2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* 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>
|
2007-02-18 05:22:39 +00:00
|
|
|
#include <linux/interrupt.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
#include <linux/kernel_stat.h>
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
|
|
|
|
#include <asm/setup.h>
|
|
|
|
#include <asm/system.h>
|
|
|
|
#include <asm/irq.h>
|
|
|
|
#include <asm/traps.h>
|
|
|
|
#include <asm/page.h>
|
|
|
|
#include <asm/machdep.h>
|
2006-06-25 12:47:01 +00:00
|
|
|
#include <asm/cacheflush.h>
|
2006-10-07 13:16:45 +00:00
|
|
|
#include <asm/irq_regs.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
#ifdef CONFIG_Q40
|
|
|
|
#include <asm/q40ints.h>
|
|
|
|
#endif
|
|
|
|
|
2006-06-25 12:47:01 +00:00
|
|
|
extern u32 auto_irqhandler_fixup[];
|
|
|
|
extern u16 user_irqvec_fixup[];
|
|
|
|
|
|
|
|
static int m68k_first_user_vec;
|
2006-06-25 12:47:00 +00:00
|
|
|
|
2011-04-13 20:31:28 +00:00
|
|
|
static struct irq_chip auto_irq_chip = {
|
2006-06-25 12:47:00 +00:00
|
|
|
.name = "auto",
|
2011-04-13 20:31:28 +00:00
|
|
|
.irq_startup = m68k_irq_startup,
|
|
|
|
.irq_shutdown = m68k_irq_shutdown,
|
2006-06-25 12:47:00 +00:00
|
|
|
};
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2011-04-13 20:31:28 +00:00
|
|
|
static struct irq_chip user_irq_chip = {
|
2006-06-25 12:47:01 +00:00
|
|
|
.name = "user",
|
2011-04-13 20:31:28 +00:00
|
|
|
.irq_startup = m68k_irq_startup,
|
|
|
|
.irq_shutdown = m68k_irq_shutdown,
|
2005-04-16 22:20:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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;
|
|
|
|
|
2006-06-23 09:04:59 +00:00
|
|
|
/* assembly irq entry code relies on this... */
|
|
|
|
if (HARDIRQ_MASK != 0x00ff0000) {
|
|
|
|
extern void hardirq_mask_is_broken(void);
|
|
|
|
hardirq_mask_is_broken();
|
|
|
|
}
|
|
|
|
|
2006-06-25 12:47:01 +00:00
|
|
|
for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++)
|
2011-04-21 20:50:52 +00:00
|
|
|
irq_set_chip_and_handler(i, &auto_irq_chip, handle_simple_irq);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-06-25 12:47:01 +00:00
|
|
|
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
|
2011-07-01 18:39:19 +00:00
|
|
|
* standard do_IRQ(), it will be called with irq numbers in the range
|
2006-06-25 12:47:01 +00:00
|
|
|
* 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
|
2011-09-11 09:54:50 +00:00
|
|
|
* different from auto vector interrupts).
|
2006-06-25 12:47:01 +00:00
|
|
|
*/
|
2011-09-11 09:54:50 +00:00
|
|
|
void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt)
|
2006-06-25 12:47:01 +00:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
2008-11-14 07:10:19 +00:00
|
|
|
BUG_ON(IRQ_USER + cnt > NR_IRQS);
|
2006-06-25 12:47:01 +00:00
|
|
|
m68k_first_user_vec = vec;
|
|
|
|
for (i = 0; i < cnt; i++)
|
2011-05-27 20:33:41 +00:00
|
|
|
irq_set_chip(IRQ_USER + i, &user_irq_chip);
|
2006-06-25 12:47:01 +00:00
|
|
|
*user_irqvec_fixup = vec - IRQ_USER;
|
|
|
|
flush_icache();
|
|
|
|
}
|
|
|
|
|
2011-04-21 20:50:52 +00:00
|
|
|
/**
|
|
|
|
* 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);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-04-17 20:53:04 +00:00
|
|
|
unsigned int m68k_irq_startup_irq(unsigned int irq)
|
2006-06-25 12:47:00 +00:00
|
|
|
{
|
|
|
|
if (irq <= IRQ_AUTO_7)
|
|
|
|
vectors[VEC_SPUR + irq] = auto_inthandler;
|
2006-06-25 12:47:01 +00:00
|
|
|
else
|
|
|
|
vectors[m68k_first_user_vec + irq - IRQ_USER] = user_inthandler;
|
2006-06-25 12:47:00 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-04-17 20:53:04 +00:00
|
|
|
unsigned int m68k_irq_startup(struct irq_data *data)
|
2006-06-25 12:47:00 +00:00
|
|
|
{
|
2011-04-17 20:53:04 +00:00
|
|
|
return m68k_irq_startup_irq(data->irq);
|
|
|
|
}
|
|
|
|
|
|
|
|
void m68k_irq_shutdown(struct irq_data *data)
|
|
|
|
{
|
|
|
|
unsigned int irq = data->irq;
|
|
|
|
|
2006-06-25 12:47:00 +00:00
|
|
|
if (irq <= IRQ_AUTO_7)
|
|
|
|
vectors[VEC_SPUR + irq] = bad_inthandler;
|
2006-06-25 12:47:01 +00:00
|
|
|
else
|
|
|
|
vectors[m68k_first_user_vec + irq - IRQ_USER] = bad_inthandler;
|
2006-06-25 12:47:00 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2006-06-25 12:47:01 +00:00
|
|
|
unsigned int irq_canonicalize(unsigned int irq)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2006-06-25 12:47:01 +00:00
|
|
|
#ifdef CONFIG_Q40
|
|
|
|
if (MACH_IS_Q40 && irq == 11)
|
|
|
|
irq = 10;
|
|
|
|
#endif
|
|
|
|
return irq;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2006-06-25 12:47:01 +00:00
|
|
|
EXPORT_SYMBOL(irq_canonicalize);
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2011-04-21 20:50:52 +00:00
|
|
|
|
|
|
|
asmlinkage void handle_badint(struct pt_regs *regs)
|
|
|
|
{
|
|
|
|
atomic_inc(&irq_err_count);
|
|
|
|
pr_warn("unexpected interrupt from %u\n", regs->vector);
|
|
|
|
}
|