git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1462 35acf78f-673a-0410-8e92-d51de3d6d3f4
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gdisirio
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66df09b63b
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/*
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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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@ -1,209 +0,0 @@
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/*
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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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/**
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* @addtogroup WIN32SIM_CORE
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* @{
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*/
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#ifndef _CHCORE_H_
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#define _CHCORE_H_
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/**
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* Macro defining the a simulated architecture into Win32.
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*/
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#define CH_ARCHITECTURE_WIN32SIM
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/**
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* Name of the implemented architecture.
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*/
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#define CH_ARCHITECTURE_NAME "WIN32 Simulator"
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/**
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* 32 bit stack alignment.
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*/
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typedef uint32_t stkalign_t;
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/**
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* Generic x86 register.
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*/
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typedef void *regx86;
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/**
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* Interrupt saved context.
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* This structure represents the stack frame saved during a preemption-capable
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* interrupt handler.
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*/
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struct extctx {
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};
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/**
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* System saved context.
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* @note In this demo the floating point registers are not saved.
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*/
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struct intctx {
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regx86 ebx;
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regx86 edi;
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regx86 esi;
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regx86 ebp;
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regx86 eip;
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};
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/**
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* Platform dependent part of the @p Thread structure.
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* This structure usually contains just the saved stack pointer defined as a
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* pointer to a @p intctx structure.
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*/
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struct context {
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struct intctx volatile *esp;
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};
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#define APUSH(p, a) (p) -= sizeof(void *), *(void **)(p) = (void*)(a)
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/**
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* Platform dependent part of the @p chThdInit() API.
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* This code usually setup the context switching frame represented by a
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* @p intctx structure.
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*/
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#define SETUP_CONTEXT(workspace, wsize, pf, arg) { \
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uint8_t *esp = (uint8_t *)workspace + wsize; \
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APUSH(esp, arg); \
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APUSH(esp, threadexit); \
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esp -= sizeof(struct intctx); \
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((struct intctx *)esp)->eip = pf; \
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((struct intctx *)esp)->ebx = 0; \
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((struct intctx *)esp)->edi = 0; \
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((struct intctx *)esp)->esi = 0; \
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((struct intctx *)esp)->ebp = 0; \
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tp->p_ctx.esp = (struct intctx *)esp; \
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}
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/**
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* Stack size for the system idle thread.
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*/
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#ifndef IDLE_THREAD_STACK_SIZE
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#define IDLE_THREAD_STACK_SIZE 256
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#endif
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/**
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* Per-thread stack overhead for interrupts servicing, it is used in the
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* calculation of the correct working area size.
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*/
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#ifndef INT_REQUIRED_STACK
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#define INT_REQUIRED_STACK 0x8000
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#endif
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/**
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* Enforces a correct alignment for a stack area size value.
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*/
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#define STACK_ALIGN(n) ((((n) - 1) | (sizeof(stkalign_t) - 1)) + 1)
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/**
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* Computes the thread working area global size.
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*/
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#define THD_WA_SIZE(n) STACK_ALIGN(sizeof(Thread) + \
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sizeof(void *) * 2 + \
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sizeof(struct intctx) + \
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sizeof(struct extctx) + \
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(n) + (INT_REQUIRED_STACK))
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/**
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* Macro used to allocate a thread working area aligned as both position and
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* size.
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*/
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#define WORKING_AREA(s, n) stkalign_t s[THD_WA_SIZE(n) / sizeof(stkalign_t)];
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/**
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* IRQ prologue code, inserted at the start of all IRQ handlers enabled to
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* invoke system APIs.
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*/
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#define PORT_IRQ_PROLOGUE()
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/**
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* IRQ epilogue code, inserted at the end of all IRQ handlers enabled to
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* invoke system APIs.
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*/
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#define PORT_IRQ_EPILOGUE()
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/**
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* IRQ handler function declaration.
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*/
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#define PORT_IRQ_HANDLER(id) void id(void)
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/**
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* Simulator initialization.
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*/
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#define port_init() _init_core()
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/**
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* Does nothing in this simulator.
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*/
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#define port_lock()
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/**
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* Does nothing in this simulator.
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*/
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#define port_unlock()
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/**
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* Does nothing in this simulator.
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*/
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#define port_lock_from_isr()
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/**
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* Does nothing in this simulator.
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*/
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#define port_unlock_from_isr()
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/**
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* Does nothing in this simulator.
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*/
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#define port_disable()
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/**
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* Does nothing in this simulator.
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*/
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#define port_suspend()
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/**
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* Does nothing in this simulator.
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*/
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#define port_enable()
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/**
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* In the simulator this does a polling pass on the simulated interrupt
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* sources.
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*/
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#define port_wait_for_interrupt() ChkIntSources()
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#ifdef __cplusplus
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extern "C" {
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#endif
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__attribute__((fastcall)) void port_switch(Thread *otp, Thread *ntp);
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__attribute__((fastcall)) void port_halt(void);
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void _init_core(void);
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void ChkIntSources(void);
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void threadexit(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _CHCORE_H_ */
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/** @} */
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