irq.c

linux-2.4.29操作系统的源码

/*
 * Copyright (C) 2003 PMC-Sierra Inc.
 * Author: Manish Lachwani ([e-mail])
 *
 *  This program 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 2 of the  License, or (at your
 *  option) any later version.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/timex.h>
#include <linux/slab.h>
#include <asm/bootinfo.h>
#include <asm/mipsregs.h>

static spinlock_t irq_lock = SPIN_LOCK_UNLOCKED;

extern asmlinkage void big_sur_handle_int(void);
extern void big_sur_irq_init(void);

void __init init_IRQ(void)
{
	/*
	 * Clear all of the interrupts while we change the able around a bit.
	 * int-handler is not on bootstrap
	 */
	clear_c0_status(ST0_IM);

	/* Sets the first-level interrupt dispatcher. */
	set_except_vector(0, big_sur_handle_int);
	init_generic_irq();

	mips_cpu_irq_init(0);
	big_sur_irq_init();

#ifdef CONFIG_REMOTE_DEBUG
	printk("start kgdb ...\n");
	set_debug_traps();
	breakpoint();	/* you may move this line to whereever you want :-) */
#endif
#ifdef CONFIG_GDB_CONSOLE
	register_gdb_console();
#endif
}