127 lines
3.5 KiB
C
127 lines
3.5 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 <windows.h>
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#include <stdio.h>
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#undef CDECL
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/**
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* @addtogroup WIN32SIM_CORE
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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static LARGE_INTEGER nextcnt;
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static LARGE_INTEGER slice;
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/*
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* Simulated HW initialization.
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*/
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void InitCore(void) {
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WSADATA wsaData;
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// Initialization.
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if (WSAStartup(2, &wsaData) != 0) {
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printf("Unable to locate a winsock DLL\n");
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exit(1);
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}
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printf("Win32 ChibiOS/RT simulator\n\n");
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printf("Thread structure %d bytes\n", sizeof(Thread));
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if (!QueryPerformanceFrequency(&slice)) {
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printf("QueryPerformanceFrequency() error");
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exit(1);
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}
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printf("Core Frequency %u Hz\n", (int)slice.LowPart);
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slice.QuadPart /= CH_FREQUENCY;
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QueryPerformanceCounter(&nextcnt);
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nextcnt.QuadPart += slice.QuadPart;
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sdInit();
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fflush(stdout);
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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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LARGE_INTEGER n;
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if (sd_lld_interrupt_pending()) {
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if (chSchIsRescRequiredExI())
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chSchDoRescheduleI();
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return;
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}
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// Interrupt Timer simulation (10ms interval).
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QueryPerformanceCounter(&n);
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if (n.QuadPart > nextcnt.QuadPart) {
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nextcnt.QuadPart += slice.QuadPart;
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chSysTimerHandlerI();
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if (chSchIsRescRequiredExI())
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chSchDoRescheduleI();
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}
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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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(void)otp; (void)ntp;
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asm volatile (".globl @port_switch@8 \n\t" \
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"@port_switch@8: \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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