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authorMichael Ellerman <michael@ellerman.id.au>2007-06-04 23:00:00 +1000
committerPaul Mackerras <paulus@samba.org>2007-06-25 17:02:07 +1000
commitee51de5645edee4124db6a479d2e135ebe436748 (patch)
treeac1ceab5d8051ca458b8a5f94377eec899dc97cc /arch/powerpc
parent6fde40f3f1a9641ea0a41471cea77f34c0cbb36f (diff)
[POWERPC] Add irq_create_direct_mapping()
This patch adds irq_create_direct_mapping(). This routine is an alternative to irq_create_mapping(), for irq controllers that can use linux virq numbers directly as hardware numbers. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/irq.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index d806b18d9ff..a3351561d28 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -616,6 +616,30 @@ static int irq_setup_virq(struct irq_host *host, unsigned int virq,
return 0;
}
+unsigned int irq_create_direct_mapping(struct irq_host *host)
+{
+ unsigned int virq;
+
+ if (host == NULL)
+ host = irq_default_host;
+
+ BUG_ON(host == NULL);
+ WARN_ON(host->revmap_type != IRQ_HOST_MAP_NOMAP);
+
+ virq = irq_alloc_virt(host, 1, 0);
+ if (virq == NO_IRQ) {
+ pr_debug("irq: create_direct virq allocation failed\n");
+ return NO_IRQ;
+ }
+
+ pr_debug("irq: create_direct obtained virq %d\n", virq);
+
+ if (irq_setup_virq(host, virq, virq))
+ return NO_IRQ;
+
+ return virq;
+}
+
unsigned int irq_create_mapping(struct irq_host *host,
irq_hw_number_t hwirq)
{