/*
- * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.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/kernel.h"
-#include "linux/module.h"
-#include "linux/smp.h"
-#include "linux/kernel_stat.h"
+#include "linux/cpumask.h"
+#include "linux/hardirq.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/kernel_stat.h"
+#include "linux/module.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 "as-layout.h"
#include "kern_util.h"
-#include "irq_user.h"
-#include "irq_kern.h"
#include "os.h"
-#include "sigio.h"
-#include "misc_constants.h"
-#include "as-layout.h"
/*
* Generic, controller-independent functions:
seq_putc(p, '\n');
skip:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
- } else if (i == NR_IRQS) {
+ } else if (i == NR_IRQS)
seq_putc(p, '\n');
- }
return 0;
}
extern void free_irqs(void);
-void sigio_handler(int sig, union uml_pt_regs *regs)
+void sigio_handler(int sig, struct uml_pt_regs *regs)
{
struct irq_fd *irq_fd;
int n;
while (1) {
n = os_waiting_for_events(active_fds);
if (n <= 0) {
- if(n == -EINTR) continue;
+ if (n == -EINTR)
+ continue;
else break;
}
- for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
+ for (irq_fd = active_fds; irq_fd != NULL;
+ irq_fd = irq_fd->next) {
if (irq_fd->current_events != 0) {
irq_fd->current_events = 0;
do_IRQ(irq_fd->irq, regs);
if (type == IRQ_READ)
events = UM_POLLIN | UM_POLLPRI;
- else
- events = UM_POLLOUT;
+ else events = UM_POLLOUT;
*new_fd = ((struct irq_fd) { .next = NULL,
.id = dev_id,
.fd = fd,
spin_lock_irqsave(&irq_lock, flags);
for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
if ((irq_fd->fd == fd) && (irq_fd->type == type)) {
- printk("Registering fd %d twice\n", fd);
- printk("Irqs : %d, %d\n", irq_fd->irq, irq);
- printk("Ids : 0x%p, 0x%p\n", irq_fd->id, dev_id);
+ printk(KERN_ERR "Registering fd %d twice\n", fd);
+ printk(KERN_ERR "Irqs : %d, %d\n", irq_fd->irq, irq);
+ printk(KERN_ERR "Ids : 0x%p, 0x%p\n", irq_fd->id,
+ dev_id);
goto out_unlock;
}
}
if (n == 0)
break;
- /* n > 0
+ /*
+ * n > 0
* It means we couldn't put new pollfd to current pollfds
* and tmp_fds is NULL or too small for new pollfds array.
* Needed size is equal to n as minimum.
spin_unlock_irqrestore(&irq_lock, flags);
- /* This calls activate_fd, so it has to be outside the critical
+ /*
+ * This calls activate_fd, so it has to be outside the critical
* section.
*/
maybe_sigio_broken(fd, (type == IRQ_READ));
i++;
}
if (irq == NULL) {
- printk("find_irq_by_fd doesn't have descriptor %d\n", fd);
+ printk(KERN_ERR "find_irq_by_fd doesn't have descriptor %d\n",
+ fd);
goto out;
}
fdi = os_get_pollfd(i);
if ((fdi != -1) && (fdi != fd)) {
- printk("find_irq_by_fd - mismatch between active_fds and "
- "pollfds, fd %d vs %d, need %d\n", irq->fd,
+ printk(KERN_ERR "find_irq_by_fd - mismatch between active_fds "
+ "and pollfds, fd %d vs %d, need %d\n", irq->fd,
fdi, fd);
irq = NULL;
goto out;
spin_lock_irqsave(&irq_lock, flags);
irq = find_irq_by_fd(fd, irqnum, &i);
- if(irq == NULL){
+ if (irq == NULL) {
spin_unlock_irqrestore(&irq_lock, flags);
return;
}
return 0;
}
-#ifdef CONFIG_MODE_TT
-void forward_interrupts(int pid)
-{
- struct irq_fd *irq;
- unsigned long flags;
- int err;
-
- spin_lock_irqsave(&irq_lock, flags);
- for (irq = active_fds; irq != NULL; irq = irq->next) {
- err = os_set_owner(irq->fd, pid);
- if (err < 0) {
- /* XXX Just remove the irq rather than
- * print out an infinite stream of these
- */
- printk("Failed to forward %d to pid %d, err = %d\n",
- irq->fd, pid, -err);
- }
-
- irq->pid = pid;
- }
- spin_unlock_irqrestore(&irq_lock, flags);
-}
-#endif
-
/*
- * do_IRQ handles all normal device IRQ's (the special
+ * do_IRQ handles all normal device IRQs (the special
* SMP cross-CPU interrupts have their own specific
* handlers).
*/
-unsigned int do_IRQ(int irq, union uml_pt_regs *regs)
+unsigned int do_IRQ(int irq, struct uml_pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs((struct pt_regs *)regs);
irq_enter();
EXPORT_SYMBOL(um_request_irq);
EXPORT_SYMBOL(reactivate_fd);
-/* hw_interrupt_type must define (startup || enable) &&
- * (shutdown || disable) && end */
+/*
+ * hw_interrupt_type must define (startup || enable) &&
+ * (shutdown || disable) && end
+ */
static void dummy(unsigned int irq)
{
}
err = os_pipe(fds, 1, 1);
if (err) {
- printk("init_aio_irq - os_pipe failed, err = %d\n", -err);
+ printk(KERN_ERR "init_aio_irq - os_pipe failed, err = %d\n",
+ -err);
goto out;
}
IRQF_DISABLED | IRQF_SAMPLE_RANDOM, name,
(void *) (long) fds[0]);
if (err) {
- printk("init_aio_irq - : um_request_irq failed, err = %d\n",
+ printk(KERN_ERR "init_aio_irq - : um_request_irq failed, "
+ "err = %d\n",
err);
goto out_close;
}
static unsigned long pending_mask;
-unsigned long to_irq_stack(int sig, unsigned long *mask_out)
+unsigned long to_irq_stack(unsigned long *mask_out)
{
struct thread_info *ti;
unsigned long mask, old;
int nested;
- mask = xchg(&pending_mask, 1 << sig);
- if(mask != 0){
- /* If any interrupts come in at this point, we want to
+ mask = xchg(&pending_mask, *mask_out);
+ if (mask != 0) {
+ /*
+ * If any interrupts come in at this point, we want to
* make sure that their bits aren't lost by our
* putting our bit in. So, this loop accumulates bits
* until xchg returns the same value that we put in.
* and pending_mask contains a bit for each interrupt
* that came in.
*/
- old = 1 << sig;
+ old = *mask_out;
do {
old |= mask;
mask = xchg(&pending_mask, old);
- } while(mask != old);
+ } while (mask != old);
return 1;
}
ti = current_thread_info();
nested = (ti->real_thread != NULL);
- if(!nested){
+ if (!nested) {
struct task_struct *task;
struct thread_info *tti;
task = cpu_tasks[ti->cpu].task;
tti = task_thread_info(task);
+
*ti = *tti;
ti->real_thread = tti;
task->stack = ti;
Code Review / linux-2.6.git / blobdiff