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Diffstat (limited to 'arch/powerpc/kernel/irq.c')
-rw-r--r--arch/powerpc/kernel/irq.c98
1 files changed, 82 insertions, 16 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 24bea97c736..2250f9e6c5c 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -52,6 +52,7 @@
#include <linux/mutex.h>
#include <linux/bootmem.h>
#include <linux/pci.h>
+#include <linux/debugfs.h>
#include <asm/uaccess.h>
#include <asm/system.h>
@@ -272,7 +273,7 @@ void do_IRQ(struct pt_regs *regs)
struct thread_info *curtp, *irqtp;
#endif
- irq_enter();
+ irq_enter();
#ifdef CONFIG_DEBUG_STACKOVERFLOW
/* Debugging check for stack overflow: is there less than 2KB free? */
@@ -321,7 +322,7 @@ void do_IRQ(struct pt_regs *regs)
/* That's not SMP safe ... but who cares ? */
ppc_spurious_interrupts++;
- irq_exit();
+ irq_exit();
set_irq_regs(old_regs);
#ifdef CONFIG_PPC_ISERIES
@@ -395,7 +396,6 @@ void do_softirq(void)
local_irq_restore(flags);
}
-EXPORT_SYMBOL(do_softirq);
/*
@@ -418,10 +418,16 @@ irq_hw_number_t virq_to_hw(unsigned int virq)
}
EXPORT_SYMBOL_GPL(virq_to_hw);
-__init_refok struct irq_host *irq_alloc_host(unsigned int revmap_type,
- unsigned int revmap_arg,
- struct irq_host_ops *ops,
- irq_hw_number_t inval_irq)
+static int default_irq_host_match(struct irq_host *h, struct device_node *np)
+{
+ return h->of_node != NULL && h->of_node == np;
+}
+
+struct irq_host *irq_alloc_host(struct device_node *of_node,
+ unsigned int revmap_type,
+ unsigned int revmap_arg,
+ struct irq_host_ops *ops,
+ irq_hw_number_t inval_irq)
{
struct irq_host *host;
unsigned int size = sizeof(struct irq_host);
@@ -432,13 +438,7 @@ __init_refok struct irq_host *irq_alloc_host(unsigned int revmap_type,
/* Allocate structure and revmap table if using linear mapping */
if (revmap_type == IRQ_HOST_MAP_LINEAR)
size += revmap_arg * sizeof(unsigned int);
- if (mem_init_done)
- host = kzalloc(size, GFP_KERNEL);
- else {
- host = alloc_bootmem(size);
- if (host)
- memset(host, 0, size);
- }
+ host = zalloc_maybe_bootmem(size, GFP_KERNEL);
if (host == NULL)
return NULL;
@@ -446,6 +446,10 @@ __init_refok struct irq_host *irq_alloc_host(unsigned int revmap_type,
host->revmap_type = revmap_type;
host->inval_irq = inval_irq;
host->ops = ops;
+ host->of_node = of_node;
+
+ if (host->ops->match == NULL)
+ host->ops->match = default_irq_host_match;
spin_lock_irqsave(&irq_big_lock, flags);
@@ -477,7 +481,7 @@ __init_refok struct irq_host *irq_alloc_host(unsigned int revmap_type,
host->inval_irq = 0;
/* setup us as the host for all legacy interrupts */
for (i = 1; i < NUM_ISA_INTERRUPTS; i++) {
- irq_map[i].hwirq = 0;
+ irq_map[i].hwirq = i;
smp_wmb();
irq_map[i].host = host;
smp_wmb();
@@ -521,7 +525,7 @@ struct irq_host *irq_find_host(struct device_node *node)
*/
spin_lock_irqsave(&irq_big_lock, flags);
list_for_each_entry(h, &irq_hosts, link)
- if (h->ops->match == NULL || h->ops->match(h, node)) {
+ if (h->ops->match(h, node)) {
found = h;
break;
}
@@ -996,6 +1000,68 @@ static int irq_late_init(void)
}
arch_initcall(irq_late_init);
+#ifdef CONFIG_VIRQ_DEBUG
+static int virq_debug_show(struct seq_file *m, void *private)
+{
+ unsigned long flags;
+ irq_desc_t *desc;
+ const char *p;
+ char none[] = "none";
+ int i;
+
+ seq_printf(m, "%-5s %-7s %-15s %s\n", "virq", "hwirq",
+ "chip name", "host name");
+
+ for (i = 1; i < NR_IRQS; i++) {
+ desc = get_irq_desc(i);
+ spin_lock_irqsave(&desc->lock, flags);
+
+ if (desc->action && desc->action->handler) {
+ seq_printf(m, "%5d ", i);
+ seq_printf(m, "0x%05lx ", virq_to_hw(i));
+
+ if (desc->chip && desc->chip->typename)
+ p = desc->chip->typename;
+ else
+ p = none;
+ seq_printf(m, "%-15s ", p);
+
+ if (irq_map[i].host && irq_map[i].host->of_node)
+ p = irq_map[i].host->of_node->full_name;
+ else
+ p = none;
+ seq_printf(m, "%s\n", p);
+ }
+
+ spin_unlock_irqrestore(&desc->lock, flags);
+ }
+
+ return 0;
+}
+
+static int virq_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, virq_debug_show, inode->i_private);
+}
+
+static const struct file_operations virq_debug_fops = {
+ .open = virq_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init irq_debugfs_init(void)
+{
+ if (debugfs_create_file("virq_mapping", S_IRUGO, powerpc_debugfs_root,
+ NULL, &virq_debug_fops))
+ return -ENOMEM;
+
+ return 0;
+}
+__initcall(irq_debugfs_init);
+#endif /* CONFIG_VIRQ_DEBUG */
+
#endif /* CONFIG_PPC_MERGE */
#ifdef CONFIG_PPC64