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/*
ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio.
This file is part of ChibiOS.
ChibiOS 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 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/>.
*/
/**
* @file SIMIA32/chcore.c
* @brief Simulator on IA32 port code.
*
* @addtogroup SIMIA32_GCC_CORE
* @{
*/
#if defined(WIN32)
#include <windows.h>
#else
#include <sys/time.h>
#endif
#include "ch.h"
/*===========================================================================*/
/* Module local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Module exported variables. */
/*===========================================================================*/
bool port_isr_context_flag;
syssts_t port_irq_sts;
/*===========================================================================*/
/* Module local types. */
/*===========================================================================*/
/*===========================================================================*/
/* Module local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Module local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Module exported functions. */
/*===========================================================================*/
/**
* 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_t *ntp, thread_t *otp) {
(void)ntp; (void)otp;
asm volatile (
#if defined(WIN32)
".globl @port_switch@8 \n\t"
"@port_switch@8:"
#elif defined(__APPLE__)
".globl _port_switch \n\t"
"_port_switch:"
#else
".globl port_switch \n\t"
"port_switch:"
#endif
"push %ebp \n\t"
"push %esi \n\t"
"push %edi \n\t"
"push %ebx \n\t"
"movl %esp, 12(%edx) \n\t"
"movl 12(%ecx), %esp \n\t"
"pop %ebx \n\t"
"pop %edi \n\t"
"pop %esi \n\t"
"pop %ebp \n\t"
"ret");
}
/**
* @brief Start a thread by invoking its work function.
* @details If the work function returns @p chThdExit() is automatically
* invoked.
*/
__attribute__((cdecl, noreturn))
void _port_thread_start(msg_t (*pf)(void *), void *p) {
chSysUnlock();
pf(p);
chThdExit(0);
while(1);
}
/**
* @brief Returns the current value of the realtime counter.
*
* @return The realtime counter value.
*/
rtcnt_t port_rt_get_counter_value(void) {
#if defined(WIN32)
LARGE_INTEGER n;
QueryPerformanceCounter(&n);
return (rtcnt_t)(n.QuadPart / 1000LL);
#else
struct timeval tv;
gettimeofday(&tv, NULL);
return ((rtcnt_t)tv.tv_sec * (rtcnt_t)1000000) + (rtcnt_t)tv.tv_usec;
#endif
}
/** @} */
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