \n\t" \
"pop %esi \n\t" \
"pop %ebp \n\t" \
"ret");
}
/**
* Halts the system. In this implementation it just exits the simulation.
*/
__attribute__((fastcall))
void port_halt(void) {
exit(2);
}
/**
* Threads return point, it just invokes @p chThdExit().
*/
void threadexit(void) {
asm volatile ("push %eax \n\t" \
"call _chThdExit");
}
/** @} */
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