/* * linux/arch/m68k/kernel/ints.c -- Linux/m68k general interrupt handling code * * This file is subject to the terms and conditions of the GNU General Public * License.  See the file COPYING in the main directory of this archive * for more details. */ #include <linux/module.h>#include <linux/types.h>#include <linux/sched.h>#include <linux/interrupt.h>#include <linux/errno.h>#include <linux/init.h>#include <linux/irq.h> #include <asm/setup.h>#include <asm/irq.h>#include <asm/traps.h>#include <asm/page.h>#include <asm/machdep.h>#include <asm/cacheflush.h>#include <asm/irq_regs.h> #ifdef CONFIG_Q40#include <asm/q40ints.h>#endif #include "ints.h" extern u32 auto_irqhandler_fixup[];extern u16 user_irqvec_fixup[]; static int m68k_first_user_vec; static struct irq_chip auto_irq_chip = {	.name		= "auto",	.irq_startup	= m68k_irq_startup,	.irq_shutdown	= m68k_irq_shutdown,}; static struct irq_chip user_irq_chip = {	.name		= "user",	.irq_startup	= m68k_irq_startup,	.irq_shutdown	= m68k_irq_shutdown,}; /* * void init_IRQ(void) * * Parameters:	None * * Returns:	Nothing * * This function should be called during kernel startup to initialize * the IRQ handling routines. */ void __init init_IRQ(void){	int i; 	for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++)		irq_set_chip_and_handler(i, &auto_irq_chip, handle_simple_irq); 	mach_init_IRQ();} /** * m68k_setup_auto_interrupt * @handler: called from auto vector interrupts * * setup the handler to be called from auto vector interrupts instead of the * standard do_IRQ(), it will be called with irq numbers in the range * from IRQ_AUTO_1 - IRQ_AUTO_7. */void __init m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *)){	if (handler)		*auto_irqhandler_fixup = (u32)handler;	flush_icache();} /** * m68k_setup_user_interrupt * @vec: first user vector interrupt to handle * @cnt: number of active user vector interrupts * * setup user vector interrupts, this includes activating the specified range * of interrupts, only then these interrupts can be requested (note: this is * different from auto vector interrupts). */void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt){	int i; 	BUG_ON(IRQ_USER + cnt > NR_IRQS);	m68k_first_user_vec = vec;	for (i = 0; i < cnt; i++)		irq_set_chip_and_handler(i, &user_irq_chip, handle_simple_irq);	*user_irqvec_fixup = vec - IRQ_USER;	flush_icache();} /** * m68k_setup_irq_controller * @chip: irq chip which controls specified irq * @handle: flow handler which handles specified irq * @irq: first irq to be managed by the controller * @cnt: number of irqs to be managed by the controller * * Change the controller for the specified range of irq, which will be used to * manage these irq. auto/user irq already have a default controller, which can * be changed as well, but the controller probably should use m68k_irq_startup/ * m68k_irq_shutdown. */void m68k_setup_irq_controller(struct irq_chip *chip,			       irq_flow_handler_t handle, unsigned int irq,			       unsigned int cnt){	int i; 	for (i = 0; i < cnt; i++) {		irq_set_chip(irq + i, chip);		if (handle)			irq_set_handler(irq + i, handle);	}} unsigned int m68k_irq_startup_irq(unsigned int irq){	if (irq <= IRQ_AUTO_7)		vectors[VEC_SPUR + irq] = auto_inthandler;	else		vectors[m68k_first_user_vec + irq - IRQ_USER] = user_inthandler;	return 0;} unsigned int m68k_irq_startup(struct irq_data *data){	return m68k_irq_startup_irq(data->irq);} void m68k_irq_shutdown(struct irq_data *data){	unsigned int irq = data->irq; 	if (irq <= IRQ_AUTO_7)		vectors[VEC_SPUR + irq] = bad_inthandler;	else		vectors[m68k_first_user_vec + irq - IRQ_USER] = bad_inthandler;}  unsigned int irq_canonicalize(unsigned int irq){#ifdef CONFIG_Q40	if (MACH_IS_Q40 && irq == 11)		irq = 10;#endif	return irq;} EXPORT_SYMBOL(irq_canonicalize);  asmlinkage void handle_badint(struct pt_regs *regs){	atomic_inc(&irq_err_count);	pr_warn("unexpected interrupt from %u\n", regs->vector);}