95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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*
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2010 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief Cortex-M3 architecture's entry point
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*
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* \author Andrea Righi <arighi@develer.com>
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*/
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#include "cfg/cfg_proc.h" /* CONFIG_KERN_PREEMPT */
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#include "switch_ctx_cm3.h"
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#include <cfg/compiler.h>
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#include <cfg/debug.h>
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#include <cpu/attr.h> /* PAUSE */
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#include <cpu/irq.h> /* IRQ_DISABLE */
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#include <cpu/types.h>
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#include <drv/irq_cm3.h>
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#include <drv/clock_cm3.h>
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#include <kern/proc_p.h>
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#include <io/cm3.h>
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#ifndef __IAR_SYSTEMS_ICC__
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extern size_t __text_end, __data_start, __data_end, __bss_start, __bss_end;
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#endif
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extern void __init2(void);
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/* Architecture's entry point */
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void __init2(void)
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{
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/*
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* The main application expects IRQs disabled.
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*/
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IRQ_DISABLE;
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/* Set the appropriate clocking configuration */
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clock_init();
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/* Initialize IRQ vector table in RAM */
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sysirq_init();
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#if (CONFIG_KERN && CONFIG_KERN_PREEMPT)
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/*
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* Voluntary context switch handler.
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*
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* This software interrupt can always be triggered and must be
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* dispatched as soon as possible, thus we just disable IRQ priority
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* for it.
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*/
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sysirq_setHandler(FAULT_SVCALL, svcall_handler);
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sysirq_setPriority(FAULT_SVCALL, IRQ_PRIO_MAX);
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/*
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* Preemptible context switch handler
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*
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* The priority of this IRQ must be the lowest priority in the system
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* in order to run last in the interrupt service routines' chain.
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*/
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sysirq_setHandler(FAULT_PENDSV, pendsv_handler);
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sysirq_setPriority(FAULT_PENDSV, IRQ_PRIO_MIN);
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#endif
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}
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