/*
* 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);
}
Messung V0.5 in Prozent C=95 H=68 G=82
¤ Dauer der Verarbeitung: 0.13 Sekunden
(vorverarbeitet am 2026-09-27)
¤
*© Formatika GbR, Deutschland