mirror of https://github.com/rusefi/ChibiOS.git
145 lines
4.8 KiB
C
145 lines
4.8 KiB
C
/*
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ChibiOS - Copyright (C) 2006,2007,2008,2009,2010,2011,2012,2013,2014,
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2015,2016,2017,2018,2019,2020,2021 Giovanni Di Sirio.
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This file is part of ChibiOS.
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ChibiOS 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 version 3 of the License.
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ChibiOS 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 SIMIA32/chcore.c
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* @brief Simulator on IA32 port code.
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*
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* @addtogroup SIMIA32_GCC_CORE
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* @{
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*/
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#if defined(WIN32)
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#include <windows.h>
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#else
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#include <sys/time.h>
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#endif
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#include "ch.h"
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/*===========================================================================*/
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/* Module local definitions. */
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/*===========================================================================*/
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/*
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* RTOS-specific context offset.
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*/
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#if defined(_CHIBIOS_RT_CONF_)
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#define CONTEXT_OFFSET "12"
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#elif defined(_CHIBIOS_NIL_CONF_)
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#define CONTEXT_OFFSET "0"
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#else
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#error "invalid chconf.h"
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#endif
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/*===========================================================================*/
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/* Module exported variables. */
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/*===========================================================================*/
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bool port_isr_context_flag;
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syssts_t port_irq_sts;
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/*===========================================================================*/
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/* Module local types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module local variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module exported functions. */
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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_t *ntp, thread_t *otp) {
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(void)ntp; (void)otp;
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asm volatile (
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#if defined(WIN32)
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".globl @port_switch@8 \n\t"
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"@port_switch@8:"
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#elif defined(__APPLE__)
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".globl _port_switch \n\t"
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"_port_switch:"
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#else
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".globl port_switch \n\t"
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"port_switch:"
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#endif
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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, "CONTEXT_OFFSET"(%edx) \n\t"
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"movl "CONTEXT_OFFSET"(%ecx), %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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* @brief Start a thread by invoking its work function.
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* @details If the work function returns @p chThdExit() is automatically
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* invoked.
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*/
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__attribute__((cdecl, noreturn))
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void _port_thread_start(msg_t (*pf)(void *), void *p) {
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chSysUnlock();
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pf(p);
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chThdExit(0);
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while(1);
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}
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/**
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* @brief Returns the current value of the realtime counter.
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*
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* @return The realtime counter value.
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*/
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rtcnt_t port_rt_get_counter_value(void) {
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#if defined(WIN32)
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LARGE_INTEGER n;
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QueryPerformanceCounter(&n);
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return (rtcnt_t)(n.QuadPart / 1000LL);
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#else
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return ((rtcnt_t)tv.tv_sec * (rtcnt_t)1000000) + (rtcnt_t)tv.tv_usec;
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#endif
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}
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/** @} */
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