Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ee51de5645edee4124db6a479d2e135ebe436748
Commit: ee51de5645edee4124db6a479d2e135ebe436748
Parent: 6fde40f3f1a9641ea0a41471cea77f34c0cbb36f
Author: Michael Ellerman <[EMAIL PROTECTED]>
AuthorDate: Mon Jun 4 23:00:00 2007 +1000
Committer: Paul Mackerras <[EMAIL PROTECTED]>
CommitDate: Mon Jun 25 17:02:07 2007 +1000
[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 <[EMAIL PROTECTED]>
Acked-by: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
Signed-off-by: Paul Mackerras <[EMAIL PROTECTED]>
---
arch/powerpc/kernel/irq.c | 24 ++++++++++++++++++++++++
include/asm-powerpc/irq.h | 9 +++++++++
2 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index d806b18..a335156 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)
{
diff --git a/include/asm-powerpc/irq.h b/include/asm-powerpc/irq.h
index 05dd5a3..0485c53 100644
--- a/include/asm-powerpc/irq.h
+++ b/include/asm-powerpc/irq.h
@@ -223,6 +223,15 @@ extern void irq_dispose_mapping(unsigned int virq);
extern unsigned int irq_find_mapping(struct irq_host *host,
irq_hw_number_t hwirq);
+/**
+ * irq_create_direct_mapping - Allocate a virq for direct mapping
+ * @host: host to allocate the virq for or NULL for default host
+ *
+ * This routine is used for irq controllers which can choose the hardware
+ * interrupt numbers they generate. In such a case it's simplest to use
+ * the linux virq as the hardware interrupt number.
+ */
+extern unsigned int irq_create_direct_mapping(struct irq_host *host);
/**
* irq_radix_revmap - Find a linux virq from a hw irq number.
-
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