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authorStephen Rothwell <sfr@canb.auug.org.au>2006-04-04 14:49:48 +1000
committerStephen Rothwell <sfr@canb.auug.org.au>2006-04-04 14:49:48 +1000
commit7d01c880856bae31502095bc68784c1518a680cb (patch)
tree8bc0a1b072d9fdf2bc15288e7ce712ff636a7cf8 /include/asm-powerpc
parent6246b6128bbe34d0752f119cf7c5111c85fe481d (diff)
downloadop-kernel-dev-7d01c880856bae31502095bc68784c1518a680cb.zip
op-kernel-dev-7d01c880856bae31502095bc68784c1518a680cb.tar.gz
powerpc: iSeries has only 256 IRQs
The iSeries Hypervisor only allows us to specify IRQ numbers up to 255 (it has a u8 field to pass it in). This patch allows platforms to specify a maximum to the virtual IRQ numbers we will use and has iSeries set that to 255. If not set, the maximum is NR_IRQS - 1 (as before). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/irq.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/asm-powerpc/irq.h b/include/asm-powerpc/irq.h
index 51f87d9..7bc6d73 100644
--- a/include/asm-powerpc/irq.h
+++ b/include/asm-powerpc/irq.h
@@ -54,6 +54,13 @@
*/
extern unsigned int virt_irq_to_real_map[NR_IRQS];
+/* The maximum virtual IRQ number that we support. This
+ * can be set by the platform and will be reduced by the
+ * value of __irq_offset_value. It defaults to and is
+ * capped by (NR_IRQS - 1).
+ */
+extern unsigned int virt_irq_max;
+
/* Create a mapping for a real_irq if it doesn't already exist.
* Return the virtual irq as a convenience.
*/
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