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/*
* Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
* Derived (i.e. mostly copied) from arch/i386/kernel/irq.c:
* Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
*/
#include "linux/config.h"
#include "linux/kernel.h"
#include "linux/module.h"
#include "linux/smp.h"
#include "linux/kernel_stat.h"
#include "linux/interrupt.h"
#include "linux/random.h"
#include "linux/slab.h"
#include "linux/file.h"
#include "linux/proc_fs.h"
#include "linux/init.h"
#include "linux/seq_file.h"
#include "linux/profile.h"
#include "linux/hardirq.h"
#include "asm/irq.h"
#include "asm/hw_irq.h"
#include "asm/atomic.h"
#include "asm/signal.h"
#include "asm/system.h"
#include "asm/errno.h"
#include "asm/uaccess.h"
#include "user_util.h"
#include "kern_util.h"
#include "irq_user.h"
#include "irq_kern.h"
#include "os.h"
/*
* Generic, controller-independent functions:
*/
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v, j;
struct irqaction * action;
unsigned long flags;
if (i == 0) {
seq_printf(p, " ");
for_each_online_cpu(j)
seq_printf(p, "CPU%d ",j);
seq_putc(p, '\n');
}
if (i < NR_IRQS) {
spin_lock_irqsave(&irq_desc[i].lock, flags);
action = irq_desc[i].action;
if (!action)
goto skip;
seq_printf(p, "%3d: ",i);
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
seq_printf(p, " %14s", irq_desc[i].handler->typename);
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)
seq_printf(p, ", %s", action->name);
seq_putc(p, '\n');
skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
} else if (i == NR_IRQS) {
seq_putc(p, '\n');
}
return 0;
}
/*
* do_IRQ handles all normal device IRQ's (the special
* SMP cross-CPU interrupts have their own specific
* handlers).
*/
unsigned int do_IRQ(int irq, union uml_pt_regs *regs)
{
irq_enter();
__do_IRQ(irq, (struct pt_regs *) regs);
irq_exit();
return 1;
}
int um_request_irq(unsigned int irq, int fd, int type,
irqreturn_t (*handler)(int, void *, struct pt_regs *),
unsigned long irqflags, const char * devname,
void *dev_id)
{
int err;
err = request_irq(irq, handler, irqflags, devname, dev_id);
if(err)
return(err);
if(fd != -1)
err = activate_fd(irq, fd, type, dev_id);
return(err);
}
EXPORT_SYMBOL(um_request_irq);
EXPORT_SYMBOL(reactivate_fd);
static DEFINE_SPINLOCK(irq_spinlock);
unsigned long irq_lock(void)
{
unsigned long flags;
spin_lock_irqsave(&irq_spinlock, flags);
return(flags);
}
void irq_unlock(unsigned long flags)
{
spin_unlock_irqrestore(&irq_spinlock, flags);
}
/* hw_interrupt_type must define (startup || enable) &&
* (shutdown || disable) && end */
static void dummy(unsigned int irq)
{
}
/* This is used for everything else than the timer. */
static struct hw_interrupt_type normal_irq_type = {
.typename = "SIGIO",
.release = free_irq_by_irq_and_dev,
.disable = dummy,
.enable = dummy,
.ack = dummy,
.end = dummy
};
static struct hw_interrupt_type SIGVTALRM_irq_type = {
.typename = "SIGVTALRM",
.release = free_irq_by_irq_and_dev,
.shutdown = dummy, /* never called */
.disable = dummy,
.enable = dummy,
.ack = dummy,
.end = dummy
};
void __init init_IRQ(void)
{
int i;
irq_desc[TIMER_IRQ].status = IRQ_DISABLED;
irq_desc[TIMER_IRQ].action = NULL;
irq_desc[TIMER_IRQ].depth = 1;
irq_desc[TIMER_IRQ].handler = &SIGVTALRM_irq_type;
enable_irq(TIMER_IRQ);
for(i=1;i<NR_IRQS;i++){
irq_desc[i].status = IRQ_DISABLED;
irq_desc[i].action = NULL;
irq_desc[i].depth = 1;
irq_desc[i].handler = &normal_irq_type;
enable_irq(i);
}
}
int init_aio_irq(int irq, char *name, irqreturn_t (*handler)(int, void *,
struct pt_regs *))
{
int fds[2], err;
err = os_pipe(fds, 1, 1);
if(err){
printk("init_aio_irq - os_pipe failed, err = %d\n", -err);
goto out;
}
err = um_request_irq(irq, fds[0], IRQ_READ, handler,
SA_INTERRUPT | SA_SAMPLE_RANDOM, name,
(void *) (long) fds[0]);
if(err){
printk("init_aio_irq - : um_request_irq failed, err = %d\n",
err);
goto out_close;
}
err = fds[1];
goto out;
out_close:
os_close_file(fds[0]);
os_close_file(fds[1]);
out:
return(err);
}
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